dlls/comctl32/string.c

   1 /*
   2  * String manipulation functions
   3  *
   4  * Copyright 1998 Eric Kohl
   5  *           1998 Juergen Schmied <j.schmied@metronet.de>
   6  *           2000 Eric Kohl for CodeWeavers
   7  * Copyright 2002 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  *
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <stdarg.h>
  29 #include <string.h>
  30 #include <stdlib.h> /* atoi */
  31
  32 #include "windef.h"
  33 #include "winbase.h"
  34 #include "winuser.h"
  35 #include "winnls.h"
  36
  37 #include "comctl32.h"
  38
  39 #include "wine/unicode.h"
  40
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(commctrl);
  44
  45 /*************************************************************************
  46  * COMCTL32_ChrCmpHelperA
  47  *
  48  * Internal helper for ChrCmpA/COMCTL32_ChrCmpIA.
  49  *
  50  * NOTES
  51  *  Both this function and its Unicode counterpart are very inefficient. To
  52  *  fix this, CompareString must be completely implemented and optimised
  53  *  first. Then the core character test can be taken out of that function and
  54  *  placed here, so that it need never be called at all. Until then, do not
  55  *  attempt to optimise this code unless you are willing to test that it
  56  *  still performs correctly.
  57  */
  58 static BOOL COMCTL32_ChrCmpHelperA(WORD ch1, WORD ch2, DWORD dwFlags)
  59 {
  60   char str1[3], str2[3];
  61
  62   str1[0] = LOBYTE(ch1);
  63   if (IsDBCSLeadByte(str1[0]))
  64   {
  65     str1[1] = HIBYTE(ch1);
  66     str1[2] = '\0';
  67   }
  68   else
  69     str1[1] = '\0';
  70
  71   str2[0] = LOBYTE(ch2);
  72   if (IsDBCSLeadByte(str2[0]))
  73   {
  74     str2[1] = HIBYTE(ch2);
  75     str2[2] = '\0';
  76   }
  77   else
  78     str2[1] = '\0';
  79
  80   return CompareStringA(GetThreadLocale(), dwFlags, str1, -1, str2, -1) - 2;
  81 }
  82
  83 /*************************************************************************
  84  * COMCTL32_ChrCmpA (internal)
  85  *
  86  * Internal helper function.
  87  */
  88 static BOOL COMCTL32_ChrCmpA(WORD ch1, WORD ch2)
  89 {
  90   return COMCTL32_ChrCmpHelperA(ch1, ch2, 0);
  91 }
  92
  93 /*************************************************************************
  94  * COMCTL32_ChrCmpIA    (internal)
  95  *
  96  * Compare two characters, ignoring case.
  97  *
  98  * PARAMS
  99  *  ch1 [I] First character to compare
 100  *  ch2 [I] Second character to compare
 101  *
 102  * RETURNS
 103  *  FALSE, if the characters are equal.
 104  *  Non-zero otherwise.
 105  */
 106 static BOOL COMCTL32_ChrCmpIA(WORD ch1, WORD ch2)
 107 {
 108   TRACE("(%d,%d)\n", ch1, ch2);
 109
 110   return COMCTL32_ChrCmpHelperA(ch1, ch2, NORM_IGNORECASE);
 111 }
 112
 113 /*************************************************************************
 114  * COMCTL32_ChrCmpIW
 115  *
 116  * Internal helper function.
 117  */
 118 static inline BOOL COMCTL32_ChrCmpIW(WCHAR ch1, WCHAR ch2)
 119 {
 120   return CompareStringW(GetThreadLocale(), NORM_IGNORECASE, &ch1, 1, &ch2, 1) - 2;
 121 }
 122
 123 /**************************************************************************
 124  * Str_GetPtrA [COMCTL32.233]
 125  *
 126  * Copies a string into a destination buffer.
 127  *
 128  * PARAMS
 129  *     lpSrc   [I] Source string
 130  *     lpDest  [O] Destination buffer
 131  *     nMaxLen [I] Size of buffer in characters
 132  *
 133  * RETURNS
 134  *     The number of characters copied.
 135  */
 136 INT WINAPI Str_GetPtrA (LPCSTR lpSrc, LPSTR lpDest, INT nMaxLen)
 137 {
 138     INT len;
 139
 140     TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);
 141
 142     if ((!lpDest || nMaxLen == 0) && lpSrc)
 143         return (strlen(lpSrc) + 1);
 144
 145     if (nMaxLen == 0)
 146         return 0;
 147
 148     if (lpSrc == NULL) {
 149         lpDest[0] = '\0';
 150         return 0;
 151     }
 152
 153     len = strlen(lpSrc) + 1;
 154     if (len >= nMaxLen)
 155         len = nMaxLen;
 156
 157     RtlMoveMemory (lpDest, lpSrc, len - 1);
 158     lpDest[len - 1] = '\0';
 159
 160     return len;
 161 }
 162
 163 /**************************************************************************
 164  * Str_SetPtrA [COMCTL32.234]
 165  *
 166  * Makes a copy of a string, allocating memory if necessary.
 167  *
 168  * PARAMS
 169  *     lppDest [O] Pointer to destination string
 170  *     lpSrc   [I] Source string
 171  *
 172  * RETURNS
 173  *     Success: TRUE
 174  *     Failure: FALSE
 175  *
 176  * NOTES
 177  *     Set lpSrc to NULL to free the memory allocated by a previous call
 178  *     to this function.
 179  */
 180 BOOL WINAPI Str_SetPtrA (LPSTR *lppDest, LPCSTR lpSrc)
 181 {
 182     TRACE("(%p %p)\n", lppDest, lpSrc);
 183
 184     if (lpSrc) {
 185         LPSTR ptr = ReAlloc (*lppDest, strlen (lpSrc) + 1);
 186         if (!ptr)
 187             return FALSE;
 188         strcpy (ptr, lpSrc);
 189         *lppDest = ptr;
 190     }
 191     else {
 192         Free (*lppDest);
 193         *lppDest = NULL;
 194     }
 195
 196     return TRUE;
 197 }
 198
 199 /**************************************************************************
 200  * Str_GetPtrW [COMCTL32.235]
 201  *
 202  * See Str_GetPtrA.
 203  */
 204 INT WINAPI Str_GetPtrW (LPCWSTR lpSrc, LPWSTR lpDest, INT nMaxLen)
 205 {
 206     INT len;
 207
 208     TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);
 209
 210     if (!lpDest && lpSrc)
 211         return strlenW (lpSrc);
 212
 213     if (nMaxLen == 0)
 214         return 0;
 215
 216     if (lpSrc == NULL) {
 217         lpDest[0] = '\0';
 218         return 0;
 219     }
 220
 221     len = strlenW (lpSrc);
 222     if (len >= nMaxLen)
 223         len = nMaxLen - 1;
 224
 225     RtlMoveMemory (lpDest, lpSrc, len*sizeof(WCHAR));
 226     lpDest[len] = '\0';
 227
 228     return len;
 229 }
 230
 231 /**************************************************************************
 232  * Str_SetPtrW [COMCTL32.236]
 233  *
 234  * See Str_SetPtrA.
 235  */
 236 BOOL WINAPI Str_SetPtrW (LPWSTR *lppDest, LPCWSTR lpSrc)
 237 {
 238     TRACE("(%p %s)\n", lppDest, debugstr_w(lpSrc));
 239
 240     if (lpSrc) {
 241         INT len = strlenW (lpSrc) + 1;
 242         LPWSTR ptr = ReAlloc (*lppDest, len * sizeof(WCHAR));
 243         if (!ptr)
 244             return FALSE;
 245         strcpyW (ptr, lpSrc);
 246         *lppDest = ptr;
 247     }
 248     else {
 249         Free (*lppDest);
 250         *lppDest = NULL;
 251     }
 252
 253     return TRUE;
 254 }
 255
 256 /**************************************************************************
 257  * StrChrA [COMCTL32.350]
 258  *
 259  * Find a given character in a string.
 260  *
 261  * PARAMS
 262  *  lpszStr [I] String to search in.
 263  *  ch      [I] Character to search for.
 264  *
 265  * RETURNS
 266  *  Success: A pointer to the first occurrence of ch in lpszStr, or NULL if
 267  *           not found.
 268  *  Failure: NULL, if any arguments are invalid.
 269  */
 270 LPSTR WINAPI StrChrA(LPCSTR lpszStr, WORD ch)
 271 {
 272   TRACE("(%s,%i)\n", debugstr_a(lpszStr), ch);
 273
 274   if (lpszStr)
 275   {
 276     while (*lpszStr)
 277     {
 278       if (!COMCTL32_ChrCmpA(*lpszStr, ch))
 279         return (LPSTR)lpszStr;
 280       lpszStr = CharNextA(lpszStr);
 281     }
 282   }
 283   return NULL;
 284 }
 285
 286 /**************************************************************************
 287  * StrCmpNIA [COMCTL32.353]
 288  *
 289  * Compare two strings, up to a maximum length, ignoring case.
 290  *
 291  * PARAMS
 292  *  lpszStr  [I] First string to compare
 293  *  lpszComp [I] Second string to compare
 294  *  iLen     [I] Maximum number of chars to compare.
 295  *
 296  * RETURNS
 297  *  An integer less than, equal to or greater than 0, indicating that
 298  *  lpszStr is less than, the same, or greater than lpszComp.
 299  */
 300 INT WINAPI StrCmpNIA(LPCSTR lpszStr, LPCSTR lpszComp, INT iLen)
 301 {
 302   INT iRet;
 303
 304   TRACE("(%s,%s,%i)\n", debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
 305
 306   iRet = CompareStringA(GetThreadLocale(), NORM_IGNORECASE, lpszStr, iLen, lpszComp, iLen);
 307   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 308 }
 309
 310 /*************************************************************************
 311  * StrCmpNIW    [COMCTL32.361]
 312  *
 313  * See StrCmpNIA.
 314  */
 315 INT WINAPI StrCmpNIW(LPCWSTR lpszStr, LPCWSTR lpszComp, INT iLen)
 316 {
 317   INT iRet;
 318
 319   TRACE("(%s,%s,%i)\n", debugstr_w(lpszStr), debugstr_w(lpszComp), iLen);
 320
 321   iRet = CompareStringW(GetThreadLocale(), NORM_IGNORECASE, lpszStr, iLen, lpszComp, iLen);
 322   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 323 }
 324
 325 /*************************************************************************
 326  * COMCTL32_StrStrHelperA
 327  *
 328  * Internal implementation of StrStrA/StrStrIA
 329  */
 330 static LPSTR COMCTL32_StrStrHelperA(LPCSTR lpszStr, LPCSTR lpszSearch,
 331                                     INT (WINAPI *pStrCmpFn)(LPCSTR,LPCSTR,INT))
 332 {
 333   size_t iLen;
 334
 335   if (!lpszStr || !lpszSearch || !*lpszSearch)
 336     return NULL;
 337
 338   iLen = strlen(lpszSearch);
 339
 340   while (*lpszStr)
 341   {
 342     if (!pStrCmpFn(lpszStr, lpszSearch, iLen))
 343       return (LPSTR)lpszStr;
 344     lpszStr = CharNextA(lpszStr);
 345   }
 346   return NULL;
 347 }
 348
 349 /**************************************************************************
 350  * StrStrIA [COMCTL32.355]
 351  *
 352  * Find a substring within a string, ignoring case.
 353  *
 354  * PARAMS
 355  *  lpszStr    [I] String to search in
 356  *  lpszSearch [I] String to look for
 357  *
 358  * RETURNS
 359  *  The start of lpszSearch within lpszStr, or NULL if not found.
 360  */
 361 LPSTR WINAPI StrStrIA(LPCSTR lpszStr, LPCSTR lpszSearch)
 362 {
 363   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszSearch));
 364
 365   return COMCTL32_StrStrHelperA(lpszStr, lpszSearch, StrCmpNIA);
 366 }
 367
 368 /**************************************************************************
 369  * StrToIntA [COMCTL32.357]
 370  *
 371  * Read a signed integer from a string.
 372  *
 373  * PARAMS
 374  *  lpszStr [I] String to read integer from
 375  *
 376  * RETURNS
 377  *   The signed integer value represented by the string, or 0 if no integer is
 378  *   present.
 379  */
 380 INT WINAPI StrToIntA (LPCSTR lpszStr)
 381 {
 382     return atoi(lpszStr);
 383 }
 384
 385 /**************************************************************************
 386  * StrStrIW [COMCTL32.363]
 387  *
 388  * See StrStrIA.
 389  */
 390 LPWSTR WINAPI StrStrIW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
 391 {
 392   int iLen;
 393
 394   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSearch));
 395
 396   if (!lpszStr || !lpszSearch || !*lpszSearch)
 397     return NULL;
 398
 399   iLen = strlenW(lpszSearch);
 400
 401   while (*lpszStr)
 402   {
 403     if (!StrCmpNIW(lpszStr, lpszSearch, iLen))
 404       return (LPWSTR)lpszStr;
 405     lpszStr++;
 406   }
 407   return NULL;
 408 }
 409
 410 /**************************************************************************
 411  * StrToIntW [COMCTL32.365]
 412  *
 413  * See StrToIntA.
 414  */
 415 INT WINAPI StrToIntW (LPCWSTR lpString)
 416 {
 417     return atoiW(lpString);
 418 }
 419
 420 /*************************************************************************
 421  * COMCTL32_StrSpnHelperA (internal)
 422  *
 423  * Internal implementation of StrSpnA/StrCSpnA/StrCSpnIA
 424  */
 425 static int COMCTL32_StrSpnHelperA(LPCSTR lpszStr, LPCSTR lpszMatch,
 426                                   LPSTR (WINAPI *pStrChrFn)(LPCSTR,WORD),
 427                                   BOOL bInvert)
 428 {
 429   LPCSTR lpszRead = lpszStr;
 430   if (lpszStr && *lpszStr && lpszMatch)
 431   {
 432     while (*lpszRead)
 433     {
 434       LPCSTR lpszTest = pStrChrFn(lpszMatch, *lpszRead);
 435
 436       if (!bInvert && !lpszTest)
 437         break;
 438       if (bInvert && lpszTest)
 439         break;
 440       lpszRead = CharNextA(lpszRead);
 441     };
 442   }
 443   return lpszRead - lpszStr;
 444 }
 445
 446 /**************************************************************************
 447  * StrCSpnA [COMCTL32.356]
 448  *
 449  * Find the length of the start of a string that does not contain certain
 450  * characters.
 451  *
 452  * PARAMS
 453  *  lpszStr   [I] String to search
 454  *  lpszMatch [I] Characters that cannot be in the substring
 455  *
 456  * RETURNS
 457  *  The length of the part of lpszStr containing only chars not in lpszMatch,
 458  *  or 0 if any parameter is invalid.
 459  */
 460 int WINAPI StrCSpnA(LPCSTR lpszStr, LPCSTR lpszMatch)
 461 {
 462   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
 463
 464   return COMCTL32_StrSpnHelperA(lpszStr, lpszMatch, StrChrA, TRUE);
 465 }
 466
 467 /**************************************************************************
 468  * StrChrW [COMCTL32.358]
 469  *
 470  * See StrChrA.
 471  */
 472 LPWSTR WINAPI StrChrW(LPCWSTR lpszStr, WCHAR ch)
 473 {
 474   LPWSTR lpszRet = NULL;
 475
 476   TRACE("(%s,%i)\n", debugstr_w(lpszStr), ch);
 477
 478   if (lpszStr)
 479     lpszRet = strchrW(lpszStr, ch);
 480   return lpszRet;
 481 }
 482
 483 /**************************************************************************
 484  * StrCmpNA [COMCTL32.352]
 485  *
 486  * Compare two strings, up to a maximum length.
 487  *
 488  * PARAMS
 489  *  lpszStr  [I] First string to compare
 490  *  lpszComp [I] Second string to compare
 491  *  iLen     [I] Maximum number of chars to compare.
 492  *
 493  * RETURNS
 494  *  An integer less than, equal to or greater than 0, indicating that
 495  *  lpszStr is less than, the same, or greater than lpszComp.
 496  */
 497 INT WINAPI StrCmpNA(LPCSTR lpszStr, LPCSTR lpszComp, INT iLen)
 498 {
 499   INT iRet;
 500
 501   TRACE("(%s,%s,%i)\n", debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
 502
 503   iRet = CompareStringA(GetThreadLocale(), 0, lpszStr, iLen, lpszComp, iLen);
 504   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 505 }
 506
 507 /**************************************************************************
 508  * StrCmpNW [COMCTL32.360]
 509  *
 510  * See StrCmpNA.
 511  */
 512 INT WINAPI StrCmpNW(LPCWSTR lpszStr, LPCWSTR lpszComp, INT iLen)
 513 {
 514   INT iRet;
 515
 516   TRACE("(%s,%s,%i)\n", debugstr_w(lpszStr), debugstr_w(lpszComp), iLen);
 517
 518   iRet = CompareStringW(GetThreadLocale(), 0, lpszStr, iLen, lpszComp, iLen);
 519   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 520 }
 521
 522 /**************************************************************************
 523  * StrRChrA [COMCTL32.351]
 524  *
 525  * Find the last occurrence of a character in string.
 526  *
 527  * PARAMS
 528  *  lpszStr [I] String to search in
 529  *  lpszEnd [I] Place to end search, or NULL to search until the end of lpszStr
 530  *  ch      [I] Character to search for.
 531  *
 532  * RETURNS
 533  *  Success: A pointer to the last occurrence of ch in lpszStr before lpszEnd,
 534  *           or NULL if not found.
 535  *  Failure: NULL, if any arguments are invalid.
 536  */
 537 LPSTR WINAPI StrRChrA(LPCSTR lpszStr, LPCSTR lpszEnd, WORD ch)
 538 {
 539   LPCSTR lpszRet = NULL;
 540
 541   TRACE("(%s,%s,%x)\n", debugstr_a(lpszStr), debugstr_a(lpszEnd), ch);
 542
 543   if (lpszStr)
 544   {
 545     WORD ch2;
 546
 547     if (!lpszEnd)
 548       lpszEnd = lpszStr + lstrlenA(lpszStr);
 549
 550     while (*lpszStr && lpszStr <= lpszEnd)
 551     {
 552       ch2 = IsDBCSLeadByte(*lpszStr)? *lpszStr << 8 | lpszStr[1] : *lpszStr;
 553
 554       if (!COMCTL32_ChrCmpA(ch, ch2))
 555         lpszRet = lpszStr;
 556       lpszStr = CharNextA(lpszStr);
 557     }
 558   }
 559   return (LPSTR)lpszRet;
 560 }
 561
 562
 563 /**************************************************************************
 564  * StrRChrW [COMCTL32.359]
 565  *
 566  * See StrRChrA.
 567  */
 568 LPWSTR WINAPI StrRChrW(LPCWSTR str, LPCWSTR end, WORD ch)
 569 {
 570     WCHAR *ret = NULL;
 571
 572     if (!str) return NULL;
 573     if (!end) end = str + strlenW(str);
 574     while (str < end)
 575     {
 576         if (*str == ch) ret = (WCHAR *)str;
 577         str++;
 578     }
 579     return ret;
 580 }
 581
 582 /**************************************************************************
 583  * StrStrA [COMCTL32.354]
 584  *
 585  * Find a substring within a string.
 586  *
 587  * PARAMS
 588  *  lpszStr    [I] String to search in
 589  *  lpszSearch [I] String to look for
 590  *
 591  * RETURNS
 592  *  The start of lpszSearch within lpszStr, or NULL if not found.
 593  */
 594 LPSTR WINAPI StrStrA(LPCSTR lpszStr, LPCSTR lpszSearch)
 595 {
 596   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszSearch));
 597
 598   return COMCTL32_StrStrHelperA(lpszStr, lpszSearch, StrCmpNA);
 599 }
 600
 601 /**************************************************************************
 602  * StrStrW [COMCTL32.362]
 603  *
 604  * See StrStrA.
 605  */
 606 LPWSTR WINAPI StrStrW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
 607 {
 608     if (!lpszStr || !lpszSearch) return NULL;
 609     return strstrW( lpszStr, lpszSearch );
 610 }
 611
 612 /*************************************************************************
 613  * StrChrIA     [COMCTL32.366]
 614  *
 615  * Find a given character in a string, ignoring case.
 616  *
 617  * PARAMS
 618  *  lpszStr [I] String to search in.
 619  *  ch      [I] Character to search for.
 620  *
 621  * RETURNS
 622  *  Success: A pointer to the first occurrence of ch in lpszStr, or NULL if
 623  *           not found.
 624  *  Failure: NULL, if any arguments are invalid.
 625  */
 626 LPSTR WINAPI StrChrIA(LPCSTR lpszStr, WORD ch)
 627 {
 628   TRACE("(%s,%i)\n", debugstr_a(lpszStr), ch);
 629
 630   if (lpszStr)
 631   {
 632     while (*lpszStr)
 633     {
 634       if (!COMCTL32_ChrCmpIA(*lpszStr, ch))
 635         return (LPSTR)lpszStr;
 636       lpszStr = CharNextA(lpszStr);
 637     }
 638   }
 639   return NULL;
 640 }
 641
 642 /*************************************************************************
 643  * StrChrIW     [COMCTL32.367]
 644  *
 645  * See StrChrA.
 646  */
 647 LPWSTR WINAPI StrChrIW(LPCWSTR lpszStr, WCHAR ch)
 648 {
 649   TRACE("(%s,%i)\n", debugstr_w(lpszStr), ch);
 650
 651   if (lpszStr)
 652   {
 653     ch = toupperW(ch);
 654     while (*lpszStr)
 655     {
 656       if (toupperW(*lpszStr) == ch)
 657         return (LPWSTR)lpszStr;
 658       lpszStr++;
 659     }
 660     lpszStr = NULL;
 661   }
 662   return (LPWSTR)lpszStr;
 663 }
 664
 665 /*************************************************************************
 666  * StrRStrIA    [COMCTL32.372]
 667  *
 668  * Find the last occurrence of a substring within a string.
 669  *
 670  * PARAMS
 671  *  lpszStr    [I] String to search in
 672  *  lpszEnd    [I] End of lpszStr
 673  *  lpszSearch [I] String to look for
 674  *
 675  * RETURNS
 676  *  The last occurrence lpszSearch within lpszStr, or NULL if not found.
 677  */
 678 LPSTR WINAPI StrRStrIA(LPCSTR lpszStr, LPCSTR lpszEnd, LPCSTR lpszSearch)
 679 {
 680   LPSTR lpszRet = NULL;
 681   WORD ch1, ch2;
 682   INT iLen;
 683
 684   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszSearch));
 685
 686   if (!lpszStr || !lpszSearch || !*lpszSearch)
 687     return NULL;
 688
 689   if (!lpszEnd)
 690     lpszEnd = lpszStr + lstrlenA(lpszStr);
 691
 692   if (IsDBCSLeadByte(*lpszSearch))
 693     ch1 = *lpszSearch << 8 | lpszSearch[1];
 694   else
 695     ch1 = *lpszSearch;
 696   iLen = lstrlenA(lpszSearch);
 697
 698   while (lpszStr <= lpszEnd  && *lpszStr)
 699   {
 700     ch2 = IsDBCSLeadByte(*lpszStr)? *lpszStr << 8 | lpszStr[1] : *lpszStr;
 701     if (!COMCTL32_ChrCmpIA(ch1, ch2))
 702     {
 703       if (!StrCmpNIA(lpszStr, lpszSearch, iLen))
 704         lpszRet = (LPSTR)lpszStr;
 705     }
 706     lpszStr = CharNextA(lpszStr);
 707   }
 708   return lpszRet;
 709 }
 710
 711 /*************************************************************************
 712  * StrRStrIW    [COMCTL32.373]
 713  *
 714  * See StrRStrIA.
 715  */
 716 LPWSTR WINAPI StrRStrIW(LPCWSTR lpszStr, LPCWSTR lpszEnd, LPCWSTR lpszSearch)
 717 {
 718   LPWSTR lpszRet = NULL;
 719   INT iLen;
 720
 721   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSearch));
 722
 723   if (!lpszStr || !lpszSearch || !*lpszSearch)
 724     return NULL;
 725
 726   if (!lpszEnd)
 727     lpszEnd = lpszStr + strlenW(lpszStr);
 728
 729   iLen = strlenW(lpszSearch);
 730
 731   while (lpszStr <= lpszEnd  && *lpszStr)
 732   {
 733     if (!COMCTL32_ChrCmpIW(*lpszSearch, *lpszStr))
 734     {
 735       if (!StrCmpNIW(lpszStr, lpszSearch, iLen))
 736         lpszRet = (LPWSTR)lpszStr;
 737     }
 738     lpszStr++;
 739   }
 740   return lpszRet;
 741 }
 742
 743 /*************************************************************************
 744  * StrCSpnIA    [COMCTL32.374]
 745  *
 746  * Find the length of the start of a string that does not contain certain
 747  * characters, ignoring case.
 748  *
 749  * PARAMS
 750  *  lpszStr   [I] String to search
 751  *  lpszMatch [I] Characters that cannot be in the substring
 752  *
 753  * RETURNS
 754  *  The length of the part of lpszStr containing only chars not in lpszMatch,
 755  *  or 0 if any parameter is invalid.
 756  */
 757 int WINAPI StrCSpnIA(LPCSTR lpszStr, LPCSTR lpszMatch)
 758 {
 759   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
 760
 761   return COMCTL32_StrSpnHelperA(lpszStr, lpszMatch, StrChrIA, TRUE);
 762 }
 763
 764 /*************************************************************************
 765  * StrCSpnIW    [COMCTL32.375]
 766  *
 767  * See StrCSpnIA.
 768  */
 769 int WINAPI StrCSpnIW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
 770 {
 771   LPCWSTR lpszRead = lpszStr;
 772
 773   TRACE("(%s,%s)\n",debugstr_w(lpszStr), debugstr_w(lpszMatch));
 774
 775   if (lpszStr && *lpszStr && lpszMatch)
 776   {
 777     while (*lpszRead)
 778     {
 779       if (StrChrIW(lpszMatch, *lpszRead)) break;
 780       lpszRead++;
 781     }
 782   }
 783   return lpszRead - lpszStr;
 784 }
 785
 786 /**************************************************************************
 787  * StrRChrIA    [COMCTL32.368]
 788  *
 789  * Find the last occurrence of a character in string, ignoring case.
 790  *
 791  * PARAMS
 792  *  lpszStr [I] String to search in
 793  *  lpszEnd [I] Place to end search, or NULL to search until the end of lpszStr
 794  *  ch      [I] Character to search for.
 795  *
 796  * RETURNS
 797  *  Success: A pointer to the last occurrence of ch in lpszStr before lpszEnd,
 798  *           or NULL if not found.
 799  *  Failure: NULL, if any arguments are invalid.
 800  */
 801 LPSTR WINAPI StrRChrIA(LPCSTR lpszStr, LPCSTR lpszEnd, WORD ch)
 802 {
 803   LPCSTR lpszRet = NULL;
 804
 805   TRACE("(%s,%s,%x)\n", debugstr_a(lpszStr), debugstr_a(lpszEnd), ch);
 806
 807   if (lpszStr)
 808   {
 809     WORD ch2;
 810
 811     if (!lpszEnd)
 812       lpszEnd = lpszStr + lstrlenA(lpszStr);
 813
 814     while (*lpszStr && lpszStr <= lpszEnd)
 815     {
 816       ch2 = IsDBCSLeadByte(*lpszStr)? *lpszStr << 8 | lpszStr[1] : *lpszStr;
 817
 818       if (ch == ch2)
 819         lpszRet = lpszStr;
 820       lpszStr = CharNextA(lpszStr);
 821     }
 822   }
 823   return (LPSTR)lpszRet;
 824 }
 825
 826 /**************************************************************************
 827  * StrRChrIW    [COMCTL32.369]
 828  *
 829  * See StrRChrIA.
 830  */
 831 LPWSTR WINAPI StrRChrIW(LPCWSTR str, LPCWSTR end, WORD ch)
 832 {
 833     WCHAR *ret = NULL;
 834
 835     if (!str) return NULL;
 836     if (!end) end = str + strlenW(str);
 837     while (str < end)
 838     {
 839         if (!COMCTL32_ChrCmpIW(*str, ch)) ret = (WCHAR *)str;
 840         str++;
 841     }
 842     return ret;
 843 }
 844
 845 /*************************************************************************
 846  * StrCSpnW     [COMCTL32.364]
 847  *
 848  * See StrCSpnA.
 849  */
 850 int WINAPI StrCSpnW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
 851 {
 852     if (!lpszStr || !lpszMatch) return 0;
 853     return strcspnW( lpszStr, lpszMatch );
 854 }
 855
 856 /*************************************************************************
 857  * IntlStrEqWorkerA     [COMCTL32.376]
 858  *
 859  * Compare two strings.
 860  *
 861  * PARAMS
 862  *  bCase    [I] Whether to compare case sensitively
 863  *  lpszStr  [I] First string to compare
 864  *  lpszComp [I] Second string to compare
 865  *  iLen     [I] Length to compare
 866  *
 867  * RETURNS
 868  *  TRUE  If the strings are equal.
 869  *  FALSE Otherwise.
 870  */
 871 BOOL WINAPI IntlStrEqWorkerA(BOOL bCase, LPCSTR lpszStr, LPCSTR lpszComp,
 872                              int iLen)
 873 {
 874   DWORD dwFlags = LOCALE_USE_CP_ACP;
 875   int iRet;
 876
 877   TRACE("(%d,%s,%s,%d)\n", bCase,
 878         debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
 879
 880   /* FIXME: These flags are undocumented and unknown by our CompareString.
 881    *        We need defines for them.
 882    */
 883   dwFlags |= bCase ? 0x10000000 : 0x10000001;
 884
 885   iRet = CompareStringA(GetThreadLocale(),
 886                         dwFlags, lpszStr, iLen, lpszComp, iLen);
 887
 888   if (!iRet)
 889     iRet = CompareStringA(2048, dwFlags, lpszStr, iLen, lpszComp, iLen);
 890
 891   return iRet == 2 ? TRUE : FALSE;
 892 }
 893
 894 /*************************************************************************
 895  * IntlStrEqWorkerW     [COMCTL32.377]
 896  *
 897  * See IntlStrEqWorkerA.
 898  */
 899 BOOL WINAPI IntlStrEqWorkerW(BOOL bCase, LPCWSTR lpszStr, LPCWSTR lpszComp,
 900                              int iLen)
 901 {
 902   DWORD dwFlags;
 903   int iRet;
 904
 905   TRACE("(%d,%s,%s,%d)\n", bCase,
 906         debugstr_w(lpszStr),debugstr_w(lpszComp), iLen);
 907
 908   /* FIXME: These flags are undocumented and unknown by our CompareString.
 909    *        We need defines for them.
 910    */
 911   dwFlags = bCase ? 0x10000000 : 0x10000001;
 912
 913   iRet = CompareStringW(GetThreadLocale(),
 914                         dwFlags, lpszStr, iLen, lpszComp, iLen);
 915
 916   if (!iRet)
 917     iRet = CompareStringW(2048, dwFlags, lpszStr, iLen, lpszComp, iLen);
 918
 919   return iRet == 2 ? TRUE : FALSE;
 920 }