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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | ingob | 1 | // Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist nicht von der Lizenz für den MikroKopter-Teil unterstellt |
| 2 | |||
| 3 | /* |
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| 4 | Copyright (C) 1993 Free Software Foundation |
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| 5 | |||
| 6 | This file is part of the GNU IO Library. This library is free |
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| 7 | software; you can redistribute it and/or modify it under the |
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| 8 | terms of the GNU General Public License as published by the |
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| 9 | Free Software Foundation; either version 2, or (at your option) |
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| 10 | any later version. |
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| 11 | |||
| 12 | This library is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with this library; see the file COPYING. If not, write to the Free |
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| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | |||
| 21 | As a special exception, if you link this library with files |
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| 22 | compiled with a GNU compiler to produce an executable, this does not cause |
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| 23 | the resulting executable to be covered by the GNU General Public License. |
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| 24 | This exception does not however invalidate any other reasons why |
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| 25 | the executable file might be covered by the GNU General Public License. */ |
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| 26 | |||
| 27 | /* |
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| 28 | * Copyright (c) 1990 Regents of the University of California. |
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| 29 | * All rights reserved. |
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| 30 | * |
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| 31 | * Redistribution and use in source and binary forms, with or without |
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| 32 | * modification, are permitted provided that the following conditions |
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| 33 | * are met: |
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| 34 | * 1. Redistributions of source code must retain the above copyright |
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| 35 | * notice, this list of conditions and the following disclaimer. |
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| 36 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 37 | * notice, this list of conditions and the following disclaimer in the |
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| 38 | * documentation and/or other materials provided with the distribution. |
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| 39 | * 3. [rescinded 22 July 1999] |
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| 40 | * 4. Neither the name of the University nor the names of its contributors |
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| 41 | * may be used to endorse or promote products derived from this software |
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| 42 | * without specific prior written permission. |
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| 43 | * |
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| 44 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 45 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 46 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 47 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 48 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 49 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 50 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 51 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 52 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 53 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 54 | * SUCH DAMAGE. |
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| 55 | */ |
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| 56 | |||
| 57 | /****************************************************************************** |
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| 58 | This file is a patched version of printf called _printf_P |
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| 59 | It is made to work with avr-gcc for Atmel AVR MCUs. |
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| 60 | There are some differences from standard printf: |
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| 61 | 1. There is no floating point support (with fp the code is about 8K!) |
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| 62 | 2. Return type is void |
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| 63 | 3. Format string must be in program memory (by using macro printf this is |
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| 64 | done automaticaly) |
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| 65 | 4. %n is not implemented (just remove the comment around it if you need it) |
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| 66 | 5. If LIGHTPRINTF is defined, the code is about 550 bytes smaller and the |
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| 67 | folowing specifiers are disabled : |
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| 68 | space # * . - + p s o O |
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| 69 | 6. A function void uart_sendchar(char c) is used for output. The UART must |
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| 70 | be initialized before using printf. |
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| 71 | |||
| 72 | Alexander Popov |
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| 73 | sasho@vip.orbitel.bg |
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| 74 | ******************************************************************************/ |
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| 75 | |||
| 76 | /* |
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| 77 | * Actual printf innards. |
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| 78 | * |
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| 79 | * This code is large and complicated... |
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| 80 | */ |
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| 81 | |||
| 82 | #include <string.h> |
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| 83 | #ifdef __STDC__ |
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| 84 | #include <stdarg.h> |
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| 85 | #else |
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| 86 | #include <varargs.h> |
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| 87 | #endif |
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| 88 | |||
| 89 | #include "main.h" |
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| 90 | |||
| 91 | |||
| 92 | //#define LIGHTPRINTF |
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| 93 | char PrintZiel; |
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| 94 | |||
| 95 | |||
| 96 | char Putchar(char zeichen) |
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| 97 | { |
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| 98 | if(PrintZiel == OUT_LCD) { DisplayBuff[DispPtr++] = zeichen; return(1);} |
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| 99 | else return(uart_putchar(zeichen)); |
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| 100 | } |
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| 101 | |||
| 102 | |||
| 103 | void PRINT(const char * ptr, unsigned int len) |
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| 104 | { |
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| 105 | for(;len;len--) Putchar(*ptr++); |
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| 106 | } |
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| 107 | |||
| 108 | void PRINTP(const char * ptr, unsigned int len) |
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| 109 | { |
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| 110 | for(;len;len--) Putchar(pgm_read_byte(ptr++)); |
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| 111 | } |
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| 112 | |||
| 113 | void PAD_SP(signed char howmany) |
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| 114 | { |
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| 115 | for(;howmany>0;howmany--) Putchar(' '); |
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| 116 | } |
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| 117 | |||
| 118 | void PAD_0(signed char howmany) |
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| 119 | { |
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| 120 | for(;howmany>0;howmany--) Putchar('0'); |
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| 121 | } |
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| 122 | |||
| 123 | #define BUF 40 |
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| 124 | |||
| 125 | /* |
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| 126 | * Macros for converting digits to letters and vice versa |
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| 127 | */ |
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| 128 | #define to_digit(c) ((c) - '0') |
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| 129 | #define is_digit(c) ((c)<='9' && (c)>='0') |
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| 130 | #define to_char(n) ((n) + '0') |
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| 131 | |||
| 132 | /* |
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| 133 | * Flags used during conversion. |
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| 134 | */ |
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| 135 | #define LONGINT 0x01 /* long integer */ |
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| 136 | #define LONGDBL 0x02 /* long double; unimplemented */ |
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| 137 | #define SHORTINT 0x04 /* short integer */ |
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| 138 | #define ALT 0x08 /* alternate form */ |
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| 139 | #define LADJUST 0x10 /* left adjustment */ |
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| 140 | #define ZEROPAD 0x20 /* zero (as opposed to blank) pad */ |
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| 141 | #define HEXPREFIX 0x40 /* add 0x or 0X prefix */ |
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| 142 | |||
| 143 | void _printf_P (char ziel,char const *fmt0, ...) /* Works with string from FLASH */ |
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| 144 | { |
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| 145 | va_list ap; |
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| 146 | register const char *fmt; /* format string */ |
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| 147 | register char ch; /* character from fmt */ |
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| 148 | register int n; /* handy integer (short term usage) */ |
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| 149 | register char *cp; /* handy char pointer (short term usage) */ |
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| 150 | const char *fmark; /* for remembering a place in fmt */ |
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| 151 | register unsigned char flags; /* flags as above */ |
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| 152 | signed char width; /* width from format (%8d), or 0 */ |
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| 153 | signed char prec; /* precision from format (%.3d), or -1 */ |
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| 154 | char sign; /* sign prefix (' ', '+', '-', or \0) */ |
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| 155 | unsigned long _ulong=0; /* integer arguments %[diouxX] */ |
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| 156 | #define OCT 8 |
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| 157 | #define DEC 10 |
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| 158 | #define HEX 16 |
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| 159 | unsigned char base; /* base for [diouxX] conversion */ |
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| 160 | signed char dprec; /* a copy of prec if [diouxX], 0 otherwise */ |
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| 161 | signed char dpad; /* extra 0 padding needed for integers */ |
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| 162 | signed char fieldsz; /* field size expanded by sign, dpad etc */ |
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| 163 | /* The initialization of 'size' is to suppress a warning that |
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| 164 | 'size' might be used unitialized. It seems gcc can't |
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| 165 | quite grok this spaghetti code ... */ |
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| 166 | signed char size = 0; /* size of converted field or string */ |
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| 167 | char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ |
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| 168 | char ox[2]; /* space for 0x hex-prefix */ |
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| 169 | |||
| 170 | PrintZiel = ziel; // bestimmt, LCD oder UART |
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| 171 | va_start(ap, fmt0); |
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| 172 | |||
| 173 | fmt = fmt0; |
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| 174 | |||
| 175 | /* |
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| 176 | * Scan the format for conversions (`%' character). |
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| 177 | */ |
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| 178 | for (;;) { |
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| 179 | for (fmark = fmt; (ch = pgm_read_byte(fmt)) != '\0' && ch != '%'; fmt++) |
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| 180 | /* void */; |
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| 181 | if ((n = fmt - fmark) != 0) { |
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| 182 | PRINTP(fmark, n); |
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| 183 | } |
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| 184 | if (ch == '\0') |
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| 185 | goto done; |
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| 186 | fmt++; /* skip over '%' */ |
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| 187 | |||
| 188 | flags = 0; |
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| 189 | dprec = 0; |
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| 190 | width = 0; |
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| 191 | prec = -1; |
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| 192 | sign = '\0'; |
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| 193 | |||
| 194 | rflag: ch = PRG_RDB(fmt++); |
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| 195 | reswitch: |
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| 196 | #ifdef LIGHTPRINTF |
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| 197 | if (ch=='o' || ch=='u' || (ch|0x20)=='x') { |
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| 198 | #else |
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| 199 | if (ch=='u' || (ch|0x20)=='x') { |
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| 200 | #endif |
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| 201 | if (flags&LONGINT) { |
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| 202 | _ulong=va_arg(ap, unsigned long); |
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| 203 | } else { |
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| 204 | register unsigned int _d; |
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| 205 | _d=va_arg(ap, unsigned int); |
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| 206 | _ulong = flags&SHORTINT ? (unsigned long)(unsigned short)_d : (unsigned long)_d; |
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| 207 | } |
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| 208 | } |
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| 209 | |||
| 210 | #ifndef LIGHTPRINTF |
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| 211 | if(ch==' ') { |
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| 212 | /* |
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| 213 | * ``If the space and + flags both appear, the space |
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| 214 | * flag will be ignored.'' |
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| 215 | * -- ANSI X3J11 |
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| 216 | */ |
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| 217 | if (!sign) |
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| 218 | sign = ' '; |
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| 219 | goto rflag; |
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| 220 | } else if (ch=='#') { |
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| 221 | flags |= ALT; |
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| 222 | goto rflag; |
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| 223 | } else if (ch=='*'||ch=='-') { |
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| 224 | if (ch=='*') { |
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| 225 | /* |
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| 226 | * ``A negative field width argument is taken as a |
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| 227 | * - flag followed by a positive field width.'' |
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| 228 | * -- ANSI X3J11 |
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| 229 | * They don't exclude field widths read from args. |
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| 230 | */ |
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| 231 | if ((width = va_arg(ap, int)) >= 0) |
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| 232 | goto rflag; |
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| 233 | width = -width; |
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| 234 | } |
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| 235 | flags |= LADJUST; |
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| 236 | flags &= ~ZEROPAD; /* '-' disables '0' */ |
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| 237 | goto rflag; |
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| 238 | } else if (ch=='+') { |
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| 239 | sign = '+'; |
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| 240 | goto rflag; |
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| 241 | } else if (ch=='.') { |
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| 242 | if ((ch = PRG_RDB(fmt++)) == '*') { |
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| 243 | n = va_arg(ap, int); |
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| 244 | prec = n < 0 ? -1 : n; |
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| 245 | goto rflag; |
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| 246 | } |
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| 247 | n = 0; |
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| 248 | while (is_digit(ch)) { |
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| 249 | n = n*10 + to_digit(ch); |
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| 250 | ch = PRG_RDB(fmt++); |
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| 251 | } |
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| 252 | prec = n < 0 ? -1 : n; |
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| 253 | goto reswitch; |
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| 254 | } else |
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| 255 | #endif /* LIGHTPRINTF */ |
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| 256 | if (ch=='0') { |
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| 257 | /* |
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| 258 | * ``Note that 0 is taken as a flag, not as the |
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| 259 | * beginning of a field width.'' |
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| 260 | * -- ANSI X3J11 |
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| 261 | */ |
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| 262 | if (!(flags & LADJUST)) |
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| 263 | flags |= ZEROPAD; /* '-' disables '0' */ |
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| 264 | goto rflag; |
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| 265 | } else if (ch>='1' && ch<='9') { |
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| 266 | n = 0; |
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| 267 | do { |
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| 268 | n = 10 * n + to_digit(ch); |
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| 269 | ch = PRG_RDB(fmt++); |
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| 270 | } while (is_digit(ch)); |
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| 271 | width = n; |
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| 272 | goto reswitch; |
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| 273 | } else if (ch=='h') { |
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| 274 | flags |= SHORTINT; |
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| 275 | goto rflag; |
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| 276 | } else if (ch=='l') { |
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| 277 | flags |= LONGINT; |
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| 278 | goto rflag; |
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| 279 | } else if (ch=='c') { |
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| 280 | *(cp = buf) = va_arg(ap, int); |
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| 281 | size = 1; |
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| 282 | sign = '\0'; |
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| 283 | } else if (ch=='D'||ch=='d'||ch=='i') { |
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| 284 | if(ch=='D') |
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| 285 | flags |= LONGINT; |
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| 286 | if (flags&LONGINT) { |
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| 287 | _ulong=va_arg(ap, long); |
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| 288 | } else { |
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| 289 | register int _d; |
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| 290 | _d=va_arg(ap, int); |
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| 291 | _ulong = flags&SHORTINT ? (long)(short)_d : (long)_d; |
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| 292 | } |
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| 293 | |||
| 294 | if ((long)_ulong < 0) { |
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| 295 | _ulong = -_ulong; |
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| 296 | sign = '-'; |
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| 297 | } |
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| 298 | base = DEC; |
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| 299 | goto number; |
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| 300 | } else |
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| 301 | /* |
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| 302 | if (ch=='n') { |
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| 303 | if (flags & LONGINT) |
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| 304 | *va_arg(ap, long *) = ret; |
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| 305 | else if (flags & SHORTINT) |
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| 306 | *va_arg(ap, short *) = ret; |
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| 307 | else |
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| 308 | *va_arg(ap, int *) = ret; |
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| 309 | continue; // no output |
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| 310 | } else |
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| 311 | */ |
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| 312 | #ifndef LIGHTPRINTF |
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| 313 | if (ch=='O'||ch=='o') { |
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| 314 | if (ch=='O') |
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| 315 | flags |= LONGINT; |
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| 316 | base = OCT; |
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| 317 | goto nosign; |
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| 318 | } else if (ch=='p') { |
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| 319 | /* |
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| 320 | * ``The argument shall be a pointer to void. The |
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| 321 | * value of the pointer is converted to a sequence |
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| 322 | * of printable characters, in an implementation- |
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| 323 | * defined manner.'' |
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| 324 | * -- ANSI X3J11 |
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| 325 | */ |
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| 326 | /* NOSTRICT */ |
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| 327 | _ulong = (unsigned int)va_arg(ap, void *); |
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| 328 | base = HEX; |
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| 329 | flags |= HEXPREFIX; |
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| 330 | ch = 'x'; |
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| 331 | goto nosign; |
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| 332 | } else if (ch=='s') { // print a string from RAM |
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| 333 | if ((cp = va_arg(ap, char *)) == NULL) { |
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| 334 | cp=buf; |
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| 335 | cp[0] = '('; |
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| 336 | cp[1] = 'n'; |
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| 337 | cp[2] = 'u'; |
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| 338 | cp[4] = cp[3] = 'l'; |
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| 339 | cp[5] = ')'; |
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| 340 | cp[6] = '\0'; |
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| 341 | } |
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| 342 | if (prec >= 0) { |
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| 343 | /* |
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| 344 | * can't use strlen; can only look for the |
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| 345 | * NUL in the first `prec' characters, and |
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| 346 | * strlen() will go further. |
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| 347 | */ |
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| 348 | char *p = (char*)memchr(cp, 0, prec); |
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| 349 | |||
| 350 | if (p != NULL) { |
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| 351 | size = p - cp; |
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| 352 | if (size > prec) |
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| 353 | size = prec; |
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| 354 | } else |
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| 355 | size = prec; |
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| 356 | } else |
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| 357 | size = strlen(cp); |
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| 358 | sign = '\0'; |
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| 359 | } else |
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| 360 | #endif /* LIGHTPRINTF */ |
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| 361 | if(ch=='U'||ch=='u') { |
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| 362 | if (ch=='U') |
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| 363 | flags |= LONGINT; |
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| 364 | base = DEC; |
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| 365 | goto nosign; |
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| 366 | } else if (ch=='X'||ch=='x') { |
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| 367 | base = HEX; |
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| 368 | /* leading 0x/X only if non-zero */ |
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| 369 | if (flags & ALT && _ulong != 0) |
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| 370 | flags |= HEXPREFIX; |
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| 371 | |||
| 372 | /* unsigned conversions */ |
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| 373 | nosign: sign = '\0'; |
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| 374 | /* |
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| 375 | * ``... diouXx conversions ... if a precision is |
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| 376 | * specified, the 0 flag will be ignored.'' |
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| 377 | * -- ANSI X3J11 |
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| 378 | */ |
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| 379 | number: if ((dprec = prec) >= 0) |
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| 380 | flags &= ~ZEROPAD; |
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| 381 | |||
| 382 | /* |
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| 383 | * ``The result of converting a zero value with an |
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| 384 | * explicit precision of zero is no characters.'' |
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| 385 | * -- ANSI X3J11 |
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| 386 | */ |
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| 387 | cp = buf + BUF; |
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| 388 | if (_ulong != 0 || prec != 0) { |
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| 389 | register unsigned char _d,notlastdigit; |
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| 390 | do { |
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| 391 | notlastdigit=(_ulong>=base); |
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| 392 | _d = _ulong % base; |
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| 393 | |||
| 394 | if (_d<10) { |
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| 395 | _d+='0'; |
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| 396 | } else { |
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| 397 | _d+='a'-10; |
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| 398 | if (ch=='X') _d&=~0x20; |
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| 399 | } |
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| 400 | *--cp=_d; |
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| 401 | _ulong /= base; |
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| 402 | } while (notlastdigit); |
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| 403 | #ifndef LIGHTPRINTF |
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| 404 | // handle octal leading 0 |
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| 405 | if (base==OCT && flags & ALT && *cp != '0') |
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| 406 | *--cp = '0'; |
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| 407 | #endif |
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| 408 | } |
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| 409 | |||
| 410 | size = buf + BUF - cp; |
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| 411 | } else { //default |
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| 412 | /* "%?" prints ?, unless ? is NUL */ |
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| 413 | if (ch == '\0') |
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| 414 | goto done; |
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| 415 | /* pretend it was %c with argument ch */ |
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| 416 | cp = buf; |
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| 417 | *cp = ch; |
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| 418 | size = 1; |
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| 419 | sign = '\0'; |
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| 420 | } |
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| 421 | |||
| 422 | /* |
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| 423 | * All reasonable formats wind up here. At this point, |
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| 424 | * `cp' points to a string which (if not flags&LADJUST) |
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| 425 | * should be padded out to `width' places. If |
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| 426 | * flags&ZEROPAD, it should first be prefixed by any |
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| 427 | * sign or other prefix; otherwise, it should be blank |
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| 428 | * padded before the prefix is emitted. After any |
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| 429 | * left-hand padding and prefixing, emit zeroes |
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| 430 | * required by a decimal [diouxX] precision, then print |
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| 431 | * the string proper, then emit zeroes required by any |
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| 432 | * leftover floating precision; finally, if LADJUST, |
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| 433 | * pad with blanks. |
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| 434 | */ |
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| 435 | |||
| 436 | /* |
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| 437 | * compute actual size, so we know how much to pad. |
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| 438 | */ |
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| 439 | fieldsz = size; |
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| 440 | |||
| 441 | dpad = dprec - size; |
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| 442 | if (dpad < 0) |
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| 443 | dpad = 0; |
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| 444 | |||
| 445 | if (sign) |
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| 446 | fieldsz++; |
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| 447 | else if (flags & HEXPREFIX) |
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| 448 | fieldsz += 2; |
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| 449 | fieldsz += dpad; |
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| 450 | |||
| 451 | /* right-adjusting blank padding */ |
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| 452 | if ((flags & (LADJUST|ZEROPAD)) == 0) |
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| 453 | PAD_SP(width - fieldsz); |
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| 454 | |||
| 455 | /* prefix */ |
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| 456 | if (sign) { |
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| 457 | PRINT(&sign, 1); |
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| 458 | } else if (flags & HEXPREFIX) { |
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| 459 | ox[0] = '0'; |
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| 460 | ox[1] = ch; |
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| 461 | PRINT(ox, 2); |
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| 462 | } |
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| 463 | |||
| 464 | /* right-adjusting zero padding */ |
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| 465 | if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) |
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| 466 | PAD_0(width - fieldsz); |
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| 467 | |||
| 468 | /* leading zeroes from decimal precision */ |
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| 469 | PAD_0(dpad); |
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| 470 | |||
| 471 | /* the string or number proper */ |
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| 472 | PRINT(cp, size); |
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| 473 | |||
| 474 | /* left-adjusting padding (always blank) */ |
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| 475 | if (flags & LADJUST) |
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| 476 | PAD_SP(width - fieldsz); |
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| 477 | } |
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| 478 | done: |
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| 479 | va_end(ap); |
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| 480 | } |