memory/string.c

   1 /*
   2  * String functions
   3  *
   4  * Copyright 1993 Yngvi Sigurjonsson
   5  * Copyright 1996 Alexandre Julliard
   6  */
   7
   8 #include <ctype.h>
   9 #include <string.h>
  10
  11 #include "windef.h"
  12 #include "winbase.h"
  13 #include "wingdi.h"
  14 #include "winuser.h"
  15 #include "wine/winbase16.h"
  16 #include "wine/winuser16.h"
  17 #include "wine/keyboard16.h"
  18 #include "wine/exception.h"
  19 #include "winerror.h"
  20 #include "crtdll.h"
  21 #include "ldt.h"
  22 #include "debugtools.h"
  23 #include "winnls.h"
  24
  25 DEFAULT_DEBUG_CHANNEL(string)
  26
  27 static const BYTE STRING_Oem2Ansi[256] =
  28 "\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\244"
  29 "\020\021\022\023\266\247\026\027\030\031\032\033\034\035\036\037"
  30 "\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057"
  31 "\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077"
  32 "\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117"
  33 "\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137"
  34 "\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157"
  35 "\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177"
  36 "\307\374\351\342\344\340\345\347\352\353\350\357\356\354\304\305"
  37 "\311\346\306\364\366\362\373\371\377\326\334\242\243\245\120\203"
  38 "\341\355\363\372\361\321\252\272\277\137\254\275\274\241\253\273"
  39 "\137\137\137\246\246\246\246\053\053\246\246\053\053\053\053\053"
  40 "\053\055\055\053\055\053\246\246\053\053\055\055\246\055\053\055"
  41 "\055\055\055\053\053\053\053\053\053\053\053\137\137\246\137\137"
  42 "\137\337\137\266\137\137\265\137\137\137\137\137\137\137\137\137"
  43 "\137\261\137\137\137\137\367\137\260\225\267\137\156\262\137\137";
  44
  45 static const BYTE STRING_Ansi2Oem[256] =
  46 "\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017"
  47 "\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037"
  48 "\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057"
  49 "\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077"
  50 "\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117"
  51 "\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137"
  52 "\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157"
  53 "\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177"
  54 "\200\201\054\237\054\137\375\374\210\045\123\074\117\215\216\217"
  55 "\220\140\047\042\042\371\055\137\230\231\163\076\157\235\236\131"
  56 "\040\255\233\234\017\235\335\025\042\143\246\256\252\055\162\137"
  57 "\370\361\375\063\047\346\024\372\054\061\247\257\254\253\137\250"
  58 "\101\101\101\101\216\217\222\200\105\220\105\105\111\111\111\111"
  59 "\104\245\117\117\117\117\231\170\117\125\125\125\232\131\137\341"
  60 "\205\240\203\141\204\206\221\207\212\202\210\211\215\241\214\213"
  61 "\144\244\225\242\223\157\224\366\157\227\243\226\201\171\137\230";
  62
  63 #define OEM_TO_ANSI(ch) (STRING_Oem2Ansi[(unsigned char)(ch)])
  64 #define ANSI_TO_OEM(ch) (STRING_Ansi2Oem[(unsigned char)(ch)])
  65
  66 /* Internaly used by strchr family functions */
  67 static BOOL ChrCmpA( WORD word1, WORD word2);
  68
  69
  70 /* filter for page-fault exceptions */
  71 static WINE_EXCEPTION_FILTER(page_fault)
  72 {
  73     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
  74         return EXCEPTION_EXECUTE_HANDLER;
  75     return EXCEPTION_CONTINUE_SEARCH;
  76 }
  77
  78
  79 /***********************************************************************
  80  *           hmemcpy   (KERNEL.348)
  81  */
  82 void WINAPI hmemcpy16( LPVOID dst, LPCVOID src, LONG count )
  83 {
  84     memcpy( dst, src, count );
  85 }
  86
  87
  88 /***********************************************************************
  89  *           lstrcat16   (KERNEL.89)
  90  */
  91 SEGPTR WINAPI lstrcat16( SEGPTR dst, LPCSTR src )
  92 {
  93     /* Windows does not check for NULL pointers here, so we don't either */
  94     strcat( (LPSTR)PTR_SEG_TO_LIN(dst), src );
  95     return dst;
  96 }
  97
  98
  99 /***********************************************************************
 100  *           lstrcatA   (KERNEL32.599)
 101  */
 102 LPSTR WINAPI lstrcatA( LPSTR dst, LPCSTR src )
 103 {
 104     __TRY
 105     {
 106         strcat( dst, src );
 107     }
 108     __EXCEPT(page_fault)
 109     {
 110         SetLastError( ERROR_INVALID_PARAMETER );
 111         return NULL;
 112     }
 113     __ENDTRY
 114     return dst;
 115 }
 116
 117
 118 /***********************************************************************
 119  *           lstrcatW   (KERNEL32.600)
 120  */
 121 LPWSTR WINAPI lstrcatW( LPWSTR dst, LPCWSTR src )
 122 {
 123     __TRY
 124     {
 125         CRTDLL_wcscat( dst, src );
 126     }
 127     __EXCEPT(page_fault)
 128     {
 129         SetLastError( ERROR_INVALID_PARAMETER );
 130         return NULL;
 131     }
 132     __ENDTRY
 133     return dst;
 134 }
 135
 136
 137 /***********************************************************************
 138  *           lstrcatn16   (KERNEL.352)
 139  */
 140 SEGPTR WINAPI lstrcatn16( SEGPTR dst, LPCSTR src, INT16 n )
 141 {
 142     LPSTR p = (LPSTR)PTR_SEG_TO_LIN(dst);
 143
 144     while (*p) p++;
 145     if ((n -= (p - (LPSTR)PTR_SEG_TO_LIN(dst))) <= 0) return dst;
 146     lstrcpynA( p, src, n );
 147     return dst;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           lstrcmp16   (USER.430)
 153  */
 154 INT16 WINAPI lstrcmp16( LPCSTR str1, LPCSTR str2 )
 155 {
 156     return (INT16)strcmp( str1, str2 );
 157 }
 158
 159
 160 /***********************************************************************
 161  *           lstrcmp32A   (KERNEL.602)
 162  */
 163 INT WINAPI lstrcmpA( LPCSTR str1, LPCSTR str2 )
 164 {
 165     return CompareStringA(LOCALE_SYSTEM_DEFAULT,0,str1,-1,str2,-1) - 2 ;
 166 }
 167
 168
 169 /***********************************************************************
 170  *           lstrcmp32W   (KERNEL.603)
 171  * FIXME : should call CompareString32W, when it is implemented.
 172  *    This implementation is not "word sort", as it should.
 173  */
 174 INT WINAPI lstrcmpW( LPCWSTR str1, LPCWSTR str2 )
 175 {
 176     TRACE("%s and %s\n",
 177                    debugstr_w (str1), debugstr_w (str2));
 178     if (!str1 || !str2) {
 179         SetLastError(ERROR_INVALID_PARAMETER);
 180         return 0;
 181     }
 182     while (*str1 && (*str1 == *str2)) { str1++; str2++; }
 183     return (INT)(*str1 - *str2);
 184 }
 185
 186
 187 /***********************************************************************
 188  *           lstrcmpi16   (USER.471)
 189  */
 190 INT16 WINAPI lstrcmpi16( LPCSTR str1, LPCSTR str2 )
 191 {
 192     return (INT16)lstrcmpiA( str1, str2 );
 193 }
 194
 195
 196 /***********************************************************************
 197  *           lstrcmpi32A   (KERNEL32.605)
 198  */
 199 INT WINAPI lstrcmpiA( LPCSTR str1, LPCSTR str2 )
 200 {    TRACE("strcmpi %s and %s\n",
 201                    debugstr_a (str1), debugstr_a (str2));
 202     return CompareStringA(LOCALE_SYSTEM_DEFAULT,NORM_IGNORECASE,str1,-1,str2,-1)-2;
 203 }
 204
 205
 206 /***********************************************************************
 207  *           lstrcmpi32W   (KERNEL32.606)
 208  */
 209 INT WINAPI lstrcmpiW( LPCWSTR str1, LPCWSTR str2 )
 210 {
 211     INT res;
 212
 213 #if 0
 214     /* Too much!  (From registry loading.)  */
 215     TRACE("strcmpi %s and %s\n",
 216                    debugstr_w (str1), debugstr_w (str2));
 217 #endif
 218     if (!str1 || !str2) {
 219         SetLastError(ERROR_INVALID_PARAMETER);
 220         return 0;
 221     }
 222     while (*str1)
 223     {
 224         if ((*str1<0x100 ) && (*str2<0x100)) {
 225             if ((res = toupper(*str1) - toupper(*str2)) != 0) return res;
 226         } else {
 227             if ((res = towupper(*str1) - towupper(*str2)) != 0) return res;
 228         }
 229         str1++;
 230         str2++;
 231     }
 232     return towupper(*str1) - towupper(*str2);
 233 }
 234
 235
 236 /***********************************************************************
 237  *           lstrcpy16   (KERNEL.88)
 238  */
 239 SEGPTR WINAPI lstrcpy16( SEGPTR dst, LPCSTR src )
 240 {
 241     if (!lstrcpyA( PTR_SEG_TO_LIN(dst), src )) dst = 0;
 242     return dst;
 243 }
 244
 245
 246 /***********************************************************************
 247  *           lstrcpyA   (KERNEL32.608)
 248  */
 249 LPSTR WINAPI lstrcpyA( LPSTR dst, LPCSTR src )
 250 {
 251     __TRY
 252     {
 253         /* this is how Windows does it */
 254         memmove( dst, src, strlen(src)+1 );
 255     }
 256     __EXCEPT(page_fault)
 257     {
 258         ERR("(%p, %p): page fault occurred ! Caused by bug ?\n", dst, src);
 259         SetLastError( ERROR_INVALID_PARAMETER );
 260         return NULL;
 261     }
 262     __ENDTRY
 263     return dst;
 264 }
 265
 266
 267 /***********************************************************************
 268  *           lstrcpyW   (KERNEL32.609)
 269  */
 270 LPWSTR WINAPI lstrcpyW( LPWSTR dst, LPCWSTR src )
 271 {
 272     __TRY
 273     {
 274         CRTDLL_wcscpy( dst, src );
 275     }
 276     __EXCEPT(page_fault)
 277     {
 278         SetLastError( ERROR_INVALID_PARAMETER );
 279         return NULL;
 280     }
 281     __ENDTRY
 282     return dst;
 283 }
 284
 285
 286 /***********************************************************************
 287  *           lstrcpyn16   (KERNEL.353)
 288  */
 289 SEGPTR WINAPI lstrcpyn16( SEGPTR dst, LPCSTR src, INT16 n )
 290 {
 291     lstrcpynA( (LPSTR)PTR_SEG_TO_LIN(dst), src, n );
 292     return dst;
 293 }
 294
 295
 296 /***********************************************************************
 297  *           lstrcpyn32A   (KERNEL32.611)
 298  * Note: this function differs from the UNIX strncpy, it _always_ writes
 299  * a terminating \0
 300  */
 301 LPSTR WINAPI lstrcpynA( LPSTR dst, LPCSTR src, INT n )
 302 {
 303     LPSTR p = dst;
 304     TRACE("(%p, %s, %i)\n", dst, debugstr_an(src,n), n);
 305     /* In real windows the whole function is protected by an exception handler
 306      * that returns ERROR_INVALID_PARAMETER on faulty parameters
 307      * We currently just check for NULL.
 308      */
 309     if (!dst || !src) {
 310         SetLastError(ERROR_INVALID_PARAMETER);
 311         return 0;
 312     }
 313     while ((n-- > 1) && *src) *p++ = *src++;
 314     if (n >= 0) *p = 0;
 315     return dst;
 316 }
 317
 318
 319 /***********************************************************************
 320  *           lstrcpyn32W   (KERNEL32.612)
 321  * Note: this function differs from the UNIX strncpy, it _always_ writes
 322  * a terminating \0
 323  */
 324 LPWSTR WINAPI lstrcpynW( LPWSTR dst, LPCWSTR src, INT n )
 325 {
 326     LPWSTR p = dst;
 327     TRACE("(%p, %s, %i)\n", dst,  debugstr_wn(src,n), n);
 328     /* In real windows the whole function is protected by an exception handler
 329      * that returns ERROR_INVALID_PARAMETER on faulty parameters
 330      * We currently just check for NULL.
 331      */
 332     if (!dst || !src) {
 333         SetLastError(ERROR_INVALID_PARAMETER);
 334         return 0;
 335     }
 336     while ((n-- > 1) && *src) *p++ = *src++;
 337     if (n >= 0) *p = 0;
 338     return dst;
 339 }
 340
 341
 342 /***********************************************************************
 343  *           lstrlen16   (KERNEL.90)
 344  */
 345 INT16 WINAPI lstrlen16( LPCSTR str )
 346 {
 347     return (INT16)lstrlenA( str );
 348 }
 349
 350
 351 /***********************************************************************
 352  *           lstrlenA   (KERNEL32.614)
 353  */
 354 INT WINAPI lstrlenA( LPCSTR str )
 355 {
 356     INT ret;
 357     __TRY
 358     {
 359         ret = strlen(str);
 360     }
 361     __EXCEPT(page_fault)
 362     {
 363         SetLastError( ERROR_INVALID_PARAMETER );
 364         return 0;
 365     }
 366     __ENDTRY
 367     return ret;
 368 }
 369
 370
 371 /***********************************************************************
 372  *           lstrlenW   (KERNEL32.615)
 373  */
 374 INT WINAPI lstrlenW( LPCWSTR str )
 375 {
 376     INT ret;
 377     __TRY
 378     {
 379         ret = CRTDLL_wcslen(str);
 380     }
 381     __EXCEPT(page_fault)
 382     {
 383         SetLastError( ERROR_INVALID_PARAMETER );
 384         return 0;
 385     }
 386     __ENDTRY
 387     return ret;
 388 }
 389
 390
 391 /***********************************************************************
 392  *           lstrcpyAtoW   (Not a Windows API)
 393  */
 394 LPWSTR WINAPI lstrcpyAtoW( LPWSTR dst, LPCSTR src )
 395 {
 396     register LPWSTR p = dst;
 397
 398     TRACE("(%p, %s)\n", dst, debugstr_a(src));
 399
 400     while ((*p++ = (WCHAR)(unsigned char)*src++));
 401     return dst;
 402 }
 403
 404
 405 /***********************************************************************
 406  *           lstrcpyWtoA   (Not a Windows API)
 407  */
 408 LPSTR WINAPI lstrcpyWtoA( LPSTR dst, LPCWSTR src )
 409 {
 410     register LPSTR p = dst;
 411
 412     TRACE("(%p, %s)\n", dst, debugstr_w(src));
 413
 414     while ((*p++ = (CHAR)*src++));
 415     return dst;
 416 }
 417
 418
 419 /***********************************************************************
 420  *           lstrcpynAtoW   (Not a Windows API)
 421  * Note: this function differs from the UNIX strncpy, it _always_ writes
 422  * a terminating \0
 423  */
 424 LPWSTR WINAPI lstrcpynAtoW( LPWSTR dst, LPCSTR src, INT n )
 425 {
 426     LPWSTR p = dst;
 427
 428     TRACE("(%p, %s, %i)\n", dst, debugstr_an(src,n), n);
 429
 430     while ((n-- > 1) && *src) *p++ = (WCHAR)(unsigned char)*src++;
 431     if (n >= 0) *p = 0;
 432     return dst;
 433 }
 434
 435
 436 /***********************************************************************
 437  *           lstrcpynWtoA   (Not a Windows API)
 438  * Note: this function differs from the UNIX strncpy, it _always_ writes
 439  * a terminating \0
 440  *
 441  * The terminating zero should be written at the end of the string, not
 442  * the end of the buffer, as some programs specify the wrong size for
 443  * the buffer (eg. winnt's sol.exe)
 444  */
 445 LPSTR WINAPI lstrcpynWtoA( LPSTR dst, LPCWSTR src, INT n )
 446 {
 447     if (--n >= 0)
 448     {
 449         TRACE("(%p, %s, %i)\n", dst, debugstr_wn(src,n), n);
 450         n = CRTDLL_wcstombs( dst, src, n );
 451         if(n<0)
 452                  n=0;
 453         dst[n] = 0;
 454     }
 455     return dst;
 456 }
 457
 458 /***********************************************************************
 459  *           UnicodeToAnsi   (KERNEL.434)
 460  */
 461 INT16 WINAPI UnicodeToAnsi16( LPCWSTR src, LPSTR dst, INT16 codepage )
 462 {
 463     if ( codepage != -1 )
 464         FIXME("codepage %d not supported\n", codepage );
 465
 466     lstrcpyWtoA( dst, src );
 467
 468     return (INT16)lstrlenA( dst );
 469 }
 470
 471
 472 /***********************************************************************
 473  *           Copy   (GDI.250)
 474  */
 475 void WINAPI Copy16( LPVOID src, LPVOID dst, WORD size )
 476 {
 477     memcpy( dst, src, size );
 478 }
 479
 480 /***********************************************************************
 481  *           AnsiToOem16   (KEYBOARD.5)
 482  */
 483 INT16 WINAPI AnsiToOem16( LPCSTR s, LPSTR d )
 484 {
 485     CharToOemA( s, d );
 486     return -1;
 487 }
 488
 489
 490 /***********************************************************************
 491  *           OemToAnsi16   (KEYBOARD.6)
 492  */
 493 INT16 WINAPI OemToAnsi16( LPCSTR s, LPSTR d )
 494 {
 495     OemToCharA( s, d );
 496     return -1;
 497 }
 498
 499
 500 /***********************************************************************
 501  *           AnsiToOemBuff16   (KEYBOARD.134)
 502  */
 503 void WINAPI AnsiToOemBuff16( LPCSTR s, LPSTR d, UINT16 len )
 504 {
 505     if (len != 0) CharToOemBuffA( s, d, len );
 506 }
 507
 508
 509 /***********************************************************************
 510  *           OemToAnsiBuff16   (KEYBOARD.135)
 511  */
 512 void WINAPI OemToAnsiBuff16( LPCSTR s, LPSTR d, UINT16 len )
 513 {
 514     if (len != 0) OemToCharBuffA( s, d, len );
 515 }
 516
 517
 518 /***********************************************************************
 519  *           CharToOem32A   (USER32.37)
 520  */
 521 BOOL WINAPI CharToOemA( LPCSTR s, LPSTR d )
 522 {
 523     LPSTR oldd = d;
 524     if (!s || !d) return TRUE;
 525     TRACE("CharToOem %s\n", debugstr_a (s));
 526     while ((*d++ = ANSI_TO_OEM(*s++)));
 527     TRACE("       to %s\n", debugstr_a (oldd));
 528     return TRUE;
 529 }
 530
 531
 532 /***********************************************************************
 533  *           CharToOemBuff32A   (USER32.38)
 534  */
 535 BOOL WINAPI CharToOemBuffA( LPCSTR s, LPSTR d, DWORD len )
 536 {
 537     while (len--) *d++ = ANSI_TO_OEM(*s++);
 538     return TRUE;
 539 }
 540
 541
 542 /***********************************************************************
 543  *           CharToOemBuff32W   (USER32.39)
 544  */
 545 BOOL WINAPI CharToOemBuffW( LPCWSTR s, LPSTR d, DWORD len )
 546 {
 547     while (len--) *d++ = ANSI_TO_OEM(*s++);
 548     return TRUE;
 549 }
 550
 551
 552 /***********************************************************************
 553  *           CharToOem32W   (USER32.40)
 554  */
 555 BOOL WINAPI CharToOemW( LPCWSTR s, LPSTR d )
 556 {
 557     LPSTR oldd = d;
 558     if (!s || !d) return TRUE;
 559     TRACE("CharToOem %s\n", debugstr_w (s));
 560     while ((*d++ = ANSI_TO_OEM(*s++)));
 561     TRACE("       to %s\n", debugstr_a (oldd));
 562     return TRUE;
 563 }
 564
 565
 566 /***********************************************************************
 567  *           OemToChar32A   (USER32.402)
 568  */
 569 BOOL WINAPI OemToCharA( LPCSTR s, LPSTR d )
 570 {
 571     LPSTR oldd = d;
 572     TRACE("OemToChar %s\n", debugstr_a (s));
 573     while ((*d++ = OEM_TO_ANSI(*s++)));
 574     TRACE("       to %s\n", debugstr_a (oldd));
 575     return TRUE;
 576 }
 577
 578
 579 /***********************************************************************
 580  *           OemToCharBuff32A   (USER32.403)
 581  */
 582 BOOL WINAPI OemToCharBuffA( LPCSTR s, LPSTR d, DWORD len )
 583 {
 584     TRACE("OemToCharBuff %s\n", debugstr_an (s, len));
 585     while (len--) *d++ = OEM_TO_ANSI(*s++);
 586     return TRUE;
 587 }
 588
 589
 590 /***********************************************************************
 591  *           OemToCharBuff32W   (USER32.404)
 592  */
 593 BOOL WINAPI OemToCharBuffW( LPCSTR s, LPWSTR d, DWORD len )
 594 {
 595     TRACE("OemToCharBuff %s\n", debugstr_an (s, len));
 596     while (len--) *d++ = (WCHAR)OEM_TO_ANSI(*s++);
 597     return TRUE;
 598 }
 599
 600
 601 /***********************************************************************
 602  *           OemToChar32W   (USER32.405)
 603  */
 604 BOOL WINAPI OemToCharW( LPCSTR s, LPWSTR d )
 605 {
 606     while ((*d++ = (WCHAR)OEM_TO_ANSI(*s++)));
 607     return TRUE;
 608 }
 609
 610 /***********************************************************************
 611  *           lstrrchr   (Not a Windows API)
 612  *
 613  * This is the implementation meant to be invoked from within
 614  * COMCTL32_StrRChrA and shell32(TODO)...
 615  *
 616  * Return a pointer to the last occurence of wMatch in lpStart
 617  * not looking further than lpEnd...
 618  */
 619 LPSTR WINAPI lstrrchr( LPCSTR lpStart, LPCSTR lpEnd, WORD wMatch )
 620 {
 621   LPCSTR lpGotIt = NULL;
 622
 623   TRACE("(%p, %p, %x)\n", lpStart, lpEnd, wMatch);
 624
 625   if (!lpEnd) lpEnd = lpStart + strlen(lpStart);
 626
 627   for(; lpStart < lpEnd; lpStart = CharNextA(lpStart))
 628     if (!ChrCmpA( GET_WORD(lpStart), wMatch))
 629       lpGotIt = lpStart;
 630
 631   return ((LPSTR)lpGotIt);
 632 }
 633
 634 /***********************************************************************
 635  *           ChrCmpW
 636  * This fuction returns FALSE if both words match, TRUE otherwise...
 637  */
 638 static BOOL ChrCmpW( WORD word1, WORD word2) {
 639   return (word1 != word2);
 640 }
 641
 642 /***********************************************************************
 643  *           lstrrchrw    (Not a Windows API)
 644  *
 645  * This is the implementation meant to be invoked form within
 646  * COMCTL32_StrRChrW and shell32(TODO)...
 647  *
 648  * Return a pointer to the last occurence of wMatch in lpStart
 649  * not looking further than lpEnd...
 650  */
 651 LPWSTR WINAPI lstrrchrw( LPCWSTR lpStart, LPCWSTR lpEnd, WORD wMatch )
 652 {
 653   LPCWSTR lpGotIt = NULL;
 654
 655   TRACE("(%p, %p, %x)\n", lpStart, lpEnd, wMatch);
 656   if (!lpEnd) lpEnd = lpStart + lstrlenW(lpStart);
 657
 658   for(; lpStart < lpEnd; lpStart = CharNextW(lpStart))
 659     if (!ChrCmpW( GET_WORD(lpStart), wMatch))
 660       lpGotIt = lpStart;
 661
 662   return (LPWSTR)lpGotIt;
 663 }
 664
 665 /***********************************************************************
 666  *           ChrCmpA
 667  * This fuction returns FALSE if both words match, TRUE otherwise...
 668  */
 669 static BOOL ChrCmpA( WORD word1, WORD word2) {
 670   if (LOBYTE(word1) == LOBYTE(word2)) {
 671     if (IsDBCSLeadByte(LOBYTE(word1))) {
 672       return (word1 != word2);
 673     }
 674     return FALSE;
 675   }
 676   return TRUE;
 677 }