dlls/ntdll/wcstring.c

   1 /*
   2  * NTDLL wide-char functions
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  * Copyright 2000 Jon Griffiths
   6  * Copyright 2003 Thomas Mertes
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24
  25 #include <ctype.h>
  26 #include <limits.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #include "windef.h"
  33 #include "winternl.h"
  34 #include "wine/unicode.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  38
  39
  40 /*********************************************************************
  41  *           _wcsicmp    (NTDLL.@)
  42  */
  43 INT __cdecl NTDLL__wcsicmp( LPCWSTR str1, LPCWSTR str2 )
  44 {
  45     return strcmpiW( str1, str2 );
  46 }
  47
  48
  49 /*********************************************************************
  50  *           _wcslwr    (NTDLL.@)
  51  */
  52 LPWSTR __cdecl NTDLL__wcslwr( LPWSTR str )
  53 {
  54     return strlwrW( str );
  55 }
  56
  57
  58 /*********************************************************************
  59  *           _wcsnicmp    (NTDLL.@)
  60  */
  61 INT __cdecl NTDLL__wcsnicmp( LPCWSTR str1, LPCWSTR str2, INT n )
  62 {
  63     return strncmpiW( str1, str2, n );
  64 }
  65
  66
  67 /*********************************************************************
  68  *           _wcsupr    (NTDLL.@)
  69  */
  70 LPWSTR __cdecl NTDLL__wcsupr( LPWSTR str )
  71 {
  72     return struprW( str );
  73 }
  74
  75
  76 /*********************************************************************
  77  *           towlower    (NTDLL.@)
  78  */
  79 WCHAR __cdecl NTDLL_towlower( WCHAR ch )
  80 {
  81     return tolowerW(ch);
  82 }
  83
  84
  85 /*********************************************************************
  86  *           towupper    (NTDLL.@)
  87  */
  88 WCHAR __cdecl NTDLL_towupper( WCHAR ch )
  89 {
  90     return toupperW(ch);
  91 }
  92
  93
  94 /***********************************************************************
  95  *           wcscat    (NTDLL.@)
  96  */
  97 LPWSTR __cdecl NTDLL_wcscat( LPWSTR dst, LPCWSTR src )
  98 {
  99     return strcatW( dst, src );
 100 }
 101
 102
 103 /*********************************************************************
 104  *           wcschr    (NTDLL.@)
 105  */
 106 LPWSTR __cdecl NTDLL_wcschr( LPCWSTR str, WCHAR ch )
 107 {
 108     return strchrW( str, ch );
 109 }
 110
 111
 112 /*********************************************************************
 113  *           wcscmp    (NTDLL.@)
 114  */
 115 INT __cdecl NTDLL_wcscmp( LPCWSTR str1, LPCWSTR str2 )
 116 {
 117     return strcmpW( str1, str2 );
 118 }
 119
 120
 121 /***********************************************************************
 122  *           wcscpy    (NTDLL.@)
 123  */
 124 LPWSTR __cdecl NTDLL_wcscpy( LPWSTR dst, LPCWSTR src )
 125 {
 126     return strcpyW( dst, src );
 127 }
 128
 129
 130 /*********************************************************************
 131  *           wcscspn    (NTDLL.@)
 132  */
 133 INT __cdecl NTDLL_wcscspn( LPCWSTR str, LPCWSTR reject )
 134 {
 135     return strcspnW( str, reject );
 136 }
 137
 138
 139 /***********************************************************************
 140  *           wcslen    (NTDLL.@)
 141  */
 142 INT __cdecl NTDLL_wcslen( LPCWSTR str )
 143 {
 144     return strlenW( str );
 145 }
 146
 147
 148 /*********************************************************************
 149  *           wcsncat    (NTDLL.@)
 150  */
 151 LPWSTR __cdecl NTDLL_wcsncat( LPWSTR s1, LPCWSTR s2, INT n )
 152 {
 153     LPWSTR ret = s1;
 154     while (*s1) s1++;
 155     while (n-- > 0) if (!(*s1++ = *s2++)) return ret;
 156     *s1 = 0;
 157     return ret;
 158 }
 159
 160
 161 /*********************************************************************
 162  *           wcsncmp    (NTDLL.@)
 163  */
 164 INT __cdecl NTDLL_wcsncmp( LPCWSTR str1, LPCWSTR str2, INT n )
 165 {
 166     return strncmpW( str1, str2, n );
 167 }
 168
 169
 170 /*********************************************************************
 171  *           wcsncpy    (NTDLL.@)
 172  */
 173 LPWSTR __cdecl NTDLL_wcsncpy( LPWSTR s1, LPCWSTR s2, INT n )
 174 {
 175     WCHAR *ret = s1;
 176     while (n-- > 0) if (!(*s1++ = *s2++)) break;
 177     while (n-- > 0) *s1++ = 0;
 178     return ret;
 179 }
 180
 181
 182 /*********************************************************************
 183  *           wcspbrk    (NTDLL.@)
 184  */
 185 LPWSTR __cdecl NTDLL_wcspbrk( LPCWSTR str, LPCWSTR accept )
 186 {
 187     return strpbrkW( str, accept );
 188 }
 189
 190
 191 /*********************************************************************
 192  *           wcsrchr    (NTDLL.@)
 193  */
 194 LPWSTR __cdecl NTDLL_wcsrchr( LPWSTR str, WCHAR ch )
 195 {
 196     return strrchrW( str, ch );
 197 }
 198
 199
 200 /*********************************************************************
 201  *           wcsspn    (NTDLL.@)
 202  */
 203 INT __cdecl NTDLL_wcsspn( LPCWSTR str, LPCWSTR accept )
 204 {
 205     return strspnW( str, accept );
 206 }
 207
 208
 209 /*********************************************************************
 210  *           wcsstr    (NTDLL.@)
 211  */
 212 LPWSTR __cdecl NTDLL_wcsstr( LPCWSTR str, LPCWSTR sub )
 213 {
 214     return strstrW( str, sub );
 215 }
 216
 217
 218 /*********************************************************************
 219  *           wcstok    (NTDLL.@)
 220  */
 221 LPWSTR __cdecl NTDLL_wcstok( LPWSTR str, LPCWSTR delim )
 222 {
 223     static LPWSTR next = NULL;
 224     LPWSTR ret;
 225
 226     if (!str)
 227         if (!(str = next)) return NULL;
 228
 229     while (*str && NTDLL_wcschr( delim, *str )) str++;
 230     if (!*str) return NULL;
 231     ret = str++;
 232     while (*str && !NTDLL_wcschr( delim, *str )) str++;
 233     if (*str) *str++ = 0;
 234     next = str;
 235     return ret;
 236 }
 237
 238
 239 /*********************************************************************
 240  *           wcstombs    (NTDLL.@)
 241  */
 242 INT __cdecl NTDLL_wcstombs( LPSTR dst, LPCWSTR src, INT n )
 243 {
 244     DWORD len;
 245
 246     if (!dst)
 247     {
 248         RtlUnicodeToMultiByteSize( &len, src, strlenW(src)*sizeof(WCHAR) );
 249         return len;
 250     }
 251     else
 252     {
 253         if (n <= 0) return 0;
 254         RtlUnicodeToMultiByteN( dst, n, &len, src, strlenW(src)*sizeof(WCHAR) );
 255         if (len < n) dst[len] = 0;
 256     }
 257     return len;
 258 }
 259
 260
 261 /*********************************************************************
 262  *           mbstowcs    (NTDLL.@)
 263  */
 264 INT __cdecl NTDLL_mbstowcs( LPWSTR dst, LPCSTR src, INT n )
 265 {
 266     DWORD len;
 267
 268     if (!dst)
 269     {
 270         RtlMultiByteToUnicodeSize( &len, src, strlen(src) );
 271     }
 272     else
 273     {
 274         if (n <= 0) return 0;
 275         RtlMultiByteToUnicodeN( dst, n*sizeof(WCHAR), &len, src, strlen(src) );
 276         if (len / sizeof(WCHAR) < n) dst[len / sizeof(WCHAR)] = 0;
 277     }
 278     return len / sizeof(WCHAR);
 279 }
 280
 281
 282 /*********************************************************************
 283  *                  wcstol  (NTDLL.@)
 284  */
 285 long __cdecl NTDLL_wcstol(LPCWSTR s,LPWSTR *end,INT base)
 286 {
 287     return strtolW( s, end, base );
 288 }
 289
 290
 291 /*********************************************************************
 292  *                  wcstoul  (NTDLL.@)
 293  */
 294 unsigned long __cdecl NTDLL_wcstoul(LPCWSTR s,LPWSTR *end,INT base)
 295 {
 296     return strtoulW( s, end, base );
 297 }
 298
 299
 300 /*********************************************************************
 301  *           iswctype    (NTDLL.@)
 302  */
 303 INT __cdecl NTDLL_iswctype( WCHAR wc, WCHAR wct )
 304 {
 305     return (get_char_typeW(wc) & 0xfff) & wct;
 306 }
 307
 308
 309 /*********************************************************************
 310  *           iswalpha    (NTDLL.@)
 311  *
 312  * Checks if an unicode char wc is a letter
 313  *
 314  * RETURNS
 315  *  TRUE: The unicode char wc is a letter.
 316  *  FALSE: Otherwise
 317  */
 318 INT __cdecl NTDLL_iswalpha( WCHAR wc )
 319 {
 320     return isalphaW(wc);
 321 }
 322
 323
 324 /*********************************************************************
 325  *              iswdigit (NTDLL.@)
 326  *
 327  * Checks if an unicode char wc is a digit
 328  *
 329  * RETURNS
 330  *  TRUE: The unicode char wc is a digit.
 331  *  FALSE: Otherwise
 332  */
 333 INT __cdecl NTDLL_iswdigit( WCHAR wc )
 334 {
 335     return isdigitW(wc);
 336 }
 337
 338
 339 /*********************************************************************
 340  *              iswlower (NTDLL.@)
 341  *
 342  * Checks if an unicode char wc is a lower case letter
 343  *
 344  * RETURNS
 345  *  TRUE: The unicode char wc is a lower case letter.
 346  *  FALSE: Otherwise
 347  */
 348 INT __cdecl NTDLL_iswlower( WCHAR wc )
 349 {
 350     return islowerW(wc);
 351 }
 352
 353
 354 /*********************************************************************
 355  *              iswspace (NTDLL.@)
 356  *
 357  * Checks if an unicode char wc is a white space character
 358  *
 359  * RETURNS
 360  *  TRUE: The unicode char wc is a white space character.
 361  *  FALSE: Otherwise
 362  */
 363 INT __cdecl NTDLL_iswspace( WCHAR wc )
 364 {
 365     return isspaceW(wc);
 366 }
 367
 368
 369 /*********************************************************************
 370  *              iswxdigit (NTDLL.@)
 371  *
 372  * Checks if an unicode char wc is an extended digit
 373  *
 374  * RETURNS
 375  *  TRUE: The unicode char wc is an extended digit.
 376  *  FALSE: Otherwise
 377  */
 378 INT __cdecl NTDLL_iswxdigit( WCHAR wc )
 379 {
 380     return isxdigitW(wc);
 381 }
 382
 383
 384 /*********************************************************************
 385  *      _ultow   (NTDLL.@)
 386  *
 387  * Converts an unsigned long integer to an unicode string.
 388  *
 389  * RETURNS
 390  *  Always returns str.
 391  *
 392  * NOTES
 393  *  Converts value to a '\0' terminated wstring which is copied to str.
 394  *  The maximum length of the copied str is 33 bytes.
 395  *  Does not check if radix is in the range of 2 to 36.
 396  *  If str is NULL it just returns NULL.
 397  */
 398 LPWSTR __cdecl _ultow(
 399     unsigned long value, /* [I] Value to be converted */
 400     LPWSTR str,          /* [O] Destination for the converted value */
 401     INT radix)           /* [I] Number base for conversion */
 402 {
 403     WCHAR buffer[33];
 404     PWCHAR pos;
 405     WCHAR digit;
 406
 407     pos = &buffer[32];
 408     *pos = '\0';
 409
 410     do {
 411         digit = value % radix;
 412         value = value / radix;
 413         if (digit < 10) {
 414             *--pos = '0' + digit;
 415         } else {
 416             *--pos = 'a' + digit - 10;
 417         } /* if */
 418     } while (value != 0L);
 419
 420     if (str != NULL) {
 421         memcpy(str, pos, (&buffer[32] - pos + 1) * sizeof(WCHAR));
 422     } /* if */
 423     return str;
 424 }
 425
 426
 427 /*********************************************************************
 428  *      _ltow   (NTDLL.@)
 429  *
 430  * Converts a long integer to an unicode string.
 431  *
 432  * RETURNS
 433  *  Always returns str.
 434  *
 435  * NOTES
 436  *  Converts value to a '\0' terminated wstring which is copied to str.
 437  *  The maximum length of the copied str is 33 bytes. If radix
 438  *  is 10 and value is negative, the value is converted with sign.
 439  *  Does not check if radix is in the range of 2 to 36.
 440  *  If str is NULL it just returns NULL.
 441  */
 442 LPWSTR __cdecl _ltow(
 443     long value, /* [I] Value to be converted */
 444     LPWSTR str, /* [O] Destination for the converted value */
 445     INT radix)  /* [I] Number base for conversion */
 446 {
 447     unsigned long val;
 448     int negative;
 449     WCHAR buffer[33];
 450     PWCHAR pos;
 451     WCHAR digit;
 452
 453     if (value < 0 && radix == 10) {
 454         negative = 1;
 455         val = -value;
 456     } else {
 457         negative = 0;
 458         val = value;
 459     } /* if */
 460
 461     pos = &buffer[32];
 462     *pos = '\0';
 463
 464     do {
 465         digit = val % radix;
 466         val = val / radix;
 467         if (digit < 10) {
 468             *--pos = '0' + digit;
 469         } else {
 470             *--pos = 'a' + digit - 10;
 471         } /* if */
 472     } while (val != 0L);
 473
 474     if (negative) {
 475         *--pos = '-';
 476     } /* if */
 477
 478     if (str != NULL) {
 479         memcpy(str, pos, (&buffer[32] - pos + 1) * sizeof(WCHAR));
 480     } /* if */
 481     return str;
 482 }
 483
 484
 485 /*********************************************************************
 486  *      _itow    (NTDLL.@)
 487  *
 488  * Converts an integer to an unicode string.
 489  *
 490  * RETURNS
 491  *  Always returns str.
 492  *
 493  * NOTES
 494  *  Converts value to a '\0' terminated wstring which is copied to str.
 495  *  The maximum length of the copied str is 33 bytes. If radix
 496  *  is 10 and value is negative, the value is converted with sign.
 497  *  Does not check if radix is in the range of 2 to 36.
 498  *  If str is NULL it just returns NULL.
 499  *
 500  * DIFFERENCES
 501  * - The native function crashes when the string is longer than 19 chars.
 502  *   This function does not have this bug.
 503  */
 504 LPWSTR __cdecl _itow(
 505     int value,  /* [I] Value to be converted */
 506     LPWSTR str, /* [O] Destination for the converted value */
 507     INT radix)  /* [I] Number base for conversion */
 508 {
 509     return _ltow(value, str, radix);
 510 }
 511
 512
 513 /*********************************************************************
 514  *      _ui64tow   (NTDLL.@)
 515  *
 516  * Converts a large unsigned integer to an unicode string.
 517  *
 518  * RETURNS
 519  *  Always returns str.
 520  *
 521  * NOTES
 522  *  Converts value to a '\0' terminated wstring which is copied to str.
 523  *  The maximum length of the copied str is 33 bytes.
 524  *  Does not check if radix is in the range of 2 to 36.
 525  *  If str is NULL it just returns NULL.
 526  *
 527  * DIFFERENCES
 528  * - This function does not exist in the native DLL (but in msvcrt).
 529  *   But since the maintenance of all these functions is better done
 530  *   in one place we implement it here.
 531  */
 532 LPWSTR __cdecl _ui64tow(
 533     ULONGLONG value, /* [I] Value to be converted */
 534     LPWSTR str,      /* [O] Destination for the converted value */
 535     INT radix)       /* [I] Number base for conversion */
 536 {
 537     WCHAR buffer[65];
 538     PWCHAR pos;
 539     WCHAR digit;
 540
 541     pos = &buffer[64];
 542     *pos = '\0';
 543
 544     do {
 545         digit = value % radix;
 546         value = value / radix;
 547         if (digit < 10) {
 548             *--pos = '0' + digit;
 549         } else {
 550             *--pos = 'a' + digit - 10;
 551         } /* if */
 552     } while (value != 0L);
 553
 554     if (str != NULL) {
 555         memcpy(str, pos, (&buffer[64] - pos + 1) * sizeof(WCHAR));
 556     } /* if */
 557     return str;
 558 }
 559
 560
 561 /*********************************************************************
 562  *      _i64tow   (NTDLL.@)
 563  *
 564  * Converts a large integer to an unicode string.
 565  *
 566  * RETURNS
 567  *  Always returns str.
 568  *
 569  * NOTES
 570  *  Converts value to a '\0' terminated wstring which is copied to str.
 571  *  The maximum length of the copied str is 33 bytes. If radix
 572  *  is 10 and value is negative, the value is converted with sign.
 573  *  Does not check if radix is in the range of 2 to 36.
 574  *  If str is NULL it just returns NULL.
 575  *
 576  * DIFFERENCES
 577  * - The native DLL converts negative values (for base 10) wrong:
 578  *                     -1 is converted to -18446744073709551615
 579  *                     -2 is converted to -18446744073709551614
 580  *   -9223372036854775807 is converted to  -9223372036854775809
 581  *   -9223372036854775808 is converted to  -9223372036854775808
 582  *   The native msvcrt _i64tow function and our ntdll function do
 583  *   not have this bug.
 584  */
 585 LPWSTR __cdecl _i64tow(
 586     LONGLONG value, /* [I] Value to be converted */
 587     LPWSTR str,     /* [O] Destination for the converted value */
 588     INT radix)      /* [I] Number base for conversion */
 589 {
 590     ULONGLONG val;
 591     int negative;
 592     WCHAR buffer[65];
 593     PWCHAR pos;
 594     WCHAR digit;
 595
 596     if (value < 0 && radix == 10) {
 597         negative = 1;
 598         val = -value;
 599     } else {
 600         negative = 0;
 601         val = value;
 602     } /* if */
 603
 604     pos = &buffer[64];
 605     *pos = '\0';
 606
 607     do {
 608         digit = val % radix;
 609         val = val / radix;
 610         if (digit < 10) {
 611             *--pos = '0' + digit;
 612         } else {
 613             *--pos = 'a' + digit - 10;
 614         } /* if */
 615     } while (val != 0L);
 616
 617     if (negative) {
 618         *--pos = '-';
 619     } /* if */
 620
 621     if (str != NULL) {
 622         memcpy(str, pos, (&buffer[64] - pos + 1) * sizeof(WCHAR));
 623     } /* if */
 624     return str;
 625 }
 626
 627
 628 /*********************************************************************
 629  *      _wtol    (NTDLL.@)
 630  *
 631  * Converts an unicode string to a long integer.
 632  *
 633  * PARAMS
 634  *  str [I] Wstring to be converted
 635  *
 636  * RETURNS
 637  *  On success it returns the integer value otherwise it returns 0.
 638  *
 639  * NOTES
 640  *  Accepts: {whitespace} [+|-] {digits}
 641  *  No check is made for value overflow, only the lower 32 bits are assigned.
 642  *  If str is NULL it crashes, as the native function does.
 643  */
 644 LONG __cdecl _wtol( LPCWSTR str )
 645 {
 646     ULONG RunningTotal = 0;
 647     char bMinus = 0;
 648
 649     while (isspaceW(*str)) {
 650         str++;
 651     } /* while */
 652
 653     if (*str == '+') {
 654         str++;
 655     } else if (*str == '-') {
 656         bMinus = 1;
 657         str++;
 658     } /* if */
 659
 660     while (*str >= '0' && *str <= '9') {
 661         RunningTotal = RunningTotal * 10 + *str - '0';
 662         str++;
 663     } /* while */
 664
 665     return bMinus ? -RunningTotal : RunningTotal;
 666 }
 667
 668
 669 /*********************************************************************
 670  *      _wtoi    (NTDLL.@)
 671  *
 672  * Converts an unicode string to an integer.
 673  *
 674  * PARAMS
 675  *  str [I] Wstring to be converted
 676  *
 677  * RETURNS
 678  *  On success it returns the integer value otherwise it returns 0.
 679  *
 680  * NOTES
 681  *  Accepts: {whitespace} [+|-] {digits}
 682  *  No check is made for value overflow, only the lower 32 bits are assigned.
 683  *  If str is NULL it crashes, as the native function does.
 684  */
 685 int __cdecl _wtoi( LPCWSTR str )
 686 {
 687     return _wtol(str);
 688 }
 689
 690
 691 /*********************************************************************
 692  *      _wtoi64   (NTDLL.@)
 693  *
 694  * Converts an unicode string to a large integer.
 695  *
 696  * PARAMS
 697  *  str [I] Wstring to be converted
 698  *
 699  * RETURNS
 700  *  On success it returns the integer value otherwise it returns 0.
 701  *
 702  * NOTES
 703  *  Accepts: {whitespace} [+|-] {digits}
 704  *  No check is made for value overflow, only the lower 64 bits are assigned.
 705  *  If str is NULL it crashes, as the native function does.
 706  */
 707 LONGLONG  __cdecl _wtoi64( LPCWSTR str )
 708 {
 709     ULONGLONG RunningTotal = 0;
 710     char bMinus = 0;
 711
 712     while (isspaceW(*str)) {
 713         str++;
 714     } /* while */
 715
 716     if (*str == '+') {
 717         str++;
 718     } else if (*str == '-') {
 719         bMinus = 1;
 720         str++;
 721     } /* if */
 722
 723     while (*str >= '0' && *str <= '9') {
 724         RunningTotal = RunningTotal * 10 + *str - '0';
 725         str++;
 726     } /* while */
 727
 728     return bMinus ? -RunningTotal : RunningTotal;
 729 }
 730
 731
 732 /***********************************************************************
 733  *        _snwprintf (NTDLL.@)
 734  */
 735 int __cdecl _snwprintf(WCHAR *str, unsigned int len, const WCHAR *format, ...)
 736 {
 737   int retval;
 738   va_list valist;
 739   va_start(valist, format);
 740   retval = vsnprintfW(str, len, format, valist);
 741   va_end(valist);
 742   return retval;
 743 }
 744
 745
 746 /***********************************************************************
 747  *        swprintf (NTDLL.@)
 748  */
 749 int __cdecl NTDLL_swprintf(WCHAR *str, const WCHAR *format, ...)
 750 {
 751   int retval;
 752   va_list valist;
 753   va_start(valist, format);
 754   retval = vsnprintfW(str, INT_MAX, format, valist);
 755   va_end(valist);
 756   return retval;
 757 }
 758
 759
 760 /***********************************************************************
 761  *        _vsnwprintf (NTDLL.@)
 762  */
 763 int __cdecl _vsnwprintf( WCHAR *str, unsigned int len, const WCHAR *format, va_list args )
 764 {
 765   return vsnprintfW( str, len, format, args );
 766 }