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