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iconcache.c

/*
 *    shell icon cache (SIC)
 *
 * Copyright 1998, 1999 Juergen Schmied
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winreg.h"
#include "wine/debug.h"

#include "shellapi.h"
#include "objbase.h"
#include "pidl.h"
#include "shell32_main.h"
#include "undocshell.h"
#include "shresdef.h"

WINE_DEFAULT_DEBUG_CHANNEL(shell);

/********************** THE ICON CACHE ********************************/

#define INVALID_INDEX -1

typedef struct
{
      LPWSTR sSourceFile;     /* file (not path!) containing the icon */
      DWORD dwSourceIndex;    /* index within the file, if it is a resource ID it will be negated */
      DWORD dwListIndex;      /* index within the iconlist */
      DWORD dwFlags;          /* GIL_* flags */
      DWORD dwAccessTime;
} SIC_ENTRY, * LPSIC_ENTRY;

static HDPA       sic_hdpa = 0;

static CRITICAL_SECTION SHELL32_SicCS;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &SHELL32_SicCS,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { (DWORD_PTR)(__FILE__ ": SHELL32_SicCS") }
};
static CRITICAL_SECTION SHELL32_SicCS = { &critsect_debug, -1, 0, 0, 0, 0 };

/*****************************************************************************
 * SIC_CompareEntries
 *
 * NOTES
 *  Callback for DPA_Search
 */
static INT CALLBACK SIC_CompareEntries( LPVOID p1, LPVOID p2, LPARAM lparam)
{
        LPSIC_ENTRY e1 = p1, e2 = p2;

      TRACE("%p %p %8lx\n", p1, p2, lparam);

      /* Icons in the cache are keyed by the name of the file they are
       * loaded from, their resource index and the fact if they have a shortcut
       * icon overlay or not. 
       */
      if (e1->dwSourceIndex != e2->dwSourceIndex || /* first the faster one */
          (e1->dwFlags & GIL_FORSHORTCUT) != (e2->dwFlags & GIL_FORSHORTCUT)) 
        return 1;

      if (strcmpiW(e1->sSourceFile,e2->sSourceFile))
        return 1;

      return 0;
}

/* declare SIC_LoadOverlayIcon() */
static int SIC_LoadOverlayIcon(int icon_idx);

/*****************************************************************************
 * SIC_OverlayShortcutImage               [internal]
 *
 * NOTES
 *  Creates a new icon as a copy of the passed-in icon, overlayed with a
 *  shortcut image. 
 */
static HICON SIC_OverlayShortcutImage(HICON SourceIcon, BOOL large)
{     ICONINFO SourceIconInfo, ShortcutIconInfo, TargetIconInfo;
      HICON ShortcutIcon, TargetIcon;
      BITMAP SourceBitmapInfo, ShortcutBitmapInfo;
      HDC SourceDC = NULL,
        ShortcutDC = NULL,
        TargetDC = NULL,
        ScreenDC = NULL;
      HBITMAP OldSourceBitmap = NULL,
        OldShortcutBitmap = NULL,
        OldTargetBitmap = NULL;

      static int s_imgListIdx = -1;

      /* Get information about the source icon and shortcut overlay */
      if (! GetIconInfo(SourceIcon, &SourceIconInfo)
          || 0 == GetObjectW(SourceIconInfo.hbmColor, sizeof(BITMAP), &SourceBitmapInfo))
      {
        return NULL;
      }

      /* search for the shortcut icon only once */
      if (s_imgListIdx == -1)
          s_imgListIdx = SIC_LoadOverlayIcon(- IDI_SHELL_SHORTCUT);
                           /* FIXME should use icon index 29 instead of the
                              resource id, but not all icons are present yet
                              so we can't use icon indices */

      if (s_imgListIdx != -1)
      {
          if (large)
              ShortcutIcon = ImageList_GetIcon(ShellBigIconList, s_imgListIdx, ILD_TRANSPARENT);
          else
              ShortcutIcon = ImageList_GetIcon(ShellSmallIconList, s_imgListIdx, ILD_TRANSPARENT);
      } else
          ShortcutIcon = NULL;

      if (NULL == ShortcutIcon
          || ! GetIconInfo(ShortcutIcon, &ShortcutIconInfo)
          || 0 == GetObjectW(ShortcutIconInfo.hbmColor, sizeof(BITMAP), &ShortcutBitmapInfo))
      {
        return NULL;
      }

      TargetIconInfo = SourceIconInfo;
      TargetIconInfo.hbmMask = NULL;
      TargetIconInfo.hbmColor = NULL;

      /* Setup the source, shortcut and target masks */
      SourceDC = CreateCompatibleDC(NULL);
      if (NULL == SourceDC) goto fail;
      OldSourceBitmap = SelectObject(SourceDC, SourceIconInfo.hbmMask);
      if (NULL == OldSourceBitmap) goto fail;

      ShortcutDC = CreateCompatibleDC(NULL);
      if (NULL == ShortcutDC) goto fail;
      OldShortcutBitmap = SelectObject(ShortcutDC, ShortcutIconInfo.hbmMask);
      if (NULL == OldShortcutBitmap) goto fail;

      TargetDC = CreateCompatibleDC(NULL);
      if (NULL == TargetDC) goto fail;
      TargetIconInfo.hbmMask = CreateCompatibleBitmap(TargetDC, SourceBitmapInfo.bmWidth,
                                                      SourceBitmapInfo.bmHeight);
      if (NULL == TargetIconInfo.hbmMask) goto fail;
      ScreenDC = GetDC(NULL);
      if (NULL == ScreenDC) goto fail;
      TargetIconInfo.hbmColor = CreateCompatibleBitmap(ScreenDC, SourceBitmapInfo.bmWidth,
                                                       SourceBitmapInfo.bmHeight);
      ReleaseDC(NULL, ScreenDC);
      if (NULL == TargetIconInfo.hbmColor) goto fail;
      OldTargetBitmap = SelectObject(TargetDC, TargetIconInfo.hbmMask);
      if (NULL == OldTargetBitmap) goto fail;

      /* Create the target mask by ANDing the source and shortcut masks */
      if (! BitBlt(TargetDC, 0, 0, SourceBitmapInfo.bmWidth, SourceBitmapInfo.bmHeight,
                   SourceDC, 0, 0, SRCCOPY) ||
          ! BitBlt(TargetDC, 0, SourceBitmapInfo.bmHeight - ShortcutBitmapInfo.bmHeight,
                   ShortcutBitmapInfo.bmWidth, ShortcutBitmapInfo.bmHeight,
                   ShortcutDC, 0, 0, SRCAND))
      {
        goto fail;
      }

      /* Setup the source and target xor bitmap */
      if (NULL == SelectObject(SourceDC, SourceIconInfo.hbmColor) ||
          NULL == SelectObject(TargetDC, TargetIconInfo.hbmColor))
      {
        goto fail;
      }

      /* Copy the source xor bitmap to the target and clear out part of it by using
         the shortcut mask */
      if (! BitBlt(TargetDC, 0, 0, SourceBitmapInfo.bmWidth, SourceBitmapInfo.bmHeight,
                   SourceDC, 0, 0, SRCCOPY) ||
          ! BitBlt(TargetDC, 0, SourceBitmapInfo.bmHeight - ShortcutBitmapInfo.bmHeight,
                   ShortcutBitmapInfo.bmWidth, ShortcutBitmapInfo.bmHeight,
                   ShortcutDC, 0, 0, SRCAND))
      {
        goto fail;
      }

      if (NULL == SelectObject(ShortcutDC, ShortcutIconInfo.hbmColor)) goto fail;

      /* Now put in the shortcut xor mask */
      if (! BitBlt(TargetDC, 0, SourceBitmapInfo.bmHeight - ShortcutBitmapInfo.bmHeight,
                   ShortcutBitmapInfo.bmWidth, ShortcutBitmapInfo.bmHeight,
                   ShortcutDC, 0, 0, SRCINVERT))
      {
        goto fail;
      }

      /* Clean up, we're not goto'ing to 'fail' after this so we can be lazy and not set
         handles to NULL */
      SelectObject(TargetDC, OldTargetBitmap);
      DeleteObject(TargetDC);
      SelectObject(ShortcutDC, OldShortcutBitmap);
      DeleteObject(ShortcutDC);
      SelectObject(SourceDC, OldSourceBitmap);
      DeleteObject(SourceDC);

      /* Create the icon using the bitmaps prepared earlier */
      TargetIcon = CreateIconIndirect(&TargetIconInfo);

      /* CreateIconIndirect copies the bitmaps, so we can release our bitmaps now */
      DeleteObject(TargetIconInfo.hbmColor);
      DeleteObject(TargetIconInfo.hbmMask);

      return TargetIcon;

fail:
      /* Clean up scratch resources we created */
      if (NULL != OldTargetBitmap) SelectObject(TargetDC, OldTargetBitmap);
      if (NULL != TargetIconInfo.hbmColor) DeleteObject(TargetIconInfo.hbmColor);
      if (NULL != TargetIconInfo.hbmMask) DeleteObject(TargetIconInfo.hbmMask);
      if (NULL != TargetDC) DeleteObject(TargetDC);
      if (NULL != OldShortcutBitmap) SelectObject(ShortcutDC, OldShortcutBitmap);
      if (NULL != ShortcutDC) DeleteObject(ShortcutDC);
      if (NULL != OldSourceBitmap) SelectObject(SourceDC, OldSourceBitmap);
      if (NULL != SourceDC) DeleteObject(SourceDC);

      return NULL;
}

/*****************************************************************************
 * SIC_IconAppend             [internal]
 *
 * NOTES
 *  appends an icon pair to the end of the cache
 */
static INT SIC_IconAppend (LPCWSTR sSourceFile, INT dwSourceIndex, HICON hSmallIcon, HICON hBigIcon, DWORD dwFlags)
{     LPSIC_ENTRY lpsice;
      INT ret, index, index1;
      WCHAR path[MAX_PATH];
      TRACE("%s %i %p %p\n", debugstr_w(sSourceFile), dwSourceIndex, hSmallIcon ,hBigIcon);

      lpsice = SHAlloc(sizeof(SIC_ENTRY));

      GetFullPathNameW(sSourceFile, MAX_PATH, path, NULL);
      lpsice->sSourceFile = HeapAlloc( GetProcessHeap(), 0, (strlenW(path)+1)*sizeof(WCHAR) );
      strcpyW( lpsice->sSourceFile, path );

      lpsice->dwSourceIndex = dwSourceIndex;
      lpsice->dwFlags = dwFlags;

      EnterCriticalSection(&SHELL32_SicCS);

      index = DPA_InsertPtr(sic_hdpa, 0x7fff, lpsice);
      if ( INVALID_INDEX == index )
      {
        HeapFree(GetProcessHeap(), 0, lpsice->sSourceFile);
        SHFree(lpsice);
        ret = INVALID_INDEX;
      }
      else
      {
        index = ImageList_AddIcon (ShellSmallIconList, hSmallIcon);
        index1= ImageList_AddIcon (ShellBigIconList, hBigIcon);

        if (index!=index1)
        {
          FIXME("iconlists out of sync 0x%x 0x%x\n", index, index1);
        }
        lpsice->dwListIndex = index;
        ret = lpsice->dwListIndex;
      }

      LeaveCriticalSection(&SHELL32_SicCS);
      return ret;
}
/****************************************************************************
 * SIC_LoadIcon                     [internal]
 *
 * NOTES
 *  gets small/big icon by number from a file
 */
static INT SIC_LoadIcon (LPCWSTR sSourceFile, INT dwSourceIndex, DWORD dwFlags)
{     HICON hiconLarge=0;
      HICON hiconSmall=0;
      HICON       hiconLargeShortcut;
      HICON hiconSmallShortcut;

        PrivateExtractIconsW( sSourceFile, dwSourceIndex, 32, 32, &hiconLarge, 0, 1, 0 );
        PrivateExtractIconsW( sSourceFile, dwSourceIndex, 16, 16, &hiconSmall, 0, 1, 0 );

      if ( !hiconLarge ||  !hiconSmall)
      {
        WARN("failure loading icon %i from %s (%p %p)\n", dwSourceIndex, debugstr_w(sSourceFile), hiconLarge, hiconSmall);
        return -1;
      }

      if (0 != (dwFlags & GIL_FORSHORTCUT))
      {
        hiconLargeShortcut = SIC_OverlayShortcutImage(hiconLarge, TRUE);
        hiconSmallShortcut = SIC_OverlayShortcutImage(hiconSmall, FALSE);
        if (NULL != hiconLargeShortcut && NULL != hiconSmallShortcut)
        {
          hiconLarge = hiconLargeShortcut;
          hiconSmall = hiconSmallShortcut;
        }
        else
        {
          WARN("Failed to create shortcut overlayed icons\n");
          if (NULL != hiconLargeShortcut) DestroyIcon(hiconLargeShortcut);
          if (NULL != hiconSmallShortcut) DestroyIcon(hiconSmallShortcut);
          dwFlags &= ~ GIL_FORSHORTCUT;
        }
      }

      return SIC_IconAppend (sSourceFile, dwSourceIndex, hiconSmall, hiconLarge, dwFlags);
}
/*****************************************************************************
 * SIC_GetIconIndex                 [internal]
 *
 * Parameters
 *    sSourceFile [IN]  filename of file containing the icon
 *    index       [IN]  index/resID (negated) in this file
 *
 * NOTES
 *  look in the cache for a proper icon. if not available the icon is taken
 *  from the file and cached
 */
INT SIC_GetIconIndex (LPCWSTR sSourceFile, INT dwSourceIndex, DWORD dwFlags )
{
      SIC_ENTRY sice;
      INT ret, index = INVALID_INDEX;
      WCHAR path[MAX_PATH];

      TRACE("%s %i\n", debugstr_w(sSourceFile), dwSourceIndex);

      GetFullPathNameW(sSourceFile, MAX_PATH, path, NULL);
      sice.sSourceFile = path;
      sice.dwSourceIndex = dwSourceIndex;
      sice.dwFlags = dwFlags;

      EnterCriticalSection(&SHELL32_SicCS);

      if (NULL != DPA_GetPtr (sic_hdpa, 0))
      {
        /* search linear from position 0*/
        index = DPA_Search (sic_hdpa, &sice, 0, SIC_CompareEntries, 0, 0);
      }

      if ( INVALID_INDEX == index )
      {
          ret = SIC_LoadIcon (sSourceFile, dwSourceIndex, dwFlags);
      }
      else
      {
        TRACE("-- found\n");
        ret = ((LPSIC_ENTRY)DPA_GetPtr(sic_hdpa, index))->dwListIndex;
      }

      LeaveCriticalSection(&SHELL32_SicCS);
      return ret;
}
/*****************************************************************************
 * SIC_Initialize             [internal]
 */
BOOL SIC_Initialize(void)
{
      HICON       hSm, hLg;
      int         cx_small, cy_small;
      int         cx_large, cy_large;

      cx_small = GetSystemMetrics(SM_CXSMICON);
      cy_small = GetSystemMetrics(SM_CYSMICON);
      cx_large = GetSystemMetrics(SM_CXICON);
      cy_large = GetSystemMetrics(SM_CYICON);

      TRACE("\n");

      if (sic_hdpa)     /* already initialized?*/
        return TRUE;

      sic_hdpa = DPA_Create(16);

      if (!sic_hdpa)
      {
        return(FALSE);
      }

        ShellSmallIconList = ImageList_Create(cx_small,cy_small,ILC_COLOR32|ILC_MASK,0,0x20);
        ShellBigIconList = ImageList_Create(cx_large,cy_large,ILC_COLOR32|ILC_MASK,0,0x20);

        ImageList_SetBkColor(ShellSmallIconList, CLR_NONE);
        ImageList_SetBkColor(ShellBigIconList, CLR_NONE);

        /* Load the document icon, which is used as the default if an icon isn't found. */
        hSm = LoadImageA(shell32_hInstance, MAKEINTRESOURCEA(IDI_SHELL_DOCUMENT),
                                IMAGE_ICON, cx_small, cy_small, LR_SHARED);
        hLg = LoadImageA(shell32_hInstance, MAKEINTRESOURCEA(IDI_SHELL_DOCUMENT),
                                IMAGE_ICON, cx_large, cy_large, LR_SHARED);

        if (!hSm || !hLg) 
        {
          FIXME("Failed to load IDI_SHELL_DOCUMENT icon!\n");
          return FALSE;
        }

        SIC_IconAppend (swShell32Name, IDI_SHELL_DOCUMENT-1, hSm, hLg, 0);
        SIC_IconAppend (swShell32Name, -IDI_SHELL_DOCUMENT, hSm, hLg, 0);
   
      TRACE("hIconSmall=%p hIconBig=%p\n",ShellSmallIconList, ShellBigIconList);

      return TRUE;
}
/*************************************************************************
 * SIC_Destroy
 *
 * frees the cache
 */
static INT CALLBACK sic_free( LPVOID ptr, LPVOID lparam )
{
      HeapFree(GetProcessHeap(), 0, ((LPSIC_ENTRY)ptr)->sSourceFile);
      SHFree(ptr);
      return TRUE;
}

void SIC_Destroy(void)
{
      TRACE("\n");

      EnterCriticalSection(&SHELL32_SicCS);

      if (sic_hdpa) DPA_DestroyCallback(sic_hdpa, sic_free, NULL );

      sic_hdpa = NULL;
      ImageList_Destroy(ShellSmallIconList);
      ShellSmallIconList = 0;
      ImageList_Destroy(ShellBigIconList);
      ShellBigIconList = 0;

      LeaveCriticalSection(&SHELL32_SicCS);
      DeleteCriticalSection(&SHELL32_SicCS);
}

/*****************************************************************************
 * SIC_LoadOverlayIcon              [internal]
 *
 * Load a shell overlay icon and return its icon cache index.
 */
static int SIC_LoadOverlayIcon(int icon_idx)
{
      WCHAR buffer[1024], wszIdx[8];
      HKEY hKeyShellIcons;
      LPCWSTR iconPath;
      int iconIdx;

      static const WCHAR wszShellIcons[] = {
          'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
          'W','i','n','d','o','w','s','\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
          'E','x','p','l','o','r','e','r','\\','S','h','e','l','l',' ','I','c','o','n','s',0
      }; 
      static const WCHAR wszNumFmt[] = {'%','d',0};

      iconPath = swShell32Name;     /* default: load icon from shell32.dll */
      iconIdx = icon_idx;

      if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, wszShellIcons, 0, KEY_READ, &hKeyShellIcons) == ERROR_SUCCESS)
      {
          DWORD count = sizeof(buffer);

          sprintfW(wszIdx, wszNumFmt, icon_idx);

          /* read icon path and index */
          if (RegQueryValueExW(hKeyShellIcons, wszIdx, NULL, NULL, (LPBYTE)buffer, &count) == ERROR_SUCCESS)
          {
            LPWSTR p = strchrW(buffer, ',');

            if (p)
                *p++ = 0;

            iconPath = buffer;
            iconIdx = atoiW(p);
          }

          RegCloseKey(hKeyShellIcons);
      }

      return SIC_LoadIcon(iconPath, iconIdx, 0);
}

/*************************************************************************
 * Shell_GetImageList               [SHELL32.71]
 *
 * PARAMETERS
 *  imglist[1|2] [OUT] pointer which receives imagelist handles
 *
 */
BOOL WINAPI Shell_GetImageList(HIMAGELIST * lpBigList, HIMAGELIST * lpSmallList)
{     TRACE("(%p,%p)\n",lpBigList,lpSmallList);
      if (lpBigList)
      { *lpBigList = ShellBigIconList;
      }
      if (lpSmallList)
      { *lpSmallList = ShellSmallIconList;
      }

      return TRUE;
}
/*************************************************************************
 * PidlToSicIndex             [INTERNAL]
 *
 * PARAMETERS
 *    sh    [IN]  IShellFolder
 *    pidl  [IN]
 *    bBigIcon [IN]
 *    uFlags      [IN]  GIL_*
 *    pIndex      [OUT] index within the SIC
 *
 */
BOOL PidlToSicIndex (
      IShellFolder * sh,
      LPCITEMIDLIST pidl,
      BOOL bBigIcon,
      UINT uFlags,
      int * pIndex)
{
      IExtractIconW     *ei;
      WCHAR       szIconFile[MAX_PATH];   /* file containing the icon */
      INT         iSourceIndex;           /* index or resID(negated) in this file */
      BOOL        ret = FALSE;
      UINT        dwFlags = 0;
      int         iShortcutDefaultIndex = INVALID_INDEX;

      TRACE("sf=%p pidl=%p %s\n", sh, pidl, bBigIcon?"Big":"Small");

      if (SUCCEEDED (IShellFolder_GetUIObjectOf(sh, 0, 1, &pidl, &IID_IExtractIconW, 0, (void **)&ei)))
      {
        if (SUCCEEDED(IExtractIconW_GetIconLocation(ei, uFlags, szIconFile, MAX_PATH, &iSourceIndex, &dwFlags)))
        {
          *pIndex = SIC_GetIconIndex(szIconFile, iSourceIndex, uFlags);
          ret = TRUE;
        }
        IExtractIconW_Release(ei);
      }

      if (INVALID_INDEX == *pIndex) /* default icon when failed */
      {
        if (0 == (uFlags & GIL_FORSHORTCUT))
        {
          *pIndex = 0;
        }
        else
        {
          if (INVALID_INDEX == iShortcutDefaultIndex)
          {
            iShortcutDefaultIndex = SIC_LoadIcon(swShell32Name, 0, GIL_FORSHORTCUT);
          }
          *pIndex = (INVALID_INDEX != iShortcutDefaultIndex ? iShortcutDefaultIndex : 0);
        }
      }

      return ret;

}

/*************************************************************************
 * SHMapPIDLToSystemImageListIndex  [SHELL32.77]
 *
 * PARAMETERS
 *    sh    [IN]        pointer to an instance of IShellFolder
 *    pidl  [IN]
 *    pIndex      [OUT][OPTIONAL]   SIC index for big icon
 *
 */
int WINAPI SHMapPIDLToSystemImageListIndex(
      IShellFolder *sh,
      LPCITEMIDLIST pidl,
      int *pIndex)
{
      int Index;
      UINT uGilFlags = 0;

      TRACE("(SF=%p,pidl=%p,%p)\n",sh,pidl,pIndex);
      pdump(pidl);

      if (SHELL_IsShortcut(pidl))
          uGilFlags |= GIL_FORSHORTCUT;

      if (pIndex)
          if (!PidlToSicIndex ( sh, pidl, 1, uGilFlags, pIndex))
              *pIndex = -1;

      if (!PidlToSicIndex ( sh, pidl, 0, uGilFlags, &Index))
          return -1;

      return Index;
}

/*************************************************************************
 * SHMapIDListToImageListIndexAsync  [SHELL32.148]
 */
HRESULT WINAPI SHMapIDListToImageListIndexAsync(IUnknown *pts, IShellFolder *psf,
                                                LPCITEMIDLIST pidl, UINT flags,
                                                void *pfn, void *pvData, void *pvHint,
                                                int *piIndex, int *piIndexSel)
{
    FIXME("(%p, %p, %p, 0x%08x, %p, %p, %p, %p, %p)\n",
            pts, psf, pidl, flags, pfn, pvData, pvHint, piIndex, piIndexSel);
    return E_FAIL;
}

/*************************************************************************
 * Shell_GetCachedImageIndex        [SHELL32.72]
 *
 */
static INT Shell_GetCachedImageIndexA(LPCSTR szPath, INT nIndex, BOOL bSimulateDoc)
{
      INT ret, len;
      LPWSTR szTemp;

      WARN("(%s,%08x,%08x) semi-stub.\n",debugstr_a(szPath), nIndex, bSimulateDoc);

      len = MultiByteToWideChar( CP_ACP, 0, szPath, -1, NULL, 0 );
      szTemp = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
      MultiByteToWideChar( CP_ACP, 0, szPath, -1, szTemp, len );

      ret = SIC_GetIconIndex( szTemp, nIndex, 0 );

      HeapFree( GetProcessHeap(), 0, szTemp );

      return ret;
}

static INT Shell_GetCachedImageIndexW(LPCWSTR szPath, INT nIndex, BOOL bSimulateDoc)
{
      WARN("(%s,%08x,%08x) semi-stub.\n",debugstr_w(szPath), nIndex, bSimulateDoc);

      return SIC_GetIconIndex(szPath, nIndex, 0);
}

INT WINAPI Shell_GetCachedImageIndexAW(LPCVOID szPath, INT nIndex, BOOL bSimulateDoc)
{     if( SHELL_OsIsUnicode())
        return Shell_GetCachedImageIndexW(szPath, nIndex, bSimulateDoc);
      return Shell_GetCachedImageIndexA(szPath, nIndex, bSimulateDoc);
}

/*************************************************************************
 * ExtractIconExW             [SHELL32.@]
 * RETURNS
 *  0 no icon found
 *  -1 file is not valid
 *  or number of icons extracted
 */
UINT WINAPI ExtractIconExW(LPCWSTR lpszFile, INT nIconIndex, HICON * phiconLarge, HICON * phiconSmall, UINT nIcons)
{
      TRACE("%s %i %p %p %i\n", debugstr_w(lpszFile), nIconIndex, phiconLarge, phiconSmall, nIcons);

      return PrivateExtractIconExW(lpszFile, nIconIndex, phiconLarge, phiconSmall, nIcons);
}

/*************************************************************************
 * ExtractIconExA             [SHELL32.@]
 */
UINT WINAPI ExtractIconExA(LPCSTR lpszFile, INT nIconIndex, HICON * phiconLarge, HICON * phiconSmall, UINT nIcons)
{
    UINT ret = 0;
    INT len = MultiByteToWideChar(CP_ACP, 0, lpszFile, -1, NULL, 0);
    LPWSTR lpwstrFile = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));

    TRACE("%s %i %p %p %i\n", lpszFile, nIconIndex, phiconLarge, phiconSmall, nIcons);

    if (lpwstrFile)
    {
        MultiByteToWideChar(CP_ACP, 0, lpszFile, -1, lpwstrFile, len);
        ret = ExtractIconExW(lpwstrFile, nIconIndex, phiconLarge, phiconSmall, nIcons);
        HeapFree(GetProcessHeap(), 0, lpwstrFile);
    }
    return ret;
}

/*************************************************************************
 *                      ExtractAssociatedIconA (SHELL32.@)
 *
 * Return icon for given file (either from file itself or from associated
 * executable) and patch parameters if needed.
 */
HICON WINAPI ExtractAssociatedIconA(HINSTANCE hInst, LPSTR lpIconPath, LPWORD lpiIcon)
{     
    HICON hIcon = NULL;
    INT len = MultiByteToWideChar(CP_ACP, 0, lpIconPath, -1, NULL, 0);
    /* Note that we need to allocate MAX_PATH, since we are supposed to fill
     * the correct executable if there is no icon in lpIconPath directly.
     * lpIconPath itself is supposed to be large enough, so make sure lpIconPathW
     * is large enough too. Yes, I am puking too.
     */
    LPWSTR lpIconPathW = HeapAlloc(GetProcessHeap(), 0, MAX_PATH * sizeof(WCHAR));

    TRACE("%p %s %p\n", hInst, debugstr_a(lpIconPath), lpiIcon);

    if (lpIconPathW)
    {
        MultiByteToWideChar(CP_ACP, 0, lpIconPath, -1, lpIconPathW, len);
        hIcon = ExtractAssociatedIconW(hInst, lpIconPathW, lpiIcon);
        WideCharToMultiByte(CP_ACP, 0, lpIconPathW, -1, lpIconPath, MAX_PATH , NULL, NULL);
        HeapFree(GetProcessHeap(), 0, lpIconPathW);
    }
    return hIcon;
}

/*************************************************************************
 *                      ExtractAssociatedIconW (SHELL32.@)
 *
 * Return icon for given file (either from file itself or from associated
 * executable) and patch parameters if needed.
 */
HICON WINAPI ExtractAssociatedIconW(HINSTANCE hInst, LPWSTR lpIconPath, LPWORD lpiIcon)
{
    HICON hIcon = NULL;
    WORD wDummyIcon = 0;

    TRACE("%p %s %p\n", hInst, debugstr_w(lpIconPath), lpiIcon);

    if(lpiIcon == NULL)
        lpiIcon = &wDummyIcon;

    hIcon = ExtractIconW(hInst, lpIconPath, *lpiIcon);

    if( hIcon < (HICON)2 )
    { if( hIcon == (HICON)1 ) /* no icons found in given file */
      { WCHAR tempPath[MAX_PATH];
        HINSTANCE uRet = FindExecutableW(lpIconPath,NULL,tempPath);

        if( uRet > (HINSTANCE)32 && tempPath[0] )
        { lstrcpyW(lpIconPath,tempPath);
          hIcon = ExtractIconW(hInst, lpIconPath, *lpiIcon);
          if( hIcon > (HICON)2 )
            return hIcon;
        }
      }

      if( hIcon == (HICON)1 )
        *lpiIcon = 2;   /* MSDOS icon - we found .exe but no icons in it */
      else
        *lpiIcon = 6;   /* generic icon - found nothing */

      if (GetModuleFileNameW(hInst, lpIconPath, MAX_PATH))
        hIcon = LoadIconW(hInst, MAKEINTRESOURCEW(*lpiIcon));
    }
    return hIcon;
}

/*************************************************************************
 *                      ExtractAssociatedIconExW (SHELL32.@)
 *
 * Return icon for given file (either from file itself or from associated
 * executable) and patch parameters if needed.
 */
HICON WINAPI ExtractAssociatedIconExW(HINSTANCE hInst, LPWSTR lpIconPath, LPWORD lpiIconIdx, LPWORD lpiIconId)
{
  FIXME("%p %s %p %p): stub\n", hInst, debugstr_w(lpIconPath), lpiIconIdx, lpiIconId);
  return 0;
}

/*************************************************************************
 *                      ExtractAssociatedIconExA (SHELL32.@)
 *
 * Return icon for given file (either from file itself or from associated
 * executable) and patch parameters if needed.
 */
HICON WINAPI ExtractAssociatedIconExA(HINSTANCE hInst, LPSTR lpIconPath, LPWORD lpiIconIdx, LPWORD lpiIconId)
{
  HICON ret;
  INT len = MultiByteToWideChar( CP_ACP, 0, lpIconPath, -1, NULL, 0 );
  LPWSTR lpwstrFile = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );

  TRACE("%p %s %p %p)\n", hInst, lpIconPath, lpiIconIdx, lpiIconId);

  MultiByteToWideChar( CP_ACP, 0, lpIconPath, -1, lpwstrFile, len );
  ret = ExtractAssociatedIconExW(hInst, lpwstrFile, lpiIconIdx, lpiIconId);
  HeapFree(GetProcessHeap(), 0, lpwstrFile);
  return ret;
}


/****************************************************************************
 * SHDefExtractIconW          [SHELL32.@]
 */
HRESULT WINAPI SHDefExtractIconW(LPCWSTR pszIconFile, int iIndex, UINT uFlags,
                                 HICON* phiconLarge, HICON* phiconSmall, UINT nIconSize)
{
      UINT ret;
      HICON hIcons[2];
      WARN("%s %d 0x%08x %p %p %d, semi-stub\n", debugstr_w(pszIconFile), iIndex, uFlags, phiconLarge, phiconSmall, nIconSize);

      ret = PrivateExtractIconsW(pszIconFile, iIndex, nIconSize, nIconSize, hIcons, NULL, 2, LR_DEFAULTCOLOR);
      /* FIXME: deal with uFlags parameter which contains GIL_ flags */
      if (ret == 0xFFFFFFFF)
        return E_FAIL;
      if (ret > 0) {
        if (phiconLarge)
          *phiconLarge = hIcons[0];
        else
          DestroyIcon(hIcons[0]);
        if (phiconSmall)
          *phiconSmall = hIcons[1];
        else
          DestroyIcon(hIcons[1]);
        return S_OK;
      }
      return S_FALSE;
}

/****************************************************************************
 * SHDefExtractIconA          [SHELL32.@]
 */
HRESULT WINAPI SHDefExtractIconA(LPCSTR pszIconFile, int iIndex, UINT uFlags,
                                 HICON* phiconLarge, HICON* phiconSmall, UINT nIconSize)
{
  HRESULT ret;
  INT len = MultiByteToWideChar(CP_ACP, 0, pszIconFile, -1, NULL, 0);
  LPWSTR lpwstrFile = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));

  TRACE("%s %d 0x%08x %p %p %d\n", pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize);

  MultiByteToWideChar(CP_ACP, 0, pszIconFile, -1, lpwstrFile, len);
  ret = SHDefExtractIconW(lpwstrFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize);
  HeapFree(GetProcessHeap(), 0, lpwstrFile);
  return ret;
}


/****************************************************************************
 * SHGetIconOverlayIndexA    [SHELL32.@]
 *
 * Returns the index of the overlay icon in the system image list.
 */
INT WINAPI SHGetIconOverlayIndexA(LPCSTR pszIconPath, INT iIconIndex)
{
  FIXME("%s, %d\n", debugstr_a(pszIconPath), iIconIndex);

  return -1;
}

/****************************************************************************
 * SHGetIconOverlayIndexW    [SHELL32.@]
 *
 * Returns the index of the overlay icon in the system image list.
 */
INT WINAPI SHGetIconOverlayIndexW(LPCWSTR pszIconPath, INT iIconIndex)
{
  FIXME("%s, %d\n", debugstr_w(pszIconPath), iIconIndex);

  return -1;
}

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