dlls/shell32/shlfolder.c

   1 /*
   2  *      Shell Folder stuff
   3  *
   4  *      Copyright 1997                  Marcus Meissner
   5  *      Copyright 1998, 1999, 2002      Juergen Schmied
   6  *
   7  *      IShellFolder2 and related interfaces
   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 #include "config.h"
  25 #include "wine/port.h"
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #define COBJMACROS
  33 #define NONAMELESSUNION
  34 #define NONAMELESSSTRUCT
  35
  36 #include "winerror.h"
  37 #include "windef.h"
  38 #include "winbase.h"
  39 #include "winreg.h"
  40 #include "wingdi.h"
  41 #include "winuser.h"
  42
  43 #include "ole2.h"
  44 #include "shlguid.h"
  45
  46 #include "pidl.h"
  47 #include "undocshell.h"
  48 #include "shell32_main.h"
  49 #include "shlwapi.h"
  50 #include "wine/debug.h"
  51 #include "shfldr.h"
  52
  53 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  54
  55 static const WCHAR wszDotShellClassInfo[] = {
  56     '.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0};
  57
  58 /***************************************************************************
  59  *  SHELL32_GetCustomFolderAttribute (internal function)
  60  *
  61  * Gets a value from the folder's desktop.ini file, if one exists.
  62  *
  63  * PARAMETERS
  64  *  pidl          [I] Folder containing the desktop.ini file.
  65  *  pwszHeading   [I] Heading in .ini file.
  66  *  pwszAttribute [I] Attribute in .ini file.
  67  *  pwszValue     [O] Buffer to store value into.
  68  *  cchValue      [I] Size in characters including NULL of buffer pointed to
  69  *                    by pwszValue.
  70  *
  71  *  RETURNS
  72  *    TRUE if returned non-NULL value.
  73  *    FALSE otherwise.
  74  */
  75 static inline BOOL SHELL32_GetCustomFolderAttributeFromPath(
  76     LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  77     LPWSTR pwszValue, DWORD cchValue)
  78 {
  79     static const WCHAR wszDesktopIni[] =
  80             {'d','e','s','k','t','o','p','.','i','n','i',0};
  81     static const WCHAR wszDefault[] = {0};
  82
  83     PathAddBackslashW(pwszFolderPath);
  84     PathAppendW(pwszFolderPath, wszDesktopIni);
  85     return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
  86                                     pwszValue, cchValue, pwszFolderPath);
  87 }
  88
  89 BOOL SHELL32_GetCustomFolderAttribute(
  90     LPCITEMIDLIST pidl, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  91     LPWSTR pwszValue, DWORD cchValue)
  92 {
  93     DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
  94     WCHAR wszFolderPath[MAX_PATH];
  95
  96     /* Hack around not having system attribute on non-Windows file systems */
  97     if (0)
  98         dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
  99
 100     if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
 101     {
 102         if (!SHGetPathFromIDListW(pidl, wszFolderPath))
 103             return FALSE;
 104
 105         return SHELL32_GetCustomFolderAttributeFromPath(wszFolderPath, pwszHeading,
 106                                                 pwszAttribute, pwszValue, cchValue);
 107     }
 108     return FALSE;
 109 }
 110
 111 /***************************************************************************
 112  *  GetNextElement (internal function)
 113  *
 114  * Gets a part of a string till the first backslash.
 115  *
 116  * PARAMETERS
 117  *  pszNext [IN] string to get the element from
 118  *  pszOut  [IN] pointer to buffer which receives string
 119  *  dwOut   [IN] length of pszOut
 120  *
 121  *  RETURNS
 122  *    LPSTR pointer to first, not yet parsed char
 123  */
 124
 125 LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
 126 {
 127     LPCWSTR pszTail = pszNext;
 128     DWORD dwCopy;
 129
 130     TRACE ("(%s %p 0x%08x)\n", debugstr_w(pszNext), pszOut, dwOut);
 131
 132     *pszOut = 0;
 133
 134     if (!pszNext || !*pszNext)
 135         return NULL;
 136
 137     while (*pszTail && (*pszTail != (WCHAR) '\\'))
 138         pszTail++;
 139
 140     dwCopy = pszTail - pszNext + 1;
 141     lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
 142
 143     if (*pszTail)
 144         pszTail++;
 145     else
 146         pszTail = NULL;
 147
 148     TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
 149     return pszTail;
 150 }
 151
 152 HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
 153                                   LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
 154 {
 155     LPITEMIDLIST pidlOut = NULL, pidlTemp = NULL;
 156     IShellFolder *psfChild;
 157     HRESULT hr;
 158
 159     TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlInOut ? *pidlInOut : NULL, debugstr_w (szNext));
 160
 161     /* get the shellfolder for the child pidl and let it analyse further */
 162     hr = IShellFolder_BindToObject (psf, *pidlInOut, pbc, &IID_IShellFolder, (LPVOID *) & psfChild);
 163
 164     if (SUCCEEDED(hr)) {
 165         hr = IShellFolder_ParseDisplayName (psfChild, hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
 166         IShellFolder_Release (psfChild);
 167
 168         if (SUCCEEDED(hr)) {
 169             pidlTemp = ILCombine (*pidlInOut, pidlOut);
 170
 171             if (!pidlTemp)
 172                 hr = E_OUTOFMEMORY;
 173         }
 174
 175         if (pidlOut)
 176             ILFree (pidlOut);
 177     }
 178
 179     ILFree (*pidlInOut);
 180     *pidlInOut = pidlTemp;
 181
 182     TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
 183     return hr;
 184 }
 185
 186 /***********************************************************************
 187  *      SHELL32_CoCreateInitSF
 188  *
 189  * Creates a shell folder and initializes it with a pidl and a root folder
 190  * via IPersistFolder3 or IPersistFolder.
 191  *
 192  * NOTES
 193  *   pathRoot can be NULL for Folders being a drive.
 194  *   In this case the absolute path is built from pidlChild (eg. C:)
 195  */
 196 static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
 197                 LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
 198 {
 199     HRESULT hr;
 200
 201     TRACE ("(%p %s %p %s %p)\n", pidlRoot, debugstr_w(pathRoot), pidlChild, debugstr_guid(clsid), ppvOut);
 202
 203     hr = SHCoCreateInstance(NULL, clsid, NULL, &IID_IShellFolder, ppvOut);
 204     if (SUCCEEDED (hr))
 205     {
 206         LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
 207         IPersistFolder *pPF;
 208         IPersistFolder3 *ppf;
 209
 210         if (_ILIsFolder(pidlChild) &&
 211             SUCCEEDED (IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder3, (LPVOID *) & ppf)))
 212         {
 213             PERSIST_FOLDER_TARGET_INFO ppfti;
 214
 215             ZeroMemory (&ppfti, sizeof (ppfti));
 216
 217             /* fill the PERSIST_FOLDER_TARGET_INFO */
 218             ppfti.dwAttributes = -1;
 219             ppfti.csidl = -1;
 220
 221             /* build path */
 222             if (pathRoot) {
 223                 lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
 224                 PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
 225             }
 226
 227             if (pidlChild) {
 228                 int len = lstrlenW(ppfti.szTargetParsingName);
 229
 230                 if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
 231                         hr = E_INVALIDARG;
 232             }
 233
 234             IPersistFolder3_InitializeEx (ppf, NULL, pidlAbsolute, &ppfti);
 235             IPersistFolder3_Release (ppf);
 236         }
 237         else if (SUCCEEDED ((hr = IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder, (LPVOID *) & pPF)))) {
 238             IPersistFolder_Initialize (pPF, pidlAbsolute);
 239             IPersistFolder_Release (pPF);
 240         }
 241         ILFree (pidlAbsolute);
 242     }
 243     TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
 244     return hr;
 245 }
 246
 247 /***********************************************************************
 248  *      SHELL32_BindToChild [Internal]
 249  *
 250  * Common code for IShellFolder_BindToObject.
 251  *
 252  * PARAMS
 253  *  pidlRoot     [I] The parent shell folder's absolute pidl.
 254  *  pathRoot     [I] Absolute dos path of the parent shell folder.
 255  *  pidlComplete [I] PIDL of the child. Relative to pidlRoot.
 256  *  riid         [I] GUID of the interface, which ppvOut shall be bound to.
 257  *  ppvOut       [O] A reference to the child's interface (riid).
 258  *
 259  * NOTES
 260  *  pidlComplete has to contain at least one non empty SHITEMID.
 261  *  This function makes special assumptions on the shell namespace, which
 262  *  means you probably can't use it for your IShellFolder implementation.
 263  */
 264 HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
 265                              LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
 266 {
 267     GUID const *clsid;
 268     IShellFolder *pSF;
 269     HRESULT hr;
 270     LPITEMIDLIST pidlChild;
 271
 272     TRACE("(%p %s %p %s %p)\n", pidlRoot, debugstr_w(pathRoot), pidlComplete, debugstr_guid(riid), ppvOut);
 273
 274     if (!pidlRoot || !ppvOut || !pidlComplete || !pidlComplete->mkid.cb)
 275         return E_INVALIDARG;
 276
 277     *ppvOut = NULL;
 278
 279     pidlChild = ILCloneFirst (pidlComplete);
 280
 281     if ((clsid = _ILGetGUIDPointer (pidlChild))) {
 282         /* virtual folder */
 283         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, clsid, (LPVOID *)&pSF);
 284     } else {
 285         /* file system folder */
 286         CLSID clsidFolder = CLSID_ShellFSFolder;
 287         static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
 288         WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
 289
 290         /* see if folder CLSID should be overridden by desktop.ini file */
 291         if (pathRoot) {
 292             lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
 293             pwszPathTail = PathAddBackslashW(wszFolderPath);
 294         }
 295
 296         _ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
 297
 298         if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
 299             wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
 300             CLSIDFromString (wszCLSIDValue, &clsidFolder);
 301
 302         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
 303                                      &clsidFolder, (LPVOID *)&pSF);
 304     }
 305     ILFree (pidlChild);
 306
 307     if (SUCCEEDED (hr)) {
 308         if (_ILIsPidlSimple (pidlComplete)) {
 309             /* no sub folders */
 310             hr = IShellFolder_QueryInterface (pSF, riid, ppvOut);
 311         } else {
 312             /* go deeper */
 313             hr = IShellFolder_BindToObject (pSF, ILGetNext (pidlComplete), NULL, riid, ppvOut);
 314         }
 315         IShellFolder_Release (pSF);
 316     }
 317
 318     TRACE ("-- returning (%p) 0x%08x\n", *ppvOut, hr);
 319
 320     return hr;
 321 }
 322
 323 /***********************************************************************
 324  *      SHELL32_GetDisplayNameOfChild
 325  *
 326  * Retrieves the display name of a child object of a shellfolder.
 327  *
 328  * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 329  * - it binds to the child shellfolder [subpidl1]
 330  * - asks it for the displayname of [subpidl2][subpidl3]
 331  *
 332  * Is possible the pidl is a simple pidl. In this case it asks the
 333  * subfolder for the displayname of an empty pidl. The subfolder
 334  * returns the own displayname eg. "::{guid}". This is used for
 335  * virtual folders with the registry key WantsFORPARSING set.
 336  */
 337 HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 338                                        LPCITEMIDLIST pidl, DWORD dwFlags, LPWSTR szOut, DWORD dwOutLen)
 339 {
 340     LPITEMIDLIST pidlFirst;
 341     HRESULT hr;
 342
 343     TRACE ("(%p)->(pidl=%p 0x%08x %p 0x%08x)\n", psf, pidl, dwFlags, szOut, dwOutLen);
 344     pdump (pidl);
 345
 346     pidlFirst = ILCloneFirst (pidl);
 347     if (pidlFirst) {
 348         IShellFolder2 *psfChild;
 349
 350         hr = IShellFolder_BindToObject (psf, pidlFirst, NULL, &IID_IShellFolder, (LPVOID *) & psfChild);
 351         if (SUCCEEDED (hr)) {
 352             STRRET strTemp;
 353             LPITEMIDLIST pidlNext = ILGetNext (pidl);
 354
 355             hr = IShellFolder_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
 356             if (SUCCEEDED (hr)) {
 357                 if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
 358                     hr = E_FAIL;
 359             }
 360             IShellFolder_Release (psfChild);
 361         }
 362         ILFree (pidlFirst);
 363     } else
 364         hr = E_OUTOFMEMORY;
 365
 366     TRACE ("-- ret=0x%08x %s\n", hr, debugstr_w(szOut));
 367
 368     return hr;
 369 }
 370
 371 /***********************************************************************
 372  *  SHELL32_GetItemAttributes
 373  *
 374  * NOTES
 375  * Observed values:
 376  *  folder:     0xE0000177      FILESYSTEM | HASSUBFOLDER | FOLDER
 377  *  file:       0x40000177      FILESYSTEM
 378  *  drive:      0xf0000144      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 379  *  mycomputer: 0xb0000154      HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 380  *  (seems to be default for shell extensions if no registry entry exists)
 381  *
 382  * win2k:
 383  *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 384  *  file:      0x40400177      FILESYSTEM | CANMONIKER
 385  *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 386  *
 387  * According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
 388  * However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
 389  */
 390 HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 391 {
 392     DWORD dwAttributes;
 393     BOOL has_guid;
 394     static const DWORD dwSupportedAttr=
 395                           SFGAO_CANCOPY |           /*0x00000001 */
 396                           SFGAO_CANMOVE |           /*0x00000002 */
 397                           SFGAO_CANLINK |           /*0x00000004 */
 398                           SFGAO_CANRENAME |         /*0x00000010 */
 399                           SFGAO_CANDELETE |         /*0x00000020 */
 400                           SFGAO_HASPROPSHEET |      /*0x00000040 */
 401                           SFGAO_DROPTARGET |        /*0x00000100 */
 402                           SFGAO_LINK |              /*0x00010000 */
 403                           SFGAO_READONLY |          /*0x00040000 */
 404                           SFGAO_HIDDEN |            /*0x00080000 */
 405                           SFGAO_FILESYSANCESTOR |   /*0x10000000 */
 406                           SFGAO_FOLDER |            /*0x20000000 */
 407                           SFGAO_FILESYSTEM |        /*0x40000000 */
 408                           SFGAO_HASSUBFOLDER;       /*0x80000000 */
 409
 410     TRACE ("0x%08x\n", *pdwAttributes);
 411
 412     if (*pdwAttributes & ~dwSupportedAttr)
 413     {
 414         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 415         *pdwAttributes &= dwSupportedAttr;
 416     }
 417
 418     has_guid = _ILGetGUIDPointer(pidl) != NULL;
 419
 420     dwAttributes = *pdwAttributes;
 421
 422     if (_ILIsDrive (pidl)) {
 423         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FILESYSTEM|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|
 424             SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANLINK;
 425     } else if (has_guid && HCR_GetFolderAttributes(pidl, &dwAttributes)) {
 426         *pdwAttributes = dwAttributes;
 427     } else if (_ILGetDataPointer (pidl)) {
 428         dwAttributes = _ILGetFileAttributes (pidl, NULL, 0);
 429
 430         if (!dwAttributes && has_guid) {
 431             WCHAR path[MAX_PATH];
 432             STRRET strret;
 433
 434             /* File attributes are not present in the internal PIDL structure, so get them from the file system. */
 435
 436             HRESULT hr = IShellFolder_GetDisplayNameOf(psf, pidl, SHGDN_FORPARSING, &strret);
 437
 438             if (SUCCEEDED(hr)) {
 439                 hr = StrRetToBufW(&strret, pidl, path, MAX_PATH);
 440
 441                 /* call GetFileAttributes() only for file system paths, not for parsing names like "::{...}" */
 442                 if (SUCCEEDED(hr) && path[0]!=':')
 443                     dwAttributes = GetFileAttributesW(path);
 444             }
 445         }
 446
 447         /* Set common attributes */
 448         *pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
 449                           SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
 450
 451         if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
 452             *pdwAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 453         else
 454             *pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 455
 456         if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
 457             *pdwAttributes |=  SFGAO_HIDDEN;
 458         else
 459             *pdwAttributes &= ~SFGAO_HIDDEN;
 460
 461         if (dwAttributes & FILE_ATTRIBUTE_READONLY)
 462             *pdwAttributes |=  SFGAO_READONLY;
 463         else
 464             *pdwAttributes &= ~SFGAO_READONLY;
 465
 466         if (SFGAO_LINK & *pdwAttributes) {
 467             char ext[MAX_PATH];
 468
 469             if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
 470                 *pdwAttributes &= ~SFGAO_LINK;
 471         }
 472     } else {
 473         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
 474     }
 475     TRACE ("-- 0x%08x\n", *pdwAttributes);
 476     return S_OK;
 477 }
 478
 479 /***********************************************************************
 480  *  SHELL32_CompareIDs
 481  */
 482 HRESULT SHELL32_CompareIDs (IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
 483 {
 484     int type1,
 485       type2;
 486     char szTemp1[MAX_PATH];
 487     char szTemp2[MAX_PATH];
 488     HRESULT nReturn;
 489     LPITEMIDLIST firstpidl,
 490       nextpidl1,
 491       nextpidl2;
 492     IShellFolder *psf;
 493
 494     /* test for empty pidls */
 495     BOOL isEmpty1 = _ILIsDesktop (pidl1);
 496     BOOL isEmpty2 = _ILIsDesktop (pidl2);
 497
 498     if (isEmpty1 && isEmpty2)
 499         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 500     if (isEmpty1)
 501         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 502     if (isEmpty2)
 503         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 504
 505     /* test for different types. Sort order is the PT_* constant */
 506     type1 = _ILGetDataPointer (pidl1)->type;
 507     type2 = _ILGetDataPointer (pidl2)->type;
 508     if (type1 < type2)
 509         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 510     else if (type1 > type2)
 511         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 512
 513     /* test for name of pidl */
 514     _ILSimpleGetText (pidl1, szTemp1, MAX_PATH);
 515     _ILSimpleGetText (pidl2, szTemp2, MAX_PATH);
 516     nReturn = lstrcmpiA (szTemp1, szTemp2);
 517     if (nReturn < 0)
 518         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 519     else if (nReturn > 0)
 520         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 521
 522     /* test of complex pidls */
 523     firstpidl = ILCloneFirst (pidl1);
 524     nextpidl1 = ILGetNext (pidl1);
 525     nextpidl2 = ILGetNext (pidl2);
 526
 527     /* optimizing: test special cases and bind not deeper */
 528     /* the deeper shellfolder would do the same */
 529     isEmpty1 = _ILIsDesktop (nextpidl1);
 530     isEmpty2 = _ILIsDesktop (nextpidl2);
 531
 532     if (isEmpty1 && isEmpty2) {
 533         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 534     } else if (isEmpty1) {
 535         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 536     } else if (isEmpty2) {
 537         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 538     /* optimizing end */
 539     } else if (SUCCEEDED (IShellFolder_BindToObject (iface, firstpidl, NULL, &IID_IShellFolder, (LPVOID *) & psf))) {
 540         nReturn = IShellFolder_CompareIDs (psf, lParam, nextpidl1, nextpidl2);
 541         IShellFolder_Release (psf);
 542     }
 543     ILFree (firstpidl);
 544     return nReturn;
 545 }
 546
 547 HRESULT SHELL32_GetColumnDetails(const shvheader *data, int column, SHELLDETAILS *details)
 548 {
 549     details->fmt = data[column].fmt;
 550     details->cxChar = data[column].cxChar;
 551
 552     if (SHELL_OsIsUnicode())
 553     {
 554         details->str.u.pOleStr = CoTaskMemAlloc(MAX_PATH * sizeof(WCHAR));
 555         if (!details->str.u.pOleStr) return E_OUTOFMEMORY;
 556
 557         details->str.uType = STRRET_WSTR;
 558         LoadStringW(shell32_hInstance, data[column].colnameid, details->str.u.pOleStr, MAX_PATH);
 559     }
 560     else
 561     {
 562         details->str.uType = STRRET_CSTR;
 563         LoadStringA(shell32_hInstance, data[column].colnameid, details->str.u.cStr, MAX_PATH);
 564     }
 565
 566     return S_OK;
 567 }
 568
 569 /***********************************************************************
 570  *  SHCreateLinks
 571  *
 572  *   Undocumented.
 573  */
 574 HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, LPDATAOBJECT lpDataObject,
 575                               UINT uFlags, LPITEMIDLIST *lppidlLinks)
 576 {
 577     FIXME("%p %s %p %08x %p\n",hWnd,lpszDir,lpDataObject,uFlags,lppidlLinks);
 578     return E_NOTIMPL;
 579 }