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 * Damien Miller (djm@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 #define DP_C_SIZE 5 164 #define DP_C_INTMAX 6 165 166 #define char_to_int(p) ((p)- '0') 167 #ifndef MAX 168 # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) 169 #endif 170 171 #define DOPR_OUTCH(buf, pos, buflen, thechar) \ 172 do { \ 173 if (pos + 1 >= INT_MAX) { \ 174 errno = ERANGE; \ 175 return -1; \ 176 } \ 177 if (pos < buflen) \ 178 buf[pos] = thechar; \ 179 (pos)++; \ 180 } while (0) 181 182 static int dopr(char *buffer, size_t maxlen, const char *format, 183 va_list args_in); 184 static int fmtstr(char *buffer, size_t *currlen, size_t maxlen, 185 char *value, int flags, int min, int max); 186 static int fmtint(char *buffer, size_t *currlen, size_t maxlen, 187 intmax_t value, int base, int min, int max, int flags); 188 static int fmtfp(char *buffer, size_t *currlen, size_t maxlen, 189 LDOUBLE fvalue, int min, int max, int flags); 190 191 static int 192 dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) 193 { 194 char ch; 195 intmax_t value; 196 LDOUBLE fvalue; 197 char *strvalue; 198 int min; 199 int max; 200 int state; 201 int flags; 202 int cflags; 203 size_t currlen; 204 va_list args; 205 206 VA_COPY(args, args_in); 207 208 state = DP_S_DEFAULT; 209 currlen = flags = cflags = min = 0; 210 max = -1; 211 ch = *format++; 212 213 while (state != DP_S_DONE) { 214 if (ch == '\0') 215 state = DP_S_DONE; 216 217 switch(state) { 218 case DP_S_DEFAULT: 219 if (ch == '%') 220 state = DP_S_FLAGS; 221 else 222 DOPR_OUTCH(buffer, currlen, maxlen, ch); 223 ch = *format++; 224 break; 225 case DP_S_FLAGS: 226 switch (ch) { 227 case '-': 228 flags |= DP_F_MINUS; 229 ch = *format++; 230 break; 231 case '+': 232 flags |= DP_F_PLUS; 233 ch = *format++; 234 break; 235 case ' ': 236 flags |= DP_F_SPACE; 237 ch = *format++; 238 break; 239 case '#': 240 flags |= DP_F_NUM; 241 ch = *format++; 242 break; 243 case '0': 244 flags |= DP_F_ZERO; 245 ch = *format++; 246 break; 247 default: 248 state = DP_S_MIN; 249 break; 250 } 251 break; 252 case DP_S_MIN: 253 if (isdigit((unsigned char)ch)) { 254 min = 10*min + char_to_int (ch); 255 ch = *format++; 256 } else if (ch == '*') { 257 min = va_arg (args, int); 258 ch = *format++; 259 state = DP_S_DOT; 260 } else { 261 state = DP_S_DOT; 262 } 263 break; 264 case DP_S_DOT: 265 if (ch == '.') { 266 state = DP_S_MAX; 267 ch = *format++; 268 } else { 269 state = DP_S_MOD; 270 } 271 break; 272 case DP_S_MAX: 273 if (isdigit((unsigned char)ch)) { 274 if (max < 0) 275 max = 0; 276 max = 10*max + char_to_int (ch); 277 ch = *format++; 278 } else if (ch == '*') { 279 max = va_arg (args, int); 280 ch = *format++; 281 state = DP_S_MOD; 282 } else { 283 state = DP_S_MOD; 284 } 285 break; 286 case DP_S_MOD: 287 switch (ch) { 288 case 'h': 289 cflags = DP_C_SHORT; 290 ch = *format++; 291 break; 292 case 'j': 293 cflags = DP_C_INTMAX; 294 ch = *format++; 295 break; 296 case 'l': 297 cflags = DP_C_LONG; 298 ch = *format++; 299 if (ch == 'l') { /* It's a long long */ 300 cflags = DP_C_LLONG; 301 ch = *format++; 302 } 303 break; 304 case 'L': 305 cflags = DP_C_LDOUBLE; 306 ch = *format++; 307 break; 308 case 'z': 309 cflags = DP_C_SIZE; 310 ch = *format++; 311 break; 312 default: 313 break; 314 } 315 state = DP_S_CONV; 316 break; 317 case DP_S_CONV: 318 switch (ch) { 319 case 'd': 320 case 'i': 321 if (cflags == DP_C_SHORT) 322 value = va_arg (args, int); 323 else if (cflags == DP_C_LONG) 324 value = va_arg (args, long int); 325 else if (cflags == DP_C_LLONG) 326 value = va_arg (args, LLONG); 327 else if (cflags == DP_C_SIZE) 328 value = va_arg (args, ssize_t); 329 else if (cflags == DP_C_INTMAX) 330 value = va_arg (args, intmax_t); 331 else 332 value = va_arg (args, int); 333 if (fmtint(buffer, &currlen, maxlen, 334 value, 10, min, max, flags) == -1) 335 return -1; 336 break; 337 case 'o': 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 = (long)va_arg (args, unsigned LLONG); 345 else if (cflags == DP_C_SIZE) 346 value = va_arg (args, size_t); 347 #ifdef notyet 348 else if (cflags == DP_C_INTMAX) 349 value = va_arg (args, uintmax_t); 350 #endif 351 else 352 value = (long)va_arg (args, unsigned int); 353 if (fmtint(buffer, &currlen, maxlen, value, 354 8, min, max, flags) == -1) 355 return -1; 356 break; 357 case 'u': 358 flags |= DP_F_UNSIGNED; 359 if (cflags == DP_C_SHORT) 360 value = va_arg (args, unsigned int); 361 else if (cflags == DP_C_LONG) 362 value = (long)va_arg (args, unsigned long int); 363 else if (cflags == DP_C_LLONG) 364 value = (LLONG)va_arg (args, unsigned LLONG); 365 else if (cflags == DP_C_SIZE) 366 value = va_arg (args, size_t); 367 #ifdef notyet 368 else if (cflags == DP_C_INTMAX) 369 value = va_arg (args, uintmax_t); 370 #endif 371 else 372 value = (long)va_arg (args, unsigned int); 373 if (fmtint(buffer, &currlen, maxlen, value, 374 10, min, max, flags) == -1) 375 return -1; 376 break; 377 case 'X': 378 flags |= DP_F_UP; 379 case 'x': 380 flags |= DP_F_UNSIGNED; 381 if (cflags == DP_C_SHORT) 382 value = va_arg (args, unsigned int); 383 else if (cflags == DP_C_LONG) 384 value = (long)va_arg (args, unsigned long int); 385 else if (cflags == DP_C_LLONG) 386 value = (LLONG)va_arg (args, unsigned LLONG); 387 else if (cflags == DP_C_SIZE) 388 value = va_arg (args, size_t); 389 #ifdef notyet 390 else if (cflags == DP_C_INTMAX) 391 value = va_arg (args, uintmax_t); 392 #endif 393 else 394 value = (long)va_arg (args, unsigned int); 395 if (fmtint(buffer, &currlen, maxlen, value, 396 16, min, max, flags) == -1) 397 return -1; 398 break; 399 case 'f': 400 if (cflags == DP_C_LDOUBLE) 401 fvalue = va_arg (args, LDOUBLE); 402 else 403 fvalue = va_arg (args, double); 404 if (fmtfp(buffer, &currlen, maxlen, fvalue, 405 min, max, flags) == -1) 406 return -1; 407 break; 408 case 'E': 409 flags |= DP_F_UP; 410 case 'e': 411 if (cflags == DP_C_LDOUBLE) 412 fvalue = va_arg (args, LDOUBLE); 413 else 414 fvalue = va_arg (args, double); 415 if (fmtfp(buffer, &currlen, maxlen, fvalue, 416 min, max, flags) == -1) 417 return -1; 418 break; 419 case 'G': 420 flags |= DP_F_UP; 421 case 'g': 422 if (cflags == DP_C_LDOUBLE) 423 fvalue = va_arg (args, LDOUBLE); 424 else 425 fvalue = va_arg (args, double); 426 if (fmtfp(buffer, &currlen, maxlen, fvalue, 427 min, max, flags) == -1) 428 return -1; 429 break; 430 case 'c': 431 DOPR_OUTCH(buffer, currlen, maxlen, 432 va_arg (args, int)); 433 break; 434 case 's': 435 strvalue = va_arg (args, char *); 436 if (!strvalue) strvalue = "(NULL)"; 437 if (max == -1) { 438 max = strlen(strvalue); 439 } 440 if (min > 0 && max >= 0 && min > max) max = min; 441 if (fmtstr(buffer, &currlen, maxlen, 442 strvalue, flags, min, max) == -1) 443 return -1; 444 break; 445 case 'p': 446 strvalue = va_arg (args, void *); 447 if (fmtint(buffer, &currlen, maxlen, 448 (long) strvalue, 16, min, max, flags) == -1) 449 return -1; 450 break; 451 #if we_dont_want_this_in_openssh 452 case 'n': 453 if (cflags == DP_C_SHORT) { 454 short int *num; 455 num = va_arg (args, short int *); 456 *num = currlen; 457 } else if (cflags == DP_C_LONG) { 458 long int *num; 459 num = va_arg (args, long int *); 460 *num = (long int)currlen; 461 } else if (cflags == DP_C_LLONG) { 462 LLONG *num; 463 num = va_arg (args, LLONG *); 464 *num = (LLONG)currlen; 465 } else if (cflags == DP_C_SIZE) { 466 ssize_t *num; 467 num = va_arg (args, ssize_t *); 468 *num = (ssize_t)currlen; 469 } else if (cflags == DP_C_INTMAX) { 470 intmax_t *num; 471 num = va_arg (args, intmax_t *); 472 *num = (intmax_t)currlen; 473 } else { 474 int *num; 475 num = va_arg (args, int *); 476 *num = currlen; 477 } 478 break; 479 #endif 480 case '%': 481 DOPR_OUTCH(buffer, currlen, maxlen, ch); 482 break; 483 case 'w': 484 /* not supported yet, treat as next char */ 485 ch = *format++; 486 break; 487 default: 488 /* Unknown, skip */ 489 break; 490 } 491 ch = *format++; 492 state = DP_S_DEFAULT; 493 flags = cflags = min = 0; 494 max = -1; 495 break; 496 case DP_S_DONE: 497 break; 498 default: 499 /* hmm? */ 500 break; /* some picky compilers need this */ 501 } 502 } 503 if (maxlen != 0) { 504 if (currlen < maxlen - 1) 505 buffer[currlen] = '\0'; 506 else if (maxlen > 0) 507 buffer[maxlen - 1] = '\0'; 508 } 509 510 return currlen < INT_MAX ? (int)currlen : -1; 511 } 512 513 static int 514 fmtstr(char *buffer, size_t *currlen, size_t maxlen, 515 char *value, int flags, int min, int max) 516 { 517 int padlen, strln; /* amount to pad */ 518 int cnt = 0; 519 520 #ifdef DEBUG_SNPRINTF 521 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); 522 #endif 523 if (value == 0) { 524 value = "<NULL>"; 525 } 526 527 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ 528 padlen = min - strln; 529 if (padlen < 0) 530 padlen = 0; 531 if (flags & DP_F_MINUS) 532 padlen = -padlen; /* Left Justify */ 533 534 while ((padlen > 0) && (cnt < max)) { 535 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 536 --padlen; 537 ++cnt; 538 } 539 while (*value && (cnt < max)) { 540 DOPR_OUTCH(buffer, *currlen, maxlen, *value); 541 value++; 542 ++cnt; 543 } 544 while ((padlen < 0) && (cnt < max)) { 545 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 546 ++padlen; 547 ++cnt; 548 } 549 return 0; 550 } 551 552 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ 553 554 static int 555 fmtint(char *buffer, size_t *currlen, size_t maxlen, 556 intmax_t value, int base, int min, int max, int flags) 557 { 558 int signvalue = 0; 559 unsigned LLONG uvalue; 560 char convert[20]; 561 int place = 0; 562 int spadlen = 0; /* amount to space pad */ 563 int zpadlen = 0; /* amount to zero pad */ 564 int caps = 0; 565 566 if (max < 0) 567 max = 0; 568 569 uvalue = value; 570 571 if(!(flags & DP_F_UNSIGNED)) { 572 if( value < 0 ) { 573 signvalue = '-'; 574 uvalue = -value; 575 } else { 576 if (flags & DP_F_PLUS) /* Do a sign (+/i) */ 577 signvalue = '+'; 578 else if (flags & DP_F_SPACE) 579 signvalue = ' '; 580 } 581 } 582 583 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 584 585 do { 586 convert[place++] = 587 (caps? "0123456789ABCDEF":"0123456789abcdef") 588 [uvalue % (unsigned)base ]; 589 uvalue = (uvalue / (unsigned)base ); 590 } while(uvalue && (place < 20)); 591 if (place == 20) place--; 592 convert[place] = 0; 593 594 zpadlen = max - place; 595 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); 596 if (zpadlen < 0) zpadlen = 0; 597 if (spadlen < 0) spadlen = 0; 598 if (flags & DP_F_ZERO) { 599 zpadlen = MAX(zpadlen, spadlen); 600 spadlen = 0; 601 } 602 if (flags & DP_F_MINUS) 603 spadlen = -spadlen; /* Left Justifty */ 604 605 #ifdef DEBUG_SNPRINTF 606 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", 607 zpadlen, spadlen, min, max, place); 608 #endif 609 610 /* Spaces */ 611 while (spadlen > 0) { 612 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 613 --spadlen; 614 } 615 616 /* Sign */ 617 if (signvalue) 618 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 619 620 /* Zeros */ 621 if (zpadlen > 0) { 622 while (zpadlen > 0) { 623 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 624 --zpadlen; 625 } 626 } 627 628 /* Digits */ 629 while (place > 0) { 630 --place; 631 DOPR_OUTCH(buffer, *currlen, maxlen, convert[place]); 632 } 633 634 /* Left Justified spaces */ 635 while (spadlen < 0) { 636 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 637 ++spadlen; 638 } 639 return 0; 640 } 641 642 static LDOUBLE abs_val(LDOUBLE value) 643 { 644 LDOUBLE result = value; 645 646 if (value < 0) 647 result = -value; 648 649 return result; 650 } 651 652 static LDOUBLE POW10(int val) 653 { 654 LDOUBLE result = 1; 655 656 while (val) { 657 result *= 10; 658 val--; 659 } 660 661 return result; 662 } 663 664 static LLONG ROUND(LDOUBLE value) 665 { 666 LLONG intpart; 667 668 intpart = (LLONG)value; 669 value = value - intpart; 670 if (value >= 0.5) intpart++; 671 672 return intpart; 673 } 674 675 /* a replacement for modf that doesn't need the math library. Should 676 be portable, but slow */ 677 static double my_modf(double x0, double *iptr) 678 { 679 int i; 680 long l; 681 double x = x0; 682 double f = 1.0; 683 684 for (i=0;i<100;i++) { 685 l = (long)x; 686 if (l <= (x+1) && l >= (x-1)) break; 687 x *= 0.1; 688 f *= 10.0; 689 } 690 691 if (i == 100) { 692 /* 693 * yikes! the number is beyond what we can handle. 694 * What do we do? 695 */ 696 (*iptr) = 0; 697 return 0; 698 } 699 700 if (i != 0) { 701 double i2; 702 double ret; 703 704 ret = my_modf(x0-l*f, &i2); 705 (*iptr) = l*f + i2; 706 return ret; 707 } 708 709 (*iptr) = l; 710 return x - (*iptr); 711 } 712 713 714 static int 715 fmtfp (char *buffer, size_t *currlen, size_t maxlen, 716 LDOUBLE fvalue, int min, int max, int flags) 717 { 718 int signvalue = 0; 719 double ufvalue; 720 char iconvert[311]; 721 char fconvert[311]; 722 int iplace = 0; 723 int fplace = 0; 724 int padlen = 0; /* amount to pad */ 725 int zpadlen = 0; 726 int caps = 0; 727 int idx; 728 double intpart; 729 double fracpart; 730 double temp; 731 732 /* 733 * AIX manpage says the default is 0, but Solaris says the default 734 * is 6, and sprintf on AIX defaults to 6 735 */ 736 if (max < 0) 737 max = 6; 738 739 ufvalue = abs_val (fvalue); 740 741 if (fvalue < 0) { 742 signvalue = '-'; 743 } else { 744 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ 745 signvalue = '+'; 746 } else { 747 if (flags & DP_F_SPACE) 748 signvalue = ' '; 749 } 750 } 751 752 #if 0 753 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ 754 #endif 755 756 #if 0 757 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ 758 #endif 759 760 /* 761 * Sorry, we only support 16 digits past the decimal because of our 762 * conversion method 763 */ 764 if (max > 16) 765 max = 16; 766 767 /* We "cheat" by converting the fractional part to integer by 768 * multiplying by a factor of 10 769 */ 770 771 temp = ufvalue; 772 my_modf(temp, &intpart); 773 774 fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); 775 776 if (fracpart >= POW10(max)) { 777 intpart++; 778 fracpart -= POW10(max); 779 } 780 781 /* Convert integer part */ 782 do { 783 temp = intpart*0.1; 784 my_modf(temp, &intpart); 785 idx = (int) ((temp -intpart +0.05)* 10.0); 786 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ 787 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ 788 iconvert[iplace++] = 789 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 790 } while (intpart && (iplace < 311)); 791 if (iplace == 311) iplace--; 792 iconvert[iplace] = 0; 793 794 /* Convert fractional part */ 795 if (fracpart) 796 { 797 do { 798 temp = fracpart*0.1; 799 my_modf(temp, &fracpart); 800 idx = (int) ((temp -fracpart +0.05)* 10.0); 801 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ 802 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ 803 fconvert[fplace++] = 804 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; 805 } while(fracpart && (fplace < 311)); 806 if (fplace == 311) fplace--; 807 } 808 fconvert[fplace] = 0; 809 810 /* -1 for decimal point, another -1 if we are printing a sign */ 811 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 812 zpadlen = max - fplace; 813 if (zpadlen < 0) zpadlen = 0; 814 if (padlen < 0) 815 padlen = 0; 816 if (flags & DP_F_MINUS) 817 padlen = -padlen; /* Left Justifty */ 818 819 if ((flags & DP_F_ZERO) && (padlen > 0)) { 820 if (signvalue) { 821 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 822 --padlen; 823 signvalue = 0; 824 } 825 while (padlen > 0) { 826 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 827 --padlen; 828 } 829 } 830 while (padlen > 0) { 831 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 832 --padlen; 833 } 834 if (signvalue) 835 DOPR_OUTCH(buffer, *currlen, maxlen, signvalue); 836 837 while (iplace > 0) { 838 --iplace; 839 DOPR_OUTCH(buffer, *currlen, maxlen, iconvert[iplace]); 840 } 841 842 #ifdef DEBUG_SNPRINTF 843 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); 844 #endif 845 846 /* 847 * Decimal point. This should probably use locale to find the correct 848 * char to print out. 849 */ 850 if (max > 0) { 851 DOPR_OUTCH(buffer, *currlen, maxlen, '.'); 852 853 while (zpadlen > 0) { 854 DOPR_OUTCH(buffer, *currlen, maxlen, '0'); 855 --zpadlen; 856 } 857 858 while (fplace > 0) { 859 --fplace; 860 DOPR_OUTCH(buffer, *currlen, maxlen, fconvert[fplace]); 861 } 862 } 863 864 while (padlen < 0) { 865 DOPR_OUTCH(buffer, *currlen, maxlen, ' '); 866 ++padlen; 867 } 868 return 0; 869 } 870 #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ 871 872 #if !defined(HAVE_VSNPRINTF) 873 int 874 vsnprintf (char *str, size_t count, const char *fmt, va_list args) 875 { 876 return dopr(str, count, fmt, args); 877 } 878 #endif 879 880 #if !defined(HAVE_SNPRINTF) 881 int 882 snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) 883 { 884 size_t ret; 885 va_list ap; 886 887 va_start(ap, fmt); 888 ret = vsnprintf(str, count, fmt, ap); 889 va_end(ap); 890 return ret; 891 } 892 #endif 893