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 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) 103 104 #include <ctype.h> 105 #include <stdarg.h> 106 #include <stdlib.h> 107 #include <string.h> 108 #include <limits.h> 109 #include <errno.h> 110 111 #ifdef HAVE_LONG_DOUBLE 112 # define LDOUBLE long double 113 #else 114 # define LDOUBLE double 115 #endif 116 117 #ifdef HAVE_LONG_LONG 118 # define LLONG long long 119 #else 120 # define LLONG long 121 #endif 122 123 /* 124 * dopr(): poor man's version of doprintf 125 */ 126 127 /* format read states */ 128 #define DP_S_DEFAULT 0 129 #define DP_S_FLAGS 1 130 #define DP_S_MIN 2 131 #define DP_S_DOT 3 132 #define DP_S_MAX 4 133 #define DP_S_MOD 5 134 #define DP_S_CONV 6 135 #define DP_S_DONE 7 136 137 /* format flags - Bits */ 138 #define DP_F_MINUS (1 << 0) 139 #define DP_F_PLUS (1 << 1) 140 #define DP_F_SPACE (1 << 2) 141 #define DP_F_NUM (1 << 3) 142 #define DP_F_ZERO (1 << 4) 143 #define DP_F_UP (1 << 5) 144 #define DP_F_UNSIGNED (1 << 6) 145 146 /* Conversion Flags */ 147 #define DP_C_SHORT 1 148 #define DP_C_LONG 2 149 #define DP_C_LDOUBLE 3 150 #define DP_C_LLONG 4 151 #define DP_C_SIZE 5 152 #define DP_C_INTMAX 6 153 154 #define char_to_int(p) ((p)- '0') 155 #ifndef MAX 156 # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) 157 #endif 158 159 #define DOPR_OUTCH(buf, pos, buflen, thechar) \ 160 do { \ 161 if (pos + 1 >= INT_MAX) { \ 162 errno = ERANGE; \ 163 return -1; \ 164 } \ 165 if (pos < buflen) \ 166 buf[pos] = thechar; \ 167 (pos)++; \ 168 } while (0) 169 170 static int dopr(char *buffer, size_t maxlen, const char *format, 171 va_list args_in); 172 static int fmtstr(char *buffer, size_t *currlen, size_t maxlen, 173 char *value, int flags, int min, int max); 174 static int fmtint(char *buffer, size_t *currlen, size_t maxlen, 175 intmax_t value, int base, int min, int max, int flags); 176 static int fmtfp(char *buffer, size_t *currlen, size_t maxlen, 177 LDOUBLE fvalue, int min, int max, int flags); 178 179 static int 180 dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) 181 { 182 char ch; 183 intmax_t value; 184 LDOUBLE fvalue; 185 char *strvalue; 186 int min; 187 int max; 188 int state; 189 int flags; 190 int cflags; 191 size_t currlen; 192 va_list args; 193 194 VA_COPY(args, args_in); 195 196 state = DP_S_DEFAULT; 197 currlen = flags = cflags = min = 0; 198 max = -1; 199 ch = *format++; 200 201 while (state != DP_S_DONE) { 202 if (ch == '\0') 203 state = DP_S_DONE; 204 205 switch(state) { 206 case DP_S_DEFAULT: 207 if (ch == '%') 208 state = DP_S_FLAGS; 209 else 210 DOPR_OUTCH(buffer, currlen, maxlen, ch); 211 ch = *format++; 212 break; 213 case DP_S_FLAGS: 214 switch (ch) { 215 case '-': 216 flags |= DP_F_MINUS; 217 ch = *format++; 218 break; 219 case '+': 220 flags |= DP_F_PLUS; 221 ch = *format++; 222 break; 223 case ' ': 224 flags |= DP_F_SPACE; 225 ch = *format++; 226 break; 227 case '#': 228 flags |= DP_F_NUM; 229 ch = *format++; 230 break; 231 case '0': 232 flags |= DP_F_ZERO; 233 ch = *format++; 234 break; 235 default: 236 state = DP_S_MIN; 237 break; 238 } 239 break; 240 case DP_S_MIN: 241 if (isdigit((unsigned char)ch)) { 242 min = 10*min + char_to_int (ch); 243 ch = *format++; 244 } else if (ch == '*') { 245 min = va_arg (args, int); 246 ch = *format++; 247 state = DP_S_DOT; 248 } else { 249 state = DP_S_DOT; 250 } 251 break; 252 case DP_S_DOT: 253 if (ch == '.') { 254 state = DP_S_MAX; 255 ch = *format++; 256 } else { 257 state = DP_S_MOD; 258 } 259 break; 260 case DP_S_MAX: 261 if (isdigit((unsigned char)ch)) { 262 if (max < 0) 263 max = 0; 264 max = 10*max + char_to_int (ch); 265 ch = *format++; 266 } else if (ch == '*') { 267 max = va_arg (args, int); 268 ch = *format++; 269 state = DP_S_MOD; 270 } else { 271 state = DP_S_MOD; 272 } 273 break; 274 case DP_S_MOD: 275 switch (ch) { 276 case 'h': 277 cflags = DP_C_SHORT; 278 ch = *format++; 279 break; 280 case 'j': 281 cflags = DP_C_INTMAX; 282 ch = *format++; 283 break; 284 case 'l': 285 cflags = DP_C_LONG; 286 ch = *format++; 287 if (ch == 'l') { /* It's a long long */ 288 cflags = DP_C_LLONG; 289 ch = *format++; 290 } 291 break; 292 case 'L': 293 cflags = DP_C_LDOUBLE; 294 ch = *format++; 295 break; 296 case 'z': 297 cflags = DP_C_SIZE; 298 ch = *format++; 299 break; 300 default: 301 break; 302 } 303 state = DP_S_CONV; 304 break; 305 case DP_S_CONV: 306 switch (ch) { 307 case 'd': 308 case 'i': 309 if (cflags == DP_C_SHORT) 310 value = va_arg (args, int); 311 else if (cflags == DP_C_LONG) 312 value = va_arg (args, long int); 313 else if (cflags == DP_C_LLONG) 314 value = va_arg (args, LLONG); 315 else if (cflags == DP_C_SIZE) 316 value = va_arg (args, ssize_t); 317 else if (cflags == DP_C_INTMAX) 318 value = va_arg (args, intmax_t); 319 else 320 value = va_arg (args, int); 321 if (fmtint(buffer, &currlen, maxlen, 322 value, 10, min, max, flags) == -1) 323 return -1; 324 break; 325 case 'o': 326 flags |= DP_F_UNSIGNED; 327 if (cflags == DP_C_SHORT) 328 value = va_arg (args, unsigned int); 329 else if (cflags == DP_C_LONG) 330 value = (long)va_arg (args, unsigned long int); 331 else if (cflags == DP_C_LLONG) 332 value = (long)va_arg (args, unsigned LLONG); 333 else if (cflags == DP_C_SIZE) 334 value = va_arg (args, size_t); 335 #ifdef notyet 336 else if (cflags == DP_C_INTMAX) 337 value = va_arg (args, uintmax_t); 338 #endif 339 else 340 value = (long)va_arg (args, unsigned int); 341 if (fmtint(buffer, &currlen, maxlen, value, 342 8, min, max, flags) == -1) 343 return -1; 344 break; 345 case 'u': 346 flags |= DP_F_UNSIGNED; 347 if (cflags == DP_C_SHORT) 348 value = va_arg (args, unsigned int); 349 else if (cflags == DP_C_LONG) 350 value = (long)va_arg (args, unsigned long int); 351 else if (cflags == DP_C_LLONG) 352 value = (LLONG)va_arg (args, unsigned LLONG); 353 else if (cflags == DP_C_SIZE) 354 value = va_arg (args, size_t); 355 #ifdef notyet 356 else if (cflags == DP_C_INTMAX) 357 value = va_arg (args, uintmax_t); 358 #endif 359 else 360 value = (long)va_arg (args, unsigned int); 361 if (fmtint(buffer, &currlen, maxlen, value, 362 10, min, max, flags) == -1) 363 return -1; 364 break; 365 case 'X': 366 flags |= DP_F_UP; 367 case 'x': 368 flags |= DP_F_UNSIGNED; 369 if (cflags == DP_C_SHORT) 370 value = va_arg (args, unsigned int); 371 else if (cflags == DP_C_LONG) 372 value = (long)va_arg (args, unsigned long int); 373 else if (cflags == DP_C_LLONG) 374 value = (LLONG)va_arg (args, unsigned LLONG); 375 else if (cflags == DP_C_SIZE) 376 value = va_arg (args, size_t); 377 #ifdef notyet 378 else if (cflags == DP_C_INTMAX) 379 value = va_arg (args, uintmax_t); 380 #endif 381 else 382 value = (long)va_arg (args, unsigned int); 383 if (fmtint(buffer, &currlen, maxlen, value, 384 16, min, max, flags) == -1) 385 return -1; 386 break; 387 case 'f': 388 if (cflags == DP_C_LDOUBLE) 389 fvalue = va_arg (args, LDOUBLE); 390 else 391 fvalue = va_arg (args, double); 392 if (fmtfp(buffer, &currlen, maxlen, fvalue, 393 min, max, flags) == -1) 394 return -1; 395 break; 396 case 'E': 397 flags |= DP_F_UP; 398 case 'e': 399 if (cflags == DP_C_LDOUBLE) 400 fvalue = va_arg (args, LDOUBLE); 401 else 402 fvalue = va_arg (args, double); 403 if (fmtfp(buffer, &currlen, maxlen, fvalue, 404 min, max, flags) == -1) 405 return -1; 406 break; 407 case 'G': 408 flags |= DP_F_UP; 409 case 'g': 410 if (cflags == DP_C_LDOUBLE) 411 fvalue = va_arg (args, LDOUBLE); 412 else 413 fvalue = va_arg (args, double); 414 if (fmtfp(buffer, &currlen, maxlen, fvalue, 415 min, max, flags) == -1) 416 return -1; 417 break; 418 case 'c': 419 DOPR_OUTCH(buffer, currlen, maxlen, 420 va_arg (args, int)); 421 break; 422 case 's': 423 strvalue = va_arg (args, char *); 424 if (!strvalue) strvalue = "(NULL)"; 425 if (max == -1) { 426 max = strlen(strvalue); 427 } 428 if (min > 0 && max >= 0 && min > max) max = min; 429 if (fmtstr(buffer, &currlen, maxlen, 430 strvalue, flags, min, max) == -1) 431 return -1; 432 break; 433 case 'p': 434 strvalue = va_arg (args, void *); 435 if (fmtint(buffer, &currlen, maxlen, 436 (long) strvalue, 16, min, max, flags) == -1) 437 return -1; 438 break; 439 #if we_dont_want_this_in_openssh 440 case 'n': 441 if (cflags == DP_C_SHORT) { 442 short int *num; 443 num = va_arg (args, short int *); 444 *num = currlen; 445 } else if (cflags == DP_C_LONG) { 446 long int *num; 447 num = va_arg (args, long int *); 448 *num = (long int)currlen; 449 } else if (cflags == DP_C_LLONG) { 450 LLONG *num; 451 num = va_arg (args, LLONG *); 452 *num = (LLONG)currlen; 453 } else if (cflags == DP_C_SIZE) { 454 ssize_t *num; 455 num = va_arg (args, ssize_t *); 456 *num = (ssize_t)currlen; 457 } else if (cflags == DP_C_INTMAX) { 458 intmax_t *num; 459 num = va_arg (args, intmax_t *); 460 *num = (intmax_t)currlen; 461 } else { 462 int *num; 463 num = va_arg (args, int *); 464 *num = currlen; 465 } 466 break; 467 #endif 468 case '%': 469 DOPR_OUTCH(buffer, currlen, maxlen, ch); 470 break; 471 case 'w': 472 /* not supported yet, treat as next char */ 473 ch = *format++; 474 break; 475 default: 476 /* Unknown, skip */ 477 break; 478 } 479 ch = *format++; 480 state = DP_S_DEFAULT; 481 flags = cflags = min = 0; 482 max = -1; 483 break; 484 case DP_S_DONE: 485 break; 486 default: 487 /* hmm? */ 488 break; /* some picky compilers need this */ 489 } 490 } 491 if (maxlen != 0) { 492 if (currlen < maxlen - 1) 493 buffer[currlen] = '\0'; 494 else if (maxlen > 0) 495 buffer[maxlen - 1] = '\0'; 496 } 497 498 return currlen < INT_MAX ? (int)currlen : -1; 499 } 500 501 static int 502 fmtstr(char *buffer, size_t *currlen, size_t maxlen, 503 char *value, int flags, int min, int max) 504 { 505 int padlen, strln; /* amount to pad */ 506 int cnt = 0; 507 508 #ifdef DEBUG_SNPRINTF 509 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); 510 #endif 511 if (value == 0) { 512 value = "<NULL>"; 513 } 514 515 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ 516 padlen = min - strln; 517 if (padlen < 0) 518 padlen = 0; 519 if (flags & DP_F_MINUS) 520 padlen = -padlen; /* Left Justify */ 521 522 while ((padlen > 0) && (cnt < max)) { 523 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 524 --padlen; 525 ++cnt; 526 } 527 while (*value && (cnt < max)) { 528 DOPR_OUTCH(buffer, *currlen, maxlen, *value); 529 value++; 530 ++cnt; 531 } 532 while ((padlen < 0) && (cnt < max)) { 533 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 534 ++padlen; 535 ++cnt; 536 } 537 return 0; 538 } 539 540 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ 541 542 static int 543 fmtint(char *buffer, size_t *currlen, size_t maxlen, 544 intmax_t value, int base, int min, int max, int flags) 545 { 546 int signvalue = 0; 547 unsigned LLONG uvalue; 548 char convert[20]; 549 int place = 0; 550 int spadlen = 0; /* amount to space pad */ 551 int zpadlen = 0; /* amount to zero pad */ 552 int caps = 0; 553 554 if (max < 0) 555 max = 0; 556 557 uvalue = value; 558 559 if(!(flags & DP_F_UNSIGNED)) { 560 if( value < 0 ) { 561 signvalue = '-'; 562 uvalue = -value; 563 } else { 564 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 565 signvalue = '+'; 566 else if (flags & DP_F_SPACE) 567 signvalue = ' '; 568 } 569 } 570 571 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 572 573 do { 574 convert[place++] = 575 (caps? "0123456789ABCDEF":"0123456789abcdef") 576 [uvalue % (unsigned)base ]; 577 uvalue = (uvalue / (unsigned)base ); 578 } while(uvalue && (place < 20)); 579 if (place == 20) place--; 580 convert[place] = 0; 581 582 zpadlen = max - place; 583 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 584 if (zpadlen < 0) zpadlen = 0; 585 if (spadlen < 0) spadlen = 0; 586 if (flags & DP_F_ZERO) { 587 zpadlen = MAX(zpadlen, spadlen); 588 spadlen = 0; 589 } 590 if (flags & DP_F_MINUS) 591 spadlen = -spadlen; /* Left Justifty */ 592 593 #ifdef DEBUG_SNPRINTF 594 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 595 zpadlen, spadlen, min, max, place); 596 #endif 597 598 /* Spaces */ 599 while (spadlen > 0) { 600 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 601 --spadlen; 602 } 603 604 /* Sign */ 605 if (signvalue) 606 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 607 608 /* Zeros */ 609 if (zpadlen > 0) { 610 while (zpadlen > 0) { 611 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 612 --zpadlen; 613 } 614 } 615 616 /* Digits */ 617 while (place > 0) { 618 --place; 619 DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]); 620 } 621 622 /* Left Justified spaces */ 623 while (spadlen < 0) { 624 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 625 ++spadlen; 626 } 627 return 0; 628 } 629 630 static LDOUBLE abs_val(LDOUBLE value) 631 { 632 LDOUBLE result = value; 633 634 if (value < 0) 635 result = -value; 636 637 return result; 638 } 639 640 static LDOUBLE POW10(int val) 641 { 642 LDOUBLE result = 1; 643 644 while (val) { 645 result *= 10; 646 val--; 647 } 648 649 return result; 650 } 651 652 static LLONG ROUND(LDOUBLE value) 653 { 654 LLONG intpart; 655 656 intpart = (LLONG)value; 657 value = value - intpart; 658 if (value >= 0.5) intpart++; 659 660 return intpart; 661 } 662 663 /* a replacement for modf that doesn't need the math library. Should 664 be portable, but slow */ 665 static double my_modf(double x0, double *iptr) 666 { 667 int i; 668 long l; 669 double x = x0; 670 double f = 1.0; 671 672 for (i=0;i<100;i++) { 673 l = (long)x; 674 if (l <= (x+1) && l >= (x-1)) break; 675 x *= 0.1; 676 f *= 10.0; 677 } 678 679 if (i == 100) { 680 /* 681 * yikes! the number is beyond what we can handle. 682 * What do we do? 683 */ 684 (*iptr) = 0; 685 return 0; 686 } 687 688 if (i != 0) { 689 double i2; 690 double ret; 691 692 ret = my_modf(x0-l*f, &i2); 693 (*iptr) = l*f + i2; 694 return ret; 695 } 696 697 (*iptr) = l; 698 return x - (*iptr); 699 } 700 701 702 static int 703 fmtfp (char *buffer, size_t *currlen, size_t maxlen, 704 LDOUBLE fvalue, int min, int max, int flags) 705 { 706 int signvalue = 0; 707 double ufvalue; 708 char iconvert[311]; 709 char fconvert[311]; 710 int iplace = 0; 711 int fplace = 0; 712 int padlen = 0; /* amount to pad */ 713 int zpadlen = 0; 714 int caps = 0; 715 int idx; 716 double intpart; 717 double fracpart; 718 double temp; 719 720 /* 721 * AIX manpage says the default is 0, but Solaris says the default 722 * is 6, and sprintf on AIX defaults to 6 723 */ 724 if (max < 0) 725 max = 6; 726 727 ufvalue = abs_val (fvalue); 728 729 if (fvalue < 0) { 730 signvalue = '-'; 731 } else { 732 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ 733 signvalue = '+'; 734 } else { 735 if (flags & DP_F_SPACE) 736 signvalue = ' '; 737 } 738 } 739 740 #if 0 741 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 742 #endif 743 744 #if 0 745 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ 746 #endif 747 748 /* 749 * Sorry, we only support 16 digits past the decimal because of our 750 * conversion method 751 */ 752 if (max > 16) 753 max = 16; 754 755 /* We "cheat" by converting the fractional part to integer by 756 * multiplying by a factor of 10 757 */ 758 759 temp = ufvalue; 760 my_modf(temp, &intpart); 761 762 fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); 763 764 if (fracpart >= POW10(max)) { 765 intpart++; 766 fracpart -= POW10(max); 767 } 768 769 /* Convert integer part */ 770 do { 771 temp = intpart*0.1; 772 my_modf(temp, &intpart); 773 idx = (int) ((temp -intpart +0.05)* 10.0); 774 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ 775 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ 776 iconvert[iplace++] = 777 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 778 } while (intpart && (iplace < 311)); 779 if (iplace == 311) iplace--; 780 iconvert[iplace] = 0; 781 782 /* Convert fractional part */ 783 if (fracpart) 784 { 785 do { 786 temp = fracpart*0.1; 787 my_modf(temp, &fracpart); 788 idx = (int) ((temp -fracpart +0.05)* 10.0); 789 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ 790 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ 791 fconvert[fplace++] = 792 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 793 } while(fracpart && (fplace < 311)); 794 if (fplace == 311) fplace--; 795 } 796 fconvert[fplace] = 0; 797 798 /* -1 for decimal point, another -1 if we are printing a sign */ 799 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 800 zpadlen = max - fplace; 801 if (zpadlen < 0) zpadlen = 0; 802 if (padlen < 0) 803 padlen = 0; 804 if (flags & DP_F_MINUS) 805 padlen = -padlen; /* Left Justifty */ 806 807 if ((flags & DP_F_ZERO) && (padlen > 0)) { 808 if (signvalue) { 809 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 810 --padlen; 811 signvalue = 0; 812 } 813 while (padlen > 0) { 814 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 815 --padlen; 816 } 817 } 818 while (padlen > 0) { 819 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 820 --padlen; 821 } 822 if (signvalue) 823 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 824 825 while (iplace > 0) { 826 --iplace; 827 DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]); 828 } 829 830 #ifdef DEBUG_SNPRINTF 831 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); 832 #endif 833 834 /* 835 * Decimal point. This should probably use locale to find the correct 836 * char to print out. 837 */ 838 if (max > 0) { 839 DOPR_OUTCH(buffer, *currlen, maxlen, '.'); 840 841 while (zpadlen > 0) { 842 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 843 --zpadlen; 844 } 845 846 while (fplace > 0) { 847 --fplace; 848 DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]); 849 } 850 } 851 852 while (padlen < 0) { 853 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 854 ++padlen; 855 } 856 return 0; 857 } 858 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ 859 860 #if !defined(HAVE_VSNPRINTF) 861 int 862 vsnprintf (char *str, size_t count, const char *fmt, va_list args) 863 { 864 return dopr(str, count, fmt, args); 865 } 866 #endif 867 868 #if !defined(HAVE_SNPRINTF) 869 int 870 snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) 871 { 872 size_t ret; 873 va_list ap; 874 875 va_start(ap, fmt); 876 ret = vsnprintf(str, count, fmt, ap); 877 va_end(ap); 878 return ret; 879 } 880 #endif 881
