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