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