1 /* 2 * Copyright Patrick Powell 1995 3 * This code is based on code written by Patrick Powell (papowell (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 (at) samba.org) Oct 1998 49 * fixed handling of %.0f 50 * added test for HAVE_LONG_DOUBLE 51 * 52 * tridge (at) samba.org, idra (at) 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 (at) 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 (at) 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 (at) 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 * Damien Miller (djm (at) mindrot.org) Jan 2007 90 * Fix integer overflows in return value. 91 * Make formatting quite a bit faster by inlining dopr_outch() 92 * 93 **************************************************************/ 94 95 #include "includes.h" 96 97 #if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */ 98 # undef HAVE_SNPRINTF 99 # undef HAVE_VSNPRINTF 100 #endif 101 102 #ifndef VA_COPY 103 # ifdef HAVE_VA_COPY 104 # define VA_COPY(dest, src) va_copy(dest, src) 105 # else 106 # ifdef HAVE___VA_COPY 107 # define VA_COPY(dest, src) __va_copy(dest, src) 108 # else 109 # define VA_COPY(dest, src) (dest) = (src) 110 # endif 111 # endif 112 #endif 113 114 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) 115 116 #include <ctype.h> 117 #include <stdarg.h> 118 #include <stdlib.h> 119 #include <string.h> 120 #include <limits.h> 121 #include <errno.h> 122 123 #ifdef HAVE_LONG_DOUBLE 124 # define LDOUBLE long double 125 #else 126 # define LDOUBLE double 127 #endif 128 129 #ifdef HAVE_LONG_LONG 130 # define LLONG long long 131 #else 132 # define LLONG long 133 #endif 134 135 /* 136 * dopr(): poor man's version of doprintf 137 */ 138 139 /* format read states */ 140 #define DP_S_DEFAULT 0 141 #define DP_S_FLAGS 1 142 #define DP_S_MIN 2 143 #define DP_S_DOT 3 144 #define DP_S_MAX 4 145 #define DP_S_MOD 5 146 #define DP_S_CONV 6 147 #define DP_S_DONE 7 148 149 /* format flags - Bits */ 150 #define DP_F_MINUS (1 << 0) 151 #define DP_F_PLUS (1 << 1) 152 #define DP_F_SPACE (1 << 2) 153 #define DP_F_NUM (1 << 3) 154 #define DP_F_ZERO (1 << 4) 155 #define DP_F_UP (1 << 5) 156 #define DP_F_UNSIGNED (1 << 6) 157 158 /* Conversion Flags */ 159 #define DP_C_SHORT 1 160 #define DP_C_LONG 2 161 #define DP_C_LDOUBLE 3 162 #define DP_C_LLONG 4 163 164 #define char_to_int(p) ((p)- '0') 165 #ifndef MAX 166 # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) 167 #endif 168 169 #define DOPR_OUTCH(buf, pos, buflen, thechar) \ 170 do { \ 171 if (pos + 1 >= INT_MAX) { \ 172 errno = ERANGE; \ 173 return -1; \ 174 } \ 175 if (pos < buflen) \ 176 buf[pos] = thechar; \ 177 (pos)++; \ 178 } while (0) 179 180 static int dopr(char *buffer, size_t maxlen, const char *format, 181 va_list args_in); 182 static int fmtstr(char *buffer, size_t *currlen, size_t maxlen, 183 char *value, int flags, int min, int max); 184 static int fmtint(char *buffer, size_t *currlen, size_t maxlen, 185 LLONG value, int base, int min, int max, int flags); 186 static int fmtfp(char *buffer, size_t *currlen, size_t maxlen, 187 LDOUBLE fvalue, int min, int max, int flags); 188 189 static int 190 dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) 191 { 192 char ch; 193 LLONG value; 194 LDOUBLE fvalue; 195 char *strvalue; 196 int min; 197 int max; 198 int state; 199 int flags; 200 int cflags; 201 size_t currlen; 202 va_list args; 203 204 VA_COPY(args, args_in); 205 206 state = DP_S_DEFAULT; 207 currlen = flags = cflags = min = 0; 208 max = -1; 209 ch = *format++; 210 211 while (state != DP_S_DONE) { 212 if (ch == '\0') 213 state = DP_S_DONE; 214 215 switch(state) { 216 case DP_S_DEFAULT: 217 if (ch == '%') 218 state = DP_S_FLAGS; 219 else 220 DOPR_OUTCH(buffer, currlen, maxlen, ch); 221 ch = *format++; 222 break; 223 case DP_S_FLAGS: 224 switch (ch) { 225 case '-': 226 flags |= DP_F_MINUS; 227 ch = *format++; 228 break; 229 case '+': 230 flags |= DP_F_PLUS; 231 ch = *format++; 232 break; 233 case ' ': 234 flags |= DP_F_SPACE; 235 ch = *format++; 236 break; 237 case '#': 238 flags |= DP_F_NUM; 239 ch = *format++; 240 break; 241 case '0': 242 flags |= DP_F_ZERO; 243 ch = *format++; 244 break; 245 default: 246 state = DP_S_MIN; 247 break; 248 } 249 break; 250 case DP_S_MIN: 251 if (isdigit((unsigned char)ch)) { 252 min = 10*min + char_to_int (ch); 253 ch = *format++; 254 } else if (ch == '*') { 255 min = va_arg (args, int); 256 ch = *format++; 257 state = DP_S_DOT; 258 } else { 259 state = DP_S_DOT; 260 } 261 break; 262 case DP_S_DOT: 263 if (ch == '.') { 264 state = DP_S_MAX; 265 ch = *format++; 266 } else { 267 state = DP_S_MOD; 268 } 269 break; 270 case DP_S_MAX: 271 if (isdigit((unsigned char)ch)) { 272 if (max < 0) 273 max = 0; 274 max = 10*max + char_to_int (ch); 275 ch = *format++; 276 } else if (ch == '*') { 277 max = va_arg (args, int); 278 ch = *format++; 279 state = DP_S_MOD; 280 } else { 281 state = DP_S_MOD; 282 } 283 break; 284 case DP_S_MOD: 285 switch (ch) { 286 case 'h': 287 cflags = DP_C_SHORT; 288 ch = *format++; 289 break; 290 case 'l': 291 cflags = DP_C_LONG; 292 ch = *format++; 293 if (ch == 'l') { /* It's a long long */ 294 cflags = DP_C_LLONG; 295 ch = *format++; 296 } 297 break; 298 case 'L': 299 cflags = DP_C_LDOUBLE; 300 ch = *format++; 301 break; 302 default: 303 break; 304 } 305 state = DP_S_CONV; 306 break; 307 case DP_S_CONV: 308 switch (ch) { 309 case 'd': 310 case 'i': 311 if (cflags == DP_C_SHORT) 312 value = va_arg (args, int); 313 else if (cflags == DP_C_LONG) 314 value = va_arg (args, long int); 315 else if (cflags == DP_C_LLONG) 316 value = va_arg (args, LLONG); 317 else 318 value = va_arg (args, int); 319 if (fmtint(buffer, &currlen, maxlen, 320 value, 10, min, max, flags) == -1) 321 return -1; 322 break; 323 case 'o': 324 flags |= DP_F_UNSIGNED; 325 if (cflags == DP_C_SHORT) 326 value = va_arg (args, unsigned int); 327 else if (cflags == DP_C_LONG) 328 value = (long)va_arg (args, unsigned long int); 329 else if (cflags == DP_C_LLONG) 330 value = (long)va_arg (args, unsigned LLONG); 331 else 332 value = (long)va_arg (args, unsigned int); 333 if (fmtint(buffer, &currlen, maxlen, value, 334 8, min, max, flags) == -1) 335 return -1; 336 break; 337 case 'u': 338 flags |= DP_F_UNSIGNED; 339 if (cflags == DP_C_SHORT) 340 value = va_arg (args, unsigned int); 341 else if (cflags == DP_C_LONG) 342 value = (long)va_arg (args, unsigned long int); 343 else if (cflags == DP_C_LLONG) 344 value = (LLONG)va_arg (args, unsigned LLONG); 345 else 346 value = (long)va_arg (args, unsigned int); 347 if (fmtint(buffer, &currlen, maxlen, value, 348 10, min, max, flags) == -1) 349 return -1; 350 break; 351 case 'X': 352 flags |= DP_F_UP; 353 case 'x': 354 flags |= DP_F_UNSIGNED; 355 if (cflags == DP_C_SHORT) 356 value = va_arg (args, unsigned int); 357 else if (cflags == DP_C_LONG) 358 value = (long)va_arg (args, unsigned long int); 359 else if (cflags == DP_C_LLONG) 360 value = (LLONG)va_arg (args, unsigned LLONG); 361 else 362 value = (long)va_arg (args, unsigned int); 363 if (fmtint(buffer, &currlen, maxlen, value, 364 16, min, max, flags) == -1) 365 return -1; 366 break; 367 case 'f': 368 if (cflags == DP_C_LDOUBLE) 369 fvalue = va_arg (args, LDOUBLE); 370 else 371 fvalue = va_arg (args, double); 372 if (fmtfp(buffer, &currlen, maxlen, fvalue, 373 min, max, flags) == -1) 374 return -1; 375 break; 376 case 'E': 377 flags |= DP_F_UP; 378 case 'e': 379 if (cflags == DP_C_LDOUBLE) 380 fvalue = va_arg (args, LDOUBLE); 381 else 382 fvalue = va_arg (args, double); 383 if (fmtfp(buffer, &currlen, maxlen, fvalue, 384 min, max, flags) == -1) 385 return -1; 386 break; 387 case 'G': 388 flags |= DP_F_UP; 389 case 'g': 390 if (cflags == DP_C_LDOUBLE) 391 fvalue = va_arg (args, LDOUBLE); 392 else 393 fvalue = va_arg (args, double); 394 if (fmtfp(buffer, &currlen, maxlen, fvalue, 395 min, max, flags) == -1) 396 return -1; 397 break; 398 case 'c': 399 DOPR_OUTCH(buffer, currlen, maxlen, 400 va_arg (args, int)); 401 break; 402 case 's': 403 strvalue = va_arg (args, char *); 404 if (!strvalue) strvalue = "(NULL)"; 405 if (max == -1) { 406 max = strlen(strvalue); 407 } 408 if (min > 0 && max >= 0 && min > max) max = min; 409 if (fmtstr(buffer, &currlen, maxlen, 410 strvalue, flags, min, max) == -1) 411 return -1; 412 break; 413 case 'p': 414 strvalue = va_arg (args, void *); 415 if (fmtint(buffer, &currlen, maxlen, 416 (long) strvalue, 16, min, max, flags) == -1) 417 return -1; 418 break; 419 case 'n': 420 if (cflags == DP_C_SHORT) { 421 short int *num; 422 num = va_arg (args, short int *); 423 *num = currlen; 424 } else if (cflags == DP_C_LONG) { 425 long int *num; 426 num = va_arg (args, long int *); 427 *num = (long int)currlen; 428 } else if (cflags == DP_C_LLONG) { 429 LLONG *num; 430 num = va_arg (args, LLONG *); 431 *num = (LLONG)currlen; 432 } else { 433 int *num; 434 num = va_arg (args, int *); 435 *num = currlen; 436 } 437 break; 438 case '%': 439 DOPR_OUTCH(buffer, currlen, maxlen, ch); 440 break; 441 case 'w': 442 /* not supported yet, treat as next char */ 443 ch = *format++; 444 break; 445 default: 446 /* Unknown, skip */ 447 break; 448 } 449 ch = *format++; 450 state = DP_S_DEFAULT; 451 flags = cflags = min = 0; 452 max = -1; 453 break; 454 case DP_S_DONE: 455 break; 456 default: 457 /* hmm? */ 458 break; /* some picky compilers need this */ 459 } 460 } 461 if (maxlen != 0) { 462 if (currlen < maxlen - 1) 463 buffer[currlen] = '\0'; 464 else if (maxlen > 0) 465 buffer[maxlen - 1] = '\0'; 466 } 467 468 return currlen < INT_MAX ? (int)currlen : -1; 469 } 470 471 static int 472 fmtstr(char *buffer, size_t *currlen, size_t maxlen, 473 char *value, int flags, int min, int max) 474 { 475 int padlen, strln; /* amount to pad */ 476 int cnt = 0; 477 478 #ifdef DEBUG_SNPRINTF 479 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); 480 #endif 481 if (value == 0) { 482 value = "<NULL>"; 483 } 484 485 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ 486 padlen = min - strln; 487 if (padlen < 0) 488 padlen = 0; 489 if (flags & DP_F_MINUS) 490 padlen = -padlen; /* Left Justify */ 491 492 while ((padlen > 0) && (cnt < max)) { 493 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 494 --padlen; 495 ++cnt; 496 } 497 while (*value && (cnt < max)) { 498 DOPR_OUTCH(buffer, *currlen, maxlen, *value); 499 *value++; 500 ++cnt; 501 } 502 while ((padlen < 0) && (cnt < max)) { 503 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 504 ++padlen; 505 ++cnt; 506 } 507 return 0; 508 } 509 510 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ 511 512 static int 513 fmtint(char *buffer, size_t *currlen, size_t maxlen, 514 LLONG value, int base, int min, int max, int flags) 515 { 516 int signvalue = 0; 517 unsigned LLONG uvalue; 518 char convert[20]; 519 int place = 0; 520 int spadlen = 0; /* amount to space pad */ 521 int zpadlen = 0; /* amount to zero pad */ 522 int caps = 0; 523 524 if (max < 0) 525 max = 0; 526 527 uvalue = value; 528 529 if(!(flags & DP_F_UNSIGNED)) { 530 if( value < 0 ) { 531 signvalue = '-'; 532 uvalue = -value; 533 } else { 534 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 535 signvalue = '+'; 536 else if (flags & DP_F_SPACE) 537 signvalue = ' '; 538 } 539 } 540 541 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 542 543 do { 544 convert[place++] = 545 (caps? "0123456789ABCDEF":"0123456789abcdef") 546 [uvalue % (unsigned)base ]; 547 uvalue = (uvalue / (unsigned)base ); 548 } while(uvalue && (place < 20)); 549 if (place == 20) place--; 550 convert[place] = 0; 551 552 zpadlen = max - place; 553 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 554 if (zpadlen < 0) zpadlen = 0; 555 if (spadlen < 0) spadlen = 0; 556 if (flags & DP_F_ZERO) { 557 zpadlen = MAX(zpadlen, spadlen); 558 spadlen = 0; 559 } 560 if (flags & DP_F_MINUS) 561 spadlen = -spadlen; /* Left Justifty */ 562 563 #ifdef DEBUG_SNPRINTF 564 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 565 zpadlen, spadlen, min, max, place); 566 #endif 567 568 /* Spaces */ 569 while (spadlen > 0) { 570 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 571 --spadlen; 572 } 573 574 /* Sign */ 575 if (signvalue) 576 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 577 578 /* Zeros */ 579 if (zpadlen > 0) { 580 while (zpadlen > 0) { 581 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 582 --zpadlen; 583 } 584 } 585 586 /* Digits */ 587 while (place > 0) { 588 --place; 589 DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]); 590 } 591 592 /* Left Justified spaces */ 593 while (spadlen < 0) { 594 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 595 ++spadlen; 596 } 597 return 0; 598 } 599 600 static LDOUBLE abs_val(LDOUBLE value) 601 { 602 LDOUBLE result = value; 603 604 if (value < 0) 605 result = -value; 606 607 return result; 608 } 609 610 static LDOUBLE POW10(int val) 611 { 612 LDOUBLE result = 1; 613 614 while (val) { 615 result *= 10; 616 val--; 617 } 618 619 return result; 620 } 621 622 static LLONG ROUND(LDOUBLE value) 623 { 624 LLONG intpart; 625 626 intpart = (LLONG)value; 627 value = value - intpart; 628 if (value >= 0.5) intpart++; 629 630 return intpart; 631 } 632 633 /* a replacement for modf that doesn't need the math library. Should 634 be portable, but slow */ 635 static double my_modf(double x0, double *iptr) 636 { 637 int i; 638 long l; 639 double x = x0; 640 double f = 1.0; 641 642 for (i=0;i<100;i++) { 643 l = (long)x; 644 if (l <= (x+1) && l >= (x-1)) break; 645 x *= 0.1; 646 f *= 10.0; 647 } 648 649 if (i == 100) { 650 /* 651 * yikes! the number is beyond what we can handle. 652 * What do we do? 653 */ 654 (*iptr) = 0; 655 return 0; 656 } 657 658 if (i != 0) { 659 double i2; 660 double ret; 661 662 ret = my_modf(x0-l*f, &i2); 663 (*iptr) = l*f + i2; 664 return ret; 665 } 666 667 (*iptr) = l; 668 return x - (*iptr); 669 } 670 671 672 static int 673 fmtfp (char *buffer, size_t *currlen, size_t maxlen, 674 LDOUBLE fvalue, int min, int max, int flags) 675 { 676 int signvalue = 0; 677 double ufvalue; 678 char iconvert[311]; 679 char fconvert[311]; 680 int iplace = 0; 681 int fplace = 0; 682 int padlen = 0; /* amount to pad */ 683 int zpadlen = 0; 684 int caps = 0; 685 int idx; 686 double intpart; 687 double fracpart; 688 double temp; 689 690 /* 691 * AIX manpage says the default is 0, but Solaris says the default 692 * is 6, and sprintf on AIX defaults to 6 693 */ 694 if (max < 0) 695 max = 6; 696 697 ufvalue = abs_val (fvalue); 698 699 if (fvalue < 0) { 700 signvalue = '-'; 701 } else { 702 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ 703 signvalue = '+'; 704 } else { 705 if (flags & DP_F_SPACE) 706 signvalue = ' '; 707 } 708 } 709 710 #if 0 711 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 712 #endif 713 714 #if 0 715 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ 716 #endif 717 718 /* 719 * Sorry, we only support 16 digits past the decimal because of our 720 * conversion method 721 */ 722 if (max > 16) 723 max = 16; 724 725 /* We "cheat" by converting the fractional part to integer by 726 * multiplying by a factor of 10 727 */ 728 729 temp = ufvalue; 730 my_modf(temp, &intpart); 731 732 fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); 733 734 if (fracpart >= POW10(max)) { 735 intpart++; 736 fracpart -= POW10(max); 737 } 738 739 /* Convert integer part */ 740 do { 741 temp = intpart*0.1; 742 my_modf(temp, &intpart); 743 idx = (int) ((temp -intpart +0.05)* 10.0); 744 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ 745 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ 746 iconvert[iplace++] = 747 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 748 } while (intpart && (iplace < 311)); 749 if (iplace == 311) iplace--; 750 iconvert[iplace] = 0; 751 752 /* Convert fractional part */ 753 if (fracpart) 754 { 755 do { 756 temp = fracpart*0.1; 757 my_modf(temp, &fracpart); 758 idx = (int) ((temp -fracpart +0.05)* 10.0); 759 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ 760 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ 761 fconvert[fplace++] = 762 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 763 } while(fracpart && (fplace < 311)); 764 if (fplace == 311) fplace--; 765 } 766 fconvert[fplace] = 0; 767 768 /* -1 for decimal point, another -1 if we are printing a sign */ 769 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 770 zpadlen = max - fplace; 771 if (zpadlen < 0) zpadlen = 0; 772 if (padlen < 0) 773 padlen = 0; 774 if (flags & DP_F_MINUS) 775 padlen = -padlen; /* Left Justifty */ 776 777 if ((flags & DP_F_ZERO) && (padlen > 0)) { 778 if (signvalue) { 779 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 780 --padlen; 781 signvalue = 0; 782 } 783 while (padlen > 0) { 784 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 785 --padlen; 786 } 787 } 788 while (padlen > 0) { 789 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 790 --padlen; 791 } 792 if (signvalue) 793 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 794 795 while (iplace > 0) { 796 --iplace; 797 DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]); 798 } 799 800 #ifdef DEBUG_SNPRINTF 801 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); 802 #endif 803 804 /* 805 * Decimal point. This should probably use locale to find the correct 806 * char to print out. 807 */ 808 if (max > 0) { 809 DOPR_OUTCH(buffer, *currlen, maxlen, '.'); 810 811 while (zpadlen > 0) { 812 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 813 --zpadlen; 814 } 815 816 while (fplace > 0) { 817 --fplace; 818 DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]); 819 } 820 } 821 822 while (padlen < 0) { 823 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 824 ++padlen; 825 } 826 return 0; 827 } 828 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ 829 830 #if !defined(HAVE_VSNPRINTF) 831 int 832 vsnprintf (char *str, size_t count, const char *fmt, va_list args) 833 { 834 return dopr(str, count, fmt, args); 835 } 836 #endif 837 838 #if !defined(HAVE_SNPRINTF) 839 int 840 snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) 841 { 842 size_t ret; 843 va_list ap; 844 845 va_start(ap, fmt); 846 ret = vsnprintf(str, count, fmt, ap); 847 va_end(ap); 848 return ret; 849 } 850 #endif 851
