1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93"; 39 #endif /* LIBC_SCCS and not lint */ 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include "namespace.h" 44 #include <ctype.h> 45 #include <inttypes.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <stddef.h> 49 #if __STDC__ 50 #include <stdarg.h> 51 #else 52 #include <varargs.h> 53 #endif 54 #include <string.h> 55 #include "un-namespace.h" 56 57 #include "collate.h" 58 #include "libc_private.h" 59 #include "local.h" 60 61 #define FLOATING_POINT 62 63 #ifdef FLOATING_POINT 64 #include <locale.h> 65 #include "floatio.h" 66 #endif 67 68 #define BUF 513 /* Maximum length of numeric string. */ 69 70 /* 71 * Flags used during conversion. 72 */ 73 #define LONG 0x01 /* l: long or double */ 74 #define LONGDBL 0x02 /* L: long double */ 75 #define SHORT 0x04 /* h: short */ 76 #define SUPPRESS 0x08 /* *: suppress assignment */ 77 #define POINTER 0x10 /* p: void * (as hex) */ 78 #define NOSKIP 0x20 /* [ or c: do not skip blanks */ 79 #define LONGLONG 0x400 /* ll: long long (+ deprecated q: quad) */ 80 #define INTMAXT 0x800 /* j: intmax_t */ 81 #define PTRDIFFT 0x1000 /* t: ptrdiff_t */ 82 #define SIZET 0x2000 /* z: size_t */ 83 #define SHORTSHORT 0x4000 /* hh: char */ 84 #define UNSIGNED 0x8000 /* %[oupxX] conversions */ 85 86 /* 87 * The following are used in numeric conversions only: 88 * SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point; 89 * SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral. 90 */ 91 #define SIGNOK 0x40 /* +/- is (still) legal */ 92 #define NDIGITS 0x80 /* no digits detected */ 93 94 #define DPTOK 0x100 /* (float) decimal point is still legal */ 95 #define EXPOK 0x200 /* (float) exponent (e+3, etc) still legal */ 96 97 #define PFXOK 0x100 /* 0x prefix is (still) legal */ 98 #define NZDIGITS 0x200 /* no zero digits detected */ 99 100 /* 101 * Conversion types. 102 */ 103 #define CT_CHAR 0 /* %c conversion */ 104 #define CT_CCL 1 /* %[...] conversion */ 105 #define CT_STRING 2 /* %s conversion */ 106 #define CT_INT 3 /* %[dioupxX] conversion */ 107 #define CT_FLOAT 4 /* %[efgEFG] conversion */ 108 109 static const u_char *__sccl(char *, const u_char *); 110 111 /* 112 * __vfscanf - MT-safe version 113 */ 114 int 115 __vfscanf(FILE *fp, char const *fmt0, va_list ap) 116 { 117 int ret; 118 119 FLOCKFILE(fp); 120 ret = __svfscanf(fp, fmt0, ap); 121 FUNLOCKFILE(fp); 122 return (ret); 123 } 124 125 /* 126 * __svfscanf - non-MT-safe version of __vfscanf 127 */ 128 int 129 __svfscanf(FILE *fp, const char *fmt0, va_list ap) 130 { 131 const u_char *fmt = (const u_char *)fmt0; 132 int c; /* character from format, or conversion */ 133 size_t width; /* field width, or 0 */ 134 char *p; /* points into all kinds of strings */ 135 int n; /* handy integer */ 136 int flags; /* flags as defined above */ 137 char *p0; /* saves original value of p when necessary */ 138 int nassigned; /* number of fields assigned */ 139 int nconversions; /* number of conversions */ 140 int nread; /* number of characters consumed from fp */ 141 int base; /* base argument to conversion function */ 142 char ccltab[256]; /* character class table for %[...] */ 143 char buf[BUF]; /* buffer for numeric conversions */ 144 145 /* `basefix' is used to avoid `if' tests in the integer scanner */ 146 static short basefix[17] = 147 { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; 148 #ifdef FLOATING_POINT 149 char decimal_point = localeconv()->decimal_point[0]; 150 #endif 151 152 nassigned = 0; 153 nconversions = 0; 154 nread = 0; 155 for (;;) { 156 c = *fmt++; 157 if (c == 0) 158 return (nassigned); 159 if (isspace(c)) { 160 while ((fp->_r > 0 || __srefill(fp) == 0) && isspace(*fp->_p)) 161 nread++, fp->_r--, fp->_p++; 162 continue; 163 } 164 if (c != '%') 165 goto literal; 166 width = 0; 167 flags = 0; 168 /* 169 * switch on the format. continue if done; 170 * break once format type is derived. 171 */ 172 again: c = *fmt++; 173 switch (c) { 174 case '%': 175 literal: 176 if (fp->_r <= 0 && __srefill(fp)) 177 goto input_failure; 178 if (*fp->_p != c) 179 goto match_failure; 180 fp->_r--, fp->_p++; 181 nread++; 182 continue; 183 184 case '*': 185 flags |= SUPPRESS; 186 goto again; 187 case 'j': 188 flags |= INTMAXT; 189 goto again; 190 case 'l': 191 if (flags & LONG) { 192 flags &= ~LONG; 193 flags |= LONGLONG; 194 } else 195 flags |= LONG; 196 goto again; 197 case 'q': 198 flags |= LONGLONG; /* not quite */ 199 goto again; 200 case 't': 201 flags |= PTRDIFFT; 202 goto again; 203 case 'z': 204 flags |= SIZET; 205 goto again; 206 case 'L': 207 flags |= LONGDBL; 208 goto again; 209 case 'h': 210 if (flags & SHORT) { 211 flags &= ~SHORT; 212 flags |= SHORTSHORT; 213 } else 214 flags |= SHORT; 215 goto again; 216 217 case '0': case '1': case '2': case '3': case '4': 218 case '5': case '6': case '7': case '8': case '9': 219 width = width * 10 + c - '0'; 220 goto again; 221 222 /* 223 * Conversions. 224 */ 225 case 'd': 226 c = CT_INT; 227 base = 10; 228 break; 229 230 case 'i': 231 c = CT_INT; 232 base = 0; 233 break; 234 235 case 'o': 236 c = CT_INT; 237 flags |= UNSIGNED; 238 base = 8; 239 break; 240 241 case 'u': 242 c = CT_INT; 243 flags |= UNSIGNED; 244 base = 10; 245 break; 246 247 case 'X': 248 case 'x': 249 flags |= PFXOK; /* enable 0x prefixing */ 250 c = CT_INT; 251 flags |= UNSIGNED; 252 base = 16; 253 break; 254 255 #ifdef FLOATING_POINT 256 case 'E': case 'F': case 'G': 257 case 'e': case 'f': case 'g': 258 c = CT_FLOAT; 259 break; 260 #endif 261 262 case 'S': 263 flags |= LONG; 264 /* FALLTHROUGH */ 265 case 's': 266 c = CT_STRING; 267 break; 268 269 case '[': 270 fmt = __sccl(ccltab, fmt); 271 flags |= NOSKIP; 272 c = CT_CCL; 273 break; 274 275 case 'C': 276 flags |= LONG; 277 /* FALLTHROUGH */ 278 case 'c': 279 flags |= NOSKIP; 280 c = CT_CHAR; 281 break; 282 283 case 'p': /* pointer format is like hex */ 284 flags |= POINTER | PFXOK; 285 c = CT_INT; /* assumes sizeof(uintmax_t) */ 286 flags |= UNSIGNED; /* >= sizeof(uintptr_t) */ 287 base = 16; 288 break; 289 290 case 'n': 291 nconversions++; 292 if (flags & SUPPRESS) /* ??? */ 293 continue; 294 if (flags & SHORTSHORT) 295 *va_arg(ap, char *) = nread; 296 else if (flags & SHORT) 297 *va_arg(ap, short *) = nread; 298 else if (flags & LONG) 299 *va_arg(ap, long *) = nread; 300 else if (flags & LONGLONG) 301 *va_arg(ap, long long *) = nread; 302 else if (flags & INTMAXT) 303 *va_arg(ap, intmax_t *) = nread; 304 else if (flags & SIZET) 305 *va_arg(ap, size_t *) = nread; 306 else if (flags & PTRDIFFT) 307 *va_arg(ap, ptrdiff_t *) = nread; 308 else 309 *va_arg(ap, int *) = nread; 310 continue; 311 312 default: 313 goto match_failure; 314 315 /* 316 * Disgusting backwards compatibility hack. XXX 317 */ 318 case '\0': /* compat */ 319 return (EOF); 320 } 321 322 /* 323 * We have a conversion that requires input. 324 */ 325 if (fp->_r <= 0 && __srefill(fp)) 326 goto input_failure; 327 328 /* 329 * Consume leading white space, except for formats 330 * that suppress this. 331 */ 332 if ((flags & NOSKIP) == 0) { 333 while (isspace(*fp->_p)) { 334 nread++; 335 if (--fp->_r > 0) 336 fp->_p++; 337 else if (__srefill(fp)) 338 goto input_failure; 339 } 340 /* 341 * Note that there is at least one character in 342 * the buffer, so conversions that do not set NOSKIP 343 * ca no longer result in an input failure. 344 */ 345 } 346 347 /* 348 * Do the conversion. 349 */ 350 switch (c) { 351 352 case CT_CHAR: 353 /* scan arbitrary characters (sets NOSKIP) */ 354 if (width == 0) 355 width = 1; 356 if (flags & SUPPRESS) { 357 size_t sum = 0; 358 for (;;) { 359 if ((n = fp->_r) < width) { 360 sum += n; 361 width -= n; 362 fp->_p += n; 363 if (__srefill(fp)) { 364 if (sum == 0) 365 goto input_failure; 366 break; 367 } 368 } else { 369 sum += width; 370 fp->_r -= width; 371 fp->_p += width; 372 break; 373 } 374 } 375 nread += sum; 376 } else { 377 size_t r = fread((void *)va_arg(ap, char *), 1, 378 width, fp); 379 380 if (r == 0) 381 goto input_failure; 382 nread += r; 383 nassigned++; 384 } 385 nconversions++; 386 break; 387 388 case CT_CCL: 389 /* scan a (nonempty) character class (sets NOSKIP) */ 390 if (width == 0) 391 width = (size_t)~0; /* `infinity' */ 392 /* take only those things in the class */ 393 if (flags & SUPPRESS) { 394 n = 0; 395 while (ccltab[*fp->_p]) { 396 n++, fp->_r--, fp->_p++; 397 if (--width == 0) 398 break; 399 if (fp->_r <= 0 && __srefill(fp)) { 400 if (n == 0) 401 goto input_failure; 402 break; 403 } 404 } 405 if (n == 0) 406 goto match_failure; 407 } else { 408 p0 = p = va_arg(ap, char *); 409 while (ccltab[*fp->_p]) { 410 fp->_r--; 411 *p++ = *fp->_p++; 412 if (--width == 0) 413 break; 414 if (fp->_r <= 0 && __srefill(fp)) { 415 if (p == p0) 416 goto input_failure; 417 break; 418 } 419 } 420 n = p - p0; 421 if (n == 0) 422 goto match_failure; 423 *p = 0; 424 nassigned++; 425 } 426 nread += n; 427 nconversions++; 428 break; 429 430 case CT_STRING: 431 /* like CCL, but zero-length string OK, & no NOSKIP */ 432 if (width == 0) 433 width = (size_t)~0; 434 if (flags & SUPPRESS) { 435 n = 0; 436 while (!isspace(*fp->_p)) { 437 n++, fp->_r--, fp->_p++; 438 if (--width == 0) 439 break; 440 if (fp->_r <= 0 && __srefill(fp)) 441 break; 442 } 443 nread += n; 444 } else { 445 p0 = p = va_arg(ap, char *); 446 while (!isspace(*fp->_p)) { 447 fp->_r--; 448 *p++ = *fp->_p++; 449 if (--width == 0) 450 break; 451 if (fp->_r <= 0 && __srefill(fp)) 452 break; 453 } 454 *p = 0; 455 nread += p - p0; 456 nassigned++; 457 } 458 nconversions++; 459 continue; 460 461 case CT_INT: 462 /* scan an integer as if by the conversion function */ 463 #ifdef hardway 464 if (width == 0 || width > sizeof(buf) - 1) 465 width = sizeof(buf) - 1; 466 #else 467 /* size_t is unsigned, hence this optimisation */ 468 if (--width > sizeof(buf) - 2) 469 width = sizeof(buf) - 2; 470 width++; 471 #endif 472 flags |= SIGNOK | NDIGITS | NZDIGITS; 473 for (p = buf; width; width--) { 474 c = *fp->_p; 475 /* 476 * Switch on the character; `goto ok' 477 * if we accept it as a part of number. 478 */ 479 switch (c) { 480 481 /* 482 * The digit 0 is always legal, but is 483 * special. For %i conversions, if no 484 * digits (zero or nonzero) have been 485 * scanned (only signs), we will have 486 * base==0. In that case, we should set 487 * it to 8 and enable 0x prefixing. 488 * Also, if we have not scanned zero digits 489 * before this, do not turn off prefixing 490 * (someone else will turn it off if we 491 * have scanned any nonzero digits). 492 */ 493 case '0': 494 if (base == 0) { 495 base = 8; 496 flags |= PFXOK; 497 } 498 if (flags & NZDIGITS) 499 flags &= ~(SIGNOK|NZDIGITS|NDIGITS); 500 else 501 flags &= ~(SIGNOK|PFXOK|NDIGITS); 502 goto ok; 503 504 /* 1 through 7 always legal */ 505 case '1': case '2': case '3': 506 case '4': case '5': case '6': case '7': 507 base = basefix[base]; 508 flags &= ~(SIGNOK | PFXOK | NDIGITS); 509 goto ok; 510 511 /* digits 8 and 9 ok iff decimal or hex */ 512 case '8': case '9': 513 base = basefix[base]; 514 if (base <= 8) 515 break; /* not legal here */ 516 flags &= ~(SIGNOK | PFXOK | NDIGITS); 517 goto ok; 518 519 /* letters ok iff hex */ 520 case 'A': case 'B': case 'C': 521 case 'D': case 'E': case 'F': 522 case 'a': case 'b': case 'c': 523 case 'd': case 'e': case 'f': 524 /* no need to fix base here */ 525 if (base <= 10) 526 break; /* not legal here */ 527 flags &= ~(SIGNOK | PFXOK | NDIGITS); 528 goto ok; 529 530 /* sign ok only as first character */ 531 case '+': case '-': 532 if (flags & SIGNOK) { 533 flags &= ~SIGNOK; 534 goto ok; 535 } 536 break; 537 538 /* x ok iff flag still set & 2nd char */ 539 case 'x': case 'X': 540 if (flags & PFXOK && p == buf + 1) { 541 base = 16; /* if %i */ 542 flags &= ~PFXOK; 543 goto ok; 544 } 545 break; 546 } 547 548 /* 549 * If we got here, c is not a legal character 550 * for a number. Stop accumulating digits. 551 */ 552 break; 553 ok: 554 /* 555 * c is legal: store it and look at the next. 556 */ 557 *p++ = c; 558 if (--fp->_r > 0) 559 fp->_p++; 560 else if (__srefill(fp)) 561 break; /* EOF */ 562 } 563 /* 564 * If we had only a sign, it is no good; push 565 * back the sign. If the number ends in `x', 566 * it was [sign] '0' 'x', so push back the x 567 * and treat it as [sign] '0'. 568 */ 569 if (flags & NDIGITS) { 570 if (p > buf) 571 (void) __ungetc(*(u_char *)--p, fp); 572 goto match_failure; 573 } 574 c = ((u_char *)p)[-1]; 575 if (c == 'x' || c == 'X') { 576 --p; 577 (void) __ungetc(c, fp); 578 } 579 if ((flags & SUPPRESS) == 0) { 580 uintmax_t res; 581 582 *p = 0; 583 if ((flags & UNSIGNED) == 0) 584 res = strtoimax(buf, (char **)NULL, base); 585 else 586 res = strtoumax(buf, (char **)NULL, base); 587 if (flags & POINTER) 588 *va_arg(ap, void **) = 589 (void *)(uintptr_t)res; 590 else if (flags & SHORTSHORT) 591 *va_arg(ap, char *) = res; 592 else if (flags & SHORT) 593 *va_arg(ap, short *) = res; 594 else if (flags & LONG) 595 *va_arg(ap, long *) = res; 596 else if (flags & LONGLONG) 597 *va_arg(ap, long long *) = res; 598 else if (flags & INTMAXT) 599 *va_arg(ap, intmax_t *) = res; 600 else if (flags & PTRDIFFT) 601 *va_arg(ap, ptrdiff_t *) = res; 602 else if (flags & SIZET) 603 *va_arg(ap, size_t *) = res; 604 else 605 *va_arg(ap, int *) = res; 606 nassigned++; 607 } 608 nread += p - buf; 609 nconversions++; 610 break; 611 612 #ifdef FLOATING_POINT 613 case CT_FLOAT: 614 /* scan a floating point number as if by strtod */ 615 #ifdef hardway 616 if (width == 0 || width > sizeof(buf) - 1) 617 width = sizeof(buf) - 1; 618 #else 619 /* size_t is unsigned, hence this optimisation */ 620 if (--width > sizeof(buf) - 2) 621 width = sizeof(buf) - 2; 622 width++; 623 #endif 624 flags |= SIGNOK | NDIGITS | DPTOK | EXPOK; 625 for (p = buf; width; width--) { 626 c = *fp->_p; 627 /* 628 * This code mimicks the integer conversion 629 * code, but is much simpler. 630 */ 631 switch (c) { 632 633 case '0': case '1': case '2': case '3': 634 case '4': case '5': case '6': case '7': 635 case '8': case '9': 636 flags &= ~(SIGNOK | NDIGITS); 637 goto fok; 638 639 case '+': case '-': 640 if (flags & SIGNOK) { 641 flags &= ~SIGNOK; 642 goto fok; 643 } 644 break; 645 case 'e': case 'E': 646 /* no exponent without some digits */ 647 if ((flags&(NDIGITS|EXPOK)) == EXPOK) { 648 flags = 649 (flags & ~(EXPOK|DPTOK)) | 650 SIGNOK | NDIGITS; 651 goto fok; 652 } 653 break; 654 default: 655 if ((char)c == decimal_point && 656 (flags & DPTOK)) { 657 flags &= ~(SIGNOK | DPTOK); 658 goto fok; 659 } 660 break; 661 } 662 break; 663 fok: 664 *p++ = c; 665 if (--fp->_r > 0) 666 fp->_p++; 667 else if (__srefill(fp)) 668 break; /* EOF */ 669 } 670 /* 671 * If no digits, might be missing exponent digits 672 * (just give back the exponent) or might be missing 673 * regular digits, but had sign and/or decimal point. 674 */ 675 if (flags & NDIGITS) { 676 if (flags & EXPOK) { 677 /* no digits at all */ 678 while (p > buf) 679 __ungetc(*(u_char *)--p, fp); 680 goto match_failure; 681 } 682 /* just a bad exponent (e and maybe sign) */ 683 c = *(u_char *)--p; 684 if (c != 'e' && c != 'E') { 685 (void) __ungetc(c, fp);/* sign */ 686 c = *(u_char *)--p; 687 } 688 (void) __ungetc(c, fp); 689 } 690 if ((flags & SUPPRESS) == 0) { 691 double res; 692 693 *p = 0; 694 /* XXX this loses precision for long doubles. */ 695 res = strtod(buf, (char **) NULL); 696 if (flags & LONGDBL) 697 *va_arg(ap, long double *) = res; 698 else if (flags & LONG) 699 *va_arg(ap, double *) = res; 700 else 701 *va_arg(ap, float *) = res; 702 nassigned++; 703 } 704 nread += p - buf; 705 nconversions++; 706 break; 707 #endif /* FLOATING_POINT */ 708 } 709 } 710 input_failure: 711 return (nconversions != 0 ? nassigned : EOF); 712 match_failure: 713 return (nassigned); 714 } 715 716 /* 717 * Fill in the given table from the scanset at the given format 718 * (just after `['). Return a pointer to the character past the 719 * closing `]'. The table has a 1 wherever characters should be 720 * considered part of the scanset. 721 */ 722 static const u_char * 723 __sccl(tab, fmt) 724 char *tab; 725 const u_char *fmt; 726 { 727 int c, n, v, i; 728 729 /* first `clear' the whole table */ 730 c = *fmt++; /* first char hat => negated scanset */ 731 if (c == '^') { 732 v = 1; /* default => accept */ 733 c = *fmt++; /* get new first char */ 734 } else 735 v = 0; /* default => reject */ 736 737 /* XXX: Will not work if sizeof(tab*) > sizeof(char) */ 738 (void) memset(tab, v, 256); 739 740 if (c == 0) 741 return (fmt - 1);/* format ended before closing ] */ 742 743 /* 744 * Now set the entries corresponding to the actual scanset 745 * to the opposite of the above. 746 * 747 * The first character may be ']' (or '-') without being special; 748 * the last character may be '-'. 749 */ 750 v = 1 - v; 751 for (;;) { 752 tab[c] = v; /* take character c */ 753 doswitch: 754 n = *fmt++; /* and examine the next */ 755 switch (n) { 756 757 case 0: /* format ended too soon */ 758 return (fmt - 1); 759 760 case '-': 761 /* 762 * A scanset of the form 763 * [01+-] 764 * is defined as `the digit 0, the digit 1, 765 * the character +, the character -', but 766 * the effect of a scanset such as 767 * [a-zA-Z0-9] 768 * is implementation defined. The V7 Unix 769 * scanf treats `a-z' as `the letters a through 770 * z', but treats `a-a' as `the letter a, the 771 * character -, and the letter a'. 772 * 773 * For compatibility, the `-' is not considerd 774 * to define a range if the character following 775 * it is either a close bracket (required by ANSI) 776 * or is not numerically greater than the character 777 * we just stored in the table (c). 778 */ 779 n = *fmt; 780 if (n == ']' 781 || (__collate_load_error ? n < c : 782 __collate_range_cmp (n, c) < 0 783 ) 784 ) { 785 c = '-'; 786 break; /* resume the for(;;) */ 787 } 788 fmt++; 789 /* fill in the range */ 790 if (__collate_load_error) { 791 do { 792 tab[++c] = v; 793 } while (c < n); 794 } else { 795 for (i = 0; i < 256; i ++) 796 if ( __collate_range_cmp (c, i) < 0 797 && __collate_range_cmp (i, n) <= 0 798 ) 799 tab[i] = v; 800 } 801 #if 1 /* XXX another disgusting compatibility hack */ 802 c = n; 803 /* 804 * Alas, the V7 Unix scanf also treats formats 805 * such as [a-c-e] as `the letters a through e'. 806 * This too is permitted by the standard.... 807 */ 808 goto doswitch; 809 #else 810 c = *fmt++; 811 if (c == 0) 812 return (fmt - 1); 813 if (c == ']') 814 return (fmt); 815 #endif 816 break; 817 818 case ']': /* end of scanset */ 819 return (fmt); 820 821 default: /* just another character */ 822 c = n; 823 break; 824 } 825 } 826 /* NOTREACHED */ 827 } 828