dlls/shlwapi/string.c

   1 /*
   2  * Shlwapi string functions
   3  *
   4  * Copyright 1998 Juergen Schmied
   5  * Copyright 2002 Jon Griffiths
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <math.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #define NONAMELESSUNION
  31 #define NONAMELESSSTRUCT
  32 #include "windef.h"
  33 #include "winbase.h"
  34 #define NO_SHLWAPI_REG
  35 #define NO_SHLWAPI_STREAM
  36 #include "shlwapi.h"
  37 #include "wingdi.h"
  38 #include "winuser.h"
  39 #include "shlobj.h"
  40 #include "mlang.h"
  41 #include "ddeml.h"
  42 #include "wine/unicode.h"
  43 #include "wine/debug.h"
  44
  45 #include "resource.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  48
  49 extern HINSTANCE shlwapi_hInstance;
  50
  51 static HRESULT WINAPI _SHStrDupAA(LPCSTR,LPSTR*);
  52 static HRESULT WINAPI _SHStrDupAW(LPCWSTR,LPSTR*);
  53
  54
  55 static void FillNumberFmt(NUMBERFMTW *fmt, LPWSTR decimal_buffer, int decimal_bufwlen,
  56                           LPWSTR thousand_buffer, int thousand_bufwlen)
  57 {
  58   WCHAR grouping[64];
  59   WCHAR *c;
  60
  61   GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_ILZERO|LOCALE_RETURN_NUMBER, (LPWSTR)&fmt->LeadingZero, sizeof(fmt->LeadingZero)/sizeof(WCHAR));
  62   GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_INEGNUMBER|LOCALE_RETURN_NUMBER, (LPWSTR)&fmt->LeadingZero, sizeof(fmt->NegativeOrder)/sizeof(WCHAR));
  63   fmt->NumDigits = 0;
  64   GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_SDECIMAL, decimal_buffer, decimal_bufwlen);
  65   GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_STHOUSAND, thousand_buffer, thousand_bufwlen);
  66   fmt->lpThousandSep = thousand_buffer;
  67   fmt->lpDecimalSep = decimal_buffer;
  68
  69   /*
  70    * Converting grouping string to number as described on
  71    * http://blogs.msdn.com/oldnewthing/archive/2006/04/18/578251.aspx
  72    */
  73   fmt->Grouping = 0;
  74   GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_SGROUPING, grouping, sizeof(grouping)/sizeof(WCHAR));
  75   for (c = grouping; *c; c++)
  76     if (*c >= '0' && *c < '9')
  77     {
  78       fmt->Grouping *= 10;
  79       fmt->Grouping += *c - '0';
  80     }
  81
  82   if (fmt->Grouping % 10 == 0)
  83     fmt->Grouping /= 10;
  84   else
  85     fmt->Grouping *= 10;
  86 }
  87
  88 /*************************************************************************
  89  * FormatInt   [internal]
  90  *
  91  * Format an integer according to the current locale
  92  *
  93  * RETURNS
  94  *  The number of bytes written on success or 0 on failure
  95  */
  96 static int FormatInt(LONGLONG qdwValue, LPWSTR pszBuf, int cchBuf)
  97 {
  98   NUMBERFMTW fmt;
  99   WCHAR decimal[8], thousand[8];
 100   WCHAR buf[24];
 101   WCHAR *c;
 102   BOOL neg = (qdwValue < 0);
 103
 104   FillNumberFmt(&fmt, decimal, sizeof decimal / sizeof (WCHAR),
 105                 thousand, sizeof thousand / sizeof (WCHAR));
 106
 107   c = &buf[24];
 108   *(--c) = 0;
 109   do
 110   {
 111     *(--c) = '0' + (qdwValue%10);
 112     qdwValue /= 10;
 113   } while (qdwValue > 0);
 114   if (neg)
 115     *(--c) = '-';
 116
 117   return GetNumberFormatW(LOCALE_USER_DEFAULT, 0, c, &fmt, pszBuf, cchBuf);
 118 }
 119
 120 /*************************************************************************
 121  * FormatDouble   [internal]
 122  *
 123  * Format an integer according to the current locale. Prints the specified number of digits
 124  * after the decimal point
 125  *
 126  * RETURNS
 127  *  The number of bytes written on success or 0 on failure
 128  */
 129 static int FormatDouble(double value, int decimals, LPWSTR pszBuf, int cchBuf)
 130 {
 131   static const WCHAR flfmt[] = {'%','f',0};
 132   WCHAR buf[64];
 133   NUMBERFMTW fmt;
 134   WCHAR decimal[8], thousand[8];
 135
 136   snprintfW(buf, 64, flfmt, value);
 137
 138   FillNumberFmt(&fmt, decimal, sizeof decimal / sizeof (WCHAR),
 139                  thousand, sizeof thousand / sizeof (WCHAR));
 140   fmt.NumDigits = decimals;
 141   return GetNumberFormatW(LOCALE_USER_DEFAULT, 0, buf, &fmt, pszBuf, cchBuf);
 142 }
 143
 144 /*************************************************************************
 145  * SHLWAPI_ChrCmpHelperA
 146  *
 147  * Internal helper for SHLWAPI_ChrCmpA/ChrCMPIA.
 148  *
 149  * NOTES
 150  *  Both this function and its Unicode counterpart are very inefficient. To
 151  *  fix this, CompareString must be completely implemented and optimised
 152  *  first. Then the core character test can be taken out of that function and
 153  *  placed here, so that it need never be called at all. Until then, do not
 154  *  attempt to optimise this code unless you are willing to test that it
 155  *  still performs correctly.
 156  */
 157 static BOOL WINAPI SHLWAPI_ChrCmpHelperA(WORD ch1, WORD ch2, DWORD dwFlags)
 158 {
 159   char str1[3], str2[3];
 160
 161   str1[0] = LOBYTE(ch1);
 162   if (IsDBCSLeadByte(str1[0]))
 163   {
 164     str1[1] = HIBYTE(ch1);
 165     str1[2] = '\0';
 166   }
 167   else
 168     str1[1] = '\0';
 169
 170   str2[0] = LOBYTE(ch2);
 171   if (IsDBCSLeadByte(str2[0]))
 172   {
 173     str2[1] = HIBYTE(ch2);
 174     str2[2] = '\0';
 175   }
 176   else
 177     str2[1] = '\0';
 178
 179   return CompareStringA(GetThreadLocale(), dwFlags, str1, -1, str2, -1) - 2;
 180 }
 181
 182 /*************************************************************************
 183  * SHLWAPI_ChrCmpHelperW
 184  *
 185  * Internal helper for SHLWAPI_ChrCmpW/ChrCmpIW.
 186  */
 187 static BOOL WINAPI SHLWAPI_ChrCmpHelperW(WCHAR ch1, WCHAR ch2, DWORD dwFlags)
 188 {
 189   WCHAR str1[2], str2[2];
 190
 191   str1[0] = ch1;
 192   str1[1] = '\0';
 193   str2[0] = ch2;
 194   str2[1] = '\0';
 195   return CompareStringW(GetThreadLocale(), dwFlags, str1, 2, str2, 2) - 2;
 196 }
 197
 198 /*************************************************************************
 199  * SHLWAPI_ChrCmpA
 200  *
 201  * Internal helper function.
 202  */
 203 static BOOL WINAPI SHLWAPI_ChrCmpA(WORD ch1, WORD ch2)
 204 {
 205   return SHLWAPI_ChrCmpHelperA(ch1, ch2, 0);
 206 }
 207
 208 /*************************************************************************
 209  * ChrCmpIA     (SHLWAPI.385)
 210  *
 211  * Compare two characters, ignoring case.
 212  *
 213  * PARAMS
 214  *  ch1 [I] First character to compare
 215  *  ch2 [I] Second character to compare
 216  *
 217  * RETURNS
 218  *  FALSE, if the characters are equal.
 219  *  Non-zero otherwise.
 220  */
 221 BOOL WINAPI ChrCmpIA(WORD ch1, WORD ch2)
 222 {
 223   TRACE("(%d,%d)\n", ch1, ch2);
 224
 225   return SHLWAPI_ChrCmpHelperA(ch1, ch2, NORM_IGNORECASE);
 226 }
 227
 228 /*************************************************************************
 229  * SHLWAPI_ChrCmpW
 230  *
 231  * Internal helper function.
 232  */
 233 static BOOL WINAPI SHLWAPI_ChrCmpW(WCHAR ch1, WCHAR ch2)
 234 {
 235   return SHLWAPI_ChrCmpHelperW(ch1, ch2, 0);
 236 }
 237
 238 /*************************************************************************
 239  * ChrCmpIW     [SHLWAPI.386]
 240  *
 241  * See ChrCmpIA.
 242  */
 243 BOOL WINAPI ChrCmpIW(WCHAR ch1, WCHAR ch2)
 244 {
 245   return SHLWAPI_ChrCmpHelperW(ch1, ch2, NORM_IGNORECASE);
 246 }
 247
 248 /*************************************************************************
 249  * StrChrA      [SHLWAPI.@]
 250  *
 251  * Find a given character in a string.
 252  *
 253  * PARAMS
 254  *  lpszStr [I] String to search in.
 255  *  ch      [I] Character to search for.
 256  *
 257  * RETURNS
 258  *  Success: A pointer to the first occurrence of ch in lpszStr, or NULL if
 259  *           not found.
 260  *  Failure: NULL, if any arguments are invalid.
 261  */
 262 LPSTR WINAPI StrChrA(LPCSTR lpszStr, WORD ch)
 263 {
 264   TRACE("(%s,%i)\n", debugstr_a(lpszStr), ch);
 265
 266   if (lpszStr)
 267   {
 268     while (*lpszStr)
 269     {
 270       if (!SHLWAPI_ChrCmpA(*lpszStr, ch))
 271         return (LPSTR)lpszStr;
 272       lpszStr = CharNextA(lpszStr);
 273     }
 274   }
 275   return NULL;
 276 }
 277
 278 /*************************************************************************
 279  * StrChrW      [SHLWAPI.@]
 280  *
 281  * See StrChrA.
 282  */
 283 LPWSTR WINAPI StrChrW(LPCWSTR lpszStr, WCHAR ch)
 284 {
 285   LPWSTR lpszRet = NULL;
 286
 287   TRACE("(%s,%i)\n", debugstr_w(lpszStr), ch);
 288
 289   if (lpszStr)
 290     lpszRet = strchrW(lpszStr, ch);
 291   return lpszRet;
 292 }
 293
 294 /*************************************************************************
 295  * StrChrIA     [SHLWAPI.@]
 296  *
 297  * Find a given character in a string, ignoring case.
 298  *
 299  * PARAMS
 300  *  lpszStr [I] String to search in.
 301  *  ch      [I] Character to search for.
 302  *
 303  * RETURNS
 304  *  Success: A pointer to the first occurrence of ch in lpszStr, or NULL if
 305  *           not found.
 306  *  Failure: NULL, if any arguments are invalid.
 307  */
 308 LPSTR WINAPI StrChrIA(LPCSTR lpszStr, WORD ch)
 309 {
 310   TRACE("(%s,%i)\n", debugstr_a(lpszStr), ch);
 311
 312   if (lpszStr)
 313   {
 314     while (*lpszStr)
 315     {
 316       if (!ChrCmpIA(*lpszStr, ch))
 317         return (LPSTR)lpszStr;
 318       lpszStr = CharNextA(lpszStr);
 319     }
 320   }
 321   return NULL;
 322 }
 323
 324 /*************************************************************************
 325  * StrChrIW     [SHLWAPI.@]
 326  *
 327  * See StrChrA.
 328  */
 329 LPWSTR WINAPI StrChrIW(LPCWSTR lpszStr, WCHAR ch)
 330 {
 331   TRACE("(%s,%i)\n", debugstr_w(lpszStr), ch);
 332
 333   if (lpszStr)
 334   {
 335     ch = toupperW(ch);
 336     while (*lpszStr)
 337     {
 338       if (toupperW(*lpszStr) == ch)
 339         return (LPWSTR)lpszStr;
 340       lpszStr = CharNextW(lpszStr);
 341     }
 342     lpszStr = NULL;
 343   }
 344   return (LPWSTR)lpszStr;
 345 }
 346
 347 /*************************************************************************
 348  * StrCmpIW     [SHLWAPI.@]
 349  *
 350  * Compare two strings, ignoring case.
 351  *
 352  * PARAMS
 353  *  lpszStr  [I] First string to compare
 354  *  lpszComp [I] Second string to compare
 355  *
 356  * RETURNS
 357  *  An integer less than, equal to or greater than 0, indicating that
 358  *  lpszStr is less than, the same, or greater than lpszComp.
 359  */
 360 int WINAPI StrCmpIW(LPCWSTR lpszStr, LPCWSTR lpszComp)
 361 {
 362   int iRet;
 363
 364   TRACE("(%s,%s)\n", debugstr_w(lpszStr),debugstr_w(lpszComp));
 365
 366   iRet = CompareStringW(GetThreadLocale(), NORM_IGNORECASE, lpszStr, -1, lpszComp, -1);
 367   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 368 }
 369
 370 /*************************************************************************
 371  * StrCmpNA     [SHLWAPI.@]
 372  *
 373  * Compare two strings, up to a maximum length.
 374  *
 375  * PARAMS
 376  *  lpszStr  [I] First string to compare
 377  *  lpszComp [I] Second string to compare
 378  *  iLen     [I] Maximum number of chars to compare.
 379  *
 380  * RETURNS
 381  *  An integer less than, equal to or greater than 0, indicating that
 382  *  lpszStr is less than, the same, or greater than lpszComp.
 383  */
 384 INT WINAPI StrCmpNA(LPCSTR lpszStr, LPCSTR lpszComp, INT iLen)
 385 {
 386   INT iRet;
 387
 388   TRACE("(%s,%s,%i)\n", debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
 389
 390   iRet = CompareStringA(GetThreadLocale(), 0, lpszStr, iLen, lpszComp, iLen);
 391   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 392 }
 393
 394 /*************************************************************************
 395  * StrCmpNW     [SHLWAPI.@]
 396  *
 397  * See StrCmpNA.
 398  */
 399 INT WINAPI StrCmpNW(LPCWSTR lpszStr, LPCWSTR lpszComp, INT iLen)
 400 {
 401   INT iRet;
 402
 403   TRACE("(%s,%s,%i)\n", debugstr_w(lpszStr), debugstr_w(lpszComp), iLen);
 404
 405   iRet = CompareStringW(GetThreadLocale(), 0, lpszStr, iLen, lpszComp, iLen);
 406   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 407 }
 408
 409 /*************************************************************************
 410  * StrCmpNIA    [SHLWAPI.@]
 411  *
 412  * Compare two strings, up to a maximum length, ignoring case.
 413  *
 414  * PARAMS
 415  *  lpszStr  [I] First string to compare
 416  *  lpszComp [I] Second string to compare
 417  *  iLen     [I] Maximum number of chars to compare.
 418  *
 419  * RETURNS
 420  *  An integer less than, equal to or greater than 0, indicating that
 421  *  lpszStr is less than, the same, or greater than lpszComp.
 422  */
 423 int WINAPI StrCmpNIA(LPCSTR lpszStr, LPCSTR lpszComp, int iLen)
 424 {
 425   INT iRet;
 426
 427   TRACE("(%s,%s,%i)\n", debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
 428
 429   iRet = CompareStringA(GetThreadLocale(), NORM_IGNORECASE, lpszStr, iLen, lpszComp, iLen);
 430   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 431 }
 432
 433 /*************************************************************************
 434  * StrCmpNIW    [SHLWAPI.@]
 435  *
 436  * See StrCmpNIA.
 437  */
 438 INT WINAPI StrCmpNIW(LPCWSTR lpszStr, LPCWSTR lpszComp, int iLen)
 439 {
 440   INT iRet;
 441
 442   TRACE("(%s,%s,%i)\n", debugstr_w(lpszStr), debugstr_w(lpszComp), iLen);
 443
 444   iRet = CompareStringW(GetThreadLocale(), NORM_IGNORECASE, lpszStr, iLen, lpszComp, iLen);
 445   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 446 }
 447
 448 /*************************************************************************
 449  * StrCmpW      [SHLWAPI.@]
 450  *
 451  * Compare two strings.
 452  *
 453  * PARAMS
 454  *  lpszStr  [I] First string to compare
 455  *  lpszComp [I] Second string to compare
 456  *
 457  * RETURNS
 458  *  An integer less than, equal to or greater than 0, indicating that
 459  *  lpszStr is less than, the same, or greater than lpszComp.
 460  */
 461 int WINAPI StrCmpW(LPCWSTR lpszStr, LPCWSTR lpszComp)
 462 {
 463   INT iRet;
 464
 465   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszComp));
 466
 467   iRet = CompareStringW(GetThreadLocale(), 0, lpszStr, -1, lpszComp, -1);
 468   return iRet == CSTR_LESS_THAN ? -1 : iRet == CSTR_GREATER_THAN ? 1 : 0;
 469 }
 470
 471 /*************************************************************************
 472  * StrCatW      [SHLWAPI.@]
 473  *
 474  * Concatanate two strings.
 475  *
 476  * PARAMS
 477  *  lpszStr [O] Initial string
 478  *  lpszSrc [I] String to concatanate
 479  *
 480  * RETURNS
 481  *  lpszStr.
 482  */
 483 LPWSTR WINAPI StrCatW(LPWSTR lpszStr, LPCWSTR lpszSrc)
 484 {
 485   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSrc));
 486
 487   strcatW(lpszStr, lpszSrc);
 488   return lpszStr;
 489 }
 490
 491 /*************************************************************************
 492  * StrCpyW      [SHLWAPI.@]
 493  *
 494  * Copy a string to another string.
 495  *
 496  * PARAMS
 497  *  lpszStr [O] Destination string
 498  *  lpszSrc [I] Source string
 499  *
 500  * RETURNS
 501  *  lpszStr.
 502  */
 503 LPWSTR WINAPI StrCpyW(LPWSTR lpszStr, LPCWSTR lpszSrc)
 504 {
 505   TRACE("(%p,%s)\n", lpszStr, debugstr_w(lpszSrc));
 506
 507   strcpyW(lpszStr, lpszSrc);
 508   return lpszStr;
 509 }
 510
 511 /*************************************************************************
 512  * StrCpyNW     [SHLWAPI.@]
 513  *
 514  * Copy a string to another string, up to a maximum number of characters.
 515  *
 516  * PARAMS
 517  *  lpszStr  [O] Destination string
 518  *  lpszSrc  [I] Source string
 519  *  iLen     [I] Maximum number of chars to copy
 520  *
 521  * RETURNS
 522  *  lpszStr.
 523  */
 524 LPWSTR WINAPI StrCpyNW(LPWSTR lpszStr, LPCWSTR lpszSrc, int iLen)
 525 {
 526   TRACE("(%p,%s,%i)\n", lpszStr, debugstr_w(lpszSrc), iLen);
 527
 528   lstrcpynW(lpszStr, lpszSrc, iLen);
 529   return lpszStr;
 530 }
 531
 532
 533
 534 /*************************************************************************
 535  * SHLWAPI_StrStrHelperA
 536  *
 537  * Internal implementation of StrStrA/StrStrIA
 538  */
 539 static LPSTR WINAPI SHLWAPI_StrStrHelperA(LPCSTR lpszStr, LPCSTR lpszSearch,
 540                                          int (*pStrCmpFn)(LPCSTR,LPCSTR,size_t))
 541 {
 542   size_t iLen;
 543
 544   if (!lpszStr || !lpszSearch || !*lpszSearch)
 545     return NULL;
 546
 547   iLen = strlen(lpszSearch);
 548
 549   while (*lpszStr)
 550   {
 551     if (!pStrCmpFn(lpszStr, lpszSearch, iLen))
 552       return (LPSTR)lpszStr;
 553     lpszStr = CharNextA(lpszStr);
 554   }
 555   return NULL;
 556 }
 557
 558 /*************************************************************************
 559  * SHLWAPI_StrStrHelperW
 560  *
 561  * Internal implementation of StrStrW/StrStrIW
 562  */
 563 static LPWSTR WINAPI SHLWAPI_StrStrHelperW(LPCWSTR lpszStr, LPCWSTR lpszSearch,
 564                                           int (*pStrCmpFn)(LPCWSTR,LPCWSTR,int))
 565 {
 566   int iLen;
 567
 568   if (!lpszStr || !lpszSearch || !*lpszSearch)
 569     return NULL;
 570
 571   iLen = strlenW(lpszSearch);
 572
 573   while (*lpszStr)
 574   {
 575     if (!pStrCmpFn(lpszStr, lpszSearch, iLen))
 576       return (LPWSTR)lpszStr;
 577     lpszStr = CharNextW(lpszStr);
 578   }
 579   return NULL;
 580 }
 581
 582 /*************************************************************************
 583  * StrStrA      [SHLWAPI.@]
 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 SHLWAPI_StrStrHelperA(lpszStr, lpszSearch, strncmp);
 599 }
 600
 601 /*************************************************************************
 602  * StrStrW      [SHLWAPI.@]
 603  *
 604  * See StrStrA.
 605  */
 606 LPWSTR WINAPI StrStrW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
 607 {
 608   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSearch));
 609
 610   return SHLWAPI_StrStrHelperW(lpszStr, lpszSearch, strncmpW);
 611 }
 612
 613 /*************************************************************************
 614  * StrRStrIA    [SHLWAPI.@]
 615  *
 616  * Find the last occurrence of a substring within a string.
 617  *
 618  * PARAMS
 619  *  lpszStr    [I] String to search in
 620  *  lpszEnd    [I] End of lpszStr
 621  *  lpszSearch [I] String to look for
 622  *
 623  * RETURNS
 624  *  The last occurrence lpszSearch within lpszStr, or NULL if not found.
 625  */
 626 LPSTR WINAPI StrRStrIA(LPCSTR lpszStr, LPCSTR lpszEnd, LPCSTR lpszSearch)
 627 {
 628   WORD ch1, ch2;
 629   INT iLen;
 630
 631   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszSearch));
 632
 633   if (!lpszStr || !lpszSearch || !*lpszSearch)
 634     return NULL;
 635
 636   if (!lpszEnd)
 637     lpszEnd = lpszStr + lstrlenA(lpszStr);
 638   if (lpszEnd == lpszStr)
 639     return NULL;
 640
 641   if (IsDBCSLeadByte(*lpszSearch))
 642     ch1 = *lpszSearch << 8 | (UCHAR)lpszSearch[1];
 643   else
 644     ch1 = *lpszSearch;
 645   iLen = lstrlenA(lpszSearch);
 646
 647   do
 648   {
 649     lpszEnd = CharPrevA(lpszStr, lpszEnd);
 650     ch2 = IsDBCSLeadByte(*lpszEnd)? *lpszEnd << 8 | (UCHAR)lpszEnd[1] : *lpszEnd;
 651     if (!ChrCmpIA(ch1, ch2))
 652     {
 653       if (!StrCmpNIA(lpszEnd, lpszSearch, iLen))
 654         return (LPSTR)lpszEnd;
 655     }
 656   } while (lpszEnd > lpszStr);
 657   return NULL;
 658 }
 659
 660 /*************************************************************************
 661  * StrRStrIW    [SHLWAPI.@]
 662  *
 663  * See StrRStrIA.
 664  */
 665 LPWSTR WINAPI StrRStrIW(LPCWSTR lpszStr, LPCWSTR lpszEnd, LPCWSTR lpszSearch)
 666 {
 667   INT iLen;
 668
 669   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSearch));
 670
 671   if (!lpszStr || !lpszSearch || !*lpszSearch)
 672     return NULL;
 673
 674   if (!lpszEnd)
 675     lpszEnd = lpszStr + strlenW(lpszStr);
 676   if (lpszEnd == lpszStr)
 677     return NULL;
 678
 679   iLen = strlenW(lpszSearch);
 680
 681   do
 682   {
 683     lpszEnd = CharPrevW(lpszStr, lpszEnd);
 684     if (!ChrCmpIW(*lpszSearch, *lpszEnd))
 685     {
 686       if (!StrCmpNIW(lpszEnd, lpszSearch, iLen))
 687         return (LPWSTR)lpszEnd;
 688     }
 689   } while (lpszEnd > lpszStr);
 690   return NULL;
 691 }
 692
 693 /*************************************************************************
 694  * StrStrIA     [SHLWAPI.@]
 695  *
 696  * Find a substring within a string, ignoring case.
 697  *
 698  * PARAMS
 699  *  lpszStr    [I] String to search in
 700  *  lpszSearch [I] String to look for
 701  *
 702  * RETURNS
 703  *  The start of lpszSearch within lpszStr, or NULL if not found.
 704  */
 705 LPSTR WINAPI StrStrIA(LPCSTR lpszStr, LPCSTR lpszSearch)
 706 {
 707   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszSearch));
 708
 709   return SHLWAPI_StrStrHelperA(lpszStr, lpszSearch, strncasecmp);
 710 }
 711
 712 /*************************************************************************
 713  * StrStrIW     [SHLWAPI.@]
 714  *
 715  * See StrStrIA.
 716  */
 717 LPWSTR WINAPI StrStrIW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
 718 {
 719   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszSearch));
 720
 721   return SHLWAPI_StrStrHelperW(lpszStr, lpszSearch, strncmpiW);
 722 }
 723
 724 /*************************************************************************
 725  * StrToIntA    [SHLWAPI.@]
 726  *
 727  * Read a signed integer from a string.
 728  *
 729  * PARAMS
 730  *  lpszStr [I] String to read integer from
 731  *
 732  * RETURNS
 733  *   The signed integer value represented by the string, or 0 if no integer is
 734  *   present.
 735  *
 736  * NOTES
 737  *  No leading space is allowed before the number, although a leading '-' is.
 738  */
 739 int WINAPI StrToIntA(LPCSTR lpszStr)
 740 {
 741   int iRet = 0;
 742
 743   TRACE("(%s)\n", debugstr_a(lpszStr));
 744
 745   if (!lpszStr)
 746   {
 747     WARN("Invalid lpszStr would crash under Win32!\n");
 748     return 0;
 749   }
 750
 751   if (*lpszStr == '-' || isdigit(*lpszStr))
 752     StrToIntExA(lpszStr, 0, &iRet);
 753   return iRet;
 754 }
 755
 756 /*************************************************************************
 757  * StrToIntW    [SHLWAPI.@]
 758  *
 759  * See StrToIntA.
 760  */
 761 int WINAPI StrToIntW(LPCWSTR lpszStr)
 762 {
 763   int iRet = 0;
 764
 765   TRACE("(%s)\n", debugstr_w(lpszStr));
 766
 767   if (!lpszStr)
 768   {
 769     WARN("Invalid lpszStr would crash under Win32!\n");
 770     return 0;
 771   }
 772
 773   if (*lpszStr == '-' || isdigitW(*lpszStr))
 774     StrToIntExW(lpszStr, 0, &iRet);
 775   return iRet;
 776 }
 777
 778 /*************************************************************************
 779  * StrToIntExA  [SHLWAPI.@]
 780  *
 781  * Read an integer from a string.
 782  *
 783  * PARAMS
 784  *  lpszStr [I] String to read integer from
 785  *  dwFlags [I] Flags controlling the conversion
 786  *  lpiRet  [O] Destination for read integer.
 787  *
 788  * RETURNS
 789  *  Success: TRUE. lpiRet contains the integer value represented by the string.
 790  *  Failure: FALSE, if the string is invalid, or no number is present.
 791  *
 792  * NOTES
 793  *  Leading whitespace, '-' and '+' are allowed before the number. If
 794  *  dwFlags includes STIF_SUPPORT_HEX, hexadecimal numbers are allowed, if
 795  *  preceded by '0x'. If this flag is not set, or there is no '0x' prefix,
 796  *  the string is treated as a decimal string. A leading '-' is ignored for
 797  *  hexadecimal numbers.
 798  */
 799 BOOL WINAPI StrToIntExA(LPCSTR lpszStr, DWORD dwFlags, LPINT lpiRet)
 800 {
 801   BOOL bNegative = FALSE;
 802   int iRet = 0;
 803
 804   TRACE("(%s,%08X,%p)\n", debugstr_a(lpszStr), dwFlags, lpiRet);
 805
 806   if (!lpszStr || !lpiRet)
 807   {
 808     WARN("Invalid parameter would crash under Win32!\n");
 809     return FALSE;
 810   }
 811   if (dwFlags > STIF_SUPPORT_HEX)
 812   {
 813     WARN("Unknown flags (%08lX)!\n", dwFlags & ~STIF_SUPPORT_HEX);
 814   }
 815
 816   /* Skip leading space, '+', '-' */
 817   while (isspace(*lpszStr))
 818     lpszStr = CharNextA(lpszStr);
 819
 820   if (*lpszStr == '-')
 821   {
 822     bNegative = TRUE;
 823     lpszStr++;
 824   }
 825   else if (*lpszStr == '+')
 826     lpszStr++;
 827
 828   if (dwFlags & STIF_SUPPORT_HEX &&
 829       *lpszStr == '0' && tolower(lpszStr[1]) == 'x')
 830   {
 831     /* Read hex number */
 832     lpszStr += 2;
 833
 834     if (!isxdigit(*lpszStr))
 835       return FALSE;
 836
 837     while (isxdigit(*lpszStr))
 838     {
 839       iRet = iRet * 16;
 840       if (isdigit(*lpszStr))
 841         iRet += (*lpszStr - '0');
 842       else
 843         iRet += 10 + (tolower(*lpszStr) - 'a');
 844       lpszStr++;
 845     }
 846     *lpiRet = iRet;
 847     return TRUE;
 848   }
 849
 850   /* Read decimal number */
 851   if (!isdigit(*lpszStr))
 852     return FALSE;
 853
 854   while (isdigit(*lpszStr))
 855   {
 856     iRet = iRet * 10;
 857     iRet += (*lpszStr - '0');
 858     lpszStr++;
 859   }
 860   *lpiRet = bNegative ? -iRet : iRet;
 861   return TRUE;
 862 }
 863
 864 /*************************************************************************
 865  * StrToIntExW  [SHLWAPI.@]
 866  *
 867  * See StrToIntExA.
 868  */
 869 BOOL WINAPI StrToIntExW(LPCWSTR lpszStr, DWORD dwFlags, LPINT lpiRet)
 870 {
 871   BOOL bNegative = FALSE;
 872   int iRet = 0;
 873
 874   TRACE("(%s,%08X,%p)\n", debugstr_w(lpszStr), dwFlags, lpiRet);
 875
 876   if (!lpszStr || !lpiRet)
 877   {
 878     WARN("Invalid parameter would crash under Win32!\n");
 879     return FALSE;
 880   }
 881   if (dwFlags > STIF_SUPPORT_HEX)
 882   {
 883     WARN("Unknown flags (%08lX)!\n", dwFlags & ~STIF_SUPPORT_HEX);
 884   }
 885
 886   /* Skip leading space, '+', '-' */
 887   while (isspaceW(*lpszStr))
 888     lpszStr = CharNextW(lpszStr);
 889
 890   if (*lpszStr == '-')
 891   {
 892     bNegative = TRUE;
 893     lpszStr++;
 894   }
 895   else if (*lpszStr == '+')
 896     lpszStr++;
 897
 898   if (dwFlags & STIF_SUPPORT_HEX &&
 899       *lpszStr == '0' && tolowerW(lpszStr[1]) == 'x')
 900   {
 901     /* Read hex number */
 902     lpszStr += 2;
 903
 904     if (!isxdigitW(*lpszStr))
 905       return FALSE;
 906
 907     while (isxdigitW(*lpszStr))
 908     {
 909       iRet = iRet * 16;
 910       if (isdigitW(*lpszStr))
 911         iRet += (*lpszStr - '0');
 912       else
 913         iRet += 10 + (tolowerW(*lpszStr) - 'a');
 914       lpszStr++;
 915     }
 916     *lpiRet = iRet;
 917     return TRUE;
 918   }
 919
 920   /* Read decimal number */
 921   if (!isdigitW(*lpszStr))
 922     return FALSE;
 923
 924   while (isdigitW(*lpszStr))
 925   {
 926     iRet = iRet * 10;
 927     iRet += (*lpszStr - '0');
 928     lpszStr++;
 929   }
 930   *lpiRet = bNegative ? -iRet : iRet;
 931   return TRUE;
 932 }
 933
 934 /*************************************************************************
 935  * StrDupA      [SHLWAPI.@]
 936  *
 937  * Duplicate a string.
 938  *
 939  * PARAMS
 940  *  lpszStr [I] String to duplicate.
 941  *
 942  * RETURNS
 943  *  Success: A pointer to a new string containing the contents of lpszStr
 944  *  Failure: NULL, if memory cannot be allocated
 945  *
 946  * NOTES
 947  *  The string memory is allocated with LocalAlloc(), and so should be released
 948  *  by calling LocalFree().
 949  */
 950 LPSTR WINAPI StrDupA(LPCSTR lpszStr)
 951 {
 952   int iLen;
 953   LPSTR lpszRet;
 954
 955   TRACE("(%s)\n",debugstr_a(lpszStr));
 956
 957   iLen = lpszStr ? strlen(lpszStr) + 1 : 1;
 958   lpszRet = (LPSTR)LocalAlloc(LMEM_FIXED, iLen);
 959
 960   if (lpszRet)
 961   {
 962     if (lpszStr)
 963       memcpy(lpszRet, lpszStr, iLen);
 964     else
 965       *lpszRet = '\0';
 966   }
 967   return lpszRet;
 968 }
 969
 970 /*************************************************************************
 971  * StrDupW      [SHLWAPI.@]
 972  *
 973  * See StrDupA.
 974  */
 975 LPWSTR WINAPI StrDupW(LPCWSTR lpszStr)
 976 {
 977   int iLen;
 978   LPWSTR lpszRet;
 979
 980   TRACE("(%s)\n",debugstr_w(lpszStr));
 981
 982   iLen = (lpszStr ? strlenW(lpszStr) + 1 : 1) * sizeof(WCHAR);
 983   lpszRet = (LPWSTR)LocalAlloc(LMEM_FIXED, iLen);
 984
 985   if (lpszRet)
 986   {
 987     if (lpszStr)
 988       memcpy(lpszRet, lpszStr, iLen);
 989     else
 990       *lpszRet = '\0';
 991   }
 992   return lpszRet;
 993 }
 994
 995 /*************************************************************************
 996  * SHLWAPI_StrSpnHelperA
 997  *
 998  * Internal implementation of StrSpnA/StrCSpnA/StrCSpnIA
 999  */
1000 static int WINAPI SHLWAPI_StrSpnHelperA(LPCSTR lpszStr, LPCSTR lpszMatch,
1001                                         LPSTR (WINAPI *pStrChrFn)(LPCSTR,WORD),
1002                                         BOOL bInvert)
1003 {
1004   LPCSTR lpszRead = lpszStr;
1005   if (lpszStr && *lpszStr && lpszMatch)
1006   {
1007     while (*lpszRead)
1008     {
1009       LPCSTR lpszTest = pStrChrFn(lpszMatch, *lpszRead);
1010
1011       if (!bInvert && !lpszTest)
1012         break;
1013       if (bInvert && lpszTest)
1014         break;
1015       lpszRead = CharNextA(lpszRead);
1016     };
1017   }
1018   return lpszRead - lpszStr;
1019 }
1020
1021 /*************************************************************************
1022  * SHLWAPI_StrSpnHelperW
1023  *
1024  * Internal implementation of StrSpnW/StrCSpnW/StrCSpnIW
1025  */
1026 static int WINAPI SHLWAPI_StrSpnHelperW(LPCWSTR lpszStr, LPCWSTR lpszMatch,
1027                                       LPWSTR (WINAPI *pStrChrFn)(LPCWSTR,WCHAR),
1028                                       BOOL bInvert)
1029 {
1030   LPCWSTR lpszRead = lpszStr;
1031   if (lpszStr && *lpszStr && lpszMatch)
1032   {
1033     while (*lpszRead)
1034     {
1035       LPCWSTR lpszTest = pStrChrFn(lpszMatch, *lpszRead);
1036
1037       if (!bInvert && !lpszTest)
1038         break;
1039       if (bInvert && lpszTest)
1040         break;
1041       lpszRead = CharNextW(lpszRead);
1042     };
1043   }
1044   return lpszRead - lpszStr;
1045 }
1046
1047 /*************************************************************************
1048  * StrSpnA      [SHLWAPI.@]
1049  *
1050  * Find the length of the start of a string that contains only certain
1051  * characters.
1052  *
1053  * PARAMS
1054  *  lpszStr   [I] String to search
1055  *  lpszMatch [I] Characters that can be in the substring
1056  *
1057  * RETURNS
1058  *  The length of the part of lpszStr containing only chars from lpszMatch,
1059  *  or 0 if any parameter is invalid.
1060  */
1061 int WINAPI StrSpnA(LPCSTR lpszStr, LPCSTR lpszMatch)
1062 {
1063   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
1064
1065   return SHLWAPI_StrSpnHelperA(lpszStr, lpszMatch, StrChrA, FALSE);
1066 }
1067
1068 /*************************************************************************
1069  * StrSpnW      [SHLWAPI.@]
1070  *
1071  * See StrSpnA.
1072  */
1073 int WINAPI StrSpnW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
1074 {
1075   TRACE("(%s,%s)\n",debugstr_w(lpszStr), debugstr_w(lpszMatch));
1076
1077   return SHLWAPI_StrSpnHelperW(lpszStr, lpszMatch, StrChrW, FALSE);
1078 }
1079
1080 /*************************************************************************
1081  * StrCSpnA     [SHLWAPI.@]
1082  *
1083  * Find the length of the start of a string that does not contain certain
1084  * characters.
1085  *
1086  * PARAMS
1087  *  lpszStr   [I] String to search
1088  *  lpszMatch [I] Characters that cannot be in the substring
1089  *
1090  * RETURNS
1091  *  The length of the part of lpszStr containing only chars not in lpszMatch,
1092  *  or 0 if any parameter is invalid.
1093  */
1094 int WINAPI StrCSpnA(LPCSTR lpszStr, LPCSTR lpszMatch)
1095 {
1096   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
1097
1098   return SHLWAPI_StrSpnHelperA(lpszStr, lpszMatch, StrChrA, TRUE);
1099 }
1100
1101 /*************************************************************************
1102  * StrCSpnW     [SHLWAPI.@]
1103  *
1104  * See StrCSpnA.
1105  */
1106 int WINAPI StrCSpnW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
1107 {
1108   TRACE("(%s,%s)\n",debugstr_w(lpszStr), debugstr_w(lpszMatch));
1109
1110   return SHLWAPI_StrSpnHelperW(lpszStr, lpszMatch, StrChrW, TRUE);
1111 }
1112
1113 /*************************************************************************
1114  * StrCSpnIA    [SHLWAPI.@]
1115  *
1116  * Find the length of the start of a string that does not contain certain
1117  * characters, ignoring case.
1118  *
1119  * PARAMS
1120  *  lpszStr   [I] String to search
1121  *  lpszMatch [I] Characters that cannot be in the substring
1122  *
1123  * RETURNS
1124  *  The length of the part of lpszStr containing only chars not in lpszMatch,
1125  *  or 0 if any parameter is invalid.
1126  */
1127 int WINAPI StrCSpnIA(LPCSTR lpszStr, LPCSTR lpszMatch)
1128 {
1129   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
1130
1131   return SHLWAPI_StrSpnHelperA(lpszStr, lpszMatch, StrChrIA, TRUE);
1132 }
1133
1134 /*************************************************************************
1135  * StrCSpnIW    [SHLWAPI.@]
1136  *
1137  * See StrCSpnIA.
1138  */
1139 int WINAPI StrCSpnIW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
1140 {
1141   TRACE("(%s,%s)\n",debugstr_w(lpszStr), debugstr_w(lpszMatch));
1142
1143   return SHLWAPI_StrSpnHelperW(lpszStr, lpszMatch, StrChrIW, TRUE);
1144 }
1145
1146 /*************************************************************************
1147  * StrPBrkA     [SHLWAPI.@]
1148  *
1149  * Search a string for any of a group of characters.
1150  *
1151  * PARAMS
1152  *  lpszStr   [I] String to search
1153  *  lpszMatch [I] Characters to match
1154  *
1155  * RETURNS
1156  *  A pointer to the first matching character in lpszStr, or NULL if no
1157  *  match was found.
1158  */
1159 LPSTR WINAPI StrPBrkA(LPCSTR lpszStr, LPCSTR lpszMatch)
1160 {
1161   TRACE("(%s,%s)\n",debugstr_a(lpszStr), debugstr_a(lpszMatch));
1162
1163   if (lpszStr && lpszMatch && *lpszMatch)
1164   {
1165     while (*lpszStr)
1166     {
1167       if (StrChrA(lpszMatch, *lpszStr))
1168         return (LPSTR)lpszStr;
1169       lpszStr = CharNextA(lpszStr);
1170     }
1171   }
1172   return NULL;
1173 }
1174
1175 /*************************************************************************
1176  * StrPBrkW     [SHLWAPI.@]
1177  *
1178  * See StrPBrkA.
1179  */
1180 LPWSTR WINAPI StrPBrkW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
1181 {
1182   TRACE("(%s,%s)\n",debugstr_w(lpszStr), debugstr_w(lpszMatch));
1183
1184   if (lpszStr && lpszMatch && *lpszMatch)
1185   {
1186     while (*lpszStr)
1187     {
1188       if (StrChrW(lpszMatch, *lpszStr))
1189         return (LPWSTR)lpszStr;
1190       lpszStr = CharNextW(lpszStr);
1191     }
1192   }
1193   return NULL;
1194 }
1195
1196 /*************************************************************************
1197  * SHLWAPI_StrRChrHelperA
1198  *
1199  * Internal implementation of StrRChrA/StrRChrIA.
1200  */
1201 static LPSTR WINAPI SHLWAPI_StrRChrHelperA(LPCSTR lpszStr,
1202                                            LPCSTR lpszEnd, WORD ch,
1203                                            BOOL (WINAPI *pChrCmpFn)(WORD,WORD))
1204 {
1205   LPCSTR lpszRet = NULL;
1206
1207   if (lpszStr)
1208   {
1209     WORD ch2;
1210
1211     if (!lpszEnd)
1212       lpszEnd = lpszStr + lstrlenA(lpszStr);
1213
1214     while (*lpszStr && lpszStr <= lpszEnd)
1215     {
1216       ch2 = IsDBCSLeadByte(*lpszStr)? *lpszStr << 8 | lpszStr[1] : *lpszStr;
1217
1218       if (!pChrCmpFn(ch, ch2))
1219         lpszRet = lpszStr;
1220       lpszStr = CharNextA(lpszStr);
1221     }
1222   }
1223   return (LPSTR)lpszRet;
1224 }
1225
1226 /*************************************************************************
1227  * SHLWAPI_StrRChrHelperW
1228  *
1229  * Internal implementation of StrRChrW/StrRChrIW.
1230  */
1231 static LPWSTR WINAPI SHLWAPI_StrRChrHelperW(LPCWSTR lpszStr,
1232                                          LPCWSTR lpszEnd, WCHAR ch,
1233                                          BOOL (WINAPI *pChrCmpFn)(WCHAR,WCHAR))
1234 {
1235   LPCWSTR lpszRet = NULL;
1236
1237   if (lpszStr)
1238   {
1239     if (!lpszEnd)
1240       lpszEnd = lpszStr + strlenW(lpszStr);
1241
1242     while (*lpszStr && lpszStr <= lpszEnd)
1243     {
1244       if (!pChrCmpFn(ch, *lpszStr))
1245         lpszRet = lpszStr;
1246       lpszStr = CharNextW(lpszStr);
1247     }
1248   }
1249   return (LPWSTR)lpszRet;
1250 }
1251
1252 /**************************************************************************
1253  * StrRChrA     [SHLWAPI.@]
1254  *
1255  * Find the last occurrence of a character in string.
1256  *
1257  * PARAMS
1258  *  lpszStr [I] String to search in
1259  *  lpszEnd [I] Place to end search, or NULL to search until the end of lpszStr
1260  *  ch      [I] Character to search for.
1261  *
1262  * RETURNS
1263  *  Success: A pointer to the last occurrence of ch in lpszStr before lpszEnd,
1264  *           or NULL if not found.
1265  *  Failure: NULL, if any arguments are invalid.
1266  */
1267 LPSTR WINAPI StrRChrA(LPCSTR lpszStr, LPCSTR lpszEnd, WORD ch)
1268 {
1269   TRACE("(%s,%s,%x)\n", debugstr_a(lpszStr), debugstr_a(lpszEnd), ch);
1270
1271   return SHLWAPI_StrRChrHelperA(lpszStr, lpszEnd, ch, SHLWAPI_ChrCmpA);
1272 }
1273
1274 /**************************************************************************
1275  * StrRChrW     [SHLWAPI.@]
1276  *
1277  * See StrRChrA.
1278  */
1279 LPWSTR WINAPI StrRChrW(LPCWSTR lpszStr, LPCWSTR lpszEnd, WORD ch)
1280 {
1281   TRACE("(%s,%s,%x)\n", debugstr_w(lpszStr), debugstr_w(lpszEnd), ch);
1282
1283   return SHLWAPI_StrRChrHelperW(lpszStr, lpszEnd, ch, SHLWAPI_ChrCmpW);
1284 }
1285
1286 /**************************************************************************
1287  * StrRChrIA    [SHLWAPI.@]
1288  *
1289  * Find the last occurrence of a character in string, ignoring case.
1290  *
1291  * PARAMS
1292  *  lpszStr [I] String to search in
1293  *  lpszEnd [I] Place to end search, or NULL to search until the end of lpszStr
1294  *  ch      [I] Character to search for.
1295  *
1296  * RETURNS
1297  *  Success: A pointer to the last occurrence of ch in lpszStr before lpszEnd,
1298  *           or NULL if not found.
1299  *  Failure: NULL, if any arguments are invalid.
1300  */
1301 LPSTR WINAPI StrRChrIA(LPCSTR lpszStr, LPCSTR lpszEnd, WORD ch)
1302 {
1303   TRACE("(%s,%s,%x)\n", debugstr_a(lpszStr), debugstr_a(lpszEnd), ch);
1304
1305   return SHLWAPI_StrRChrHelperA(lpszStr, lpszEnd, ch, ChrCmpIA);
1306 }
1307
1308 /**************************************************************************
1309  * StrRChrIW    [SHLWAPI.@]
1310  *
1311  * See StrRChrIA.
1312  */
1313 LPWSTR WINAPI StrRChrIW(LPCWSTR lpszStr, LPCWSTR lpszEnd, WORD ch)
1314 {
1315   TRACE("(%s,%s,%x)\n", debugstr_w(lpszStr), debugstr_w(lpszEnd), ch);
1316
1317   return SHLWAPI_StrRChrHelperW(lpszStr, lpszEnd, ch, ChrCmpIW);
1318 }
1319
1320 /*************************************************************************
1321  * StrCatBuffA  [SHLWAPI.@]
1322  *
1323  * Concatenate two strings together.
1324  *
1325  * PARAMS
1326  *  lpszStr [O] String to concatenate to
1327  *  lpszCat [I] String to add to lpszCat
1328  *  cchMax  [I] Maximum number of characters for the whole string
1329  *
1330  * RETURNS
1331  *  lpszStr.
1332  *
1333  * NOTES
1334  *  cchMax determines the number of characters in the final length of the
1335  *  string, not the number appended to lpszStr from lpszCat.
1336  */
1337 LPSTR WINAPI StrCatBuffA(LPSTR lpszStr, LPCSTR lpszCat, INT cchMax)
1338 {
1339   INT iLen;
1340
1341   TRACE("(%p,%s,%d)\n", lpszStr, debugstr_a(lpszCat), cchMax);
1342
1343   if (!lpszStr)
1344   {
1345     WARN("Invalid lpszStr would crash under Win32!\n");
1346     return NULL;
1347   }
1348
1349   iLen = strlen(lpszStr);
1350   cchMax -= iLen;
1351
1352   if (cchMax > 0)
1353     StrCpyNA(lpszStr + iLen, lpszCat, cchMax);
1354   return lpszStr;
1355 }
1356
1357 /*************************************************************************
1358  * StrCatBuffW  [SHLWAPI.@]
1359  *
1360  * See StrCatBuffA.
1361  */
1362 LPWSTR WINAPI StrCatBuffW(LPWSTR lpszStr, LPCWSTR lpszCat, INT cchMax)
1363 {
1364   INT iLen;
1365
1366   TRACE("(%p,%s,%d)\n", lpszStr, debugstr_w(lpszCat), cchMax);
1367
1368   if (!lpszStr)
1369   {
1370     WARN("Invalid lpszStr would crash under Win32!\n");
1371     return NULL;
1372   }
1373
1374   iLen = strlenW(lpszStr);
1375   cchMax -= iLen;
1376
1377   if (cchMax > 0)
1378     StrCpyNW(lpszStr + iLen, lpszCat, cchMax);
1379   return lpszStr;
1380 }
1381
1382 /*************************************************************************
1383  * StrRetToBufA                                 [SHLWAPI.@]
1384  *
1385  * Convert a STRRET to a normal string.
1386  *
1387  * PARAMS
1388  *  lpStrRet [O] STRRET to convert
1389  *  pIdl     [I] ITEMIDLIST for lpStrRet->uType == STRRET_OFFSET
1390  *  lpszDest [O] Destination for normal string
1391  *  dwLen    [I] Length of lpszDest
1392  *
1393  * RETURNS
1394  *  Success: S_OK. lpszDest contains up to dwLen characters of the string.
1395  *           If lpStrRet is of type STRRET_WSTR, its memory is freed with
1396  *           CoTaskMemFree() and its type set to STRRET_CSTRA.
1397  *  Failure: E_FAIL, if any parameters are invalid.
1398  */
1399 HRESULT WINAPI StrRetToBufA (LPSTRRET src, const ITEMIDLIST *pidl, LPSTR dest, UINT len)
1400 {
1401         /* NOTE:
1402          *  This routine is identical to that in dlls/shell32/shellstring.c.
1403          *  It was duplicated because not every version of Shlwapi.dll exports
1404          *  StrRetToBufA. If you change one routine, change them both.
1405          */
1406         TRACE("dest=%p len=0x%x strret=%p pidl=%p stub\n",dest,len,src,pidl);
1407
1408         if (!src)
1409         {
1410           WARN("Invalid lpStrRet would crash under Win32!\n");
1411           if (dest)
1412             *dest = '\0';
1413           return E_FAIL;
1414         }
1415
1416         if (!dest || !len)
1417           return E_FAIL;
1418
1419         *dest = '\0';
1420
1421         switch (src->uType)
1422         {
1423           case STRRET_WSTR:
1424             WideCharToMultiByte(CP_ACP, 0, src->u.pOleStr, -1, dest, len, NULL, NULL);
1425             CoTaskMemFree(src->u.pOleStr);
1426             break;
1427
1428           case STRRET_CSTR:
1429             lstrcpynA((LPSTR)dest, src->u.cStr, len);
1430             break;
1431
1432           case STRRET_OFFSET:
1433             lstrcpynA((LPSTR)dest, ((LPCSTR)&pidl->mkid)+src->u.uOffset, len);
1434             break;
1435
1436           default:
1437             FIXME("unknown type!\n");
1438             return FALSE;
1439         }
1440         return S_OK;
1441 }
1442
1443 /*************************************************************************
1444  * StrRetToBufW [SHLWAPI.@]
1445  *
1446  * See StrRetToBufA.
1447  */
1448 HRESULT WINAPI StrRetToBufW (LPSTRRET src, const ITEMIDLIST *pidl, LPWSTR dest, UINT len)
1449 {
1450         TRACE("dest=%p len=0x%x strret=%p pidl=%p stub\n",dest,len,src,pidl);
1451
1452         if (!src)
1453         {
1454           WARN("Invalid lpStrRet would crash under Win32!\n");
1455           if (dest)
1456             *dest = '\0';
1457           return E_FAIL;
1458         }
1459
1460         if (!dest || !len)
1461           return E_FAIL;
1462
1463         *dest = '\0';
1464
1465         switch (src->uType)
1466         {
1467           case STRRET_WSTR:
1468             lstrcpynW((LPWSTR)dest, src->u.pOleStr, len);
1469             CoTaskMemFree(src->u.pOleStr);
1470             break;
1471
1472           case STRRET_CSTR:
1473               if (!MultiByteToWideChar( CP_ACP, 0, src->u.cStr, -1, dest, len ) && len)
1474                   dest[len-1] = 0;
1475             break;
1476
1477           case STRRET_OFFSET:
1478             if (pidl)
1479             {
1480               if (!MultiByteToWideChar( CP_ACP, 0, ((LPCSTR)&pidl->mkid)+src->u.uOffset, -1,
1481                                         dest, len ) && len)
1482                   dest[len-1] = 0;
1483             }
1484             break;
1485
1486           default:
1487             FIXME("unknown type!\n");
1488             return FALSE;
1489         }
1490         return S_OK;
1491 }
1492
1493 /*************************************************************************
1494  * StrRetToStrA                                 [SHLWAPI.@]
1495  *
1496  * Converts a STRRET to a normal string.
1497  *
1498  * PARAMS
1499  *  lpStrRet [O] STRRET to convert
1500  *  pidl     [I] ITEMIDLIST for lpStrRet->uType == STRRET_OFFSET
1501  *  ppszName [O] Destination for converted string
1502  *
1503  * RETURNS
1504  *  Success: S_OK. ppszName contains the new string, allocated with CoTaskMemAlloc().
1505  *  Failure: E_FAIL, if any parameters are invalid.
1506  */
1507 HRESULT WINAPI StrRetToStrA(LPSTRRET lpStrRet, const ITEMIDLIST *pidl, LPSTR *ppszName)
1508 {
1509   HRESULT hRet = E_FAIL;
1510
1511   switch (lpStrRet->uType)
1512   {
1513   case STRRET_WSTR:
1514     hRet = _SHStrDupAW(lpStrRet->u.pOleStr, ppszName);
1515     CoTaskMemFree(lpStrRet->u.pOleStr);
1516     break;
1517
1518   case STRRET_CSTR:
1519     hRet = _SHStrDupAA(lpStrRet->u.cStr, ppszName);
1520     break;
1521
1522   case STRRET_OFFSET:
1523     hRet = _SHStrDupAA(((LPCSTR)&pidl->mkid) + lpStrRet->u.uOffset, ppszName);
1524     break;
1525
1526   default:
1527     *ppszName = NULL;
1528   }
1529
1530   return hRet;
1531 }
1532
1533 /*************************************************************************
1534  * StrRetToStrW                                 [SHLWAPI.@]
1535  *
1536  * See StrRetToStrA.
1537  */
1538 HRESULT WINAPI StrRetToStrW(LPSTRRET lpStrRet, const ITEMIDLIST *pidl, LPWSTR *ppszName)
1539 {
1540   HRESULT hRet = E_FAIL;
1541
1542   switch (lpStrRet->uType)
1543   {
1544   case STRRET_WSTR:
1545     hRet = SHStrDupW(lpStrRet->u.pOleStr, ppszName);
1546     CoTaskMemFree(lpStrRet->u.pOleStr);
1547     break;
1548
1549   case STRRET_CSTR:
1550     hRet = SHStrDupA(lpStrRet->u.cStr, ppszName);
1551     break;
1552
1553   case STRRET_OFFSET:
1554     hRet = SHStrDupA(((LPCSTR)&pidl->mkid) + lpStrRet->u.uOffset, ppszName);
1555     break;
1556
1557   default:
1558     *ppszName = NULL;
1559   }
1560
1561   return hRet;
1562 }
1563
1564 /* Create an ASCII string copy using SysAllocString() */
1565 static HRESULT _SHStrDupAToBSTR(LPCSTR src, BSTR *pBstrOut)
1566 {
1567     *pBstrOut = NULL;
1568
1569     if (src)
1570     {
1571         INT len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0);
1572         WCHAR* szTemp = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
1573
1574         if (szTemp)
1575         {
1576             MultiByteToWideChar(CP_ACP, 0, src, -1, szTemp, len);
1577             *pBstrOut = SysAllocString(szTemp);
1578             HeapFree(GetProcessHeap(), 0, szTemp);
1579
1580             if (*pBstrOut)
1581                 return S_OK;
1582         }
1583     }
1584     return E_OUTOFMEMORY;
1585 }
1586
1587 /*************************************************************************
1588  * StrRetToBSTR [SHLWAPI.@]
1589  *
1590  * Converts a STRRET to a BSTR.
1591  *
1592  * PARAMS
1593  *  lpStrRet [O] STRRET to convert
1594  *  pidl     [I] ITEMIDLIST for lpStrRet->uType = STRRET_OFFSET
1595  *  pBstrOut [O] Destination for converted BSTR
1596  *
1597  * RETURNS
1598  *  Success: S_OK. pBstrOut contains the new string.
1599  *  Failure: E_FAIL, if any parameters are invalid.
1600  */
1601 HRESULT WINAPI StrRetToBSTR(STRRET *lpStrRet, LPCITEMIDLIST pidl, BSTR* pBstrOut)
1602 {
1603   HRESULT hRet = E_FAIL;
1604
1605   switch (lpStrRet->uType)
1606   {
1607   case STRRET_WSTR:
1608     *pBstrOut = SysAllocString(lpStrRet->u.pOleStr);
1609     if (*pBstrOut)
1610       hRet = S_OK;
1611     CoTaskMemFree(lpStrRet->u.pOleStr);
1612     break;
1613
1614   case STRRET_CSTR:
1615     hRet = _SHStrDupAToBSTR(lpStrRet->u.cStr, pBstrOut);
1616     break;
1617
1618   case STRRET_OFFSET:
1619     hRet = _SHStrDupAToBSTR(((LPCSTR)&pidl->mkid) + lpStrRet->u.uOffset, pBstrOut);
1620     break;
1621
1622   default:
1623     *pBstrOut = NULL;
1624   }
1625
1626   return hRet;
1627 }
1628
1629 /*************************************************************************
1630  * StrFormatKBSizeA     [SHLWAPI.@]
1631  *
1632  * Create a formatted string containing a byte count in Kilobytes.
1633  *
1634  * PARAMS
1635  *  llBytes  [I] Byte size to format
1636  *  lpszDest [I] Destination for formatted string
1637  *  cchMax   [I] Size of lpszDest
1638  *
1639  * RETURNS
1640  *  lpszDest.
1641  */
1642 LPSTR WINAPI StrFormatKBSizeA(LONGLONG llBytes, LPSTR lpszDest, UINT cchMax)
1643 {
1644   WCHAR wszBuf[256];
1645
1646   if (!StrFormatKBSizeW(llBytes, wszBuf, 256))
1647     return NULL;
1648   if (!WideCharToMultiByte(CP_ACP, 0, wszBuf, -1, lpszDest, cchMax, NULL, NULL))
1649     return NULL;
1650   return lpszDest;
1651 }
1652
1653 /*************************************************************************
1654  * StrFormatKBSizeW     [SHLWAPI.@]
1655  *
1656  * See StrFormatKBSizeA.
1657  */
1658 LPWSTR WINAPI StrFormatKBSizeW(LONGLONG llBytes, LPWSTR lpszDest, UINT cchMax)
1659 {
1660   static const WCHAR kb[] = {' ','K','B',0};
1661   LONGLONG llKB = (llBytes + 1023) >> 10;
1662   int len;
1663
1664   TRACE("(0x%s,%p,%d)\n", wine_dbgstr_longlong(llBytes), lpszDest, cchMax);
1665
1666   if (!FormatInt(llKB, lpszDest, cchMax))
1667     return NULL;
1668
1669   len = lstrlenW(lpszDest);
1670   if (cchMax - len < 4)
1671       return NULL;
1672   lstrcatW(lpszDest, kb);
1673   return lpszDest;
1674 }
1675
1676 /*************************************************************************
1677  * StrNCatA     [SHLWAPI.@]
1678  *
1679  * Concatenate two strings together.
1680  *
1681  * PARAMS
1682  *  lpszStr [O] String to concatenate to
1683  *  lpszCat [I] String to add to lpszCat
1684  *  cchMax  [I] Maximum number of characters to concatenate
1685  *
1686  * RETURNS
1687  *  lpszStr.
1688  *
1689  * NOTES
1690  *  cchMax determines the number of characters that are appended to lpszStr,
1691  *  not the total length of the string.
1692  */
1693 LPSTR WINAPI StrNCatA(LPSTR lpszStr, LPCSTR lpszCat, INT cchMax)
1694 {
1695   LPSTR lpszRet = lpszStr;
1696
1697   TRACE("(%s,%s,%i)\n", debugstr_a(lpszStr), debugstr_a(lpszCat), cchMax);
1698
1699   if (!lpszStr)
1700   {
1701     WARN("Invalid lpszStr would crash under Win32!\n");
1702     return NULL;
1703   }
1704
1705   StrCpyNA(lpszStr + strlen(lpszStr), lpszCat, cchMax);
1706   return lpszRet;
1707 }
1708
1709 /*************************************************************************
1710  * StrNCatW     [SHLWAPI.@]
1711  *
1712  * See StrNCatA.
1713  */
1714 LPWSTR WINAPI StrNCatW(LPWSTR lpszStr, LPCWSTR lpszCat, INT cchMax)
1715 {
1716   LPWSTR lpszRet = lpszStr;
1717
1718   TRACE("(%s,%s,%i)\n", debugstr_w(lpszStr), debugstr_w(lpszCat), cchMax);
1719
1720   if (!lpszStr)
1721   {
1722     WARN("Invalid lpszStr would crash under Win32\n");
1723     return NULL;
1724   }
1725
1726   StrCpyNW(lpszStr + strlenW(lpszStr), lpszCat, cchMax);
1727   return lpszRet;
1728 }
1729
1730 /*************************************************************************
1731  * StrTrimA     [SHLWAPI.@]
1732  *
1733  * Remove characters from the start and end of a string.
1734  *
1735  * PARAMS
1736  *  lpszStr  [O] String to remove characters from
1737  *  lpszTrim [I] Characters to remove from lpszStr
1738  *
1739  * RETURNS
1740  *  TRUE  If lpszStr was valid and modified
1741  *  FALSE Otherwise
1742  */
1743 BOOL WINAPI StrTrimA(LPSTR lpszStr, LPCSTR lpszTrim)
1744 {
1745   DWORD dwLen;
1746   LPSTR lpszRead = lpszStr;
1747   BOOL bRet = FALSE;
1748
1749   TRACE("(%s,%s)\n", debugstr_a(lpszStr), debugstr_a(lpszTrim));
1750
1751   if (lpszRead && *lpszRead)
1752   {
1753     while (*lpszRead && StrChrA(lpszTrim, *lpszRead))
1754       lpszRead = CharNextA(lpszRead); /* Skip leading matches */
1755
1756     dwLen = strlen(lpszRead);
1757
1758     if (lpszRead != lpszStr)
1759     {
1760       memmove(lpszStr, lpszRead, dwLen + 1);
1761       bRet = TRUE;
1762     }
1763     if (dwLen > 0)
1764     {
1765       lpszRead = lpszStr + dwLen;
1766       while (StrChrA(lpszTrim, lpszRead[-1]))
1767         lpszRead = CharPrevA(lpszStr, lpszRead); /* Skip trailing matches */
1768
1769       if (lpszRead != lpszStr + dwLen)
1770       {
1771         *lpszRead = '\0';
1772         bRet = TRUE;
1773       }
1774     }
1775   }
1776   return bRet;
1777 }
1778
1779 /*************************************************************************
1780  * StrTrimW     [SHLWAPI.@]
1781  *
1782  * See StrTrimA.
1783  */
1784 BOOL WINAPI StrTrimW(LPWSTR lpszStr, LPCWSTR lpszTrim)
1785 {
1786   DWORD dwLen;
1787   LPWSTR lpszRead = lpszStr;
1788   BOOL bRet = FALSE;
1789
1790   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszTrim));
1791
1792   if (lpszRead && *lpszRead)
1793   {
1794     while (*lpszRead && StrChrW(lpszTrim, *lpszRead))
1795       lpszRead = CharNextW(lpszRead); /* Skip leading matches */
1796
1797     dwLen = strlenW(lpszRead);
1798
1799     if (lpszRead != lpszStr)
1800     {
1801       memmove(lpszStr, lpszRead, (dwLen + 1) * sizeof(WCHAR));
1802       bRet = TRUE;
1803     }
1804     if (dwLen > 0)
1805     {
1806       lpszRead = lpszStr + dwLen;
1807       while (StrChrW(lpszTrim, lpszRead[-1]))
1808         lpszRead = CharPrevW(lpszStr, lpszRead); /* Skip trailing matches */
1809
1810       if (lpszRead != lpszStr + dwLen)
1811       {
1812         *lpszRead = '\0';
1813         bRet = TRUE;
1814       }
1815     }
1816   }
1817   return bRet;
1818 }
1819
1820 /*************************************************************************
1821  *      _SHStrDupAA     [INTERNAL]
1822  *
1823  * Duplicates a ASCII string to ASCII. The destination buffer is allocated.
1824  */
1825 static HRESULT WINAPI _SHStrDupAA(LPCSTR src, LPSTR * dest)
1826 {
1827         HRESULT hr;
1828         int len = 0;
1829
1830         if (src) {
1831             len = lstrlenA(src) + 1;
1832             *dest = CoTaskMemAlloc(len);
1833         } else {
1834             *dest = NULL;
1835         }
1836
1837         if (*dest) {
1838             lstrcpynA(*dest,src, len);
1839             hr = S_OK;
1840         } else {
1841             hr = E_OUTOFMEMORY;
1842         }
1843
1844         TRACE("%s->(%p)\n", debugstr_a(src), *dest);
1845         return hr;
1846 }
1847
1848 /*************************************************************************
1849  * SHStrDupA    [SHLWAPI.@]
1850  *
1851  * Return a Unicode copy of a string, in memory allocated by CoTaskMemAlloc().
1852  *
1853  * PARAMS
1854  *  lpszStr   [I] String to copy
1855  *  lppszDest [O] Destination for the new string copy
1856  *
1857  * RETURNS
1858  *  Success: S_OK. lppszDest contains the new string in Unicode format.
1859  *  Failure: E_OUTOFMEMORY, If any arguments are invalid or memory allocation
1860  *           fails.
1861  */
1862 HRESULT WINAPI SHStrDupA(LPCSTR lpszStr, LPWSTR * lppszDest)
1863 {
1864   HRESULT hRet;
1865   int len = 0;
1866
1867   if (lpszStr)
1868   {
1869     len = MultiByteToWideChar(0, 0, lpszStr, -1, 0, 0) * sizeof(WCHAR);
1870     *lppszDest = CoTaskMemAlloc(len);
1871   }
1872   else
1873     *lppszDest = NULL;
1874
1875   if (*lppszDest)
1876   {
1877     MultiByteToWideChar(0, 0, lpszStr, -1, *lppszDest, len/sizeof(WCHAR));
1878     hRet = S_OK;
1879   }
1880   else
1881     hRet = E_OUTOFMEMORY;
1882
1883   TRACE("%s->(%p)\n", debugstr_a(lpszStr), *lppszDest);
1884   return hRet;
1885 }
1886
1887 /*************************************************************************
1888  *      _SHStrDupAW     [INTERNAL]
1889  *
1890  * Duplicates a UNICODE to a ASCII string. The destination buffer is allocated.
1891  */
1892 static HRESULT WINAPI _SHStrDupAW(LPCWSTR src, LPSTR * dest)
1893 {
1894         HRESULT hr;
1895         int len = 0;
1896
1897         if (src) {
1898             len = WideCharToMultiByte(CP_ACP, 0, src, -1, NULL, 0, NULL, NULL);
1899             *dest = CoTaskMemAlloc(len);
1900         } else {
1901             *dest = NULL;
1902         }
1903
1904         if (*dest) {
1905             WideCharToMultiByte(CP_ACP, 0, src, -1, *dest, len, NULL, NULL);
1906             hr = S_OK;
1907         } else {
1908             hr = E_OUTOFMEMORY;
1909         }
1910
1911         TRACE("%s->(%p)\n", debugstr_w(src), *dest);
1912         return hr;
1913 }
1914
1915 /*************************************************************************
1916  * SHStrDupW    [SHLWAPI.@]
1917  *
1918  * See SHStrDupA.
1919  */
1920 HRESULT WINAPI SHStrDupW(LPCWSTR src, LPWSTR * dest)
1921 {
1922         HRESULT hr;
1923         int len = 0;
1924
1925         if (src) {
1926             len = (lstrlenW(src) + 1) * sizeof(WCHAR);
1927             *dest = CoTaskMemAlloc(len);
1928         } else {
1929             *dest = NULL;
1930         }
1931
1932         if (*dest) {
1933             memcpy(*dest, src, len);
1934             hr = S_OK;
1935         } else {
1936             hr = E_OUTOFMEMORY;
1937         }
1938
1939         TRACE("%s->(%p)\n", debugstr_w(src), *dest);
1940         return hr;
1941 }
1942
1943 /*************************************************************************
1944  * SHLWAPI_WriteReverseNum
1945  *
1946  * Internal helper for SHLWAPI_WriteTimeClass.
1947  */
1948 static inline LPWSTR SHLWAPI_WriteReverseNum(LPWSTR lpszOut, DWORD dwNum)
1949 {
1950   *lpszOut-- = '\0';
1951
1952   /* Write a decimal number to a string, backwards */
1953   do
1954   {
1955     DWORD dwNextDigit = dwNum % 10;
1956     *lpszOut-- = '0' + dwNextDigit;
1957     dwNum = (dwNum - dwNextDigit) / 10;
1958   } while (dwNum > 0);
1959
1960   return lpszOut;
1961 }
1962
1963 /*************************************************************************
1964  * SHLWAPI_FormatSignificant
1965  *
1966  * Internal helper for SHLWAPI_WriteTimeClass.
1967  */
1968 static inline int SHLWAPI_FormatSignificant(LPWSTR lpszNum, int dwDigits)
1969 {
1970   /* Zero non significant digits, return remaining significant digits */
1971   while (*lpszNum)
1972   {
1973     lpszNum++;
1974     if (--dwDigits == 0)
1975     {
1976       while (*lpszNum)
1977         *lpszNum++ = '0';
1978       return 0;
1979     }
1980   }
1981   return dwDigits;
1982 }
1983
1984 /*************************************************************************
1985  * SHLWAPI_WriteTimeClass
1986  *
1987  * Internal helper for StrFromTimeIntervalW.
1988  */
1989 static int WINAPI SHLWAPI_WriteTimeClass(LPWSTR lpszOut, DWORD dwValue,
1990                                          UINT uClassStringId, int iDigits)
1991 {
1992   WCHAR szBuff[64], *szOut = szBuff + 32;
1993
1994   szOut = SHLWAPI_WriteReverseNum(szOut, dwValue);
1995   iDigits = SHLWAPI_FormatSignificant(szOut + 1, iDigits);
1996   *szOut = ' ';
1997   LoadStringW(shlwapi_hInstance, uClassStringId, szBuff + 32, 32);
1998   strcatW(lpszOut, szOut);
1999   return iDigits;
2000 }
2001
2002 /*************************************************************************
2003  * StrFromTimeIntervalA [SHLWAPI.@]
2004  *
2005  * Format a millisecond time interval into a string
2006  *
2007  * PARAMS
2008  *  lpszStr  [O] Output buffer for formatted time interval
2009  *  cchMax   [I] Size of lpszStr
2010  *  dwMS     [I] Number of milliseconds
2011  *  iDigits  [I] Number of digits to print
2012  *
2013  * RETURNS
2014  *  The length of the formatted string, or 0 if any parameter is invalid.
2015  *
2016  * NOTES
2017  *  This implementation mimics the Win32 behaviour of always writing a leading
2018  *  space before the time interval begins.
2019  *
2020  *  iDigits is used to provide approximate times if accuracy is not important.
2021  *  This number of digits will be written of the first non-zero time class
2022  *  (hours/minutes/seconds). If this does not complete the time classification,
2023  *  the remaining digits are changed to zeros (i.e. The time is _not_ rounded).
2024  *  If there are digits remaining following the writing of a time class, the
2025  *  next time class will be written.
2026  *
2027  *  For example, given dwMS represents 138 hours,43 minutes and 15 seconds, the
2028  *  following will result from the given values of iDigits:
2029  *
2030  *|  iDigits    1        2        3        4               5               ...
2031  *|  lpszStr   "100 hr" "130 hr" "138 hr" "138 hr 40 min" "138 hr 43 min"  ...
2032  */
2033 INT WINAPI StrFromTimeIntervalA(LPSTR lpszStr, UINT cchMax, DWORD dwMS,
2034                                 int iDigits)
2035 {
2036   INT iRet = 0;
2037
2038   TRACE("(%p,%d,%d,%d)\n", lpszStr, cchMax, dwMS, iDigits);
2039
2040   if (lpszStr && cchMax)
2041   {
2042     WCHAR szBuff[128];
2043     StrFromTimeIntervalW(szBuff, sizeof(szBuff)/sizeof(WCHAR), dwMS, iDigits);
2044     WideCharToMultiByte(CP_ACP,0,szBuff,-1,lpszStr,cchMax,0,0);
2045   }
2046   return iRet;
2047 }
2048
2049
2050 /*************************************************************************
2051  * StrFromTimeIntervalW [SHLWAPI.@]
2052  *
2053  * See StrFromTimeIntervalA.
2054  */
2055 INT WINAPI StrFromTimeIntervalW(LPWSTR lpszStr, UINT cchMax, DWORD dwMS,
2056                                 int iDigits)
2057 {
2058   INT iRet = 0;
2059
2060   TRACE("(%p,%d,%d,%d)\n", lpszStr, cchMax, dwMS, iDigits);
2061
2062   if (lpszStr && cchMax)
2063   {
2064     WCHAR szCopy[128];
2065     DWORD dwHours, dwMinutes;
2066
2067     if (!iDigits || cchMax == 1)
2068     {
2069       *lpszStr = '\0';
2070       return 0;
2071     }
2072
2073     /* Calculate the time classes */
2074     dwMS = (dwMS + 500) / 1000;
2075     dwHours = dwMS / 3600;
2076     dwMS -= dwHours * 3600;
2077     dwMinutes = dwMS / 60;
2078     dwMS -= dwMinutes * 60;
2079
2080     szCopy[0] = '\0';
2081
2082     if (dwHours)
2083       iDigits = SHLWAPI_WriteTimeClass(szCopy, dwHours, IDS_TIME_INTERVAL_HOURS, iDigits);
2084
2085     if (dwMinutes && iDigits)
2086       iDigits = SHLWAPI_WriteTimeClass(szCopy, dwMinutes, IDS_TIME_INTERVAL_MINUTES, iDigits);
2087
2088     if (iDigits) /* Always write seconds if we have significant digits */
2089       SHLWAPI_WriteTimeClass(szCopy, dwMS, IDS_TIME_INTERVAL_SECONDS, iDigits);
2090
2091     lstrcpynW(lpszStr, szCopy, cchMax);
2092     iRet = strlenW(lpszStr);
2093   }
2094   return iRet;
2095 }
2096
2097 /*************************************************************************
2098  * StrIsIntlEqualA      [SHLWAPI.@]
2099  *
2100  * Compare two strings.
2101  *
2102  * PARAMS
2103  *  bCase    [I] Whether to compare case sensitively
2104  *  lpszStr  [I] First string to compare
2105  *  lpszComp [I] Second string to compare
2106  *  iLen     [I] Length to compare
2107  *
2108  * RETURNS
2109  *  TRUE  If the strings are equal.
2110  *  FALSE Otherwise.
2111  */
2112 BOOL WINAPI StrIsIntlEqualA(BOOL bCase, LPCSTR lpszStr, LPCSTR lpszComp,
2113                             int iLen)
2114 {
2115   DWORD dwFlags;
2116
2117   TRACE("(%d,%s,%s,%d)\n", bCase,
2118         debugstr_a(lpszStr), debugstr_a(lpszComp), iLen);
2119
2120   /* FIXME: This flag is undocumented and unknown by our CompareString.
2121    *        We need a define for it.
2122    */
2123   dwFlags = 0x10000000;
2124   if (!bCase) dwFlags |= NORM_IGNORECASE;
2125
2126   return (CompareStringA(GetThreadLocale(), dwFlags, lpszStr, iLen, lpszComp, iLen) == CSTR_EQUAL);
2127 }
2128
2129 /*************************************************************************
2130  * StrIsIntlEqualW      [SHLWAPI.@]
2131  *
2132  * See StrIsIntlEqualA.
2133  */
2134 BOOL WINAPI StrIsIntlEqualW(BOOL bCase, LPCWSTR lpszStr, LPCWSTR lpszComp,
2135                             int iLen)
2136 {
2137   DWORD dwFlags;
2138
2139   TRACE("(%d,%s,%s,%d)\n", bCase,
2140         debugstr_w(lpszStr),debugstr_w(lpszComp), iLen);
2141
2142   /* FIXME: This flag is undocumented and unknown by our CompareString.
2143    *        We need a define for it.
2144    */
2145   dwFlags = 0x10000000;
2146   if (!bCase) dwFlags |= NORM_IGNORECASE;
2147
2148   return (CompareStringW(GetThreadLocale(), dwFlags, lpszStr, iLen, lpszComp, iLen) == CSTR_EQUAL);
2149 }
2150
2151 /*************************************************************************
2152  * @    [SHLWAPI.399]
2153  *
2154  * Copy a string to another string, up to a maximum number of characters.
2155  *
2156  * PARAMS
2157  *  lpszDest [O] Destination string
2158  *  lpszSrc  [I] Source string
2159  *  iLen     [I] Maximum number of chars to copy
2160  *
2161  * RETURNS
2162  *  Success: A pointer to the last character written to lpszDest.
2163  *  Failure: lpszDest, if any arguments are invalid.
2164  */
2165 LPSTR WINAPI StrCpyNXA(LPSTR lpszDest, LPCSTR lpszSrc, int iLen)
2166 {
2167   TRACE("(%p,%s,%i)\n", lpszDest, debugstr_a(lpszSrc), iLen);
2168
2169   if (lpszDest && lpszSrc && iLen > 0)
2170   {
2171     while ((iLen-- > 1) && *lpszSrc)
2172       *lpszDest++ = *lpszSrc++;
2173     if (iLen >= 0)
2174      *lpszDest = '\0';
2175   }
2176   return lpszDest;
2177 }
2178
2179 /*************************************************************************
2180  * @    [SHLWAPI.400]
2181  *
2182  * Unicode version of StrCpyNXA.
2183  */
2184 LPWSTR WINAPI StrCpyNXW(LPWSTR lpszDest, LPCWSTR lpszSrc, int iLen)
2185 {
2186   TRACE("(%p,%s,%i)\n", lpszDest, debugstr_w(lpszSrc), iLen);
2187
2188   if (lpszDest && lpszSrc && iLen > 0)
2189   {
2190     while ((iLen-- > 1) && *lpszSrc)
2191       *lpszDest++ = *lpszSrc++;
2192     if (iLen >= 0)
2193      *lpszDest = '\0';
2194   }
2195   return lpszDest;
2196 }
2197
2198 /*************************************************************************
2199  * StrCmpLogicalW       [SHLWAPI.@]
2200  *
2201  * Compare two strings, ignoring case and comparing digits as numbers.
2202  *
2203  * PARAMS
2204  *  lpszStr  [I] First string to compare
2205  *  lpszComp [I] Second string to compare
2206  *  iLen     [I] Length to compare
2207  *
2208  * RETURNS
2209  *  TRUE  If the strings are equal.
2210  *  FALSE Otherwise.
2211  */
2212 INT WINAPI StrCmpLogicalW(LPCWSTR lpszStr, LPCWSTR lpszComp)
2213 {
2214   INT iDiff;
2215
2216   TRACE("(%s,%s)\n", debugstr_w(lpszStr), debugstr_w(lpszComp));
2217
2218   if (lpszStr && lpszComp)
2219   {
2220     while (*lpszStr)
2221     {
2222       if (!*lpszComp)
2223         return 1;
2224       else if (isdigitW(*lpszStr))
2225       {
2226         int iStr, iComp;
2227
2228         if (!isdigitW(*lpszComp))
2229           return -1;
2230
2231         /* Compare the numbers */
2232         StrToIntExW(lpszStr, 0, &iStr);
2233         StrToIntExW(lpszComp, 0, &iComp);
2234
2235         if (iStr < iComp)
2236           return -1;
2237         else if (iStr > iComp)
2238           return 1;
2239
2240         /* Skip */
2241         while (isdigitW(*lpszStr))
2242           lpszStr++;
2243         while (isdigitW(*lpszComp))
2244           lpszComp++;
2245       }
2246       else if (isdigitW(*lpszComp))
2247         return 1;
2248       else
2249       {
2250         iDiff = SHLWAPI_ChrCmpHelperW(*lpszStr,*lpszComp,NORM_IGNORECASE);
2251         if (iDiff > 0)
2252           return 1;
2253         else if (iDiff < 0)
2254           return -1;
2255
2256         lpszStr++;
2257         lpszComp++;
2258       }
2259     }
2260     if (*lpszComp)
2261       return -1;
2262   }
2263   return 0;
2264 }
2265
2266 /* Structure for formatting byte strings */
2267 typedef struct tagSHLWAPI_BYTEFORMATS
2268 {
2269   LONGLONG dLimit;
2270   double   dDivisor;
2271   double   dNormaliser;
2272   int      nDecimals;
2273   WCHAR     wPrefix;
2274 } SHLWAPI_BYTEFORMATS;
2275
2276 /*************************************************************************
2277  * StrFormatByteSizeW   [SHLWAPI.@]
2278  *
2279  * Create a string containing an abbreviated byte count of up to 2^63-1.
2280  *
2281  * PARAMS
2282  *  llBytes  [I] Byte size to format
2283  *  lpszDest [I] Destination for formatted string
2284  *  cchMax   [I] Size of lpszDest
2285  *
2286  * RETURNS
2287  *  lpszDest.
2288  *
2289  * NOTES
2290  *  There is no StrFormatByteSize64W function, it is called StrFormatByteSizeW().
2291  */
2292 LPWSTR WINAPI StrFormatByteSizeW(LONGLONG llBytes, LPWSTR lpszDest, UINT cchMax)
2293 {
2294 #define KB ((ULONGLONG)1024)
2295 #define MB (KB*KB)
2296 #define GB (KB*KB*KB)
2297 #define TB (KB*KB*KB*KB)
2298 #define PB (KB*KB*KB*KB*KB)
2299
2300   static const SHLWAPI_BYTEFORMATS bfFormats[] =
2301   {
2302     { 10*KB, 10.24, 100.0, 2, 'K' }, /* 10 KB */
2303     { 100*KB, 102.4, 10.0, 1, 'K' }, /* 100 KB */
2304     { 1000*KB, 1024.0, 1.0, 0, 'K' }, /* 1000 KB */
2305     { 10*MB, 10485.76, 100.0, 2, 'M' }, /* 10 MB */
2306     { 100*MB, 104857.6, 10.0, 1, 'M' }, /* 100 MB */
2307     { 1000*MB, 1048576.0, 1.0, 0, 'M' }, /* 1000 MB */
2308     { 10*GB, 10737418.24, 100.0, 2, 'G' }, /* 10 GB */
2309     { 100*GB, 107374182.4, 10.0, 1, 'G' }, /* 100 GB */
2310     { 1000*GB, 1073741824.0, 1.0, 0, 'G' }, /* 1000 GB */
2311     { 10*TB, 10485.76, 100.0, 2, 'T' }, /* 10 TB */
2312     { 100*TB, 104857.6, 10.0, 1, 'T' }, /* 100 TB */
2313     { 1000*TB, 1048576.0, 1.0, 0, 'T' }, /* 1000 TB */
2314     { 10*PB, 10737418.24, 100.00, 2, 'P' }, /* 10 PB */
2315     { 100*PB, 107374182.4, 10.00, 1, 'P' }, /* 100 PB */
2316     { 1000*PB, 1073741824.0, 1.00, 0, 'P' }, /* 1000 PB */
2317     { 0, 10995116277.76, 100.00, 2, 'E' } /* EB's, catch all */
2318   };
2319   WCHAR wszAdd[] = {' ','?','B',0};
2320   double dBytes;
2321   UINT i = 0;
2322
2323   TRACE("(0x%s,%p,%d)\n", wine_dbgstr_longlong(llBytes), lpszDest, cchMax);
2324
2325   if (!lpszDest || !cchMax)
2326     return lpszDest;
2327
2328   if (llBytes < 1024)  /* 1K */
2329   {
2330     WCHAR wszBytesFormat[64];
2331     LoadStringW(shlwapi_hInstance, IDS_BYTES_FORMAT, wszBytesFormat, 64);
2332     snprintfW(lpszDest, cchMax, wszBytesFormat, (long)llBytes);
2333     return lpszDest;
2334   }
2335
2336   /* Note that if this loop completes without finding a match, i will be
2337    * pointing at the last entry, which is a catch all for > 1000 PB
2338    */
2339   while (i < sizeof(bfFormats) / sizeof(SHLWAPI_BYTEFORMATS) - 1)
2340   {
2341     if (llBytes < bfFormats[i].dLimit)
2342       break;
2343     i++;
2344   }
2345   /* Above 1 TB we encounter problems with FP accuracy. So for amounts above
2346    * this number we integer shift down by 1 MB first. The table above has
2347    * the divisors scaled down from the '< 10 TB' entry onwards, to account
2348    * for this. We also add a small fudge factor to get the correct result for
2349    * counts that lie exactly on a 1024 byte boundary.
2350    */
2351   if (i > 8)
2352     dBytes = (double)(llBytes >> 20) + 0.001; /* Scale down by I MB */
2353   else
2354     dBytes = (double)llBytes + 0.00001;
2355
2356   dBytes = floor(dBytes / bfFormats[i].dDivisor) / bfFormats[i].dNormaliser;
2357
2358   if (!FormatDouble(dBytes, bfFormats[i].nDecimals, lpszDest, cchMax))
2359     return NULL;
2360   wszAdd[1] = bfFormats[i].wPrefix;
2361   StrCatBuffW(lpszDest, wszAdd, cchMax);
2362   return lpszDest;
2363 }
2364
2365 /*************************************************************************
2366  * StrFormatByteSize64A [SHLWAPI.@]
2367  *
2368  * See StrFormatByteSizeW.
2369  */
2370 LPSTR WINAPI StrFormatByteSize64A(LONGLONG llBytes, LPSTR lpszDest, UINT cchMax)
2371 {
2372   WCHAR wszBuff[32];
2373
2374   StrFormatByteSizeW(llBytes, wszBuff, sizeof(wszBuff)/sizeof(WCHAR));
2375
2376   if (lpszDest)
2377     WideCharToMultiByte(CP_ACP, 0, wszBuff, -1, lpszDest, cchMax, 0, 0);
2378   return lpszDest;
2379 }
2380
2381 /*************************************************************************
2382  * StrFormatByteSizeA   [SHLWAPI.@]
2383  *
2384  * Create a string containing an abbreviated byte count of up to 2^31-1.
2385  *
2386  * PARAMS
2387  *  dwBytes  [I] Byte size to format
2388  *  lpszDest [I] Destination for formatted string
2389  *  cchMax   [I] Size of lpszDest
2390  *
2391  * RETURNS
2392  *  lpszDest.
2393  *
2394  * NOTES
2395  *  The Ascii and Unicode versions of this function accept a different
2396  *  integer type for dwBytes. See StrFormatByteSize64A().
2397  */
2398 LPSTR WINAPI StrFormatByteSizeA(DWORD dwBytes, LPSTR lpszDest, UINT cchMax)
2399 {
2400   TRACE("(%d,%p,%d)\n", dwBytes, lpszDest, cchMax);
2401
2402   return StrFormatByteSize64A(dwBytes, lpszDest, cchMax);
2403 }
2404
2405 /*************************************************************************
2406  *      @       [SHLWAPI.162]
2407  *
2408  * Remove a hanging lead byte from the end of a string, if present.
2409  *
2410  * PARAMS
2411  *  lpStr [I] String to check for a hanging lead byte
2412  *  size  [I] Length of lpStr
2413  *
2414  * RETURNS
2415  *  Success: The new length of the string. Any hanging lead bytes are removed.
2416  *  Failure: 0, if any parameters are invalid.
2417  */
2418 DWORD WINAPI SHTruncateString(LPSTR lpStr, DWORD size)
2419 {
2420   if (lpStr && size)
2421   {
2422     LPSTR lastByte = lpStr + size - 1;
2423
2424     while(lpStr < lastByte)
2425       lpStr += IsDBCSLeadByte(*lpStr) ? 2 : 1;
2426
2427     if(lpStr == lastByte && IsDBCSLeadByte(*lpStr))
2428     {
2429       *lpStr = '\0';
2430       size--;
2431     }
2432     return size;
2433   }
2434   return 0;
2435 }
2436
2437 /*************************************************************************
2438  *      @       [SHLWAPI.203]
2439  *
2440  * Remove a single non-trailing ampersand ('&') from a string.
2441  *
2442  * PARAMS
2443  *  lpszStr [I/O] String to remove ampersand from.
2444  *
2445  * RETURNS
2446  *  The character after the first ampersand in lpszStr, or the first character
2447  *  in lpszStr if there is no ampersand in the string.
2448  */
2449 char WINAPI SHStripMneumonicA(LPCSTR lpszStr)
2450 {
2451   LPSTR lpszIter, lpszTmp;
2452   char ch;
2453
2454   TRACE("(%s)\n", debugstr_a(lpszStr));
2455
2456   ch = *lpszStr;
2457
2458   if ((lpszIter = StrChrA(lpszStr, '&')))
2459   {
2460     lpszTmp = CharNextA(lpszIter);
2461     if (lpszTmp && *lpszTmp)
2462     {
2463       if (*lpszTmp != '&')
2464         ch =  *lpszTmp;
2465
2466       while (lpszIter && *lpszIter)
2467       {
2468         lpszTmp = CharNextA(lpszIter);
2469         *lpszIter = *lpszTmp;
2470         lpszIter = lpszTmp;
2471       }
2472     }
2473   }
2474
2475   return ch;
2476 }
2477
2478 /*************************************************************************
2479  *      @       [SHLWAPI.225]
2480  *
2481  * Unicode version of SHStripMneumonicA.
2482  */
2483 WCHAR WINAPI SHStripMneumonicW(LPCWSTR lpszStr)
2484 {
2485   LPWSTR lpszIter, lpszTmp;
2486   WCHAR ch;
2487
2488   TRACE("(%s)\n", debugstr_w(lpszStr));
2489
2490   ch = *lpszStr;
2491
2492   if ((lpszIter = StrChrW(lpszStr, '&')))
2493   {
2494     lpszTmp = CharNextW(lpszIter);
2495     if (lpszTmp && *lpszTmp)
2496     {
2497       if (*lpszTmp != '&')
2498         ch =  *lpszTmp;
2499
2500       while (lpszIter && *lpszIter)
2501       {
2502         lpszTmp = CharNextW(lpszIter);
2503         *lpszIter = *lpszTmp;
2504         lpszIter = lpszTmp;
2505       }
2506     }
2507   }
2508
2509   return ch;
2510 }
2511
2512 /*************************************************************************
2513  *      @       [SHLWAPI.216]
2514  *
2515  * Convert an Ascii string to Unicode.
2516  *
2517  * PARAMS
2518  * dwCp     [I] Code page for the conversion
2519  * lpSrcStr [I] Source Ascii string to convert
2520  * lpDstStr [O] Destination for converted Unicode string
2521  * iLen     [I] Length of lpDstStr
2522  *
2523  * RETURNS
2524  *  The return value of the MultiByteToWideChar() function called on lpSrcStr.
2525  */
2526 DWORD WINAPI SHAnsiToUnicodeCP(DWORD dwCp, LPCSTR lpSrcStr, LPWSTR lpDstStr, int iLen)
2527 {
2528   DWORD dwRet;
2529
2530   dwRet = MultiByteToWideChar(dwCp, 0, lpSrcStr, -1, lpDstStr, iLen);
2531   TRACE("%s->%s,ret=%d\n", debugstr_a(lpSrcStr), debugstr_w(lpDstStr), dwRet);
2532   return dwRet;
2533 }
2534
2535 /*************************************************************************
2536  *      @       [SHLWAPI.215]
2537  *
2538  * Convert an Ascii string to Unicode.
2539  *
2540  * PARAMS
2541  * lpSrcStr [I] Source Ascii string to convert
2542  * lpDstStr [O] Destination for converted Unicode string
2543  * iLen     [I] Length of lpDstStr
2544  *
2545  * RETURNS
2546  *  The return value of the MultiByteToWideChar() function called on lpSrcStr.
2547  *
2548  * NOTES
2549  *  This function simply calls SHAnsiToUnicodeCP with code page CP_ACP.
2550  */
2551 DWORD WINAPI SHAnsiToUnicode(LPCSTR lpSrcStr, LPWSTR lpDstStr, int iLen)
2552 {
2553   return SHAnsiToUnicodeCP(CP_ACP, lpSrcStr, lpDstStr, iLen);
2554 }
2555
2556 /*************************************************************************
2557  *      @       [SHLWAPI.218]
2558  *
2559  * Convert a Unicode string to Ascii.
2560  *
2561  * PARAMS
2562  *  CodePage [I] Code page to use for the conversion
2563  *  lpSrcStr [I] Source Unicode string to convert
2564  *  lpDstStr [O] Destination for converted Ascii string
2565  *  lpiLen   [I/O] Input length of lpDstStr/destination for length of lpDstStr
2566  *
2567  * RETURNS
2568  *  Success: The number of characters that result from the conversion.
2569  *  Failure: 0.
2570  */
2571 INT WINAPI SHUnicodeToAnsiCP(UINT CodePage, LPCWSTR lpSrcStr, LPSTR lpDstStr,
2572                              LPINT lpiLen)
2573 {
2574   static const WCHAR emptyW[] = { '\0' };
2575   int len , reqLen;
2576   LPSTR mem;
2577
2578   if (!lpDstStr || !lpiLen)
2579     return 0;
2580
2581   if (!lpSrcStr)
2582     lpSrcStr = emptyW;
2583
2584   *lpDstStr = '\0';
2585
2586   len = strlenW(lpSrcStr) + 1;
2587
2588   switch (CodePage)
2589   {
2590   case CP_WINUNICODE:
2591     CodePage = CP_UTF8; /* Fall through... */
2592   case 0x0000C350: /* FIXME: CP_ #define */
2593   case CP_UTF7:
2594   case CP_UTF8:
2595     {
2596       DWORD dwMode = 0;
2597       INT nWideCharCount = len - 1;
2598
2599       if (!ConvertINetUnicodeToMultiByte(&dwMode, CodePage, lpSrcStr, &nWideCharCount, lpDstStr,
2600                                           lpiLen))
2601         return 0;
2602
2603       if (nWideCharCount < len - 1)
2604       {
2605         mem = HeapAlloc(GetProcessHeap(), 0, *lpiLen);
2606         if (!mem)
2607           return 0;
2608
2609         *lpiLen = 0;
2610
2611         if (ConvertINetUnicodeToMultiByte(&dwMode, CodePage, lpSrcStr, &len, mem, lpiLen))
2612         {
2613           SHTruncateString(mem, *lpiLen);
2614           lstrcpynA(lpDstStr, mem, *lpiLen + 1);
2615           HeapFree(GetProcessHeap(), 0, mem);
2616           return *lpiLen + 1;
2617         }
2618         HeapFree(GetProcessHeap(), 0, mem);
2619         return *lpiLen;
2620       }
2621       lpDstStr[*lpiLen] = '\0';
2622       return *lpiLen;
2623     }
2624   default:
2625     break;
2626   }
2627
2628   reqLen = WideCharToMultiByte(CodePage, 0, lpSrcStr, len, lpDstStr,
2629                                *lpiLen, NULL, NULL);
2630
2631   if (!reqLen && GetLastError() == ERROR_INSUFFICIENT_BUFFER)
2632   {
2633     reqLen = WideCharToMultiByte(CodePage, 0, lpSrcStr, len, NULL, 0, NULL, NULL);
2634     if (reqLen)
2635     {
2636       mem = HeapAlloc(GetProcessHeap(), 0, reqLen);
2637       if (mem)
2638       {
2639         reqLen = WideCharToMultiByte(CodePage, 0, lpSrcStr, len, mem,
2640                                      reqLen, NULL, NULL);
2641
2642         reqLen = SHTruncateString(mem, *lpiLen);
2643         reqLen++;
2644
2645         lstrcpynA(lpDstStr, mem, *lpiLen);
2646
2647         HeapFree(GetProcessHeap(), 0, mem);
2648       }
2649     }
2650   }
2651   return reqLen;
2652 }
2653
2654 /*************************************************************************
2655  *      @       [SHLWAPI.217]
2656  *
2657  * Convert a Unicode string to Ascii.
2658  *
2659  * PARAMS
2660  *  lpSrcStr [I] Source Unicode string to convert
2661  *  lpDstStr [O] Destination for converted Ascii string
2662  *  iLen     [O] Length of lpDstStr in characters
2663  *
2664  * RETURNS
2665  *  See SHUnicodeToAnsiCP
2666
2667  * NOTES
2668  *  This function simply calls SHUnicodeToAnsiCP() with CodePage = CP_ACP.
2669  */
2670 INT WINAPI SHUnicodeToAnsi(LPCWSTR lpSrcStr, LPSTR lpDstStr, INT iLen)
2671 {
2672     INT myint = iLen;
2673
2674     return SHUnicodeToAnsiCP(CP_ACP, lpSrcStr, lpDstStr, &myint);
2675 }
2676
2677 /*************************************************************************
2678  *      @       [SHLWAPI.345]
2679  *
2680  * Copy one string to another.
2681  *
2682  * PARAMS
2683  *  lpszSrc [I] Source string to copy
2684  *  lpszDst [O] Destination for copy
2685  *  iLen    [I] Length of lpszDst in characters
2686  *
2687  * RETURNS
2688  *  The length of the copied string, including the terminating NUL. lpszDst
2689  *  contains iLen characters of lpszSrc.
2690  */
2691 DWORD WINAPI SHAnsiToAnsi(LPCSTR lpszSrc, LPSTR lpszDst, int iLen)
2692 {
2693     LPSTR lpszRet;
2694
2695     TRACE("(%s,%p,0x%08x)\n", debugstr_a(lpszSrc), lpszDst, iLen);
2696
2697     lpszRet = StrCpyNXA(lpszDst, lpszSrc, iLen);
2698     return lpszRet - lpszDst + 1;
2699 }
2700
2701 /*************************************************************************
2702  *      @       [SHLWAPI.346]
2703  *
2704  * Unicode version of SSHAnsiToAnsi.
2705  */
2706 DWORD WINAPI SHUnicodeToUnicode(LPCWSTR lpszSrc, LPWSTR lpszDst, int iLen)
2707 {
2708     LPWSTR lpszRet;
2709
2710     TRACE("(%s,%p,0x%08x)\n", debugstr_w(lpszSrc), lpszDst, iLen);
2711
2712     lpszRet = StrCpyNXW(lpszDst, lpszSrc, iLen);
2713     return lpszRet - lpszDst + 1;
2714 }
2715
2716 /*************************************************************************
2717  *      @       [SHLWAPI.364]
2718  *
2719  * Determine if an Ascii string converts to Unicode and back identically.
2720  *
2721  * PARAMS
2722  *  lpSrcStr [I] Source Unicode string to convert
2723  *  lpDst    [O] Destination for resulting Ascii string
2724  *  iLen     [I] Length of lpDst in characters
2725  *
2726  * RETURNS
2727  *  TRUE, since Ascii strings always convert identically.
2728  */
2729 BOOL WINAPI DoesStringRoundTripA(LPCSTR lpSrcStr, LPSTR lpDst, INT iLen)
2730 {
2731   lstrcpynA(lpDst, lpSrcStr, iLen);
2732   return TRUE;
2733 }
2734
2735 /*************************************************************************
2736  *      @       [SHLWAPI.365]
2737  *
2738  * Determine if a Unicode string converts to Ascii and back identically.
2739  *
2740  * PARAMS
2741  *  lpSrcStr [I] Source Unicode string to convert
2742  *  lpDst    [O] Destination for resulting Ascii string
2743  *  iLen     [I] Length of lpDst in characters
2744  *
2745  * RETURNS
2746  *  TRUE, if lpSrcStr converts to Ascii and back identically,
2747  *  FALSE otherwise.
2748  */
2749 BOOL WINAPI DoesStringRoundTripW(LPCWSTR lpSrcStr, LPSTR lpDst, INT iLen)
2750 {
2751     WCHAR szBuff[MAX_PATH];
2752
2753     SHUnicodeToAnsi(lpSrcStr, lpDst, iLen);
2754     SHAnsiToUnicode(lpDst, szBuff, MAX_PATH);
2755     return !strcmpW(lpSrcStr, szBuff);
2756 }
2757
2758 /*************************************************************************
2759  *      SHLoadIndirectString    [SHLWAPI.@]
2760  *
2761  * If passed a string that begins with '@', extract the string from the
2762  * appropriate resource, otherwise do a straight copy.
2763  *
2764  */
2765 HRESULT WINAPI SHLoadIndirectString(LPCWSTR src, LPWSTR dst, UINT dst_len, void **reserved)
2766 {
2767     WCHAR *dllname = NULL;
2768     HMODULE hmod = NULL;
2769     HRESULT hr = E_FAIL;
2770
2771     TRACE("(%s %p %08x %p)\n", debugstr_w(src), dst, dst_len, reserved);
2772
2773     if(src[0] == '@')
2774     {
2775         WCHAR *index_str;
2776         int index;
2777
2778         dst[0] = 0;
2779         dllname = StrDupW(src + 1);
2780         index_str = strchrW(dllname, ',');
2781
2782         if(!index_str) goto end;
2783
2784         *index_str = 0;
2785         index_str++;
2786         index = atoiW(index_str);
2787
2788         hmod = LoadLibraryW(dllname);
2789         if(!hmod) goto end;
2790
2791         if(index < 0)
2792         {
2793             if(LoadStringW(hmod, -index, dst, dst_len))
2794                 hr = S_OK;
2795         }
2796         else
2797             FIXME("can't handle non-negative indices (%d)\n", index);
2798     }
2799     else
2800     {
2801         if(dst != src)
2802             lstrcpynW(dst, src, dst_len);
2803         hr = S_OK;
2804     }
2805
2806     TRACE("returning %s\n", debugstr_w(dst));
2807 end:
2808     if(hmod) FreeLibrary(hmod);
2809     HeapFree(GetProcessHeap(), 0, dllname);
2810     return hr;
2811 }