1 /* 2 * Copyright Patrick Powell 1995 3 * This code is based on code written by Patrick Powell (papowell@astart.com) 4 * It may be used for any purpose as long as this notice remains intact 5 * on all source code distributions 6 */ 7 8 /************************************************************** 9 * Original: 10 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995 11 * A bombproof version of doprnt (dopr) included. 12 * Sigh. This sort of thing is always nasty do deal with. Note that 13 * the version here does not include floating point... 14 * 15 * snprintf() is used instead of sprintf() as it does limit checks 16 * for string length. This covers a nasty loophole. 17 * 18 * The other functions are there to prevent NULL pointers from 19 * causing nast effects. 20 * 21 * More Recently: 22 * Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43 23 * This was ugly. It is still ugly. I opted out of floating point 24 * numbers, but the formatter understands just about everything 25 * from the normal C string format, at least as far as I can tell from 26 * the Solaris 2.5 printf(3S) man page. 27 * 28 * Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1 29 * Ok, added some minimal floating point support, which means this 30 * probably requires libm on most operating systems. Don't yet 31 * support the exponent (e,E) and sigfig (g,G). Also, fmtint() 32 * was pretty badly broken, it just wasn't being exercised in ways 33 * which showed it, so that's been fixed. Also, formated the code 34 * to mutt conventions, and removed dead code left over from the 35 * original. Also, there is now a builtin-test, just compile with: 36 * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm 37 * and run snprintf for results. 38 * 39 * Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i 40 * The PGP code was using unsigned hexadecimal formats. 41 * Unfortunately, unsigned formats simply didn't work. 42 * 43 * Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8 44 * The original code assumed that both snprintf() and vsnprintf() were 45 * missing. Some systems only have snprintf() but not vsnprintf(), so 46 * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF. 47 * 48 * Andrew Tridgell (tridge@samba.org) Oct 1998 49 * fixed handling of %.0f 50 * added test for HAVE_LONG_DOUBLE 51 * 52 * tridge@samba.org, idra@samba.org, April 2001 53 * got rid of fcvt code (twas buggy and made testing harder) 54 * added C99 semantics 55 * 56 * date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0 57 * actually print args for %g and %e 58 * 59 * date: 2002/06/03 13:37:52; author: jmcd; state: Exp; lines: +8 -0 60 * Since includes.h isn't included here, VA_COPY has to be defined here. I don't 61 * see any include file that is guaranteed to be here, so I'm defining it 62 * locally. Fixes AIX and Solaris builds. 63 * 64 * date: 2002/06/03 03:07:24; author: tridge; state: Exp; lines: +5 -13 65 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of 66 * functions 67 * 68 * date: 2002/05/17 14:51:22; author: jmcd; state: Exp; lines: +21 -4 69 * Fix usage of va_list passed as an arg. Use __va_copy before using it 70 * when it exists. 71 * 72 * date: 2002/04/16 22:38:04; author: idra; state: Exp; lines: +20 -14 73 * Fix incorrect zpadlen handling in fmtfp. 74 * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it. 75 * few mods to make it easier to compile the tests. 76 * addedd the "Ollie" test to the floating point ones. 77 * 78 * Martin Pool (mbp@samba.org) April 2003 79 * Remove NO_CONFIG_H so that the test case can be built within a source 80 * tree with less trouble. 81 * Remove unnecessary SAFE_FREE() definition. 82 * 83 * Martin Pool (mbp@samba.org) May 2003 84 * Put in a prototype for dummy_snprintf() to quiet compiler warnings. 85 * 86 * Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even 87 * if the C library has some snprintf functions already. 88 **************************************************************/ 89 90 #include "includes.h" 91 92 RCSID("$Id: bsd-snprintf.c,v 1.11 2005/12/17 11:32:04 dtucker Exp $"); 93 94 #if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */ 95 # undef HAVE_SNPRINTF 96 # undef HAVE_VSNPRINTF 97 #endif 98 99 #ifndef VA_COPY 100 # ifdef HAVE_VA_COPY 101 # define VA_COPY(dest, src) va_copy(dest, src) 102 # else 103 # ifdef HAVE___VA_COPY 104 # define VA_COPY(dest, src) __va_copy(dest, src) 105 # else 106 # define VA_COPY(dest, src) (dest) = (src) 107 # endif 108 # endif 109 #endif 110 111 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) 112 113 #ifdef HAVE_LONG_DOUBLE 114 # define LDOUBLE long double 115 #else 116 # define LDOUBLE double 117 #endif 118 119 #ifdef HAVE_LONG_LONG 120 # define LLONG long long 121 #else 122 # define LLONG long 123 #endif 124 125 /* 126 * dopr(): poor man's version of doprintf 127 */ 128 129 /* format read states */ 130 #define DP_S_DEFAULT 0 131 #define DP_S_FLAGS 1 132 #define DP_S_MIN 2 133 #define DP_S_DOT 3 134 #define DP_S_MAX 4 135 #define DP_S_MOD 5 136 #define DP_S_CONV 6 137 #define DP_S_DONE 7 138 139 /* format flags - Bits */ 140 #define DP_F_MINUS (1 << 0) 141 #define DP_F_PLUS (1 << 1) 142 #define DP_F_SPACE (1 << 2) 143 #define DP_F_NUM (1 << 3) 144 #define DP_F_ZERO (1 << 4) 145 #define DP_F_UP (1 << 5) 146 #define DP_F_UNSIGNED (1 << 6) 147 148 /* Conversion Flags */ 149 #define DP_C_SHORT 1 150 #define DP_C_LONG 2 151 #define DP_C_LDOUBLE 3 152 #define DP_C_LLONG 4 153 154 #define char_to_int(p) ((p)- '0') 155 #ifndef MAX 156 # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) 157 #endif 158 159 static size_t dopr(char *buffer, size_t maxlen, const char *format, 160 va_list args_in); 161 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, 162 char *value, int flags, int min, int max); 163 static void fmtint(char *buffer, size_t *currlen, size_t maxlen, 164 long value, int base, int min, int max, int flags); 165 static void fmtfp(char *buffer, size_t *currlen, size_t maxlen, 166 LDOUBLE fvalue, int min, int max, int flags); 167 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c); 168 169 static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) 170 { 171 char ch; 172 LLONG value; 173 LDOUBLE fvalue; 174 char *strvalue; 175 int min; 176 int max; 177 int state; 178 int flags; 179 int cflags; 180 size_t currlen; 181 va_list args; 182 183 VA_COPY(args, args_in); 184 185 state = DP_S_DEFAULT; 186 currlen = flags = cflags = min = 0; 187 max = -1; 188 ch = *format++; 189 190 while (state != DP_S_DONE) { 191 if (ch == '\0') 192 state = DP_S_DONE; 193 194 switch(state) { 195 case DP_S_DEFAULT: 196 if (ch == '%') 197 state = DP_S_FLAGS; 198 else 199 dopr_outch (buffer, &currlen, maxlen, ch); 200 ch = *format++; 201 break; 202 case DP_S_FLAGS: 203 switch (ch) { 204 case '-': 205 flags |= DP_F_MINUS; 206 ch = *format++; 207 break; 208 case '+': 209 flags |= DP_F_PLUS; 210 ch = *format++; 211 break; 212 case ' ': 213 flags |= DP_F_SPACE; 214 ch = *format++; 215 break; 216 case '#': 217 flags |= DP_F_NUM; 218 ch = *format++; 219 break; 220 case '0': 221 flags |= DP_F_ZERO; 222 ch = *format++; 223 break; 224 default: 225 state = DP_S_MIN; 226 break; 227 } 228 break; 229 case DP_S_MIN: 230 if (isdigit((unsigned char)ch)) { 231 min = 10*min + char_to_int (ch); 232 ch = *format++; 233 } else if (ch == '*') { 234 min = va_arg (args, int); 235 ch = *format++; 236 state = DP_S_DOT; 237 } else { 238 state = DP_S_DOT; 239 } 240 break; 241 case DP_S_DOT: 242 if (ch == '.') { 243 state = DP_S_MAX; 244 ch = *format++; 245 } else { 246 state = DP_S_MOD; 247 } 248 break; 249 case DP_S_MAX: 250 if (isdigit((unsigned char)ch)) { 251 if (max < 0) 252 max = 0; 253 max = 10*max + char_to_int (ch); 254 ch = *format++; 255 } else if (ch == '*') { 256 max = va_arg (args, int); 257 ch = *format++; 258 state = DP_S_MOD; 259 } else { 260 state = DP_S_MOD; 261 } 262 break; 263 case DP_S_MOD: 264 switch (ch) { 265 case 'h': 266 cflags = DP_C_SHORT; 267 ch = *format++; 268 break; 269 case 'l': 270 cflags = DP_C_LONG; 271 ch = *format++; 272 if (ch == 'l') { /* It's a long long */ 273 cflags = DP_C_LLONG; 274 ch = *format++; 275 } 276 break; 277 case 'L': 278 cflags = DP_C_LDOUBLE; 279 ch = *format++; 280 break; 281 default: 282 break; 283 } 284 state = DP_S_CONV; 285 break; 286 case DP_S_CONV: 287 switch (ch) { 288 case 'd': 289 case 'i': 290 if (cflags == DP_C_SHORT) 291 value = va_arg (args, int); 292 else if (cflags == DP_C_LONG) 293 value = va_arg (args, long int); 294 else if (cflags == DP_C_LLONG) 295 value = va_arg (args, LLONG); 296 else 297 value = va_arg (args, int); 298 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 299 break; 300 case 'o': 301 flags |= DP_F_UNSIGNED; 302 if (cflags == DP_C_SHORT) 303 value = va_arg (args, unsigned int); 304 else if (cflags == DP_C_LONG) 305 value = (long)va_arg (args, unsigned long int); 306 else if (cflags == DP_C_LLONG) 307 value = (long)va_arg (args, unsigned LLONG); 308 else 309 value = (long)va_arg (args, unsigned int); 310 fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); 311 break; 312 case 'u': 313 flags |= DP_F_UNSIGNED; 314 if (cflags == DP_C_SHORT) 315 value = va_arg (args, unsigned int); 316 else if (cflags == DP_C_LONG) 317 value = (long)va_arg (args, unsigned long int); 318 else if (cflags == DP_C_LLONG) 319 value = (LLONG)va_arg (args, unsigned LLONG); 320 else 321 value = (long)va_arg (args, unsigned int); 322 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 323 break; 324 case 'X': 325 flags |= DP_F_UP; 326 case 'x': 327 flags |= DP_F_UNSIGNED; 328 if (cflags == DP_C_SHORT) 329 value = va_arg (args, unsigned int); 330 else if (cflags == DP_C_LONG) 331 value = (long)va_arg (args, unsigned long int); 332 else if (cflags == DP_C_LLONG) 333 value = (LLONG)va_arg (args, unsigned LLONG); 334 else 335 value = (long)va_arg (args, unsigned int); 336 fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); 337 break; 338 case 'f': 339 if (cflags == DP_C_LDOUBLE) 340 fvalue = va_arg (args, LDOUBLE); 341 else 342 fvalue = va_arg (args, double); 343 /* um, floating point? */ 344 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 345 break; 346 case 'E': 347 flags |= DP_F_UP; 348 case 'e': 349 if (cflags == DP_C_LDOUBLE) 350 fvalue = va_arg (args, LDOUBLE); 351 else 352 fvalue = va_arg (args, double); 353 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 354 break; 355 case 'G': 356 flags |= DP_F_UP; 357 case 'g': 358 if (cflags == DP_C_LDOUBLE) 359 fvalue = va_arg (args, LDOUBLE); 360 else 361 fvalue = va_arg (args, double); 362 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 363 break; 364 case 'c': 365 dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); 366 break; 367 case 's': 368 strvalue = va_arg (args, char *); 369 if (!strvalue) strvalue = "(NULL)"; 370 if (max == -1) { 371 max = strlen(strvalue); 372 } 373 if (min > 0 && max >= 0 && min > max) max = min; 374 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); 375 break; 376 case 'p': 377 strvalue = va_arg (args, void *); 378 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); 379 break; 380 case 'n': 381 if (cflags == DP_C_SHORT) { 382 short int *num; 383 num = va_arg (args, short int *); 384 *num = currlen; 385 } else if (cflags == DP_C_LONG) { 386 long int *num; 387 num = va_arg (args, long int *); 388 *num = (long int)currlen; 389 } else if (cflags == DP_C_LLONG) { 390 LLONG *num; 391 num = va_arg (args, LLONG *); 392 *num = (LLONG)currlen; 393 } else { 394 int *num; 395 num = va_arg (args, int *); 396 *num = currlen; 397 } 398 break; 399 case '%': 400 dopr_outch (buffer, &currlen, maxlen, ch); 401 break; 402 case 'w': 403 /* not supported yet, treat as next char */ 404 ch = *format++; 405 break; 406 default: 407 /* Unknown, skip */ 408 break; 409 } 410 ch = *format++; 411 state = DP_S_DEFAULT; 412 flags = cflags = min = 0; 413 max = -1; 414 break; 415 case DP_S_DONE: 416 break; 417 default: 418 /* hmm? */ 419 break; /* some picky compilers need this */ 420 } 421 } 422 if (maxlen != 0) { 423 if (currlen < maxlen - 1) 424 buffer[currlen] = '\0'; 425 else if (maxlen > 0) 426 buffer[maxlen - 1] = '\0'; 427 } 428 429 return currlen; 430 } 431 432 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, 433 char *value, int flags, int min, int max) 434 { 435 int padlen, strln; /* amount to pad */ 436 int cnt = 0; 437 438 #ifdef DEBUG_SNPRINTF 439 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); 440 #endif 441 if (value == 0) { 442 value = "<NULL>"; 443 } 444 445 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ 446 padlen = min - strln; 447 if (padlen < 0) 448 padlen = 0; 449 if (flags & DP_F_MINUS) 450 padlen = -padlen; /* Left Justify */ 451 452 while ((padlen > 0) && (cnt < max)) { 453 dopr_outch (buffer, currlen, maxlen, ' '); 454 --padlen; 455 ++cnt; 456 } 457 while (*value && (cnt < max)) { 458 dopr_outch (buffer, currlen, maxlen, *value++); 459 ++cnt; 460 } 461 while ((padlen < 0) && (cnt < max)) { 462 dopr_outch (buffer, currlen, maxlen, ' '); 463 ++padlen; 464 ++cnt; 465 } 466 } 467 468 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ 469 470 static void fmtint(char *buffer, size_t *currlen, size_t maxlen, 471 long value, int base, int min, int max, int flags) 472 { 473 int signvalue = 0; 474 unsigned long uvalue; 475 char convert[20]; 476 int place = 0; 477 int spadlen = 0; /* amount to space pad */ 478 int zpadlen = 0; /* amount to zero pad */ 479 int caps = 0; 480 481 if (max < 0) 482 max = 0; 483 484 uvalue = value; 485 486 if(!(flags & DP_F_UNSIGNED)) { 487 if( value < 0 ) { 488 signvalue = '-'; 489 uvalue = -value; 490 } else { 491 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 492 signvalue = '+'; 493 else if (flags & DP_F_SPACE) 494 signvalue = ' '; 495 } 496 } 497 498 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 499 500 do { 501 convert[place++] = 502 (caps? "0123456789ABCDEF":"0123456789abcdef") 503 [uvalue % (unsigned)base ]; 504 uvalue = (uvalue / (unsigned)base ); 505 } while(uvalue && (place < 20)); 506 if (place == 20) place--; 507 convert[place] = 0; 508 509 zpadlen = max - place; 510 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 511 if (zpadlen < 0) zpadlen = 0; 512 if (spadlen < 0) spadlen = 0; 513 if (flags & DP_F_ZERO) { 514 zpadlen = MAX(zpadlen, spadlen); 515 spadlen = 0; 516 } 517 if (flags & DP_F_MINUS) 518 spadlen = -spadlen; /* Left Justifty */ 519 520 #ifdef DEBUG_SNPRINTF 521 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 522 zpadlen, spadlen, min, max, place); 523 #endif 524 525 /* Spaces */ 526 while (spadlen > 0) { 527 dopr_outch (buffer, currlen, maxlen, ' '); 528 --spadlen; 529 } 530 531 /* Sign */ 532 if (signvalue) 533 dopr_outch (buffer, currlen, maxlen, signvalue); 534 535 /* Zeros */ 536 if (zpadlen > 0) { 537 while (zpadlen > 0) { 538 dopr_outch (buffer, currlen, maxlen, '0'); 539 --zpadlen; 540 } 541 } 542 543 /* Digits */ 544 while (place > 0) 545 dopr_outch (buffer, currlen, maxlen, convert[--place]); 546 547 /* Left Justified spaces */ 548 while (spadlen < 0) { 549 dopr_outch (buffer, currlen, maxlen, ' '); 550 ++spadlen; 551 } 552 } 553 554 static LDOUBLE abs_val(LDOUBLE value) 555 { 556 LDOUBLE result = value; 557 558 if (value < 0) 559 result = -value; 560 561 return result; 562 } 563 564 static LDOUBLE POW10(int exp) 565 { 566 LDOUBLE result = 1; 567 568 while (exp) { 569 result *= 10; 570 exp--; 571 } 572 573 return result; 574 } 575 576 static LLONG ROUND(LDOUBLE value) 577 { 578 LLONG intpart; 579 580 intpart = (LLONG)value; 581 value = value - intpart; 582 if (value >= 0.5) intpart++; 583 584 return intpart; 585 } 586 587 /* a replacement for modf that doesn't need the math library. Should 588 be portable, but slow */ 589 static double my_modf(double x0, double *iptr) 590 { 591 int i; 592 long l; 593 double x = x0; 594 double f = 1.0; 595 596 for (i=0;i<100;i++) { 597 l = (long)x; 598 if (l <= (x+1) && l >= (x-1)) break; 599 x *= 0.1; 600 f *= 10.0; 601 } 602 603 if (i == 100) { 604 /* yikes! the number is beyond what we can handle. What do we do? */ 605 (*iptr) = 0; 606 return 0; 607 } 608 609 if (i != 0) { 610 double i2; 611 double ret; 612 613 ret = my_modf(x0-l*f, &i2); 614 (*iptr) = l*f + i2; 615 return ret; 616 } 617 618 (*iptr) = l; 619 return x - (*iptr); 620 } 621 622 623 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, 624 LDOUBLE fvalue, int min, int max, int flags) 625 { 626 int signvalue = 0; 627 double ufvalue; 628 char iconvert[311]; 629 char fconvert[311]; 630 int iplace = 0; 631 int fplace = 0; 632 int padlen = 0; /* amount to pad */ 633 int zpadlen = 0; 634 int caps = 0; 635 int idx; 636 double intpart; 637 double fracpart; 638 double temp; 639 640 /* 641 * AIX manpage says the default is 0, but Solaris says the default 642 * is 6, and sprintf on AIX defaults to 6 643 */ 644 if (max < 0) 645 max = 6; 646 647 ufvalue = abs_val (fvalue); 648 649 if (fvalue < 0) { 650 signvalue = '-'; 651 } else { 652 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ 653 signvalue = '+'; 654 } else { 655 if (flags & DP_F_SPACE) 656 signvalue = ' '; 657 } 658 } 659 660 #if 0 661 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 662 #endif 663 664 #if 0 665 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ 666 #endif 667 668 /* 669 * Sorry, we only support 16 digits past the decimal because of our 670 * conversion method 671 */ 672 if (max > 16) 673 max = 16; 674 675 /* We "cheat" by converting the fractional part to integer by 676 * multiplying by a factor of 10 677 */ 678 679 temp = ufvalue; 680 my_modf(temp, &intpart); 681 682 fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); 683 684 if (fracpart >= POW10(max)) { 685 intpart++; 686 fracpart -= POW10(max); 687 } 688 689 /* Convert integer part */ 690 do { 691 temp = intpart*0.1; 692 my_modf(temp, &intpart); 693 idx = (int) ((temp -intpart +0.05)* 10.0); 694 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ 695 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ 696 iconvert[iplace++] = 697 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 698 } while (intpart && (iplace < 311)); 699 if (iplace == 311) iplace--; 700 iconvert[iplace] = 0; 701 702 /* Convert fractional part */ 703 if (fracpart) 704 { 705 do { 706 temp = fracpart*0.1; 707 my_modf(temp, &fracpart); 708 idx = (int) ((temp -fracpart +0.05)* 10.0); 709 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ 710 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ 711 fconvert[fplace++] = 712 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 713 } while(fracpart && (fplace < 311)); 714 if (fplace == 311) fplace--; 715 } 716 fconvert[fplace] = 0; 717 718 /* -1 for decimal point, another -1 if we are printing a sign */ 719 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 720 zpadlen = max - fplace; 721 if (zpadlen < 0) zpadlen = 0; 722 if (padlen < 0) 723 padlen = 0; 724 if (flags & DP_F_MINUS) 725 padlen = -padlen; /* Left Justifty */ 726 727 if ((flags & DP_F_ZERO) && (padlen > 0)) { 728 if (signvalue) { 729 dopr_outch (buffer, currlen, maxlen, signvalue); 730 --padlen; 731 signvalue = 0; 732 } 733 while (padlen > 0) { 734 dopr_outch (buffer, currlen, maxlen, '0'); 735 --padlen; 736 } 737 } 738 while (padlen > 0) { 739 dopr_outch (buffer, currlen, maxlen, ' '); 740 --padlen; 741 } 742 if (signvalue) 743 dopr_outch (buffer, currlen, maxlen, signvalue); 744 745 while (iplace > 0) 746 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); 747 748 #ifdef DEBUG_SNPRINTF 749 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); 750 #endif 751 752 /* 753 * Decimal point. This should probably use locale to find the correct 754 * char to print out. 755 */ 756 if (max > 0) { 757 dopr_outch (buffer, currlen, maxlen, '.'); 758 759 while (zpadlen > 0) { 760 dopr_outch (buffer, currlen, maxlen, '0'); 761 --zpadlen; 762 } 763 764 while (fplace > 0) 765 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); 766 } 767 768 while (padlen < 0) { 769 dopr_outch (buffer, currlen, maxlen, ' '); 770 ++padlen; 771 } 772 } 773 774 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c) 775 { 776 if (*currlen < maxlen) { 777 buffer[(*currlen)] = c; 778 } 779 (*currlen)++; 780 } 781 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ 782 783 #if !defined(HAVE_VSNPRINTF) 784 int vsnprintf (char *str, size_t count, const char *fmt, va_list args) 785 { 786 return dopr(str, count, fmt, args); 787 } 788 #endif 789 790 #if !defined(HAVE_SNPRINTF) 791 int snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) 792 { 793 size_t ret; 794 va_list ap; 795 796 va_start(ap, fmt); 797 ret = vsnprintf(str, count, fmt, ap); 798 va_end(ap); 799 return ret; 800 } 801 #endif 802 803