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exticon.c

/*
 *    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 "config.h"

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>     /* abs() */
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wine/winbase16.h"
#include "user_private.h"
#include "wine/debug.h"

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;

#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

/**********************************************************************
 *  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].u1.s2.Id == id)
            return (const IMAGE_RESOURCE_DIRECTORY *)((const char *)root + entry[pos].u2.s3.OffsetToDirectory);
        if (entry[pos].u1.s2.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->u2.s3.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) /* .ICO file ? */
        {
          *retptr = (LPBYTE)-1;     /* ICONHEADER.idType, must be 1 */
          return 1;
        }
        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
 */
#define HEADER_SIZE           (sizeof(CURSORICONDIR) - sizeof (CURSORICONDIRENTRY))
#define HEADER_SIZE_FILE      (sizeof(icoICONDIR) - sizeof (icoICONDIRENTRY))

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 = lpcid->idCount * sizeof(CURSORICONDIRENTRY) + HEADER_SIZE;
      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;
}

/******************************************************************************
 *  struct extract_icons_state [internal]
 *
 * Used to carry params and state through the iterations of EnumResourceNames in ICO_ExtractIconExW 
 */
struct extract_icons_state {
    INT     nBaseIndex; /* Zero based index or negated integer id of the first icon to extract. */
    UINT    nIcons;     /* Number of icons to extract. */
    UINT    cxDesired;  /* Desired horizontal size in pixels (Might be two sizes in HI/LOWORD). */
    UINT    cyDesired;  /* Desired vertical size in pixels (Might be two sizes in HI/LOWORD). */
    UINT    fuLoad;     /* Flags passed to LoadImage. */
    INT     cIter;      /* Iteration counter. */
    HICON   *pahIcon;   /* Pointer to an array where the icon handles will be stored. */
    UINT    *paIconId;  /* Pointer to an array where the icon identifiers will be stored. */ 
};

/******************************************************************************
 *  extract_icons_callback [internal] 
 *
 * Callback function of type ENUMRESNAMEPROC for EnumResourceNames. Used in
 * ICO_ExtractIconsExW.
 */
static BOOL CALLBACK extract_icons_callback(HMODULE hModule, LPCWSTR pwszType, LPWSTR pwszName,
    LONG_PTR lParam) 
{
    struct extract_icons_state *pState = (struct extract_icons_state *)lParam;
    INT idCurrent = LOWORD(pwszName);

    /* If the handle array pointer is NULL, we just count the number of icons in the module. */
    if (!pState->pahIcon) {
        pState->cIter++;
        return TRUE;
    }
   
    /* If we didn't already start extracting icons (cIter == 0), we look if the current
     * icon is the one we should start with. That's the case if nBaseIndex is negative and
     * it's absolute value matches the current icon's identifier. Or if nBaseIndex is positive
     * and we already omitted the first nBaseIndex icons. */
    if (pState->cIter == 0) {
        if (pState->nBaseIndex < 0) {
            if (!IS_INTRESOURCE(pwszName) || idCurrent != -pState->nBaseIndex) {
                return TRUE;
            }
        } else if (pState->nBaseIndex > 0) {
            pState->nBaseIndex--;
            return TRUE;
        }
    }

    if (pState->cIter < pState->nIcons) {
        /* Load the current icon with the size given in the LOWORD of cx/cyDesired */
        pState->pahIcon[pState->cIter] = 
            LoadImageW(hModule, pwszName, IMAGE_ICON, LOWORD(pState->cxDesired), 
                       LOWORD(pState->cyDesired), pState->fuLoad);
        /* FIXME: The resource's identifier (that is not idCurrent, which is the
         * identifier of the icon directory) should be stored in paIconId, but I don't
         * know how to query for it. */ 
        if (pState->paIconId) pState->paIconId[pState->cIter] = 0;
        pState->cIter++;

        /* If there is a second desired size given in the HIWORDs of cx/cyDesired, load too. 
         * There seems to be an off-by-one error here, since pState->cIter might now be equal
         * to pState->nIcons, but this is in fact how it works on windows. */
        if (HIWORD(pState->cxDesired) && HIWORD(pState->cyDesired)) {
            pState->pahIcon[pState->cIter] = 
                LoadImageW(hModule, pwszName, IMAGE_ICON, HIWORD(pState->cxDesired), 
                           HIWORD(pState->cyDesired), pState->fuLoad);
            if (pState->paIconId) pState->paIconId[pState->cIter] = 0;
            pState->cIter++;
        }
    }

    return pState->cIter < pState->nIcons;
}

/*************************************************************************
 *    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,
      UINT flags)
{
      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;
        WCHAR           szExePath[MAX_PATH];
        DWORD           dwSearchReturn;

      TRACE("%s, %d, %d %p 0x%08x\n", debugstr_w(lpszExeFileName), nIconIndex, nIcons, pIconId, flags);

        dwSearchReturn = SearchPathW(NULL, lpszExeFileName, NULL, sizeof(szExePath) / sizeof(szExePath[0]), szExePath, NULL);
        if ((dwSearchReturn == 0) || (dwSearchReturn > sizeof(szExePath) / sizeof(szExePath[0])))
        {
          /* This is very wine specific: If the user tries to extract icons from system dlls, 
           * wine's builtin *.dll.so's will not be found (Even if they would be found it wouldn't 
           * work, since they are not in PE-format). Thus, if the SearchPath call fails, we try
           * to load the file with LoadLibrary and extract the icons with LoadImage (via
           * EnumResourceNames).
           */
          struct extract_icons_state state;
          HMODULE hDllSo = LoadLibraryW(lpszExeFileName);
          
          if (!hDllSo) {
            WARN("File %s not found or path too long\n", debugstr_w(lpszExeFileName));
            return -1;
          }

          state.nBaseIndex = nIconIndex;
          state.nIcons = nIcons;
          state.cxDesired = cxDesired;
          state.cyDesired = cyDesired;
          state.fuLoad = flags;
          state.cIter = 0;
          state.pahIcon = RetPtr;
          state.paIconId = pIconId;
          
          EnumResourceNamesW(hDllSo, MAKEINTRESOURCEW(RT_GROUP_ICON), extract_icons_callback, 
                             (LONG_PTR)&state);
          FreeLibrary(hDllSo);
  
          return state.cIter;
        }

      hFile = CreateFileW(szExePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
      if (hFile == INVALID_HANDLE_VALUE) return ret;
      fsizel = GetFileSize(hFile,&fsizeh);

      /* Map the file */
      fmapping = CreateFileMappingW(hFile, NULL, PAGE_READONLY | SEC_COMMIT, 0, 0, NULL);
      CloseHandle(hFile);
      if (!fmapping)
      {
          WARN("CreateFileMapping error %d\n", GetLastError() );
        return 0xFFFFFFFF;
      }

      if (!(peimage = MapViewOfFile(fmapping, FILE_MAP_READ, 0, 0, 0)))
      {
          WARN("MapViewOfFile error %d\n", GetLastError() );
        CloseHandle(fmapping);
        return 0xFFFFFFFF;
      }
      CloseHandle(fmapping);

      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);

/* ico file or NE exe/dll*/
      if (sig==IMAGE_OS2_SIGNATURE || sig==1) /* .ICO file */
      {
        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 */
          }
        }
      }
/* end ico file */

/* exe/dll */
      else if( sig == IMAGE_NT_SIGNATURE )
      {
        LPBYTE          idata,igdata;
        PIMAGE_DOS_HEADER     dheader;
        PIMAGE_NT_HEADERS     pe_header;
        PIMAGE_SECTION_HEADER pe_sections;
        const IMAGE_RESOURCE_DIRECTORY *rootresdir,*iconresdir,*icongroupresdir;
        const IMAGE_RESOURCE_DATA_ENTRY *idataent,*igdataent;
        const IMAGE_RESOURCE_DIRECTORY_ENTRY *xresent;
        UINT      i, j;

        dheader = (PIMAGE_DOS_HEADER)peimage;
        pe_header = (PIMAGE_NT_HEADERS)(peimage+dheader->e_lfanew);       /* it is a pe header, USER32_GetResourceTable checked that */
        pe_sections = (PIMAGE_SECTION_HEADER)(((char*)pe_header) + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER)
                                              + pe_header->FileHeader.SizeOfOptionalHeader);
        rootresdir = NULL;

        /* search for the root resource directory */
        for (i=0;i<pe_header->FileHeader.NumberOfSections;i++)
        {
          if (pe_sections[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
            continue;
          if (fsizel < pe_sections[i].PointerToRawData+pe_sections[i].SizeOfRawData) {
              FIXME("File %s too short (section is at %d bytes, real size is %d)\n",
                  debugstr_w(lpszExeFileName),
                  pe_sections[i].PointerToRawData+pe_sections[i].SizeOfRawData,
                  fsizel
            );
            goto end;
          }
          /* FIXME: doesn't work when the resources are not in a separate section */
          if (pe_sections[i].VirtualAddress == pe_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress)
          {
            rootresdir = (PIMAGE_RESOURCE_DIRECTORY)(peimage+pe_sections[i].PointerToRawData);
            break;
          }
        }

        if (!rootresdir)
        {
          WARN("haven't found section for resource directory.\n");
          goto end;           /* failure */
        }

        /* 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->u1.s2.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->u2.s3.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 = NULL;

          for (j=0;j<pe_header->FileHeader.NumberOfSections;j++)
          {
            if (igdataent->OffsetToData < pe_sections[j].VirtualAddress)
              continue;
            if (igdataent->OffsetToData+igdataent->Size > pe_sections[j].VirtualAddress+pe_sections[j].SizeOfRawData)
              continue;

            if (igdataent->OffsetToData-pe_sections[j].VirtualAddress+pe_sections[j].PointerToRawData+igdataent->Size > fsizel) {
                FIXME("overflow in PE lookup (%s has len %d, have offset %d), short file?\n", debugstr_w(lpszExeFileName), fsizel,
                     igdataent->OffsetToData - pe_sections[j].VirtualAddress + pe_sections[j].PointerToRawData + igdataent->Size);
              goto end; /* failure */
            }
            igdata = peimage+(igdataent->OffsetToData-pe_sections[j].VirtualAddress+pe_sections[j].PointerToRawData);
          }

          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 )
            {
              WARN("icon entry %d not found\n", LOWORD(pIconId[i]));
            RetPtr[i]=0;
            continue;
            }
          xresdir = find_entry_default(xresdir, rootresdir);
          idataent = (const IMAGE_RESOURCE_DATA_ENTRY*)xresdir;
          idata = NULL;

          /* map virtual to address in image */
          for (j=0;j<pe_header->FileHeader.NumberOfSections;j++)
          {
            if (idataent->OffsetToData < pe_sections[j].VirtualAddress)
              continue;
            if (idataent->OffsetToData+idataent->Size > pe_sections[j].VirtualAddress+pe_sections[j].SizeOfRawData)
              continue;
            idata = peimage+(idataent->OffsetToData-pe_sections[j].VirtualAddress+pe_sections[j].PointerToRawData);
          }
          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);
      }
      return ICO_ExtractIconExW(lpwstrFile, phicon, nIndex, nIcons, sizeX, sizeY, pIconId, flags);
}

/***********************************************************************
 *           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));

    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);

      if (nIndex == -1)
        /* get the number of icons */
        return ICO_ExtractIconExW(lpwstrFile, NULL, 0, 0, 0, 0, NULL, LR_DEFAULTCOLOR);

      if (nIcons == 1 && phIconSmall && phIconLarge)
      {
        HICON hIcon[2];
        cxicon = GetSystemMetrics(SM_CXICON);
        cyicon = GetSystemMetrics(SM_CYICON);
        cxsmicon = GetSystemMetrics(SM_CXSMICON);
        cysmicon = GetSystemMetrics(SM_CYSMICON);

          ret = ICO_ExtractIconExW(lpwstrFile, hIcon, nIndex, 2, cxicon | (cxsmicon<<16),
                                 cyicon | (cysmicon<<16), NULL, LR_DEFAULTCOLOR);
        *phIconLarge = hIcon[0];
        *phIconSmall = hIcon[1];
        return ret;
      }

      if (phIconSmall)
      {
        /* extract n small icons */
        cxsmicon = GetSystemMetrics(SM_CXSMICON);
        cysmicon = GetSystemMetrics(SM_CYSMICON);
        ret = ICO_ExtractIconExW(lpwstrFile, phIconSmall, nIndex, nIcons, cxsmicon,
                                 cysmicon, NULL, LR_DEFAULTCOLOR);
      }
       if (phIconLarge)
      {
        /* extract n large icons */
        cxicon = GetSystemMetrics(SM_CXICON);
        cyicon = GetSystemMetrics(SM_CYICON);
         ret = ICO_ExtractIconExW(lpwstrFile, phIconLarge, nIndex, nIcons, cxicon,
                                 cyicon, NULL, LR_DEFAULTCOLOR);
      }
      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));

      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;
}

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