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58 | killagreg | 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 "old_macros.h" |
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90 | #include "printf_P.h" |
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91 | |||
92 | |||
72 | killagreg | 93 | void PRINT(pVoidFnctChar pPutchar, const char * ptr, unsigned int len) |
58 | killagreg | 94 | { |
72 | killagreg | 95 | for(;len;len--) (*pPutchar)(*ptr++); |
58 | killagreg | 96 | } |
97 | |||
72 | killagreg | 98 | void PRINTP(pVoidFnctChar pPutchar, const char * ptr, unsigned int len) |
58 | killagreg | 99 | { |
72 | killagreg | 100 | for(;len;len--) (*pPutchar)(pgm_read_byte(ptr++)); |
58 | killagreg | 101 | } |
102 | |||
72 | killagreg | 103 | void PAD_SP(pVoidFnctChar pPutchar, signed char howmany) |
58 | killagreg | 104 | { |
72 | killagreg | 105 | for(;howmany>0;howmany--) (*pPutchar)(' '); |
58 | killagreg | 106 | } |
107 | |||
72 | killagreg | 108 | void PAD_0(pVoidFnctChar pPutchar, signed char howmany) |
58 | killagreg | 109 | { |
72 | killagreg | 110 | for(;howmany>0;howmany--) (*pPutchar)('0'); |
58 | killagreg | 111 | } |
112 | |||
113 | #define BUF 40 |
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114 | |||
115 | /* |
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116 | * Macros for converting digits to letters and vice versa |
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117 | */ |
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118 | #define to_digit(c) ((c) - '0') |
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72 | killagreg | 119 | #define is_digit(c) ((c)<='9' && (c)>='0') |
58 | killagreg | 120 | #define to_char(n) ((n) + '0') |
121 | |||
122 | /* |
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123 | * Flags used during conversion. |
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124 | */ |
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125 | #define LONGINT 0x01 /* long integer */ |
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126 | #define LONGDBL 0x02 /* long double; unimplemented */ |
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72 | killagreg | 127 | #define SHORTINT 0x04 /* short integer */ |
58 | killagreg | 128 | #define ALT 0x08 /* alternate form */ |
129 | #define LADJUST 0x10 /* left adjustment */ |
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130 | #define ZEROPAD 0x20 /* zero (as opposed to blank) pad */ |
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131 | #define HEXPREFIX 0x40 /* add 0x or 0X prefix */ |
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132 | |||
72 | killagreg | 133 | void _printf_P (pVoidFnctChar pPutchar, char const *fmt0, ...) /* Works with string from FLASH */ |
58 | killagreg | 134 | { |
135 | va_list ap; |
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136 | register const char *fmt; /* format string */ |
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137 | register char ch; /* character from fmt */ |
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138 | register int n; /* handy integer (short term usage) */ |
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139 | register char *cp; /* handy char pointer (short term usage) */ |
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140 | const char *fmark; /* for remembering a place in fmt */ |
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141 | register unsigned char flags; /* flags as above */ |
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142 | signed char width; /* width from format (%8d), or 0 */ |
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143 | signed char prec; /* precision from format (%.3d), or -1 */ |
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144 | char sign; /* sign prefix (' ', '+', '-', or \0) */ |
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145 | unsigned long _ulong=0; /* integer arguments %[diouxX] */ |
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146 | #define OCT 8 |
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147 | #define DEC 10 |
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148 | #define HEX 16 |
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149 | unsigned char base; /* base for [diouxX] conversion */ |
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150 | signed char dprec; /* a copy of prec if [diouxX], 0 otherwise */ |
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151 | signed char dpad; /* extra 0 padding needed for integers */ |
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152 | signed char fieldsz; /* field size expanded by sign, dpad etc */ |
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153 | /* The initialization of 'size' is to suppress a warning that |
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154 | 'size' might be used unitialized. It seems gcc can't |
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155 | quite grok this spaghetti code ... */ |
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156 | signed char size = 0; /* size of converted field or string */ |
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157 | char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ |
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158 | char ox[2]; /* space for 0x hex-prefix */ |
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159 | |||
160 | va_start(ap, fmt0); |
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161 | |||
162 | fmt = fmt0; |
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163 | |||
164 | /* |
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165 | * Scan the format for conversions (`%' character). |
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166 | */ |
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167 | for (;;) { |
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168 | for (fmark = fmt; (ch = pgm_read_byte(fmt)) != '\0' && ch != '%'; fmt++) |
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169 | /* void */; |
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170 | if ((n = fmt - fmark) != 0) { |
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72 | killagreg | 171 | PRINTP(pPutchar, fmark, n); |
58 | killagreg | 172 | } |
173 | if (ch == '\0') |
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174 | goto done; |
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175 | fmt++; /* skip over '%' */ |
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176 | |||
177 | flags = 0; |
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178 | dprec = 0; |
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179 | width = 0; |
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180 | prec = -1; |
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181 | sign = '\0'; |
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182 | |||
183 | rflag: ch = PRG_RDB(fmt++); |
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184 | reswitch: |
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185 | #ifdef LIGHTPRINTF |
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186 | if (ch=='o' || ch=='u' || (ch|0x20)=='x') { |
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187 | #else |
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188 | if (ch=='u' || (ch|0x20)=='x') { |
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189 | #endif |
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190 | if (flags&LONGINT) { |
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191 | _ulong=va_arg(ap, unsigned long); |
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192 | } else { |
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193 | register unsigned int _d; |
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194 | _d=va_arg(ap, unsigned int); |
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195 | _ulong = flags&SHORTINT ? (unsigned long)(unsigned short)_d : (unsigned long)_d; |
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196 | } |
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197 | } |
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198 | |||
199 | #ifndef LIGHTPRINTF |
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200 | if(ch==' ') { |
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201 | /* |
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202 | * ``If the space and + flags both appear, the space |
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203 | * flag will be ignored.'' |
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204 | * -- ANSI X3J11 |
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205 | */ |
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206 | if (!sign) |
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207 | sign = ' '; |
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208 | goto rflag; |
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209 | } else if (ch=='#') { |
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210 | flags |= ALT; |
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211 | goto rflag; |
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212 | } else if (ch=='*'||ch=='-') { |
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213 | if (ch=='*') { |
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214 | /* |
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215 | * ``A negative field width argument is taken as a |
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216 | * - flag followed by a positive field width.'' |
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217 | * -- ANSI X3J11 |
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218 | * They don't exclude field widths read from args. |
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219 | */ |
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220 | if ((width = va_arg(ap, int)) >= 0) |
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221 | goto rflag; |
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222 | width = -width; |
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223 | } |
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224 | flags |= LADJUST; |
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225 | flags &= ~ZEROPAD; /* '-' disables '0' */ |
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226 | goto rflag; |
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227 | } else if (ch=='+') { |
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228 | sign = '+'; |
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229 | goto rflag; |
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230 | } else if (ch=='.') { |
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231 | if ((ch = PRG_RDB(fmt++)) == '*') { |
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232 | n = va_arg(ap, int); |
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233 | prec = n < 0 ? -1 : n; |
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234 | goto rflag; |
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235 | } |
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236 | n = 0; |
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237 | while (is_digit(ch)) { |
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238 | n = n*10 + to_digit(ch); |
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239 | ch = PRG_RDB(fmt++); |
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240 | } |
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241 | prec = n < 0 ? -1 : n; |
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242 | goto reswitch; |
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243 | } else |
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244 | #endif /* LIGHTPRINTF */ |
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245 | if (ch=='0') { |
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246 | /* |
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247 | * ``Note that 0 is taken as a flag, not as the |
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248 | * beginning of a field width.'' |
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249 | * -- ANSI X3J11 |
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250 | */ |
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251 | if (!(flags & LADJUST)) |
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252 | flags |= ZEROPAD; /* '-' disables '0' */ |
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253 | goto rflag; |
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254 | } else if (ch>='1' && ch<='9') { |
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255 | n = 0; |
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256 | do { |
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257 | n = 10 * n + to_digit(ch); |
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258 | ch = PRG_RDB(fmt++); |
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259 | } while (is_digit(ch)); |
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260 | width = n; |
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261 | goto reswitch; |
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262 | } else if (ch=='h') { |
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263 | flags |= SHORTINT; |
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264 | goto rflag; |
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265 | } else if (ch=='l') { |
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266 | flags |= LONGINT; |
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267 | goto rflag; |
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268 | } else if (ch=='c') { |
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269 | *(cp = buf) = va_arg(ap, int); |
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270 | size = 1; |
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271 | sign = '\0'; |
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272 | } else if (ch=='D'||ch=='d'||ch=='i') { |
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273 | if(ch=='D') |
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274 | flags |= LONGINT; |
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275 | if (flags&LONGINT) { |
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276 | _ulong=va_arg(ap, long); |
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277 | } else { |
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278 | register int _d; |
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279 | _d=va_arg(ap, int); |
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280 | _ulong = flags&SHORTINT ? (long)(short)_d : (long)_d; |
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281 | } |
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282 | |||
283 | if ((long)_ulong < 0) { |
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284 | _ulong = -_ulong; |
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285 | sign = '-'; |
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286 | } |
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287 | base = DEC; |
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288 | goto number; |
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289 | } else |
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290 | /* |
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291 | if (ch=='n') { |
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292 | if (flags & LONGINT) |
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293 | *va_arg(ap, long *) = ret; |
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294 | else if (flags & SHORTINT) |
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295 | *va_arg(ap, short *) = ret; |
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296 | else |
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297 | *va_arg(ap, int *) = ret; |
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298 | continue; // no output |
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299 | } else |
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300 | */ |
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301 | #ifndef LIGHTPRINTF |
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302 | if (ch=='O'||ch=='o') { |
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303 | if (ch=='O') |
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304 | flags |= LONGINT; |
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305 | base = OCT; |
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306 | goto nosign; |
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307 | } else if (ch=='p') { |
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308 | /* |
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309 | * ``The argument shall be a pointer to void. The |
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310 | * value of the pointer is converted to a sequence |
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311 | * of printable characters, in an implementation- |
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312 | * defined manner.'' |
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313 | * -- ANSI X3J11 |
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314 | */ |
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315 | /* NOSTRICT */ |
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316 | _ulong = (unsigned int)va_arg(ap, void *); |
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317 | base = HEX; |
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318 | flags |= HEXPREFIX; |
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319 | ch = 'x'; |
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320 | goto nosign; |
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321 | } else if (ch=='s') { // print a string from RAM |
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322 | if ((cp = va_arg(ap, char *)) == NULL) { |
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323 | cp=buf; |
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324 | cp[0] = '('; |
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325 | cp[1] = 'n'; |
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326 | cp[2] = 'u'; |
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327 | cp[4] = cp[3] = 'l'; |
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328 | cp[5] = ')'; |
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329 | cp[6] = '\0'; |
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330 | } |
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331 | if (prec >= 0) { |
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332 | /* |
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333 | * can't use strlen; can only look for the |
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334 | * NUL in the first `prec' characters, and |
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335 | * strlen() will go further. |
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336 | */ |
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337 | char *p = (char*)memchr(cp, 0, prec); |
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338 | |||
339 | if (p != NULL) { |
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340 | size = p - cp; |
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341 | if (size > prec) |
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342 | size = prec; |
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343 | } else |
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344 | size = prec; |
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345 | } else |
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346 | size = strlen(cp); |
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347 | sign = '\0'; |
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348 | } else |
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349 | #endif /* LIGHTPRINTF */ |
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350 | if(ch=='U'||ch=='u') { |
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351 | if (ch=='U') |
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352 | flags |= LONGINT; |
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353 | base = DEC; |
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354 | goto nosign; |
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355 | } else if (ch=='X'||ch=='x') { |
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356 | base = HEX; |
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357 | /* leading 0x/X only if non-zero */ |
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358 | if (flags & ALT && _ulong != 0) |
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359 | flags |= HEXPREFIX; |
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360 | |||
361 | /* unsigned conversions */ |
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362 | nosign: sign = '\0'; |
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363 | /* |
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364 | * ``... diouXx conversions ... if a precision is |
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365 | * specified, the 0 flag will be ignored.'' |
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366 | * -- ANSI X3J11 |
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367 | */ |
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368 | number: if ((dprec = prec) >= 0) |
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369 | flags &= ~ZEROPAD; |
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370 | |||
371 | /* |
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372 | * ``The result of converting a zero value with an |
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373 | * explicit precision of zero is no characters.'' |
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374 | * -- ANSI X3J11 |
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375 | */ |
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376 | cp = buf + BUF; |
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377 | if (_ulong != 0 || prec != 0) { |
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378 | register unsigned char _d,notlastdigit; |
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379 | do { |
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380 | notlastdigit=(_ulong>=base); |
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381 | _d = _ulong % base; |
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382 | |||
383 | if (_d<10) { |
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384 | _d+='0'; |
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385 | } else { |
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386 | _d+='a'-10; |
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387 | if (ch=='X') _d&=~0x20; |
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388 | } |
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389 | *--cp=_d; |
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390 | _ulong /= base; |
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391 | } while (notlastdigit); |
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392 | #ifndef LIGHTPRINTF |
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393 | // handle octal leading 0 |
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394 | if (base==OCT && flags & ALT && *cp != '0') |
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395 | *--cp = '0'; |
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396 | #endif |
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397 | } |
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398 | |||
399 | size = buf + BUF - cp; |
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400 | } else { //default |
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401 | /* "%?" prints ?, unless ? is NUL */ |
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402 | if (ch == '\0') |
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403 | goto done; |
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404 | /* pretend it was %c with argument ch */ |
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405 | cp = buf; |
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406 | *cp = ch; |
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407 | size = 1; |
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408 | sign = '\0'; |
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409 | } |
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410 | |||
411 | /* |
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412 | * All reasonable formats wind up here. At this point, |
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413 | * `cp' points to a string which (if not flags&LADJUST) |
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414 | * should be padded out to `width' places. If |
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415 | * flags&ZEROPAD, it should first be prefixed by any |
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416 | * sign or other prefix; otherwise, it should be blank |
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417 | * padded before the prefix is emitted. After any |
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418 | * left-hand padding and prefixing, emit zeroes |
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419 | * required by a decimal [diouxX] precision, then print |
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420 | * the string proper, then emit zeroes required by any |
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421 | * leftover floating precision; finally, if LADJUST, |
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422 | * pad with blanks. |
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423 | */ |
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424 | |||
425 | /* |
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426 | * compute actual size, so we know how much to pad. |
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427 | */ |
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428 | fieldsz = size; |
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429 | |||
430 | dpad = dprec - size; |
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431 | if (dpad < 0) |
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432 | dpad = 0; |
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433 | |||
434 | if (sign) |
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435 | fieldsz++; |
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436 | else if (flags & HEXPREFIX) |
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437 | fieldsz += 2; |
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438 | fieldsz += dpad; |
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439 | |||
440 | /* right-adjusting blank padding */ |
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441 | if ((flags & (LADJUST|ZEROPAD)) == 0) |
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72 | killagreg | 442 | PAD_SP(pPutchar, width - fieldsz); |
58 | killagreg | 443 | |
444 | /* prefix */ |
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445 | if (sign) { |
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72 | killagreg | 446 | PRINT(pPutchar, &sign, 1); |
58 | killagreg | 447 | } else if (flags & HEXPREFIX) { |
448 | ox[0] = '0'; |
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449 | ox[1] = ch; |
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72 | killagreg | 450 | PRINT(pPutchar, ox, 2); |
58 | killagreg | 451 | } |
452 | |||
453 | /* right-adjusting zero padding */ |
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454 | if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) |
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72 | killagreg | 455 | PAD_0(pPutchar, width - fieldsz); |
58 | killagreg | 456 | |
457 | /* leading zeroes from decimal precision */ |
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72 | killagreg | 458 | PAD_0(pPutchar, dpad); |
58 | killagreg | 459 | |
460 | /* the string or number proper */ |
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72 | killagreg | 461 | PRINT(pPutchar, cp, size); |
58 | killagreg | 462 | |
463 | /* left-adjusting padding (always blank) */ |
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464 | if (flags & LADJUST) |
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72 | killagreg | 465 | PAD_SP(pPutchar, width - fieldsz); |
58 | killagreg | 466 | } |
467 | done: |
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468 | va_end(ap); |
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469 | } |