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 #if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */ 93 # undef HAVE_SNPRINTF 94 # undef HAVE_VSNPRINTF 95 #endif 96 97 #ifndef VA_COPY 98 # ifdef HAVE_VA_COPY 99 # define VA_COPY(dest, src) va_copy(dest, src) 100 # else 101 # ifdef HAVE___VA_COPY 102 # define VA_COPY(dest, src) __va_copy(dest, src) 103 # else 104 # define VA_COPY(dest, src) (dest) = (src) 105 # endif 106 # endif 107 #endif 108 109 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) 110 111 #include <ctype.h> 112 #include <stdarg.h> 113 #include <stdlib.h> 114 #include <string.h> 115 116 #ifdef HAVE_LONG_DOUBLE 117 # define LDOUBLE long double 118 #else 119 # define LDOUBLE double 120 #endif 121 122 #ifdef HAVE_LONG_LONG 123 # define LLONG long long 124 #else 125 # define LLONG long 126 #endif 127 128 /* 129 * dopr(): poor man's version of doprintf 130 */ 131 132 /* format read states */ 133 #define DP_S_DEFAULT 0 134 #define DP_S_FLAGS 1 135 #define DP_S_MIN 2 136 #define DP_S_DOT 3 137 #define DP_S_MAX 4 138 #define DP_S_MOD 5 139 #define DP_S_CONV 6 140 #define DP_S_DONE 7 141 142 /* format flags - Bits */ 143 #define DP_F_MINUS (1 << 0) 144 #define DP_F_PLUS (1 << 1) 145 #define DP_F_SPACE (1 << 2) 146 #define DP_F_NUM (1 << 3) 147 #define DP_F_ZERO (1 << 4) 148 #define DP_F_UP (1 << 5) 149 #define DP_F_UNSIGNED (1 << 6) 150 151 /* Conversion Flags */ 152 #define DP_C_SHORT 1 153 #define DP_C_LONG 2 154 #define DP_C_LDOUBLE 3 155 #define DP_C_LLONG 4 156 157 #define char_to_int(p) ((p)- '0') 158 #ifndef MAX 159 # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) 160 #endif 161 162 static size_t dopr(char *buffer, size_t maxlen, const char *format, 163 va_list args_in); 164 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, 165 char *value, int flags, int min, int max); 166 static void fmtint(char *buffer, size_t *currlen, size_t maxlen, 167 LLONG value, int base, int min, int max, int flags); 168 static void fmtfp(char *buffer, size_t *currlen, size_t maxlen, 169 LDOUBLE fvalue, int min, int max, int flags); 170 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c); 171 172 static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) 173 { 174 char ch; 175 LLONG value; 176 LDOUBLE fvalue; 177 char *strvalue; 178 int min; 179 int max; 180 int state; 181 int flags; 182 int cflags; 183 size_t currlen; 184 va_list args; 185 186 VA_COPY(args, args_in); 187 188 state = DP_S_DEFAULT; 189 currlen = flags = cflags = min = 0; 190 max = -1; 191 ch = *format++; 192 193 while (state != DP_S_DONE) { 194 if (ch == '\0') 195 state = DP_S_DONE; 196 197 switch(state) { 198 case DP_S_DEFAULT: 199 if (ch == '%') 200 state = DP_S_FLAGS; 201 else 202 dopr_outch (buffer, &currlen, maxlen, ch); 203 ch = *format++; 204 break; 205 case DP_S_FLAGS: 206 switch (ch) { 207 case '-': 208 flags |= DP_F_MINUS; 209 ch = *format++; 210 break; 211 case '+': 212 flags |= DP_F_PLUS; 213 ch = *format++; 214 break; 215 case ' ': 216 flags |= DP_F_SPACE; 217 ch = *format++; 218 break; 219 case '#': 220 flags |= DP_F_NUM; 221 ch = *format++; 222 break; 223 case '0': 224 flags |= DP_F_ZERO; 225 ch = *format++; 226 break; 227 default: 228 state = DP_S_MIN; 229 break; 230 } 231 break; 232 case DP_S_MIN: 233 if (isdigit((unsigned char)ch)) { 234 min = 10*min + char_to_int (ch); 235 ch = *format++; 236 } else if (ch == '*') { 237 min = va_arg (args, int); 238 ch = *format++; 239 state = DP_S_DOT; 240 } else { 241 state = DP_S_DOT; 242 } 243 break; 244 case DP_S_DOT: 245 if (ch == '.') { 246 state = DP_S_MAX; 247 ch = *format++; 248 } else { 249 state = DP_S_MOD; 250 } 251 break; 252 case DP_S_MAX: 253 if (isdigit((unsigned char)ch)) { 254 if (max < 0) 255 max = 0; 256 max = 10*max + char_to_int (ch); 257 ch = *format++; 258 } else if (ch == '*') { 259 max = va_arg (args, int); 260 ch = *format++; 261 state = DP_S_MOD; 262 } else { 263 state = DP_S_MOD; 264 } 265 break; 266 case DP_S_MOD: 267 switch (ch) { 268 case 'h': 269 cflags = DP_C_SHORT; 270 ch = *format++; 271 break; 272 case 'l': 273 cflags = DP_C_LONG; 274 ch = *format++; 275 if (ch == 'l') { /* It's a long long */ 276 cflags = DP_C_LLONG; 277 ch = *format++; 278 } 279 break; 280 case 'L': 281 cflags = DP_C_LDOUBLE; 282 ch = *format++; 283 break; 284 default: 285 break; 286 } 287 state = DP_S_CONV; 288 break; 289 case DP_S_CONV: 290 switch (ch) { 291 case 'd': 292 case 'i': 293 if (cflags == DP_C_SHORT) 294 value = va_arg (args, int); 295 else if (cflags == DP_C_LONG) 296 value = va_arg (args, long int); 297 else if (cflags == DP_C_LLONG) 298 value = va_arg (args, LLONG); 299 else 300 value = va_arg (args, int); 301 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 302 break; 303 case 'o': 304 flags |= DP_F_UNSIGNED; 305 if (cflags == DP_C_SHORT) 306 value = va_arg (args, unsigned int); 307 else if (cflags == DP_C_LONG) 308 value = (long)va_arg (args, unsigned long int); 309 else if (cflags == DP_C_LLONG) 310 value = (long)va_arg (args, unsigned LLONG); 311 else 312 value = (long)va_arg (args, unsigned int); 313 fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); 314 break; 315 case 'u': 316 flags |= DP_F_UNSIGNED; 317 if (cflags == DP_C_SHORT) 318 value = va_arg (args, unsigned int); 319 else if (cflags == DP_C_LONG) 320 value = (long)va_arg (args, unsigned long int); 321 else if (cflags == DP_C_LLONG) 322 value = (LLONG)va_arg (args, unsigned LLONG); 323 else 324 value = (long)va_arg (args, unsigned int); 325 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); 326 break; 327 case 'X': 328 flags |= DP_F_UP; 329 case 'x': 330 flags |= DP_F_UNSIGNED; 331 if (cflags == DP_C_SHORT) 332 value = va_arg (args, unsigned int); 333 else if (cflags == DP_C_LONG) 334 value = (long)va_arg (args, unsigned long int); 335 else if (cflags == DP_C_LLONG) 336 value = (LLONG)va_arg (args, unsigned LLONG); 337 else 338 value = (long)va_arg (args, unsigned int); 339 fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); 340 break; 341 case 'f': 342 if (cflags == DP_C_LDOUBLE) 343 fvalue = va_arg (args, LDOUBLE); 344 else 345 fvalue = va_arg (args, double); 346 /* um, floating point? */ 347 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 348 break; 349 case 'E': 350 flags |= DP_F_UP; 351 case 'e': 352 if (cflags == DP_C_LDOUBLE) 353 fvalue = va_arg (args, LDOUBLE); 354 else 355 fvalue = va_arg (args, double); 356 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 357 break; 358 case 'G': 359 flags |= DP_F_UP; 360 case 'g': 361 if (cflags == DP_C_LDOUBLE) 362 fvalue = va_arg (args, LDOUBLE); 363 else 364 fvalue = va_arg (args, double); 365 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); 366 break; 367 case 'c': 368 dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); 369 break; 370 case 's': 371 strvalue = va_arg (args, char *); 372 if (!strvalue) strvalue = "(NULL)"; 373 if (max == -1) { 374 max = strlen(strvalue); 375 } 376 if (min > 0 && max >= 0 && min > max) max = min; 377 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); 378 break; 379 case 'p': 380 strvalue = va_arg (args, void *); 381 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); 382 break; 383 case 'n': 384 if (cflags == DP_C_SHORT) { 385 short int *num; 386 num = va_arg (args, short int *); 387 *num = currlen; 388 } else if (cflags == DP_C_LONG) { 389 long int *num; 390 num = va_arg (args, long int *); 391 *num = (long int)currlen; 392 } else if (cflags == DP_C_LLONG) { 393 LLONG *num; 394 num = va_arg (args, LLONG *); 395 *num = (LLONG)currlen; 396 } else { 397 int *num; 398 num = va_arg (args, int *); 399 *num = currlen; 400 } 401 break; 402 case '%': 403 dopr_outch (buffer, &currlen, maxlen, ch); 404 break; 405 case 'w': 406 /* not supported yet, treat as next char */ 407 ch = *format++; 408 break; 409 default: 410 /* Unknown, skip */ 411 break; 412 } 413 ch = *format++; 414 state = DP_S_DEFAULT; 415 flags = cflags = min = 0; 416 max = -1; 417 break; 418 case DP_S_DONE: 419 break; 420 default: 421 /* hmm? */ 422 break; /* some picky compilers need this */ 423 } 424 } 425 if (maxlen != 0) { 426 if (currlen < maxlen - 1) 427 buffer[currlen] = '\0'; 428 else if (maxlen > 0) 429 buffer[maxlen - 1] = '\0'; 430 } 431 432 return currlen; 433 } 434 435 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, 436 char *value, int flags, int min, int max) 437 { 438 int padlen, strln; /* amount to pad */ 439 int cnt = 0; 440 441 #ifdef DEBUG_SNPRINTF 442 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); 443 #endif 444 if (value == 0) { 445 value = "<NULL>"; 446 } 447 448 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ 449 padlen = min - strln; 450 if (padlen < 0) 451 padlen = 0; 452 if (flags & DP_F_MINUS) 453 padlen = -padlen; /* Left Justify */ 454 455 while ((padlen > 0) && (cnt < max)) { 456 dopr_outch (buffer, currlen, maxlen, ' '); 457 --padlen; 458 ++cnt; 459 } 460 while (*value && (cnt < max)) { 461 dopr_outch (buffer, currlen, maxlen, *value++); 462 ++cnt; 463 } 464 while ((padlen < 0) && (cnt < max)) { 465 dopr_outch (buffer, currlen, maxlen, ' '); 466 ++padlen; 467 ++cnt; 468 } 469 } 470 471 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ 472 473 static void fmtint(char *buffer, size_t *currlen, size_t maxlen, 474 LLONG value, int base, int min, int max, int flags) 475 { 476 int signvalue = 0; 477 unsigned LLONG uvalue; 478 char convert[20]; 479 int place = 0; 480 int spadlen = 0; /* amount to space pad */ 481 int zpadlen = 0; /* amount to zero pad */ 482 int caps = 0; 483 484 if (max < 0) 485 max = 0; 486 487 uvalue = value; 488 489 if(!(flags & DP_F_UNSIGNED)) { 490 if( value < 0 ) { 491 signvalue = '-'; 492 uvalue = -value; 493 } else { 494 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 495 signvalue = '+'; 496 else if (flags & DP_F_SPACE) 497 signvalue = ' '; 498 } 499 } 500 501 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 502 503 do { 504 convert[place++] = 505 (caps? "0123456789ABCDEF":"0123456789abcdef") 506 [uvalue % (unsigned)base ]; 507 uvalue = (uvalue / (unsigned)base ); 508 } while(uvalue && (place < 20)); 509 if (place == 20) place--; 510 convert[place] = 0; 511 512 zpadlen = max - place; 513 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 514 if (zpadlen < 0) zpadlen = 0; 515 if (spadlen < 0) spadlen = 0; 516 if (flags & DP_F_ZERO) { 517 zpadlen = MAX(zpadlen, spadlen); 518 spadlen = 0; 519 } 520 if (flags & DP_F_MINUS) 521 spadlen = -spadlen; /* Left Justifty */ 522 523 #ifdef DEBUG_SNPRINTF 524 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 525 zpadlen, spadlen, min, max, place); 526 #endif 527 528 /* Spaces */ 529 while (spadlen > 0) { 530 dopr_outch (buffer, currlen, maxlen, ' '); 531 --spadlen; 532 } 533 534 /* Sign */ 535 if (signvalue) 536 dopr_outch (buffer, currlen, maxlen, signvalue); 537 538 /* Zeros */ 539 if (zpadlen > 0) { 540 while (zpadlen > 0) { 541 dopr_outch (buffer, currlen, maxlen, '0'); 542 --zpadlen; 543 } 544 } 545 546 /* Digits */ 547 while (place > 0) 548 dopr_outch (buffer, currlen, maxlen, convert[--place]); 549 550 /* Left Justified spaces */ 551 while (spadlen < 0) { 552 dopr_outch (buffer, currlen, maxlen, ' '); 553 ++spadlen; 554 } 555 } 556 557 static LDOUBLE abs_val(LDOUBLE value) 558 { 559 LDOUBLE result = value; 560 561 if (value < 0) 562 result = -value; 563 564 return result; 565 } 566 567 static LDOUBLE POW10(int exp) 568 { 569 LDOUBLE result = 1; 570 571 while (exp) { 572 result *= 10; 573 exp--; 574 } 575 576 return result; 577 } 578 579 static LLONG ROUND(LDOUBLE value) 580 { 581 LLONG intpart; 582 583 intpart = (LLONG)value; 584 value = value - intpart; 585 if (value >= 0.5) intpart++; 586 587 return intpart; 588 } 589 590 /* a replacement for modf that doesn't need the math library. Should 591 be portable, but slow */ 592 static double my_modf(double x0, double *iptr) 593 { 594 int i; 595 long l; 596 double x = x0; 597 double f = 1.0; 598 599 for (i=0;i<100;i++) { 600 l = (long)x; 601 if (l <= (x+1) && l >= (x-1)) break; 602 x *= 0.1; 603 f *= 10.0; 604 } 605 606 if (i == 100) { 607 /* yikes! the number is beyond what we can handle. What do we do? */ 608 (*iptr) = 0; 609 return 0; 610 } 611 612 if (i != 0) { 613 double i2; 614 double ret; 615 616 ret = my_modf(x0-l*f, &i2); 617 (*iptr) = l*f + i2; 618 return ret; 619 } 620 621 (*iptr) = l; 622 return x - (*iptr); 623 } 624 625 626 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, 627 LDOUBLE fvalue, int min, int max, int flags) 628 { 629 int signvalue = 0; 630 double ufvalue; 631 char iconvert[311]; 632 char fconvert[311]; 633 int iplace = 0; 634 int fplace = 0; 635 int padlen = 0; /* amount to pad */ 636 int zpadlen = 0; 637 int caps = 0; 638 int idx; 639 double intpart; 640 double fracpart; 641 double temp; 642 643 /* 644 * AIX manpage says the default is 0, but Solaris says the default 645 * is 6, and sprintf on AIX defaults to 6 646 */ 647 if (max < 0) 648 max = 6; 649 650 ufvalue = abs_val (fvalue); 651 652 if (fvalue < 0) { 653 signvalue = '-'; 654 } else { 655 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ 656 signvalue = '+'; 657 } else { 658 if (flags & DP_F_SPACE) 659 signvalue = ' '; 660 } 661 } 662 663 #if 0 664 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 665 #endif 666 667 #if 0 668 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ 669 #endif 670 671 /* 672 * Sorry, we only support 16 digits past the decimal because of our 673 * conversion method 674 */ 675 if (max > 16) 676 max = 16; 677 678 /* We "cheat" by converting the fractional part to integer by 679 * multiplying by a factor of 10 680 */ 681 682 temp = ufvalue; 683 my_modf(temp, &intpart); 684 685 fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); 686 687 if (fracpart >= POW10(max)) { 688 intpart++; 689 fracpart -= POW10(max); 690 } 691 692 /* Convert integer part */ 693 do { 694 temp = intpart*0.1; 695 my_modf(temp, &intpart); 696 idx = (int) ((temp -intpart +0.05)* 10.0); 697 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ 698 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ 699 iconvert[iplace++] = 700 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 701 } while (intpart && (iplace < 311)); 702 if (iplace == 311) iplace--; 703 iconvert[iplace] = 0; 704 705 /* Convert fractional part */ 706 if (fracpart) 707 { 708 do { 709 temp = fracpart*0.1; 710 my_modf(temp, &fracpart); 711 idx = (int) ((temp -fracpart +0.05)* 10.0); 712 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ 713 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ 714 fconvert[fplace++] = 715 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 716 } while(fracpart && (fplace < 311)); 717 if (fplace == 311) fplace--; 718 } 719 fconvert[fplace] = 0; 720 721 /* -1 for decimal point, another -1 if we are printing a sign */ 722 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 723 zpadlen = max - fplace; 724 if (zpadlen < 0) zpadlen = 0; 725 if (padlen < 0) 726 padlen = 0; 727 if (flags & DP_F_MINUS) 728 padlen = -padlen; /* Left Justifty */ 729 730 if ((flags & DP_F_ZERO) && (padlen > 0)) { 731 if (signvalue) { 732 dopr_outch (buffer, currlen, maxlen, signvalue); 733 --padlen; 734 signvalue = 0; 735 } 736 while (padlen > 0) { 737 dopr_outch (buffer, currlen, maxlen, '0'); 738 --padlen; 739 } 740 } 741 while (padlen > 0) { 742 dopr_outch (buffer, currlen, maxlen, ' '); 743 --padlen; 744 } 745 if (signvalue) 746 dopr_outch (buffer, currlen, maxlen, signvalue); 747 748 while (iplace > 0) 749 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); 750 751 #ifdef DEBUG_SNPRINTF 752 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); 753 #endif 754 755 /* 756 * Decimal point. This should probably use locale to find the correct 757 * char to print out. 758 */ 759 if (max > 0) { 760 dopr_outch (buffer, currlen, maxlen, '.'); 761 762 while (zpadlen > 0) { 763 dopr_outch (buffer, currlen, maxlen, '0'); 764 --zpadlen; 765 } 766 767 while (fplace > 0) 768 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); 769 } 770 771 while (padlen < 0) { 772 dopr_outch (buffer, currlen, maxlen, ' '); 773 ++padlen; 774 } 775 } 776 777 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c) 778 { 779 if (*currlen < maxlen) { 780 buffer[(*currlen)] = c; 781 } 782 (*currlen)++; 783 } 784 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ 785 786 #if !defined(HAVE_VSNPRINTF) 787 int vsnprintf (char *str, size_t count, const char *fmt, va_list args) 788 { 789 return dopr(str, count, fmt, args); 790 } 791 #endif 792 793 #if !defined(HAVE_SNPRINTF) 794 int snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) 795 { 796 size_t ret; 797 va_list ap; 798 799 va_start(ap, fmt); 800 ret = vsnprintf(str, count, fmt, ap); 801 va_end(ap); 802 return ret; 803 } 804 #endif 805 806