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203 | killagreg | 1 | /* |
1 | ingob | 2 | Copyright (C) 1993 Free Software Foundation |
3 | |||
4 | This file is part of the GNU IO Library. This library is free |
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5 | software; you can redistribute it and/or modify it under the |
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6 | terms of the GNU General Public License as published by the |
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7 | Free Software Foundation; either version 2, or (at your option) |
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8 | any later version. |
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9 | |||
10 | This library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | GNU General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU General Public License |
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16 | along with this library; see the file COPYING. If not, write to the Free |
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17 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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18 | |||
19 | As a special exception, if you link this library with files |
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20 | compiled with a GNU compiler to produce an executable, this does not cause |
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21 | the resulting executable to be covered by the GNU General Public License. |
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22 | This exception does not however invalidate any other reasons why |
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23 | the executable file might be covered by the GNU General Public License. */ |
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24 | |||
25 | /* |
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26 | * Copyright (c) 1990 Regents of the University of California. |
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27 | * All rights reserved. |
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28 | * |
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29 | * Redistribution and use in source and binary forms, with or without |
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30 | * modification, are permitted provided that the following conditions |
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31 | * are met: |
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32 | * 1. Redistributions of source code must retain the above copyright |
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33 | * notice, this list of conditions and the following disclaimer. |
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34 | * 2. Redistributions in binary form must reproduce the above copyright |
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35 | * notice, this list of conditions and the following disclaimer in the |
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36 | * documentation and/or other materials provided with the distribution. |
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37 | * 3. [rescinded 22 July 1999] |
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38 | * 4. Neither the name of the University nor the names of its contributors |
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39 | * may be used to endorse or promote products derived from this software |
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40 | * without specific prior written permission. |
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41 | * |
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42 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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43 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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46 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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47 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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48 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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49 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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50 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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51 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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52 | * SUCH DAMAGE. |
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53 | */ |
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54 | |||
55 | /* * **************************************************************************** |
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56 | This file is a patched version of printf called _printf_P |
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57 | It is made to work with avr-gcc for Atmel AVR MCUs. |
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58 | There are some differences from standard printf: |
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59 | 1. There is no floating point support (with fp the code is about 8K!) |
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60 | 2. Return type is void |
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61 | 3. Format string must be in program memory (by using macro printf this is |
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62 | done automaticaly) |
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63 | 4. %n is not implemented (just remove the comment around it if you need it) |
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64 | 5. If LIGHTPRINTF is defined, the code is about 550 bytes smaller and the |
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65 | folowing specifiers are disabled : |
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66 | space # * . - + p s o O |
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67 | 6. A function void uart_sendchar(char c) is used for output. The UART must |
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68 | be initialized before using printf. |
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69 | |||
70 | Alexander Popov |
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71 | sasho@vip.orbitel.bg |
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72 | ****************************************************************************** |
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73 | Changed file to work with LPC - ARM. |
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203 | killagreg | 74 | Ingo Busker |
1 | ingob | 75 | busker@mikrocontroller.com 02.2005 |
203 | killagreg | 76 | ******************************************************************************/ |
1 | ingob | 77 | |
203 | killagreg | 78 | |
1 | ingob | 79 | /* |
80 | * Actual printf innards. |
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81 | * |
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82 | * This code is large and complicated... |
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83 | */ |
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84 | |||
85 | #include <string.h> |
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86 | #ifdef __STDC__ |
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87 | #include <stdarg.h> |
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88 | #else |
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89 | #include <varargs.h> |
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90 | #endif |
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41 | ingob | 91 | #include "91x_lib.h" |
203 | killagreg | 92 | #include "printf_P.h" |
1 | ingob | 93 | |
203 | killagreg | 94 | void PRINT(pVoidFnctChar pPutchar, const char * ptr, unsigned int len) |
1 | ingob | 95 | { |
203 | killagreg | 96 | for(;len;len--) |
97 | (*pPutchar)(*ptr++); |
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1 | ingob | 98 | } |
99 | |||
203 | killagreg | 100 | void PRINTP(pVoidFnctChar pPutchar, const char * ptr, unsigned int len) |
101 | { |
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102 | for(;len;len--) |
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103 | (*pPutchar)(*ptr++); |
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1 | ingob | 104 | } |
105 | |||
203 | killagreg | 106 | void PAD_SP(pVoidFnctChar pPutchar, signed char howmany) { |
1 | ingob | 107 | for(;howmany>0;howmany--) |
203 | killagreg | 108 | (*pPutchar)(' '); |
1 | ingob | 109 | } |
110 | |||
203 | killagreg | 111 | void PAD_0(pVoidFnctChar pPutchar, signed char howmany) { |
1 | ingob | 112 | for(;howmany>0;howmany--) |
203 | killagreg | 113 | (*pPutchar)('0'); |
1 | ingob | 114 | } |
115 | |||
116 | #define BUF 40 |
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117 | |||
118 | /* |
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119 | * Macros for converting digits to letters and vice versa |
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120 | */ |
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121 | #define to_digit(c) ((c) - '0') |
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203 | killagreg | 122 | #define is_digit(c) ((c)<='9' && (c)>='0') |
1 | ingob | 123 | #define to_char(n) ((n) + '0') |
124 | |||
125 | /* |
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126 | * Flags used during conversion. |
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127 | */ |
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128 | #define LONGINT 0x01 /* long integer */ |
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129 | #define LONGDBL 0x02 /* long double; unimplemented */ |
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203 | killagreg | 130 | #define SHORTINT 0x04 /* short integer */ |
1 | ingob | 131 | #define ALT 0x08 /* alternate form */ |
132 | #define LADJUST 0x10 /* left adjustment */ |
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133 | #define ZEROPAD 0x20 /* zero (as opposed to blank) pad */ |
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134 | #define HEXPREFIX 0x40 /* add 0x or 0X prefix */ |
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135 | |||
203 | killagreg | 136 | void _printf_P (pVoidFnctChar pPutchar, char const *fmt0, ...) |
1 | ingob | 137 | { |
138 | va_list ap; |
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139 | register const char *fmt; /* format string */ |
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140 | register char ch; /* character from fmt */ |
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141 | register int n; /* handy integer (short term usage) */ |
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142 | register char *cp; /* handy char pointer (short term usage) */ |
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143 | const char *fmark; /* for remembering a place in fmt */ |
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144 | register unsigned char flags; /* flags as above */ |
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145 | signed char width; /* width from format (%8d), or 0 */ |
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146 | signed char prec; /* precision from format (%.3d), or -1 */ |
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147 | char sign; /* sign prefix (' ', '+', '-', or \0) */ |
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148 | unsigned long _ulong=0; /* integer arguments %[diouxX] */ |
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149 | #define OCT 8 |
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150 | #define DEC 10 |
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151 | #define HEX 16 |
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152 | unsigned char base; /* base for [diouxX] conversion */ |
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153 | signed char dprec; /* a copy of prec if [diouxX], 0 otherwise */ |
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154 | signed char dpad; /* extra 0 padding needed for integers */ |
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155 | signed char fieldsz; /* field size expanded by sign, dpad etc */ |
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156 | /* The initialization of 'size' is to suppress a warning that |
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157 | 'size' might be used unitialized. It seems gcc can't |
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158 | quite grok this spaghetti code ... */ |
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159 | signed char size = 0; /* size of converted field or string */ |
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160 | char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */ |
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161 | char ox[2]; /* space for 0x hex-prefix */ |
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162 | |||
203 | killagreg | 163 | if(pPutchar == NULL) return; |
164 | |||
1 | ingob | 165 | va_start(ap, fmt0); |
203 | killagreg | 166 | |
1 | ingob | 167 | fmt = fmt0; |
168 | |||
169 | /* |
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170 | * Scan the format for conversions (`%' character). |
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171 | */ |
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172 | for (;;) { |
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173 | for (fmark = fmt; (ch = (*fmt)) != '\0' && ch != '%'; fmt++) |
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174 | /* void */; |
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175 | if ((n = fmt - fmark) != 0) { |
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203 | killagreg | 176 | PRINTP(pPutchar, fmark, n); |
1 | ingob | 177 | } |
178 | if (ch == '\0') |
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179 | goto done; |
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180 | fmt++; /* skip over '%' */ |
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181 | |||
182 | flags = 0; |
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183 | dprec = 0; |
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184 | width = 0; |
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185 | prec = -1; |
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186 | sign = '\0'; |
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187 | |||
188 | rflag: ch = (*fmt++); |
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189 | reswitch: |
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190 | #ifdef LIGHTPRINTF |
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191 | if (ch=='o' || ch=='u' || (ch|0x20)=='x') { |
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192 | #else |
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193 | if (ch=='u' || (ch|0x20)=='x') { |
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194 | #endif |
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195 | if (flags&LONGINT) { |
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196 | _ulong=va_arg(ap, unsigned long); |
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197 | } else { |
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198 | register unsigned int _d; |
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199 | _d=va_arg(ap, unsigned int); |
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200 | _ulong = flags&SHORTINT ? (unsigned long)(unsigned short)_d : (unsigned long)_d; |
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201 | } |
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202 | } |
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203 | killagreg | 203 | |
1 | ingob | 204 | #ifndef LIGHTPRINTF |
205 | if(ch==' ') { |
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206 | /* |
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207 | * ``If the space and + flags both appear, the space |
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208 | * flag will be ignored.'' |
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209 | * -- ANSI X3J11 |
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210 | */ |
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211 | if (!sign) |
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212 | sign = ' '; |
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213 | goto rflag; |
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214 | } else if (ch=='#') { |
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215 | flags |= ALT; |
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216 | goto rflag; |
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217 | } else if (ch=='*'||ch=='-') { |
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218 | if (ch=='*') { |
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219 | /* |
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220 | * ``A negative field width argument is taken as a |
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221 | * - flag followed by a positive field width.'' |
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222 | * -- ANSI X3J11 |
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223 | * They don't exclude field widths read from args. |
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224 | */ |
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225 | if ((width = va_arg(ap, int)) >= 0) |
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226 | goto rflag; |
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227 | width = -width; |
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228 | } |
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229 | flags |= LADJUST; |
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230 | flags &= ~ZEROPAD; /* '-' disables '0' */ |
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231 | goto rflag; |
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232 | } else if (ch=='+') { |
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233 | sign = '+'; |
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234 | goto rflag; |
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235 | } else if (ch=='.') { |
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236 | if ((ch = (*fmt++)) == '*') { |
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237 | n = va_arg(ap, int); |
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238 | prec = n < 0 ? -1 : n; |
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239 | goto rflag; |
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240 | } |
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241 | n = 0; |
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242 | while (is_digit(ch)) { |
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243 | n = n*10 + to_digit(ch); |
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244 | ch = (*fmt++); |
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245 | } |
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246 | prec = n < 0 ? -1 : n; |
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247 | goto reswitch; |
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248 | } else |
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249 | #endif /* LIGHTPRINTF */ |
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250 | if (ch=='0') { |
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251 | /* |
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252 | * ``Note that 0 is taken as a flag, not as the |
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253 | * beginning of a field width.'' |
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254 | * -- ANSI X3J11 |
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255 | */ |
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256 | if (!(flags & LADJUST)) |
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257 | flags |= ZEROPAD; /* '-' disables '0' */ |
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258 | goto rflag; |
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259 | } else if (ch>='1' && ch<='9') { |
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260 | n = 0; |
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261 | do { |
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262 | n = 10 * n + to_digit(ch); |
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263 | ch = *fmt++; |
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264 | } while (is_digit(ch)); |
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265 | width = n; |
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266 | goto reswitch; |
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267 | } else if (ch=='h') { |
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268 | flags |= SHORTINT; |
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269 | goto rflag; |
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270 | } else if (ch=='l') { |
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271 | flags |= LONGINT; |
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272 | goto rflag; |
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273 | } else if (ch=='c') { |
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274 | *(cp = buf) = va_arg(ap, int); |
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275 | size = 1; |
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276 | sign = '\0'; |
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277 | } else if (ch=='D'||ch=='d'||ch=='i') { |
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278 | if(ch=='D') |
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279 | flags |= LONGINT; |
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280 | if (flags&LONGINT) { |
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281 | _ulong=va_arg(ap, long); |
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282 | } else { |
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283 | register int _d; |
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284 | _d=va_arg(ap, int); |
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285 | _ulong = flags&SHORTINT ? (long)(short)_d : (long)_d; |
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286 | } |
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203 | killagreg | 287 | |
1 | ingob | 288 | if ((long)_ulong < 0) { |
289 | _ulong = -_ulong; |
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290 | sign = '-'; |
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291 | } |
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292 | base = DEC; |
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293 | goto number; |
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294 | } else |
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203 | killagreg | 295 | /* |
1 | ingob | 296 | if (ch=='n') { |
297 | if (flags & LONGINT) |
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298 | *va_arg(ap, long *) = ret; |
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299 | else if (flags & SHORTINT) |
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300 | *va_arg(ap, short *) = ret; |
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301 | else |
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302 | *va_arg(ap, int *) = ret; |
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203 | killagreg | 303 | continue; // no output |
1 | ingob | 304 | } else |
305 | */ |
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203 | killagreg | 306 | #ifndef LIGHTPRINTF |
1 | ingob | 307 | if (ch=='O'||ch=='o') { |
308 | if (ch=='O') |
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309 | flags |= LONGINT; |
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310 | base = OCT; |
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311 | goto nosign; |
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312 | } else if (ch=='p') { |
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313 | /* |
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314 | * ``The argument shall be a pointer to void. The |
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315 | * value of the pointer is converted to a sequence |
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316 | * of printable characters, in an implementation- |
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317 | * defined manner.'' |
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318 | * -- ANSI X3J11 |
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319 | */ |
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320 | /* NOSTRICT */ |
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321 | _ulong = (unsigned int)va_arg(ap, void *); |
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322 | base = HEX; |
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323 | flags |= HEXPREFIX; |
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324 | ch = 'x'; |
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325 | goto nosign; |
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326 | } else if (ch=='s') { // print a string from RAM |
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327 | if ((cp = va_arg(ap, char *)) == NULL) { |
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328 | cp=buf; |
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329 | cp[0] = '('; |
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330 | cp[1] = 'n'; |
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331 | cp[2] = 'u'; |
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332 | cp[4] = cp[3] = 'l'; |
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333 | cp[5] = ')'; |
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334 | cp[6] = '\0'; |
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335 | } |
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336 | if (prec >= 0) { |
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337 | /* |
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338 | * can't use strlen; can only look for the |
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339 | * NUL in the first `prec' characters, and |
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340 | * strlen() will go further. |
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341 | */ |
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342 | char *p = (char*)memchr(cp, 0, prec); |
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343 | |||
344 | if (p != NULL) { |
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345 | size = p - cp; |
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346 | if (size > prec) |
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347 | size = prec; |
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348 | } else |
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349 | size = prec; |
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350 | } else |
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351 | size = strlen(cp); |
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352 | sign = '\0'; |
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353 | } else |
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203 | killagreg | 354 | #endif /* LIGHTPRINTF */ |
1 | ingob | 355 | if(ch=='U'||ch=='u') { |
356 | if (ch=='U') |
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357 | flags |= LONGINT; |
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358 | base = DEC; |
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359 | goto nosign; |
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360 | } else if (ch=='X'||ch=='x') { |
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361 | base = HEX; |
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362 | /* leading 0x/X only if non-zero */ |
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363 | if (flags & ALT && _ulong != 0) |
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364 | flags |= HEXPREFIX; |
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365 | |||
366 | /* unsigned conversions */ |
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367 | nosign: sign = '\0'; |
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368 | /* |
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369 | * ``... diouXx conversions ... if a precision is |
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370 | * specified, the 0 flag will be ignored.'' |
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371 | * -- ANSI X3J11 |
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372 | */ |
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373 | number: if ((dprec = prec) >= 0) |
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374 | flags &= ~ZEROPAD; |
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375 | |||
376 | /* |
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377 | * ``The result of converting a zero value with an |
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378 | * explicit precision of zero is no characters.'' |
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379 | * -- ANSI X3J11 |
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380 | */ |
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381 | cp = buf + BUF; |
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382 | if (_ulong != 0 || prec != 0) { |
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383 | register unsigned char _d,notlastdigit; |
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384 | do { |
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385 | notlastdigit=(_ulong>=base); |
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386 | _d = _ulong % base; |
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387 | |||
388 | if (_d<10) { |
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389 | _d+='0'; |
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390 | } else { |
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391 | _d+='a'-10; |
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392 | if (ch=='X') _d&=~0x20; |
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393 | } |
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394 | *--cp=_d; |
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395 | _ulong /= base; |
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396 | } while (notlastdigit); |
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397 | #ifndef LIGHTPRINTF |
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203 | killagreg | 398 | // handle octal leading 0 |
1 | ingob | 399 | if (base==OCT && flags & ALT && *cp != '0') |
400 | *--cp = '0'; |
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401 | #endif |
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402 | } |
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403 | |||
404 | size = buf + BUF - cp; |
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405 | } else { //default |
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406 | /* "%?" prints ?, unless ? is NUL */ |
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407 | if (ch == '\0') |
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408 | goto done; |
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409 | /* pretend it was %c with argument ch */ |
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410 | cp = buf; |
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411 | *cp = ch; |
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412 | size = 1; |
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413 | sign = '\0'; |
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414 | } |
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415 | |||
416 | /* |
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417 | * All reasonable formats wind up here. At this point, |
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418 | * `cp' points to a string which (if not flags&LADJUST) |
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419 | * should be padded out to `width' places. If |
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420 | * flags&ZEROPAD, it should first be prefixed by any |
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421 | * sign or other prefix; otherwise, it should be blank |
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422 | * padded before the prefix is emitted. After any |
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423 | * left-hand padding and prefixing, emit zeroes |
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424 | * required by a decimal [diouxX] precision, then print |
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425 | * the string proper, then emit zeroes required by any |
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426 | * leftover floating precision; finally, if LADJUST, |
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427 | * pad with blanks. |
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428 | */ |
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429 | |||
430 | /* |
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431 | * compute actual size, so we know how much to pad. |
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432 | */ |
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433 | fieldsz = size; |
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434 | |||
435 | dpad = dprec - size; |
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436 | if (dpad < 0) |
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437 | dpad = 0; |
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438 | |||
439 | if (sign) |
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440 | fieldsz++; |
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441 | else if (flags & HEXPREFIX) |
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442 | fieldsz += 2; |
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443 | fieldsz += dpad; |
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444 | |||
445 | /* right-adjusting blank padding */ |
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446 | if ((flags & (LADJUST|ZEROPAD)) == 0) |
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203 | killagreg | 447 | PAD_SP(pPutchar, width - fieldsz); |
1 | ingob | 448 | |
449 | /* prefix */ |
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450 | if (sign) { |
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203 | killagreg | 451 | PRINT(pPutchar, &sign, 1); |
1 | ingob | 452 | } else if (flags & HEXPREFIX) { |
453 | ox[0] = '0'; |
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454 | ox[1] = ch; |
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203 | killagreg | 455 | PRINT(pPutchar, ox, 2); |
1 | ingob | 456 | } |
457 | |||
458 | /* right-adjusting zero padding */ |
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459 | if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) |
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203 | killagreg | 460 | PAD_0(pPutchar, width - fieldsz); |
1 | ingob | 461 | |
462 | /* leading zeroes from decimal precision */ |
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203 | killagreg | 463 | PAD_0(pPutchar, dpad); |
1 | ingob | 464 | |
465 | /* the string or number proper */ |
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203 | killagreg | 466 | PRINT(pPutchar, cp, size); |
1 | ingob | 467 | |
468 | /* left-adjusting padding (always blank) */ |
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469 | if (flags & LADJUST) |
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203 | killagreg | 470 | PAD_SP(pPutchar, width - fieldsz); |
1 | ingob | 471 | } |
472 | done: |
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473 | va_end(ap); |
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474 | } |