dlls/msvcrt/scanf.h

   1 /*
   2  * general implementation of scanf used by scanf, sscanf, fscanf,
   3  * _cscanf, wscanf, swscanf and fwscanf
   4  *
   5  * Copyright 1996,1998 Marcus Meissner
   6  * Copyright 1996 Jukka Iivonen
   7  * Copyright 1997,2000, 2003 Uwe Bonnes
   8  * Copyright 2000 Jon Griffiths
   9  * Copyright 2002 Daniel Gudbjartsson
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 #ifdef WIDE_SCANF
  27 #define _CHAR_ wchar_t
  28 #define _EOF_ WEOF
  29 #define _EOF_RET (short)WEOF
  30 #define _ISSPACE_(c) iswspace(c)
  31 #define _WIDE2SUPPORTED_(c) c /* No conversion needed (wide to wide) */
  32 #define _CHAR2SUPPORTED_(c) c /* FIXME: convert char to wide char */
  33 #define _CHAR2DIGIT_(c, base) wchar2digit((c), (base))
  34 #define _BITMAPSIZE_ 256*256
  35 #else /* WIDE_SCANF */
  36 #define _CHAR_ char
  37 #define _EOF_ EOF
  38 #define _EOF_RET EOF
  39 #define _ISSPACE_(c) isspace(c)
  40 #define _WIDE2SUPPORTED_(c) c /* FIXME: convert wide char to char */
  41 #define _CHAR2SUPPORTED_(c) c /* No conversion needed (char to char) */
  42 #define _CHAR2DIGIT_(c, base) char2digit((c), (base))
  43 #define _BITMAPSIZE_ 256
  44 #endif /* WIDE_SCANF */
  45
  46 #ifdef CONSOLE
  47 #define _GETC_FUNC_(file) _getch()
  48 #define _STRTOD_NAME_(func) console_ ## func
  49 #define _GETC_(file) (consumed++, _getch())
  50 #define _UNGETC_(nch, file) do { _ungetch(nch); consumed--; } while(0)
  51 #define _LOCK_FILE_(file) _lock_file(MSVCRT_stdin)
  52 #define _UNLOCK_FILE_(file) _unlock_file(MSVCRT_stdin)
  53 #ifdef WIDE_SCANF
  54 #ifdef SECURE
  55 #define _FUNCTION_ static int vcwscanf_s_l(const wchar_t *format, _locale_t locale, va_list ap)
  56 #else  /* SECURE */
  57 #define _FUNCTION_ static int vcwscanf_l(const wchar_t *format, _locale_t locale, va_list ap)
  58 #endif /* SECURE */
  59 #else  /* WIDE_SCANF */
  60 #ifdef SECURE
  61 #define _FUNCTION_ static int vcscanf_s_l(const char *format, _locale_t locale, va_list ap)
  62 #else  /* SECURE */
  63 #define _FUNCTION_ static int vcscanf_l(const char *format, _locale_t locale, va_list ap)
  64 #endif /* SECURE */
  65 #endif /* WIDE_SCANF */
  66 #else
  67 #ifdef STRING
  68 #undef _EOF_
  69 #define _EOF_ 0
  70 #define _GETC_FUNC_(file) (*file++)
  71 #ifdef WIDE_SCANF
  72 #define _STRTOD_NAME_(func) wstr_ ## func
  73 #else
  74 #define _STRTOD_NAME_(func) str_ ## func
  75 #endif
  76 #ifdef STRING_LEN
  77 #ifdef WIDE_SCANF
  78 #define _GETC_(file) (consumed++, consumed>length ? '\0' : *file++)
  79 #else /* WIDE_SCANF */
  80 #define _GETC_(file) (consumed++, consumed>length ? '\0' : (unsigned char)*file++)
  81 #endif /* WIDE_SCANF */
  82 #define _UNGETC_(nch, file) do { file--; consumed--; } while(0)
  83 #define _LOCK_FILE_(file) do {} while(0)
  84 #define _UNLOCK_FILE_(file) do {} while(0)
  85 #ifdef WIDE_SCANF
  86 #ifdef SECURE
  87 #define _FUNCTION_ static int vsnwscanf_s_l(const wchar_t *file, size_t length, const wchar_t *format, _locale_t locale, va_list ap)
  88 #else  /* SECURE */
  89 #define _FUNCTION_ static int vsnwscanf_l(const wchar_t *file, size_t length, const wchar_t *format, _locale_t locale, va_list ap)
  90 #endif /* SECURE */
  91 #else /* WIDE_SCANF */
  92 #ifdef SECURE
  93 #define _FUNCTION_ static int vsnscanf_s_l(const char *file, size_t length, const char *format, _locale_t locale, va_list ap)
  94 #else  /* SECURE */
  95 #define _FUNCTION_ static int vsnscanf_l(const char *file, size_t length, const char *format, _locale_t locale, va_list ap)
  96 #endif /* SECURE */
  97 #endif /* WIDE_SCANF */
  98 #else /* STRING_LEN */
  99 #ifdef WIDE_SCANF
 100 #define _GETC_(file) (consumed++, *file++)
 101 #else /* WIDE_SCANF */
 102 #define _GETC_(file) (consumed++, (unsigned char)*file++)
 103 #endif /* WIDE_SCANF */
 104 #define _UNGETC_(nch, file) do { file--; consumed--; } while(0)
 105 #define _LOCK_FILE_(file) do {} while(0)
 106 #define _UNLOCK_FILE_(file) do {} while(0)
 107 #ifdef WIDE_SCANF
 108 #ifdef SECURE
 109 #define _FUNCTION_ static int vswscanf_s_l(const wchar_t *file, const wchar_t *format, _locale_t locale, va_list ap)
 110 #else  /* SECURE */
 111 #define _FUNCTION_ static int vswscanf_l(const wchar_t *file, const wchar_t *format, _locale_t locale, va_list ap)
 112 #endif /* SECURE */
 113 #else /* WIDE_SCANF */
 114 #ifdef SECURE
 115 #define _FUNCTION_ static int vsscanf_s_l(const char *file, const char *format, _locale_t locale, va_list ap)
 116 #else  /* SECURE */
 117 #define _FUNCTION_ static int vsscanf_l(const char *file, const char *format, _locale_t locale, va_list ap)
 118 #endif /* SECURE */
 119 #endif /* WIDE_SCANF */
 120 #endif /* STRING_LEN */
 121 #else /* STRING */
 122 #ifdef WIDE_SCANF
 123 #define _GETC_FUNC_(file) fgetwc(file)
 124 #define _STRTOD_NAME_(func) filew_ ## func
 125 #define _GETC_(file) (consumed++, fgetwc(file))
 126 #define _UNGETC_(nch, file) do { ungetwc(nch, file); consumed--; } while(0)
 127 #define _LOCK_FILE_(file) _lock_file(file)
 128 #define _UNLOCK_FILE_(file) _unlock_file(file)
 129 #ifdef SECURE
 130 #define _FUNCTION_ static int vfwscanf_s_l(FILE* file, const wchar_t *format, _locale_t locale, va_list ap)
 131 #else  /* SECURE */
 132 #define _FUNCTION_ static int vfwscanf_l(FILE* file, const wchar_t *format, _locale_t locale, va_list ap)
 133 #endif /* SECURE */
 134 #else /* WIDE_SCANF */
 135 #define _GETC_FUNC_(file) fgetc(file)
 136 #define _STRTOD_NAME_(func) file_ ## func
 137 #define _GETC_(file) (consumed++, fgetc(file))
 138 #define _UNGETC_(nch, file) do { ungetc(nch, file); consumed--; } while(0)
 139 #define _LOCK_FILE_(file) _lock_file(file)
 140 #define _UNLOCK_FILE_(file) _unlock_file(file)
 141 #ifdef SECURE
 142 #define _FUNCTION_ static int vfscanf_s_l(FILE* file, const char *format, _locale_t locale, va_list ap)
 143 #else  /* SECURE */
 144 #define _FUNCTION_ static int vfscanf_l(FILE* file, const char *format, _locale_t locale, va_list ap)
 145 #endif /* SECURE */
 146 #endif /* WIDE_SCANF */
 147 #endif /* STRING */
 148 #endif /* CONSOLE */
 149
 150 #if (!defined(SECURE) && !defined(STRING_LEN) && (!defined(CONSOLE) || !defined(WIDE_SCANF)))
 151 struct _STRTOD_NAME_(strtod_scanf_ctx) {
 152     pthreadlocinfo locinfo;
 153 #ifdef STRING
 154     const _CHAR_ *file;
 155 #else
 156     FILE *file;
 157 #endif
 158     int length;
 159     int read;
 160     int cur;
 161     int unget;
 162     BOOL err;
 163 };
 164
 165 static wchar_t _STRTOD_NAME_(strtod_scanf_get)(void *ctx)
 166 {
 167     struct _STRTOD_NAME_(strtod_scanf_ctx) *context = ctx;
 168
 169     context->cur = _EOF_;
 170     if (!context->length) return WEOF;
 171     if (context->unget != _EOF_) {
 172         context->cur = context->unget;
 173         context->unget = _EOF_;
 174     } else {
 175         context->cur = _GETC_FUNC_(context->file);
 176         if (context->cur == _EOF_) return WEOF;
 177     }
 178
 179     if (context->length > 0) context->length--;
 180     context->read++;
 181     return context->cur;
 182 }
 183
 184 static void _STRTOD_NAME_(strtod_scanf_unget)(void *ctx)
 185 {
 186     struct _STRTOD_NAME_(strtod_scanf_ctx) *context = ctx;
 187
 188     if (context->length >= 0) context->length++;
 189     context->read--;
 190     if (context->unget != _EOF_ || context->cur == _EOF_) {
 191         context->err = TRUE;
 192         return;
 193     }
 194     context->unget = context->cur;
 195 }
 196 #endif
 197
 198 _FUNCTION_ {
 199     pthreadlocinfo locinfo;
 200     int rd = 0, consumed = 0;
 201     int nch;
 202     if (!*format) return 0;
 203 #ifndef WIDE_SCANF
 204 #ifdef CONSOLE
 205     TRACE("(%s):\n", debugstr_a(format));
 206 #else /* CONSOLE */
 207 #ifdef STRING
 208     TRACE("%s (%s)\n", debugstr_a(file), debugstr_a(format));
 209 #else /* STRING */
 210     TRACE("%p (%s)\n", file, debugstr_a(format));
 211 #endif /* STRING */
 212 #endif /* CONSOLE */
 213 #endif /* WIDE_SCANF */
 214     _LOCK_FILE_(file);
 215
 216     nch = _GETC_(file);
 217     if (nch == _EOF_) {
 218         _UNLOCK_FILE_(file);
 219         return _EOF_RET;
 220     }
 221
 222     if(!locale)
 223         locinfo = get_locinfo();
 224     else
 225         locinfo = locale->locinfo;
 226
 227     while (*format) {
 228         /* a whitespace character in the format string causes scanf to read,
 229          * but not store, all consecutive white-space characters in the input
 230          * up to the next non-white-space character.  One white space character
 231          * in the input matches any number (including zero) and combination of
 232          * white-space characters in the input. */
 233         if (_ISSPACE_(*format)) {
 234             /* skip whitespace */
 235             while ((nch!=_EOF_) && _ISSPACE_(nch))
 236                 nch = _GETC_(file);
 237         }
 238         /* a format specification causes scanf to read and convert characters
 239          * in the input into values of a specified type.  The value is assigned
 240          * to an argument in the argument list.  Format specifications have
 241          * the form %[*][width][{h | l | I64 | L}]type */
 242         else if (*format == '%') {
 243             int st = 0; int suppress = 0; int width = 0;
 244             int base;
 245             int h_prefix = 0;
 246             int l_prefix = 0;
 247             int L_prefix = 0;
 248             int w_prefix = 0;
 249             int prefix_finished = 0;
 250             int I64_prefix = 0;
 251             format++;
 252             /* look for leading asterisk, which means 'suppress assignment of
 253              * this field'. */
 254             if (*format=='*') {
 255                 format++;
 256                 suppress=1;
 257             }
 258             /* read prefix (if any) */
 259             while (!prefix_finished) {
 260                 /* look for width specification */
 261                 while (*format >= '0' && *format <= '9') {
 262                     width *= 10;
 263                     width += *format++ - '0';
 264                 }
 265
 266                 switch(*format) {
 267                 case 'h': h_prefix++; break;
 268                 case 'l':
 269                     if(*(format+1) == 'l') {
 270                         I64_prefix = 1;
 271                         format++;
 272                     }
 273                     l_prefix = 1;
 274                     break;
 275                 case 'w': w_prefix = 1; break;
 276                 case 'L': L_prefix = 1; break;
 277                 case 'I':
 278                     if (*(format + 1) == '6' &&
 279                         *(format + 2) == '4') {
 280                         I64_prefix = 1;
 281                         format += 2;
 282                         break;
 283                     }
 284                     else if (*(format + 1) == '3' &&
 285                              *(format + 2) == '2') {
 286                         format += 2;
 287                         break;
 288                     }
 289                     /* fall through */
 290 #if _MSVCR_VER == 0 || _MSVCR_VER >= 140
 291                 case 'z':
 292 #endif
 293                     if (sizeof(void *) == sizeof(LONGLONG)) I64_prefix = 1;
 294                     break;
 295                 default:
 296                     prefix_finished = 1;
 297                 }
 298                 if (!prefix_finished) format++;
 299             }
 300             if (width==0) width=-1; /* no width spec seen */
 301             /* read type */
 302             switch(*format) {
 303             case 'p':
 304             case 'P': /* pointer. */
 305                 if (sizeof(void *) == sizeof(LONGLONG)) I64_prefix = 1;
 306                 /* fall through */
 307             case 'x':
 308             case 'X': /* hexadecimal integer. */
 309                 base = 16;
 310                 goto number;
 311             case 'o': /* octal integer */
 312                 base = 8;
 313                 goto number;
 314             case 'u': /* unsigned decimal integer */
 315                 base = 10;
 316                 goto number;
 317             case 'd': /* signed decimal integer */
 318                 base = 10;
 319                 goto number;
 320             case 'i': /* generic integer */
 321                 base = 0;
 322             number: {
 323                     /* read an integer */
 324                     ULONGLONG cur = 0;
 325                     int negative = 0;
 326                     int seendigit=0;
 327                     /* skip initial whitespace */
 328                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 329                         nch = _GETC_(file);
 330                     /* get sign */
 331                     if (nch == '-' || nch == '+') {
 332                         negative = (nch=='-');
 333                         nch = _GETC_(file);
 334                         if (width>0) width--;
 335                     }
 336                     /* look for leading indication of base */
 337                     if (width!=0 && nch == '0' && *format != 'p' && *format != 'P') {
 338                         nch = _GETC_(file);
 339                         if (width>0) width--;
 340                         seendigit=1;
 341                         if (width!=0 && (nch=='x' || nch=='X')) {
 342                             if (base==0)
 343                                 base=16;
 344                             if (base==16) {
 345                                 nch = _GETC_(file);
 346                                 if (width>0) width--;
 347                                 seendigit=0;
 348                             }
 349                         } else if (base==0)
 350                             base = 8;
 351                     }
 352                     /* format %i without indication of base */
 353                     if (base==0)
 354                         base = 10;
 355                     /* throw away leading zeros */
 356                     while (width!=0 && nch=='0') {
 357                         nch = _GETC_(file);
 358                         if (width>0) width--;
 359                         seendigit=1;
 360                     }
 361                     if (width!=0 && _CHAR2DIGIT_(nch, base)!=-1) {
 362                         cur = _CHAR2DIGIT_(nch, base);
 363                         nch = _GETC_(file);
 364                         if (width>0) width--;
 365                         seendigit=1;
 366                     }
 367                     /* read until no more digits */
 368                     while (width!=0 && (nch!=_EOF_) && _CHAR2DIGIT_(nch, base)!=-1) {
 369                         cur = cur*base + _CHAR2DIGIT_(nch, base);
 370                         nch = _GETC_(file);
 371                         if (width>0) width--;
 372                         seendigit=1;
 373                     }
 374                     /* okay, done! */
 375                     if (!seendigit) break; /* not a valid number */
 376                     st = 1;
 377                     if (!suppress) {
 378 #define _SET_NUMBER_(type) *va_arg(ap, type*) = negative ? -cur : cur
 379                         if (I64_prefix) _SET_NUMBER_(LONGLONG);
 380                         else if (l_prefix) _SET_NUMBER_(LONG);
 381                         else if (h_prefix == 1) _SET_NUMBER_(short int);
 382 #if _MSVCR_VER >= 140
 383                         else if (h_prefix == 2) _SET_NUMBER_(char);
 384 #endif
 385                         else _SET_NUMBER_(int);
 386                     }
 387                 }
 388                 break;
 389             case 'e':
 390             case 'E':
 391             case 'f':
 392             case 'g':
 393             case 'G': { /* read a float */
 394 #ifdef CONSOLE
 395                     struct _STRTOD_NAME_(strtod_scanf_ctx) ctx = {locinfo, 0, width};
 396 #else
 397                     struct _STRTOD_NAME_(strtod_scanf_ctx) ctx = {locinfo, file, width};
 398 #endif
 399                     int negative = 0;
 400                     struct fpnum fp;
 401                     double cur;
 402
 403                     /* skip initial whitespace */
 404                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 405                         nch = _GETC_(file);
 406                     if (nch == _EOF_)
 407                         break;
 408                     ctx.unget = nch;
 409 #ifdef STRING
 410                     ctx.file = file;
 411 #endif
 412 #ifdef STRING_LEN
 413                     if(ctx.length > length-consumed+1) ctx.length = length-consumed+1;
 414 #endif
 415
 416                     fp = fpnum_parse(_STRTOD_NAME_(strtod_scanf_get),
 417                             _STRTOD_NAME_(strtod_scanf_unget), &ctx, locinfo, FALSE);
 418                     fpnum_double(&fp, &cur);
 419                     if(!rd && ctx.err) {
 420                         _UNLOCK_FILE_(file);
 421                         return _EOF_RET;
 422                     }
 423                     if(ctx.err || !ctx.read)
 424                         break;
 425                     consumed += ctx.read;
 426 #ifdef STRING
 427                     file = ctx.file;
 428 #endif
 429                     nch = ctx.cur;
 430
 431                     st = 1;
 432                     if (!suppress) {
 433                         if (L_prefix || l_prefix) _SET_NUMBER_(double);
 434                         else _SET_NUMBER_(float);
 435                     }
 436                 }
 437                 break;
 438                 /* According to msdn,
 439                  * 's' reads a character string in a call to fscanf
 440                  * and 'S' a wide character string and vice versa in a
 441                  * call to fwscanf. The 'h', 'w' and 'l' prefixes override
 442                  * this behaviour. 'h' forces reading char * but 'l' and 'w'
 443                  * force reading WCHAR. */
 444             case 's':
 445                     if (w_prefix || l_prefix) goto widecharstring;
 446                     else if (h_prefix) goto charstring;
 447 #ifdef WIDE_SCANF
 448                     else goto widecharstring;
 449 #else /* WIDE_SCANF */
 450                     else goto charstring;
 451 #endif /* WIDE_SCANF */
 452             case 'S':
 453                     if (w_prefix || l_prefix) goto widecharstring;
 454                     else if (h_prefix) goto charstring;
 455 #ifdef WIDE_SCANF
 456                     else goto charstring;
 457 #else /* WIDE_SCANF */
 458                     else goto widecharstring;
 459 #endif /* WIDE_SCANF */
 460             charstring: { /* read a word into a char */
 461                     char *sptr = suppress ? NULL : va_arg(ap, char*);
 462                     char *sptr_beg = sptr;
 463 #ifdef SECURE
 464                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 465 #else
 466                     unsigned size = UINT_MAX;
 467 #endif
 468                     /* skip initial whitespace */
 469                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 470                         nch = _GETC_(file);
 471                     /* read until whitespace */
 472                     while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
 473                         if (!suppress) {
 474                             *sptr++ = _CHAR2SUPPORTED_(nch);
 475                             if(size>1) size--;
 476                             else {
 477                                 _UNLOCK_FILE_(file);
 478                                 *sptr_beg = 0;
 479                                 return rd;
 480                             }
 481                         }
 482                         st++;
 483                         nch = _GETC_(file);
 484                         if (width>0) width--;
 485                     }
 486                     /* if we have reached the EOF and output nothing then report EOF */
 487                     if (nch==_EOF_ && rd==0 && st==0) {
 488                         _UNLOCK_FILE_(file);
 489                         return _EOF_RET;
 490                     }
 491                     /* terminate */
 492                     if (st && !suppress) *sptr = 0;
 493                 }
 494                 break;
 495             widecharstring: { /* read a word into a wchar_t* */
 496                     wchar_t *sptr = suppress ? NULL : va_arg(ap, wchar_t*);
 497                     wchar_t *sptr_beg = sptr;
 498 #ifdef SECURE
 499                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 500 #else
 501                     unsigned size = UINT_MAX;
 502 #endif
 503                     /* skip initial whitespace */
 504                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 505                         nch = _GETC_(file);
 506                     /* read until whitespace */
 507                     while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
 508                         if (!suppress) {
 509                             *sptr++ = _WIDE2SUPPORTED_(nch);
 510                             if(size>1) size--;
 511                             else {
 512                                 _UNLOCK_FILE_(file);
 513                                 *sptr_beg = 0;
 514                                 return rd;
 515                             }
 516                         }
 517                         st++;
 518                         nch = _GETC_(file);
 519                         if (width>0) width--;
 520                     }
 521 #if _MSVCR_VER >= 80
 522                     /* if we have reached the EOF and output nothing then report EOF */
 523                     if (nch==_EOF_ && rd==0 && st==0) {
 524                         _UNLOCK_FILE_(file);
 525                         return _EOF_RET;
 526                     }
 527 #endif
 528                     /* terminate */
 529                     if (st && !suppress) *sptr = 0;
 530                 }
 531                 break;
 532             /* 'c' and 'C work analogously to 's' and 'S' as described
 533              * above */
 534             case 'c':
 535                     if (w_prefix || l_prefix) goto widecharacter;
 536                     else if (h_prefix) goto character;
 537 #ifdef WIDE_SCANF
 538                     else goto widecharacter;
 539 #else /* WIDE_SCANF */
 540                     else goto character;
 541 #endif /* WIDE_SCANF */
 542             case 'C':
 543                     if (w_prefix || l_prefix) goto widecharacter;
 544                     else if (h_prefix) goto character;
 545 #ifdef WIDE_SCANF
 546                     else goto character;
 547 #else /* WIDE_SCANF */
 548                     else goto widecharacter;
 549 #endif /* WIDE_SCANF */
 550           character: { /* read single character into char */
 551                     char *str = suppress ? NULL : va_arg(ap, char*);
 552                     char *pstr = str;
 553 #ifdef SECURE
 554                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 555 #else
 556                     unsigned size = UINT_MAX;
 557 #endif
 558                     if (width == -1) width = 1;
 559                     while (width && (nch != _EOF_))
 560                     {
 561                         if (!suppress) {
 562                             if(size) size--;
 563                             else {
 564                                 _UNLOCK_FILE_(file);
 565                                 *pstr = 0;
 566                                 return rd;
 567                             }
 568                             *str++ = _CHAR2SUPPORTED_(nch);
 569                         }
 570                         st++;
 571                         width--;
 572                         nch = _GETC_(file);
 573                     }
 574                 }
 575                 break;
 576           widecharacter: { /* read single character into a wchar_t */
 577                     wchar_t *str = suppress ? NULL : va_arg(ap, wchar_t*);
 578                     wchar_t *pstr = str;
 579 #ifdef SECURE
 580                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 581 #else
 582                     unsigned size = UINT_MAX;
 583 #endif
 584                     if (width == -1) width = 1;
 585                     while (width && (nch != _EOF_))
 586                     {
 587                         if (!suppress) {
 588                             if(size) size--;
 589                             else {
 590                                 _UNLOCK_FILE_(file);
 591                                 *pstr = 0;
 592                                 return rd;
 593                             }
 594                             *str++ = _WIDE2SUPPORTED_(nch);
 595                         }
 596                         st++;
 597                         width--;
 598                         nch = _GETC_(file);
 599                     }
 600                 }
 601                 break;
 602             case 'n': {
 603                     if (!suppress) {
 604                         int*n = va_arg(ap, int*);
 605                         *n = consumed - 1;
 606                     }
 607                     /* This is an odd one: according to the standard,
 608                      * "Execution of a %n directive does not increment the
 609                      * assignment count returned at the completion of
 610                      * execution" even if it wasn't suppressed with the
 611                      * '*' flag.  The Corrigendum to the standard seems
 612                      * to contradict this (comment out the assignment to
 613                      * suppress below if you want to implement these
 614                      * alternate semantics) but the windows program I'm
 615                      * looking at expects the behavior I've coded here
 616                      * (which happens to be what glibc does as well).
 617                      */
 618                     suppress = 1;
 619                     st = 1;
 620                 }
 621                 break;
 622             case '[': {
 623                     _CHAR_ *str = suppress ? NULL : va_arg(ap, _CHAR_*);
 624                     _CHAR_ *sptr = str;
 625                     RTL_BITMAP bitMask;
 626                     ULONG *Mask;
 627                     int invert = 0; /* Set if we are NOT to find the chars */
 628 #ifdef SECURE
 629                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 630 #else
 631                     unsigned size = UINT_MAX;
 632 #endif
 633
 634                     /* Init our bitmap */
 635                     Mask = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, _BITMAPSIZE_/8);
 636                     RtlInitializeBitMap(&bitMask, Mask, _BITMAPSIZE_);
 637
 638                     /* Read the format */
 639                     format++;
 640                     if(*format == '^') {
 641                         invert = 1;
 642                         format++;
 643                     }
 644                     if(*format == ']') {
 645                         RtlSetBits(&bitMask, ']', 1);
 646                         format++;
 647                     }
 648                     while(*format && (*format != ']')) {
 649                         /* According to msdn:
 650                          * "Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]." */
 651                         if(format[1] == '-' && format[2] && format[2] != ']') {
 652                             if (format[0] < format[2])
 653                                 RtlSetBits(&bitMask, format[0], format[2] - format[0] + 1);
 654                             else
 655                                 RtlSetBits(&bitMask, format[2], format[0] - format[2] + 1);
 656                             format += 2;
 657                         } else
 658                             RtlSetBits(&bitMask, *format, 1);
 659                         format++;
 660                     }
 661                     /* read until char is not suitable */
 662                     while ((width != 0) && (nch != _EOF_)) {
 663                         if(!invert) {
 664                             if(RtlAreBitsSet(&bitMask, nch, 1)) {
 665                                 if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch);
 666                             } else
 667                                 break;
 668                         } else {
 669                             if(RtlAreBitsClear(&bitMask, nch, 1)) {
 670                                 if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch);
 671                             } else
 672                                 break;
 673                         }
 674                         st++;
 675                         nch = _GETC_(file);
 676                         if (width>0) width--;
 677                         if(size>1) size--;
 678                         else {
 679                             _UNLOCK_FILE_(file);
 680                             *str = 0;
 681                             HeapFree(GetProcessHeap(), 0, Mask);
 682                             return rd;
 683                         }
 684                     }
 685                     /* terminate */
 686                     if (!suppress) *sptr = 0;
 687                     HeapFree(GetProcessHeap(), 0, Mask);
 688                 }
 689                 break;
 690             default:
 691                 /* From spec: "if a percent sign is followed by a character
 692                  * that has no meaning as a format-control character, that
 693                  * character and the following characters are treated as
 694                  * an ordinary sequence of characters, that is, a sequence
 695                  * of characters that must match the input.  For example,
 696                  * to specify that a percent-sign character is to be input,
 697                  * use %%." */
 698                 while ((nch!=_EOF_) && _ISSPACE_(nch))
 699                     nch = _GETC_(file);
 700                 if ((_CHAR_)nch == *format) {
 701                     suppress = 1; /* whoops no field to be read */
 702                     st = 1; /* but we got what we expected */
 703                     nch = _GETC_(file);
 704                 }
 705                 break;
 706             }
 707             if (st && !suppress) rd++;
 708             else if (!st) break;
 709         }
 710         /* a non-white-space character causes scanf to read, but not store,
 711          * a matching non-white-space character. */
 712         else {
 713             /* check for character match */
 714             if ((_CHAR_)nch == *format) {
 715                 nch = _GETC_(file);
 716             } else break;
 717         }
 718         format++;
 719     }
 720     if (nch!=_EOF_) {
 721         _UNGETC_(nch, file);
 722     }
 723
 724     TRACE("returning %d\n", rd);
 725     _UNLOCK_FILE_(file);
 726     return rd;
 727 }
 728
 729 #undef _CHAR_
 730 #undef _EOF_
 731 #undef _EOF_RET
 732 #undef _ISSPACE_
 733 #undef _CHAR2SUPPORTED_
 734 #undef _WIDE2SUPPORTED_
 735 #undef _CHAR2DIGIT_
 736 #undef _GETC_FUNC_
 737 #undef _STRTOD_NAME_
 738 #undef _GETC_
 739 #undef _UNGETC_
 740 #undef _LOCK_FILE_
 741 #undef _UNLOCK_FILE_
 742 #undef _FUNCTION_
 743 #undef _BITMAPSIZE_