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_ MSVCRT_wchar_t
  28 #define _EOF_ MSVCRT_WEOF
  29 #define _EOF_RET (short)MSVCRT_WEOF
  30 #define _ISSPACE_(c) MSVCRT_iswspace(c)
  31 #define _ISDIGIT_(c) MSVCRT_iswdigit(c)
  32 #define _WIDE2SUPPORTED_(c) c /* No conversion needed (wide to wide) */
  33 #define _CHAR2SUPPORTED_(c) c /* FIXME: convert char to wide char */
  34 #define _CHAR2DIGIT_(c, base) wchar2digit((c), (base))
  35 #define _BITMAPSIZE_ 256*256
  36 #else /* WIDE_SCANF */
  37 #define _CHAR_ char
  38 #define _EOF_ MSVCRT_EOF
  39 #define _EOF_RET MSVCRT_EOF
  40 #define _ISSPACE_(c) isspace(c)
  41 #define _ISDIGIT_(c) isdigit(c)
  42 #define _WIDE2SUPPORTED_(c) c /* FIXME: convert wide char to char */
  43 #define _CHAR2SUPPORTED_(c) c /* No conversion needed (char to char) */
  44 #define _CHAR2DIGIT_(c, base) char2digit((c), (base))
  45 #define _BITMAPSIZE_ 256
  46 #endif /* WIDE_SCANF */
  47
  48 #ifdef CONSOLE
  49 #define _GETC_(file) (consumed++, _getch())
  50 #define _UNGETC_(nch, file) do { _ungetch(nch); consumed--; } while(0)
  51 #define _LOCK_FILE_(file) MSVCRT__lock_file(MSVCRT_stdin)
  52 #define _UNLOCK_FILE_(file) MSVCRT__unlock_file(MSVCRT_stdin)
  53 #ifdef WIDE_SCANF
  54 #ifdef SECURE
  55 #define _FUNCTION_ static int MSVCRT_vcwscanf_s_l(const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  56 #else  /* SECURE */
  57 #define _FUNCTION_ static int MSVCRT_vcwscanf_l(const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  58 #endif /* SECURE */
  59 #else  /* WIDE_SCANF */
  60 #ifdef SECURE
  61 #define _FUNCTION_ static int MSVCRT_vcscanf_s_l(const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  62 #else  /* SECURE */
  63 #define _FUNCTION_ static int MSVCRT_vcscanf_l(const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  64 #endif /* SECURE */
  65 #endif /* WIDE_SCANF */
  66 #else
  67 #ifdef STRING
  68 #undef _EOF_
  69 #define _EOF_ 0
  70 #ifdef STRING_LEN
  71 #define _GETC_(file) (consumed==length ? '\0' : (consumed++, *file++))
  72 #define _UNGETC_(nch, file) do { file--; consumed--; } while(0)
  73 #define _LOCK_FILE_(file) do {} while(0)
  74 #define _UNLOCK_FILE_(file) do {} while(0)
  75 #ifdef WIDE_SCANF
  76 #ifdef SECURE
  77 #define _FUNCTION_ static int MSVCRT_vsnwscanf_s_l(const MSVCRT_wchar_t *file, MSVCRT_size_t length, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
  78 #else  /* SECURE */
  79 #define _FUNCTION_ static int MSVCRT_vsnwscanf_l(const MSVCRT_wchar_t *file, MSVCRT_size_t length, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
  80 #endif /* SECURE */
  81 #else /* WIDE_SCANF */
  82 #ifdef SECURE
  83 #define _FUNCTION_ static int MSVCRT_vsnscanf_s_l(const char *file, MSVCRT_size_t length, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  84 #else  /* SECURE */
  85 #define _FUNCTION_ static int MSVCRT_vsnscanf_l(const char *file, MSVCRT_size_t length, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
  86 #endif /* SECURE */
  87 #endif /* WIDE_SCANF */
  88 #else /* STRING_LEN */
  89 #define _GETC_(file) (consumed++, *file++)
  90 #define _UNGETC_(nch, file) do { file--; consumed--; } while(0)
  91 #define _LOCK_FILE_(file) do {} while(0)
  92 #define _UNLOCK_FILE_(file) do {} while(0)
  93 #ifdef WIDE_SCANF
  94 #ifdef SECURE
  95 #define _FUNCTION_ static int MSVCRT_vswscanf_s_l(const MSVCRT_wchar_t *file, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
  96 #else  /* SECURE */
  97 #define _FUNCTION_ static int MSVCRT_vswscanf_l(const MSVCRT_wchar_t *file, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
  98 #endif /* SECURE */
  99 #else /* WIDE_SCANF */
 100 #ifdef SECURE
 101 #define _FUNCTION_ static int MSVCRT_vsscanf_s_l(const char *file, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
 102 #else  /* SECURE */
 103 #define _FUNCTION_ static int MSVCRT_vsscanf_l(const char *file, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
 104 #endif /* SECURE */
 105 #endif /* WIDE_SCANF */
 106 #endif /* STRING_LEN */
 107 #else /* STRING */
 108 #ifdef WIDE_SCANF
 109 #define _GETC_(file) (consumed++, MSVCRT_fgetwc(file))
 110 #define _UNGETC_(nch, file) do { MSVCRT_ungetwc(nch, file); consumed--; } while(0)
 111 #define _LOCK_FILE_(file) MSVCRT__lock_file(file)
 112 #define _UNLOCK_FILE_(file) MSVCRT__unlock_file(file)
 113 #ifdef SECURE
 114 #define _FUNCTION_ static int MSVCRT_vfwscanf_s_l(MSVCRT_FILE* file, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
 115 #else  /* SECURE */
 116 #define _FUNCTION_ static int MSVCRT_vfwscanf_l(MSVCRT_FILE* file, const MSVCRT_wchar_t *format, MSVCRT__locale_t locale, __ms_va_list ap)
 117 #endif /* SECURE */
 118 #else /* WIDE_SCANF */
 119 #define _GETC_(file) (consumed++, MSVCRT_fgetc(file))
 120 #define _UNGETC_(nch, file) do { MSVCRT_ungetc(nch, file); consumed--; } while(0)
 121 #define _LOCK_FILE_(file) MSVCRT__lock_file(file)
 122 #define _UNLOCK_FILE_(file) MSVCRT__unlock_file(file)
 123 #ifdef SECURE
 124 #define _FUNCTION_ static int MSVCRT_vfscanf_s_l(MSVCRT_FILE* file, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
 125 #else  /* SECURE */
 126 #define _FUNCTION_ static int MSVCRT_vfscanf_l(MSVCRT_FILE* file, const char *format, MSVCRT__locale_t locale, __ms_va_list ap)
 127 #endif /* SECURE */
 128 #endif /* WIDE_SCANF */
 129 #endif /* STRING */
 130 #endif /* CONSOLE */
 131
 132 _FUNCTION_ {
 133     MSVCRT_pthreadlocinfo locinfo;
 134     int rd = 0, consumed = 0;
 135     int nch;
 136     if (!*format) return 0;
 137 #ifndef WIDE_SCANF
 138 #ifdef CONSOLE
 139     TRACE("(%s):\n", debugstr_a(format));
 140 #else /* CONSOLE */
 141 #ifdef STRING
 142     TRACE("%s (%s)\n", debugstr_a(file), debugstr_a(format));
 143 #else /* STRING */
 144     TRACE("%p (%s)\n", file, debugstr_a(format));
 145 #endif /* STRING */
 146 #endif /* CONSOLE */
 147 #endif /* WIDE_SCANF */
 148     _LOCK_FILE_(file);
 149
 150     nch = _GETC_(file);
 151     if (nch == _EOF_) {
 152         _UNLOCK_FILE_(file);
 153         return _EOF_RET;
 154     }
 155
 156     if(!locale)
 157         locinfo = get_locinfo();
 158     else
 159         locinfo = locale->locinfo;
 160
 161     while (*format) {
 162         /* a whitespace character in the format string causes scanf to read,
 163          * but not store, all consecutive white-space characters in the input
 164          * up to the next non-white-space character.  One white space character
 165          * in the input matches any number (including zero) and combination of
 166          * white-space characters in the input. */
 167         if (_ISSPACE_(*format)) {
 168             /* skip whitespace */
 169             while ((nch!=_EOF_) && _ISSPACE_(nch))
 170                 nch = _GETC_(file);
 171         }
 172         /* a format specification causes scanf to read and convert characters
 173          * in the input into values of a specified type.  The value is assigned
 174          * to an argument in the argument list.  Format specifications have
 175          * the form %[*][width][{h | l | I64 | L}]type */
 176         else if (*format == '%') {
 177             int st = 0; int suppress = 0; int width = 0;
 178             int base;
 179             int h_prefix = 0;
 180             int l_prefix = 0;
 181             int L_prefix = 0;
 182             int w_prefix = 0;
 183             int prefix_finished = 0;
 184             int I64_prefix = 0;
 185             format++;
 186             /* look for leading asterisk, which means 'suppress assignment of
 187              * this field'. */
 188             if (*format=='*') {
 189                 format++;
 190                 suppress=1;
 191             }
 192             /* look for width specification */
 193             while (_ISDIGIT_(*format)) {
 194                 width*=10;
 195                 width+=*format++ - '0';
 196             }
 197             if (width==0) width=-1; /* no width spec seen */
 198             /* read prefix (if any) */
 199             while (!prefix_finished) {
 200                 switch(*format) {
 201                 case 'h': h_prefix++; break;
 202                 case 'l':
 203                     if(*(format+1) == 'l') {
 204                         I64_prefix = 1;
 205                         format++;
 206                     }
 207                     l_prefix = 1;
 208                     break;
 209                 case 'w': w_prefix = 1; break;
 210                 case 'L': L_prefix = 1; break;
 211                 case 'I':
 212                     if (*(format + 1) == '6' &&
 213                         *(format + 2) == '4') {
 214                         I64_prefix = 1;
 215                         format += 2;
 216                     }
 217                     break;
 218                 default:
 219                     prefix_finished = 1;
 220                 }
 221                 if (!prefix_finished) format++;
 222             }
 223             /* read type */
 224             switch(*format) {
 225             case 'p':
 226             case 'P': /* pointer. */
 227                 if (sizeof(void *) == sizeof(LONGLONG)) I64_prefix = 1;
 228                 /* fall through */
 229             case 'x':
 230             case 'X': /* hexadecimal integer. */
 231                 base = 16;
 232                 goto number;
 233             case 'o': /* octal integer */
 234                 base = 8;
 235                 goto number;
 236             case 'u': /* unsigned decimal integer */
 237                 base = 10;
 238                 goto number;
 239             case 'd': /* signed decimal integer */
 240                 base = 10;
 241                 goto number;
 242             case 'i': /* generic integer */
 243                 base = 0;
 244             number: {
 245                     /* read an integer */
 246                     ULONGLONG cur = 0;
 247                     int negative = 0;
 248                     int seendigit=0;
 249                     /* skip initial whitespace */
 250                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 251                         nch = _GETC_(file);
 252                     /* get sign */
 253                     if (nch == '-' || nch == '+') {
 254                         negative = (nch=='-');
 255                         nch = _GETC_(file);
 256                         if (width>0) width--;
 257                     }
 258                     /* look for leading indication of base */
 259                     if (width!=0 && nch == '0' && *format != 'p' && *format != 'P') {
 260                         nch = _GETC_(file);
 261                         if (width>0) width--;
 262                         seendigit=1;
 263                         if (width!=0 && (nch=='x' || nch=='X')) {
 264                             if (base==0)
 265                                 base=16;
 266                             if (base==16) {
 267                                 nch = _GETC_(file);
 268                                 if (width>0) width--;
 269                                 seendigit=0;
 270                             }
 271                         } else if (base==0)
 272                             base = 8;
 273                     }
 274                     /* format %i without indication of base */
 275                     if (base==0)
 276                         base = 10;
 277                     /* throw away leading zeros */
 278                     while (width!=0 && nch=='0') {
 279                         nch = _GETC_(file);
 280                         if (width>0) width--;
 281                         seendigit=1;
 282                     }
 283                     if (width!=0 && _CHAR2DIGIT_(nch, base)!=-1) {
 284                         cur = _CHAR2DIGIT_(nch, base);
 285                         nch = _GETC_(file);
 286                         if (width>0) width--;
 287                         seendigit=1;
 288                     }
 289                     /* read until no more digits */
 290                     while (width!=0 && (nch!=_EOF_) && _CHAR2DIGIT_(nch, base)!=-1) {
 291                         cur = cur*base + _CHAR2DIGIT_(nch, base);
 292                         nch = _GETC_(file);
 293                         if (width>0) width--;
 294                         seendigit=1;
 295                     }
 296                     /* okay, done! */
 297                     if (!seendigit) break; /* not a valid number */
 298                     st = 1;
 299                     if (!suppress) {
 300 #define _SET_NUMBER_(type) *va_arg(ap, type*) = negative ? -cur : cur
 301                         if (I64_prefix) _SET_NUMBER_(LONGLONG);
 302                         else if (l_prefix) _SET_NUMBER_(LONG);
 303                         else if (h_prefix == 1) _SET_NUMBER_(short int);
 304                         else _SET_NUMBER_(int);
 305                     }
 306                 }
 307                 break;
 308             case 'e':
 309             case 'E':
 310             case 'f':
 311             case 'g':
 312             case 'G': { /* read a float */
 313                     long double cur = 1, expcnt = 10;
 314                     ULONGLONG d, hlp;
 315                     int exp = 0, negative = 0;
 316                     unsigned fpcontrol;
 317                     BOOL negexp;
 318
 319                     /* skip initial whitespace */
 320                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 321                         nch = _GETC_(file);
 322
 323                     /* get sign. */
 324                     if (nch == '-' || nch == '+') {
 325                         negative = (nch=='-');
 326                         if (width>0) width--;
 327                         if (width==0) break;
 328                         nch = _GETC_(file);
 329                     }
 330
 331                     /* get first digit. */
 332                     if (*locinfo->lconv->decimal_point != nch) {
 333                         if (!_ISDIGIT_(nch)) break;
 334                         d = nch - '0';
 335                         nch = _GETC_(file);
 336                         if (width>0) width--;
 337                         /* read until no more digits */
 338                         while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
 339                             hlp = d*10 + nch - '0';
 340                             nch = _GETC_(file);
 341                             if (width>0) width--;
 342                             if(d > (ULONGLONG)-1/10 || hlp<d) {
 343                                 exp++;
 344                                 break;
 345                             }
 346                             else
 347                                 d = hlp;
 348                         }
 349                         while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
 350                             exp++;
 351                             nch = _GETC_(file);
 352                             if (width>0) width--;
 353                         }
 354                     } else {
 355                         d = 0; /* Fix: .8 -> 0.8 */
 356                     }
 357
 358                     /* handle decimals */
 359                     if (width!=0 && nch == *locinfo->lconv->decimal_point) {
 360                         nch = _GETC_(file);
 361                         if (width>0) width--;
 362
 363                         while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
 364                             hlp = d*10 + nch - '0';
 365                             nch = _GETC_(file);
 366                             if (width>0) width--;
 367                             if(d > (ULONGLONG)-1/10 || hlp<d)
 368                                 break;
 369
 370                             d = hlp;
 371                             exp--;
 372                         }
 373                         while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
 374                             nch = _GETC_(file);
 375                             if (width>0) width--;
 376                         }
 377                     }
 378
 379                     /* handle exponent */
 380                     if (width!=0 && (nch == 'e' || nch == 'E')) {
 381                         int sign = 1, e = 0;
 382
 383                         nch = _GETC_(file);
 384                         if (width>0) width--;
 385                         if (width!=0 && (nch=='+' || nch=='-')) {
 386                             if(nch == '-')
 387                                 sign = -1;
 388                             nch = _GETC_(file);
 389                             if (width>0) width--;
 390                         }
 391
 392                         /* exponent digits */
 393                         while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) {
 394                             if(e > INT_MAX/10 || (e = e*10 + nch - '0')<0)
 395                                 e = INT_MAX;
 396                             nch = _GETC_(file);
 397                             if (width>0) width--;
 398                         }
 399                         e *= sign;
 400
 401                         if(exp<0 && e<0 && e+exp>0) exp = INT_MIN;
 402                         else if(exp>0 && e>0 && e+exp<0) exp = INT_MAX;
 403                         else exp += e;
 404                     }
 405
 406                     fpcontrol = _control87(0, 0);
 407                     _control87(MSVCRT__EM_DENORMAL|MSVCRT__EM_INVALID|MSVCRT__EM_ZERODIVIDE
 408                             |MSVCRT__EM_OVERFLOW|MSVCRT__EM_UNDERFLOW|MSVCRT__EM_INEXACT, 0xffffffff);
 409
 410                     negexp = (exp < 0);
 411                     if(negexp)
 412                         exp = -exp;
 413                     /* update 'cur' with this exponent. */
 414                     while(exp) {
 415                         if(exp & 1)
 416                             cur *= expcnt;
 417                         exp /= 2;
 418                         expcnt = expcnt*expcnt;
 419                     }
 420                     cur = (negexp ? d/cur : d*cur);
 421
 422                     _control87(fpcontrol, 0xffffffff);
 423
 424                     st = 1;
 425                     if (!suppress) {
 426                         if (L_prefix || l_prefix) _SET_NUMBER_(double);
 427                         else _SET_NUMBER_(float);
 428                     }
 429                 }
 430                 break;
 431                 /* According to msdn,
 432                  * 's' reads a character string in a call to fscanf
 433                  * and 'S' a wide character string and vice versa in a
 434                  * call to fwscanf. The 'h', 'w' and 'l' prefixes override
 435                  * this behaviour. 'h' forces reading char * but 'l' and 'w'
 436                  * force reading WCHAR. */
 437             case 's':
 438                     if (w_prefix || l_prefix) goto widecharstring;
 439                     else if (h_prefix) goto charstring;
 440 #ifdef WIDE_SCANF
 441                     else goto widecharstring;
 442 #else /* WIDE_SCANF */
 443                     else goto charstring;
 444 #endif /* WIDE_SCANF */
 445             case 'S':
 446                     if (w_prefix || l_prefix) goto widecharstring;
 447                     else if (h_prefix) goto charstring;
 448 #ifdef WIDE_SCANF
 449                     else goto charstring;
 450 #else /* WIDE_SCANF */
 451                     else goto widecharstring;
 452 #endif /* WIDE_SCANF */
 453             charstring: { /* read a word into a char */
 454                     char *sptr = suppress ? NULL : va_arg(ap, char*);
 455                     char *sptr_beg = sptr;
 456 #ifdef SECURE
 457                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 458 #else
 459                     unsigned size = UINT_MAX;
 460 #endif
 461                     /* skip initial whitespace */
 462                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 463                         nch = _GETC_(file);
 464                     /* read until whitespace */
 465                     while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
 466                         if (!suppress) {
 467                             *sptr++ = _CHAR2SUPPORTED_(nch);
 468                             if(size>1) size--;
 469                             else {
 470                                 _UNLOCK_FILE_(file);
 471                                 *sptr_beg = 0;
 472                                 return rd;
 473                             }
 474                         }
 475                         st++;
 476                         nch = _GETC_(file);
 477                         if (width>0) width--;
 478                     }
 479                     /* terminate */
 480                     if (st && !suppress) *sptr = 0;
 481                 }
 482                 break;
 483             widecharstring: { /* read a word into a wchar_t* */
 484                     MSVCRT_wchar_t *sptr = suppress ? NULL : va_arg(ap, MSVCRT_wchar_t*);
 485                     MSVCRT_wchar_t *sptr_beg = sptr;
 486 #ifdef SECURE
 487                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned);
 488 #else
 489                     unsigned size = UINT_MAX;
 490 #endif
 491                     /* skip initial whitespace */
 492                     while ((nch!=_EOF_) && _ISSPACE_(nch))
 493                         nch = _GETC_(file);
 494                     /* read until whitespace */
 495                     while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) {
 496                         if (!suppress) {
 497                             *sptr++ = _WIDE2SUPPORTED_(nch);
 498                             if(size>1) size--;
 499                             else {
 500                                 _UNLOCK_FILE_(file);
 501                                 *sptr_beg = 0;
 502                                 return rd;
 503                             }
 504                         }
 505                         st++;
 506                         nch = _GETC_(file);
 507                         if (width>0) width--;
 508                     }
 509                     /* terminate */
 510                     if (st && !suppress) *sptr = 0;
 511                 }
 512                 break;
 513             /* 'c' and 'C work analogously to 's' and 'S' as described
 514              * above */
 515             case 'c':
 516                     if (w_prefix || l_prefix) goto widecharacter;
 517                     else if (h_prefix) goto character;
 518 #ifdef WIDE_SCANF
 519                     else goto widecharacter;
 520 #else /* WIDE_SCANF */
 521                     else goto character;
 522 #endif /* WIDE_SCANF */
 523             case 'C':
 524                     if (w_prefix || l_prefix) goto widecharacter;
 525                     else if (h_prefix) goto character;
 526 #ifdef WIDE_SCANF
 527                     else goto character;
 528 #else /* WIDE_SCANF */
 529                     else goto widecharacter;
 530 #endif /* WIDE_SCANF */
 531           character: { /* read single character into char */
 532                     char *str = suppress ? NULL : va_arg(ap, char*);
 533                     char *pstr = str;
 534 #ifdef SECURE
 535                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned)/sizeof(char);
 536 #else
 537                     unsigned size = UINT_MAX;
 538 #endif
 539                     if (width == -1) width = 1;
 540                     while (width && (nch != _EOF_))
 541                     {
 542                         if (!suppress) {
 543                             *str++ = _CHAR2SUPPORTED_(nch);
 544                             if(size) size--;
 545                             else {
 546                                 _UNLOCK_FILE_(file);
 547                                 *pstr = 0;
 548                                 return rd;
 549                             }
 550                         }
 551                         st++;
 552                         width--;
 553                         nch = _GETC_(file);
 554                     }
 555                 }
 556                 break;
 557           widecharacter: { /* read single character into a wchar_t */
 558                     MSVCRT_wchar_t *str = suppress ? NULL : va_arg(ap, MSVCRT_wchar_t*);
 559                     MSVCRT_wchar_t *pstr = str;
 560 #ifdef SECURE
 561                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned)/sizeof(MSVCRT_wchar_t);
 562 #else
 563                     unsigned size = UINT_MAX;
 564 #endif
 565                     if (width == -1) width = 1;
 566                     while (width && (nch != _EOF_))
 567                     {
 568                         if (!suppress) {
 569                             *str++ = _WIDE2SUPPORTED_(nch);
 570                             if(size) size--;
 571                             else {
 572                                 _UNLOCK_FILE_(file);
 573                                 *pstr = 0;
 574                                 return rd;
 575                             }
 576                         }
 577                         st++;
 578                         width--;
 579                         nch = _GETC_(file);
 580                     }
 581                 }
 582                 break;
 583             case 'n': {
 584                     if (!suppress) {
 585                         int*n = va_arg(ap, int*);
 586                         *n = consumed - 1;
 587                     }
 588                     /* This is an odd one: according to the standard,
 589                      * "Execution of a %n directive does not increment the
 590                      * assignment count returned at the completion of
 591                      * execution" even if it wasn't suppressed with the
 592                      * '*' flag.  The Corrigendum to the standard seems
 593                      * to contradict this (comment out the assignment to
 594                      * suppress below if you want to implement these
 595                      * alternate semantics) but the windows program I'm
 596                      * looking at expects the behavior I've coded here
 597                      * (which happens to be what glibc does as well).
 598                      */
 599                     suppress = 1;
 600                     st = 1;
 601                 }
 602                 break;
 603             case '[': {
 604                     _CHAR_ *str = suppress ? NULL : va_arg(ap, _CHAR_*);
 605                     _CHAR_ *sptr = str;
 606                     RTL_BITMAP bitMask;
 607                     ULONG *Mask;
 608                     int invert = 0; /* Set if we are NOT to find the chars */
 609 #ifdef SECURE
 610                     unsigned size = suppress ? UINT_MAX : va_arg(ap, unsigned)/sizeof(_CHAR_);
 611 #else
 612                     unsigned size = UINT_MAX;
 613 #endif
 614
 615                     /* Init our bitmap */
 616                     Mask = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, _BITMAPSIZE_/8);
 617                     RtlInitializeBitMap(&bitMask, Mask, _BITMAPSIZE_);
 618
 619                     /* Read the format */
 620                     format++;
 621                     if(*format == '^') {
 622                         invert = 1;
 623                         format++;
 624                     }
 625                     if(*format == ']') {
 626                         RtlSetBits(&bitMask, ']', 1);
 627                         format++;
 628                     }
 629                     while(*format && (*format != ']')) {
 630                         /* According to msdn:
 631                          * "Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]." */
 632                         if((*format == '-') && (*(format + 1) != ']')) {
 633                             if ((*(format - 1)) < *(format + 1))
 634                                 RtlSetBits(&bitMask, *(format - 1) +1 , *(format + 1) - *(format - 1));
 635                             else
 636                                 RtlSetBits(&bitMask, *(format + 1)    , *(format - 1) - *(format + 1));
 637                             format++;
 638                         } else
 639                             RtlSetBits(&bitMask, *format, 1);
 640                         format++;
 641                     }
 642                     /* read until char is not suitable */
 643                     while ((width != 0) && (nch != _EOF_)) {
 644                         if(!invert) {
 645                             if(RtlAreBitsSet(&bitMask, nch, 1)) {
 646                                 if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch);
 647                             } else
 648                                 break;
 649                         } else {
 650                             if(RtlAreBitsClear(&bitMask, nch, 1)) {
 651                                 if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch);
 652                             } else
 653                                 break;
 654                         }
 655                         st++;
 656                         nch = _GETC_(file);
 657                         if (width>0) width--;
 658                         if(size>1) size--;
 659                         else {
 660                             _UNLOCK_FILE_(file);
 661                             *str = 0;
 662                             return rd;
 663                         }
 664                     }
 665                     /* terminate */
 666                     if (!suppress) *sptr = 0;
 667                     HeapFree(GetProcessHeap(), 0, Mask);
 668                 }
 669                 break;
 670             default:
 671                 /* From spec: "if a percent sign is followed by a character
 672                  * that has no meaning as a format-control character, that
 673                  * character and the following characters are treated as
 674                  * an ordinary sequence of characters, that is, a sequence
 675                  * of characters that must match the input.  For example,
 676                  * to specify that a percent-sign character is to be input,
 677                  * use %%." */
 678                 while ((nch!=_EOF_) && _ISSPACE_(nch))
 679                     nch = _GETC_(file);
 680                 if (nch==*format) {
 681                     suppress = 1; /* whoops no field to be read */
 682                     st = 1; /* but we got what we expected */
 683                     nch = _GETC_(file);
 684                 }
 685                 break;
 686             }
 687             if (st && !suppress) rd++;
 688             else if (!st) break;
 689         }
 690         /* a non-white-space character causes scanf to read, but not store,
 691          * a matching non-white-space character. */
 692         else {
 693             /* check for character match */
 694             if (nch == *format) {
 695                 nch = _GETC_(file);
 696             } else break;
 697         }
 698         format++;
 699     }
 700     if (nch!=_EOF_) {
 701         _UNGETC_(nch, file);
 702     }
 703
 704     TRACE("returning %d\n", rd);
 705     _UNLOCK_FILE_(file);
 706     return rd;
 707 }
 708
 709 #undef _CHAR_
 710 #undef _EOF_
 711 #undef _EOF_RET
 712 #undef _ISSPACE_
 713 #undef _ISDIGIT_
 714 #undef _CHAR2SUPPORTED_
 715 #undef _WIDE2SUPPORTED_
 716 #undef _CHAR2DIGIT_
 717 #undef _GETC_
 718 #undef _UNGETC_
 719 #undef _LOCK_FILE_
 720 #undef _UNLOCK_FILE_
 721 #undef _FUNCTION_
 722 #undef _BITMAPSIZE_