exticon.c

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/*
 *  icon extracting
 *
 * taken and slightly changed from shell
 * this should replace the icon extraction code in shell32 and shell16 once
 * it needs a serious test for compliance with the native API
 *
 * Copyright 2000 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 <user32.h>
 
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif
 
/* Start of Hack section */
 
WINE_DEFAULT_DEBUG_CHANNEL(icon);
 
#include <pshpack1.h>
 
typedef struct
{
    BYTE        bWidth;          /* Width, in pixels, of the image  */
    BYTE        bHeight;         /* Height, in pixels, of the image */
    BYTE        bColorCount;     /* Number of colors in image (0 if >=8bpp) */
    BYTE        bReserved;       /* Reserved ( must be 0)       */
    WORD        wPlanes;         /* Color Planes            */
    WORD        wBitCount;       /* Bits per pixel          */
    DWORD       dwBytesInRes;    /* How many bytes in this resource?    */
    DWORD       dwImageOffset;   /* Where in the file is this image?    */
} icoICONDIRENTRY, *LPicoICONDIRENTRY;
 
typedef struct
{
    WORD            idReserved;   /* Reserved (must be 0) */
    WORD            idType;       /* Resource Type (RES_ICON or RES_CURSOR) */
    WORD            idCount;      /* How many images */
    icoICONDIRENTRY idEntries[1]; /* An entry for each image (idCount of 'em) */
} icoICONDIR, *LPicoICONDIR;
 
typedef struct
{
    WORD offset;
    WORD length;
    WORD flags;
    WORD id;
    WORD handle;
    WORD usage;
} NE_NAMEINFO;
 
typedef struct
{
    WORD  type_id;
    WORD  count;
    DWORD resloader;
} NE_TYPEINFO;
 
#ifdef __REACTOS__
//  From: James Houghtaling
//  https://www.moon-soft.com/program/FORMAT/windows/ani.htm
typedef struct taganiheader
{
    DWORD cbsizeof;  // num bytes in aniheader (36 bytes)
    DWORD cframes;   // number of unique icons in this cursor
    DWORD csteps;    // number of blits before the animation cycles
    DWORD cx;        // reserved, must be zero.
    DWORD cy;        // reserved, must be zero.
    DWORD cbitcount; // reserved, must be zero.
    DWORD cplanes;   // reserved, must be zero.
    DWORD jifrate;   // default jiffies (1/60th sec) if rate chunk not present.
    DWORD flags;     // animation flag
} aniheader;
#endif
 
#define NE_RSCTYPE_ICON        0x8003
#define NE_RSCTYPE_GROUP_ICON  0x800e
 
#include <poppack.h>
 
#if 0
static void dumpIcoDirEnty ( LPicoICONDIRENTRY entry )
{
    TRACE("width = 0x%08x height = 0x%08x\n", entry->bWidth, entry->bHeight);
    TRACE("colors = 0x%08x planes = 0x%08x\n", entry->bColorCount, entry->wPlanes);
    TRACE("bitcount = 0x%08x bytesinres = 0x%08lx offset = 0x%08lx\n",
    entry->wBitCount, entry->dwBytesInRes, entry->dwImageOffset);
}
static void dumpIcoDir ( LPicoICONDIR entry )
{
    TRACE("type = 0x%08x count = 0x%08x\n", entry->idType, entry->idCount);
}
#endif
 
#ifndef WINE
DWORD get_best_icon_file_offset(const LPBYTE dir,
                                DWORD dwFileSize,
                                int cxDesired,
                                int cyDesired,
                                BOOL bIcon,
                                DWORD fuLoad,
                                POINT *ptHotSpot);
#endif
 
/**********************************************************************
 *  find_entry_by_id
 *
 * Find an entry by id in a resource directory
 * Copied from loader/pe_resource.c (FIXME: should use exported resource functions)
 */
static const IMAGE_RESOURCE_DIRECTORY *find_entry_by_id( const IMAGE_RESOURCE_DIRECTORY *dir,
                                                         WORD id, const void *root )
{
    const IMAGE_RESOURCE_DIRECTORY_ENTRY *entry;
    int min, max, pos;
 
    entry = (const IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
    min = dir->NumberOfNamedEntries;
    max = min + dir->NumberOfIdEntries - 1;
    while (min <= max)
    {
        pos = (min + max) / 2;
        if (entry[pos].Id == id)
            return (const IMAGE_RESOURCE_DIRECTORY *)((const char *)root + entry[pos].OffsetToDirectory);
        if (entry[pos].Id > id) max = pos - 1;
        else min = pos + 1;
    }
    return NULL;
}
 
/**********************************************************************
 *  find_entry_default
 *
 * Find a default entry in a resource directory
 * Copied from loader/pe_resource.c (FIXME: should use exported resource functions)
 */
static const IMAGE_RESOURCE_DIRECTORY *find_entry_default( const IMAGE_RESOURCE_DIRECTORY *dir,
                                                           const void *root )
{
    const IMAGE_RESOURCE_DIRECTORY_ENTRY *entry;
    entry = (const IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
    return (const IMAGE_RESOURCE_DIRECTORY *)((const char *)root + entry->OffsetToDirectory);
}
 
/*************************************************************************
 *              USER32_GetResourceTable
 */
static DWORD USER32_GetResourceTable(LPBYTE peimage,DWORD pesize,LPBYTE *retptr)
{
    IMAGE_DOS_HEADER    * mz_header;
 
    TRACE("%p %p\n", peimage, retptr);
 
    *retptr = NULL;
 
    mz_header = (IMAGE_DOS_HEADER*) peimage;
 
    if (mz_header->e_magic != IMAGE_DOS_SIGNATURE)
    {
      if (mz_header->e_cblp == 1 || mz_header->e_cblp == 2) /* .ICO or .CUR file ? */
      {
        *retptr = (LPBYTE)-1;   /* ICONHEADER.idType, must be 1 */
        return mz_header->e_cblp;
      }
      else
        return 0; /* failed */
    }
    if (mz_header->e_lfanew >= pesize) {
        return 0; /* failed, happens with PKZIP DOS Exes for instance. */
    }
    if (*((DWORD*)(peimage + mz_header->e_lfanew)) == IMAGE_NT_SIGNATURE )
      return IMAGE_NT_SIGNATURE;
 
    if (*((WORD*)(peimage + mz_header->e_lfanew)) == IMAGE_OS2_SIGNATURE )
    {
      IMAGE_OS2_HEADER  * ne_header;
 
      ne_header = (IMAGE_OS2_HEADER*)(peimage + mz_header->e_lfanew);
 
      if (ne_header->ne_magic != IMAGE_OS2_SIGNATURE)
        return 0;
 
      if( (ne_header->ne_restab - ne_header->ne_rsrctab) <= sizeof(NE_TYPEINFO) )
        *retptr = (LPBYTE)-1;
      else
        *retptr = peimage + mz_header->e_lfanew + ne_header->ne_rsrctab;
 
      return IMAGE_OS2_SIGNATURE;
    }
    return 0; /* failed */
}
/*************************************************************************
 *          USER32_LoadResource
 */
static BYTE * USER32_LoadResource( LPBYTE peimage, NE_NAMEINFO* pNInfo, WORD sizeShift, ULONG *uSize)
{
    TRACE("%p %p 0x%08x\n", peimage, pNInfo, sizeShift);
 
    *uSize = (DWORD)pNInfo->length << sizeShift;
    return peimage + ((DWORD)pNInfo->offset << sizeShift);
}
 
/*************************************************************************
 *                      ICO_LoadIcon
 */
static BYTE * ICO_LoadIcon( LPBYTE peimage, LPicoICONDIRENTRY lpiIDE, ULONG *uSize)
{
    TRACE("%p %p\n", peimage, lpiIDE);
 
    *uSize = lpiIDE->dwBytesInRes;
    return peimage + lpiIDE->dwImageOffset;
}
 
/*************************************************************************
 *                      ICO_GetIconDirectory
 *
 * Reads .ico file and build phony ICONDIR struct
 */
static BYTE * ICO_GetIconDirectory( LPBYTE peimage, LPicoICONDIR* lplpiID, ULONG *uSize )
{
    CURSORICONDIR   * lpcid;    /* icon resource in resource-dir format */
    CURSORICONDIR   * lpID;     /* icon resource in resource format */
    int     i;
 
    TRACE("%p %p\n", peimage, lplpiID);
 
    lpcid = (CURSORICONDIR*)peimage;
 
    if( lpcid->idReserved || (lpcid->idType != 1) || (!lpcid->idCount) )
      return 0;
 
    /* allocate the phony ICONDIR structure */
        *uSize = FIELD_OFFSET(CURSORICONDIR, idEntries[lpcid->idCount]);
    if( (lpID = HeapAlloc(GetProcessHeap(),0, *uSize) ))
    {
      /* copy the header */
      lpID->idReserved = lpcid->idReserved;
      lpID->idType = lpcid->idType;
      lpID->idCount = lpcid->idCount;
 
      /* copy the entries */
      for( i=0; i < lpcid->idCount; i++ )
      {
            memcpy(&lpID->idEntries[i], &lpcid->idEntries[i], sizeof(CURSORICONDIRENTRY) - 2);
        lpID->idEntries[i].wResId = i;
      }
 
      *lplpiID = (LPicoICONDIR)peimage;
      return (BYTE *)lpID;
    }
    return 0;
}
 
/*************************************************************************
 *  ICO_ExtractIconExW      [internal]
 *
 * NOTES
 *  nIcons = 0: returns number of Icons in file
 *
 * returns
 *  invalid file: -1
 *  failure:0;
 *  success: number of icons in file (nIcons = 0) or nr of icons retrieved
 */
static UINT ICO_ExtractIconExW(
    LPCWSTR lpszExeFileName,
    HICON * RetPtr,
    INT nIconIndex,
    UINT nIcons,
    UINT cxDesired,
    UINT cyDesired,
    UINT *pIconId,
#ifdef __REACTOS__
    UINT flags,
    /* This function is called from two different code paths.
     * One is from Shell32 using the ExtractIconEx function.
     * The other is from User32 using PrivateExtractIcons.
     * Based on W2K3SP2 testing, the count of icons returned
     * is zero (0) for PNG ones using ExtractIconEx and
     * one (1) for PNG icons using PrivateExtractIcons. 
     * We can handle the difference using the fIconEx flag.*/
    BOOL fIconEx)
#else
    UINT flags)
#endif
{
    UINT        ret = 0;
    UINT        cx1, cx2, cy1, cy2;
    LPBYTE      pData;
    DWORD       sig;
    HANDLE      hFile;
    UINT16      iconDirCount = 0,iconCount = 0;
    LPBYTE      peimage;
    HANDLE      fmapping;
    DWORD       fsizeh,fsizel;
#ifdef __REACTOS__
    WCHAR       szExpandedExePath[MAX_PATH];
#endif
        WCHAR       szExePath[MAX_PATH];
        DWORD       dwSearchReturn;
 
#ifdef __REACTOS__
    TRACE("%s, %d, %d, %p, 0x%08x, %d\n", debugstr_w(lpszExeFileName), nIconIndex, nIcons, pIconId, flags, fIconEx);
#else
    TRACE("%s, %d, %d %p 0x%08x\n", debugstr_w(lpszExeFileName), nIconIndex, nIcons, pIconId, flags);
#endif
 
#ifdef __REACTOS__
    if (RetPtr)
        *RetPtr = NULL;
 
    if (ExpandEnvironmentStringsW(lpszExeFileName, szExpandedExePath, ARRAY_SIZE(szExpandedExePath)))
        lpszExeFileName = szExpandedExePath;
#endif
 
        dwSearchReturn = SearchPathW(NULL, lpszExeFileName, NULL, ARRAY_SIZE(szExePath), szExePath, NULL);
        if ((dwSearchReturn == 0) || (dwSearchReturn > ARRAY_SIZE(szExePath)))
        {
#ifdef __REACTOS__
            WARN("File %s not found or path too long and fIconEx is '%d'\n",
                 debugstr_w(lpszExeFileName), fIconEx);
            if (fIconEx && !RetPtr && !pIconId)
                return 0;
            else
                return -1;
#else
            WARN("File %s not found or path too long\n", debugstr_w(lpszExeFileName));
            return -1;
#endif
        }
 
    hFile = CreateFileW(szExePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
    if (hFile == INVALID_HANDLE_VALUE) return ret;
    fsizel = GetFileSize(hFile,&fsizeh);
#ifdef __REACTOS__
    if (!(fsizel | fsizeh))
    {
        /* Cannot map empty file */
        CloseHandle(hFile);
        return 0; /* No icons */
    }
#endif
 
    /* Map the file */
    fmapping = CreateFileMappingW(hFile, NULL, PAGE_READONLY | SEC_COMMIT, 0, 0, NULL);
    CloseHandle(hFile);
    if (!fmapping)
    {
          WARN("CreateFileMapping error %ld\n", GetLastError() );
      return 0xFFFFFFFF;
    }
 
    if (!(peimage = MapViewOfFile(fmapping, FILE_MAP_READ, 0, 0, 0)))
    {
          WARN("MapViewOfFile error %ld\n", GetLastError() );
      CloseHandle(fmapping);
      return 0xFFFFFFFF;
    }
    CloseHandle(fmapping);
 
#ifdef __REACTOS__
    /* Check if we have a min size of 2 headers RIFF & 'icon'
     * at 8 chars each plus an anih header of 36 byptes.
     * Also, is this resource an animjated icon/cursor (RIFF) */
    if ((fsizel >= 52) && !memcmp(peimage, "RIFF", 4))
    {
        UINT anihOffset;
        UINT anihMax;
        /* Get size of the animation data */
        ULONG uSize = MAKEWORD(peimage[4], peimage[5]);
 
        /* Check if uSize is reasonable with respect to fsizel */
        if ((uSize < strlen("anih")) || (uSize > fsizel))
            goto end;
 
        /* Look though the reported size less search string length */
        anihMax = uSize - strlen("anih"); 
        /* Search for 'anih' indicating animation header */
        for (anihOffset = 0; anihOffset < anihMax; anihOffset++)
        {
            if (memcmp(&peimage[anihOffset], "anih", 4) == 0)
                break;
        }
 
        if (anihOffset + sizeof(aniheader) > fsizel)
            goto end;
 
        /* Get count of images for return value */
        ret = MAKEWORD(peimage[anihOffset + 12], peimage[anihOffset + 13]);
 
        TRACE("RIFF File with '%u' images at Offset '%u'.\n", ret, anihOffset);
 
        cx1 = LOWORD(cxDesired);
        cy1 = LOWORD(cyDesired);
 
        if (RetPtr)
        {
            RetPtr[0] = CreateIconFromResourceEx(peimage, uSize, TRUE, 0x00030000, cx1, cy1, flags);
        }
        goto end;
    }
#endif
 
    cx1 = LOWORD(cxDesired);
    cx2 = HIWORD(cxDesired);
    cy1 = LOWORD(cyDesired);
    cy2 = HIWORD(cyDesired);
 
    if (pIconId) /* Invalidate first icon identifier */
        *pIconId = 0xFFFFFFFF;
 
    if (!pIconId) /* if no icon identifier array present use the icon handle array as intermediate storage */
      pIconId = (UINT*)RetPtr;
 
    sig = USER32_GetResourceTable(peimage, fsizel, &pData);
 
/* NE exe/dll */
    if (sig==IMAGE_OS2_SIGNATURE)
    {
      BYTE      *pCIDir = 0;
      NE_TYPEINFO   *pTInfo = (NE_TYPEINFO*)(pData + 2);
      NE_NAMEINFO   *pIconStorage = NULL;
      NE_NAMEINFO   *pIconDir = NULL;
      LPicoICONDIR  lpiID = NULL;
      ULONG     uSize = 0;
 
          TRACE("-- OS2/icon Signature (0x%08x)\n", sig);
 
      if (pData == (BYTE*)-1)
      {
        pCIDir = ICO_GetIconDirectory(peimage, &lpiID, &uSize); /* check for .ICO file */
        if (pCIDir)
        {
          iconDirCount = 1; iconCount = lpiID->idCount;
              TRACE("-- icon found %p 0x%08x 0x%08x 0x%08x\n", pCIDir, uSize, iconDirCount, iconCount);
        }
      }
      else while (pTInfo->type_id && !(pIconStorage && pIconDir))
      {
        if (pTInfo->type_id == NE_RSCTYPE_GROUP_ICON)   /* find icon directory and icon repository */
        {
          iconDirCount = pTInfo->count;
          pIconDir = ((NE_NAMEINFO*)(pTInfo + 1));
          TRACE("\tfound directory - %i icon families\n", iconDirCount);
        }
        if (pTInfo->type_id == NE_RSCTYPE_ICON)
        {
          iconCount = pTInfo->count;
          pIconStorage = ((NE_NAMEINFO*)(pTInfo + 1));
          TRACE("\ttotal icons - %i\n", iconCount);
        }
        pTInfo = (NE_TYPEINFO *)((char*)(pTInfo+1)+pTInfo->count*sizeof(NE_NAMEINFO));
      }
 
      if ((pIconStorage && pIconDir) || lpiID)    /* load resources and create icons */
      {
        if (nIcons == 0)
        {
          ret = iconDirCount;
              if (lpiID)    /* *.ico file, deallocate heap pointer*/
            HeapFree(GetProcessHeap(), 0, pCIDir);
        }
        else if (nIconIndex < iconDirCount)
        {
          UINT16   i, icon;
          if (nIcons > iconDirCount - nIconIndex)
            nIcons = iconDirCount - nIconIndex;
 
          for (i = 0; i < nIcons; i++)
          {
            /* .ICO files have only one icon directory */
            if (lpiID == NULL)  /* not *.ico */
              pCIDir = USER32_LoadResource(peimage, pIconDir + i + nIconIndex, *(WORD*)pData, &uSize);
            pIconId[i] = LookupIconIdFromDirectoryEx(pCIDir, TRUE, cx1, cy1, flags);
                if (cx2 && cy2) pIconId[++i] = LookupIconIdFromDirectoryEx(pCIDir, TRUE,  cx2, cy2, flags);
          }
              if (lpiID)    /* *.ico file, deallocate heap pointer*/
            HeapFree(GetProcessHeap(), 0, pCIDir);
 
          for (icon = 0; icon < nIcons; icon++)
          {
            pCIDir = NULL;
            if (lpiID)
              pCIDir = ICO_LoadIcon(peimage, lpiID->idEntries + (int)pIconId[icon], &uSize);
            else
              for (i = 0; i < iconCount; i++)
                if (pIconStorage[i].id == ((int)pIconId[icon] | 0x8000) )
                  pCIDir = USER32_LoadResource(peimage, pIconStorage + i, *(WORD*)pData, &uSize);
 
            if (pCIDir)
                {
              RetPtr[icon] = CreateIconFromResourceEx(pCIDir, uSize, TRUE, 0x00030000,
                                                                 cx1, cy1, flags);
                  if (cx2 && cy2)
                      RetPtr[++icon] = CreateIconFromResourceEx(pCIDir, uSize, TRUE, 0x00030000,
                                                                       cx2, cy2, flags);
                }
            else
              RetPtr[icon] = 0;
          }
          ret = icon;   /* return number of retrieved icons */
        }
      }
    }
    else
    if (sig == 1 || sig == 2) /* .ICO or .CUR file */
    {
        TRACE("-- icon Signature (0x%08x)\n", sig);
 
        if (pData == (BYTE*)-1)
        {
            INT cx[2] = {cx1, cx2}, cy[2] = {cy1, cy2};
            INT index;
 
            for(index = 0; index < (cx2 || cy2 ? 2 : 1); index++)
            {
                DWORD dataOffset;
                LPBYTE imageData;
                POINT hotSpot;
#ifndef __REACTOS__
                LPICONIMAGE entry;
#endif
 
                dataOffset = get_best_icon_file_offset(peimage, fsizel, cx[index], cy[index], sig == 1, flags, sig == 1 ? NULL : &hotSpot);
 
                if (dataOffset)
                {
                    HICON icon;
                    WORD *cursorData = NULL;
#ifdef __REACTOS__
                    BITMAPINFOHEADER bi;
                    DWORD cbColorTable = 0, cbTotal;
#endif
 
                    imageData = peimage + dataOffset;
#ifdef __REACTOS__
                    /* Calculate the size of color table */
                    ZeroMemory(&bi, sizeof(bi));
                    CopyMemory(&bi, imageData, sizeof(BITMAPCOREHEADER));
                    if (bi.biBitCount <= 8)
                    {
                        if (bi.biSize >= sizeof(BITMAPINFOHEADER))
                        {
                            CopyMemory(&bi, imageData, sizeof(BITMAPINFOHEADER));
                            if (bi.biClrUsed)
                                cbColorTable = bi.biClrUsed * sizeof(RGBQUAD);
                            else
                                cbColorTable = (1 << bi.biBitCount) * sizeof(RGBQUAD);
                        }
                        else if (bi.biSize == sizeof(BITMAPCOREHEADER))
                        {
                            cbColorTable = (1 << bi.biBitCount) * sizeof(RGBTRIPLE);
                        }
                    }
 
                    /* biSizeImage is the size of the raw bitmap data.
                     * https://en.wikipedia.org/wiki/BMP_file_format */
                    if (bi.biSizeImage == 0)
                    {
                         /* Calculate image size */
#define WIDTHBYTES(width, bits) (((width) * (bits) + 31) / 32 * 4)
                        bi.biSizeImage = WIDTHBYTES(bi.biWidth, bi.biBitCount) * (bi.biHeight / 2);
                        bi.biSizeImage += WIDTHBYTES(bi.biWidth, 1) * (bi.biHeight / 2);
#undef WIDTHBYTES
                    }
 
                    /* Calculate total size */
                    cbTotal = bi.biSize + cbColorTable + bi.biSizeImage;
#else
                    entry = (LPICONIMAGE)(imageData);
#endif
 
                    if(sig == 2)
                    {
                        /* we need to prepend the bitmap data with hot spots for CreateIconFromResourceEx */
#ifdef __REACTOS__
                        cursorData = HeapAlloc(GetProcessHeap(), 0, 2 * sizeof(WORD) + cbTotal);
#else
                        cursorData = HeapAlloc(GetProcessHeap(), 0, entry->icHeader.biSizeImage + 2 * sizeof(WORD));
#endif
 
                        if(!cursorData)
                            continue;
 
                        cursorData[0] = hotSpot.x;
                        cursorData[1] = hotSpot.y;
 
#ifdef __REACTOS__
                        CopyMemory(cursorData + 2, imageData, cbTotal);
#else
                        memcpy(cursorData + 2, imageData, entry->icHeader.biSizeImage);
#endif
 
                        imageData = (LPBYTE)cursorData;
                    }
 
#ifdef __REACTOS__
                    icon = CreateIconFromResourceEx(imageData, cbTotal, sig == 1, 0x00030000, cx[index], cy[index], flags);
                    if (fIconEx && sig == 1)
                        iconCount = 1;
#else
                    icon = CreateIconFromResourceEx(imageData, entry->icHeader.biSizeImage, sig == 1, 0x00030000, cx[index], cy[index], flags);
#endif
 
                    HeapFree(GetProcessHeap(), 0, cursorData);
 
                    if (icon)
                    {
                        if (RetPtr)
                            RetPtr[index] = icon;
                        else
                            DestroyIcon(icon);
 
                        iconCount = 1;
                        break;
                    }
                }
            }
        }
        ret = iconCount;    /* return number of retrieved icons */
    }
/* end ico file */
 
/* exe/dll */
    else if( sig == IMAGE_NT_SIGNATURE )
    {
        BYTE *idata, *igdata;
        const IMAGE_RESOURCE_DIRECTORY *rootresdir, *iconresdir, *icongroupresdir;
        const IMAGE_RESOURCE_DATA_ENTRY *idataent, *igdataent;
        const IMAGE_RESOURCE_DIRECTORY_ENTRY *xresent;
        ULONG size;
        UINT i;
 
        rootresdir = RtlImageDirectoryEntryToData((HMODULE)peimage, FALSE, IMAGE_DIRECTORY_ENTRY_RESOURCE, &size);
        if (!rootresdir)
        {
            WARN("haven't found section for resource directory.\n");
            goto end;
        }
 
#ifdef __REACTOS__
        /* Check for boundary limit (and overflow) */
        if (((ULONG_PTR)(rootresdir + 1) < (ULONG_PTR)rootresdir) ||
            ((ULONG_PTR)(rootresdir + 1) > (ULONG_PTR)peimage + fsizel))
        {
            goto end;
        }
#endif
 
      /* search for the group icon directory */
      if (!(icongroupresdir = find_entry_by_id(rootresdir, LOWORD(RT_GROUP_ICON), rootresdir)))
      {
        WARN("No Icongroupresourcedirectory!\n");
        goto end;       /* failure */
      }
      iconDirCount = icongroupresdir->NumberOfNamedEntries + icongroupresdir->NumberOfIdEntries;
 
      /* only number of icons requested */
      if( !pIconId )
      {
        ret = iconDirCount;
        goto end;       /* success */
      }
 
      if( nIconIndex < 0 )
      {
        /* search resource id */
        int n = 0;
        int iId = abs(nIconIndex);
        const IMAGE_RESOURCE_DIRECTORY_ENTRY* xprdeTmp = (const IMAGE_RESOURCE_DIRECTORY_ENTRY*)(icongroupresdir+1);
 
        while(n<iconDirCount && xprdeTmp)
        {
              if(xprdeTmp->Id ==  iId)
              {
                  nIconIndex = n;
                  break;
              }
              n++;
              xprdeTmp++;
        }
        if (nIconIndex < 0)
        {
          WARN("resource id %d not found\n", iId);
          goto end;     /* failure */
        }
      }
      else
      {
        /* check nIconIndex to be in range */
        if (nIconIndex >= iconDirCount)
        {
          WARN("nIconIndex %d is larger than iconDirCount %d\n",nIconIndex,iconDirCount);
          goto end;     /* failure */
        }
      }
 
      /* assure we don't get too much */
      if( nIcons > iconDirCount - nIconIndex )
        nIcons = iconDirCount - nIconIndex;
 
      /* starting from specified index */
      xresent = (const IMAGE_RESOURCE_DIRECTORY_ENTRY*)(icongroupresdir+1) + nIconIndex;
 
      for (i=0; i < nIcons; i++,xresent++)
      {
        const IMAGE_RESOURCE_DIRECTORY *resdir;
 
        /* go down this resource entry, name */
            resdir = (const IMAGE_RESOURCE_DIRECTORY *)((const char *)rootresdir + xresent->OffsetToDirectory);
 
        /* default language (0) */
        resdir = find_entry_default(resdir,rootresdir);
        igdataent = (const IMAGE_RESOURCE_DATA_ENTRY*)resdir;
 
        /* lookup address in mapped image for virtual address */
        igdata = RtlImageRvaToVa(RtlImageNtHeader((HMODULE)peimage), (HMODULE)peimage, igdataent->OffsetToData, NULL);
        if (!igdata)
        {
          FIXME("no matching real address for icongroup!\n");
          goto end; /* failure */
        }
        pIconId[i] = LookupIconIdFromDirectoryEx(igdata, TRUE, cx1, cy1, flags);
            if (cx2 && cy2) pIconId[++i] = LookupIconIdFromDirectoryEx(igdata, TRUE, cx2, cy2, flags);
      }
 
      if (!(iconresdir=find_entry_by_id(rootresdir,LOWORD(RT_ICON),rootresdir)))
      {
        WARN("No Iconresourcedirectory!\n");
        goto end;       /* failure */
      }
 
      for (i=0; i<nIcons; i++)
      {
        const IMAGE_RESOURCE_DIRECTORY *xresdir;
        xresdir = find_entry_by_id(iconresdir, LOWORD(pIconId[i]), rootresdir);
            if( !xresdir )
            {
#ifdef __REACTOS__
              /* XP/2K3 can decode icons this way. Vista/7 cannot. This handles
               * damaged Resources in 'Icon Group' by falling back to 'Icon' resources.
               * Older Watcom C/C++ compilers can generate such a case */
              const IMAGE_RESOURCE_DIRECTORY *resdir;
              WARN("icon entry %d not found\n", LOWORD(pIconId[i]));
 
              /* Try to get an icon by walking the files Resource Section */
              if (iconresdir->NumberOfIdEntries > 0)
              {
                  xresent = (const IMAGE_RESOURCE_DIRECTORY_ENTRY*)
                      (ULONG_PTR)(iconresdir + 1);
              }
              else
              {
                  RetPtr[i] = 0;
                  continue;
              }
 
              /* Get the Resource Directory */
              resdir = (const IMAGE_RESOURCE_DIRECTORY *)
                       ((const char *)rootresdir + xresent->OffsetToDirectory);
 
              if (resdir->NumberOfIdEntries > 0) // Do we have entries
              {
                  xresent = (const IMAGE_RESOURCE_DIRECTORY_ENTRY*)
                      (ULONG_PTR)(resdir + 1);
              }
              else
              {
                  RetPtr[i] = 0;
                  continue;
              }
 
              /* Retrieve the data entry and find its address */
              igdataent = (const IMAGE_RESOURCE_DATA_ENTRY*)
                  ((const char *)rootresdir + xresent->OffsetToData);
              idata = RtlImageRvaToVa(RtlImageNtHeader((HMODULE)peimage),
                  (HMODULE)peimage, igdataent->OffsetToData, NULL);
              if (!idata)
              {
                  RetPtr[i] = 0;
                  continue;
              }
 
              /* Check to see if this looks like an icon bitmap */
              if (idata[0] == sizeof(BITMAPINFOHEADER))
              {
                  BITMAPINFOHEADER bmih;
                  RtlCopyMemory(&bmih, idata, sizeof(BITMAPINFOHEADER));
                  /* Do the Width and Height look correct for an icon */
                  if ((bmih.biWidth * 2) == bmih.biHeight)
                  {
                      RetPtr[0] = CreateIconFromResourceEx(idata, igdataent->Size,
                          TRUE, 0x00030000, cx1, cy1, flags);
                      if (cx2 && cy2)
                          RetPtr[1] = CreateIconFromResourceEx(idata, idataent->Size,
                              TRUE, 0x00030000, cx2, cy2, flags);
                      ret = 1;  // Set number of icons found
                      goto end; // Success so Exit
                  }
              }
              else
              {
                  RetPtr[i] = 0;
                  continue;
              }
#else
              WARN("icon entry %d not found\n", LOWORD(pIconId[i]));
          RetPtr[i]=0;
          continue;
#endif
            }
        xresdir = find_entry_default(xresdir, rootresdir);
        idataent = (const IMAGE_RESOURCE_DATA_ENTRY*)xresdir;
 
        idata = RtlImageRvaToVa(RtlImageNtHeader((HMODULE)peimage), (HMODULE)peimage, idataent->OffsetToData, NULL);
        if (!idata)
        {
          WARN("no matching real address found for icondata!\n");
          RetPtr[i]=0;
          continue;
        }
        RetPtr[i] = CreateIconFromResourceEx(idata, idataent->Size, TRUE, 0x00030000, cx1, cy1, flags);
            if (cx2 && cy2)
                RetPtr[++i] = CreateIconFromResourceEx(idata, idataent->Size, TRUE, 0x00030000, cx2, cy2, flags);
      }
      ret = i;  /* return number of retrieved icons */
    }           /* if(sig == IMAGE_NT_SIGNATURE) */
 
end:
    UnmapViewOfFile(peimage);   /* success */
    return ret;
}
 
/***********************************************************************
 *           PrivateExtractIconsW           [USER32.@]
 *
 * NOTES
 *  If HIWORD(sizeX) && HIWORD(sizeY) 2 * ((nIcons + 1) MOD 2) icons are
 *  returned, with the LOWORD size icon first and the HIWORD size icon
 *  second.
 *  Also the Windows equivalent does extract icons in a strange way if
 *  nIndex is negative. Our implementation treats a negative nIndex as
 *  looking for that resource identifier for the first icon to retrieve.
 *
 * FIXME:
 *  should also support 16 bit EXE + DLLs, cursor and animated cursor as
 *  well as bitmap files.
 */
 
UINT WINAPI PrivateExtractIconsW (
    LPCWSTR lpwstrFile,
    int nIndex,
    int sizeX,
    int sizeY,
    HICON * phicon, /* [out] pointer to array of nIcons HICON handles */
    UINT* pIconId,  /* [out] pointer to array of nIcons icon identifiers or NULL */
    UINT nIcons,    /* [in] number of icons to retrieve */
    UINT flags )    /* [in] LR_* flags used by LoadImage */
{
    TRACE("%s %d %dx%d %p %p %d 0x%08x\n",
          debugstr_w(lpwstrFile), nIndex, sizeX, sizeY, phicon, pIconId, nIcons, flags);
 
    if ((nIcons & 1) && HIWORD(sizeX) && HIWORD(sizeY))
    {
      WARN("Uneven number %d of icons requested for small and large icons!\n", nIcons);
    }
#ifdef __REACTOS__
    return ICO_ExtractIconExW(lpwstrFile, phicon, nIndex, nIcons, sizeX, sizeY,
                              pIconId, flags, TRUE);
#else
    return ICO_ExtractIconExW(lpwstrFile, phicon, nIndex, nIcons, sizeX, sizeY, pIconId, flags);
#endif
}
 
/***********************************************************************
 *           PrivateExtractIconsA           [USER32.@]
 */
 
UINT WINAPI PrivateExtractIconsA (
    LPCSTR lpstrFile,
    int nIndex,
    int sizeX,
    int sizeY,
    HICON * phicon, /* [out] pointer to array of nIcons HICON handles */
    UINT* piconid,  /* [out] pointer to array of nIcons icon identifiers or NULL */
    UINT nIcons,    /* [in] number of icons to retrieve */
    UINT flags )    /* [in] LR_* flags used by LoadImage */
{
    UINT ret;
    INT len = MultiByteToWideChar(CP_ACP, 0, lpstrFile, -1, NULL, 0);
    LPWSTR lpwstrFile = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
#ifdef __REACTOS__
    if (lpwstrFile == NULL)
        return 0;
#endif
 
    MultiByteToWideChar(CP_ACP, 0, lpstrFile, -1, lpwstrFile, len);
    ret = PrivateExtractIconsW(lpwstrFile, nIndex, sizeX, sizeY, phicon, piconid, nIcons, flags);
 
    HeapFree(GetProcessHeap(), 0, lpwstrFile);
    return ret;
}
 
/***********************************************************************
 *           PrivateExtractIconExW          [USER32.@]
 * NOTES
 *  if nIndex == -1 it returns the number of icons in any case !!!
 */
UINT WINAPI PrivateExtractIconExW (
    LPCWSTR lpwstrFile,
    int nIndex,
    HICON * phIconLarge,
    HICON * phIconSmall,
    UINT nIcons )
{
    DWORD cyicon, cysmicon, cxicon, cxsmicon;
    UINT ret = 0;
 
    TRACE("%s %d %p %p %d\n",
    debugstr_w(lpwstrFile),nIndex,phIconLarge, phIconSmall, nIcons);
 
#ifdef __REACTOS__
    if (nIndex == -1 || (!phIconSmall && !phIconLarge))
      /* get the number of icons */
      return ICO_ExtractIconExW(lpwstrFile, NULL, 0, 0, 0, 0, NULL,
                                LR_DEFAULTCOLOR, FALSE);
#else
    if (nIndex == -1)
      /* get the number of icons */
      return ICO_ExtractIconExW(lpwstrFile, NULL, 0, 0, 0, 0, NULL, LR_DEFAULTCOLOR);
#endif
 
    if (nIcons == 1 && phIconSmall && phIconLarge)
    {
      HICON hIcon[2];
      cxicon = GetSystemMetrics(SM_CXICON);
      cyicon = GetSystemMetrics(SM_CYICON);
      cxsmicon = GetSystemMetrics(SM_CXSMICON);
      cysmicon = GetSystemMetrics(SM_CYSMICON);
 
#ifdef __REACTOS__
      ret = ICO_ExtractIconExW(lpwstrFile, hIcon, nIndex, 2,
                               cxicon | (cxsmicon<<16),
                               cyicon | (cysmicon<<16), NULL,
                               LR_DEFAULTCOLOR, FALSE);
#else
          ret = ICO_ExtractIconExW(lpwstrFile, hIcon, nIndex, 2, cxicon | (cxsmicon<<16),
                               cyicon | (cysmicon<<16), NULL, LR_DEFAULTCOLOR);
#endif
      *phIconLarge = hIcon[0];
      *phIconSmall = hIcon[1];
      return ret;
    }
 
    if (phIconSmall)
    {
      /* extract n small icons */
      cxsmicon = GetSystemMetrics(SM_CXSMICON);
      cysmicon = GetSystemMetrics(SM_CYSMICON);
#ifdef __REACTOS__
      ret = ICO_ExtractIconExW(lpwstrFile, phIconSmall, nIndex, nIcons, cxsmicon,
                               cysmicon, NULL, LR_DEFAULTCOLOR, FALSE);
#else
      ret = ICO_ExtractIconExW(lpwstrFile, phIconSmall, nIndex, nIcons, cxsmicon,
                               cysmicon, NULL, LR_DEFAULTCOLOR);
#endif
    }
       if (phIconLarge)
    {
      /* extract n large icons */
      cxicon = GetSystemMetrics(SM_CXICON);
      cyicon = GetSystemMetrics(SM_CYICON);
#ifdef __REACTOS__
       ret = ICO_ExtractIconExW(lpwstrFile, phIconLarge, nIndex, nIcons, cxicon,
                                cyicon, NULL, LR_DEFAULTCOLOR, FALSE);
#else
         ret = ICO_ExtractIconExW(lpwstrFile, phIconLarge, nIndex, nIcons, cxicon,
                               cyicon, NULL, LR_DEFAULTCOLOR);
#endif
    }
    return ret;
}
 
/***********************************************************************
 *           PrivateExtractIconExA          [USER32.@]
 */
UINT WINAPI PrivateExtractIconExA (
    LPCSTR lpstrFile,
    int nIndex,
    HICON * phIconLarge,
    HICON * phIconSmall,
    UINT nIcons )
{
    UINT ret;
    INT len = MultiByteToWideChar(CP_ACP, 0, lpstrFile, -1, NULL, 0);
    LPWSTR lpwstrFile = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
#ifdef __REACTOS__
    if (lpwstrFile == NULL)
        return 0;
#endif
 
    TRACE("%s %d %p %p %d\n", lpstrFile, nIndex, phIconLarge, phIconSmall, nIcons);
 
    MultiByteToWideChar(CP_ACP, 0, lpstrFile, -1, lpwstrFile, len);
    ret = PrivateExtractIconExW(lpwstrFile, nIndex, phIconLarge, phIconSmall, nIcons);
    HeapFree(GetProcessHeap(), 0, lpwstrFile);
    return ret;
}