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1 | /*#######################################################################################*/ |
1 | /*#######################################################################################*/ |
2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
3 | /*#######################################################################################*/ |
3 | /*#######################################################################################*/ |
4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
5 | // + www.MikroKopter.com |
5 | // + www.MikroKopter.com |
6 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
6 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
7 | // + Software Nutzungsbedingungen (english version: see below) |
7 | // + Software Nutzungsbedingungen (english version: see below) |
8 | // + der Fa. HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland - nachfolgend Lizenzgeber genannt - |
8 | // + der Fa. HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland - nachfolgend Lizenzgeber genannt - |
9 | // + Der Lizenzgeber räumt dem Kunden ein nicht-ausschließliches, zeitlich und räumlich* unbeschränktes Recht ein, die im den |
9 | // + Der Lizenzgeber räumt dem Kunden ein nicht-ausschließliches, zeitlich und räumlich* unbeschränktes Recht ein, die im den |
10 | // + Mikrocontroller verwendete Firmware für die Hardware Flight-Ctrl, Navi-Ctrl, BL-Ctrl, MK3Mag & PC-Programm MikroKopter-Tool |
10 | // + Mikrocontroller verwendete Firmware für die Hardware Flight-Ctrl, Navi-Ctrl, BL-Ctrl, MK3Mag & PC-Programm MikroKopter-Tool |
11 | // + - nachfolgend Software genannt - nur für private Zwecke zu nutzen. |
11 | // + - nachfolgend Software genannt - nur für private Zwecke zu nutzen. |
12 | // + Der Einsatz dieser Software ist nur auf oder mit Produkten des Lizenzgebers zulässig. |
12 | // + Der Einsatz dieser Software ist nur auf oder mit Produkten des Lizenzgebers zulässig. |
13 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
13 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
14 | // + Die vom Lizenzgeber gelieferte Software ist urheberrechtlich geschützt. Alle Rechte an der Software sowie an sonstigen im |
14 | // + Die vom Lizenzgeber gelieferte Software ist urheberrechtlich geschützt. Alle Rechte an der Software sowie an sonstigen im |
15 | // + Rahmen der Vertragsanbahnung und Vertragsdurchführung überlassenen Unterlagen stehen im Verhältnis der Vertragspartner ausschließlich dem Lizenzgeber zu. |
15 | // + Rahmen der Vertragsanbahnung und Vertragsdurchführung überlassenen Unterlagen stehen im Verhältnis der Vertragspartner ausschließlich dem Lizenzgeber zu. |
16 | // + Die in der Software enthaltenen Copyright-Vermerke, Markenzeichen, andere Rechtsvorbehalte, Seriennummern sowie |
16 | // + Die in der Software enthaltenen Copyright-Vermerke, Markenzeichen, andere Rechtsvorbehalte, Seriennummern sowie |
17 | // + sonstige der Programmidentifikation dienenden Merkmale dürfen vom Kunden nicht verändert oder unkenntlich gemacht werden. |
17 | // + sonstige der Programmidentifikation dienenden Merkmale dürfen vom Kunden nicht verändert oder unkenntlich gemacht werden. |
18 | // + Der Kunde trifft angemessene Vorkehrungen für den sicheren Einsatz der Software. Er wird die Software gründlich auf deren |
18 | // + Der Kunde trifft angemessene Vorkehrungen für den sicheren Einsatz der Software. Er wird die Software gründlich auf deren |
19 | // + Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
19 | // + Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
20 | // + Die Haftung des Lizenzgebers wird - soweit gesetzlich zulässig - begrenzt in Höhe des typischen und vorhersehbaren |
20 | // + Die Haftung des Lizenzgebers wird - soweit gesetzlich zulässig - begrenzt in Höhe des typischen und vorhersehbaren |
21 | // + Schadens. Die gesetzliche Haftung bei Personenschäden und nach dem Produkthaftungsgesetz bleibt unberührt. Dem Lizenzgeber steht jedoch der Einwand |
21 | // + Schadens. Die gesetzliche Haftung bei Personenschäden und nach dem Produkthaftungsgesetz bleibt unberührt. Dem Lizenzgeber steht jedoch der Einwand |
22 | // + des Mitverschuldens offen. |
22 | // + des Mitverschuldens offen. |
23 | // + Der Kunde trifft angemessene Vorkehrungen für den Fall, dass die Software ganz oder teilweise nicht ordnungsgemäß arbeitet. |
23 | // + Der Kunde trifft angemessene Vorkehrungen für den Fall, dass die Software ganz oder teilweise nicht ordnungsgemäß arbeitet. |
24 | // + Er wird die Software gründlich auf deren Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
24 | // + Er wird die Software gründlich auf deren Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt. |
25 | // + Der Kunde wird er seine Daten vor Einsatz der Software nach dem Stand der Technik sichern. |
25 | // + Der Kunde wird er seine Daten vor Einsatz der Software nach dem Stand der Technik sichern. |
26 | // + Der Kunde ist darüber unterrichtet, dass der Lizenzgeber seine Daten im zur Vertragsdurchführung erforderlichen Umfang |
26 | // + Der Kunde ist darüber unterrichtet, dass der Lizenzgeber seine Daten im zur Vertragsdurchführung erforderlichen Umfang |
27 | // + und auf Grundlage der Datenschutzvorschriften erhebt, speichert, verarbeitet und, sofern notwendig, an Dritte übermittelt. |
27 | // + und auf Grundlage der Datenschutzvorschriften erhebt, speichert, verarbeitet und, sofern notwendig, an Dritte übermittelt. |
28 | // + *) Die räumliche Nutzung bezieht sich nur auf den Einsatzort, nicht auf die Reichweite der programmierten Software. |
28 | // + *) Die räumliche Nutzung bezieht sich nur auf den Einsatzort, nicht auf die Reichweite der programmierten Software. |
29 | // + #### ENDE DER NUTZUNGSBEDINGUNGEN ####' |
29 | // + #### ENDE DER NUTZUNGSBEDINGUNGEN ####' |
30 | // + Hinweis: Informationen über erweiterte Nutzungsrechte (wie z.B. Nutzung für nicht-private Zwecke) sind auf Anfrage per Email an info(@)hisystems.de verfügbar. |
30 | // + Hinweis: Informationen über erweiterte Nutzungsrechte (wie z.B. Nutzung für nicht-private Zwecke) sind auf Anfrage per Email an info(@)hisystems.de verfügbar. |
31 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
31 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
32 | // + Software LICENSING TERMS |
32 | // + Software LICENSING TERMS |
33 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
33 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
34 | // + of HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland, Germany - the Licensor - |
34 | // + of HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland, Germany - the Licensor - |
35 | // + The Licensor grants the customer a non-exclusive license to use the microcontroller firmware of the Flight-Ctrl, Navi-Ctrl, BL-Ctrl, and MK3Mag hardware |
35 | // + The Licensor grants the customer a non-exclusive license to use the microcontroller firmware of the Flight-Ctrl, Navi-Ctrl, BL-Ctrl, and MK3Mag hardware |
36 | // + (the Software) exclusively for private purposes. The License is unrestricted with respect to time and territory*. |
36 | // + (the Software) exclusively for private purposes. The License is unrestricted with respect to time and territory*. |
37 | // + The Software may only be used with the Licensor's products. |
37 | // + The Software may only be used with the Licensor's products. |
38 | // + The Software provided by the Licensor is protected by copyright. With respect to the relationship between the parties to this |
38 | // + The Software provided by the Licensor is protected by copyright. With respect to the relationship between the parties to this |
39 | // + agreement, all rights pertaining to the Software and other documents provided during the preparation and execution of this |
39 | // + agreement, all rights pertaining to the Software and other documents provided during the preparation and execution of this |
40 | // + agreement shall be the property of the Licensor. |
40 | // + agreement shall be the property of the Licensor. |
41 | // + The information contained in the Software copyright notices, trademarks, other legal reservations, serial numbers and other |
41 | // + The information contained in the Software copyright notices, trademarks, other legal reservations, serial numbers and other |
42 | // + features that can be used to identify the program may not be altered or defaced by the customer. |
42 | // + features that can be used to identify the program may not be altered or defaced by the customer. |
43 | // + The customer shall be responsible for taking reasonable precautions |
43 | // + The customer shall be responsible for taking reasonable precautions |
44 | // + for the safe use of the Software. The customer shall test the Software thoroughly regarding its suitability for the |
44 | // + for the safe use of the Software. The customer shall test the Software thoroughly regarding its suitability for the |
45 | // + intended purpose before implementing it for actual operation. The Licensor's liability shall be limited to the extent of typical and |
45 | // + intended purpose before implementing it for actual operation. The Licensor's liability shall be limited to the extent of typical and |
46 | // + foreseeable damage to the extent permitted by law, notwithstanding statutory liability for bodily injury and product |
46 | // + foreseeable damage to the extent permitted by law, notwithstanding statutory liability for bodily injury and product |
47 | // + liability. However, the Licensor shall be entitled to the defense of contributory negligence. |
47 | // + liability. However, the Licensor shall be entitled to the defense of contributory negligence. |
48 | // + The customer will take adequate precautions in the case, that the software is not working properly. The customer will test |
48 | // + The customer will take adequate precautions in the case, that the software is not working properly. The customer will test |
49 | // + the software for his purpose before any operational usage. The customer will backup his data before using the software. |
49 | // + the software for his purpose before any operational usage. The customer will backup his data before using the software. |
50 | // + The customer understands that the Licensor collects, stores and processes, and, where required, forwards, customer data |
50 | // + The customer understands that the Licensor collects, stores and processes, and, where required, forwards, customer data |
51 | // + to third parties to the extent necessary for executing the agreement, subject to applicable data protection and privacy regulations. |
51 | // + to third parties to the extent necessary for executing the agreement, subject to applicable data protection and privacy regulations. |
52 | // + *) The territory aspect only refers to the place where the Software is used, not its programmed range. |
52 | // + *) The territory aspect only refers to the place where the Software is used, not its programmed range. |
53 | // + #### END OF LICENSING TERMS #### |
53 | // + #### END OF LICENSING TERMS #### |
54 | // + Note: For information on license extensions (e.g. commercial use), please contact us at info(@)hisystems.de. |
54 | // + Note: For information on license extensions (e.g. commercial use), please contact us at info(@)hisystems.de. |
55 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
55 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
56 | #include <stdio.h> |
56 | #include <stdio.h> |
57 | #include <string.h> |
57 | #include <string.h> |
58 | #include "91x_lib.h" |
58 | #include "91x_lib.h" |
59 | #include "timer1.h" |
59 | #include "timer1.h" |
60 | #include "fat16.h" |
60 | #include "fat16.h" |
61 | #include "sdc.h" |
61 | #include "sdc.h" |
62 | #include "uart1.h" |
62 | #include "uart1.h" |
63 | #include "main.h" |
63 | #include "main.h" |
64 | #include "logging.h" |
64 | #include "logging.h" |
65 | #include "debug.h" |
65 | #include "debug.h" |
66 | 66 | ||
67 | 67 | ||
68 | //________________________________________________________________________________________________________________________________________ |
68 | //________________________________________________________________________________________________________________________________________ |
69 | // Module name: fat16.c |
69 | // Module name: fat16.c |
70 | // Compiler used: avr-gcc 3.4.5 |
70 | // Compiler used: avr-gcc 3.4.5 |
71 | // Last Modifikation: 1.12.2012 |
71 | // Last Modifikation: 1.12.2012 |
72 | // Version: 2.11 |
72 | // Version: 2.11 |
73 | // Authors: Stephan Busker & Gregor Stobrawa |
73 | // Authors: Stephan Busker & Gregor Stobrawa |
74 | // Description: Source files for FAT16 implementation with read and write-access |
74 | // Description: Source files for FAT16 implementation with read and write-access |
75 | // Copyright (C) 2008 Stephan Busker & Gregor Stobrawa |
75 | // Copyright (C) 2008 Stephan Busker & Gregor Stobrawa |
76 | //........................................................................................................................................ |
76 | //........................................................................................................................................ |
77 | // Functions: extern s16 Fat16_Init(void); |
77 | // Functions: extern s16 Fat16_Init(void); |
78 | // extern s16 Fat16_Deinit(void); |
78 | // extern s16 Fat16_Deinit(void); |
79 | // extern s8* FAT16_GetVolumeLabel(void); |
79 | // extern s8* FAT16_GetVolumeLabel(void); |
80 | // |
80 | // |
81 | // extern File_t * fopen_(const u8 *filename, const s8 mode); |
81 | // extern File_t * fopen_(const u8 *filename, const s8 mode); |
82 | // extern s16 fclose_(File_t *file); |
82 | // extern s16 fclose_(File_t *file); |
83 | // extern u8 fexist_(s8 * const filename); |
83 | // extern u8 fexist_(s8 * const filename); |
84 | // extern s16 fflush_(File_t *file); |
84 | // extern s16 fflush_(File_t *file); |
85 | // extern s16 fseek_(File_t *file, s32 offset, s16 origin); |
85 | // extern s16 fseek_(File_t *file, s32 offset, s16 origin); |
86 | // extern s16 fgetc_(File_t *file); |
86 | // extern s16 fgetc_(File_t *file); |
87 | // extern s16 fputc_(u8 c, File_t *file); |
87 | // extern s16 fputc_(u8 c, File_t *file); |
88 | // extern u32 fread_(void *buffer, u32 size, u32 count, File_t *file); |
88 | // extern u32 fread_(void *buffer, u32 size, u32 count, File_t *file); |
89 | // extern u32 fwrite_(void *buffer, u32 size, u32 count, File_t *file); |
89 | // extern u32 fwrite_(void *buffer, u32 size, u32 count, File_t *file); |
90 | // extern s16 fputs_(const u8 *string, File_t *File); |
90 | // extern s16 fputs_(const u8 *string, File_t *File); |
91 | // extern u8 * fgets_(u8 *string, s16 length, File_t *file); |
91 | // extern u8 * fgets_(u8 *string, s16 length, File_t *file); |
92 | // extern u8 feof_(File_t * const file); |
92 | // extern u8 feof_(File_t * const file); |
93 | // extern u8 fdelete_(s8* const filepath); |
93 | // extern u8 fdelete_(s8* const filepath); |
94 | // |
94 | // |
95 | // extern s8 *getcwd_(void); |
95 | // extern s8 *getcwd_(void); |
96 | // extern u8 chdir_(s8* const dirpath); |
96 | // extern u8 chdir_(s8* const dirpath); |
97 | // extern u8 mkdir_(s8* const dirpath); |
97 | // extern u8 mkdir_(s8* const dirpath); |
98 | // extern u8 rmdir_(s8* const dirpath); |
98 | // extern u8 rmdir_(s8* const dirpath); |
99 | // extern u8 findfirst_(const s8* name, u8 attribmask, Find_t *); |
99 | // extern u8 findfirst_(const s8* name, u8 attribmask, Find_t *); |
100 | // extern u8 findnext_(Find_t *); |
100 | // extern u8 findnext_(Find_t *); |
101 | //........................................................................................................................................ |
101 | //........................................................................................................................................ |
102 | // ext. functions: extern SD_Result_t SDC_Init(void;) |
102 | // ext. functions: extern SD_Result_t SDC_Init(void;) |
103 | // extern SD_Result_t SDC_Deinit(void); |
103 | // extern SD_Result_t SDC_Deinit(void); |
104 | // extern SD_Result_t SDC_GetSector (u32,u8 *); |
104 | // extern SD_Result_t SDC_GetSector (u32,u8 *); |
105 | // extern SD_Result_t SDC_PutSector (u32,u8 *); |
105 | // extern SD_Result_t SDC_PutSector (u32,u8 *); |
106 | //........................................................................................................................................ |
106 | //........................................................................................................................................ |
107 | // |
107 | // |
108 | // URL: www.Mikro-Control.de |
108 | // URL: www.Mikro-Control.de |
109 | // mailto: stephan.busker@mikro-control.de |
109 | // mailto: stephan.busker@mikro-control.de |
110 | //________________________________________________________________________________________________________________________________________ |
110 | //________________________________________________________________________________________________________________________________________ |
111 | 111 | ||
112 | /* |
112 | /* |
113 | FAT16 Drive Layout: |
113 | FAT16 Drive Layout: |
114 | Description Offset |
114 | Description Offset |
115 | Volume Boot Sector Start of Partition |
115 | Volume Boot Sector Start of Partition |
116 | Fat Tables Start + # of Reserved Sectors |
116 | Fat Tables Start + # of Reserved Sectors |
117 | Root Directory Entry Start + # of Reserved + (# of Sectors Per FAT * 2) |
117 | Root Directory Entry Start + # of Reserved + (# of Sectors Per FAT * 2) |
118 | Data Area (Starts with Cluster #2) Start + # of Reserved + (# of Sectors Per FAT * 2) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
118 | Data Area (Starts with Cluster #2) Start + # of Reserved + (# of Sectors Per FAT * 2) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
119 | */ |
119 | */ |
120 | 120 | ||
121 | 121 | ||
122 | 122 | ||
123 | /* |
123 | /* |
124 | ________________________________________________________________________________________________________________________________________ |
124 | ________________________________________________________________________________________________________________________________________ |
125 | 125 | ||
126 | Structure of an partition entry |
126 | Structure of an partition entry |
127 | ________________________________________________________________________________________________________________________________________ |
127 | ________________________________________________________________________________________________________________________________________ |
128 | 128 | ||
129 | Partition Entry is 16 bytes long |
129 | Partition Entry is 16 bytes long |
130 | */ |
130 | */ |
131 | typedef struct |
131 | typedef struct |
132 | { |
132 | { |
133 | u8 PartitionState; // Current State of Partition (00h=Inactive, 80h=Active) |
133 | u8 PartitionState; // Current State of Partition (00h=Inactive, 80h=Active) |
134 | u8 BeginningHead; // Beginning of Partition - Head |
134 | u8 BeginningHead; // Beginning of Partition - Head |
135 | u16 BeginningCylSec; // Beginning of Partition - Cylinder/Sector (See Below) |
135 | u16 BeginningCylSec; // Beginning of Partition - Cylinder/Sector (See Below) |
136 | u8 Type; // Type of Partition (See List Below) |
136 | u8 Type; // Type of Partition (See List Below) |
137 | u8 EndHead; // End of Partition - Head |
137 | u8 EndHead; // End of Partition - Head |
138 | u16 EndCylSec; // End of Partition - Cylinder/Sector |
138 | u16 EndCylSec; // End of Partition - Cylinder/Sector |
139 | u32 NoSectorsBeforePartition; // Number of Sectors between the MBR and the First Sector in the Partition |
139 | u32 NoSectorsBeforePartition; // Number of Sectors between the MBR and the First Sector in the Partition |
140 | u32 NoSectorsPartition ; // Number of Sectors in the Partition |
140 | u32 NoSectorsPartition ; // Number of Sectors in the Partition |
141 | } __attribute__((packed)) PartitionEntry_t; |
141 | } __attribute__((packed)) PartitionEntry_t; |
142 | 142 | ||
143 | 143 | ||
144 | 144 | ||
145 | /* |
145 | /* |
146 | Coding of Cylinder/Sector words |
146 | Coding of Cylinder/Sector words |
147 | 147 | ||
148 | Cylinder is 10 bits: [7:0] at [15:8] and [9:8] at [7:6] |
148 | Cylinder is 10 bits: [7:0] at [15:8] and [9:8] at [7:6] |
149 | Sector is 5 bits: [5:0] at [5:0] |
149 | Sector is 5 bits: [5:0] at [5:0] |
150 | */ |
150 | */ |
151 | 151 | ||
152 | // Partition Types: |
152 | // Partition Types: |
153 | #define PART_TYPE_UNKNOWN 0x00 |
153 | #define PART_TYPE_UNKNOWN 0x00 |
154 | #define PART_TYPE_FAT12 0x01 |
154 | #define PART_TYPE_FAT12 0x01 |
155 | #define PART_TYPE_XENIX 0x02 |
155 | #define PART_TYPE_XENIX 0x02 |
156 | #define PART_TYPE_FAT16_ST_32_MB 0x04 |
156 | #define PART_TYPE_FAT16_ST_32_MB 0x04 |
157 | #define PART_TYPE_EXTDOS 0x05 |
157 | #define PART_TYPE_EXTDOS 0x05 |
158 | #define PART_TYPE_FAT16_LT_32_MB 0x06 |
158 | #define PART_TYPE_FAT16_LT_32_MB 0x06 |
159 | #define PART_TYPE_NTFS 0x07 |
159 | #define PART_TYPE_NTFS 0x07 |
160 | #define PART_TYPE_FAT32 0x0B |
160 | #define PART_TYPE_FAT32 0x0B |
161 | #define PART_TYPE_FAT32LBA 0x0C |
161 | #define PART_TYPE_FAT32LBA 0x0C |
162 | #define PART_TYPE_FAT16LBA 0x0E |
162 | #define PART_TYPE_FAT16LBA 0x0E |
163 | #define PART_TYPE_EXTDOSLBA 0x0F |
163 | #define PART_TYPE_EXTDOSLBA 0x0F |
164 | #define PART_TYPE_EISA 0x12 |
164 | #define PART_TYPE_EISA 0x12 |
165 | #define PART_TYPE_ONTRACK 0x33 |
165 | #define PART_TYPE_ONTRACK 0x33 |
166 | #define PART_TYPE_NOVELL 0x40 |
166 | #define PART_TYPE_NOVELL 0x40 |
167 | #define PART_TYPE_DYNAMIC 0x42 |
167 | #define PART_TYPE_DYNAMIC 0x42 |
168 | #define PART_TYPE_PCIX 0x4B |
168 | #define PART_TYPE_PCIX 0x4B |
169 | #define PART_TYPE_LINUX_SWAP 0x82 |
169 | #define PART_TYPE_LINUX_SWAP 0x82 |
170 | #define PART_TYPE_LINUX_NATIVE 0x83 |
170 | #define PART_TYPE_LINUX_NATIVE 0x83 |
171 | #define PART_TYPE_LINUX_LVM 0x8E |
171 | #define PART_TYPE_LINUX_LVM 0x8E |
172 | #define PART_TYPE_PHOENIXSAVE 0xA0 |
172 | #define PART_TYPE_PHOENIXSAVE 0xA0 |
173 | #define PART_TYPE_FREEBSD 0xA5 |
173 | #define PART_TYPE_FREEBSD 0xA5 |
174 | #define PART_TYPE_OPENBSD 0xA6 |
174 | #define PART_TYPE_OPENBSD 0xA6 |
175 | #define PART_TYPE_NETNBSD 0xA9 |
175 | #define PART_TYPE_NETNBSD 0xA9 |
176 | #define PART_TYPE_CPM 0xDB |
176 | #define PART_TYPE_CPM 0xDB |
177 | #define PART_TYPE_DBFS 0xE0 |
177 | #define PART_TYPE_DBFS 0xE0 |
178 | #define PART_TYPE_BBT 0xFF |
178 | #define PART_TYPE_BBT 0xFF |
179 | 179 | ||
180 | 180 | ||
181 | /* |
181 | /* |
182 | ________________________________________________________________________________________________________________________________________ |
182 | ________________________________________________________________________________________________________________________________________ |
183 | 183 | ||
184 | Structure of the MasterBootRecord |
184 | Structure of the MasterBootRecord |
185 | ________________________________________________________________________________________________________________________________________ |
185 | ________________________________________________________________________________________________________________________________________ |
186 | 186 | ||
187 | Master Boot Record is 512 bytes long |
187 | Master Boot Record is 512 bytes long |
188 | The Master Boot Record is the same for pretty much all Operating Systems. |
188 | The Master Boot Record is the same for pretty much all Operating Systems. |
189 | It is located on the first Sector of the Hard Drive, at Cylinder 0, Head 0, Sector 1 |
189 | It is located on the first Sector of the Hard Drive, at Cylinder 0, Head 0, Sector 1 |
190 | */ |
190 | */ |
191 | typedef struct |
191 | typedef struct |
192 | { |
192 | { |
193 | u8 ExecutableCode[446]; // 446 bytes for machine start code |
193 | u8 ExecutableCode[446]; // 446 bytes for machine start code |
194 | PartitionEntry_t PartitionEntry1; // 16 bytes for partition entry 1 |
194 | PartitionEntry_t PartitionEntry1; // 16 bytes for partition entry 1 |
195 | PartitionEntry_t PartitionEntry2; // 16 bytes for partition entry 2 |
195 | PartitionEntry_t PartitionEntry2; // 16 bytes for partition entry 2 |
196 | PartitionEntry_t PartitionEntry3; // 16 bytes for partition entry 3 |
196 | PartitionEntry_t PartitionEntry3; // 16 bytes for partition entry 3 |
197 | PartitionEntry_t PartitionEntry4; // 16 bytes for partition entry 4 |
197 | PartitionEntry_t PartitionEntry4; // 16 bytes for partition entry 4 |
198 | u16 ExecutableMarker; // BIOS-Signature (0x55 0xAA) |
198 | u16 ExecutableMarker; // BIOS-Signature (0x55 0xAA) |
199 | } __attribute__((packed)) MBR_Entry_t; |
199 | } __attribute__((packed)) MBR_Entry_t; |
200 | 200 | ||
201 | 201 | ||
202 | /* |
202 | /* |
203 | ________________________________________________________________________________________________________________________________________ |
203 | ________________________________________________________________________________________________________________________________________ |
204 | 204 | ||
205 | Structure of the VolumeBootRecord |
205 | Structure of the VolumeBootRecord |
206 | ________________________________________________________________________________________________________________________________________ |
206 | ________________________________________________________________________________________________________________________________________ |
207 | 207 | ||
208 | The Volume Boot Record is 512 bytes long |
208 | The Volume Boot Record is 512 bytes long |
209 | This information is located in the first sector of every partition. |
209 | This information is located in the first sector of every partition. |
210 | */ |
210 | */ |
211 | typedef struct |
211 | typedef struct |
212 | { |
212 | { |
213 | u8 JumpCode[3]; // Jump Code + NOP |
213 | u8 JumpCode[3]; // Jump Code + NOP |
214 | s8 OEMName[8]; // OEM Name |
214 | s8 OEMName[8]; // OEM Name |
215 | u16 BytesPerSector; // Bytes Per Sector |
215 | u16 BytesPerSector; // Bytes Per Sector |
216 | u8 SectorsPerCluster; // Sectors Per Cluster |
216 | u8 SectorsPerCluster; // Sectors Per Cluster |
217 | u16 ReservedSectors; // Reserved Sectors |
217 | u16 ReservedSectors; // Reserved Sectors |
218 | u8 NoFATCopies; // Number of Copies of FAT |
218 | u8 NoFATCopies; // Number of Copies of FAT |
219 | u16 MaxRootEntries; // Maximum Root Directory Entries |
219 | u16 MaxRootEntries; // Maximum Root Directory Entries |
220 | u16 NoSectorsInPartSml32MB; // Number of Sectors in Partition Smaller than 32 MB |
220 | u16 NoSectorsInPartSml32MB; // Number of Sectors in Partition Smaller than 32 MB |
221 | u8 MediaDescriptor; // Media Descriptor (0xF8 for Hard Disks) |
221 | u8 MediaDescriptor; // Media Descriptor (0xF8 for Hard Disks) |
222 | u16 SectorsPerFAT; // Sectors Per FAT |
222 | u16 SectorsPerFAT; // Sectors Per FAT |
223 | u16 SectorsPerTrack; // Sectors Per Track |
223 | u16 SectorsPerTrack; // Sectors Per Track |
224 | u16 NoHeads; // Number of Heads |
224 | u16 NoHeads; // Number of Heads |
225 | u32 NoHiddenSectors; // Number of Hidden Sectors in Partition |
225 | u32 NoHiddenSectors; // Number of Hidden Sectors in Partition |
226 | u32 NoSectors; // Number of Sectors in Partition |
226 | u32 NoSectors; // Number of Sectors in Partition |
227 | u16 DriveNo; // Logical Drive Number of Partition |
227 | u16 DriveNo; // Logical Drive Number of Partition |
228 | u8 ExtendedSig; // Extended Signature (0x29) |
228 | u8 ExtendedSig; // Extended Signature (0x29) |
229 | u32 SerialNo; // Serial Number of the Partition |
229 | u32 SerialNo; // Serial Number of the Partition |
230 | s8 VolumeName[11]; // Volume Name of the Partititon |
230 | s8 VolumeName[11]; // Volume Name of the Partititon |
231 | s8 FATName[8]; // FAT Name (FAT16) |
231 | s8 FATName[8]; // FAT Name (FAT16) |
232 | u8 ExecutableCode[446]; // 446 bytes for machine start code |
232 | u8 ExecutableCode[446]; // 446 bytes for machine start code |
233 | u16 ExecutableMarker; // Executable Marker (0x55 0xAA) |
233 | u16 ExecutableMarker; // Executable Marker (0x55 0xAA) |
234 | } __attribute__((packed)) VBR_Entry_t; |
234 | } __attribute__((packed)) VBR_Entry_t; |
235 | 235 | ||
236 | 236 | ||
237 | 237 | ||
238 | /* |
238 | /* |
239 | ________________________________________________________________________________________________________________________________________ |
239 | ________________________________________________________________________________________________________________________________________ |
240 | 240 | ||
241 | Structure of an directory entry |
241 | Structure of an directory entry |
242 | ________________________________________________________________________________________________________________________________________ |
242 | ________________________________________________________________________________________________________________________________________ |
243 | 243 | ||
244 | Directory entry is 32 bytes. |
244 | Directory entry is 32 bytes. |
245 | */ |
245 | */ |
246 | typedef struct |
246 | typedef struct |
247 | { |
247 | { |
248 | s8 Name[8]; // 8 bytes name, padded with spaces. |
248 | s8 Name[8]; // 8 bytes name, padded with spaces. |
249 | u8 Extension[3]; // 3 bytes extension, padded with spaces. |
249 | u8 Extension[3]; // 3 bytes extension, padded with spaces. |
250 | u8 Attribute; // attribute of the directory entry (unused,archive,read-only,system,directory,volume) |
250 | u8 Attribute; // attribute of the directory entry (unused,archive,read-only,system,directory,volume) |
251 | u8 Res1; // should be zero |
251 | u8 Res1; // should be zero |
252 | u8 CreationTime10ms; // subsecond resolution of creation time |
252 | u8 CreationTime10ms; // subsecond resolution of creation time |
253 | u16 CreationTime; // Time of creation h:m:s |
253 | u16 CreationTime; // Time of creation h:m:s |
254 | u16 CreationDate; // Date of creation Y.M.D |
254 | u16 CreationDate; // Date of creation Y.M.D |
255 | u16 LastAccessDate; // The date where the file was last accessed |
255 | u16 LastAccessDate; // The date where the file was last accessed |
256 | u8 Res2[2]; // should be zero |
256 | u8 Res2[2]; // should be zero |
257 | u16 ModTime; // date of last write access |
257 | u16 ModTime; // date of last write access |
258 | u16 ModDate; // date of last write access to the file or directory. |
258 | u16 ModDate; // date of last write access to the file or directory. |
259 | u16 StartCluster; // first cluster of the file or directory. |
259 | u16 StartCluster; // first cluster of the file or directory. |
260 | u32 Size; // size of the file or directory in bytes. |
260 | u32 Size; // size of the file or directory in bytes. |
261 | } __attribute__((packed)) DirEntry_t; |
261 | } __attribute__((packed)) DirEntry_t; |
262 | 262 | ||
263 | #define SLOT_EMPTY 0x00 // slot has never been used |
263 | #define SLOT_EMPTY 0x00 // slot has never been used |
264 | #define SLOT_E5 0x05 // the real value is 0xE5 |
264 | #define SLOT_E5 0x05 // the real value is 0xE5 |
265 | #define SLOT_DELETED 0xE5 // file in this slot deleted |
265 | #define SLOT_DELETED 0xE5 // file in this slot deleted |
266 | 266 | ||
267 | /* |
267 | /* |
268 | ________________________________________________________________________________________________________________________________________ |
268 | ________________________________________________________________________________________________________________________________________ |
269 | 269 | ||
270 | Structure of an entry within the fileallocationtable. |
270 | Structure of an entry within the fileallocationtable. |
271 | ________________________________________________________________________________________________________________________________________ |
271 | ________________________________________________________________________________________________________________________________________ |
272 | */ |
272 | */ |
273 | typedef struct |
273 | typedef struct |
274 | { |
274 | { |
275 | u16 NextCluster; // the next cluster of the file. |
275 | u16 NextCluster; // the next cluster of the file. |
276 | } __attribute__((packed)) Fat16Entry_t; |
276 | } __attribute__((packed)) Fat16Entry_t; |
277 | 277 | ||
278 | // secial fat entries |
278 | // secial fat entries |
279 | #define FAT16_CLUSTER_FREE 0x0000 |
279 | #define FAT16_CLUSTER_FREE 0x0000 |
280 | #define FAT16_CLUSTER_RESERVED 0x0001 |
280 | #define FAT16_CLUSTER_RESERVED 0x0001 |
281 | #define FAT16_CLUSTER_USED_MIN 0x0002 |
281 | #define FAT16_CLUSTER_USED_MIN 0x0002 |
282 | #define FAT16_CLUSTER_USED_MAX 0xFFEF |
282 | #define FAT16_CLUSTER_USED_MAX 0xFFEF |
283 | #define FAT16_CLUSTER_ROOTDIR_MIN 0xFFF0 |
283 | #define FAT16_CLUSTER_ROOTDIR_MIN 0xFFF0 |
284 | #define FAT16_CLUSTER_ROOTDIR_MAX 0xFFF6 |
284 | #define FAT16_CLUSTER_ROOTDIR_MAX 0xFFF6 |
285 | #define FAT16_CLUSTER_BAD 0xFFF7 |
285 | #define FAT16_CLUSTER_BAD 0xFFF7 |
286 | #define FAT16_CLUSTER_LAST_MIN 0xFFF8 |
286 | #define FAT16_CLUSTER_LAST_MIN 0xFFF8 |
287 | #define FAT16_CLUSTER_LAST_MAX 0xFFFF |
287 | #define FAT16_CLUSTER_LAST_MAX 0xFFFF |
288 | 288 | ||
289 | /*****************************************************************************************************************************************/ |
289 | /*****************************************************************************************************************************************/ |
290 | /* */ |
290 | /* */ |
291 | /* Global variables needed for read- or write-acces to the FAT16- filesystem. */ |
291 | /* Global variables needed for read- or write-acces to the FAT16- filesystem. */ |
292 | /* */ |
292 | /* */ |
293 | /*****************************************************************************************************************************************/ |
293 | /*****************************************************************************************************************************************/ |
294 | 294 | ||
295 | #define MBR_SECTOR 0x00 // the masterboot record is located in sector 0. |
295 | #define MBR_SECTOR 0x00 // the masterboot record is located in sector 0. |
296 | #define DIRENTRY_SIZE 32 //bytes |
296 | #define DIRENTRY_SIZE 32 //bytes |
297 | #define DIRENTRIES_PER_SECTOR BYTES_PER_SECTOR/DIRENTRY_SIZE |
297 | #define DIRENTRIES_PER_SECTOR BYTES_PER_SECTOR/DIRENTRY_SIZE |
298 | #define FAT16_BYTES 2 |
298 | #define FAT16_BYTES 2 |
299 | #define FAT16_ENTRIES_PER_SECTOR BYTES_PER_SECTOR/FAT16_BYTES |
299 | #define FAT16_ENTRIES_PER_SECTOR BYTES_PER_SECTOR/FAT16_BYTES |
300 | 300 | ||
301 | #define SECTOR_UNDEFINED 0x00000000L |
301 | #define SECTOR_UNDEFINED 0x00000000L |
302 | #define CLUSTER_UNDEFINED 0x0000 |
302 | #define CLUSTER_UNDEFINED 0x0000 |
303 | 303 | ||
304 | #define FSTATE_UNUSED 0 |
304 | #define FSTATE_UNUSED 0 |
305 | #define FSTATE_USED 1 |
305 | #define FSTATE_USED 1 |
306 | - | ||
307 | typedef struct |
- | |
308 | { |
- | |
309 | u8 IsValid; // 0 means invalid, else valid |
- | |
310 | u8 SectorsPerCluster; // how many sectors does a cluster contain? |
- | |
311 | u8 FatCopies; // Numbers of copies of the FAT |
- | |
312 | u16 MaxRootEntries; // Possible number of entries in the root directory. |
- | |
313 | u16 SectorsPerFat; // how many sectors does a fat16 contain? |
- | |
314 | u32 FirstFatSector; // sector of the start of the fat |
- | |
315 | u32 FirstRootDirSector; // sector of the rootdirectory |
- | |
316 | u32 FirstDataSector; // sector of the first cluster containing data (cluster2). |
- | |
317 | u32 LastDataSector; // the last data sector of the partition |
- | |
318 | u8 VolumeLabel[12]; // the volume label |
- | |
319 | u32 CurrentWorkingDirectory;// A pointer to the directory we are actual using |
- | |
320 | s8 PathToCwd[256]; // a string containing the complete path to the current working directory |
- | |
321 | } __attribute__((packed)) Partition_t; |
306 | |
322 | 307 | ||
323 | Partition_t Partition; // Structure holds partition information |
308 | Partition_t Partition; // Structure holds partition information |
324 | 309 | ||
325 | File_t FilePointer[FILE_MAX_OPEN]; // Allocate Memmoryspace for each filepointer used. |
310 | File_t FilePointer[FILE_MAX_OPEN]; // Allocate Memmoryspace for each filepointer used. |
326 | 311 | ||
327 | /********************************************************************************************************************************************/ |
312 | /********************************************************************************************************************************************/ |
328 | /* Function: s8 *getcwd_(void); */ |
313 | /* Function: s8 *getcwd_(void); */ |
329 | /* */ |
314 | /* */ |
330 | /* Description: This function returns a pointer to the absolute path of the active partition */ |
315 | /* Description: This function returns a pointer to the absolute path of the active partition */ |
331 | /* */ |
316 | /* */ |
332 | /* */ |
317 | /* */ |
333 | /* Returnvalue: pointer to the string containing the path to the CWD */ |
318 | /* Returnvalue: pointer to the string containing the path to the CWD */ |
334 | /********************************************************************************************************************************************/ |
319 | /********************************************************************************************************************************************/ |
335 | 320 | ||
336 | s8 *getcwd_(void) |
321 | s8 *getcwd_(void) |
337 | { |
322 | { |
338 | return(Partition.PathToCwd); |
323 | return(Partition.PathToCwd); |
339 | } |
324 | } |
340 | 325 | ||
341 | /********************************************************************************************************************************************/ |
326 | /********************************************************************************************************************************************/ |
342 | /* Function: void CWDPath_Push(s8* directory); */ |
327 | /* Function: void CWDPath_Push(s8* directory); */ |
343 | /* */ |
328 | /* */ |
344 | /* Description: This function function appends the name of an directory to the path of the CWD */ |
329 | /* Description: This function function appends the name of an directory to the path of the CWD */ |
345 | /* */ |
330 | /* */ |
346 | /* */ |
331 | /* */ |
347 | /* Returnvalue: none */ |
332 | /* Returnvalue: none */ |
348 | /********************************************************************************************************************************************/ |
333 | /********************************************************************************************************************************************/ |
349 | 334 | ||
350 | void CWDPath_Push(s8* directory) |
335 | void CWDPath_Push(s8* directory) |
351 | { |
336 | { |
352 | // append the name of the directory to the path |
337 | // append the name of the directory to the path |
353 | strcat(Partition.PathToCwd, directory); |
338 | strcat(Partition.PathToCwd, directory); |
354 | // append a '/' after the directoryname |
339 | // append a '/' after the directoryname |
355 | strcat(Partition.PathToCwd, "/"); |
340 | strcat(Partition.PathToCwd, "/"); |
356 | } |
341 | } |
357 | 342 | ||
358 | /********************************************************************************************************************************************/ |
343 | /********************************************************************************************************************************************/ |
359 | /* Function: CWDPath_Pop(void); */ |
344 | /* Function: CWDPath_Pop(void); */ |
360 | /* */ |
345 | /* */ |
361 | /* Description: This function removes the last directory from the path to the CWD */ |
346 | /* Description: This function removes the last directory from the path to the CWD */ |
362 | /* */ |
347 | /* */ |
363 | /* */ |
348 | /* */ |
364 | /* Returnvalue: none */ |
349 | /* Returnvalue: none */ |
365 | /********************************************************************************************************************************************/ |
350 | /********************************************************************************************************************************************/ |
366 | 351 | ||
367 | void CWDPath_Pop(void) |
352 | void CWDPath_Pop(void) |
368 | { |
353 | { |
369 | // a pointer to the beginning of the absolute path to the cwd |
354 | // a pointer to the beginning of the absolute path to the cwd |
370 | s8 * cptr = Partition.PathToCwd; |
355 | s8 * cptr = Partition.PathToCwd; |
371 | // lets find the end of the path to the cwd |
356 | // lets find the end of the path to the cwd |
372 | while(*cptr != 0 ) cptr++; |
357 | while(*cptr != 0 ) cptr++; |
373 | // if the path is terminated with an '/' then remove it |
358 | // if the path is terminated with an '/' then remove it |
374 | if((*(cptr-1)) == '/') *(cptr-1) = 0; |
359 | if((*(cptr-1)) == '/') *(cptr-1) = 0; |
375 | // now lets find the beginning of the last directory entry |
360 | // now lets find the beginning of the last directory entry |
376 | while((*cptr != '/' ) && cptr > Partition.PathToCwd) cptr--; |
361 | while((*cptr != '/' ) && cptr > Partition.PathToCwd) cptr--; |
377 | // is there one subdirectory left within the path? |
362 | // is there one subdirectory left within the path? |
378 | if(cptr > Partition.PathToCwd) |
363 | if(cptr > Partition.PathToCwd) |
379 | { |
364 | { |
380 | // we delete the direntry by terminating the path with 0 |
365 | // we delete the direntry by terminating the path with 0 |
381 | *(cptr+1) = 0; |
366 | *(cptr+1) = 0; |
382 | } |
367 | } |
383 | // there is no subdirectory left within the path. Therefore we create the root instead. |
368 | // there is no subdirectory left within the path. Therefore we create the root instead. |
384 | else |
369 | else |
385 | { |
370 | { |
386 | *cptr = '/'; |
371 | *cptr = '/'; |
387 | *(cptr+1) = 0; |
372 | *(cptr+1) = 0; |
388 | } |
373 | } |
389 | } |
374 | } |
390 | 375 | ||
391 | /****************************************************************************************************************************************/ |
376 | /****************************************************************************************************************************************/ |
392 | /* Function: FileDate(DateTime_t *); */ |
377 | /* Function: FileDate(DateTime_t *); */ |
393 | /* */ |
378 | /* */ |
394 | /* Description: This function calculates the DOS date from a pointer to a time structure. */ |
379 | /* Description: This function calculates the DOS date from a pointer to a time structure. */ |
395 | /* */ |
380 | /* */ |
396 | /* Returnvalue: Returns the DOS date. */ |
381 | /* Returnvalue: Returns the DOS date. */ |
397 | /****************************************************************************************************************************************/ |
382 | /****************************************************************************************************************************************/ |
398 | u16 FileDate(DateTime_t * pTimeStruct) |
383 | u16 FileDate(DateTime_t * pTimeStruct) |
399 | { |
384 | { |
400 | u16 date = 0; |
385 | u16 date = 0; |
401 | if(pTimeStruct == NULL) return date; |
386 | if(pTimeStruct == NULL) return date; |
402 | if(!(pTimeStruct->Valid)) return date; |
387 | if(!(pTimeStruct->Valid)) return date; |
403 | 388 | ||
404 | date |= (0x007F & (u16)(pTimeStruct->Year - 1980))<<9; // set year |
389 | date |= (0x007F & (u16)(pTimeStruct->Year - 1980))<<9; // set year |
405 | date |= (0x000F & (u16)(pTimeStruct->Month))<<5; // set month |
390 | date |= (0x000F & (u16)(pTimeStruct->Month))<<5; // set month |
406 | date |= (0x001F & (u16)(pTimeStruct->Day)); |
391 | date |= (0x001F & (u16)(pTimeStruct->Day)); |
407 | return date; |
392 | return date; |
408 | } |
393 | } |
409 | 394 | ||
410 | /****************************************************************************************************************************************/ |
395 | /****************************************************************************************************************************************/ |
411 | /* Function: FileTime(DateTime_t *); */ |
396 | /* Function: FileTime(DateTime_t *); */ |
412 | /* */ |
397 | /* */ |
413 | /* Description: This function calculates the DOS time from a pointer to a time structure. */ |
398 | /* Description: This function calculates the DOS time from a pointer to a time structure. */ |
414 | /* */ |
399 | /* */ |
415 | /* Returnvalue: Returns the DOS time. */ |
400 | /* Returnvalue: Returns the DOS time. */ |
416 | /****************************************************************************************************************************************/ |
401 | /****************************************************************************************************************************************/ |
417 | 402 | ||
418 | u16 FileTime(DateTime_t * pTimeStruct) |
403 | u16 FileTime(DateTime_t * pTimeStruct) |
419 | { |
404 | { |
420 | u16 time = 0; |
405 | u16 time = 0; |
421 | if(pTimeStruct == NULL) return time; |
406 | if(pTimeStruct == NULL) return time; |
422 | if(!(pTimeStruct->Valid)) return time; |
407 | if(!(pTimeStruct->Valid)) return time; |
423 | 408 | ||
424 | time |= (0x001F & (u16)(pTimeStruct->Hour))<<11; |
409 | time |= (0x001F & (u16)(pTimeStruct->Hour))<<11; |
425 | time |= (0x003F & (u16)(pTimeStruct->Min))<<5; |
410 | time |= (0x003F & (u16)(pTimeStruct->Min))<<5; |
426 | time |= (0x001F & (u16)(pTimeStruct->Sec/2)); |
411 | time |= (0x001F & (u16)(pTimeStruct->Sec/2)); |
427 | return time; |
412 | return time; |
428 | } |
413 | } |
429 | 414 | ||
430 | /****************************************************************************************************************************************/ |
415 | /****************************************************************************************************************************************/ |
431 | /* Function: LockFilePointer(); */ |
416 | /* Function: LockFilePointer(); */ |
432 | /* */ |
417 | /* */ |
433 | /* Description: This function trys to lock a free file pointer. */ |
418 | /* Description: This function trys to lock a free file pointer. */ |
434 | /* */ |
419 | /* */ |
435 | /* Returnvalue: Returns the Filepointer on success or 0. */ |
420 | /* Returnvalue: Returns the Filepointer on success or 0. */ |
436 | /****************************************************************************************************************************************/ |
421 | /****************************************************************************************************************************************/ |
437 | File_t * LockFilePointer(void) |
422 | File_t * LockFilePointer(void) |
438 | { |
423 | { |
439 | u8 i; |
424 | u8 i; |
440 | File_t * File = 0; |
425 | File_t * File = 0; |
441 | for(i = 0; i < FILE_MAX_OPEN; i++) |
426 | for(i = 0; i < FILE_MAX_OPEN; i++) |
442 | { |
427 | { |
443 | if(FilePointer[i].State == FSTATE_UNUSED) // found an unused one |
428 | if(FilePointer[i].State == FSTATE_UNUSED) // found an unused one |
444 | { |
429 | { |
445 | File = &FilePointer[i]; // set pointer to that entry |
430 | File = &FilePointer[i]; // set pointer to that entry |
446 | FilePointer[i].FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
431 | FilePointer[i].FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
447 | FilePointer[i].FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
432 | FilePointer[i].FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
448 | FilePointer[i].FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
433 | FilePointer[i].FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
449 | FilePointer[i].SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
434 | FilePointer[i].SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
450 | FilePointer[i].ByteOfCurrSector = 0; // The byte location within the current sector. |
435 | FilePointer[i].ByteOfCurrSector = 0; // The byte location within the current sector. |
451 | FilePointer[i].Mode = 0; // Mode of fileoperation (read,write) |
436 | FilePointer[i].Mode = 0; // Mode of fileoperation (read,write) |
452 | FilePointer[i].Size = 0; // The size of the opend file in bytes. |
437 | FilePointer[i].Size = 0; // The size of the opend file in bytes. |
453 | FilePointer[i].Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
438 | FilePointer[i].Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
454 | FilePointer[i].DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
439 | FilePointer[i].DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
455 | FilePointer[i].DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
440 | FilePointer[i].DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
456 | FilePointer[i].Attribute = 0; // The attribute of the file opened. |
441 | FilePointer[i].Attribute = 0; // The attribute of the file opened. |
457 | FilePointer[i].SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
442 | FilePointer[i].SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
458 | FilePointer[i].State = FSTATE_USED; // mark it as used |
443 | FilePointer[i].State = FSTATE_USED; // mark it as used |
459 | 444 | ||
460 | break; |
445 | break; |
461 | } |
446 | } |
462 | } |
447 | } |
463 | return(File); |
448 | return(File); |
464 | } |
449 | } |
465 | 450 | ||
466 | /****************************************************************************************************************************************/ |
451 | /****************************************************************************************************************************************/ |
467 | /* Function: UnlockFilePointer(file_t *); */ |
452 | /* Function: UnlockFilePointer(file_t *); */ |
468 | /* */ |
453 | /* */ |
469 | /* Description: This function trys to unlock a file pointer. */ |
454 | /* Description: This function trys to unlock a file pointer. */ |
470 | /* */ |
455 | /* */ |
471 | /* Returnvalue: Returns 1 if file pointer was freed else 0. */ |
456 | /* Returnvalue: Returns 1 if file pointer was freed else 0. */ |
472 | /****************************************************************************************************************************************/ |
457 | /****************************************************************************************************************************************/ |
473 | u8 UnlockFilePointer(File_t * file) |
458 | u8 UnlockFilePointer(File_t * file) |
474 | { |
459 | { |
475 | u8 cnt; |
460 | u8 cnt; |
476 | if(file == NULL) return(0); |
461 | if(file == NULL) return(0); |
477 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
462 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
478 | { |
463 | { |
479 | if(&FilePointer[cnt] == file) // filepointer to be freed found? |
464 | if(&FilePointer[cnt] == file) // filepointer to be freed found? |
480 | { |
465 | { |
481 | file->State = FSTATE_UNUSED; |
466 | file->State = FSTATE_UNUSED; |
482 | file->FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // Sectorpointer to the first sector of the first datacluster of the file. |
467 | file->FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // Sectorpointer to the first sector of the first datacluster of the file. |
483 | file->FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // Pointer to the cluster which is edited at the moment. |
468 | file->FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // Pointer to the cluster which is edited at the moment. |
484 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
469 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
485 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
470 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
486 | file->Mode = 0; // mode of fileoperation (read,write) |
471 | file->Mode = 0; // mode of fileoperation (read,write) |
487 | file->Size = 0; // the size of the opend file in bytes. |
472 | file->Size = 0; // the size of the opend file in bytes. |
488 | file->Position = 0; // pointer to a character within the file 0 < fileposition < filesize |
473 | file->Position = 0; // pointer to a character within the file 0 < fileposition < filesize |
489 | file->SectorInCache = SECTOR_UNDEFINED; // the last sector read, wich is still in the sectorbuffer. |
474 | file->SectorInCache = SECTOR_UNDEFINED; // the last sector read, wich is still in the sectorbuffer. |
490 | file->DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
475 | file->DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
491 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
476 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
492 | file->Attribute = 0; // the attribute of the file opened. |
477 | file->Attribute = 0; // the attribute of the file opened. |
493 | file = NULL; |
478 | file = NULL; |
494 | return(1); |
479 | return(1); |
495 | } |
480 | } |
496 | } |
481 | } |
497 | return(0); |
482 | return(0); |
498 | } |
483 | } |
499 | 484 | ||
500 | /****************************************************************************************************************************************/ |
485 | /****************************************************************************************************************************************/ |
501 | /* Function: s8* SeperateFormatedDirName(const s8*, s8*); */ |
486 | /* Function: s8* SeperateFormatedDirName(const s8*, s8*); */ |
502 | /* */ |
487 | /* */ |
503 | /* Description: This function seperates the first dirname from filepath and brings them */ |
488 | /* Description: This function seperates the first dirname from filepath and brings them */ |
504 | /* into the needed format ('test.txt' -> 'TEST TXT') */ |
489 | /* into the needed format ('test.txt' -> 'TEST TXT') */ |
505 | /* The subpath is the pointer to the remaining substring of the filepath */ |
490 | /* The subpath is the pointer to the remaining substring of the filepath */ |
506 | /* */ |
491 | /* */ |
507 | /* Returnvalue: Return NULL on error or pointer to subpath */ |
492 | /* Returnvalue: Return NULL on error or pointer to subpath */ |
508 | /****************************************************************************************************************************************/ |
493 | /****************************************************************************************************************************************/ |
509 | s8* SeperateFormatedDirName(const s8 *filepath, s8 *dirname) |
494 | s8* SeperateFormatedDirName(const s8 *filepath, s8 *dirname) |
510 | { |
495 | { |
511 | s8* subpath = NULL; |
496 | s8* subpath = NULL; |
512 | u8 readpointer = 0; |
497 | u8 readpointer = 0; |
513 | u8 writepointer = 0; |
498 | u8 writepointer = 0; |
514 | 499 | ||
515 | // search subpath from beginning of filepath |
500 | // search subpath from beginning of filepath |
516 | subpath = NULL; |
501 | subpath = NULL; |
517 | readpointer = 0; |
502 | readpointer = 0; |
518 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
503 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
519 | while(subpath == NULL) // search the filepath until a subpath was found. |
504 | while(subpath == NULL) // search the filepath until a subpath was found. |
520 | { |
505 | { |
521 | if(((filepath[readpointer] == 0) || (filepath[readpointer] == '/'))) // if '/' found or end of filepath reached |
506 | if(((filepath[readpointer] == 0) || (filepath[readpointer] == '/'))) // if '/' found or end of filepath reached |
522 | { |
507 | { |
523 | subpath = (s8*)&filepath[readpointer]; // store the position of the first "/" found after the beginning of the filenpath |
508 | subpath = (s8*)&filepath[readpointer]; // store the position of the first "/" found after the beginning of the filenpath |
524 | } |
509 | } |
525 | readpointer++; |
510 | readpointer++; |
526 | } |
511 | } |
527 | 512 | ||
528 | // clear dirname with spaces |
513 | // clear dirname with spaces |
529 | dirname[11] = 0; // terminate dirname |
514 | dirname[11] = 0; // terminate dirname |
530 | for(writepointer = 0; writepointer < 11; writepointer++) dirname[writepointer] = ' '; |
515 | for(writepointer = 0; writepointer < 11; writepointer++) dirname[writepointer] = ' '; |
531 | 516 | ||
532 | // handle the special dirnames "." and ".." seperately |
517 | // handle the special dirnames "." and ".." seperately |
533 | readpointer = 0; |
518 | readpointer = 0; |
534 | if(filepath[0] == '/') readpointer++; |
519 | if(filepath[0] == '/') readpointer++; |
535 | // if we are trying to enter directories "." or ".." |
520 | // if we are trying to enter directories "." or ".." |
536 | if(filepath[readpointer] == '.') |
521 | if(filepath[readpointer] == '.') |
537 | { |
522 | { |
538 | // directory '.' |
523 | // directory '.' |
539 | if(filepath[readpointer+1] == 0) |
524 | if(filepath[readpointer+1] == 0) |
540 | { |
525 | { |
541 | dirname[0] = '.'; |
526 | dirname[0] = '.'; |
542 | return((s8*)&filepath[readpointer]); |
527 | return((s8*)&filepath[readpointer]); |
543 | } |
528 | } |
544 | // directory '..' |
529 | // directory '..' |
545 | if((filepath[readpointer+1] == '.') && (filepath[readpointer+2] == 0)) |
530 | if((filepath[readpointer+1] == '.') && (filepath[readpointer+2] == 0)) |
546 | { |
531 | { |
547 | dirname[0] = '.'; |
532 | dirname[0] = '.'; |
548 | dirname[1] = '.'; |
533 | dirname[1] = '.'; |
549 | return((s8*)&filepath[readpointer]); |
534 | return((s8*)&filepath[readpointer]); |
550 | } |
535 | } |
551 | } |
536 | } |
552 | 537 | ||
553 | writepointer = 0; |
538 | writepointer = 0; |
554 | // start seperating the dirname from the filepath. |
539 | // start seperating the dirname from the filepath. |
555 | readpointer = 0; |
540 | readpointer = 0; |
556 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
541 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
557 | while( &filepath[readpointer] < subpath) |
542 | while( &filepath[readpointer] < subpath) |
558 | { |
543 | { |
559 | if(writepointer >= 11) return(NULL); // dirname to long |
544 | if(writepointer >= 11) return(NULL); // dirname to long |
560 | if(filepath[readpointer] == '.') // seperating dirname and extension. |
545 | if(filepath[readpointer] == '.') // seperating dirname and extension. |
561 | { |
546 | { |
562 | if(writepointer <= 8) |
547 | if(writepointer <= 8) |
563 | { |
548 | { |
564 | readpointer++; // next character in filename |
549 | readpointer++; // next character in filename |
565 | writepointer = 8; // jump to start of extension |
550 | writepointer = 8; // jump to start of extension |
566 | } |
551 | } |
567 | else return(NULL); // dirbasename to long |
552 | else return(NULL); // dirbasename to long |
568 | } |
553 | } |
569 | else |
554 | else |
570 | { |
555 | { |
571 | if((0x60 < filepath[readpointer]) && (filepath[readpointer] < 0x7B)) |
556 | if((0x60 < filepath[readpointer]) && (filepath[readpointer] < 0x7B)) |
572 | { |
557 | { |
573 | dirname[writepointer] = (filepath[readpointer] - 0x20); // all characters must be upper case. |
558 | dirname[writepointer] = (filepath[readpointer] - 0x20); // all characters must be upper case. |
574 | } |
559 | } |
575 | else |
560 | else |
576 | { |
561 | { |
577 | dirname[writepointer] = filepath[readpointer]; |
562 | dirname[writepointer] = filepath[readpointer]; |
578 | } |
563 | } |
579 | readpointer++; |
564 | readpointer++; |
580 | writepointer++; |
565 | writepointer++; |
581 | } |
566 | } |
582 | } |
567 | } |
583 | return(subpath); |
568 | return(subpath); |
584 | } |
569 | } |
585 | 570 | ||
586 | /**************************************************************************************************************************************+*/ |
571 | /**************************************************************************************************************************************+*/ |
587 | /* Function: Fat16ClusterToSector( u16 cluster); */ |
572 | /* Function: Fat16ClusterToSector( u16 cluster); */ |
588 | /* */ |
573 | /* */ |
589 | /* Description: This function converts a cluster number given by the fat to the corresponding */ |
574 | /* Description: This function converts a cluster number given by the fat to the corresponding */ |
590 | /* sector that points to the start of the data area that is represented by the cluster number. */ |
575 | /* sector that points to the start of the data area that is represented by the cluster number. */ |
591 | /* */ |
576 | /* */ |
592 | /* Returnvalue: The sector number with the data area of the given cluster */ |
577 | /* Returnvalue: The sector number with the data area of the given cluster */ |
593 | /****************************************************************************************************************************************/ |
578 | /****************************************************************************************************************************************/ |
594 | u32 Fat16ClusterToSector(u16 cluster) |
579 | u32 Fat16ClusterToSector(u16 cluster) |
595 | { |
580 | { |
596 | if(!Partition.IsValid) return SECTOR_UNDEFINED; |
581 | if(!Partition.IsValid) return SECTOR_UNDEFINED; |
597 | if ((cluster < 2) || (cluster == CLUSTER_UNDEFINED)) |
582 | if ((cluster < 2) || (cluster == CLUSTER_UNDEFINED)) |
598 | { |
583 | { |
599 | return SECTOR_UNDEFINED; |
584 | return SECTOR_UNDEFINED; |
600 | } |
585 | } |
601 | else |
586 | else |
602 | { |
587 | { |
603 | return ( (cluster - 2) * Partition.SectorsPerCluster) + Partition.FirstDataSector; // the first data sector is represented by the 2nd cluster |
588 | return ( (cluster - 2) * Partition.SectorsPerCluster) + Partition.FirstDataSector; // the first data sector is represented by the 2nd cluster |
604 | } |
589 | } |
605 | } |
590 | } |
606 | 591 | ||
607 | /****************************************************************************************************************************************/ |
592 | /****************************************************************************************************************************************/ |
608 | /* Function: SectorToFat16Cluster( u32 sector); */ |
593 | /* Function: SectorToFat16Cluster( u32 sector); */ |
609 | /* */ |
594 | /* */ |
610 | /* Description: This function converts a given sector number given to the corresponding */ |
595 | /* Description: This function converts a given sector number given to the corresponding */ |
611 | /* cluster number in the fat that represents this data area. */ |
596 | /* cluster number in the fat that represents this data area. */ |
612 | /* */ |
597 | /* */ |
613 | /* Returnvalue: The cluster number representing the data area of the sector. */ |
598 | /* Returnvalue: The cluster number representing the data area of the sector. */ |
614 | /****************************************************************************************************************************************/ |
599 | /****************************************************************************************************************************************/ |
615 | u16 SectorToFat16Cluster(u32 sector) |
600 | u16 SectorToFat16Cluster(u32 sector) |
616 | { |
601 | { |
617 | if(!Partition.IsValid) return CLUSTER_UNDEFINED; |
602 | if(!Partition.IsValid) return CLUSTER_UNDEFINED; |
618 | if((sector == SECTOR_UNDEFINED) || (sector < Partition.FirstDataSector)) return CLUSTER_UNDEFINED; |
603 | if((sector == SECTOR_UNDEFINED) || (sector < Partition.FirstDataSector)) return CLUSTER_UNDEFINED; |
619 | else return ((u16)((sector - Partition.FirstDataSector) / Partition.SectorsPerCluster) + 2); |
604 | else return ((u16)((sector - Partition.FirstDataSector) / Partition.SectorsPerCluster) + 2); |
620 | } |
605 | } |
621 | 606 | ||
622 | 607 | ||
623 | /****************************************************************************************************************************************/ |
608 | /****************************************************************************************************************************************/ |
624 | /* Function: Fat16_IsValid(void); */ |
609 | /* Function: Fat16_IsValid(void); */ |
625 | /* */ |
610 | /* */ |
626 | /* Description: This function return the Fat 16 filesystem state */ |
611 | /* Description: This function return the Fat 16 filesystem state */ |
627 | /* */ |
612 | /* */ |
628 | /* Returnvalue: The function returns "1" on success */ |
613 | /* Returnvalue: The function returns "1" on success */ |
629 | /****************************************************************************************************************************************/ |
614 | /****************************************************************************************************************************************/ |
630 | u8 Fat16_IsValid(void) |
615 | u8 Fat16_IsValid(void) |
631 | { |
616 | { |
632 | return(Partition.IsValid); |
617 | return(Partition.IsValid); |
633 | } |
618 | } |
634 | 619 | ||
635 | /****************************************************************************************************************************************/ |
620 | /****************************************************************************************************************************************/ |
636 | /* Function: Fat16_Deinit(void); */ |
621 | /* Function: Fat16_Deinit(void); */ |
637 | /* */ |
622 | /* */ |
638 | /* Description: This function uninitializes the fat 16 api */ |
623 | /* Description: This function uninitializes the fat 16 api */ |
639 | /* */ |
624 | /* */ |
640 | /* Returnvalue: The function returns "0" on success */ |
625 | /* Returnvalue: The function returns "0" on success */ |
641 | /****************************************************************************************************************************************/ |
626 | /****************************************************************************************************************************************/ |
642 | u8 Fat16_Deinit(void) |
627 | u8 Fat16_Deinit(void) |
643 | { |
628 | { |
644 | s16 returnvalue = 0; |
629 | s16 returnvalue = 0; |
645 | u8 cnt; |
630 | u8 cnt; |
646 | 631 | ||
647 | UART1_PutString("\r\n FAT16 deinit..."); |
632 | UART1_PutString("\r\n FAT16 deinit..."); |
648 | // declare the filepointers as unused. |
633 | // declare the filepointers as unused. |
649 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
634 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
650 | { |
635 | { |
651 | UnlockFilePointer(&FilePointer[cnt]); |
636 | UnlockFilePointer(&FilePointer[cnt]); |
652 | } |
637 | } |
653 | returnvalue = SDC_Deinit(); // uninitialize interface to sd-card |
638 | returnvalue = SDC_Deinit(); // uninitialize interface to sd-card |
654 | Partition.IsValid = 0; // mark data in partition structure as invalid |
639 | Partition.IsValid = 0; // mark data in partition structure as invalid |
655 | Partition.VolumeLabel[0]='\0'; |
640 | Partition.VolumeLabel[0]='\0'; |
656 | UART1_PutString("ok"); |
641 | UART1_PutString("ok"); |
657 | if(SD_WatchDog > 2000) SD_WatchDog = 2000; |
642 | if(SD_WatchDog > 2000) SD_WatchDog = 2000; |
658 | SD_LoggingError = 100; |
643 | SD_LoggingError = 100; |
659 | return(returnvalue); |
644 | return(returnvalue); |
660 | } |
645 | } |
661 | 646 | ||
662 | 647 | ||
663 | /****************************************************************************************************************************************/ |
648 | /****************************************************************************************************************************************/ |
664 | /* Function: Fat16_Init(void); */ |
649 | /* Function: Fat16_Init(void); */ |
665 | /* */ |
650 | /* */ |
666 | /* Description: This function reads the Masterbootrecord and finds the position of the Volumebootrecord, the FAT and the Rootdir */ |
651 | /* Description: This function reads the Masterbootrecord and finds the position of the Volumebootrecord, the FAT and the Rootdir */ |
667 | /* and stores the information in global variables. */ |
652 | /* and stores the information in global variables. */ |
668 | /* */ |
653 | /* */ |
669 | /* Returnvalue: The function returns "0" if the filesystem is initialized. */ |
654 | /* Returnvalue: The function returns "0" if the filesystem is initialized. */ |
670 | /****************************************************************************************************************************************/ |
655 | /****************************************************************************************************************************************/ |
671 | u8 Fat16_Init(void) |
656 | u8 Fat16_Init(void) |
672 | { |
657 | { |
673 | u8 cnt = 0; |
658 | u8 cnt = 0; |
674 | u32 partitionfirstsector; |
659 | u32 partitionfirstsector; |
675 | VBR_Entry_t *VBR; |
660 | VBR_Entry_t *VBR; |
676 | MBR_Entry_t *MBR; |
661 | MBR_Entry_t *MBR; |
677 | File_t *file; |
662 | File_t *file; |
678 | u8 result = 0; |
663 | u8 result = 0; |
679 | 664 | ||
680 | UART1_PutString("\r\n FAT16 init..."); |
665 | UART1_PutString("\r\n FAT16 init..."); |
681 | Partition.IsValid = 0; |
666 | Partition.IsValid = 0; |
682 | // declare the filepointers as unused. |
667 | // declare the filepointers as unused. |
683 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
668 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
684 | { |
669 | { |
685 | UnlockFilePointer(&FilePointer[cnt]); |
670 | UnlockFilePointer(&FilePointer[cnt]); |
686 | } |
671 | } |
687 | // set current file pinter to first position in list |
672 | // set current file pinter to first position in list |
688 | file = &FilePointer[0]; |
673 | file = &FilePointer[0]; |
689 | 674 | ||
690 | // try to initialize the sd-card. |
675 | // try to initialize the sd-card. |
691 | if(SD_SUCCESS != SDC_Init()) |
676 | if(SD_SUCCESS != SDC_Init()) |
692 | { |
677 | { |
693 | UART1_PutString("SD-Card could not be initialized."); |
678 | UART1_PutString("SD-Card could not be initialized."); |
694 | result = 1; |
679 | result = 1; |
695 | goto end; |
680 | goto end; |
696 | } |
681 | } |
697 | 682 | ||
698 | // SD-Card is initialized successfully |
683 | // SD-Card is initialized successfully |
699 | if(SD_SUCCESS != SDC_GetSector((u32)MBR_SECTOR,file->Cache)) // Read the MasterBootRecord |
684 | if(SD_SUCCESS != SDC_GetSector((u32)MBR_SECTOR,file->Cache)) // Read the MasterBootRecord |
700 | { |
685 | { |
701 | UART1_PutString("Error reading the MBR."); |
686 | UART1_PutString("Error reading the MBR."); |
702 | result = 2; |
687 | result = 2; |
703 | goto end; |
688 | goto end; |
704 | } |
689 | } |
705 | MBR = (MBR_Entry_t *)file->Cache; // Enter the MBR using the structure MBR_Entry_t. |
690 | MBR = (MBR_Entry_t *)file->Cache; // Enter the MBR using the structure MBR_Entry_t. |
706 | if((MBR->PartitionEntry1.Type == PART_TYPE_FAT16_ST_32_MB) || |
691 | if((MBR->PartitionEntry1.Type == PART_TYPE_FAT16_ST_32_MB) || |
707 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16_LT_32_MB) || |
692 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16_LT_32_MB) || |
708 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16LBA)) |
693 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16LBA)) |
709 | { |
694 | { |
710 | // get sector offset 1st partition |
695 | // get sector offset 1st partition |
711 | partitionfirstsector = MBR->PartitionEntry1.NoSectorsBeforePartition; |
696 | partitionfirstsector = MBR->PartitionEntry1.NoSectorsBeforePartition; |
712 | // Start of Partition is the Volume Boot Sector |
697 | // Start of Partition is the Volume Boot Sector |
713 | if(SD_SUCCESS != SDC_GetSector(partitionfirstsector,file->Cache)) // Read the volume boot record |
698 | if(SD_SUCCESS != SDC_GetSector(partitionfirstsector,file->Cache)) // Read the volume boot record |
714 | { |
699 | { |
715 | UART1_PutString("Error reading the VBR."); |
700 | UART1_PutString("Error reading the VBR."); |
716 | result = 3; |
701 | result = 3; |
717 | goto end; |
702 | goto end; |
718 | } |
703 | } |
719 | } |
704 | } |
720 | else // maybe the medium has no partition assuming sector 0 is the vbr |
705 | else // maybe the medium has no partition assuming sector 0 is the vbr |
721 | { |
706 | { |
722 | partitionfirstsector = 0; |
707 | partitionfirstsector = 0; |
723 | } |
708 | } |
724 | 709 | ||
725 | VBR = (VBR_Entry_t *) file->Cache; // Enter the VBR using the structure VBR_Entry_t. |
710 | VBR = (VBR_Entry_t *) file->Cache; // Enter the VBR using the structure VBR_Entry_t. |
726 | if(VBR->BytesPerSector != BYTES_PER_SECTOR) |
711 | if(VBR->BytesPerSector != BYTES_PER_SECTOR) |
727 | { |
712 | { |
728 | UART1_PutString("VBR: Sector size not supported."); |
713 | UART1_PutString("VBR: Sector size not supported."); |
729 | result = 4; |
714 | result = 4; |
730 | goto end; |
715 | goto end; |
731 | } |
716 | } |
732 | Partition.SectorsPerCluster = VBR->SectorsPerCluster; // Number of sectors per cluster. Depends on the memorysize of the sd-card. |
717 | Partition.SectorsPerCluster = VBR->SectorsPerCluster; // Number of sectors per cluster. Depends on the memorysize of the sd-card. |
733 | Partition.FatCopies = VBR->NoFATCopies; // Number of fatcopies. |
718 | Partition.FatCopies = VBR->NoFATCopies; // Number of fatcopies. |
734 | Partition.MaxRootEntries = VBR->MaxRootEntries; // How many Entries are possible in the rootdirectory (FAT16 allows max. 512 entries). |
719 | Partition.MaxRootEntries = VBR->MaxRootEntries; // How many Entries are possible in the rootdirectory (FAT16 allows max. 512 entries). |
735 | Partition.SectorsPerFat = VBR->SectorsPerFAT; // The number of sectors per FAT // copy volume label |
720 | Partition.SectorsPerFat = VBR->SectorsPerFAT; // The number of sectors per FAT // copy volume label |
736 | Partition.VolumeLabel[0] = '\0'; // set string terminator |
721 | Partition.VolumeLabel[0] = '\0'; // set string terminator |
737 | 722 | ||
738 | /* Calculate the sectorpositon of the FAT, the Rootdirectory and the first Datacluster. */ |
723 | /* Calculate the sectorpositon of the FAT, the Rootdirectory and the first Datacluster. */ |
739 | // Calculate the position of the FileAllocationTable: |
724 | // Calculate the position of the FileAllocationTable: |
740 | // Start + # of Reserved Sectors |
725 | // Start + # of Reserved Sectors |
741 | Partition.FirstFatSector = (u32)(partitionfirstsector + (u32)(VBR->ReservedSectors)); |
726 | Partition.FirstFatSector = (u32)(partitionfirstsector + (u32)(VBR->ReservedSectors)); |
742 | // Calculate the position of the Rootdirectory: |
727 | // Calculate the position of the Rootdirectory: |
743 | // Start + # of Reserved Sectors + (# of Sectors Per FAT * # of FAT Copies) |
728 | // Start + # of Reserved Sectors + (# of Sectors Per FAT * # of FAT Copies) |
744 | Partition.FirstRootDirSector = Partition.FirstFatSector + (u32)((u32)Partition.SectorsPerFat*(u32)Partition.FatCopies); |
729 | Partition.FirstRootDirSector = Partition.FirstFatSector + (u32)((u32)Partition.SectorsPerFat*(u32)Partition.FatCopies); |
745 | // Calculate the position of the first datacluster: |
730 | // Calculate the position of the first datacluster: |
746 | // Start + # of Reserved + (# of Sectors Per FAT * # of FAT Copies) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
731 | // Start + # of Reserved + (# of Sectors Per FAT * # of FAT Copies) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
747 | Partition.FirstDataSector = Partition.FirstRootDirSector + (u32)(Partition.MaxRootEntries>>4); // assuming 512 Byte Per Sector |
732 | Partition.FirstDataSector = Partition.FirstRootDirSector + (u32)(Partition.MaxRootEntries>>4); // assuming 512 Byte Per Sector |
748 | // Calculate the last data sector |
733 | // Calculate the last data sector |
749 | if(VBR->NoSectors == 0) |
734 | if(VBR->NoSectors == 0) |
750 | { |
735 | { |
751 | UART1_PutString("VBR: Bad number of sectors."); |
736 | UART1_PutString("VBR: Bad number of sectors."); |
752 | result = 5; |
737 | result = 5; |
753 | goto end; |
738 | goto end; |
754 | } |
739 | } |
755 | Partition.LastDataSector = Partition.FirstDataSector + VBR->NoSectors - 1; |
740 | Partition.LastDataSector = Partition.FirstDataSector + VBR->NoSectors - 1; |
756 | // check for FAT16 in VBR of first partition |
741 | // check for FAT16 in VBR of first partition |
757 | if(!((VBR->FATName[0]=='F') && (VBR->FATName[1]=='A') && (VBR->FATName[2]=='T') && (VBR->FATName[3]=='1')&&(VBR->FATName[4]=='6'))) |
742 | if(!((VBR->FATName[0]=='F') && (VBR->FATName[1]=='A') && (VBR->FATName[2]=='T') && (VBR->FATName[3]=='1')&&(VBR->FATName[4]=='6'))) |
758 | { |
743 | { |
759 | UART1_PutString("VBR: Partition ist not FAT16 type."); |
744 | UART1_PutString("VBR: Partition ist not FAT16 type."); |
760 | result = 6; |
745 | result = 6; |
761 | goto end; |
746 | goto end; |
762 | } |
747 | } |
763 | Partition.IsValid = 1; // mark data in partition structure as valid |
748 | Partition.IsValid = 1; // mark data in partition structure as valid |
764 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
749 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
765 | strcpy(Partition.PathToCwd,"/"); |
750 | strcpy(Partition.PathToCwd,"/"); |
766 | result = 0; |
751 | result = 0; |
767 | end: |
752 | end: |
768 | if(result != 0) Fat16_Deinit(); |
753 | if(result != 0) Fat16_Deinit(); |
769 | else UART1_PutString("ok"); |
754 | else UART1_PutString("ok"); |
770 | return(result); |
755 | return(result); |
771 | } |
756 | } |
772 | 757 | ||
773 | 758 | ||
774 | 759 | ||
775 | /****************************************************************************************************************************************/ |
760 | /****************************************************************************************************************************************/ |
776 | /* Function: ClearCurrCluster(File_t*); */ |
761 | /* Function: ClearCurrCluster(File_t*); */ |
777 | /* */ |
762 | /* */ |
778 | /* Description: This function fills the current cluster with 0. */ |
763 | /* Description: This function fills the current cluster with 0. */ |
779 | /* */ |
764 | /* */ |
780 | /* Returnvalue: The function returns 1 on success else 0. */ |
765 | /* Returnvalue: The function returns 1 on success else 0. */ |
781 | /****************************************************************************************************************************************/ |
766 | /****************************************************************************************************************************************/ |
782 | u8 ClearCurrCluster(File_t * file) |
767 | u8 ClearCurrCluster(File_t * file) |
783 | { |
768 | { |
784 | u8 retvalue = 1; |
769 | u8 retvalue = 1; |
785 | u32 i; |
770 | u32 i; |
786 | 771 | ||
787 | if((!Partition.IsValid) || (file == NULL)) return(0); |
772 | if((!Partition.IsValid) || (file == NULL)) return(0); |
788 | 773 | ||
789 | for(i = 0; i < BYTES_PER_SECTOR; i++) file->Cache[i] = 0; // clear file cache |
774 | for(i = 0; i < BYTES_PER_SECTOR; i++) file->Cache[i] = 0; // clear file cache |
790 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return (0); // nothing to do |
775 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return (0); // nothing to do |
791 | for(i = 0; i < Partition.SectorsPerCluster; i++) |
776 | for(i = 0; i < Partition.SectorsPerCluster; i++) |
792 | { |
777 | { |
793 | file->SectorInCache = file->FirstSectorOfCurrCluster + i; |
778 | file->SectorInCache = file->FirstSectorOfCurrCluster + i; |
794 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
779 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
795 | { |
780 | { |
796 | Fat16_Deinit(); |
781 | Fat16_Deinit(); |
797 | return(0); |
782 | return(0); |
798 | } |
783 | } |
799 | } |
784 | } |
800 | return(retvalue); |
785 | return(retvalue); |
801 | } |
786 | } |
802 | 787 | ||
803 | /*****************************************************************************************************************************************/ |
788 | /*****************************************************************************************************************************************/ |
804 | /* Function: GetNextCluster(File_t* ); */ |
789 | /* Function: GetNextCluster(File_t* ); */ |
805 | /* */ |
790 | /* */ |
806 | /* Description: This function finds the next datacluster of the file specified with File *File. */ |
791 | /* Description: This function finds the next datacluster of the file specified with File *File. */ |
807 | /* */ |
792 | /* */ |
808 | /* Returnvalue: The function returns the next cluster or 0 if the last cluster has already reached. */ |
793 | /* Returnvalue: The function returns the next cluster or 0 if the last cluster has already reached. */ |
809 | /*****************************************************************************************************************************************/ |
794 | /*****************************************************************************************************************************************/ |
810 | u16 GetNextCluster(File_t * file) |
795 | u16 GetNextCluster(File_t * file) |
811 | { |
796 | { |
812 | u16 cluster = CLUSTER_UNDEFINED; |
797 | u16 cluster = CLUSTER_UNDEFINED; |
813 | u32 fat_byte_offset, sector, byte; |
798 | u32 fat_byte_offset, sector, byte; |
814 | Fat16Entry_t * fat; |
799 | Fat16Entry_t * fat; |
815 | 800 | ||
816 | if((!Partition.IsValid) || (file == NULL)) return(cluster); |
801 | if((!Partition.IsValid) || (file == NULL)) return(cluster); |
817 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return(cluster); |
802 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return(cluster); |
818 | // if sector is within the data area |
803 | // if sector is within the data area |
819 | if((Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)&& (file->FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
804 | if((Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)&& (file->FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
820 | { |
805 | { |
821 | // determine current file cluster |
806 | // determine current file cluster |
822 | cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); |
807 | cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); |
823 | // calculate byte offset in the fat for corresponding entry |
808 | // calculate byte offset in the fat for corresponding entry |
824 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
809 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
825 | // calculate the sector that contains the current cluster within the fat |
810 | // calculate the sector that contains the current cluster within the fat |
826 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
811 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
827 | // calculate byte offset of the current cluster within that fat sector |
812 | // calculate byte offset of the current cluster within that fat sector |
828 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
813 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
829 | // read this sector to the file cache |
814 | // read this sector to the file cache |
830 | if(file->SectorInCache != sector) |
815 | if(file->SectorInCache != sector) |
831 | { |
816 | { |
832 | file->SectorInCache = sector; // update sector stored in buffer |
817 | file->SectorInCache = sector; // update sector stored in buffer |
833 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
818 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
834 | { |
819 | { |
835 | Fat16_Deinit(); |
820 | Fat16_Deinit(); |
836 | return (CLUSTER_UNDEFINED); |
821 | return (CLUSTER_UNDEFINED); |
837 | } |
822 | } |
838 | } |
823 | } |
839 | // read the next cluster from cache |
824 | // read the next cluster from cache |
840 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
825 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
841 | cluster = fat->NextCluster; |
826 | cluster = fat->NextCluster; |
842 | // if no next cluster exist |
827 | // if no next cluster exist |
843 | if(FAT16_CLUSTER_LAST_MIN <= cluster) |
828 | if(FAT16_CLUSTER_LAST_MIN <= cluster) |
844 | { |
829 | { |
845 | cluster = CLUSTER_UNDEFINED; // next cluster is undefined |
830 | cluster = CLUSTER_UNDEFINED; // next cluster is undefined |
846 | } |
831 | } |
847 | else |
832 | else |
848 | { |
833 | { |
849 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(cluster); |
834 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(cluster); |
850 | file->SectorOfCurrCluster = 0; |
835 | file->SectorOfCurrCluster = 0; |
851 | file->ByteOfCurrSector = 0; |
836 | file->ByteOfCurrSector = 0; |
852 | } |
837 | } |
853 | } |
838 | } |
854 | return(cluster); |
839 | return(cluster); |
855 | } |
840 | } |
856 | 841 | ||
857 | 842 | ||
858 | 843 | ||
859 | /****************************************************************************************************************************************/ |
844 | /****************************************************************************************************************************************/ |
860 | /* Function: FindNextFreeCluster(File_t *); */ |
845 | /* Function: FindNextFreeCluster(File_t *); */ |
861 | /* */ |
846 | /* */ |
862 | /* Description: This function looks in the fat to find the next free cluster */ |
847 | /* Description: This function looks in the fat to find the next free cluster */ |
863 | /* */ |
848 | /* */ |
864 | /* Returnvalue: The function returns the cluster number of the next free cluster found within the fat. */ |
849 | /* Returnvalue: The function returns the cluster number of the next free cluster found within the fat. */ |
865 | /****************************************************************************************************************************************/ |
850 | /****************************************************************************************************************************************/ |
866 | u16 FindNextFreeCluster(File_t *file) |
851 | u16 FindNextFreeCluster(File_t *file) |
867 | { |
852 | { |
868 | u32 fat_sector; // current sector within the fat relative to the first sector of the fat. |
853 | u32 fat_sector; // current sector within the fat relative to the first sector of the fat. |
869 | u32 curr_sector; // current sector |
854 | u32 curr_sector; // current sector |
870 | u16 fat_entry; // index to an fatentry within the actual sector (256 fatentries are possible within one sector). |
855 | u16 fat_entry; // index to an fatentry within the actual sector (256 fatentries are possible within one sector). |
871 | u16 free_cluster = CLUSTER_UNDEFINED; // next free cluster number. |
856 | u16 free_cluster = CLUSTER_UNDEFINED; // next free cluster number. |
872 | Fat16Entry_t * fat; |
857 | Fat16Entry_t * fat; |
873 | 858 | ||
874 | if((!Partition.IsValid) || (file == NULL)) return(0); |
859 | if((!Partition.IsValid) || (file == NULL)) return(0); |
875 | 860 | ||
876 | // start searching for an empty cluster at the beginning of the fat. |
861 | // start searching for an empty cluster at the beginning of the fat. |
877 | fat_sector = 0; |
862 | fat_sector = 0; |
878 | do |
863 | do |
879 | { |
864 | { |
880 | curr_sector = Partition.FirstFatSector + fat_sector; // calculate sector to read |
865 | curr_sector = Partition.FirstFatSector + fat_sector; // calculate sector to read |
881 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
866 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
882 | if( SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector of fat from sd-card. |
867 | if( SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector of fat from sd-card. |
883 | { |
868 | { |
884 | Fat16_Deinit(); |
869 | Fat16_Deinit(); |
885 | return(CLUSTER_UNDEFINED); |
870 | return(CLUSTER_UNDEFINED); |
886 | } |
871 | } |
887 | 872 | ||
888 | fat = (Fat16Entry_t *)file->Cache; // set fat pointer to file cache |
873 | fat = (Fat16Entry_t *)file->Cache; // set fat pointer to file cache |
889 | 874 | ||
890 | for(fat_entry = 0; fat_entry < FAT16_ENTRIES_PER_SECTOR; fat_entry++) // look for an free cluster at all entries in this sector of the fat. |
875 | for(fat_entry = 0; fat_entry < FAT16_ENTRIES_PER_SECTOR; fat_entry++) // look for an free cluster at all entries in this sector of the fat. |
891 | { |
876 | { |
892 | if(fat[fat_entry].NextCluster == FAT16_CLUSTER_FREE) // empty cluster found!! |
877 | if(fat[fat_entry].NextCluster == FAT16_CLUSTER_FREE) // empty cluster found!! |
893 | { |
878 | { |
894 | fat[fat_entry].NextCluster = FAT16_CLUSTER_LAST_MAX; // mark this fat-entry as used |
879 | fat[fat_entry].NextCluster = FAT16_CLUSTER_LAST_MAX; // mark this fat-entry as used |
895 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // and save the sector at the sd-card. |
880 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // and save the sector at the sd-card. |
896 | { |
881 | { |
897 | Fat16_Deinit(); |
882 | Fat16_Deinit(); |
898 | return(CLUSTER_UNDEFINED); |
883 | return(CLUSTER_UNDEFINED); |
899 | } |
884 | } |
900 | free_cluster = (u16)(fat_sector * FAT16_ENTRIES_PER_SECTOR + (u32)fat_entry); |
885 | free_cluster = (u16)(fat_sector * FAT16_ENTRIES_PER_SECTOR + (u32)fat_entry); |
901 | fat_entry = FAT16_ENTRIES_PER_SECTOR; // terminate the search for a free cluster in this sector. |
886 | fat_entry = FAT16_ENTRIES_PER_SECTOR; // terminate the search for a free cluster in this sector. |
902 | } |
887 | } |
903 | } |
888 | } |
904 | fat_sector++; // continue the search in next fat sector |
889 | fat_sector++; // continue the search in next fat sector |
905 | // repeat until the end of the fat is reached and no free cluster has been found so far |
890 | // repeat until the end of the fat is reached and no free cluster has been found so far |
906 | }while((fat_sector < Partition.SectorsPerFat) && (!free_cluster)); |
891 | }while((fat_sector < Partition.SectorsPerFat) && (!free_cluster)); |
907 | return(free_cluster); |
892 | return(free_cluster); |
908 | } |
893 | } |
909 | 894 | ||
910 | /****************************************************************************************************************************************/ |
895 | /****************************************************************************************************************************************/ |
911 | /* Function: u8 DeleteClusterChain(File *file); */ |
896 | /* Function: u8 DeleteClusterChain(File *file); */ |
912 | /* */ |
897 | /* */ |
913 | /* Description: This function trances along a cluster chain in the fat and frees all clusters visited. */ |
898 | /* Description: This function trances along a cluster chain in the fat and frees all clusters visited. */ |
914 | /* */ |
899 | /* */ |
915 | /* Returnvalue: returns 1 in success otherwise 0 */ |
900 | /* Returnvalue: returns 1 in success otherwise 0 */ |
916 | /****************************************************************************************************************************************/ |
901 | /****************************************************************************************************************************************/ |
917 | u8 DeleteClusterChain(u16 StartCluster) |
902 | u8 DeleteClusterChain(u16 StartCluster) |
918 | { |
903 | { |
919 | u16 cluster; |
904 | u16 cluster; |
920 | u32 fat_byte_offset, sector, byte; |
905 | u32 fat_byte_offset, sector, byte; |
921 | Fat16Entry_t * fat; |
906 | Fat16Entry_t * fat; |
922 | u8 buffer[BYTES_PER_SECTOR]; |
907 | u8 buffer[BYTES_PER_SECTOR]; |
923 | u32 sector_in_buffer = 0; |
908 | u32 sector_in_buffer = 0; |
924 | u8 repeat = 0; |
909 | u8 repeat = 0; |
925 | 910 | ||
926 | if(!Partition.IsValid) return(0); |
911 | if(!Partition.IsValid) return(0); |
927 | if(StartCluster == CLUSTER_UNDEFINED) return(1); |
912 | if(StartCluster == CLUSTER_UNDEFINED) return(1); |
928 | cluster = StartCluster; // init chain trace |
913 | cluster = StartCluster; // init chain trace |
929 | // if start cluster is no real cluster |
914 | // if start cluster is no real cluster |
930 | if(FAT16_CLUSTER_LAST_MIN <= cluster) return(1); |
915 | if(FAT16_CLUSTER_LAST_MIN <= cluster) return(1); |
931 | 916 | ||
932 | // calculate byte offset in the fat for corresponding entry |
917 | // calculate byte offset in the fat for corresponding entry |
933 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
918 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
934 | // calculate the sector that contains the current cluster within the fat |
919 | // calculate the sector that contains the current cluster within the fat |
935 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
920 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
936 | // calculate byte offset of the current cluster within that fat sector |
921 | // calculate byte offset of the current cluster within that fat sector |
937 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
922 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
938 | do |
923 | do |
939 | { |
924 | { |
940 | if(sector != sector_in_buffer) |
925 | if(sector != sector_in_buffer) |
941 | { |
926 | { |
942 | // read this sector to buffer |
927 | // read this sector to buffer |
943 | sector_in_buffer = sector; |
928 | sector_in_buffer = sector; |
944 | if(SD_SUCCESS != SDC_GetSector(sector_in_buffer, buffer)) return 0; // read sector from sd-card |
929 | if(SD_SUCCESS != SDC_GetSector(sector_in_buffer, buffer)) return 0; // read sector from sd-card |
945 | } |
930 | } |
946 | // read the next cluster from cache |
931 | // read the next cluster from cache |
947 | fat = (Fat16Entry_t *)(&(buffer[byte])); |
932 | fat = (Fat16Entry_t *)(&(buffer[byte])); |
948 | cluster = fat->NextCluster; |
933 | cluster = fat->NextCluster; |
949 | fat->NextCluster = FAT16_CLUSTER_FREE; // mark current cluster as free |
934 | fat->NextCluster = FAT16_CLUSTER_FREE; // mark current cluster as free |
950 | 935 | ||
951 | if((FAT16_CLUSTER_USED_MIN <= cluster) && (cluster <= FAT16_CLUSTER_USED_MAX) ) |
936 | if((FAT16_CLUSTER_USED_MIN <= cluster) && (cluster <= FAT16_CLUSTER_USED_MAX) ) |
952 | { |
937 | { |
953 | repeat = 1; |
938 | repeat = 1; |
954 | // calculate sector byte and byte offset in the fat for the next cluster |
939 | // calculate sector byte and byte offset in the fat for the next cluster |
955 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
940 | fat_byte_offset = ((u32)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
956 | // calculate the sector that contains the current cluster within the fat |
941 | // calculate the sector that contains the current cluster within the fat |
957 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
942 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
958 | // calculate byte offset of the current cluster within that fat sector |
943 | // calculate byte offset of the current cluster within that fat sector |
959 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
944 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
960 | } |
945 | } |
961 | else repeat = 0; |
946 | else repeat = 0; |
962 | 947 | ||
963 | // if new sector is not the sector in buffer or the last cluster in the chain was traced |
948 | // if new sector is not the sector in buffer or the last cluster in the chain was traced |
964 | if((sector != sector_in_buffer) || !repeat) |
949 | if((sector != sector_in_buffer) || !repeat) |
965 | { // write sector in buffer |
950 | { // write sector in buffer |
966 | if(SD_SUCCESS != SDC_PutSector(sector_in_buffer,buffer)) |
951 | if(SD_SUCCESS != SDC_PutSector(sector_in_buffer,buffer)) |
967 | { |
952 | { |
968 | Fat16_Deinit(); |
953 | Fat16_Deinit(); |
969 | return(0); |
954 | return(0); |
970 | } |
955 | } |
971 | } |
956 | } |
972 | } |
957 | } |
973 | while(repeat); |
958 | while(repeat); |
974 | 959 | ||
975 | return 1; |
960 | return 1; |
976 | } |
961 | } |
977 | 962 | ||
978 | 963 | ||
979 | /****************************************************************************************************************************************/ |
964 | /****************************************************************************************************************************************/ |
980 | /* Function: u16 AppendCluster(File *file); */ |
965 | /* Function: u16 AppendCluster(File *file); */ |
981 | /* */ |
966 | /* */ |
982 | /* Description: This function looks in the fat to find the next free cluster and appends it to the file. */ |
967 | /* Description: This function looks in the fat to find the next free cluster and appends it to the file. */ |
983 | /* */ |
968 | /* */ |
984 | /* Returnvalue: The function returns the appened cluster number or CLUSTER_UNDEFINED of no cluster was appended. */ |
969 | /* Returnvalue: The function returns the appened cluster number or CLUSTER_UNDEFINED of no cluster was appended. */ |
985 | /****************************************************************************************************************************************/ |
970 | /****************************************************************************************************************************************/ |
986 | u16 AppendCluster(File_t *file) |
971 | u16 AppendCluster(File_t *file) |
987 | { |
972 | { |
988 | u16 last_cluster, new_cluster = CLUSTER_UNDEFINED; |
973 | u16 last_cluster, new_cluster = CLUSTER_UNDEFINED; |
989 | u32 fat_byte_offset, sector, byte; |
974 | u32 fat_byte_offset, sector, byte; |
990 | Fat16Entry_t * fat; |
975 | Fat16Entry_t * fat; |
991 | 976 | ||
992 | 977 | ||
993 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
978 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
994 | 979 | ||
995 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
980 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
996 | if(new_cluster != CLUSTER_UNDEFINED) |
981 | if(new_cluster != CLUSTER_UNDEFINED) |
997 | { // A free cluster was found and can be added to the end of the file. |
982 | { // A free cluster was found and can be added to the end of the file. |
998 | // is there at least one cluster appended to the file? |
983 | // is there at least one cluster appended to the file? |
999 | if(file->FirstSectorOfLastCluster == CLUSTER_UNDEFINED) |
984 | if(file->FirstSectorOfLastCluster == CLUSTER_UNDEFINED) |
1000 | { |
985 | { |
1001 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
986 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
1002 | // remember the first sector of the last cluster |
987 | // remember the first sector of the last cluster |
1003 | file->FirstSectorOfLastCluster = file->FirstSectorOfCurrCluster; |
988 | file->FirstSectorOfLastCluster = file->FirstSectorOfCurrCluster; |
1004 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
989 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
1005 | } |
990 | } |
1006 | else |
991 | else |
1007 | { |
992 | { |
1008 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfLastCluster); // determine current file cluster |
993 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfLastCluster); // determine current file cluster |
1009 | } |
994 | } |
1010 | 995 | ||
1011 | if(last_cluster != CLUSTER_UNDEFINED) |
996 | if(last_cluster != CLUSTER_UNDEFINED) |
1012 | { |
997 | { |
1013 | // update FAT entry of last cluster |
998 | // update FAT entry of last cluster |
1014 | fat_byte_offset = ((u32)last_cluster)<<1; |
999 | fat_byte_offset = ((u32)last_cluster)<<1; |
1015 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
1000 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
1016 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
1001 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
1017 | // read the sector containing the last cluster of the file |
1002 | // read the sector containing the last cluster of the file |
1018 | if(file->SectorInCache != sector) |
1003 | if(file->SectorInCache != sector) |
1019 | { |
1004 | { |
1020 | file->SectorInCache = sector; // update sector stored in buffer |
1005 | file->SectorInCache = sector; // update sector stored in buffer |
1021 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
1006 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
1022 | { |
1007 | { |
1023 | Fat16_Deinit(); |
1008 | Fat16_Deinit(); |
1024 | return(0); |
1009 | return(0); |
1025 | } |
1010 | } |
1026 | } |
1011 | } |
1027 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
1012 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
1028 | fat->NextCluster = new_cluster; // append the free cluster to the end of the file in the FAT. |
1013 | fat->NextCluster = new_cluster; // append the free cluster to the end of the file in the FAT. |
1029 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
1014 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
1030 | { |
1015 | { |
1031 | Fat16_Deinit(); |
1016 | Fat16_Deinit(); |
1032 | return(0); |
1017 | return(0); |
1033 | } |
1018 | } |
1034 | // now the new cluster appended to the fat is the last cluster |
1019 | // now the new cluster appended to the fat is the last cluster |
1035 | file->FirstSectorOfLastCluster = Fat16ClusterToSector(new_cluster); |
1020 | file->FirstSectorOfLastCluster = Fat16ClusterToSector(new_cluster); |
1036 | } |
1021 | } |
1037 | else // last cluster of the file is undefined |
1022 | else // last cluster of the file is undefined |
1038 | { // then the new cluster must be the first one of the file |
1023 | { // then the new cluster must be the first one of the file |
1039 | // and its cluster number must be set in the direntry |
1024 | // and its cluster number must be set in the direntry |
1040 | DirEntry_t * dir; |
1025 | DirEntry_t * dir; |
1041 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1026 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1042 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1027 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1043 | { |
1028 | { |
1044 | Fat16_Deinit(); |
1029 | Fat16_Deinit(); |
1045 | return(CLUSTER_UNDEFINED); |
1030 | return(CLUSTER_UNDEFINED); |
1046 | } |
1031 | } |
1047 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1032 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1048 | dir[file->DirectoryIndex].Res1 = 0; |
1033 | dir[file->DirectoryIndex].Res1 = 0; |
1049 | dir[file->DirectoryIndex].Res2[0] = 0; |
1034 | dir[file->DirectoryIndex].Res2[0] = 0; |
1050 | dir[file->DirectoryIndex].Res2[1] = 0; |
1035 | dir[file->DirectoryIndex].Res2[1] = 0; |
1051 | dir[file->DirectoryIndex].StartCluster = new_cluster; // update startcluster |
1036 | dir[file->DirectoryIndex].StartCluster = new_cluster; // update startcluster |
1052 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime);// set time |
1037 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime);// set time |
1053 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime);// and date of modification |
1038 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime);// and date of modification |
1054 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1039 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1055 | dir[file->DirectoryIndex].Size = 0; |
1040 | dir[file->DirectoryIndex].Size = 0; |
1056 | // write sector containing the direntry |
1041 | // write sector containing the direntry |
1057 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1042 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1058 | { |
1043 | { |
1059 | Fat16_Deinit(); |
1044 | Fat16_Deinit(); |
1060 | return(CLUSTER_UNDEFINED); |
1045 | return(CLUSTER_UNDEFINED); |
1061 | } |
1046 | } |
1062 | // update file info |
1047 | // update file info |
1063 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(new_cluster); |
1048 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(new_cluster); |
1064 | file->FirstSectorOfLastCluster = file->FirstSectorOfFirstCluster; |
1049 | file->FirstSectorOfLastCluster = file->FirstSectorOfFirstCluster; |
1065 | file->Size = 0; |
1050 | file->Size = 0; |
1066 | file->Position = 0; |
1051 | file->Position = 0; |
1067 | } |
1052 | } |
1068 | // update file pointes |
1053 | // update file pointes |
1069 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
1054 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
1070 | file->SectorOfCurrCluster = 0; |
1055 | file->SectorOfCurrCluster = 0; |
1071 | file->ByteOfCurrSector = 0; |
1056 | file->ByteOfCurrSector = 0; |
1072 | } |
1057 | } |
1073 | return(new_cluster); |
1058 | return(new_cluster); |
1074 | } |
1059 | } |
1075 | 1060 | ||
1076 | 1061 | ||
1077 | /****************************************************************************************************************************************************/ |
1062 | /****************************************************************************************************************************************************/ |
1078 | /* Function: DirectoryEntryExist(s8 *, u8, u8, File_t *) */ |
1063 | /* Function: DirectoryEntryExist(s8 *, u8, u8, File_t *) */ |
1079 | /* */ |
1064 | /* */ |
1080 | /* Description: This function searches all possible dir entries until the file or directory is found or the end of the directory is reached */ |
1065 | /* Description: This function searches all possible dir entries until the file or directory is found or the end of the directory is reached */ |
1081 | /* */ |
1066 | /* */ |
1082 | /* Returnvalue: This function returns 1 if the directory entry specified was found. */ |
1067 | /* Returnvalue: This function returns 1 if the directory entry specified was found. */ |
1083 | /****************************************************************************************************************************************************/ |
1068 | /****************************************************************************************************************************************************/ |
1084 | u8 DirectoryEntryExist(s8 *dirname, u8 attribfilter, u8 attribmask, File_t *file) |
1069 | u8 DirectoryEntryExist(s8 *dirname, u8 attribfilter, u8 attribmask, File_t *file) |
1085 | { |
1070 | { |
1086 | u32 dir_sector, max_dir_sector, curr_sector; |
1071 | u32 dir_sector, max_dir_sector, curr_sector; |
1087 | u16 dir_entry = 0; |
1072 | u16 dir_entry = 0; |
1088 | 1073 | ||
1089 | u16 end_of_directory_not_reached = 0; |
1074 | u16 end_of_directory_not_reached = 0; |
1090 | u8 i = 0; |
1075 | u8 i = 0; |
1091 | u8 direntry_exist = 0; |
1076 | u8 direntry_exist = 0; |
1092 | DirEntry_t * dir; |
1077 | DirEntry_t * dir; |
1093 | 1078 | ||
1094 | // incomming pointers are useless? |
1079 | // incomming pointers are useless? |
1095 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(direntry_exist); |
1080 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(direntry_exist); |
1096 | 1081 | ||
1097 | // check sector range to be searched |
1082 | // check sector range to be searched |
1098 | 1083 | ||
1099 | // no search area defined? |
1084 | // no search area defined? |
1100 | if(file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED) |
1085 | if(file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED) |
1101 | { |
1086 | { |
1102 | return(direntry_exist); |
1087 | return(direntry_exist); |
1103 | } |
1088 | } |
1104 | //is search area the root? |
1089 | //is search area the root? |
1105 | else if(Partition.FirstRootDirSector == file->FirstSectorOfFirstCluster) |
1090 | else if(Partition.FirstRootDirSector == file->FirstSectorOfFirstCluster) |
1106 | { |
1091 | { |
1107 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; // limit to size of root |
1092 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; // limit to size of root |
1108 | file->DirectorySector = SECTOR_UNDEFINED; // if we have to search within the root, there is no corresponding directory entry available |
1093 | file->DirectorySector = SECTOR_UNDEFINED; // if we have to search within the root, there is no corresponding directory entry available |
1109 | } |
1094 | } |
1110 | // is search area within the data cluster range? |
1095 | // is search area within the data cluster range? |
1111 | else if((Partition.FirstDataSector <= file->FirstSectorOfFirstCluster) && (file->FirstSectorOfFirstCluster <= Partition.LastDataSector)) |
1096 | else if((Partition.FirstDataSector <= file->FirstSectorOfFirstCluster) && (file->FirstSectorOfFirstCluster <= Partition.LastDataSector)) |
1112 | { |
1097 | { |
1113 | max_dir_sector = Partition.SectorsPerCluster; // limit max sectors before next cluster |
1098 | max_dir_sector = Partition.SectorsPerCluster; // limit max sectors before next cluster |
1114 | /* |
1099 | /* |
1115 | //there must be a corresponding directory entry |
1100 | //there must be a corresponding directory entry |
1116 | if(file->DirectorySector == SECTOR_UNDEFINED) |
1101 | if(file->DirectorySector == SECTOR_UNDEFINED) |
1117 | { |
1102 | { |
1118 | return (direntry_exist); |
1103 | return (direntry_exist); |
1119 | } |
1104 | } |
1120 | else // check directory entry |
1105 | else // check directory entry |
1121 | { |
1106 | { |
1122 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1107 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1123 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1108 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1124 | { |
1109 | { |
1125 | Fat16_Deinit(); |
1110 | Fat16_Deinit(); |
1126 | return (direntry_exist); |
1111 | return (direntry_exist); |
1127 | } |
1112 | } |
1128 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1113 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1129 | switch((u8)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1114 | switch((u8)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1130 | { |
1115 | { |
1131 | case SLOT_EMPTY: |
1116 | case SLOT_EMPTY: |
1132 | case SLOT_DELETED: |
1117 | case SLOT_DELETED: |
1133 | // the directrory pointer of this file points to a deleted or not existen directory |
1118 | // the directrory pointer of this file points to a deleted or not existen directory |
1134 | // therefore no file or subdirectory exist here |
1119 | // therefore no file or subdirectory exist here |
1135 | return(direntry_exist); |
1120 | return(direntry_exist); |
1136 | break; |
1121 | break; |
1137 | default: // and is a real directory |
1122 | default: // and is a real directory |
1138 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1123 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1139 | { // current file is not a directory therefore no file or subdirectory can be searched here |
1124 | { // current file is not a directory therefore no file or subdirectory can be searched here |
1140 | return(direntry_exist); |
1125 | return(direntry_exist); |
1141 | } |
1126 | } |
1142 | break; |
1127 | break; |
1143 | } |
1128 | } |
1144 | // check that search area matches directory entry |
1129 | // check that search area matches directory entry |
1145 | if(file->FirstSectorOfFirstCluster != Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster)) |
1130 | if(file->FirstSectorOfFirstCluster != Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster)) |
1146 | { |
1131 | { |
1147 | return (direntry_exist); |
1132 | return (direntry_exist); |
1148 | } |
1133 | } |
1149 | |
1134 | |
1150 | } */ |
1135 | } */ |
1151 | } |
1136 | } |
1152 | else return (direntry_exist); // bad sector range for search area |
1137 | else return (direntry_exist); // bad sector range for search area |
1153 | 1138 | ||
1154 | // update current file data area position to start of first cluster |
1139 | // update current file data area position to start of first cluster |
1155 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1140 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1156 | file->SectorOfCurrCluster = 0; |
1141 | file->SectorOfCurrCluster = 0; |
1157 | file->ByteOfCurrSector = 0; |
1142 | file->ByteOfCurrSector = 0; |
1158 | 1143 | ||
1159 | do // loop over all data clusters of the current directory entry |
1144 | do // loop over all data clusters of the current directory entry |
1160 | { |
1145 | { |
1161 | dir_sector = 0; |
1146 | dir_sector = 0; |
1162 | do // loop over all sectors of a cluster or all sectors of the root directory |
1147 | do // loop over all sectors of a cluster or all sectors of the root directory |
1163 | { |
1148 | { |
1164 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1149 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1165 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
1150 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
1166 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
1151 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
1167 | { |
1152 | { |
1168 | Fat16_Deinit(); |
1153 | Fat16_Deinit(); |
1169 | return(direntry_exist); |
1154 | return(direntry_exist); |
1170 | } |
1155 | } |
1171 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1156 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1172 | // search all directory entries within that sector |
1157 | // search all directory entries within that sector |
1173 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1158 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1174 | { // check for existing dir entry |
1159 | { // check for existing dir entry |
1175 | switch((u8)dir[dir_entry].Name[0]) |
1160 | switch((u8)dir[dir_entry].Name[0]) |
1176 | { |
1161 | { |
1177 | case SLOT_EMPTY: |
1162 | case SLOT_EMPTY: |
1178 | case SLOT_DELETED: |
1163 | case SLOT_DELETED: |
1179 | // ignore empty or deleted dir entries |
1164 | // ignore empty or deleted dir entries |
1180 | break; |
1165 | break; |
1181 | default: |
1166 | default: |
1182 | // if existing check attributes before names are compared will safe performance |
1167 | // if existing check attributes before names are compared will safe performance |
1183 | if ((dir[dir_entry].Attribute & attribmask) != attribfilter) break; // attribute must match |
1168 | if ((dir[dir_entry].Attribute & attribmask) != attribfilter) break; // attribute must match |
1184 | // then compare the name to the giveb dirname (first 11 characters include 8 chars of basename and 3 chars extension.) |
1169 | // then compare the name to the giveb dirname (first 11 characters include 8 chars of basename and 3 chars extension.) |
1185 | i = 0; |
1170 | i = 0; |
1186 | while((i < 11) && (dir[dir_entry].Name[i] == dirname[i])) i++; |
1171 | while((i < 11) && (dir[dir_entry].Name[i] == dirname[i])) i++; |
1187 | if (i < 10) break; // names does not match |
1172 | if (i < 10) break; // names does not match |
1188 | // if dirname and attribute have matched |
1173 | // if dirname and attribute have matched |
1189 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
1174 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
1190 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
1175 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
1191 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1176 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1192 | file->SectorOfCurrCluster = 0; |
1177 | file->SectorOfCurrCluster = 0; |
1193 | file->ByteOfCurrSector = 0; |
1178 | file->ByteOfCurrSector = 0; |
1194 | file->DirectorySector = curr_sector; // current sector |
1179 | file->DirectorySector = curr_sector; // current sector |
1195 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
1180 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
1196 | file->Size = dir[dir_entry].Size; |
1181 | file->Size = dir[dir_entry].Size; |
1197 | direntry_exist = 1; // mark as found |
1182 | direntry_exist = 1; // mark as found |
1198 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1183 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1199 | } // end of first byte of name check |
1184 | } // end of first byte of name check |
1200 | } |
1185 | } |
1201 | dir_sector++; // search next sector |
1186 | dir_sector++; // search next sector |
1202 | // stop if we reached the end of the cluster or the end of the root dir |
1187 | // stop if we reached the end of the cluster or the end of the root dir |
1203 | }while((dir_sector < max_dir_sector) && (!direntry_exist)); |
1188 | }while((dir_sector < max_dir_sector) && (!direntry_exist)); |
1204 | 1189 | ||
1205 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1190 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1206 | if(!direntry_exist && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1191 | if(!direntry_exist && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1207 | { |
1192 | { |
1208 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1193 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1209 | } |
1194 | } |
1210 | }while((end_of_directory_not_reached) && (!direntry_exist)); // repeat until a next cluster exist an no match has been found |
1195 | }while((end_of_directory_not_reached) && (!direntry_exist)); // repeat until a next cluster exist an no match has been found |
1211 | return(direntry_exist); |
1196 | return(direntry_exist); |
1212 | } |
1197 | } |
1213 | 1198 | ||
1214 | 1199 | ||
1215 | /****************************************************************************************************************************************/ |
1200 | /****************************************************************************************************************************************/ |
1216 | /* Function: CreateDirectoryEntry(s8 *, u16, File_t *) */ |
1201 | /* Function: CreateDirectoryEntry(s8 *, u16, File_t *) */ |
1217 | /* */ |
1202 | /* */ |
1218 | /* Description: This function looks for the next free position in the directory and creates an entry. */ |
1203 | /* Description: This function looks for the next free position in the directory and creates an entry. */ |
1219 | /* The type of an directory entry is specified by the file attribute. */ |
1204 | /* The type of an directory entry is specified by the file attribute. */ |
1220 | /* */ |
1205 | /* */ |
1221 | /* Returnvalue: Return 0 on error */ |
1206 | /* Returnvalue: Return 0 on error */ |
1222 | /****************************************************************************************************************************************/ |
1207 | /****************************************************************************************************************************************/ |
1223 | u8 CreateDirectoryEntry(s8 *dirname, u8 attrib, File_t *file) |
1208 | u8 CreateDirectoryEntry(s8 *dirname, u8 attrib, File_t *file) |
1224 | { |
1209 | { |
1225 | u32 dir_sector, max_dir_sector, curr_sector; |
1210 | u32 dir_sector, max_dir_sector, curr_sector; |
1226 | u16 dir_entry = 0; |
1211 | u16 dir_entry = 0; |
1227 | u16 subdircluster, dircluster = 0; |
1212 | u16 subdircluster, dircluster = 0; |
1228 | u16 end_of_directory_not_reached = 0; |
1213 | u16 end_of_directory_not_reached = 0; |
1229 | u8 i = 0; |
1214 | u8 i = 0; |
1230 | u8 retvalue = 0; |
1215 | u8 retvalue = 0; |
1231 | DirEntry_t *dir; |
1216 | DirEntry_t *dir; |
1232 | 1217 | ||
1233 | // incomming pointers are useless? |
1218 | // incomming pointers are useless? |
1234 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(retvalue); |
1219 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(retvalue); |
1235 | 1220 | ||
1236 | // check sector range to be searched |
1221 | // check sector range to be searched |
1237 | 1222 | ||
1238 | // no creation area defined? |
1223 | // no creation area defined? |
1239 | if(file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED) |
1224 | if(file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED) |
1240 | { |
1225 | { |
1241 | return(retvalue); |
1226 | return(retvalue); |
1242 | } |
1227 | } |
1243 | //is creation area the root? |
1228 | //is creation area the root? |
1244 | else if(Partition.FirstRootDirSector == file->FirstSectorOfFirstCluster) |
1229 | else if(Partition.FirstRootDirSector == file->FirstSectorOfFirstCluster) |
1245 | { |
1230 | { |
1246 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; // limit to size of root |
1231 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; // limit to size of root |
1247 | file->DirectorySector = SECTOR_UNDEFINED; // if we have to search within the root, there is no corresponding directory entry available |
1232 | file->DirectorySector = SECTOR_UNDEFINED; // if we have to search within the root, there is no corresponding directory entry available |
1248 | } |
1233 | } |
1249 | // is creation area within the data cluster range? |
1234 | // is creation area within the data cluster range? |
1250 | else if((Partition.FirstDataSector <= file->FirstSectorOfFirstCluster) && (file->FirstSectorOfFirstCluster <= Partition.LastDataSector)) |
1235 | else if((Partition.FirstDataSector <= file->FirstSectorOfFirstCluster) && (file->FirstSectorOfFirstCluster <= Partition.LastDataSector)) |
1251 | { |
1236 | { |
1252 | max_dir_sector = Partition.SectorsPerCluster; // limit max sectors before next cluster |
1237 | max_dir_sector = Partition.SectorsPerCluster; // limit max sectors before next cluster |
1253 | // there must be a corresponding directory entry |
1238 | // there must be a corresponding directory entry |
1254 | if(file->DirectorySector == SECTOR_UNDEFINED) |
1239 | if(file->DirectorySector == SECTOR_UNDEFINED) |
1255 | { |
1240 | { |
1256 | return (retvalue); |
1241 | return (retvalue); |
1257 | } |
1242 | } |
1258 | else // check directory entry |
1243 | else // check directory entry |
1259 | { |
1244 | { |
1260 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1245 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1261 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read in the sector. |
1246 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read in the sector. |
1262 | { |
1247 | { |
1263 | Fat16_Deinit(); |
1248 | Fat16_Deinit(); |
1264 | return (retvalue); |
1249 | return (retvalue); |
1265 | } |
1250 | } |
1266 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1251 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1267 | switch((u8)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1252 | switch((u8)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1268 | { |
1253 | { |
1269 | case SLOT_EMPTY: |
1254 | case SLOT_EMPTY: |
1270 | case SLOT_DELETED: |
1255 | case SLOT_DELETED: |
1271 | // the directrory pointer of this file points to a deleted or not existen directory |
1256 | // the directrory pointer of this file points to a deleted or not existen directory |
1272 | // therefore no file or subdirectory exist here |
1257 | // therefore no file or subdirectory exist here |
1273 | return(retvalue); |
1258 | return(retvalue); |
1274 | break; |
1259 | break; |
1275 | default: // and is a real directory |
1260 | default: // and is a real directory |
1276 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1261 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1277 | { // current file is not a directory therefore no file or subdirectory can be created here |
1262 | { // current file is not a directory therefore no file or subdirectory can be created here |
1278 | return(retvalue); |
1263 | return(retvalue); |
1279 | } |
1264 | } |
1280 | break; |
1265 | break; |
1281 | } |
1266 | } |
1282 | // check that search area matches directory entry |
1267 | // check that search area matches directory entry |
1283 | if(file->FirstSectorOfFirstCluster != Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster)) |
1268 | if(file->FirstSectorOfFirstCluster != Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster)) |
1284 | { |
1269 | { |
1285 | return (retvalue); |
1270 | return (retvalue); |
1286 | } |
1271 | } |
1287 | } |
1272 | } |
1288 | } |
1273 | } |
1289 | else return(retvalue); // bad sector range for search area |
1274 | else return(retvalue); // bad sector range for search area |
1290 | 1275 | ||
1291 | // if the new directory entry is a subdirectory |
1276 | // if the new directory entry is a subdirectory |
1292 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) |
1277 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) |
1293 | { // get a free cluster for its content |
1278 | { // get a free cluster for its content |
1294 | subdircluster = FindNextFreeCluster(file); // get the next free cluster on the disk and mark it as used. |
1279 | subdircluster = FindNextFreeCluster(file); // get the next free cluster on the disk and mark it as used. |
1295 | } |
1280 | } |
1296 | else // a normal file |
1281 | else // a normal file |
1297 | { // has no data cluster after creation |
1282 | { // has no data cluster after creation |
1298 | subdircluster = CLUSTER_UNDEFINED; |
1283 | subdircluster = CLUSTER_UNDEFINED; |
1299 | } |
1284 | } |
1300 | 1285 | ||
1301 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1286 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1302 | file->SectorOfCurrCluster = 0; |
1287 | file->SectorOfCurrCluster = 0; |
1303 | do // loop over all clusters of current directory |
1288 | do // loop over all clusters of current directory |
1304 | { |
1289 | { |
1305 | dir_sector = 0; // reset sector counter within a new cluster |
1290 | dir_sector = 0; // reset sector counter within a new cluster |
1306 | do // loop over all sectors of a cluster or all sectors of the root directory |
1291 | do // loop over all sectors of a cluster or all sectors of the root directory |
1307 | { |
1292 | { |
1308 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1293 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1309 | file->SectorInCache = curr_sector; // update the sector number of file cache. |
1294 | file->SectorInCache = curr_sector; // update the sector number of file cache. |
1310 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1295 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1311 | { |
1296 | { |
1312 | Fat16_Deinit(); |
1297 | Fat16_Deinit(); |
1313 | return(retvalue); |
1298 | return(retvalue); |
1314 | } |
1299 | } |
1315 | 1300 | ||
1316 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1301 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1317 | // search all directory entries of a sector |
1302 | // search all directory entries of a sector |
1318 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1303 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1319 | { // check if current direntry is available |
1304 | { // check if current direntry is available |
1320 | if(((u8)dir[dir_entry].Name[0] == SLOT_EMPTY) || ((u8)dir[dir_entry].Name[0] == SLOT_DELETED)) |
1305 | if(((u8)dir[dir_entry].Name[0] == SLOT_EMPTY) || ((u8)dir[dir_entry].Name[0] == SLOT_DELETED)) |
1321 | { // a free direntry was found |
1306 | { // a free direntry was found |
1322 | for(i = 0; i < 11; i++) dir[dir_entry].Name[i] = dirname[i]; // Set dir name |
1307 | for(i = 0; i < 11; i++) dir[dir_entry].Name[i] = dirname[i]; // Set dir name |
1323 | dir[dir_entry].Attribute = attrib; |
1308 | dir[dir_entry].Attribute = attrib; |
1324 | dir[dir_entry].Res1 = 0; |
1309 | dir[dir_entry].Res1 = 0; |
1325 | dir[dir_entry].CreationTime10ms = (u8)(SystemTime.mSec/10); |
1310 | dir[dir_entry].CreationTime10ms = (u8)(SystemTime.mSec/10); |
1326 | dir[dir_entry].CreationTime = FileTime(&SystemTime); |
1311 | dir[dir_entry].CreationTime = FileTime(&SystemTime); |
1327 | dir[dir_entry].CreationDate = FileDate(&SystemTime); |
1312 | dir[dir_entry].CreationDate = FileDate(&SystemTime); |
1328 | dir[dir_entry].LastAccessDate = dir[dir_entry].CreationDate; |
1313 | dir[dir_entry].LastAccessDate = dir[dir_entry].CreationDate; |
1329 | dir[dir_entry].Res2[0] = 0; |
1314 | dir[dir_entry].Res2[0] = 0; |
1330 | dir[dir_entry].Res2[1] = 0; |
1315 | dir[dir_entry].Res2[1] = 0; |
1331 | dir[dir_entry].ModTime = dir[dir_entry].CreationTime; |
1316 | dir[dir_entry].ModTime = dir[dir_entry].CreationTime; |
1332 | dir[dir_entry].ModDate = dir[dir_entry].CreationDate; |
1317 | dir[dir_entry].ModDate = dir[dir_entry].CreationDate; |
1333 | // Set the attribute of the new directoryentry. |
1318 | // Set the attribute of the new directoryentry. |
1334 | dir[dir_entry].StartCluster = subdircluster; // copy the location of the first datacluster to the directoryentry. |
1319 | dir[dir_entry].StartCluster = subdircluster; // copy the location of the first datacluster to the directoryentry. |
1335 | dir[dir_entry].Size = 0; // the new createted file has no content yet. |
1320 | dir[dir_entry].Size = 0; // the new createted file has no content yet. |
1336 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to card |
1321 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to card |
1337 | { |
1322 | { |
1338 | Fat16_Deinit(); |
1323 | Fat16_Deinit(); |
1339 | return(retvalue); |
1324 | return(retvalue); |
1340 | } |
1325 | } |
1341 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(subdircluster); // Calculate absolute sectorposition of first datacluster. |
1326 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(subdircluster); // Calculate absolute sectorposition of first datacluster. |
1342 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; // Start reading the file with the first sector of the first datacluster. |
1327 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; // Start reading the file with the first sector of the first datacluster. |
1343 | file->SectorOfCurrCluster = 0; // reset sector of cureen cluster |
1328 | file->SectorOfCurrCluster = 0; // reset sector of cureen cluster |
1344 | file->ByteOfCurrSector = 0; // reset the byte location within the current sector |
1329 | file->ByteOfCurrSector = 0; // reset the byte location within the current sector |
1345 | file->Attribute = attrib; // set file attribute to dir attribute |
1330 | file->Attribute = attrib; // set file attribute to dir attribute |
1346 | file->Size = 0; // new file has no size |
1331 | file->Size = 0; // new file has no size |
1347 | file->DirectorySector = curr_sector; |
1332 | file->DirectorySector = curr_sector; |
1348 | file->DirectoryIndex = dir_entry; |
1333 | file->DirectoryIndex = dir_entry; |
1349 | // prepare subdirectory data cluster |
1334 | // prepare subdirectory data cluster |
1350 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) // if a new directory was created then initilize the data area |
1335 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) // if a new directory was created then initilize the data area |
1351 | { |
1336 | { |
1352 | ClearCurrCluster(file); // fill cluster with zeros |
1337 | ClearCurrCluster(file); // fill cluster with zeros |
1353 | file->SectorInCache = file->FirstSectorOfFirstCluster; |
1338 | file->SectorInCache = file->FirstSectorOfFirstCluster; |
1354 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1339 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1355 | { |
1340 | { |
1356 | Fat16_Deinit(); |
1341 | Fat16_Deinit(); |
1357 | return(retvalue); |
1342 | return(retvalue); |
1358 | } |
1343 | } |
1359 | dir = (DirEntry_t *)file->Cache; |
1344 | dir = (DirEntry_t *)file->Cache; |
1360 | // create direntry "." to current dir |
1345 | // create direntry "." to current dir |
1361 | dir[0].Name[0] = 0x2E; |
1346 | dir[0].Name[0] = 0x2E; |
1362 | for(i = 1; i < 11; i++) dir[0].Name[i] = ' '; |
1347 | for(i = 1; i < 11; i++) dir[0].Name[i] = ' '; |
1363 | dir[0].Attribute = ATTR_SUBDIRECTORY; |
1348 | dir[0].Attribute = ATTR_SUBDIRECTORY; |
1364 | dir[0].StartCluster = subdircluster; |
1349 | dir[0].StartCluster = subdircluster; |
1365 | dir[0].Size = 0; |
1350 | dir[0].Size = 0; |
1366 | // create direntry ".." to the upper dir |
1351 | // create direntry ".." to the upper dir |
1367 | dir[1].Name[0] = 0x2E; |
1352 | dir[1].Name[0] = 0x2E; |
1368 | dir[1].Name[1] = 0x2E; |
1353 | dir[1].Name[1] = 0x2E; |
1369 | for(i = 2; i < 11; i++) dir[1].Name[i] = ' '; |
1354 | for(i = 2; i < 11; i++) dir[1].Name[i] = ' '; |
1370 | dir[1].Attribute = ATTR_SUBDIRECTORY; |
1355 | dir[1].Attribute = ATTR_SUBDIRECTORY; |
1371 | dir[1].StartCluster = dircluster; |
1356 | dir[1].StartCluster = dircluster; |
1372 | dir[1].Size = 0; |
1357 | dir[1].Size = 0; |
1373 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// read in the sector. |
1358 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// read in the sector. |
1374 | { |
1359 | { |
1375 | Fat16_Deinit(); |
1360 | Fat16_Deinit(); |
1376 | return(retvalue); |
1361 | return(retvalue); |
1377 | } |
1362 | } |
1378 | } |
1363 | } |
1379 | retvalue = 1; |
1364 | retvalue = 1; |
1380 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1365 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1381 | } |
1366 | } |
1382 | } |
1367 | } |
1383 | dir_sector++; // search next sector |
1368 | dir_sector++; // search next sector |
1384 | // stop if we reached the end of the cluster or the end of the root dir |
1369 | // stop if we reached the end of the cluster or the end of the root dir |
1385 | }while((dir_sector < max_dir_sector) && (!retvalue)); |
1370 | }while((dir_sector < max_dir_sector) && (!retvalue)); |
1386 | 1371 | ||
1387 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1372 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1388 | if(!retvalue && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1373 | if(!retvalue && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1389 | { |
1374 | { |
1390 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1375 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1391 | } |
1376 | } |
1392 | }while((end_of_directory_not_reached) && (!retvalue)); |
1377 | }while((end_of_directory_not_reached) && (!retvalue)); |
1393 | // Perhaps we are at the end of the last cluster of a directory file and have no free direntry found. |
1378 | // Perhaps we are at the end of the last cluster of a directory file and have no free direntry found. |
1394 | // Then we would need to add a cluster to that file and create the new direntry there. |
1379 | // Then we would need to add a cluster to that file and create the new direntry there. |
1395 | // This code is not implemented yet, because its occurs only if more that 32*32=1024 direntries are |
1380 | // This code is not implemented yet, because its occurs only if more that 32*32=1024 direntries are |
1396 | // within a subdirectory of root. |
1381 | // within a subdirectory of root. |
1397 | 1382 | ||
1398 | return(retvalue); // return 1 if file has been created otherwise return 0. |
1383 | return(retvalue); // return 1 if file has been created otherwise return 0. |
1399 | } |
1384 | } |
1400 | 1385 | ||
1401 | /********************************************************************************************************************************************/ |
1386 | /********************************************************************************************************************************************/ |
1402 | /* Function: u8 DeleteDirectoryEntry(File_t *file) */ |
1387 | /* Function: u8 DeleteDirectoryEntry(File_t *file) */ |
1403 | /* Description: This function deletes the directoryentry of the file to be deleted from the filesystem */ |
1388 | /* Description: This function deletes the directoryentry of the file to be deleted from the filesystem */ |
1404 | /* */ |
1389 | /* */ |
1405 | /* */ |
1390 | /* */ |
1406 | /* Returnvalue: 1 on succes and 0 on error */ |
1391 | /* Returnvalue: 1 on succes and 0 on error */ |
1407 | /********************************************************************************************************************************************/ |
1392 | /********************************************************************************************************************************************/ |
1408 | u8 DeleteDirectoryEntry(File_t *file) |
1393 | u8 DeleteDirectoryEntry(File_t *file) |
1409 | { |
1394 | { |
1410 | DirEntry_t *DirectoryEntry = NULL; |
1395 | DirEntry_t *DirectoryEntry = NULL; |
1411 | u8 retval = 0; |
1396 | u8 retval = 0; |
1412 | 1397 | ||
1413 | if((!Partition.IsValid) || (file == NULL)) return (retval); |
1398 | if((!Partition.IsValid) || (file == NULL)) return (retval); |
1414 | // valid directory sector? |
1399 | // valid directory sector? |
1415 | if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.LastDataSector)) |
1400 | if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.LastDataSector)) |
1416 | { |
1401 | { |
1417 | // try to read the sector containing the directory entry of the file to be deleted |
1402 | // try to read the sector containing the directory entry of the file to be deleted |
1418 | if(SD_SUCCESS != SDC_GetSector((u32) file->DirectorySector,file->Cache)) return(retval); |
1403 | if(SD_SUCCESS != SDC_GetSector((u32) file->DirectorySector,file->Cache)) return(retval); |
1419 | // get access to the elements of the directoryentry |
1404 | // get access to the elements of the directoryentry |
1420 | DirectoryEntry = (DirEntry_t *)file->Cache; |
1405 | DirectoryEntry = (DirEntry_t *)file->Cache; |
1421 | // delete the directoryentry |
1406 | // delete the directoryentry |
1422 | DirectoryEntry[file->DirectoryIndex].Name[0] = SLOT_DELETED; |
1407 | DirectoryEntry[file->DirectoryIndex].Name[0] = SLOT_DELETED; |
1423 | DirectoryEntry[file->DirectoryIndex].Attribute = 0; |
1408 | DirectoryEntry[file->DirectoryIndex].Attribute = 0; |
1424 | DirectoryEntry[file->DirectoryIndex].Size = 0; |
1409 | DirectoryEntry[file->DirectoryIndex].Size = 0; |
1425 | // the file has been deleted from the directory, save the modified sector back to the filesystem |
1410 | // the file has been deleted from the directory, save the modified sector back to the filesystem |
1426 | if(SD_SUCCESS == SDC_PutSector((u32) file->DirectorySector,file->Cache)) retval = 1; |
1411 | if(SD_SUCCESS == SDC_PutSector((u32) file->DirectorySector,file->Cache)) retval = 1; |
1427 | } |
1412 | } |
1428 | return(retval); |
1413 | return(retval); |
1429 | } |
1414 | } |
1430 | 1415 | ||
1431 | /********************************************************************************************************************************************/ |
1416 | /********************************************************************************************************************************************/ |
1432 | /* Function: FileExist(const s8* filename, u8 attribfilter, u8 attribmask, File_t *file); */ |
1417 | /* Function: FileExist(const s8* filename, u8 attribfilter, u8 attribmask, File_t *file); */ |
1433 | /* */ |
1418 | /* */ |
1434 | /* Description: This function looks for the specified file including its subdirectories. */ |
1419 | /* Description: This function looks for the specified file including its subdirectories. */ |
1435 | /* If the file is found the Filepointer properties are updated. */ |
1420 | /* If the file is found the Filepointer properties are updated. */ |
1436 | /* */ |
1421 | /* */ |
1437 | /* Returnvalue: 1 if file is found else 0. */ |
1422 | /* Returnvalue: 1 if file is found else 0. */ |
1438 | /********************************************************************************************************************************************/ |
1423 | /********************************************************************************************************************************************/ |
1439 | u8 FileExist(const s8* filename, const u8 attribfilter, const u8 attribmask, File_t *file) |
1424 | u8 FileExist(const s8* filename, const u8 attribfilter, const u8 attribmask, File_t *file) |
1440 | { |
1425 | { |
1441 | s8* path = 0; |
1426 | s8* path = 0; |
1442 | s8* subpath = 0; |
1427 | s8* subpath = 0; |
1443 | u8 af, am, file_exist = 0; |
1428 | u8 af, am, file_exist = 0; |
1444 | s8 dirname[12]; // 8+3 + temination character |
1429 | s8 dirname[12]; // 8+3 + temination character |
1445 | 1430 | ||
1446 | // if incomming pointers are useless return immediatly |
1431 | // if incomming pointers are useless return immediatly |
1447 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1432 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1448 | 1433 | ||
1449 | // trace along the filepath |
1434 | // trace along the filepath |
1450 | path = (s8*)filename; // start at the beginning of the filename string |
1435 | path = (s8*)filename; // start at the beginning of the filename string |
1451 | file->DirectoryIndex = 0; // start search at first dir entry of cluster |
1436 | file->DirectoryIndex = 0; // start search at first dir entry of cluster |
1452 | if(path[0] == '/') // if a path begins with a '/' the search starts at RootDirectory with file search |
1437 | if(path[0] == '/') // if a path begins with a '/' the search starts at RootDirectory with file search |
1453 | { |
1438 | { |
1454 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; // start at RootDirectory with file search |
1439 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; // start at RootDirectory with file search |
1455 | } |
1440 | } |
1456 | else // if a path begins not with a '/' the search starts relative to the CWD |
1441 | else // if a path begins not with a '/' the search starts relative to the CWD |
1457 | { |
1442 | { |
1458 | file->FirstSectorOfFirstCluster = Partition.CurrentWorkingDirectory; |
1443 | file->FirstSectorOfFirstCluster = Partition.CurrentWorkingDirectory; |
1459 | } |
1444 | } |
1460 | // as long as the file was not found and the remaining path is not empty |
1445 | // as long as the file was not found and the remaining path is not empty |
1461 | while((*path != 0) && !file_exist) |
1446 | while((*path != 0) && !file_exist) |
1462 | { // separate dirname and subpath from filepath string |
1447 | { // separate dirname and subpath from filepath string |
1463 | subpath = SeperateFormatedDirName(path, dirname); |
1448 | subpath = SeperateFormatedDirName(path, dirname); |
1464 | if(subpath != NULL) |
1449 | if(subpath != NULL) |
1465 | { |
1450 | { |
1466 | if(*subpath == 0) |
1451 | if(*subpath == 0) |
1467 | { // empty subpath indicates last element of dir chain |
1452 | { // empty subpath indicates last element of dir chain |
1468 | af = attribfilter; |
1453 | af = attribfilter; |
1469 | am = attribmask; |
1454 | am = attribmask; |
1470 | } |
1455 | } |
1471 | else // it must be a subdirectory and no volume label |
1456 | else // it must be a subdirectory and no volume label |
1472 | { |
1457 | { |
1473 | af = ATTR_SUBDIRECTORY; |
1458 | af = ATTR_SUBDIRECTORY; |
1474 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1459 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1475 | } |
1460 | } |
1476 | if(!DirectoryEntryExist(dirname, af, am, file)) |
1461 | if(!DirectoryEntryExist(dirname, af, am, file)) |
1477 | { |
1462 | { |
1478 | return(file_exist); // subdirectory does not exist |
1463 | return(file_exist); // subdirectory does not exist |
1479 | } |
1464 | } |
1480 | else |
1465 | else |
1481 | { |
1466 | { |
1482 | if (*subpath == 0) |
1467 | if (*subpath == 0) |
1483 | { |
1468 | { |
1484 | file_exist = 1; // last element of path chain was found with the given attribute filter |
1469 | file_exist = 1; // last element of path chain was found with the given attribute filter |
1485 | } |
1470 | } |
1486 | } |
1471 | } |
1487 | } |
1472 | } |
1488 | else // error seperating the subpath |
1473 | else // error seperating the subpath |
1489 | { |
1474 | { |
1490 | return(file_exist); // bad subdir format |
1475 | return(file_exist); // bad subdir format |
1491 | } |
1476 | } |
1492 | path = subpath; |
1477 | path = subpath; |
1493 | subpath = 0; |
1478 | subpath = 0; |
1494 | } |
1479 | } |
1495 | return(file_exist); |
1480 | return(file_exist); |
1496 | } |
1481 | } |
1497 | 1482 | ||
1498 | 1483 | ||
1499 | /********************************************************************************************************************************************/ |
1484 | /********************************************************************************************************************************************/ |
1500 | /* Function: FileCreate(const s8* filename, u8 attrib, File_t *file); */ |
1485 | /* Function: FileCreate(const s8* filename, u8 attrib, File_t *file); */ |
1501 | /* */ |
1486 | /* */ |
1502 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1487 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1503 | /* in the rootdirectory of the partition. If the file is found the Filepointer properties are */ |
1488 | /* in the rootdirectory of the partition. If the file is found the Filepointer properties are */ |
1504 | /* updated. If file or its subdirectories are not found they will be created */ |
1489 | /* updated. If file or its subdirectories are not found they will be created */ |
1505 | /* */ |
1490 | /* */ |
1506 | /* Returnvalue: 1 if file was created else 0. */ |
1491 | /* Returnvalue: 1 if file was created else 0. */ |
1507 | /********************************************************************************************************************************************/ |
1492 | /********************************************************************************************************************************************/ |
1508 | u8 FileCreate(const s8* filename, const u8 attrib, File_t *file) |
1493 | u8 FileCreate(const s8* filename, const u8 attrib, File_t *file) |
1509 | { |
1494 | { |
1510 | s8 *path = 0; |
1495 | s8 *path = 0; |
1511 | s8 *subpath = 0; |
1496 | s8 *subpath = 0; |
1512 | u8 af, am, file_created = 0; |
1497 | u8 af, am, file_created = 0; |
1513 | s8 dirname[12]; |
1498 | s8 dirname[12]; |
1514 | s8 txt[60]; |
1499 | s8 txt[60]; |
1515 | u8 i=0; |
1500 | u8 i=0; |
1516 | 1501 | ||
1517 | // if incomming pointers are useless return immediatly |
1502 | // if incomming pointers are useless return immediatly |
1518 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return(0); |
1503 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return(0); |
1519 | 1504 | ||
1520 | // trace along the filepath |
1505 | // trace along the filepath |
1521 | path = (s8*)filename; |
1506 | path = (s8*)filename; |
1522 | 1507 | ||
1523 | if(path[0] == '/') // if a path begins with a '/' the search starts at RootDirectory with file search |
1508 | if(path[0] == '/') // if a path begins with a '/' the search starts at RootDirectory with file search |
1524 | { |
1509 | { |
1525 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; // start at RootDirectory with file search |
1510 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; // start at RootDirectory with file search |
1526 | } |
1511 | } |
1527 | else // if a path begins not with a '/' the search starts relative to the CWD |
1512 | else // if a path begins not with a '/' the search starts relative to the CWD |
1528 | { |
1513 | { |
1529 | file->FirstSectorOfFirstCluster = Partition.CurrentWorkingDirectory; |
1514 | file->FirstSectorOfFirstCluster = Partition.CurrentWorkingDirectory; |
1530 | } |
1515 | } |
1531 | file->DirectoryIndex = 0; |
1516 | file->DirectoryIndex = 0; |
1532 | 1517 | ||
1533 | // as long as the file was not created and the remaining file path is not empty |
1518 | // as long as the file was not created and the remaining file path is not empty |
1534 | while((*path != 0) && !file_created) |
1519 | while((*path != 0) && !file_created) |
1535 | { // separate dirname and subpath from filepath string |
1520 | { // separate dirname and subpath from filepath string |
1536 | subpath = SeperateFormatedDirName(path, dirname); |
1521 | subpath = SeperateFormatedDirName(path, dirname); |
1537 | if(subpath != NULL) |
1522 | if(subpath != NULL) |
1538 | { |
1523 | { |
1539 | if(*subpath == 0) |
1524 | if(*subpath == 0) |
1540 | { // empty subpath indicates last element of dir chain |
1525 | { // empty subpath indicates last element of dir chain |
1541 | af = ATTR_NONE; |
1526 | af = ATTR_NONE; |
1542 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; // any file that is no subdir or volume label |
1527 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; // any file that is no subdir or volume label |
1543 | } |
1528 | } |
1544 | else // it must be a subdirectory but no volume label |
1529 | else // it must be a subdirectory but no volume label |
1545 | { |
1530 | { |
1546 | af = ATTR_SUBDIRECTORY; |
1531 | af = ATTR_SUBDIRECTORY; |
1547 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1532 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1548 | } |
1533 | } |
1549 | if(!DirectoryEntryExist(dirname, af, am, file)) // if subdir or file is not existent |
1534 | if(!DirectoryEntryExist(dirname, af, am, file)) // if subdir or file is not existent |
1550 | { // try to create subdir or file |
1535 | { // try to create subdir or file |
1551 | if(*subpath == 0) af = attrib; // if last element in dir chain take the given attribute |
1536 | if(*subpath == 0) af = attrib; // if last element in dir chain take the given attribute |
1552 | if(!CreateDirectoryEntry(dirname, af, file)) |
1537 | if(!CreateDirectoryEntry(dirname, af, file)) |
1553 | { // could not be created |
1538 | { // could not be created |
1554 | return(file_created); |
1539 | return(file_created); |
1555 | } |
1540 | } |
1556 | else if(*subpath == 0) file_created = 1; // last element of path chain was created |
1541 | else if(*subpath == 0) file_created = 1; // last element of path chain was created |
1557 | } |
1542 | } |
1558 | sprintf(txt+i, "s:%06d",file->FirstSectorOfFirstCluster); |
1543 | sprintf(txt+i, "s:%06d",file->FirstSectorOfFirstCluster); |
1559 | i+=8; |
1544 | i+=8; |
1560 | } |
1545 | } |
1561 | else // error seperating the subpath |
1546 | else // error seperating the subpath |
1562 | { |
1547 | { |
1563 | return(file_created); // bad subdir format |
1548 | return(file_created); // bad subdir format |
1564 | } |
1549 | } |
1565 | path = subpath; |
1550 | path = subpath; |
1566 | subpath = NULL; |
1551 | subpath = NULL; |
1567 | } |
1552 | } |
1568 | Debug(txt); |
1553 | Debug(txt); |
1569 | return(file_created); |
1554 | return(file_created); |
1570 | } |
1555 | } |
1571 | 1556 | ||
1572 | 1557 | ||
1573 | /********************************************************************************************************************************************/ |
1558 | /********************************************************************************************************************************************/ |
1574 | /* Function: void Slashing_Path(s8*) */ |
1559 | /* Function: void Slashing_Path(s8*) */ |
1575 | /* */ |
1560 | /* */ |
1576 | /* Description: This function replaces all \ by / in the string pointed to by the argument */ |
1561 | /* Description: This function replaces all \ by / in the string pointed to by the argument */ |
1577 | /* */ |
1562 | /* */ |
1578 | /* */ |
1563 | /* */ |
1579 | /* Returnvalue: */ |
1564 | /* Returnvalue: */ |
1580 | /********************************************************************************************************************************************/ |
1565 | /********************************************************************************************************************************************/ |
1581 | void Slashing_Path(s8* path) |
1566 | void Slashing_Path(s8* path) |
1582 | { |
1567 | { |
1583 | s8 *cptr = path; |
1568 | s8 *cptr = path; |
1584 | while(*cptr != 0 ) |
1569 | while(*cptr != 0 ) |
1585 | { |
1570 | { |
1586 | if(*cptr == '\\') *cptr = '/'; // replace \ by / |
1571 | if(*cptr == '\\') *cptr = '/'; // replace \ by / |
1587 | cptr++; |
1572 | cptr++; |
1588 | } |
1573 | } |
1589 | } |
1574 | } |
1590 | 1575 | ||
1591 | /********************************************************************************************************************************************/ |
1576 | /********************************************************************************************************************************************/ |
1592 | /* Function: File_t * fopen_(s8* filename, s8 mode); */ |
1577 | /* Function: File_t * fopen_(s8* filename, s8 mode); */ |
1593 | /* */ |
1578 | /* */ |
1594 | /* Description: This function looks for the specified file in the rootdirectory of the drive. If the file is found the number of the */ |
1579 | /* Description: This function looks for the specified file in the rootdirectory of the drive. If the file is found the number of the */ |
1595 | /* corrosponding filepointer is returned. Only modes 'r' (reading), 'w' (writing) and 'a' (append) are implemented yet. */ |
1580 | /* corrosponding filepointer is returned. Only modes 'r' (reading), 'w' (writing) and 'a' (append) are implemented yet. */ |
1596 | /* */ |
1581 | /* */ |
1597 | /* Returnvalue: The filepointer to the file or 0 if faild. */ |
1582 | /* Returnvalue: The filepointer to the file or 0 if faild. */ |
1598 | /********************************************************************************************************************************************/ |
1583 | /********************************************************************************************************************************************/ |
1599 | File_t * fopen_(s8* const filename, const s8 mode) |
1584 | File_t * fopen_(s8* const filename, const s8 mode) |
1600 | { |
1585 | { |
1601 | File_t *file = 0; |
1586 | File_t *file = 0; |
1602 | s8 *cptr; |
1587 | s8 *cptr; |
1603 | 1588 | ||
1604 | if((!Partition.IsValid) || (filename == 0)) return(file); |
1589 | if((!Partition.IsValid) || (filename == 0)) return(file); |
1605 | 1590 | ||
1606 | // Look for an unused filepointer in the file pointer list? |
1591 | // Look for an unused filepointer in the file pointer list? |
1607 | file = LockFilePointer(); |
1592 | file = LockFilePointer(); |
1608 | // if no unused file pointer was found return 0 |
1593 | // if no unused file pointer was found return 0 |
1609 | if(file == NULL) return(file); |
1594 | if(file == NULL) return(file); |
1610 | 1595 | ||
1611 | // now we have found a free filepointer and claimed it |
1596 | // now we have found a free filepointer and claimed it |
1612 | file->Mode = mode; // mode of fileoperation (read,write) |
1597 | file->Mode = mode; // mode of fileoperation (read,write) |
1613 | file->Attribute = 0; // the attribute of the file opened. |
1598 | file->Attribute = 0; // the attribute of the file opened. |
1614 | 1599 | ||
1615 | // bring the path into the correct syntax |
1600 | // bring the path into the correct syntax |
1616 | Slashing_Path(filename); |
1601 | Slashing_Path(filename); |
1617 | cptr = filename; |
1602 | cptr = filename; |
1618 | 1603 | ||
1619 | // check if a real file (no directory) to the given filename exist |
1604 | // check if a real file (no directory) to the given filename exist |
1620 | if(FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file)) |
1605 | if(FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file)) |
1621 | { // file exist |
1606 | { // file exist |
1622 | switch(mode) // check mode |
1607 | switch(mode) // check mode |
1623 | { |
1608 | { |
1624 | case 'a': // if mode is: append to file |
1609 | case 'a': // if mode is: append to file |
1625 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1610 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1626 | { // file is marked as readonly --> do not open this file |
1611 | { // file is marked as readonly --> do not open this file |
1627 | fclose_(file); |
1612 | fclose_(file); |
1628 | file = NULL; |
1613 | file = NULL; |
1629 | } |
1614 | } |
1630 | else |
1615 | else |
1631 | { // file is not marked as read only --> goto end of file |
1616 | { // file is not marked as read only --> goto end of file |
1632 | fseek_(file, 0, SEEK_END); // point to the end of the file |
1617 | fseek_(file, 0, SEEK_END); // point to the end of the file |
1633 | } |
1618 | } |
1634 | break; |
1619 | break; |
1635 | case 'w': // if mode is: write to file |
1620 | case 'w': // if mode is: write to file |
1636 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1621 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1637 | { // file is marked as readonly --> do not open this file |
1622 | { // file is marked as readonly --> do not open this file |
1638 | fclose_(file); |
1623 | fclose_(file); |
1639 | file = NULL; |
1624 | file = NULL; |
1640 | } |
1625 | } |
1641 | else |
1626 | else |
1642 | { // file is not marked as read only |
1627 | { // file is not marked as read only |
1643 | DirEntry_t * dir; |
1628 | DirEntry_t * dir; |
1644 | // free all clusters of that file |
1629 | // free all clusters of that file |
1645 | DeleteClusterChain(SectorToFat16Cluster(file->FirstSectorOfFirstCluster)); |
1630 | DeleteClusterChain(SectorToFat16Cluster(file->FirstSectorOfFirstCluster)); |
1646 | // update directory entry of that file |
1631 | // update directory entry of that file |
1647 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1632 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1648 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1633 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1649 | { |
1634 | { |
1650 | Fat16_Deinit(); |
1635 | Fat16_Deinit(); |
1651 | return(NULL); |
1636 | return(NULL); |
1652 | } |
1637 | } |
1653 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1638 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1654 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime); // set modification time |
1639 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime); // set modification time |
1655 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime); // set modification date |
1640 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime); // set modification date |
1656 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1641 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1657 | dir[file->DirectoryIndex].StartCluster = CLUSTER_UNDEFINED; // update startcluster |
1642 | dir[file->DirectoryIndex].StartCluster = CLUSTER_UNDEFINED; // update startcluster |
1658 | dir[file->DirectoryIndex].Size = 0; |
1643 | dir[file->DirectoryIndex].Size = 0; |
1659 | // write sector containing the direntry |
1644 | // write sector containing the direntry |
1660 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1645 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1661 | { |
1646 | { |
1662 | Fat16_Deinit(); |
1647 | Fat16_Deinit(); |
1663 | return(NULL); |
1648 | return(NULL); |
1664 | } |
1649 | } |
1665 | file->FirstSectorOfFirstCluster = SECTOR_UNDEFINED; |
1650 | file->FirstSectorOfFirstCluster = SECTOR_UNDEFINED; |
1666 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1651 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1667 | file->SectorOfCurrCluster = 0; |
1652 | file->SectorOfCurrCluster = 0; |
1668 | file->ByteOfCurrSector = 0; |
1653 | file->ByteOfCurrSector = 0; |
1669 | file->Size = 0; |
1654 | file->Size = 0; |
1670 | file->Position = 0; |
1655 | file->Position = 0; |
1671 | fseek_(file, 0, SEEK_SET); |
1656 | fseek_(file, 0, SEEK_SET); |
1672 | } |
1657 | } |
1673 | break; |
1658 | break; |
1674 | case 'r': // if mode is: read from file |
1659 | case 'r': // if mode is: read from file |
1675 | // goto end of file |
1660 | // goto end of file |
1676 | fseek_(file, 0, SEEK_SET); |
1661 | fseek_(file, 0, SEEK_SET); |
1677 | break; |
1662 | break; |
1678 | default: // other modes are not supported |
1663 | default: // other modes are not supported |
1679 | fclose_(file); |
1664 | fclose_(file); |
1680 | file = NULL; |
1665 | file = NULL; |
1681 | break; |
1666 | break; |
1682 | } |
1667 | } |
1683 | return(file); |
1668 | return(file); |
1684 | } |
1669 | } |
1685 | else // file does not exist |
1670 | else // file does not exist |
1686 | { |
1671 | { |
1687 | switch(mode) // check mode |
1672 | switch(mode) // check mode |
1688 | { |
1673 | { |
1689 | case 'a': |
1674 | case 'a': |
1690 | case 'w': // if mode is write or append |
1675 | case 'w': // if mode is write or append |
1691 | // try to create the file |
1676 | // try to create the file |
1692 | if(!FileCreate(filename, ATTR_ARCHIVE, file)) |
1677 | if(!FileCreate(filename, ATTR_ARCHIVE, file)) |
1693 | { // if it could not be created |
1678 | { // if it could not be created |
1694 | fclose_(file); |
1679 | fclose_(file); |
1695 | file = NULL; |
1680 | file = NULL; |
1696 | } |
1681 | } |
1697 | break; |
1682 | break; |
1698 | case 'r': // else opened for 'r' |
1683 | case 'r': // else opened for 'r' |
1699 | default: // if unsupported mode |
1684 | default: // if unsupported mode |
1700 | fclose_(file); |
1685 | fclose_(file); |
1701 | file = NULL; |
1686 | file = NULL; |
1702 | break; |
1687 | break; |
1703 | } |
1688 | } |
1704 | return(file); |
1689 | return(file); |
1705 | } |
1690 | } |
1706 | // we should never come to this point |
1691 | // we should never come to this point |
1707 | fclose_(file); |
1692 | fclose_(file); |
1708 | file = NULL; |
1693 | file = NULL; |
1709 | return(file); |
1694 | return(file); |
1710 | } |
1695 | } |
1711 | 1696 | ||
1712 | /****************************************************************************************************************************************************/ |
1697 | /****************************************************************************************************************************************************/ |
1713 | /* Function: s16 fseek_(File_t *, s32 *, u8) */ |
1698 | /* Function: s16 fseek_(File_t *, s32 *, u8) */ |
1714 | /* */ |
1699 | /* */ |
1715 | /* Description: This function sets the pointer of the stream relative to the position */ |
1700 | /* Description: This function sets the pointer of the stream relative to the position */ |
1716 | /* specified by origin (SEEK_SET, SEEK_CUR, SEEK_END) */ |
1701 | /* specified by origin (SEEK_SET, SEEK_CUR, SEEK_END) */ |
1717 | /* Returnvalue: Is 0 if seek was successful */ |
1702 | /* Returnvalue: Is 0 if seek was successful */ |
1718 | /****************************************************************************************************************************************************/ |
1703 | /****************************************************************************************************************************************************/ |
1719 | s16 fseek_(File_t *file, s32 offset, s16 origin) |
1704 | s16 fseek_(File_t *file, s32 offset, s16 origin) |
1720 | { |
1705 | { |
1721 | s32 fposition = 0; |
1706 | s32 fposition = 0; |
1722 | s16 retvalue = 1; |
1707 | s16 retvalue = 1; |
1723 | u32 byte_index = 0; // the byteindex within a sector |
1708 | u32 byte_index = 0; // the byteindex within a sector |
1724 | u32 sector_index = 0; // the sectorindex within a cluster |
1709 | u32 sector_index = 0; // the sectorindex within a cluster |
1725 | u32 cluster_index = 0; // the index of the cluster within the clusterchain inside the fat |
1710 | u32 cluster_index = 0; // the index of the cluster within the clusterchain inside the fat |
1726 | 1711 | ||
1727 | // check if the partition is valid |
1712 | // check if the partition is valid |
1728 | if((!Partition.IsValid) || (file == NULL)) return(retvalue); |
1713 | if((!Partition.IsValid) || (file == NULL)) return(retvalue); |
1729 | switch(origin) |
1714 | switch(origin) |
1730 | { |
1715 | { |
1731 | case SEEK_SET: // Fileposition relative to the beginning of the file. |
1716 | case SEEK_SET: // Fileposition relative to the beginning of the file. |
1732 | fposition = 0; |
1717 | fposition = 0; |
1733 | break; |
1718 | break; |
1734 | case SEEK_END: // Fileposition relative to the end of the file. |
1719 | case SEEK_END: // Fileposition relative to the end of the file. |
1735 | fposition = (s32)file->Size; |
1720 | fposition = (s32)file->Size; |
1736 | break; |
1721 | break; |
1737 | case SEEK_CUR: // Fileposition relative to the current position of the file. |
1722 | case SEEK_CUR: // Fileposition relative to the current position of the file. |
1738 | default: |
1723 | default: |
1739 | fposition = file->Position; |
1724 | fposition = file->Position; |
1740 | break; |
1725 | break; |
1741 | } |
1726 | } |
1742 | 1727 | ||
1743 | // calculate the specified fileposition according to the selected mode |
1728 | // calculate the specified fileposition according to the selected mode |
1744 | fposition += offset; |
1729 | fposition += offset; |
1745 | // is the fileposition within the file? |
1730 | // is the fileposition within the file? |
1746 | if((fposition >= 0) && (fposition <= (s32)file->Size)) |
1731 | if((fposition >= 0) && (fposition <= (s32)file->Size)) |
1747 | { |
1732 | { |
1748 | // initialize the filepointer to start of the file |
1733 | // initialize the filepointer to start of the file |
1749 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1734 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1750 | file->SectorOfCurrCluster = 0; |
1735 | file->SectorOfCurrCluster = 0; |
1751 | file->ByteOfCurrSector = 0; |
1736 | file->ByteOfCurrSector = 0; |
1752 | file->Position = 0; |
1737 | file->Position = 0; |
1753 | // has the specified file at least one valid sector attached? |
1738 | // has the specified file at least one valid sector attached? |
1754 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return(retvalue); |
1739 | if(file->FirstSectorOfCurrCluster == SECTOR_UNDEFINED) return(retvalue); |
1755 | // calculate the absolute number of the sector wich contains the fileposition we are looking for |
1740 | // calculate the absolute number of the sector wich contains the fileposition we are looking for |
1756 | sector_index = (u32) ((u32)fposition >> 9); // 512 bytes per sector |
1741 | sector_index = (u32) ((u32)fposition >> 9); // 512 bytes per sector |
1757 | // calculate the index of the cluster containing the specified sector |
1742 | // calculate the index of the cluster containing the specified sector |
1758 | cluster_index = (u32) sector_index / Partition.SectorsPerCluster; |
1743 | cluster_index = (u32) sector_index / Partition.SectorsPerCluster; |
1759 | // the absolute sectornumber becomes relative to the beginning of the specified cluster |
1744 | // the absolute sectornumber becomes relative to the beginning of the specified cluster |
1760 | sector_index = (sector_index % Partition.SectorsPerCluster); |
1745 | sector_index = (sector_index % Partition.SectorsPerCluster); |
1761 | // calculate the index of the byteposition the fileposition points to |
1746 | // calculate the index of the byteposition the fileposition points to |
1762 | byte_index = (u32) fposition % 512; |
1747 | byte_index = (u32) fposition % 512; |
1763 | // parse the fat till the calculated cluster has been reached |
1748 | // parse the fat till the calculated cluster has been reached |
1764 | while(cluster_index--) GetNextCluster(file); |
1749 | while(cluster_index--) GetNextCluster(file); |
1765 | // set the filepointer to the specified sector and byteposition |
1750 | // set the filepointer to the specified sector and byteposition |
1766 | file->SectorOfCurrCluster = (u8) sector_index; |
1751 | file->SectorOfCurrCluster = (u8) sector_index; |
1767 | file->ByteOfCurrSector = (u16) byte_index; |
1752 | file->ByteOfCurrSector = (u16) byte_index; |
1768 | // the fileposition now equals the filepointer |
1753 | // the fileposition now equals the filepointer |
1769 | file->Position = (u32)fposition; |
1754 | file->Position = (u32)fposition; |
1770 | // the specified fileposition has been reached |
1755 | // the specified fileposition has been reached |
1771 | retvalue = 0; |
1756 | retvalue = 0; |
1772 | } |
1757 | } |
1773 | return(retvalue); |
1758 | return(retvalue); |
1774 | } |
1759 | } |
1775 | 1760 | ||
1776 | /****************************************************************************************************************************************************/ |
1761 | /****************************************************************************************************************************************************/ |
1777 | /* Function: fflush_(File *); */ |
1762 | /* Function: fflush_(File *); */ |
1778 | /* */ |
1763 | /* */ |
1779 | /* Description: This function writes the data already in the buffer but not yet written to the file. */ |
1764 | /* Description: This function writes the data already in the buffer but not yet written to the file. */ |
1780 | /* */ |
1765 | /* */ |
1781 | /* Returnvalue: 0 on success EOF on error */ |
1766 | /* Returnvalue: 0 on success EOF on error */ |
1782 | /****************************************************************************************************************************************************/ |
1767 | /****************************************************************************************************************************************************/ |
1783 | s16 fflush_(File_t *file) |
1768 | s16 fflush_(File_t *file) |
1784 | { |
1769 | { |
1785 | DirEntry_t *dir; |
1770 | DirEntry_t *dir; |
1786 | 1771 | ||
1787 | if((file == NULL) || (!Partition.IsValid)) return (EOF); |
1772 | if((file == NULL) || (!Partition.IsValid)) return (EOF); |
1788 | 1773 | ||
1789 | switch(file->Mode) |
1774 | switch(file->Mode) |
1790 | { |
1775 | { |
1791 | case 'a': |
1776 | case 'a': |
1792 | case 'w': |
1777 | case 'w': |
1793 | if(file->ByteOfCurrSector > 0) // has data been added to the file? |
1778 | if(file->ByteOfCurrSector > 0) // has data been added to the file? |
1794 | { |
1779 | { |
1795 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// save the data still in the buffer |
1780 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// save the data still in the buffer |
1796 | { |
1781 | { |
1797 | Fat16_Deinit(); |
1782 | Fat16_Deinit(); |
1798 | return(EOF); |
1783 | return(EOF); |
1799 | } |
1784 | } |
1800 | } |
1785 | } |
1801 | file->SectorInCache = file->DirectorySector; |
1786 | file->SectorInCache = file->DirectorySector; |
1802 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read the directory entry for this file. |
1787 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read the directory entry for this file. |
1803 | { |
1788 | { |
1804 | Fat16_Deinit(); |
1789 | Fat16_Deinit(); |
1805 | return(EOF); |
1790 | return(EOF); |
1806 | } |
1791 | } |
1807 | 1792 | ||
1808 | dir = (DirEntry_t *)file->Cache; |
1793 | dir = (DirEntry_t *)file->Cache; |
1809 | // update file size and modification time & date |
1794 | // update file size and modification time & date |
1810 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime); |
1795 | dir[file->DirectoryIndex].ModTime = FileTime(&SystemTime); |
1811 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime); |
1796 | dir[file->DirectoryIndex].ModDate = FileDate(&SystemTime); |
1812 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1797 | dir[file->DirectoryIndex].LastAccessDate = dir[file->DirectoryIndex].ModDate; |
1813 | dir[file->DirectoryIndex].Size = file->Size; // update file size |
1798 | dir[file->DirectoryIndex].Size = file->Size; // update file size |
1814 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to sd-card |
1799 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to sd-card |
1815 | { |
1800 | { |
1816 | Fat16_Deinit(); |
1801 | Fat16_Deinit(); |
1817 | return(EOF); |
1802 | return(EOF); |
1818 | } |
1803 | } |
1819 | break; |
1804 | break; |
1820 | case 'r': |
1805 | case 'r': |
1821 | default: |
1806 | default: |
1822 | // do nothing! |
1807 | // do nothing! |
1823 | return(EOF); |
1808 | return(EOF); |
1824 | break; |
1809 | break; |
1825 | 1810 | ||
1826 | } |
1811 | } |
1827 | return(0); |
1812 | return(0); |
1828 | } |
1813 | } |
1829 | 1814 | ||
1830 | /********************************************************************************************************************************************/ |
1815 | /********************************************************************************************************************************************/ |
1831 | /* Function: fgetc_(File *file); */ |
1816 | /* Function: fgetc_(File *file); */ |
1832 | /* */ |
1817 | /* */ |
1833 | /* Description: This function reads and returns one character from the specified file. Is the end of the actual sector reached the */ |
1818 | /* Description: This function reads and returns one character from the specified file. Is the end of the actual sector reached the */ |
1834 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1819 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1835 | /* */ |
1820 | /* */ |
1836 | /* Returnvalue: The function returns the character read from the specified memorylocation as u8 casted to s16 or EOF. */ |
1821 | /* Returnvalue: The function returns the character read from the specified memorylocation as u8 casted to s16 or EOF. */ |
1837 | /********************************************************************************************************************************************/ |
1822 | /********************************************************************************************************************************************/ |
1838 | s16 fgetc_(File_t *file) |
1823 | s16 fgetc_(File_t *file) |
1839 | { |
1824 | { |
1840 | s16 c = EOF; |
1825 | s16 c = EOF; |
1841 | u32 curr_sector; |
1826 | u32 curr_sector; |
1842 | 1827 | ||
1843 | if( (!Partition.IsValid) || (file == NULL)) return(c); |
1828 | if( (!Partition.IsValid) || (file == NULL)) return(c); |
1844 | // if the end of the file is not reached, get the next character. |
1829 | // if the end of the file is not reached, get the next character. |
1845 | if((0 < file->Size) && ((file->Position) < file->Size) ) |
1830 | if((0 < file->Size) && ((file->Position) < file->Size) ) |
1846 | { |
1831 | { |
1847 | curr_sector = file->FirstSectorOfCurrCluster; // calculate the sector of the next character to be read. |
1832 | curr_sector = file->FirstSectorOfCurrCluster; // calculate the sector of the next character to be read. |
1848 | curr_sector += file->SectorOfCurrCluster; |
1833 | curr_sector += file->SectorOfCurrCluster; |
1849 | 1834 | ||
1850 | if(file->SectorInCache != curr_sector) |
1835 | if(file->SectorInCache != curr_sector) |
1851 | { |
1836 | { |
1852 | file->SectorInCache = curr_sector; |
1837 | file->SectorInCache = curr_sector; |
1853 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache,file->Cache)) |
1838 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache,file->Cache)) |
1854 | { |
1839 | { |
1855 | Fat16_Deinit(); |
1840 | Fat16_Deinit(); |
1856 | return(EOF); |
1841 | return(EOF); |
1857 | } |
1842 | } |
1858 | } |
1843 | } |
1859 | c = (s16) file->Cache[file->ByteOfCurrSector]; |
1844 | c = (s16) file->Cache[file->ByteOfCurrSector]; |
1860 | file->Position++; // increment file position |
1845 | file->Position++; // increment file position |
1861 | file->ByteOfCurrSector++; // goto next byte in sector |
1846 | file->ByteOfCurrSector++; // goto next byte in sector |
1862 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if end of sector |
1847 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if end of sector |
1863 | { |
1848 | { |
1864 | file->ByteOfCurrSector = 0; // reset byte location |
1849 | file->ByteOfCurrSector = 0; // reset byte location |
1865 | file->SectorOfCurrCluster++; // next sector |
1850 | file->SectorOfCurrCluster++; // next sector |
1866 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1851 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1867 | { |
1852 | { |
1868 | 1853 | ||
1869 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1854 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1870 | { |
1855 | { |
1871 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1856 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1872 | } |
1857 | } |
1873 | else // the last cluster was allready reached |
1858 | else // the last cluster was allready reached |
1874 | { |
1859 | { |
1875 | file->SectorOfCurrCluster--; // jump back to the last sector in the last cluster |
1860 | file->SectorOfCurrCluster--; // jump back to the last sector in the last cluster |
1876 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
1861 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
1877 | } |
1862 | } |
1878 | } |
1863 | } |
1879 | } |
1864 | } |
1880 | } |
1865 | } |
1881 | return(c); |
1866 | return(c); |
1882 | } |
1867 | } |
1883 | 1868 | ||
1884 | /********************************************************************************************************************************************/ |
1869 | /********************************************************************************************************************************************/ |
1885 | /* Function: fputc_( const s8 c, File *file); */ |
1870 | /* Function: fputc_( const s8 c, File *file); */ |
1886 | /* */ |
1871 | /* */ |
1887 | /* Description: This function writes a byte to the specified file and takes care of writing the necessary FAT- Entries. */ |
1872 | /* Description: This function writes a byte to the specified file and takes care of writing the necessary FAT- Entries. */ |
1888 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1873 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1889 | /* */ |
1874 | /* */ |
1890 | /* Returnvalue: The function returns the character written to the stream or EOF on error. */ |
1875 | /* Returnvalue: The function returns the character written to the stream or EOF on error. */ |
1891 | /********************************************************************************************************************************************/ |
1876 | /********************************************************************************************************************************************/ |
1892 | s16 fputc_(const s8 c, File_t *file) |
1877 | s16 fputc_(const s8 c, File_t *file) |
1893 | { |
1878 | { |
1894 | u32 curr_sector = 0; |
1879 | u32 curr_sector = 0; |
1895 | 1880 | ||
1896 | if((!Partition.IsValid) || (file == NULL)) return(EOF); |
1881 | if((!Partition.IsValid) || (file == NULL)) return(EOF); |
1897 | switch(file->Mode) |
1882 | switch(file->Mode) |
1898 | { |
1883 | { |
1899 | case 'w': |
1884 | case 'w': |
1900 | case 'a': |
1885 | case 'a': |
1901 | // If file position equals to file size, then the end of file has been reached. |
1886 | // If file position equals to file size, then the end of file has been reached. |
1902 | // In this case it has to be checked that the ByteOfCurrSector is BYTES_PER_SECTOR |
1887 | // In this case it has to be checked that the ByteOfCurrSector is BYTES_PER_SECTOR |
1903 | // and a new cluster should be appended. |
1888 | // and a new cluster should be appended. |
1904 | // If the first sector of first cluster is unvalid, then the file claims no data clusters |
1889 | // If the first sector of first cluster is unvalid, then the file claims no data clusters |
1905 | // and size should be zero, therefore append a new Cluster too. |
1890 | // and size should be zero, therefore append a new Cluster too. |
1906 | if(((file->Position >= file->Size) && (file->ByteOfCurrSector >= BYTES_PER_SECTOR)) || (file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED)) |
1891 | if(((file->Position >= file->Size) && (file->ByteOfCurrSector >= BYTES_PER_SECTOR)) || (file->FirstSectorOfFirstCluster == SECTOR_UNDEFINED)) |
1907 | { |
1892 | { |
1908 | if(CLUSTER_UNDEFINED == AppendCluster(file)) return(EOF); |
1893 | if(CLUSTER_UNDEFINED == AppendCluster(file)) return(EOF); |
1909 | } |
1894 | } |
1910 | 1895 | ||
1911 | curr_sector = file->FirstSectorOfCurrCluster; |
1896 | curr_sector = file->FirstSectorOfCurrCluster; |
1912 | curr_sector += file->SectorOfCurrCluster; |
1897 | curr_sector += file->SectorOfCurrCluster; |
1913 | if(file->SectorInCache != curr_sector) |
1898 | if(file->SectorInCache != curr_sector) |
1914 | { |
1899 | { |
1915 | file->SectorInCache = curr_sector; |
1900 | file->SectorInCache = curr_sector; |
1916 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) |
1901 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) |
1917 | { |
1902 | { |
1918 | Fat16_Deinit(); |
1903 | Fat16_Deinit(); |
1919 | return(EOF); |
1904 | return(EOF); |
1920 | } |
1905 | } |
1921 | } |
1906 | } |
1922 | 1907 | ||
1923 | file->Cache[file->ByteOfCurrSector] = (u8)c; // write databyte into the buffer. The byte will be written to the device at once |
1908 | file->Cache[file->ByteOfCurrSector] = (u8)c; // write databyte into the buffer. The byte will be written to the device at once |
1924 | if(file->Size == file->Position) file->Size++; // a character has been written to the file so the size is incremented only when the character has been added at the end of the file. |
1909 | if(file->Size == file->Position) file->Size++; // a character has been written to the file so the size is incremented only when the character has been added at the end of the file. |
1925 | file->Position++; // the actual positon within the file. |
1910 | file->Position++; // the actual positon within the file. |
1926 | file->ByteOfCurrSector++; // goto next byte in sector |
1911 | file->ByteOfCurrSector++; // goto next byte in sector |
1927 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
1912 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
1928 | { // save the sector to the sd-card |
1913 | { // save the sector to the sd-card |
1929 | 1914 | ||
1930 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1915 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1931 | { |
1916 | { |
1932 | Fat16_Deinit(); |
1917 | Fat16_Deinit(); |
1933 | return(EOF); |
1918 | return(EOF); |
1934 | } |
1919 | } |
1935 | file->ByteOfCurrSector = 0; // reset byte location |
1920 | file->ByteOfCurrSector = 0; // reset byte location |
1936 | file->SectorOfCurrCluster++; // next sector |
1921 | file->SectorOfCurrCluster++; // next sector |
1937 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster)// if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1922 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster)// if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1938 | { |
1923 | { |
1939 | if(!GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1924 | if(!GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1940 | { // if current cluster was the last cluster of the file |
1925 | { // if current cluster was the last cluster of the file |
1941 | if(!AppendCluster(file)) // append a new and free cluster at the end of the file. |
1926 | if(!AppendCluster(file)) // append a new and free cluster at the end of the file. |
1942 | { |
1927 | { |
1943 | file->SectorOfCurrCluster--; // jump back to last sector of last cluster |
1928 | file->SectorOfCurrCluster--; // jump back to last sector of last cluster |
1944 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set byte location to 1 byte over sector len |
1929 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set byte location to 1 byte over sector len |
1945 | return(EOF); |
1930 | return(EOF); |
1946 | } |
1931 | } |
1947 | } |
1932 | } |
1948 | else // next cluster |
1933 | else // next cluster |
1949 | { |
1934 | { |
1950 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1935 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1951 | } |
1936 | } |
1952 | } |
1937 | } |
1953 | } |
1938 | } |
1954 | break; |
1939 | break; |
1955 | case 'r': |
1940 | case 'r': |
1956 | default: |
1941 | default: |
1957 | return(EOF); |
1942 | return(EOF); |
1958 | break; |
1943 | break; |
1959 | } // EOF switch(file->Mode) |
1944 | } // EOF switch(file->Mode) |
1960 | return(0); |
1945 | return(0); |
1961 | } |
1946 | } |
1962 | 1947 | ||
1963 | 1948 | ||
1964 | /****************************************************************************************************************************************/ |
1949 | /****************************************************************************************************************************************/ |
1965 | /* Function: fread_(void *buffer, s32 size, s32 count, File *File); */ |
1950 | /* Function: fread_(void *buffer, s32 size, s32 count, File *File); */ |
1966 | /* */ |
1951 | /* */ |
1967 | /* Description: This function reads count objects of the specified size */ |
1952 | /* Description: This function reads count objects of the specified size */ |
1968 | /* from the actual position of the file to the specified buffer. */ |
1953 | /* from the actual position of the file to the specified buffer. */ |
1969 | /* */ |
1954 | /* */ |
1970 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1955 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1971 | /****************************************************************************************************************************************/ |
1956 | /****************************************************************************************************************************************/ |
1972 | u32 fread_(void *buffer, u32 size, u32 count, File_t *file) |
1957 | u32 fread_(void *buffer, u32 size, u32 count, File_t *file) |
1973 | { |
1958 | { |
1974 | u32 object_cnt = 0; // count the number of objects read from the file. |
1959 | u32 object_cnt = 0; // count the number of objects read from the file. |
1975 | u32 object_size = 0; // count the number of bytes read from the actual object. |
1960 | u32 object_size = 0; // count the number of bytes read from the actual object. |
1976 | u8 *pbuff = 0; // a pointer to the actual bufferposition. |
1961 | u8 *pbuff = 0; // a pointer to the actual bufferposition. |
1977 | u8 success = 1; // no error occured during read operation to the file. |
1962 | u8 success = 1; // no error occured during read operation to the file. |
1978 | s16 c; |
1963 | s16 c; |
1979 | 1964 | ||
1980 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1965 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1981 | 1966 | ||
1982 | pbuff = (u8 *) buffer; // cast the void pointer to an u8 * |
1967 | pbuff = (u8 *) buffer; // cast the void pointer to an u8 * |
1983 | 1968 | ||
1984 | while((object_cnt < count) && success) |
1969 | while((object_cnt < count) && success) |
1985 | { |
1970 | { |
1986 | object_size = size; |
1971 | object_size = size; |
1987 | while((size > 0) && success) |
1972 | while((size > 0) && success) |
1988 | { |
1973 | { |
1989 | c = fgetc_(file); |
1974 | c = fgetc_(file); |
1990 | if(c != EOF) |
1975 | if(c != EOF) |
1991 | { |
1976 | { |
1992 | *pbuff = (u8)c; // read a byte from the buffer to the opened file. |
1977 | *pbuff = (u8)c; // read a byte from the buffer to the opened file. |
1993 | pbuff++; |
1978 | pbuff++; |
1994 | size--; |
1979 | size--; |
1995 | } |
1980 | } |
1996 | else // error or end of file reached |
1981 | else // error or end of file reached |
1997 | { |
1982 | { |
1998 | success = 0; |
1983 | success = 0; |
1999 | } |
1984 | } |
2000 | } |
1985 | } |
2001 | if(success) object_cnt++; |
1986 | if(success) object_cnt++; |
2002 | } |
1987 | } |
2003 | return(object_cnt); // return the number of objects succesfully read from the file |
1988 | return(object_cnt); // return the number of objects succesfully read from the file |
2004 | } |
1989 | } |
2005 | 1990 | ||
2006 | 1991 | ||
2007 | /****************************************************************************************************************************************/ |
1992 | /****************************************************************************************************************************************/ |
2008 | /* Function: fwrite_(void *buffer, s32 size, s32 count, File *file); */ |
1993 | /* Function: fwrite_(void *buffer, s32 size, s32 count, File *file); */ |
2009 | /* */ |
1994 | /* */ |
2010 | /* Description: This function writes count objects of the specified size */ |
1995 | /* Description: This function writes count objects of the specified size */ |
2011 | /* from the buffer pointer to the actual position in the file. */ |
1996 | /* from the buffer pointer to the actual position in the file. */ |
2012 | /* */ |
1997 | /* */ |
2013 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1998 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
2014 | /****************************************************************************************************************************************/ |
1999 | /****************************************************************************************************************************************/ |
2015 | u32 fwrite_(void *buffer, u32 size, u32 count, File_t *file) |
2000 | u32 fwrite_(void *buffer, u32 size, u32 count, File_t *file) |
2016 | { |
2001 | { |
2017 | u32 object_cnt = 0; // count the number of objects written to the file. |
2002 | u32 object_cnt = 0; // count the number of objects written to the file. |
2018 | u32 object_size = 0; // count the number of bytes written from the actual object. |
2003 | u32 object_size = 0; // count the number of bytes written from the actual object. |
2019 | u8 *pbuff = 0; // a pointer to the actual bufferposition. |
2004 | u8 *pbuff = 0; // a pointer to the actual bufferposition. |
2020 | u8 success = 1; // no error occured during write operation to the file. |
2005 | u8 success = 1; // no error occured during write operation to the file. |
2021 | s16 c; |
2006 | s16 c; |
2022 | 2007 | ||
2023 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
2008 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
2024 | if(file->Mode == 'r') return (0); // opened read only |
2009 | if(file->Mode == 'r') return (0); // opened read only |
2025 | pbuff = (u8 *) buffer; // cast the void pointer to an u8 * |
2010 | pbuff = (u8 *) buffer; // cast the void pointer to an u8 * |
2026 | 2011 | ||
2027 | while((object_cnt < count) && success) |
2012 | while((object_cnt < count) && success) |
2028 | { |
2013 | { |
2029 | object_size = size; |
2014 | object_size = size; |
2030 | while((size > 0) && success) |
2015 | while((size > 0) && success) |
2031 | { |
2016 | { |
2032 | c = fputc_(*pbuff, file); // write a byte from the buffer to the opened file. |
2017 | c = fputc_(*pbuff, file); // write a byte from the buffer to the opened file. |
2033 | if(c != EOF) |
2018 | if(c != EOF) |
2034 | { |
2019 | { |
2035 | pbuff++; |
2020 | pbuff++; |
2036 | size--; |
2021 | size--; |
2037 | } |
2022 | } |
2038 | else |
2023 | else |
2039 | { |
2024 | { |
2040 | success = 0; |
2025 | success = 0; |
2041 | } |
2026 | } |
2042 | } |
2027 | } |
2043 | if(success) object_cnt++; |
2028 | if(success) object_cnt++; |
2044 | } |
2029 | } |
2045 | 2030 | ||
2046 | return(object_cnt); // return the number of objects succesfully written to the file |
2031 | return(object_cnt); // return the number of objects succesfully written to the file |
2047 | } |
2032 | } |
2048 | 2033 | ||
2049 | 2034 | ||
2050 | /****************************************************************************************************************************************/ |
2035 | /****************************************************************************************************************************************/ |
2051 | /* Function: fputs_(const s8 *string, File_t *File); */ |
2036 | /* Function: fputs_(const s8 *string, File_t *File); */ |
2052 | /* */ |
2037 | /* */ |
2053 | /* Description: This function writes a string to the specified file. */ |
2038 | /* Description: This function writes a string to the specified file. */ |
2054 | /* */ |
2039 | /* */ |
2055 | /* Returnvalue: The function returns a no negative value or EOF on error. */ |
2040 | /* Returnvalue: The function returns a no negative value or EOF on error. */ |
2056 | /****************************************************************************************************************************************/ |
2041 | /****************************************************************************************************************************************/ |
2057 | s16 fputs_(s8 * const string, File_t * const file) |
2042 | s16 fputs_(s8 * const string, File_t * const file) |
2058 | { |
2043 | { |
2059 | u8 i=0; |
2044 | u8 i=0; |
2060 | s16 c = 0; |
2045 | s16 c = 0; |
2061 | 2046 | ||
2062 | if((!Partition.IsValid) || (file == NULL) || (string == NULL)) return(EOF); |
2047 | if((!Partition.IsValid) || (file == NULL) || (string == NULL)) return(EOF); |
2063 | if(file->Mode == 'r') return(EOF); |
2048 | if(file->Mode == 'r') return(EOF); |
2064 | while((string[i] != 0)&& (c != EOF)) |
2049 | while((string[i] != 0)&& (c != EOF)) |
2065 | { |
2050 | { |
2066 | c = fputc_(string[i], file); |
2051 | c = fputc_(string[i], file); |
2067 | i++; |
2052 | i++; |
2068 | } |
2053 | } |
2069 | return(c); |
2054 | return(c); |
2070 | } |
2055 | } |
2071 | 2056 | ||
2072 | /****************************************************************************************************************************************/ |
2057 | /****************************************************************************************************************************************/ |
2073 | /* Function: fgets_(s8 *, s16 , File_t *); */ |
2058 | /* Function: fgets_(s8 *, s16 , File_t *); */ |
2074 | /* */ |
2059 | /* */ |
2075 | /* Description: This function reads a string from the file to the specifies string. */ |
2060 | /* Description: This function reads a string from the file to the specifies string. */ |
2076 | /* */ |
2061 | /* */ |
2077 | /* Returnvalue: A pointer to the string read from the file or 0 on error. */ |
2062 | /* Returnvalue: A pointer to the string read from the file or 0 on error. */ |
2078 | /****************************************************************************************************************************************/ |
2063 | /****************************************************************************************************************************************/ |
2079 | s8 * fgets_(s8 * const string, s16 const length, File_t * const file) |
2064 | s8 * fgets_(s8 * const string, s16 const length, File_t * const file) |
2080 | { |
2065 | { |
2081 | s8 *pbuff; |
2066 | s8 *pbuff; |
2082 | s16 c = 0, bytecount; |
2067 | s16 c = 0, bytecount; |
2083 | 2068 | ||
2084 | if((!Partition.IsValid) || (file == NULL) || (string == NULL) || (length < 1)) return (0); |
2069 | if((!Partition.IsValid) || (file == NULL) || (string == NULL) || (length < 1)) return (0); |
2085 | bytecount = length; |
2070 | bytecount = length; |
2086 | pbuff = string; // set write pointer to start of string |
2071 | pbuff = string; // set write pointer to start of string |
2087 | while(bytecount > 1) // read the length-1 characters from the file to the string. |
2072 | while(bytecount > 1) // read the length-1 characters from the file to the string. |
2088 | { |
2073 | { |
2089 | c = fgetc_(file); // read a character from the opened file. |
2074 | c = fgetc_(file); // read a character from the opened file. |
2090 | switch(c) |
2075 | switch(c) |
2091 | { |
2076 | { |
2092 | case 0x0A: // new line |
2077 | case 0x0A: // new line |
2093 | *pbuff = 0; // set string terminator |
2078 | *pbuff = 0; // set string terminator |
2094 | return(string); // return normal |
2079 | return(string); // return normal |
2095 | 2080 | ||
2096 | case EOF: |
2081 | case EOF: |
2097 | *pbuff = 0; // set string terminator |
2082 | *pbuff = 0; // set string terminator |
2098 | return(0); |
2083 | return(0); |
2099 | 2084 | ||
2100 | default: |
2085 | default: |
2101 | *pbuff++ = (s8)c; // copy byte to string |
2086 | *pbuff++ = (s8)c; // copy byte to string |
2102 | bytecount--; |
2087 | bytecount--; |
2103 | break; |
2088 | break; |
2104 | } |
2089 | } |
2105 | } |
2090 | } |
2106 | *pbuff = 0; // set string terminator |
2091 | *pbuff = 0; // set string terminator |
2107 | return(string); |
2092 | return(string); |
2108 | } |
2093 | } |
2109 | 2094 | ||
2110 | /****************************************************************************************************************************************/ |
2095 | /****************************************************************************************************************************************/ |
2111 | /* Function: fclose_(File *file); */ |
2096 | /* Function: fclose_(File *file); */ |
2112 | /* */ |
2097 | /* */ |
2113 | /* Description: This function closes the open file by writing the remaining data */ |
2098 | /* Description: This function closes the open file by writing the remaining data */ |
2114 | /* from the buffer to the device and entering the filesize in the directory entry. */ |
2099 | /* from the buffer to the device and entering the filesize in the directory entry. */ |
2115 | /* */ |
2100 | /* */ |
2116 | /* Returnvalue: 0 on success EOF on error */ |
2101 | /* Returnvalue: 0 on success EOF on error */ |
2117 | /****************************************************************************************************************************************/ |
2102 | /****************************************************************************************************************************************/ |
2118 | s16 fclose_(File_t *file) |
2103 | s16 fclose_(File_t *file) |
2119 | { |
2104 | { |
2120 | s16 returnvalue = EOF; |
2105 | s16 returnvalue = EOF; |
2121 | 2106 | ||
2122 | if(file == NULL) return(returnvalue); |
2107 | if(file == NULL) return(returnvalue); |
2123 | returnvalue = fflush_(file); |
2108 | returnvalue = fflush_(file); |
2124 | UnlockFilePointer(file); |
2109 | UnlockFilePointer(file); |
2125 | return(returnvalue); |
2110 | return(returnvalue); |
2126 | } |
2111 | } |
2127 | 2112 | ||
2128 | 2113 | ||
2129 | /****************************************************************************************************************************************/ |
2114 | /****************************************************************************************************************************************/ |
2130 | /* Function: fexist_(const u8*); */ |
2115 | /* Function: fexist_(const u8*); */ |
2131 | /* */ |
2116 | /* */ |
2132 | /* Description: This function checks if a file already exist. */ |
2117 | /* Description: This function checks if a file already exist. */ |
2133 | /* */ |
2118 | /* */ |
2134 | /* Returnvalue: 1 if the file exist else 0. */ |
2119 | /* Returnvalue: 1 if the file exist else 0. */ |
2135 | /****************************************************************************************************************************************/ |
2120 | /****************************************************************************************************************************************/ |
2136 | u8 fexist_(s8 * const filename) |
2121 | u8 fexist_(s8 * const filename) |
2137 | { |
2122 | { |
2138 | u8 exist = 0; |
2123 | u8 exist = 0; |
2139 | File_t *file = 0; |
2124 | File_t *file = 0; |
2140 | file = LockFilePointer(); |
2125 | file = LockFilePointer(); |
2141 | exist = FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file); |
2126 | exist = FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file); |
2142 | UnlockFilePointer(file); |
2127 | UnlockFilePointer(file); |
2143 | return(exist); |
2128 | return(exist); |
2144 | } |
2129 | } |
2145 | 2130 | ||
2146 | /****************************************************************************************************************************************/ |
2131 | /****************************************************************************************************************************************/ |
2147 | /* Function: feof_(File_t *File); */ |
2132 | /* Function: feof_(File_t *File); */ |
2148 | /* */ |
2133 | /* */ |
2149 | /* Description: This function checks wether the end of the file has been reached. */ |
2134 | /* Description: This function checks wether the end of the file has been reached. */ |
2150 | /* */ |
2135 | /* */ |
2151 | /* Returnvalue: 0 if the end of the file was not reached otherwise 1. */ |
2136 | /* Returnvalue: 0 if the end of the file was not reached otherwise 1. */ |
2152 | /****************************************************************************************************************************************/ |
2137 | /****************************************************************************************************************************************/ |
2153 | u8 feof_(File_t *file) |
2138 | u8 feof_(File_t *file) |
2154 | { |
2139 | { |
2155 | if(((file->Position)+1) < (file->Size)) |
2140 | if(((file->Position)+1) < (file->Size)) |
2156 | { |
2141 | { |
2157 | return(0); |
2142 | return(0); |
2158 | } |
2143 | } |
2159 | else |
2144 | else |
2160 | { |
2145 | { |
2161 | return(1); |
2146 | return(1); |
2162 | } |
2147 | } |
2163 | } |
2148 | } |
2164 | 2149 | ||
2165 | 2150 | ||
2166 | /********************************************************************************************************************************************/ |
2151 | /********************************************************************************************************************************************/ |
2167 | /* Function: fdelete_(s8* filepath); */ |
2152 | /* Function: fdelete_(s8* filepath); */ |
2168 | /* */ |
2153 | /* */ |
2169 | /* Description: This function deletes the file with the specified filename from the filesystem */ |
2154 | /* Description: This function deletes the file with the specified filename from the filesystem */ |
2170 | /* */ |
2155 | /* */ |
2171 | /* */ |
2156 | /* */ |
2172 | /* Returnvalue: 1 : specified file deleted succesfully 0: specified file not found */ |
2157 | /* Returnvalue: 1 : specified file deleted succesfully 0: specified file not found */ |
2173 | /********************************************************************************************************************************************/ |
2158 | /********************************************************************************************************************************************/ |
2174 | 2159 | ||
2175 | u8 fdelete_(s8* const filepath) |
2160 | u8 fdelete_(s8* const filepath) |
2176 | { |
2161 | { |
2177 | u8 retvalue = 0; |
2162 | u8 retvalue = 0; |
2178 | File_t file; |
2163 | File_t file; |
2179 | 2164 | ||
2180 | if(filepath == NULL) return(0); |
2165 | if(filepath == NULL) return(0); |
2181 | // correct filepath formatting |
2166 | // correct filepath formatting |
2182 | Slashing_Path(filepath); |
2167 | Slashing_Path(filepath); |
2183 | file.FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
2168 | file.FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
2184 | file.FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
2169 | file.FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
2185 | file.FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
2170 | file.FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
2186 | file.SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
2171 | file.SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
2187 | file.ByteOfCurrSector = 0; // The byte location within the current sector. |
2172 | file.ByteOfCurrSector = 0; // The byte location within the current sector. |
2188 | file.Mode = 0; // Mode of fileoperation (read,write) |
2173 | file.Mode = 0; // Mode of fileoperation (read,write) |
2189 | file.Size = 0; // The size of the opend file in bytes. |
2174 | file.Size = 0; // The size of the opend file in bytes. |
2190 | file.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2175 | file.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2191 | file.DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
2176 | file.DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
2192 | file.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2177 | file.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2193 | file.Attribute = 0; // The attribute of the file opened. |
2178 | file.Attribute = 0; // The attribute of the file opened. |
2194 | file.SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
2179 | file.SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
2195 | file.State = FSTATE_USED; // mark it as used |
2180 | file.State = FSTATE_USED; // mark it as used |
2196 | 2181 | ||
2197 | // if file is existent |
2182 | // if file is existent |
2198 | if(FileExist(filepath, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, &file)) |
2183 | if(FileExist(filepath, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, &file)) |
2199 | { |
2184 | { |
2200 | // and is not marked as readonly? |
2185 | // and is not marked as readonly? |
2201 | if((file.Attribute & ATTR_READONLY) != ATTR_READONLY) |
2186 | if((file.Attribute & ATTR_READONLY) != ATTR_READONLY) |
2202 | { |
2187 | { |
2203 | // try to delete the file content from the filesystem |
2188 | // try to delete the file content from the filesystem |
2204 | if(DeleteClusterChain(file.FirstSectorOfFirstCluster)) |
2189 | if(DeleteClusterChain(file.FirstSectorOfFirstCluster)) |
2205 | { |
2190 | { |
2206 | // and try delete the directory entry of the file |
2191 | // and try delete the directory entry of the file |
2207 | retvalue = DeleteDirectoryEntry(&file); |
2192 | retvalue = DeleteDirectoryEntry(&file); |
2208 | } |
2193 | } |
2209 | } |
2194 | } |
2210 | } |
2195 | } |
2211 | return(retvalue); |
2196 | return(retvalue); |
2212 | } |
2197 | } |
2213 | 2198 | ||
2214 | /****************************************************************************************************************************************************/ |
2199 | /****************************************************************************************************************************************************/ |
2215 | /* Function: s8* FAT16_GetVolumeLabel(void) */ |
2200 | /* Function: s8* FAT16_GetVolumeLabel(void) */ |
2216 | /* */ |
2201 | /* */ |
2217 | /* Description: This function returns the volume label */ |
2202 | /* Description: This function returns the volume label */ |
2218 | /* */ |
2203 | /* */ |
2219 | /* Returnvalue: This function returns the pointer to the volume label or NULL if not found. */ |
2204 | /* Returnvalue: This function returns the pointer to the volume label or NULL if not found. */ |
2220 | /****************************************************************************************************************************************************/ |
2205 | /****************************************************************************************************************************************************/ |
2221 | s8* FAT16_GetVolumeLabel(void) |
2206 | s8* FAT16_GetVolumeLabel(void) |
2222 | { |
2207 | { |
2223 | s8 *pVolumeLabel = NULL; |
2208 | s8 *pVolumeLabel = NULL; |
2224 | u32 dir_sector, max_dir_sector, curr_sector; |
2209 | u32 dir_sector, max_dir_sector, curr_sector; |
2225 | u16 dir_entry = 0; |
2210 | u16 dir_entry = 0; |
2226 | u8 i = 0; |
2211 | u8 i = 0; |
2227 | 2212 | ||
2228 | DirEntry_t * dir; |
2213 | DirEntry_t * dir; |
2229 | File_t *file = NULL; |
2214 | File_t *file = NULL; |
2230 | 2215 | ||
2231 | // if Partition is not valid return NULL |
2216 | // if Partition is not valid return NULL |
2232 | if(!Partition.IsValid) return(pVolumeLabel); |
2217 | if(!Partition.IsValid) return(pVolumeLabel); |
2233 | // if Volume label was read before return it |
2218 | // if Volume label was read before return it |
2234 | if(Partition.VolumeLabel[0]!= '\0') return (Partition.VolumeLabel); |
2219 | if(Partition.VolumeLabel[0]!= '\0') return (Partition.VolumeLabel); |
2235 | // try to catch a file pointer |
2220 | // try to catch a file pointer |
2236 | file = LockFilePointer(); |
2221 | file = LockFilePointer(); |
2237 | if(file == NULL) return(pVolumeLabel); |
2222 | if(file == NULL) return(pVolumeLabel); |
2238 | // search dir entries direct within the root directory area |
2223 | // search dir entries direct within the root directory area |
2239 | file->DirectorySector = 0; |
2224 | file->DirectorySector = 0; |
2240 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
2225 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
2241 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
2226 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
2242 | 2227 | ||
2243 | // update current file data area position to start of first cluster |
2228 | // update current file data area position to start of first cluster |
2244 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
2229 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
2245 | file->SectorOfCurrCluster = 0; |
2230 | file->SectorOfCurrCluster = 0; |
2246 | file->ByteOfCurrSector = 0; |
2231 | file->ByteOfCurrSector = 0; |
2247 | 2232 | ||
2248 | dir_sector = 0; // reset sector counter within a new cluster |
2233 | dir_sector = 0; // reset sector counter within a new cluster |
2249 | do // loop over all sectors of the root directory |
2234 | do // loop over all sectors of the root directory |
2250 | { |
2235 | { |
2251 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
2236 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
2252 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
2237 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
2253 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
2238 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
2254 | { |
2239 | { |
2255 | Fat16_Deinit(); |
2240 | Fat16_Deinit(); |
2256 | return(NULL); |
2241 | return(NULL); |
2257 | } |
2242 | } |
2258 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
2243 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
2259 | // search all directory entries within that sector |
2244 | // search all directory entries within that sector |
2260 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
2245 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
2261 | { // check for existing dir entry |
2246 | { // check for existing dir entry |
2262 | switch((u8)dir[dir_entry].Name[0]) |
2247 | switch((u8)dir[dir_entry].Name[0]) |
2263 | { |
2248 | { |
2264 | case SLOT_EMPTY: |
2249 | case SLOT_EMPTY: |
2265 | case SLOT_DELETED: |
2250 | case SLOT_DELETED: |
2266 | // ignore empty or deleted dir entries |
2251 | // ignore empty or deleted dir entries |
2267 | break; |
2252 | break; |
2268 | default: |
2253 | default: |
2269 | // check attributes for volume label |
2254 | // check attributes for volume label |
2270 | if ((dir[dir_entry].Attribute & ATTR_VOLUMELABEL) != ATTR_VOLUMELABEL) break; // attribute must match |
2255 | if ((dir[dir_entry].Attribute & ATTR_VOLUMELABEL) != ATTR_VOLUMELABEL) break; // attribute must match |
2271 | // (first 11 characters include 8 chars of basename and 3 chars extension.) |
2256 | // (first 11 characters include 8 chars of basename and 3 chars extension.) |
2272 | for(i = 0; i<11;i++) Partition.VolumeLabel[i] = dir[dir_entry].Name[i]; |
2257 | for(i = 0; i<11;i++) Partition.VolumeLabel[i] = dir[dir_entry].Name[i]; |
2273 | Partition.VolumeLabel[11] = '\0'; // terminate string |
2258 | Partition.VolumeLabel[11] = '\0'; // terminate string |
2274 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
2259 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
2275 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
2260 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
2276 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
2261 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
2277 | file->SectorOfCurrCluster = 0; |
2262 | file->SectorOfCurrCluster = 0; |
2278 | file->ByteOfCurrSector = 0; |
2263 | file->ByteOfCurrSector = 0; |
2279 | file->DirectorySector = curr_sector; // current sector |
2264 | file->DirectorySector = curr_sector; // current sector |
2280 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
2265 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
2281 | file->Size = dir[dir_entry].Size; |
2266 | file->Size = dir[dir_entry].Size; |
2282 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
2267 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
2283 | pVolumeLabel = Partition.VolumeLabel; |
2268 | pVolumeLabel = Partition.VolumeLabel; |
2284 | } // end of first byte of name check |
2269 | } // end of first byte of name check |
2285 | } |
2270 | } |
2286 | dir_sector++; // search next sector |
2271 | dir_sector++; // search next sector |
2287 | // stop if we reached the end of the cluster or the end of the root dir |
2272 | // stop if we reached the end of the cluster or the end of the root dir |
2288 | }while((dir_sector < max_dir_sector) && (!pVolumeLabel)); |
2273 | }while((dir_sector < max_dir_sector) && (!pVolumeLabel)); |
2289 | 2274 | ||
2290 | UnlockFilePointer(file); |
2275 | UnlockFilePointer(file); |
2291 | return(pVolumeLabel); |
2276 | return(pVolumeLabel); |
2292 | } |
2277 | } |
2293 | 2278 | ||
2294 | 2279 | ||
2295 | /********************************************************************************************************************************************/ |
2280 | /********************************************************************************************************************************************/ |
2296 | /* Function: u8 FindItem(Find_t); */ |
2281 | /* Function: u8 FindItem(Find_t); */ |
2297 | /* */ |
2282 | /* */ |
2298 | /* Description: This function looks for the item specified by global structure FindElement in the actual directory */ |
2283 | /* Description: This function looks for the item specified by global structure FindElement in the actual directory */ |
2299 | /* */ |
2284 | /* */ |
2300 | /* */ |
2285 | /* */ |
2301 | /* Returnvalue: TRUE if an matching element was found */ |
2286 | /* Returnvalue: TRUE if an matching element was found */ |
2302 | /********************************************************************************************************************************************/ |
2287 | /********************************************************************************************************************************************/ |
2303 | 2288 | ||
2304 | u8 FindItem(Find_t *findelement) |
2289 | u8 FindItem(Find_t *findelement) |
2305 | { |
2290 | { |
2306 | u16 index = 0; |
2291 | u16 index = 0; |
2307 | u16 max_dir_sector = 0; |
2292 | u16 max_dir_sector = 0; |
2308 | u16 end_of_directory_not_reached = 1; // the directory has been read completely without a result. |
2293 | u16 end_of_directory_not_reached = 1; // the directory has been read completely without a result. |
2309 | u8 i = 0; |
2294 | u8 i = 0; |
2310 | u8 readpointer = 0; |
2295 | u8 readpointer = 0; |
2311 | u8 writepointer = 0; |
2296 | u8 writepointer = 0; |
2312 | u8 retvalue = 0; |
2297 | u8 retvalue = 0; |
2313 | DirEntry_t *DirectoryEntry; |
2298 | DirEntry_t *DirectoryEntry; |
2314 | File_t file; |
2299 | File_t file; |
2315 | SD_Result_t res=0; |
2300 | SD_Result_t res=0; |
2316 | 2301 | ||
2317 | file.FirstSectorOfCurrCluster = findelement->fp.FirstSectorOfCurrCluster; |
2302 | file.FirstSectorOfCurrCluster = findelement->fp.FirstSectorOfCurrCluster; |
2318 | file.SectorOfCurrCluster = findelement->fp.SectorOfCurrCluster; |
2303 | file.SectorOfCurrCluster = findelement->fp.SectorOfCurrCluster; |
2319 | index = findelement->fp.DirectoryIndex; |
2304 | index = findelement->fp.DirectoryIndex; |
2320 | 2305 | ||
2321 | // within the root directory area we can read sectors sequentially until the end of this area |
2306 | // within the root directory area we can read sectors sequentially until the end of this area |
2322 | if((Partition.FirstRootDirSector <= file.FirstSectorOfCurrCluster) && (file.FirstSectorOfCurrCluster < Partition.FirstDataSector)) |
2307 | if((Partition.FirstRootDirSector <= file.FirstSectorOfCurrCluster) && (file.FirstSectorOfCurrCluster < Partition.FirstDataSector)) |
2323 | { |
2308 | { |
2324 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
2309 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
2325 | } |
2310 | } |
2326 | // within the data clusters we can read sectors sequentially only within the cluster |
2311 | // within the data clusters we can read sectors sequentially only within the cluster |
2327 | else if((Partition.FirstDataSector <= file.FirstSectorOfCurrCluster) && (file.FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
2312 | else if((Partition.FirstDataSector <= file.FirstSectorOfCurrCluster) && (file.FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
2328 | { |
2313 | { |
2329 | max_dir_sector = Partition.SectorsPerCluster; // limit max secters before next cluster |
2314 | max_dir_sector = Partition.SectorsPerCluster; // limit max secters before next cluster |
2330 | } |
2315 | } |
2331 | 2316 | ||
2332 | do |
2317 | do |
2333 | { // search the next 16 rootentries in this sector of the roordirectory. |
2318 | { // search the next 16 rootentries in this sector of the roordirectory. |
2334 | res = SDC_GetSector(((u32) file.FirstSectorOfCurrCluster + (u32)file.SectorOfCurrCluster), file.Cache); // Read the Rootdirectory. |
2319 | res = SDC_GetSector(((u32) file.FirstSectorOfCurrCluster + (u32)file.SectorOfCurrCluster), file.Cache); // Read the Rootdirectory. |
2335 | if(res != SD_SUCCESS) |
2320 | if(res != SD_SUCCESS) |
2336 | { |
2321 | { |
2337 | Fat16_Deinit(); |
2322 | Fat16_Deinit(); |
2338 | return(0); |
2323 | return(0); |
2339 | } |
2324 | } |
2340 | 2325 | ||
2341 | DirectoryEntry = (DirEntry_t *)file.Cache; |
2326 | DirectoryEntry = (DirEntry_t *)file.Cache; |
2342 | 2327 | ||
2343 | while((!retvalue)&&(index < 16)) |
2328 | while((!retvalue)&&(index < 16)) |
2344 | { |
2329 | { |
2345 | i = 0; |
2330 | i = 0; |
2346 | if( (u8)DirectoryEntry[index].Name[0] != SLOT_DELETED) // ignore deleted items. |
2331 | if( (u8)DirectoryEntry[index].Name[0] != SLOT_DELETED) // ignore deleted items. |
2347 | { |
2332 | { |
2348 | while((i <= 10) && ( (DirectoryEntry[index].Name[i] == findelement->searchstring[i]) || (findelement->searchstring[i] == '*') || findelement->searchstring[i] == '?')) |
2333 | while((i <= 10) && ( (DirectoryEntry[index].Name[i] == findelement->searchstring[i]) || (findelement->searchstring[i] == '*') || findelement->searchstring[i] == '?')) |
2349 | { |
2334 | { |
2350 | i++; |
2335 | i++; |
2351 | } |
2336 | } |
2352 | } |
2337 | } |
2353 | if((DirectoryEntry[index].Attribute & 0x30) && (DirectoryEntry[index].Attribute & findelement->attribmask) && (i == 11)) |
2338 | if((DirectoryEntry[index].Attribute & 0x30) && (DirectoryEntry[index].Attribute & findelement->attribmask) && (i == 11)) |
2354 | { |
2339 | { |
2355 | /* initialize the namestring with 0 */ |
2340 | /* initialize the namestring with 0 */ |
2356 | for(i = 0; i < 12; i++) findelement->name[i] = 0; |
2341 | for(i = 0; i < 12; i++) findelement->name[i] = 0; |
2357 | for(readpointer = 0; readpointer <= 10; readpointer++) |
2342 | for(readpointer = 0; readpointer <= 10; readpointer++) |
2358 | { |
2343 | { |
2359 | if((DirectoryEntry[index].Name[readpointer] != ' ') && (readpointer!=8)) |
2344 | if((DirectoryEntry[index].Name[readpointer] != ' ') && (readpointer!=8)) |
2360 | { |
2345 | { |
2361 | findelement->name[writepointer] = DirectoryEntry[index].Name[readpointer]; // copy the name of the item found to the find_structure. |
2346 | findelement->name[writepointer] = DirectoryEntry[index].Name[readpointer]; // copy the name of the item found to the find_structure. |
2362 | writepointer++; |
2347 | writepointer++; |
2363 | } |
2348 | } |
2364 | else |
2349 | else |
2365 | { |
2350 | { |
2366 | if(DirectoryEntry[index].Attribute == ATTR_ARCHIVE) |
2351 | if(DirectoryEntry[index].Attribute == ATTR_ARCHIVE) |
2367 | { |
2352 | { |
2368 | if(readpointer < 8) readpointer = 8; |
2353 | if(readpointer < 8) readpointer = 8; |
2369 | if(DirectoryEntry[index].Name[readpointer] != ' ') |
2354 | if(DirectoryEntry[index].Name[readpointer] != ' ') |
2370 | { |
2355 | { |
2371 | findelement->name[writepointer] = '.'; // then seperate the name and the extension by a '.' at index 8. |
2356 | findelement->name[writepointer] = '.'; // then seperate the name and the extension by a '.' at index 8. |
2372 | writepointer++; |
2357 | writepointer++; |
2373 | findelement->name[writepointer] = DirectoryEntry[index].Name[readpointer]; // copy the name of the item found to the find_structure. |
2358 | findelement->name[writepointer] = DirectoryEntry[index].Name[readpointer]; // copy the name of the item found to the find_structure. |
2374 | writepointer++; |
2359 | writepointer++; |
2375 | } |
2360 | } |
2376 | else break; |
2361 | else break; |
2377 | } |
2362 | } |
2378 | else break; |
2363 | else break; |
2379 | } |
2364 | } |
2380 | } |
2365 | } |
2381 | findelement->fp.FirstSectorOfFirstCluster = (u32) DirectoryEntry[index].StartCluster; |
2366 | findelement->fp.FirstSectorOfFirstCluster = (u32) DirectoryEntry[index].StartCluster; |
2382 | findelement->fp.DirectoryIndex = index; |
2367 | findelement->fp.DirectoryIndex = index; |
2383 | findelement->fp.FirstSectorOfCurrCluster = file.FirstSectorOfCurrCluster; |
2368 | findelement->fp.FirstSectorOfCurrCluster = file.FirstSectorOfCurrCluster; |
2384 | findelement->fp.DirectorySector = (file.FirstSectorOfCurrCluster + file.SectorOfCurrCluster); |
2369 | findelement->fp.DirectorySector = (file.FirstSectorOfCurrCluster + file.SectorOfCurrCluster); |
2385 | findelement->fp.SectorOfCurrCluster = file.SectorOfCurrCluster; |
2370 | findelement->fp.SectorOfCurrCluster = file.SectorOfCurrCluster; |
2386 | findelement->fp.Size = DirectoryEntry[index].Size; |
2371 | findelement->fp.Size = DirectoryEntry[index].Size; |
2387 | findelement->fp.Attribute = DirectoryEntry[index].Attribute; |
2372 | findelement->fp.Attribute = DirectoryEntry[index].Attribute; |
2388 | retvalue = 1; |
2373 | retvalue = 1; |
2389 | } |
2374 | } |
2390 | /* search the next sector */ |
2375 | /* search the next sector */ |
2391 | index++; |
2376 | index++; |
2392 | } |
2377 | } |
2393 | /* this sector has been searched but we havn't found what we are looking for. Therefore we have to find the next sector */ |
2378 | /* this sector has been searched but we havn't found what we are looking for. Therefore we have to find the next sector */ |
2394 | if(!retvalue) // file not found in this sector so take next sector. |
2379 | if(!retvalue) // file not found in this sector so take next sector. |
2395 | { |
2380 | { |
2396 | /* in the next sector we start looking for the specified entry beginning at index 0 */ |
2381 | /* in the next sector we start looking for the specified entry beginning at index 0 */ |
2397 | index = 0; |
2382 | index = 0; |
2398 | /* there are still sectors to be read within the cluster or within the linear addresspace of the rootdirectory */ |
2383 | /* there are still sectors to be read within the cluster or within the linear addresspace of the rootdirectory */ |
2399 | if(file.SectorOfCurrCluster < max_dir_sector-1) file.SectorOfCurrCluster++; |
2384 | if(file.SectorOfCurrCluster < max_dir_sector-1) file.SectorOfCurrCluster++; |
2400 | /* if we are looking for an directoryentry outside the rootdirectory and have reached the end of the cluster we have to get the next one */ |
2385 | /* if we are looking for an directoryentry outside the rootdirectory and have reached the end of the cluster we have to get the next one */ |
2401 | else if(Partition.FirstDataSector <= file.FirstSectorOfCurrCluster) |
2386 | else if(Partition.FirstDataSector <= file.FirstSectorOfCurrCluster) |
2402 | { |
2387 | { |
2403 | end_of_directory_not_reached = GetNextCluster(&file); |
2388 | end_of_directory_not_reached = GetNextCluster(&file); |
2404 | } |
2389 | } |
2405 | // within the rootdirectory we abort searching for elements after the maximun number of possible rootentries has beensearched |
2390 | // within the rootdirectory we abort searching for elements after the maximun number of possible rootentries has beensearched |
2406 | else |
2391 | else |
2407 | { |
2392 | { |
2408 | end_of_directory_not_reached = 0; |
2393 | end_of_directory_not_reached = 0; |
2409 | } |
2394 | } |
2410 | } |
2395 | } |
2411 | } |
2396 | } |
2412 | while((end_of_directory_not_reached) && (!retvalue) ); |
2397 | while((end_of_directory_not_reached) && (!retvalue) ); |
2413 | 2398 | ||
2414 | return(retvalue); |
2399 | return(retvalue); |
2415 | } |
2400 | } |
2416 | 2401 | ||
2417 | 2402 | ||
2418 | 2403 | ||
2419 | 2404 | ||
2420 | /********************************************************************************************************************************************/ |
2405 | /********************************************************************************************************************************************/ |
2421 | /* Function: findnext_(Find_t *); */ |
2406 | /* Function: findnext_(Find_t *); */ |
2422 | /* */ |
2407 | /* */ |
2423 | /* Description: This function looks for the next item in the specified directory with a matching filename and fileattributes specified */ |
2408 | /* Description: This function looks for the next item in the specified directory with a matching filename and fileattributes specified */ |
2424 | /* by function findfirst() */ |
2409 | /* by function findfirst() */ |
2425 | /* */ |
2410 | /* */ |
2426 | /* Returnvalue: */ |
2411 | /* Returnvalue: */ |
2427 | /********************************************************************************************************************************************/ |
2412 | /********************************************************************************************************************************************/ |
2428 | u8 findnext_(Find_t * findelement) |
2413 | u8 findnext_(Find_t * findelement) |
2429 | { |
2414 | { |
2430 | u8 itemfound = 0; |
2415 | u8 itemfound = 0; |
2431 | u8 index = 0; |
2416 | u8 index = 0; |
2432 | 2417 | ||
2433 | findelement->fp.DirectoryIndex++; |
2418 | findelement->fp.DirectoryIndex++; |
2434 | 2419 | ||
2435 | /* before we start searching an element we clear the complete namestring within the structure FindElement */ |
2420 | /* before we start searching an element we clear the complete namestring within the structure FindElement */ |
2436 | for(index = 0; index < 11; index++) findelement->name[index] = 0; |
2421 | for(index = 0; index < 11; index++) findelement->name[index] = 0; |
2437 | 2422 | ||
2438 | if(FindItem(findelement)) |
2423 | if(FindItem(findelement)) |
2439 | { |
2424 | { |
2440 | itemfound = 1; |
2425 | itemfound = 1; |
2441 | } |
2426 | } |
2442 | 2427 | ||
2443 | return(itemfound); |
2428 | return(itemfound); |
2444 | } |
2429 | } |
2445 | 2430 | ||
2446 | 2431 | ||
2447 | 2432 | ||
2448 | /********************************************************************************************************************************************/ |
2433 | /********************************************************************************************************************************************/ |
2449 | /* Function: findfirst_(s8* filename, u8 attribmask, Find_t *); */ |
2434 | /* Function: findfirst_(s8* filename, u8 attribmask, Find_t *); */ |
2450 | /* */ |
2435 | /* */ |
2451 | /* Description: This function looks for the first item in the specified directory with a matching filename and fileattributes */ |
2436 | /* Description: This function looks for the first item in the specified directory with a matching filename and fileattributes */ |
2452 | /* The filename of the element found is transformed from 8.3 to a string */ |
2437 | /* The filename of the element found is transformed from 8.3 to a string */ |
2453 | /* */ |
2438 | /* */ |
2454 | /* */ |
2439 | /* */ |
2455 | /* Returnvalue: (1) if Element was found. (0) if no valid element was found */ |
2440 | /* Returnvalue: (1) if Element was found. (0) if no valid element was found */ |
2456 | /********************************************************************************************************************************************/ |
2441 | /********************************************************************************************************************************************/ |
2457 | u8 findfirst_(const s8* name, u8 attribmask, Find_t *findelement) |
2442 | u8 findfirst_(const s8* name, u8 attribmask, Find_t *findelement) |
2458 | { |
2443 | { |
2459 | u8 itemfound = 0; |
2444 | u8 itemfound = 0; |
2460 | u8 index = 0; |
2445 | u8 index = 0; |
2461 | 2446 | ||
2462 | /* initialize the FindElement structure */ |
2447 | /* initialize the FindElement structure */ |
2463 | findelement->fp.FirstSectorOfFirstCluster = 0; // First sector of the first cluster of the file. |
2448 | findelement->fp.FirstSectorOfFirstCluster = 0; // First sector of the first cluster of the file. |
2464 | findelement->fp.FirstSectorOfCurrCluster = Partition.CurrentWorkingDirectory; // First sector of the cluster which is edited at the moment. |
2449 | findelement->fp.FirstSectorOfCurrCluster = Partition.CurrentWorkingDirectory; // First sector of the cluster which is edited at the moment. |
2465 | findelement->fp.SectorOfCurrCluster = 0; // The sector within the current cluster. |
2450 | findelement->fp.SectorOfCurrCluster = 0; // The sector within the current cluster. |
2466 | findelement->fp.ByteOfCurrSector = 0; // The byte location within the current sector. |
2451 | findelement->fp.ByteOfCurrSector = 0; // The byte location within the current sector. |
2467 | findelement->fp.Size = 0; // The size of the opend file in bytes. |
2452 | findelement->fp.Size = 0; // The size of the opend file in bytes. |
2468 | findelement->fp.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2453 | findelement->fp.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2469 | findelement->fp.DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
2454 | findelement->fp.DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
2470 | findelement->fp.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2455 | findelement->fp.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2471 | findelement->attribfilter = 0; |
2456 | findelement->attribfilter = 0; |
2472 | findelement->attribmask = attribmask; |
2457 | findelement->attribmask = attribmask; |
2473 | findelement->searchstring[0] = 0; // terminate string at the begin (=NULL) |
2458 | findelement->searchstring[0] = 0; // terminate string at the begin (=NULL) |
2474 | 2459 | ||
2475 | // bring it to the 8.3 format |
2460 | // bring it to the 8.3 format |
2476 | if(NULL == SeperateFormatedDirName(name, findelement->searchstring)) return(0); |
2461 | if(NULL == SeperateFormatedDirName(name, findelement->searchstring)) return(0); |
2477 | 2462 | ||
2478 | //process the wildcards (*). After an * all following character are wildcards to |
2463 | //process the wildcards (*). After an * all following character are wildcards to |
2479 | for(index = 0;index < 8;index++) |
2464 | for(index = 0;index < 8;index++) |
2480 | { |
2465 | { |
2481 | /* if we find an wildcard within the name of the searchstring all remaining character after the wildcard shall be wildcards also */ |
2466 | /* if we find an wildcard within the name of the searchstring all remaining character after the wildcard shall be wildcards also */ |
2482 | if(findelement->searchstring[index] == '*') |
2467 | if(findelement->searchstring[index] == '*') |
2483 | { |
2468 | { |
2484 | /* */ |
2469 | /* */ |
2485 | while(++index < 8) findelement->searchstring[index] = '*'; |
2470 | while(++index < 8) findelement->searchstring[index] = '*'; |
2486 | } |
2471 | } |
2487 | } |
2472 | } |
2488 | for(index = 8;index < 11;index++) |
2473 | for(index = 8;index < 11;index++) |
2489 | { |
2474 | { |
2490 | /* if we find an wildcard within the name of the searchstring all remaining character after the wildcard shall be wildcards also */ |
2475 | /* if we find an wildcard within the name of the searchstring all remaining character after the wildcard shall be wildcards also */ |
2491 | if(findelement->searchstring[index] == '*') |
2476 | if(findelement->searchstring[index] == '*') |
2492 | { |
2477 | { |
2493 | /* */ |
2478 | /* */ |
2494 | while(++index < 11) findelement->searchstring[index] = '*'; |
2479 | while(++index < 11) findelement->searchstring[index] = '*'; |
2495 | } |
2480 | } |
2496 | } |
2481 | } |
2497 | 2482 | ||
2498 | /* the value of ...DirectoryIndex will be incremented in findnext_() thererfore it has to be decremented in findfirst_() */ |
2483 | /* the value of ...DirectoryIndex will be incremented in findnext_() thererfore it has to be decremented in findfirst_() */ |
2499 | findelement->fp.DirectoryIndex--; |
2484 | findelement->fp.DirectoryIndex--; |
2500 | /* now lets search for the item within the direcory */ |
2485 | /* now lets search for the item within the direcory */ |
2501 | itemfound = findnext_(findelement); |
2486 | itemfound = findnext_(findelement); |
2502 | 2487 | ||
2503 | return(itemfound); |
2488 | return(itemfound); |
2504 | } |
2489 | } |
2505 | 2490 | ||
2506 | /********************************************************************************************************************************************/ |
2491 | /********************************************************************************************************************************************/ |
2507 | /* Function: s8 *GetSubDirectory (s8 *dirpath, s8 *directory) */ |
2492 | /* Function: s8 *GetSubDirectory (s8 *dirpath, s8 *directory) */ |
2508 | /* */ |
2493 | /* */ |
2509 | /* Description: this function parses the dirpath string and copies the first directroy name to the location pointed to by directroy */ |
2494 | /* Description: this function parses the dirpath string and copies the first directroy name to the location pointed to by directroy */ |
2510 | /* */ |
2495 | /* */ |
2511 | /* */ |
2496 | /* */ |
2512 | /* returnvalue: a pointer to the beginning of the next subdirectory or NULL */ |
2497 | /* returnvalue: a pointer to the beginning of the next subdirectory or NULL */ |
2513 | /********************************************************************************************************************************************/ |
2498 | /********************************************************************************************************************************************/ |
2514 | s8 * GetSubDirectory(s8 *dirpath, s8 *directory) |
2499 | s8 * GetSubDirectory(s8 *dirpath, s8 *directory) |
2515 | { |
2500 | { |
2516 | s8 *cptr = dirpath; |
2501 | s8 *cptr = dirpath; |
2517 | s8 *dptr = directory; |
2502 | s8 *dptr = directory; |
2518 | s8 *remainingpath = NULL; |
2503 | s8 *remainingpath = NULL; |
2519 | 2504 | ||
2520 | /* if the first character of the path is an '/' we go to the next character */ |
2505 | /* if the first character of the path is an '/' we go to the next character */ |
2521 | if(*cptr == '/') cptr++; |
2506 | if(*cptr == '/') cptr++; |
2522 | /* search end of path or subdirectory*/ |
2507 | /* search end of path or subdirectory*/ |
2523 | while((*cptr != 0) && (*cptr != '/')) |
2508 | while((*cptr != 0) && (*cptr != '/')) |
2524 | { |
2509 | { |
2525 | *dptr = *cptr; // copy to directory string buffer |
2510 | *dptr = *cptr; // copy to directory string buffer |
2526 | dptr++; |
2511 | dptr++; |
2527 | cptr++; |
2512 | cptr++; |
2528 | } |
2513 | } |
2529 | if(*cptr!=0) remainingpath = ++cptr; // return pointer to remaining path string |
2514 | if(*cptr!=0) remainingpath = ++cptr; // return pointer to remaining path string |
2530 | *dptr = 0; // terminate directory name string |
2515 | *dptr = 0; // terminate directory name string |
2531 | 2516 | ||
2532 | return(remainingpath); |
2517 | return(remainingpath); |
2533 | } |
2518 | } |
2534 | 2519 | ||
2535 | 2520 | ||
2536 | /********************************************************************************************************************************************/ |
2521 | /********************************************************************************************************************************************/ |
2537 | /* Function: u8 chdir_(s8* const path); */ |
2522 | /* Function: u8 chdir_(s8* const path); */ |
2538 | /* */ |
2523 | /* */ |
2539 | /* Description: This function changes the current working directory to the directory specified by the filepath */ |
2524 | /* Description: This function changes the current working directory to the directory specified by the filepath */ |
2540 | /* by function findfirst() */ |
2525 | /* by function findfirst() */ |
2541 | /* */ |
2526 | /* */ |
2542 | /* Returnvalue: */ |
2527 | /* Returnvalue: */ |
2543 | /********************************************************************************************************************************************/ |
2528 | /********************************************************************************************************************************************/ |
2544 | 2529 | ||
2545 | u8 chdir_(s8* const path) |
2530 | u8 chdir_(s8* const path) |
2546 | { |
2531 | { |
2547 | u8 retvalue = 0; // the value returned by this function |
2532 | u8 retvalue = 0; // the value returned by this function |
2548 | u32 ultemp = 0; // temp. variable |
2533 | u32 ultemp = 0; // temp. variable |
2549 | s8 *dirpath = path; // pointer to the remaining path string |
2534 | s8 *dirpath = path; // pointer to the remaining path string |
2550 | s8 dirname[64]; // a buffer containing the name of the subdirectory we are actually looking for |
2535 | s8 dirname[64]; // a buffer containing the name of the subdirectory we are actually looking for |
2551 | Find_t fe; // The findelement needed for function findfirst to find the subdirectory entry |
2536 | Find_t fe; // The findelement needed for function findfirst to find the subdirectory entry |
2552 | s8 tp[256]; // temporarily we remember the actual path until the operation has finished successfully |
2537 | s8 tp[256]; // temporarily we remember the actual path until the operation has finished successfully |
2553 | u32 tcwd = 0; // temporarily we remember the actual current working directory |
2538 | u32 tcwd = 0; // temporarily we remember the actual current working directory |
2554 | 2539 | ||
2555 | if(path == NULL) return(0); // return immediately of no path is given |
2540 | if(path == NULL) return(0); // return immediately of no path is given |
2556 | // correct filepath formatting |
2541 | // correct filepath formatting |
2557 | Slashing_Path(path); |
2542 | Slashing_Path(path); |
2558 | 2543 | ||
2559 | // lets remember the actual path and correspondig directory sector |
2544 | // lets remember the actual path and correspondig directory sector |
2560 | strcpy(tp, Partition.PathToCwd); |
2545 | strcpy(tp, Partition.PathToCwd); |
2561 | tcwd = Partition.CurrentWorkingDirectory; |
2546 | tcwd = Partition.CurrentWorkingDirectory; |
2562 | 2547 | ||
2563 | if(path[0] == '/') // if the path is absolute we begin at the rootdirectory |
2548 | if(path[0] == '/') // if the path is absolute we begin at the rootdirectory |
2564 | { |
2549 | { |
2565 | strcpy(Partition.PathToCwd, "/"); |
2550 | strcpy(Partition.PathToCwd, "/"); |
2566 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
2551 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
2567 | } |
2552 | } |
2568 | // parse through all the subdirectories within the path |
2553 | // parse through all the subdirectories within the path |
2569 | do |
2554 | do |
2570 | { |
2555 | { |
2571 | dirpath = GetSubDirectory(dirpath, dirname); // get the name of the subdirectory we are looking for and the remainig path |
2556 | dirpath = GetSubDirectory(dirpath, dirname); // get the name of the subdirectory we are looking for and the remainig path |
2572 | if(dirname[0] == 0) // if no directory name is available |
2557 | if(dirname[0] == 0) // if no directory name is available |
2573 | { |
2558 | { |
2574 | retvalue = 1; // we are done |
2559 | retvalue = 1; // we are done |
2575 | break; // break the loop |
2560 | break; // break the loop |
2576 | } |
2561 | } |
2577 | // search for the next subdirectory within the path |
2562 | // search for the next subdirectory within the path |
2578 | if(findfirst_(dirname, ATTR_SUBDIRECTORY, &fe)) |
2563 | if(findfirst_(dirname, ATTR_SUBDIRECTORY, &fe)) |
2579 | { |
2564 | { |
2580 | // we try to change into the directory "..". Now we have to delete the last direntry from the path |
2565 | // we try to change into the directory "..". Now we have to delete the last direntry from the path |
2581 | if(strcmp(dirname, "..") == 0) CWDPath_Pop(); |
2566 | if(strcmp(dirname, "..") == 0) CWDPath_Pop(); |
2582 | // we try to change into the actual directory so there's nothing todo |
2567 | // we try to change into the actual directory so there's nothing todo |
2583 | else if(dirname[0] == '.') return(1); |
2568 | else if(dirname[0] == '.') return(1); |
2584 | // otherwise we append the name of the directory we are changing in to the path |
2569 | // otherwise we append the name of the directory we are changing in to the path |
2585 | else CWDPath_Push(dirname); |
2570 | else CWDPath_Push(dirname); |
2586 | // The startcluster within an directory entry specifies the position within the fat where the file or directory starts |
2571 | // The startcluster within an directory entry specifies the position within the fat where the file or directory starts |
2587 | ultemp = (u32) fe.fp.FirstSectorOfFirstCluster; |
2572 | ultemp = (u32) fe.fp.FirstSectorOfFirstCluster; |
2588 | // do we have to change into the rootdirectory? |
2573 | // do we have to change into the rootdirectory? |
2589 | if(ultemp) |
2574 | if(ultemp) |
2590 | { |
2575 | { |
2591 | // the first 2 entries are reserved for '.' and '..' |
2576 | // the first 2 entries are reserved for '.' and '..' |
2592 | ultemp -= 2; |
2577 | ultemp -= 2; |
2593 | // now we have to transform the position within the fat into the corrosponding sectoraddress relative to the beginning of the datasection of the active partition |
2578 | // now we have to transform the position within the fat into the corrosponding sectoraddress relative to the beginning of the datasection of the active partition |
2594 | ultemp *= Partition.SectorsPerCluster; |
2579 | ultemp *= Partition.SectorsPerCluster; |
2595 | // at least we make the sectoraddress absolute by adding the relative address to the beginning of the datasection of the active partition |
2580 | // at least we make the sectoraddress absolute by adding the relative address to the beginning of the datasection of the active partition |
2596 | ultemp += Partition.FirstDataSector; |
2581 | ultemp += Partition.FirstDataSector; |
2597 | // the cwd now points to the specified directory |
2582 | // the cwd now points to the specified directory |
2598 | Partition.CurrentWorkingDirectory = ultemp; |
2583 | Partition.CurrentWorkingDirectory = ultemp; |
2599 | } |
2584 | } |
2600 | else // (=0) root directory |
2585 | else // (=0) root directory |
2601 | { |
2586 | { |
2602 | // the cwd now points to the rootdirectory |
2587 | // the cwd now points to the rootdirectory |
2603 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
2588 | Partition.CurrentWorkingDirectory = Partition.FirstRootDirSector; |
2604 | } |
2589 | } |
2605 | retvalue = 1; |
2590 | retvalue = 1; |
2606 | } |
2591 | } |
2607 | else // subdirectory not found |
2592 | else // subdirectory not found |
2608 | { |
2593 | { |
2609 | retvalue = 0; // no success tracing along the given directory chain |
2594 | retvalue = 0; // no success tracing along the given directory chain |
2610 | break; // break the loop |
2595 | break; // break the loop |
2611 | } |
2596 | } |
2612 | } |
2597 | } |
2613 | while(dirpath != NULL); // do this until all subdirectories have been found |
2598 | while(dirpath != NULL); // do this until all subdirectories have been found |
2614 | 2599 | ||
2615 | // if we could not change to the specified directory we restore the actual path |
2600 | // if we could not change to the specified directory we restore the actual path |
2616 | if(!retvalue) |
2601 | if(!retvalue) |
2617 | { |
2602 | { |
2618 | Partition.CurrentWorkingDirectory = tcwd; |
2603 | Partition.CurrentWorkingDirectory = tcwd; |
2619 | strcpy(Partition.PathToCwd, tp); |
2604 | strcpy(Partition.PathToCwd, tp); |
2620 | } |
2605 | } |
2621 | return(retvalue); |
2606 | return(retvalue); |
2622 | } |
2607 | } |
2623 | 2608 | ||
2624 | 2609 | ||
2625 | /********************************************************************************************************************************************/ |
2610 | /********************************************************************************************************************************************/ |
2626 | /* Function: u8 rmdir_(s8* dname); */ |
2611 | /* Function: u8 rmdir_(s8* dname); */ |
2627 | /* */ |
2612 | /* */ |
2628 | /* Description: This function deletes the directory with the specified filename from the filesystem */ |
2613 | /* Description: This function deletes the directory with the specified filename from the filesystem */ |
2629 | /* */ |
2614 | /* */ |
2630 | /* */ |
2615 | /* */ |
2631 | /* Returnvalue: 1 : specified directory deleted succesfully 0: specified directory not found */ |
2616 | /* Returnvalue: 1 : specified directory deleted succesfully 0: specified directory not found */ |
2632 | /********************************************************************************************************************************************/ |
2617 | /********************************************************************************************************************************************/ |
2633 | 2618 | ||
2634 | u8 rmdir_(s8* const dirpath) |
2619 | u8 rmdir_(s8* const dirpath) |
2635 | { |
2620 | { |
2636 | u8 retvalue = 0; |
2621 | u8 retvalue = 0; |
2637 | Find_t fe; |
2622 | Find_t fe; |
2638 | u32 cwd; |
2623 | u32 cwd; |
2639 | s8 path[256]; |
2624 | s8 path[256]; |
2640 | s8 *dn; |
2625 | s8 *dn; |
2641 | s8 *dp; |
2626 | s8 *dp; |
2642 | 2627 | ||
2643 | if(dirpath == NULL) return(0); |
2628 | if(dirpath == NULL) return(0); |
2644 | // correct filepath formatting |
2629 | // correct filepath formatting |
2645 | Slashing_Path(dirpath); |
2630 | Slashing_Path(dirpath); |
2646 | 2631 | ||
2647 | // remember the current workingdirectory |
2632 | // remember the current workingdirectory |
2648 | cwd = Partition.CurrentWorkingDirectory; |
2633 | cwd = Partition.CurrentWorkingDirectory; |
2649 | 2634 | ||
2650 | // create local copy of the path |
2635 | // create local copy of the path |
2651 | strcpy(path, dirpath); |
2636 | strcpy(path, dirpath); |
2652 | // seperate the filepath from the last directory within the path that shall be deleted |
2637 | // seperate the filepath from the last directory within the path that shall be deleted |
2653 | // start searching for the name of the directory to be deleted from the beginning of the path |
2638 | // start searching for the name of the directory to be deleted from the beginning of the path |
2654 | dn = path; |
2639 | dn = path; |
2655 | dp = path; |
2640 | dp = path; |
2656 | // search the complete path until the end of the string is found |
2641 | // search the complete path until the end of the string is found |
2657 | while(*dn != 0) dn++; |
2642 | while(*dn != 0) dn++; |
2658 | // now check if the last directory whithin the path is terminated with an '/' and remove the '/' from the directoryname |
2643 | // now check if the last directory whithin the path is terminated with an '/' and remove the '/' from the directoryname |
2659 | if(*(dn-1) == '/') *--dn = 0; |
2644 | if(*(dn-1) == '/') *--dn = 0; |
2660 | // now find the beginning of the last directoryentry |
2645 | // now find the beginning of the last directoryentry |
2661 | while((*dn != '/') && (dn > path)) dn--; |
2646 | while((*dn != '/') && (dn > path)) dn--; |
2662 | // beginning of the last directory found |
2647 | // beginning of the last directory found |
2663 | if(*dn == '/') |
2648 | if(*dn == '/') |
2664 | { |
2649 | { |
2665 | // remove the directoryname from the path by terminating the path with 0 |
2650 | // remove the directoryname from the path by terminating the path with 0 |
2666 | *dn = 0; |
2651 | *dn = 0; |
2667 | // the dirname begins 1 character after the terminated path |
2652 | // the dirname begins 1 character after the terminated path |
2668 | dn++; |
2653 | dn++; |
2669 | } |
2654 | } |
2670 | // we couldn't find a path before the directory to be deleted or no directoryname at all |
2655 | // we couldn't find a path before the directory to be deleted or no directoryname at all |
2671 | else |
2656 | else |
2672 | { |
2657 | { |
2673 | // there is no path before the name of the directory to be deleted |
2658 | // there is no path before the name of the directory to be deleted |
2674 | if(dn == path) |
2659 | if(dn == path) |
2675 | { |
2660 | { |
2676 | // if there is a name of a directory to be deleted? |
2661 | // if there is a name of a directory to be deleted? |
2677 | if(*dn == 0) return(0); |
2662 | if(*dn == 0) return(0); |
2678 | // the directory to be deleted is within the actual directory therefore we don't have to change the directory before deleting the directory |
2663 | // the directory to be deleted is within the actual directory therefore we don't have to change the directory before deleting the directory |
2679 | dp = NULL; |
2664 | dp = NULL; |
2680 | } |
2665 | } |
2681 | 2666 | ||
2682 | } |
2667 | } |
2683 | // switch to the directory containing the directory to be deleted if neccessary |
2668 | // switch to the directory containing the directory to be deleted if neccessary |
2684 | if(dp != NULL) |
2669 | if(dp != NULL) |
2685 | { |
2670 | { |
2686 | if(!chdir_(dp)) return(0); |
2671 | if(!chdir_(dp)) return(0); |
2687 | } |
2672 | } |
2688 | // now we have to find the specified directory to be deleted |
2673 | // now we have to find the specified directory to be deleted |
2689 | retvalue = findfirst_(dn, 0xff, &fe); |
2674 | retvalue = findfirst_(dn, 0xff, &fe); |
2690 | // was the specified directory found? |
2675 | // was the specified directory found? |
2691 | if(retvalue) |
2676 | if(retvalue) |
2692 | { |
2677 | { |
2693 | // before we delete the directory we check if the directory is empty |
2678 | // before we delete the directory we check if the directory is empty |
2694 | if(chdir_(dn)) |
2679 | if(chdir_(dn)) |
2695 | { |
2680 | { |
2696 | if(findfirst_("*.*", 0xff, &fe)) |
2681 | if(findfirst_("*.*", 0xff, &fe)) |
2697 | { |
2682 | { |
2698 | // within an directory that shall be deleted only the entries . and .. are allowed |
2683 | // within an directory that shall be deleted only the entries . and .. are allowed |
2699 | if((strncmp(fe.name, ".", 1) != 0) && (strncmp(fe.name, "..", 2) != 0)) retvalue = 0; |
2684 | if((strncmp(fe.name, ".", 1) != 0) && (strncmp(fe.name, "..", 2) != 0)) retvalue = 0; |
2700 | while(findnext_(&fe)) |
2685 | while(findnext_(&fe)) |
2701 | { |
2686 | { |
2702 | if((strncmp(fe.name, ".", 1) != 0) && (strncmp(fe.name, "..", 2) != 0)) retvalue = 0; |
2687 | if((strncmp(fe.name, ".", 1) != 0) && (strncmp(fe.name, "..", 2) != 0)) retvalue = 0; |
2703 | } |
2688 | } |
2704 | } |
2689 | } |
2705 | chdir_(".."); |
2690 | chdir_(".."); |
2706 | } |
2691 | } |
2707 | // directory couldn't be entered, is a real file? |
2692 | // directory couldn't be entered, is a real file? |
2708 | else |
2693 | else |
2709 | { |
2694 | { |
2710 | retvalue = 0; |
2695 | retvalue = 0; |
2711 | } |
2696 | } |
2712 | // specified directory is empty |
2697 | // specified directory is empty |
2713 | if(retvalue) |
2698 | if(retvalue) |
2714 | { |
2699 | { |
2715 | retvalue = 0; |
2700 | retvalue = 0; |
2716 | // we have modified the result of the findfirst_ operation therefore we have to redo findfirst_ to get detailed infos about the directory entry to be deleted |
2701 | // we have modified the result of the findfirst_ operation therefore we have to redo findfirst_ to get detailed infos about the directory entry to be deleted |
2717 | if(findfirst_(dn, 0xff, &fe)) |
2702 | if(findfirst_(dn, 0xff, &fe)) |
2718 | { |
2703 | { |
2719 | Debug("found"); |
2704 | Debug("found"); |
2720 | // try to clear the allocated clusters within the fat |
2705 | // try to clear the allocated clusters within the fat |
2721 | if(DeleteClusterChain(fe.fp.FirstSectorOfFirstCluster)) |
2706 | if(DeleteClusterChain(fe.fp.FirstSectorOfFirstCluster)) |
2722 | { |
2707 | { |
2723 | // delete the directoryentry within the specified directory |
2708 | // delete the directoryentry within the specified directory |
2724 | if(DeleteDirectoryEntry(&(fe.fp))) retvalue = 1; |
2709 | if(DeleteDirectoryEntry(&(fe.fp))) retvalue = 1; |
2725 | } |
2710 | } |
2726 | } |
2711 | } |
2727 | } |
2712 | } |
2728 | } |
2713 | } |
2729 | 2714 | ||
2730 | // restore the actual path |
2715 | // restore the actual path |
2731 | Partition.CurrentWorkingDirectory = cwd; |
2716 | Partition.CurrentWorkingDirectory = cwd; |
2732 | 2717 | ||
2733 | return(retvalue); |
2718 | return(retvalue); |
2734 | } |
2719 | } |
2735 | 2720 | ||
2736 | 2721 | ||
2737 | /********************************************************************************************************************************************/ |
2722 | /********************************************************************************************************************************************/ |
2738 | /* Function: mkdir_(s8* dirpath); */ |
2723 | /* Function: mkdir_(s8* dirpath); */ |
2739 | /* */ |
2724 | /* */ |
2740 | /* Description: This function creates the directory with the specified pathname in the filesystem */ |
2725 | /* Description: This function creates the directory with the specified pathname in the filesystem */ |
2741 | /* */ |
2726 | /* */ |
2742 | /* */ |
2727 | /* */ |
2743 | /* Returnvalue: 1 : specified directory created succesfully 0: specified dir exist already */ |
2728 | /* Returnvalue: 1 : specified directory created succesfully 0: specified dir exist already */ |
2744 | /********************************************************************************************************************************************/ |
2729 | /********************************************************************************************************************************************/ |
2745 | 2730 | ||
2746 | u8 mkdir_(s8* const dirpath) |
2731 | u8 mkdir_(s8* const dirpath) |
2747 | { |
2732 | { |
2748 | u8 retvalue = 0; |
2733 | u8 retvalue = 0; |
2749 | File_t file; |
2734 | File_t file; |
2750 | 2735 | ||
2751 | if(dirpath == NULL) return(0); |
2736 | if(dirpath == NULL) return(0); |
2752 | // correct filepath formatting |
2737 | // correct filepath formatting |
2753 | Slashing_Path(dirpath); |
2738 | Slashing_Path(dirpath); |
2754 | file.FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
2739 | file.FirstSectorOfFirstCluster = SECTOR_UNDEFINED; // First sector of the first cluster of the file. |
2755 | file.FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
2740 | file.FirstSectorOfCurrCluster = SECTOR_UNDEFINED; // First sector of the cluster which is edited at the moment. |
2756 | file.FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
2741 | file.FirstSectorOfLastCluster = SECTOR_UNDEFINED; // First sector of the last cluster of the file |
2757 | file.SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
2742 | file.SectorOfCurrCluster = SECTOR_UNDEFINED; // The sector within the current cluster. |
2758 | file.ByteOfCurrSector = 0; // The byte location within the current sector. |
2743 | file.ByteOfCurrSector = 0; // The byte location within the current sector. |
2759 | file.Mode = 0; // Mode of fileoperation (read,write) |
2744 | file.Mode = 0; // Mode of fileoperation (read,write) |
2760 | file.Size = 0; // The size of the opend file in bytes. |
2745 | file.Size = 0; // The size of the opend file in bytes. |
2761 | file.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2746 | file.Position = 0; // Pointer to a character within the file 0 < fileposition < filesize |
2762 | file.DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
2747 | file.DirectorySector = SECTOR_UNDEFINED; // the sectorposition where the directoryentry has been made. |
2763 | file.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2748 | file.DirectoryIndex = 0; // The index to the directoryentry within the specified sector. |
2764 | file.Attribute = 0; // The attribute of the file opened. |
2749 | file.Attribute = 0; // The attribute of the file opened. |
2765 | file.SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
2750 | file.SectorInCache = SECTOR_UNDEFINED; // The last sector read, which is still in the sector cache. |
2766 | file.State = FSTATE_USED; // mark it as used |
2751 | file.State = FSTATE_USED; // mark it as used |
2767 | // if directory is not existent |
2752 | // if directory is not existent |
2768 | if(!FileExist(dirpath, ATTR_SUBDIRECTORY, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, &file)) |
2753 | if(!FileExist(dirpath, ATTR_SUBDIRECTORY, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, &file)) |
2769 | { |
2754 | { |
2770 | retvalue = FileCreate(dirpath, ATTR_SUBDIRECTORY, &file); |
2755 | retvalue = FileCreate(dirpath, ATTR_SUBDIRECTORY, &file); |
2771 | } |
2756 | } |
2772 | return(retvalue); |
2757 | return(retvalue); |
2773 | } |
2758 | } |
2774 | 2759 | ||
2775 | 2760 | ||
2776 | 2761 | ||
2777 | 2762 | ||
2778 | 2763 | ||
2779 | 2764 | ||
2780 | 2765 | ||
2781 | 2766 |