1#include <config.h>
| 1/* snprintf - compatibility implementation of snprintf, vsnprintf 2 * 3 * Copyright (c) 2013, NLnet Labs. All rights reserved. 4 * 5 * This software is open source. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * Redistributions in binary form must reproduce the above copyright notice, 15 * this list of conditions and the following disclaimer in the documentation 16 * and/or other materials provided with the distribution. 17 * 18 * Neither the name of the NLNET LABS nor the names of its contributors may 19 * be used to endorse or promote products derived from this software without 20 * specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */
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2
| 34
|
3#ifndef HAVE_SNPRINTF 4
| 35#include "config.h" 36#include <stdio.h>
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5#include <ctype.h>
| 37#include <ctype.h>
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6#include <sys/types.h>
| 38#include <string.h> 39#include <stdarg.h> 40#include <stdlib.h> 41#include <errno.h> 42#ifdef HAVE_STDINT_H 43#include <stdint.h> 44#endif
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7
| 45
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8/* Define this as a fall through, HAVE_STDARG_H is probably already set */
| 46/* for test */ 47/* #define SNPRINTF_TEST 1 */ 48#ifdef SNPRINTF_TEST 49#define snprintf my_snprintf 50#define vsnprintf my_vsnprintf 51#endif /* SNPRINTF_TEST */
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9
| 52
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10#define HAVE_VARARGS_H
| 53int snprintf(char* str, size_t size, const char* format, ...); 54int vsnprintf(char* str, size_t size, const char* format, va_list arg);
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11
| 55
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12/************************************************************** 13 * Original: 14 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995 15 * A bombproof version of doprnt (dopr) included. 16 * Sigh. This sort of thing is always nasty do deal with. Note that 17 * the version here does not include floating point...
| 56/** 57 * Very portable snprintf implementation, limited in functionality, 58 * esp. for %[capital] %[nonportable] and so on. Reduced float functionality, 59 * mostly in formatting and range (e+-16), for %f and %g.
|
18 *
| 60 *
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19 * snprintf() is used instead of sprintf() as it does limit checks 20 * for string length. This covers a nasty loophole. 21 * 22 * The other functions are there to prevent NULL pointers from 23 * causing nast effects. 24 * 25 * More Recently: 26 * Brandon Long (blong@fiction.net) 9/15/96 for mutt 0.43 27 * This was ugly. It is still ugly. I opted out of floating point 28 * numbers, but the formatter understands just about everything 29 * from the normal C string format, at least as far as I can tell from 30 * the Solaris 2.5 printf(3S) man page. 31 * 32 * Brandon Long (blong@fiction.net) 10/22/97 for mutt 0.87.1 33 * Ok, added some minimal floating point support, which means this 34 * probably requires libm on most operating systems. Don't yet 35 * support the exponent (e,E) and sigfig (g,G). Also, fmtint() 36 * was pretty badly broken, it just wasn't being exercised in ways 37 * which showed it, so that's been fixed. Also, formated the code 38 * to mutt conventions, and removed dead code left over from the 39 * original. Also, there is now a builtin-test, just compile with: 40 * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm 41 * and run snprintf for results. 42 * 43 * Wouter Wijngaards(wouter@nlnetlabs.nl) 2/09/2010 for unbound. 44 * Limited support for %g. Does not do the exponents for the before-dot. 45 * 46 **************************************************************/
| 61 * %s, %d, %u, %i, %x, %c, %n and %% are fully supported. 62 * This includes width, precision, flags 0- +, and *(arg for wid,prec). 63 * %f, %g, %m, %p have reduced support, support for wid,prec,flags,*, but 64 * less floating point range, no %e formatting for %g. 65 */ 66int snprintf(char* str, size_t size, const char* format, ...) 67{ 68 int r; 69 va_list args; 70 va_start(args, format); 71 r = vsnprintf(str, size, format, args); 72 va_end(args); 73 return r; 74}
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47
| 75
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| 76/** add padding to string */ 77static void 78print_pad(char** at, size_t* left, int* ret, char p, int num) 79{ 80 while(num--) { 81 if(*left > 1) { 82 *(*at)++ = p; 83 (*left)--; 84 } 85 (*ret)++; 86 } 87}
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48
| 88
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49/* varargs declarations: */
| 89/** get negative symbol, 0 if none */ 90static char 91get_negsign(int negative, int plus, int space) 92{ 93 if(negative) 94 return '-'; 95 if(plus) 96 return '+'; 97 if(space) 98 return ' '; 99 return 0; 100}
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50
| 101
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51#if defined(HAVE_STDARG_H) 52# include <stdarg.h> 53# define HAVE_STDARGS /* let's hope that works everywhere (mj) */ 54# define VA_LOCAL_DECL va_list ap 55# define VA_START(f) va_start(ap, f) 56# define VA_SHIFT(v,t) ; /* no-op for ANSI */ 57# define VA_END va_end(ap) 58#else 59# if defined(HAVE_VARARGS_H) 60# include <varargs.h> 61# undef HAVE_STDARGS 62# define VA_LOCAL_DECL va_list ap 63# define VA_START(f) va_start(ap) /* f is ignored! */ 64# define VA_SHIFT(v,t) v = va_arg(ap,t) 65# define VA_END va_end(ap) 66# else 67/*XX ** NO VARARGS ** XX*/ 68# endif 69#endif
| 102#define PRINT_DEC_BUFSZ 32 /* 20 is enough for 64 bit decimals */ 103/** print decimal into buffer, returns length */ 104static int 105print_dec(char* buf, int max, unsigned int value) 106{ 107 int i = 0; 108 if(value == 0) { 109 if(max > 0) { 110 buf[0] = '0'; 111 i = 1; 112 } 113 } else while(value && i < max) { 114 buf[i++] = '0' + value % 10; 115 value /= 10; 116 } 117 return i; 118}
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70
| 119
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71int snprintf (char *str, size_t count, const char *fmt, ...); 72int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
| 120/** print long decimal into buffer, returns length */ 121static int 122print_dec_l(char* buf, int max, unsigned long value) 123{ 124 int i = 0; 125 if(value == 0) { 126 if(max > 0) { 127 buf[0] = '0'; 128 i = 1; 129 } 130 } else while(value && i < max) { 131 buf[i++] = '0' + value % 10; 132 value /= 10; 133 } 134 return i; 135}
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73
| 136
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74static void dopr (char *buffer, size_t maxlen, const char *format, 75 va_list args); 76static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, 77 char *value, int flags, int min, int max); 78static void fmtint (char *buffer, size_t *currlen, size_t maxlen, 79 long value, int base, int min, int max, int flags); 80static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, 81 long double fvalue, int min, int max, int flags, int conv); 82static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );
| 137/** print long decimal into buffer, returns length */ 138static int 139print_dec_ll(char* buf, int max, unsigned long long value) 140{ 141 int i = 0; 142 if(value == 0) { 143 if(max > 0) { 144 buf[0] = '0'; 145 i = 1; 146 } 147 } else while(value && i < max) { 148 buf[i++] = '0' + value % 10; 149 value /= 10; 150 } 151 return i; 152}
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83
| 153
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84int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
| 154/** print hex into buffer, returns length */ 155static int 156print_hex(char* buf, int max, unsigned int value)
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85{
| 157{
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86 str[0] = 0; 87 dopr(str, count, fmt, args); 88 return(strlen(str));
| 158 const char* h = "0123456789abcdef"; 159 int i = 0; 160 if(value == 0) { 161 if(max > 0) { 162 buf[0] = '0'; 163 i = 1; 164 } 165 } else while(value && i < max) { 166 buf[i++] = h[value & 0x0f]; 167 value >>= 4; 168 } 169 return i;
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89} 90
| 170} 171
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91/* VARARGS3 */ 92#ifdef HAVE_STDARGS 93int snprintf (char *str,size_t count,const char *fmt,...) 94#else 95int snprintf (va_alist) va_dcl 96#endif
| 172/** print long hex into buffer, returns length */ 173static int 174print_hex_l(char* buf, int max, unsigned long value)
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97{
| 175{
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98#ifndef HAVE_STDARGS 99 char *str; 100 size_t count; 101 char *fmt; 102#endif 103 VA_LOCAL_DECL; 104 105 VA_START (fmt); 106 VA_SHIFT (str, char *); 107 VA_SHIFT (count, size_t ); 108 VA_SHIFT (fmt, char *); 109 (void) vsnprintf(str, count, fmt, ap); 110 VA_END; 111 return(strlen(str));
| 176 const char* h = "0123456789abcdef"; 177 int i = 0; 178 if(value == 0) { 179 if(max > 0) { 180 buf[0] = '0'; 181 i = 1; 182 } 183 } else while(value && i < max) { 184 buf[i++] = h[value & 0x0f]; 185 value >>= 4; 186 } 187 return i;
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112} 113
| 188} 189
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114/* 115 * dopr(): poor man's version of doprintf 116 */
| 190/** print long long hex into buffer, returns length */ 191static int 192print_hex_ll(char* buf, int max, unsigned long long value) 193{ 194 const char* h = "0123456789abcdef"; 195 int i = 0; 196 if(value == 0) { 197 if(max > 0) { 198 buf[0] = '0'; 199 i = 1; 200 } 201 } else while(value && i < max) { 202 buf[i++] = h[value & 0x0f]; 203 value >>= 4; 204 } 205 return i; 206}
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117
| 207
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118/* format read states */ 119#define DP_S_DEFAULT 0 120#define DP_S_FLAGS 1 121#define DP_S_MIN 2 122#define DP_S_DOT 3 123#define DP_S_MAX 4 124#define DP_S_MOD 5 125#define DP_S_CONV 6 126#define DP_S_DONE 7
| 208/** copy string into result, reversed */ 209static void 210spool_str_rev(char** at, size_t* left, int* ret, const char* buf, int len) 211{ 212 int i = len; 213 while(i) { 214 if(*left > 1) { 215 *(*at)++ = buf[--i]; 216 (*left)--; 217 } else --i; 218 (*ret)++; 219 } 220}
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127
| 221
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128/* format flags - Bits */ 129#define DP_F_MINUS 1 130#define DP_F_PLUS 2 131#define DP_F_SPACE 4 132#define DP_F_NUM 8 133#define DP_F_ZERO 16 134#define DP_F_UP 32
| 222/** copy string into result */ 223static void 224spool_str(char** at, size_t* left, int* ret, const char* buf, int len) 225{ 226 int i; 227 for(i=0; i<len; i++) { 228 if(*left > 1) { 229 *(*at)++ = buf[i]; 230 (*left)--; 231 } 232 (*ret)++; 233 } 234}
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135
| 235
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136/* Conversion Flags */ 137#define DP_C_SHORT 1 138#define DP_C_LONG 2 139#define DP_C_LDOUBLE 3
| 236/** print number formatted */ 237static void 238print_num(char** at, size_t* left, int* ret, int minw, int precision, 239 int prgiven, int zeropad, int minus, int plus, int space, 240 int zero, int negative, char* buf, int len) 241{ 242 int w = len; /* excludes minus sign */ 243 char s = get_negsign(negative, plus, space); 244 if(minus) { 245 /* left adjust the number into the field, space padding */ 246 /* calc numw = [sign][zeroes][number] */ 247 int numw = w; 248 if(precision == 0 && zero) numw = 0; 249 if(numw < precision) numw = precision; 250 if(s) numw++;
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140
| 251
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141#define char_to_int(p) (p - '0') 142#ifndef MAX 143#define MAX(p,q) ((p >= q) ? p : q) 144#endif
| 252 /* sign */ 253 if(s) print_pad(at, left, ret, s, 1);
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145
| 254
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146static void dopr (char *buffer, size_t maxlen, const char *format, va_list args) 147{ 148 char ch; 149 long value; 150 long double fvalue; 151 char *strvalue; 152 int min; 153 int max; 154 int state; 155 int flags; 156 int cflags; 157 size_t currlen; 158 159 state = DP_S_DEFAULT; 160 currlen = flags = cflags = min = 0; 161 max = -1; 162 ch = *format++;
| 255 /* number */ 256 if(precision == 0 && zero) { 257 /* "" for the number */ 258 } else { 259 if(w < precision) 260 print_pad(at, left, ret, '0', precision - w); 261 spool_str_rev(at, left, ret, buf, len); 262 } 263 /* spaces */ 264 if(numw < minw) 265 print_pad(at, left, ret, ' ', minw - numw); 266 } else { 267 /* pad on the left of the number */ 268 /* calculate numw has width of [sign][zeroes][number] */ 269 int numw = w; 270 if(precision == 0 && zero) numw = 0; 271 if(numw < precision) numw = precision; 272 if(!prgiven && zeropad && numw < minw) numw = minw; 273 else if(s) numw++;
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163
| 274
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164 while (state != DP_S_DONE) 165 { 166 if ((ch == '\0') || (currlen >= maxlen)) 167 state = DP_S_DONE;
| 275 /* pad with spaces */ 276 if(numw < minw) 277 print_pad(at, left, ret, ' ', minw - numw); 278 /* print sign (and one less zeropad if so) */ 279 if(s) { 280 print_pad(at, left, ret, s, 1); 281 numw--; 282 } 283 /* pad with zeroes */ 284 if(w < numw) 285 print_pad(at, left, ret, '0', numw - w); 286 if(precision == 0 && zero) 287 return; 288 /* print the characters for the value */ 289 spool_str_rev(at, left, ret, buf, len); 290 } 291}
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168
| 292
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169 switch(state) 170 { 171 case DP_S_DEFAULT: 172 if (ch == '%') 173 state = DP_S_FLAGS; 174 else 175 dopr_outch (buffer, &currlen, maxlen, ch); 176 ch = *format++; 177 break; 178 case DP_S_FLAGS: 179 switch (ch) 180 { 181 case '-': 182 flags |= DP_F_MINUS; 183 ch = *format++; 184 break; 185 case '+': 186 flags |= DP_F_PLUS; 187 ch = *format++; 188 break; 189 case ' ': 190 flags |= DP_F_SPACE; 191 ch = *format++; 192 break; 193 case '#': 194 flags |= DP_F_NUM; 195 ch = *format++; 196 break; 197 case '0': 198 flags |= DP_F_ZERO; 199 ch = *format++; 200 break; 201 default: 202 state = DP_S_MIN; 203 break; 204 } 205 break; 206 case DP_S_MIN: 207 if (isdigit(ch)) 208 { 209 min = 10*min + char_to_int (ch); 210 ch = *format++; 211 } 212 else if (ch == '*') 213 { 214 min = va_arg (args, int); 215 ch = *format++; 216 state = DP_S_DOT; 217 } 218 else 219 state = DP_S_DOT; 220 break; 221 case DP_S_DOT: 222 if (ch == '.') 223 { 224 state = DP_S_MAX; 225 ch = *format++; 226 } 227 else 228 state = DP_S_MOD; 229 break; 230 case DP_S_MAX: 231 if (isdigit(ch)) 232 { 233 if (max < 0) 234 max = 0; 235 max = 10*max + char_to_int (ch); 236 ch = *format++; 237 } 238 else if (ch == '*') 239 { 240 max = va_arg (args, int); 241 ch = *format++; 242 state = DP_S_MOD; 243 } 244 else 245 state = DP_S_MOD; 246 break; 247 case DP_S_MOD: 248 /* Currently, we don't support Long Long, bummer */ 249 switch (ch) 250 { 251 case 'h': 252 cflags = DP_C_SHORT; 253 ch = *format++; 254 break; 255 case 'l': 256 cflags = DP_C_LONG; 257 ch = *format++; 258 break; 259 case 'L': 260 cflags = DP_C_LDOUBLE; 261 ch = *format++; 262 break; 263 default: 264 break; 265 } 266 state = DP_S_CONV; 267 break; 268 case DP_S_CONV: 269 switch (ch) 270 { 271 case 'd': 272 case 'i': 273 if (cflags == DP_C_SHORT) 274 value = va_arg (args, int); 275 else if (cflags == DP_C_LONG) 276 value = va_arg (args, long int); 277 else 278 value = va_arg (args, int); 279 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 280 break; 281 case 'o': 282 flags &= ~DP_F_PLUS; 283 if (cflags == DP_C_SHORT) 284 value = va_arg (args, unsigned int); 285 else if (cflags == DP_C_LONG) 286 value = va_arg (args, unsigned long int); 287 else 288 value = va_arg (args, unsigned int); 289 fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); 290 break; 291 case 'u': 292 flags &= ~DP_F_PLUS; 293 if (cflags == DP_C_SHORT) 294 value = va_arg (args, unsigned int); 295 else if (cflags == DP_C_LONG) 296 value = va_arg (args, unsigned long int); 297 else 298 value = va_arg (args, unsigned int); 299 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 300 break; 301 case 'X': 302 flags |= DP_F_UP; 303 case 'x': 304 flags &= ~DP_F_PLUS; 305 if (cflags == DP_C_SHORT) 306 value = va_arg (args, unsigned int); 307 else if (cflags == DP_C_LONG) 308 value = va_arg (args, unsigned long int); 309 else 310 value = va_arg (args, unsigned int); 311 fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); 312 break; 313 case 'f': 314 if (cflags == DP_C_LDOUBLE) 315 fvalue = va_arg (args, long double); 316 else 317 fvalue = va_arg (args, double); 318 /* um, floating point? */ 319 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags, 'f'); 320 break; 321 case 'E': 322 flags |= DP_F_UP; 323 case 'e': 324 if (cflags == DP_C_LDOUBLE) 325 fvalue = va_arg (args, long double); 326 else 327 fvalue = va_arg (args, double); 328 break; 329 case 'G': 330 flags |= DP_F_UP; 331 case 'g': 332 if (cflags == DP_C_LDOUBLE) 333 fvalue = va_arg (args, long double); 334 else 335 fvalue = va_arg (args, double); 336 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags, 'g'); 337 break; 338 case 'c': 339 dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); 340 break; 341 case 's': 342 strvalue = va_arg (args, char *); 343 if (max < 0) 344 max = maxlen; /* ie, no max */ 345 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); 346 break; 347 case 'p': 348 strvalue = va_arg (args, void *); 349 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); 350 break; 351 case 'n': 352 if (cflags == DP_C_SHORT) 353 { 354 short int *num; 355 num = va_arg (args, short int *); 356 *num = currlen; 357 } 358 else if (cflags == DP_C_LONG) 359 { 360 long int *num; 361 num = va_arg (args, long int *); 362 *num = currlen; 363 } 364 else 365 { 366 int *num; 367 num = va_arg (args, int *); 368 *num = currlen; 369 } 370 break; 371 case '%': 372 dopr_outch (buffer, &currlen, maxlen, ch); 373 break; 374 case 'w': 375 /* not supported yet, treat as next char */ 376 ch = *format++; 377 break; 378 default: 379 /* Unknown, skip */ 380 break; 381 } 382 ch = *format++; 383 state = DP_S_DEFAULT; 384 flags = cflags = min = 0; 385 max = -1; 386 break; 387 case DP_S_DONE: 388 break; 389 default: 390 /* hmm? */ 391 break; /* some picky compilers need this */ 392 } 393 } 394 if (currlen < maxlen - 1) 395 buffer[currlen] = '\0'; 396 else 397 buffer[maxlen - 1] = '\0';
| 293/** print %d and %i */ 294static void 295print_num_d(char** at, size_t* left, int* ret, int value, 296 int minw, int precision, int prgiven, int zeropad, int minus, 297 int plus, int space) 298{ 299 char buf[PRINT_DEC_BUFSZ]; 300 int negative = (value < 0); 301 int zero = (value == 0); 302 int len = print_dec(buf, (int)sizeof(buf), 303 (unsigned int)(negative?-value:value)); 304 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 305 plus, space, zero, negative, buf, len);
|
398} 399
| 306} 307
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400static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, 401 char *value, int flags, int min, int max)
| 308/** print %ld and %li */ 309static void 310print_num_ld(char** at, size_t* left, int* ret, long value, 311 int minw, int precision, int prgiven, int zeropad, int minus, 312 int plus, int space)
|
402{
| 313{
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403 int padlen, strln; /* amount to pad */ 404 int cnt = 0; 405 406 if (value == 0) 407 { 408 value = "<NULL>"; 409 }
| 314 char buf[PRINT_DEC_BUFSZ]; 315 int negative = (value < 0); 316 int zero = (value == 0); 317 int len = print_dec_l(buf, (int)sizeof(buf), 318 (unsigned long)(negative?-value:value)); 319 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 320 plus, space, zero, negative, buf, len); 321}
|
410
| 322
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411 for (strln = 0; value[strln]; ++strln); /* strlen */ 412 padlen = min - strln; 413 if (padlen < 0) 414 padlen = 0; 415 if (flags & DP_F_MINUS) 416 padlen = -padlen; /* Left Justify */
| 323/** print %lld and %lli */ 324static void 325print_num_lld(char** at, size_t* left, int* ret, long long value, 326 int minw, int precision, int prgiven, int zeropad, int minus, 327 int plus, int space) 328{ 329 char buf[PRINT_DEC_BUFSZ]; 330 int negative = (value < 0); 331 int zero = (value == 0); 332 int len = print_dec_ll(buf, (int)sizeof(buf), 333 (unsigned long long)(negative?-value:value)); 334 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 335 plus, space, zero, negative, buf, len); 336}
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417
| 337
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418 while ((padlen > 0) && (cnt < max)) 419 { 420 dopr_outch (buffer, currlen, maxlen, ' '); 421 --padlen; 422 ++cnt; 423 } 424 while (*value && (cnt < max)) 425 { 426 dopr_outch (buffer, currlen, maxlen, *value++); 427 ++cnt; 428 } 429 while ((padlen < 0) && (cnt < max)) 430 { 431 dopr_outch (buffer, currlen, maxlen, ' '); 432 ++padlen; 433 ++cnt; 434 }
| 338/** print %u */ 339static void 340print_num_u(char** at, size_t* left, int* ret, unsigned int value, 341 int minw, int precision, int prgiven, int zeropad, int minus, 342 int plus, int space) 343{ 344 char buf[PRINT_DEC_BUFSZ]; 345 int negative = 0; 346 int zero = (value == 0); 347 int len = print_dec(buf, (int)sizeof(buf), value); 348 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 349 plus, space, zero, negative, buf, len);
|
435} 436
| 350} 351
|
437/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
| 352/** print %lu */ 353static void 354print_num_lu(char** at, size_t* left, int* ret, unsigned long value, 355 int minw, int precision, int prgiven, int zeropad, int minus, 356 int plus, int space) 357{ 358 char buf[PRINT_DEC_BUFSZ]; 359 int negative = 0; 360 int zero = (value == 0); 361 int len = print_dec_l(buf, (int)sizeof(buf), value); 362 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 363 plus, space, zero, negative, buf, len); 364}
|
438
| 365
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439static void fmtint (char *buffer, size_t *currlen, size_t maxlen, 440 long value, int base, int min, int max, int flags)
| 366/** print %llu */ 367static void 368print_num_llu(char** at, size_t* left, int* ret, unsigned long long value, 369 int minw, int precision, int prgiven, int zeropad, int minus, 370 int plus, int space)
|
441{
| 371{
|
442 int signvalue = 0; 443 unsigned long uvalue; 444 char convert[20]; 445 int place = 0; 446 int spadlen = 0; /* amount to space pad */ 447 int zpadlen = 0; /* amount to zero pad */ 448 int caps = 0; 449 450 if (max < 0) 451 max = 0;
| 372 char buf[PRINT_DEC_BUFSZ]; 373 int negative = 0; 374 int zero = (value == 0); 375 int len = print_dec_ll(buf, (int)sizeof(buf), value); 376 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 377 plus, space, zero, negative, buf, len); 378}
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452
| 379
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453 uvalue = value; 454 if( value < 0 ) { 455 signvalue = '-'; 456 uvalue = -value; 457 } 458 else 459 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 460 signvalue = '+'; 461 else 462 if (flags & DP_F_SPACE) 463 signvalue = ' ';
| 380/** print %x */ 381static void 382print_num_x(char** at, size_t* left, int* ret, unsigned int value, 383 int minw, int precision, int prgiven, int zeropad, int minus, 384 int plus, int space) 385{ 386 char buf[PRINT_DEC_BUFSZ]; 387 int negative = 0; 388 int zero = (value == 0); 389 int len = print_hex(buf, (int)sizeof(buf), value); 390 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 391 plus, space, zero, negative, buf, len); 392}
|
464
| 393
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465 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
| 394/** print %lx */ 395static void 396print_num_lx(char** at, size_t* left, int* ret, unsigned long value, 397 int minw, int precision, int prgiven, int zeropad, int minus, 398 int plus, int space) 399{ 400 char buf[PRINT_DEC_BUFSZ]; 401 int negative = 0; 402 int zero = (value == 0); 403 int len = print_hex_l(buf, (int)sizeof(buf), value); 404 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 405 plus, space, zero, negative, buf, len); 406}
|
466
| 407
|
467 do { 468 convert[place++] = 469 (caps? "0123456789ABCDEF":"0123456789abcdef") 470 [uvalue % (unsigned)base ]; 471 uvalue = (uvalue / (unsigned)base ); 472 } while(uvalue && (place < 20)); 473 if (place == 20) place--; 474 convert[place] = 0;
| 408/** print %llx */ 409static void 410print_num_llx(char** at, size_t* left, int* ret, unsigned long long value, 411 int minw, int precision, int prgiven, int zeropad, int minus, 412 int plus, int space) 413{ 414 char buf[PRINT_DEC_BUFSZ]; 415 int negative = 0; 416 int zero = (value == 0); 417 int len = print_hex_ll(buf, (int)sizeof(buf), value); 418 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 419 plus, space, zero, negative, buf, len); 420}
|
475
| 421
|
476 zpadlen = max - place; 477 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 478 if (zpadlen < 0) zpadlen = 0; 479 if (spadlen < 0) spadlen = 0; 480 if (flags & DP_F_ZERO) 481 { 482 zpadlen = MAX(zpadlen, spadlen); 483 spadlen = 0; 484 } 485 if (flags & DP_F_MINUS) 486 spadlen = -spadlen; /* Left Justifty */ 487 488#ifdef DEBUG_SNPRINTF 489 dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 490 zpadlen, spadlen, min, max, place));
| 422/** print %llp */ 423static void 424print_num_llp(char** at, size_t* left, int* ret, void* value, 425 int minw, int precision, int prgiven, int zeropad, int minus, 426 int plus, int space) 427{ 428 char buf[PRINT_DEC_BUFSZ]; 429 int negative = 0; 430 int zero = (value == 0); 431#if defined(UINTPTR_MAX) && defined(UINT32_MAX) && (UINTPTR_MAX == UINT32_MAX) 432 /* avoid warning about upcast on 32bit systems */ 433 unsigned long long llvalue = (unsigned long)value; 434#else 435 unsigned long long llvalue = (unsigned long long)value;
|
491#endif
| 436#endif
|
| 437 int len = print_hex_ll(buf, (int)sizeof(buf), llvalue); 438 if(zero) { 439 buf[0]=')'; 440 buf[1]='l'; 441 buf[2]='i'; 442 buf[3]='n'; 443 buf[4]='('; 444 len = 5; 445 } else { 446 /* put '0x' in front of the (reversed) buffer result */ 447 if(len < PRINT_DEC_BUFSZ) 448 buf[len++] = 'x'; 449 if(len < PRINT_DEC_BUFSZ) 450 buf[len++] = '0'; 451 } 452 print_num(at, left, ret, minw, precision, prgiven, zeropad, minus, 453 plus, space, zero, negative, buf, len); 454}
|
492
| 455
|
493 /* Spaces */ 494 while (spadlen > 0) 495 { 496 dopr_outch (buffer, currlen, maxlen, ' '); 497 --spadlen; 498 }
| 456#define PRINT_FLOAT_BUFSZ 64 /* xx.yy with 20.20 about the max */ 457/** spool remainder after the decimal point to buffer, in reverse */ 458static int 459print_remainder(char* buf, int max, double r, int prec) 460{ 461 unsigned long long cap = 1; 462 unsigned long long value; 463 int len, i; 464 if(prec > 19) prec = 19; /* max we can do */ 465 if(max < prec) return 0; 466 for(i=0; i<prec; i++) { 467 cap *= 10; 468 } 469 r *= (double)cap; 470 value = (unsigned long long)r; 471 /* see if we need to round up */ 472 if(((unsigned long long)((r - (double)value)*10.0)) >= 5) { 473 value++; 474 /* that might carry to numbers before the comma, if so, 475 * just ignore that rounding. failure because 64bitprintout */ 476 if(value >= cap) 477 value = cap-1; 478 } 479 len = print_dec_ll(buf, max, value); 480 while(len < prec) { /* pad with zeroes, e.g. if 0.0012 */ 481 buf[len++] = '0'; 482 } 483 if(len < max) 484 buf[len++] = '.'; 485 return len; 486}
|
499
| 487
|
500 /* Sign */ 501 if (signvalue) 502 dopr_outch (buffer, currlen, maxlen, signvalue);
| 488/** spool floating point to buffer */ 489static int 490print_float(char* buf, int max, double value, int prec) 491{ 492 /* as xxx.xxx if prec==0, no '.', with prec decimals after . */ 493 /* no conversion for NAN and INF, because we do not want to require 494 linking with -lm. */ 495 /* Thus, the conversions use 64bit integers to convert the numbers, 496 * which makes 19 digits before and after the decimal point the max */ 497 unsigned long long whole = (unsigned long long)value; 498 double remain = value - (double)whole; 499 int len = 0; 500 if(prec != 0) 501 len = print_remainder(buf, max, remain, prec); 502 len += print_dec_ll(buf+len, max-len, whole); 503 return len; 504}
|
503
| 505
|
504 /* Zeros */ 505 if (zpadlen > 0) 506 { 507 while (zpadlen > 0) 508 { 509 dopr_outch (buffer, currlen, maxlen, '0'); 510 --zpadlen; 511 } 512 } 513 514 /* Digits */ 515 while (place > 0) 516 dopr_outch (buffer, currlen, maxlen, convert[--place]); 517 518 /* Left Justified spaces */ 519 while (spadlen < 0) { 520 dopr_outch (buffer, currlen, maxlen, ' '); 521 ++spadlen; 522 }
| 506/** print %f */ 507static void 508print_num_f(char** at, size_t* left, int* ret, double value, 509 int minw, int precision, int prgiven, int zeropad, int minus, 510 int plus, int space) 511{ 512 char buf[PRINT_FLOAT_BUFSZ]; 513 int negative = (value < 0); 514 int zero = 0; 515 int len; 516 if(!prgiven) precision = 6; 517 len = print_float(buf, (int)sizeof(buf), negative?-value:value, 518 precision); 519 print_num(at, left, ret, minw, 1, 0, zeropad, minus, 520 plus, space, zero, negative, buf, len);
|
523} 524
| 521} 522
|
525static long double abs_val (long double value)
| 523/* rudimentary %g support */ 524static int 525print_float_g(char* buf, int max, double value, int prec)
|
526{
| 526{
|
527 long double result = value;
| 527 unsigned long long whole = (unsigned long long)value; 528 double remain = value - (double)whole; 529 int before = 0; 530 int len = 0;
|
528
| 531
|
529 if (value < 0) 530 result = -value;
| 532 /* number of digits before the decimal point */ 533 while(whole > 0) { 534 before++; 535 whole /= 10; 536 } 537 whole = (unsigned long long)value;
|
531
| 538
|
532 return result;
| 539 if(prec > before && remain != 0.0) { 540 /* see if the last decimals are zero, if so, skip them */ 541 len = print_remainder(buf, max, remain, prec-before); 542 while(len > 0 && buf[0]=='0') { 543 memmove(buf, buf+1, --len); 544 } 545 } 546 len += print_dec_ll(buf+len, max-len, whole); 547 return len;
|
533} 534
| 548} 549
|
535static long double compat_pow10 (int exp)
| 550 551/** print %g */ 552static void 553print_num_g(char** at, size_t* left, int* ret, double value, 554 int minw, int precision, int prgiven, int zeropad, int minus, 555 int plus, int space)
|
536{
| 556{
|
537 long double result = 1;
| 557 char buf[PRINT_FLOAT_BUFSZ]; 558 int negative = (value < 0); 559 int zero = 0; 560 int len; 561 if(!prgiven) precision = 6; 562 if(precision == 0) precision = 1; 563 len = print_float_g(buf, (int)sizeof(buf), negative?-value:value, 564 precision); 565 print_num(at, left, ret, minw, 1, 0, zeropad, minus, 566 plus, space, zero, negative, buf, len); 567}
|
538
| 568
|
539 while (exp) 540 { 541 result *= 10; 542 exp--; 543 } 544 545 return result;
| 569 570/** strnlen (compat implementation) */ 571static int 572my_strnlen(const char* s, int max) 573{ 574 int i; 575 for(i=0; i<max; i++) 576 if(s[i]==0) 577 return i; 578 return max;
|
546} 547
| 579} 580
|
548static long compat_round (long double value)
| 581/** print %s */ 582static void 583print_str(char** at, size_t* left, int* ret, char* s, 584 int minw, int precision, int prgiven, int minus)
|
549{
| 585{
|
550 long intpart;
| 586 int w; 587 /* with prec: no more than x characters from this string, stop at 0 */ 588 if(prgiven) 589 w = my_strnlen(s, precision); 590 else w = (int)strlen(s); /* up to the nul */ 591 if(w < minw && !minus) 592 print_pad(at, left, ret, ' ', minw - w); 593 spool_str(at, left, ret, s, w); 594 if(w < minw && minus) 595 print_pad(at, left, ret, ' ', minw - w); 596}
|
551
| 597
|
552 intpart = value; 553 value = value - intpart; 554 if (value >= 0.5) 555 intpart++; 556 557 return intpart;
| 598/** print %c */ 599static void 600print_char(char** at, size_t* left, int* ret, int c, 601 int minw, int minus) 602{ 603 if(1 < minw && !minus) 604 print_pad(at, left, ret, ' ', minw - 1); 605 print_pad(at, left, ret, c, 1); 606 if(1 < minw && minus) 607 print_pad(at, left, ret, ' ', minw - 1);
|
558} 559
| 608} 609
|
560static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, 561 long double fvalue, int min, int max, int flags, int conv)
| 610 611/** 612 * Print to string. 613 * str: string buffer for result. result will be null terminated. 614 * size: size of the buffer. null is put inside buffer. 615 * format: printf format string. 616 * arg: '...' arguments to print. 617 * returns number of characters. a null is printed after this. 618 * return number of bytes that would have been written 619 * if the buffer had been large enough. 620 * 621 * supported format specifiers: 622 * %s, %u, %d, %x, %i, %f, %g, %c, %p, %n. 623 * length: l, ll (for d, u, x). 624 * precision: 6.6d (for d, u, x) 625 * %f, %g precisions, 0.3f 626 * %20s, '.*s' 627 * and %%. 628 */ 629int vsnprintf(char* str, size_t size, const char* format, va_list arg)
|
562{
| 630{
|
563 int signvalue = 0; 564 long double ufvalue; 565 char iconvert[20]; 566 char fconvert[20]; 567 int iplace = 0; 568 int fplace = 0; 569 int padlen = 0; /* amount to pad */ 570 int zpadlen = 0; 571 int caps = 0; 572 long intpart; 573 long fracpart; 574 575 /* 576 * AIX manpage says the default is 0, but Solaris says the default 577 * is 6, and sprintf on AIX defaults to 6 578 */ 579 if (max < 0) 580 max = 6;
| 631 char* at = str; 632 size_t left = size; 633 int ret = 0; 634 const char* fmt = format; 635 int conv, minw, precision, prgiven, zeropad, minus, plus, space, length; 636 while(*fmt) { 637 /* copy string before % */ 638 while(*fmt && *fmt!='%') { 639 if(left > 1) { 640 *at++ = *fmt++; 641 left--; 642 } else fmt++; 643 ret++; 644 } 645 646 /* see if we are at end */ 647 if(!*fmt) break;
|
581
| 648
|
582 ufvalue = abs_val (fvalue);
| 649 /* fetch next argument % designation from format string */ 650 fmt++; /* skip the '%' */
|
583
| 651
|
584 if (fvalue < 0) 585 signvalue = '-'; 586 else 587 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 588 signvalue = '+'; 589 else 590 if (flags & DP_F_SPACE) 591 signvalue = ' ';
| 652 /********************************/ 653 /* get the argument designation */ 654 /********************************/ 655 /* we must do this vararg stuff inside this function for 656 * portability. Hence, get_designation, and print_designation 657 * are not their own functions. */
|
592
| 658
|
593#if 0 594 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 595#endif
| 659 /* printout designation: 660 * conversion specifier: x, d, u, s, c, n, m, p 661 * flags: # not supported 662 * 0 zeropad (on the left) 663 * - left adjust (right by default) 664 * ' ' printspace for positive number (in - position). 665 * + alwayssign 666 * fieldwidth: [1-9][0-9]* minimum field width. 667 * if this is * then type int next argument specifies the minwidth. 668 * if this is negative, the - flag is set (with positive width). 669 * precision: period[digits]*, %.2x. 670 * if this is * then type int next argument specifies the precision. 671 * just '.' or negative value means precision=0. 672 * this is mindigits to print for d, i, u, x 673 * this is aftercomma digits for f 674 * this is max number significant digits for g 675 * maxnumber characters to be printed for s 676 * length: 0-none (int), 1-l (long), 2-ll (long long) 677 * notsupported: hh (char), h (short), L (long double), q, j, z, t 678 * Does not support %m$ and *m$ argument designation as array indices. 679 * Does not support %#x 680 * 681 */ 682 minw = 0; 683 precision = 1; 684 prgiven = 0; 685 zeropad = 0; 686 minus = 0; 687 plus = 0; 688 space = 0; 689 length = 0;
|
596
| 690
|
597 intpart = ufvalue;
| 691 /* get flags in any order */ 692 for(;;) { 693 if(*fmt == '0') 694 zeropad = 1; 695 else if(*fmt == '-') 696 minus = 1; 697 else if(*fmt == '+') 698 plus = 1; 699 else if(*fmt == ' ') 700 space = 1; 701 else break; 702 fmt++; 703 }
|
598
| 704
|
599 /* 600 * Sorry, we only support 9 digits past the decimal because of our 601 * conversion method 602 */ 603 if (max > 9) 604 max = 9;
| 705 /* field width */ 706 if(*fmt == '*') { 707 fmt++; /* skip char */ 708 minw = va_arg(arg, int); 709 if(minw < 0) { 710 minus = 1; 711 minw = -minw; 712 } 713 } else while(*fmt >= '0' && *fmt <= '9') { 714 minw = minw*10 + (*fmt++)-'0'; 715 }
|
605
| 716
|
606 /* We "cheat" by converting the fractional part to integer by 607 * multiplying by a factor of 10 608 */ 609 fracpart = compat_round ((compat_pow10 (max)) * (ufvalue - intpart));
| 717 /* precision */ 718 if(*fmt == '.') { 719 fmt++; /* skip period */ 720 prgiven = 1; 721 precision = 0; 722 if(*fmt == '*') { 723 fmt++; /* skip char */ 724 precision = va_arg(arg, int); 725 if(precision < 0) 726 precision = 0; 727 } else while(*fmt >= '0' && *fmt <= '9') { 728 precision = precision*10 + (*fmt++)-'0'; 729 } 730 }
|
610
| 731
|
611 if (fracpart >= compat_pow10 (max)) 612 { 613 intpart++; 614 fracpart -= compat_pow10 (max); 615 }
| 732 /* length */ 733 if(*fmt == 'l') { 734 fmt++; /* skip char */ 735 length = 1; 736 if(*fmt == 'l') { 737 fmt++; /* skip char */ 738 length = 2; 739 } 740 }
|
616
| 741
|
617#ifdef DEBUG_SNPRINTF 618 dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart)); 619#endif
| 742 /* get the conversion */ 743 if(!*fmt) conv = 0; 744 else conv = *fmt++;
|
620
| 745
|
621 /* Convert integer part */ 622 do { 623 iconvert[iplace++] = 624 (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; 625 intpart = (intpart / 10); 626 } while(intpart && (iplace < 20)); 627 if (iplace == 20) iplace--; 628 iconvert[iplace] = 0;
| 746 /***********************************/ 747 /* print that argument designation */ 748 /***********************************/ 749 switch(conv) { 750 case 'i': 751 case 'd': 752 if(length == 0) 753 print_num_d(&at, &left, &ret, va_arg(arg, int), 754 minw, precision, prgiven, zeropad, minus, plus, space); 755 else if(length == 1) 756 print_num_ld(&at, &left, &ret, va_arg(arg, long), 757 minw, precision, prgiven, zeropad, minus, plus, space); 758 else if(length == 2) 759 print_num_lld(&at, &left, &ret, 760 va_arg(arg, long long), 761 minw, precision, prgiven, zeropad, minus, plus, space); 762 break; 763 case 'u': 764 if(length == 0) 765 print_num_u(&at, &left, &ret, 766 va_arg(arg, unsigned int), 767 minw, precision, prgiven, zeropad, minus, plus, space); 768 else if(length == 1) 769 print_num_lu(&at, &left, &ret, 770 va_arg(arg, unsigned long), 771 minw, precision, prgiven, zeropad, minus, plus, space); 772 else if(length == 2) 773 print_num_llu(&at, &left, &ret, 774 va_arg(arg, unsigned long long), 775 minw, precision, prgiven, zeropad, minus, plus, space); 776 break; 777 case 'x': 778 if(length == 0) 779 print_num_x(&at, &left, &ret, 780 va_arg(arg, unsigned int), 781 minw, precision, prgiven, zeropad, minus, plus, space); 782 else if(length == 1) 783 print_num_lx(&at, &left, &ret, 784 va_arg(arg, unsigned long), 785 minw, precision, prgiven, zeropad, minus, plus, space); 786 else if(length == 2) 787 print_num_llx(&at, &left, &ret, 788 va_arg(arg, unsigned long long), 789 minw, precision, prgiven, zeropad, minus, plus, space); 790 break; 791 case 's': 792 print_str(&at, &left, &ret, va_arg(arg, char*), 793 minw, precision, prgiven, minus); 794 break; 795 case 'c': 796 print_char(&at, &left, &ret, va_arg(arg, int), 797 minw, minus); 798 break; 799 case 'n': 800 *va_arg(arg, int*) = ret; 801 break; 802 case 'm': 803 print_str(&at, &left, &ret, strerror(errno), 804 minw, precision, prgiven, minus); 805 break; 806 case 'p': 807 print_num_llp(&at, &left, &ret, va_arg(arg, void*), 808 minw, precision, prgiven, zeropad, minus, plus, space); 809 break; 810 case '%': 811 print_pad(&at, &left, &ret, '%', 1); 812 break; 813 case 'f': 814 print_num_f(&at, &left, &ret, va_arg(arg, double), 815 minw, precision, prgiven, zeropad, minus, plus, space); 816 break; 817 case 'g': 818 print_num_g(&at, &left, &ret, va_arg(arg, double), 819 minw, precision, prgiven, zeropad, minus, plus, space); 820 break; 821 /* unknown */ 822 default: 823 case 0: break; 824 } 825 }
|
629
| 826
|
630 /* Convert fractional part */ 631 do { 632 fconvert[fplace++] = 633 (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; 634 fracpart = (fracpart / 10); 635 if(conv == 'g' && fplace == 1 && fconvert[0] == '0') { 636 fplace = 0; /* skip trailing zeroes for %g */ 637 zpadlen ++; 638 } 639 } while(fracpart && (fplace < 20)); 640 if (fplace == 20) fplace--; 641 fconvert[fplace] = 0;
| 827 /* zero terminate */ 828 if(left > 0) 829 *at = 0; 830 return ret; 831}
|
642
| 832
|
643 if(conv == 'f') { 644 /* -1 for decimal point, another -1 if we are printing a sign */ 645 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 646 zpadlen = max - fplace; 647 } else if(conv == 'g') { 648 /* zpadlen contains number of trailing zeroes removed */ 649 padlen = min - iplace - (max-zpadlen) - 1 - ((signvalue) ? 1 : 0); 650 if(fplace == 0) { 651 padlen += 1; /* add the decimal dot suppressed */ 652 zpadlen = 0; 653 } else zpadlen = (max-zpadlen) - fplace; 654 } 655 if (zpadlen < 0) 656 zpadlen = 0; 657 if (padlen < 0) 658 padlen = 0; 659 if (flags & DP_F_MINUS) 660 padlen = -padlen; /* Left Justifty */
| 833#ifdef SNPRINTF_TEST
|
661
| 834
|
662 if ((flags & DP_F_ZERO) && (padlen > 0)) 663 { 664 if (signvalue) 665 { 666 dopr_outch (buffer, currlen, maxlen, signvalue); 667 --padlen; 668 signvalue = 0; 669 } 670 while (padlen > 0) 671 { 672 dopr_outch (buffer, currlen, maxlen, '0'); 673 --padlen; 674 } 675 } 676 while (padlen > 0) 677 { 678 dopr_outch (buffer, currlen, maxlen, ' '); 679 --padlen; 680 } 681 if (signvalue) 682 dopr_outch (buffer, currlen, maxlen, signvalue);
| 835/** do tests */ 836#undef snprintf 837#define DOTEST(bufsz, result, retval, ...) do { \ 838 char buf[bufsz]; \ 839 printf("now test %s\n", #__VA_ARGS__); \ 840 int r=my_snprintf(buf, sizeof(buf), __VA_ARGS__); \ 841 if(r != retval || strcmp(buf, result) != 0) { \ 842 printf("error test(%s) was \"%s\":%d\n", \ 843 ""#bufsz", "#result", "#retval", "#__VA_ARGS__, \ 844 buf, r); \ 845 exit(1); \ 846 } \ 847 r=snprintf(buf, sizeof(buf), __VA_ARGS__); \ 848 if(r != retval || strcmp(buf, result) != 0) { \ 849 printf("error test(%s) differs with system, \"%s\":%d\n", \ 850 ""#bufsz", "#result", "#retval", "#__VA_ARGS__, \ 851 buf, r); \ 852 exit(1); \ 853 } \ 854 printf("test(\"%s\":%d) passed\n", buf, r); \ 855 } while(0);
|
683
| 856
|
684 while (iplace > 0) 685 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
| 857/** test program */ 858int main(void) 859{ 860 int x = 0;
|
686
| 861
|
687 /* for %g do not output decimal point if no fraction is present */ 688 if(conv == 'f' || (conv == 'g' && fplace > 0)) { 689 /* 690 * Decimal point. This should probably use locale to find the correct 691 * char to print out. 692 */ 693 dopr_outch (buffer, currlen, maxlen, '.'); 694 }
| 862 /* bufsize, expectedstring, expectedretval, snprintf arguments */ 863 DOTEST(1024, "hello", 5, "hello"); 864 DOTEST(1024, "h", 1, "h"); 865 /* warning from gcc for format string, but it does work 866 * DOTEST(1024, "", 0, ""); */
|
695
| 867
|
696 while (zpadlen > 0) 697 { 698 dopr_outch (buffer, currlen, maxlen, '0'); 699 --zpadlen; 700 }
| 868 DOTEST(3, "he", 5, "hello"); 869 DOTEST(1, "", 7, "%d", 7823089);
|
701
| 870
|
702 while (fplace > 0) 703 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
| 871 /* test positive numbers */ 872 DOTEST(1024, "0", 1, "%d", 0); 873 DOTEST(1024, "1", 1, "%d", 1); 874 DOTEST(1024, "9", 1, "%d", 9); 875 DOTEST(1024, "15", 2, "%d", 15); 876 DOTEST(1024, "ab15cd", 6, "ab%dcd", 15); 877 DOTEST(1024, "167", 3, "%d", 167); 878 DOTEST(1024, "7823089", 7, "%d", 7823089); 879 DOTEST(1024, " 12", 3, "%3d", 12); 880 DOTEST(1024, "012", 3, "%.3d", 12); 881 DOTEST(1024, "012", 3, "%3.3d", 12); 882 DOTEST(1024, "012", 3, "%03d", 12); 883 DOTEST(1024, " 012", 4, "%4.3d", 12); 884 DOTEST(1024, "", 0, "%.0d", 0);
|
704
| 885
|
705 while (padlen < 0) 706 { 707 dopr_outch (buffer, currlen, maxlen, ' '); 708 ++padlen; 709 } 710}
| 886 /* test negative numbers */ 887 DOTEST(1024, "-1", 2, "%d", -1); 888 DOTEST(1024, "-12", 3, "%3d", -12); 889 DOTEST(1024, " -2", 3, "%3d", -2); 890 DOTEST(1024, "-012", 4, "%.3d", -12); 891 DOTEST(1024, "-012", 4, "%3.3d", -12); 892 DOTEST(1024, "-012", 4, "%4.3d", -12); 893 DOTEST(1024, " -012", 5, "%5.3d", -12); 894 DOTEST(1024, "-12", 3, "%03d", -12); 895 DOTEST(1024, "-02", 3, "%03d", -2); 896 DOTEST(1024, "-15", 3, "%d", -15); 897 DOTEST(1024, "-7307", 5, "%d", -7307); 898 DOTEST(1024, "-12 ", 5, "%-5d", -12); 899 DOTEST(1024, "-00012", 6, "%-.5d", -12);
|
711
| 900
|
712static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) 713{ 714 if (*currlen < maxlen) 715 buffer[(*currlen)++] = c; 716}
| 901 /* test + and space flags */ 902 DOTEST(1024, "+12", 3, "%+d", 12); 903 DOTEST(1024, " 12", 3, "% d", 12);
|
717
| 904
|
718#ifdef TEST_SNPRINTF 719#ifndef LONG_STRING 720#define LONG_STRING 1024 721#endif 722int main (void) 723{ 724 char buf1[LONG_STRING]; 725 char buf2[LONG_STRING]; 726 char *fp_fmt[] = { 727 "%-1.5f", 728 "%1.5f", 729 "%123.9f", 730 "%10.5f", 731 "% 10.5f", 732 "%+22.9f", 733 "%+4.9f", 734 "%01.3f", 735 "%4f", 736 "%3.1f", 737 "%3.2f", 738 NULL 739 }; 740 double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, 741 0.9996, 1.996, 4.136, 0}; 742 char *int_fmt[] = { 743 "%-1.5d", 744 "%1.5d", 745 "%123.9d", 746 "%5.5d", 747 "%10.5d", 748 "% 10.5d", 749 "%+22.33d", 750 "%01.3d", 751 "%4d", 752 NULL 753 }; 754 long int_nums[] = { -1, 134, 91340, 341, 0203, 0}; 755 int x, y; 756 int fail = 0; 757 int num = 0;
| 905 /* test %u */ 906 DOTEST(1024, "12", 2, "%u", 12); 907 DOTEST(1024, "0", 1, "%u", 0); 908 DOTEST(1024, "4294967295", 10, "%u", 0xffffffff);
|
758
| 909
|
759 printf ("Testing snprintf format codes against system sprintf...\n");
| 910 /* test %x */ 911 DOTEST(1024, "0", 1, "%x", 0); 912 DOTEST(1024, "c", 1, "%x", 12); 913 DOTEST(1024, "12ab34cd", 8, "%x", 0x12ab34cd);
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760
| 914
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761 for (x = 0; fp_fmt[x] != NULL ; x++) 762 for (y = 0; fp_nums[y] != 0 ; y++) 763 { 764 snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]); 765 sprintf (buf2, fp_fmt[x], fp_nums[y]); 766 if (strcmp (buf1, buf2)) 767 { 768 printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", 769 fp_fmt[x], buf1, buf2); 770 fail++; 771 } 772 num++; 773 }
| 915 /* test %llu, %lld */ 916 DOTEST(1024, "18446744073709551615", 20, "%llu", 917 (long long)0xffffffffffffffff); 918 DOTEST(1024, "-9223372036854775808", 20, "%lld", 919 (long long)0x8000000000000000); 920 DOTEST(1024, "9223372036854775808", 19, "%llu", 921 (long long)0x8000000000000000);
|
774
| 922
|
775 for (x = 0; int_fmt[x] != NULL ; x++) 776 for (y = 0; int_nums[y] != 0 ; y++) 777 { 778 snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]); 779 sprintf (buf2, int_fmt[x], int_nums[y]); 780 if (strcmp (buf1, buf2)) 781 { 782 printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", 783 int_fmt[x], buf1, buf2); 784 fail++; 785 } 786 num++; 787 } 788 printf ("%d tests failed out of %d.\n", fail, num);
| 923 /* test %s */ 924 DOTEST(1024, "hello", 5, "%s", "hello"); 925 DOTEST(1024, " hello", 10, "%10s", "hello"); 926 DOTEST(1024, "hello ", 10, "%-10s", "hello"); 927 DOTEST(1024, "he", 2, "%.2s", "hello"); 928 DOTEST(1024, " he", 4, "%4.2s", "hello"); 929 DOTEST(1024, " h", 4, "%4.2s", "h"); 930 931 /* test %c */ 932 DOTEST(1024, "a", 1, "%c", 'a'); 933 /* warning from gcc for format string, but it does work 934 DOTEST(1024, " a", 5, "%5c", 'a'); 935 DOTEST(1024, "a", 1, "%.0c", 'a'); */ 936 937 /* test %n */ 938 DOTEST(1024, "hello", 5, "hello%n", &x); 939 if(x != 5) { printf("the %%n failed\n"); exit(1); } 940 941 /* test %m */ 942 errno = 0; 943 DOTEST(1024, "Success", 7, "%m"); 944 945 /* test %p */ 946 DOTEST(1024, "0x10", 4, "%p", (void*)0x10); 947 DOTEST(1024, "(nil)", 5, "%p", (void*)0x0); 948 949 /* test %% */ 950 DOTEST(1024, "%", 1, "%%"); 951 952 /* test %f */ 953 DOTEST(1024, "0.000000", 8, "%f", 0.0); 954 DOTEST(1024, "0.00", 4, "%.2f", 0.0); 955 /* differs, "-0.00" DOTEST(1024, "0.00", 4, "%.2f", -0.0); */ 956 DOTEST(1024, "234.00", 6, "%.2f", 234.005); 957 DOTEST(1024, "8973497.1246", 12, "%.4f", 8973497.12456); 958 DOTEST(1024, "-12.000000", 10, "%f", -12.0); 959 DOTEST(1024, "6", 1, "%.0f", 6.0); 960 961 DOTEST(1024, "6", 1, "%g", 6.0); 962 DOTEST(1024, "6.1", 3, "%g", 6.1); 963 DOTEST(1024, "6.15", 4, "%g", 6.15); 964 965 /* These format strings are from the code of NSD, Unbound, ldns */ 966 967 DOTEST(1024, "abcdef", 6, "%s", "abcdef"); 968 DOTEST(1024, "005", 3, "%03u", 5); 969 DOTEST(1024, "12345", 5, "%03u", 12345); 970 DOTEST(1024, "5", 1, "%d", 5); 971 DOTEST(1024, "(nil)", 5, "%p", NULL); 972 DOTEST(1024, "12345", 5, "%ld", (long)12345); 973 DOTEST(1024, "12345", 5, "%lu", (long)12345); 974 DOTEST(1024, " 12345", 12, "%12u", (unsigned)12345); 975 DOTEST(1024, "12345", 5, "%u", (unsigned)12345); 976 DOTEST(1024, "12345", 5, "%llu", (unsigned long long)12345); 977 DOTEST(1024, "12345", 5, "%x", 0x12345); 978 DOTEST(1024, "12345", 5, "%llx", (long long)0x12345); 979 DOTEST(1024, "012345", 6, "%6.6d", 12345); 980 DOTEST(1024, "012345", 6, "%6.6u", 12345); 981 DOTEST(1024, "1234.54", 7, "%g", 1234.54); 982 DOTEST(1024, "123456789.54", 12, "%.12g", 123456789.54); 983 DOTEST(1024, "3456789123456.54", 16, "%.16g", 3456789123456.54); 984 /* %24g does not work with 24 digits, not enough accuracy, 985 * the first 16 digits are correct */ 986 DOTEST(1024, "12345", 5, "%3.3d", 12345); 987 DOTEST(1024, "000", 3, "%3.3d", 0); 988 DOTEST(1024, "001", 3, "%3.3d", 1); 989 DOTEST(1024, "012", 3, "%3.3d", 12); 990 DOTEST(1024, "-012", 4, "%3.3d", -12); 991 DOTEST(1024, "he", 2, "%.2s", "hello"); 992 DOTEST(1024, "helloworld", 10, "%s%s", "hello", "world"); 993 DOTEST(1024, "he", 2, "%.*s", 2, "hello"); 994 DOTEST(1024, " hello", 7, "%*s", 7, "hello"); 995 DOTEST(1024, "hello ", 7, "%*s", -7, "hello"); 996 DOTEST(1024, "0", 1, "%c", '0'); 997 DOTEST(1024, "A", 1, "%c", 'A'); 998 DOTEST(1024, "", 1, "%c", 0); 999 DOTEST(1024, "\010", 1, "%c", 8); 1000 DOTEST(1024, "%", 1, "%%"); 1001 DOTEST(1024, "0a", 2, "%02x", 0x0a); 1002 DOTEST(1024, "bd", 2, "%02x", 0xbd); 1003 DOTEST(1024, "12", 2, "%02ld", (long)12); 1004 DOTEST(1024, "02", 2, "%02ld", (long)2); 1005 DOTEST(1024, "02", 2, "%02u", (unsigned)2); 1006 DOTEST(1024, "765432", 6, "%05u", (unsigned)765432); 1007 DOTEST(1024, "10.234", 6, "%0.3f", 10.23421); 1008 DOTEST(1024, "123456.234", 10, "%0.3f", 123456.23421); 1009 DOTEST(1024, "123456789.234", 13, "%0.3f", 123456789.23421); 1010 DOTEST(1024, "123456.23", 9, "%.2f", 123456.23421); 1011 DOTEST(1024, "123456", 6, "%.0f", 123456.23421); 1012 DOTEST(1024, "0123", 4, "%.4x", 0x0123); 1013 DOTEST(1024, "00000123", 8, "%.8x", 0x0123); 1014 DOTEST(1024, "ffeb0cde", 8, "%.8x", 0xffeb0cde); 1015 DOTEST(1024, " 987654321", 10, "%10lu", (unsigned long)987654321); 1016 DOTEST(1024, " 987654321", 12, "%12lu", (unsigned long)987654321); 1017 DOTEST(1024, "987654321", 9, "%i", 987654321); 1018 DOTEST(1024, "-87654321", 9, "%i", -87654321); 1019 DOTEST(1024, "hello ", 16, "%-16s", "hello"); 1020 DOTEST(1024, " ", 16, "%-16s", ""); 1021 DOTEST(1024, "a ", 16, "%-16s", "a"); 1022 DOTEST(1024, "foobarfoobar ", 16, "%-16s", "foobarfoobar"); 1023 DOTEST(1024, "foobarfoobarfoobar", 18, "%-16s", "foobarfoobarfoobar"); 1024 1025 /* combined expressions */ 1026 DOTEST(1024, "foo 1.0 size 512 edns", 21, 1027 "foo %s size %d %s%s", "1.0", 512, "", "edns"); 1028 DOTEST(15, "foo 1.0 size 5", 21, 1029 "foo %s size %d %s%s", "1.0", 512, "", "edns"); 1030 DOTEST(1024, "packet 1203ceff id", 18, 1031 "packet %2.2x%2.2x%2.2x%2.2x id", 0x12, 0x03, 0xce, 0xff); 1032 DOTEST(1024, "/tmp/testbound_123abcd.tmp", 26, "/tmp/testbound_%u%s%s.tmp", 123, "ab", "cd"); 1033 1034 return 0;
|
789} 790#endif /* SNPRINTF_TEST */
| 1035} 1036#endif /* SNPRINTF_TEST */
|
791 792#endif /* !HAVE_SNPRINTF */
| |
| |