dlls/version/info.c

/*
 * Implementation of VERSION.DLL - Version Info access
 *
 * Copyright 1996,1997 Marcus Meissner
 * Copyright 1997 David Cuthbert
 * Copyright 1999 Ulrich Weigand
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * TODO
 *   o Verify VerQueryValue()
 */

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winver.h"
#include "winternl.h"
#include "wine/winuser16.h"
#include "wine/unicode.h"
#include "winerror.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ver);


/******************************************************************************
 *
 *   This function will print via dprintf[_]ver to stddeb debug info regarding
 *   the file info structure vffi.
 *      15-Feb-1998 Dimitrie Paun (dimi@cs.toronto.edu)
 *      Added this function to clean up the code.
 *
 *****************************************************************************/
static void print_vffi_debug(VS_FIXEDFILEINFO *vffi)
{
	TRACE(" structversion=%u.%u, fileversion=%u.%u.%u.%u, productversion=%u.%u.%u.%u, flagmask=0x%lx, flags=%s%s%s%s%s%s\n",
		    HIWORD(vffi->dwStrucVersion),LOWORD(vffi->dwStrucVersion),
		    HIWORD(vffi->dwFileVersionMS),LOWORD(vffi->dwFileVersionMS),
		    HIWORD(vffi->dwFileVersionLS),LOWORD(vffi->dwFileVersionLS),
		    HIWORD(vffi->dwProductVersionMS),LOWORD(vffi->dwProductVersionMS),
		    HIWORD(vffi->dwProductVersionLS),LOWORD(vffi->dwProductVersionLS),
		    vffi->dwFileFlagsMask,
		    (vffi->dwFileFlags & VS_FF_DEBUG) ? "DEBUG," : "",
		    (vffi->dwFileFlags & VS_FF_PRERELEASE) ? "PRERELEASE," : "",
		    (vffi->dwFileFlags & VS_FF_PATCHED) ? "PATCHED," : "",
		    (vffi->dwFileFlags & VS_FF_PRIVATEBUILD) ? "PRIVATEBUILD," : "",
		    (vffi->dwFileFlags & VS_FF_INFOINFERRED) ? "INFOINFERRED," : "",
		    (vffi->dwFileFlags & VS_FF_SPECIALBUILD) ? "SPECIALBUILD," : ""
		    );

        TRACE("(");
	TRACE(" OS=0x%x.0x%x ",
		HIWORD(vffi->dwFileOS),
		LOWORD(vffi->dwFileOS)
	);
	switch (vffi->dwFileOS&0xFFFF0000) {
	case VOS_DOS:TRACE("DOS,");break;
	case VOS_OS216:TRACE("OS/2-16,");break;
	case VOS_OS232:TRACE("OS/2-32,");break;
	case VOS_NT:TRACE("NT,");break;
	case VOS_UNKNOWN:
	default:
		TRACE("UNKNOWN(0x%lx),",vffi->dwFileOS&0xFFFF0000);break;
	}
	switch (LOWORD(vffi->dwFileOS)) {
	case VOS__BASE:TRACE("BASE");break;
	case VOS__WINDOWS16:TRACE("WIN16");break;
	case VOS__WINDOWS32:TRACE("WIN32");break;
	case VOS__PM16:TRACE("PM16");break;
	case VOS__PM32:TRACE("PM32");break;
	default:TRACE("UNKNOWN(0x%x)",LOWORD(vffi->dwFileOS));break;
	}
	TRACE(")\n");

	switch (vffi->dwFileType) {
	default:
	case VFT_UNKNOWN:
		TRACE("filetype=Unknown(0x%lx)",vffi->dwFileType);
		break;
	case VFT_APP:TRACE("filetype=APP,");break;
	case VFT_DLL:TRACE("filetype=DLL,");break;
	case VFT_DRV:
		TRACE("filetype=DRV,");
		switch(vffi->dwFileSubtype) {
		default:
		case VFT2_UNKNOWN:
			TRACE("UNKNOWN(0x%lx)",vffi->dwFileSubtype);
			break;
		case VFT2_DRV_PRINTER:
			TRACE("PRINTER");
			break;
		case VFT2_DRV_KEYBOARD:
			TRACE("KEYBOARD");
			break;
		case VFT2_DRV_LANGUAGE:
			TRACE("LANGUAGE");
			break;
		case VFT2_DRV_DISPLAY:
			TRACE("DISPLAY");
			break;
		case VFT2_DRV_MOUSE:
			TRACE("MOUSE");
			break;
		case VFT2_DRV_NETWORK:
			TRACE("NETWORK");
			break;
		case VFT2_DRV_SYSTEM:
			TRACE("SYSTEM");
			break;
		case VFT2_DRV_INSTALLABLE:
			TRACE("INSTALLABLE");
			break;
		case VFT2_DRV_SOUND:
			TRACE("SOUND");
			break;
		case VFT2_DRV_COMM:
			TRACE("COMM");
			break;
		case VFT2_DRV_INPUTMETHOD:
			TRACE("INPUTMETHOD");
			break;
		}
		break;
	case VFT_FONT:
                TRACE("filetype=FONT.");
		switch (vffi->dwFileSubtype) {
		default:
			TRACE("UNKNOWN(0x%lx)",vffi->dwFileSubtype);
			break;
		case VFT2_FONT_RASTER:TRACE("RASTER");break;
		case VFT2_FONT_VECTOR:TRACE("VECTOR");break;
		case VFT2_FONT_TRUETYPE:TRACE("TRUETYPE");break;
		}
		break;
	case VFT_VXD:TRACE("filetype=VXD");break;
	case VFT_STATIC_LIB:TRACE("filetype=STATIC_LIB");break;
	}
        TRACE("\n");
	TRACE("  filedata=0x%lx.0x%lx\n",
		    vffi->dwFileDateMS,vffi->dwFileDateLS);
}


/***********************************************************************
 * Version Info Structure
 */

typedef struct
{
    WORD  wLength;
    WORD  wValueLength;
    CHAR  szKey[1];
#if 0   /* variable length structure */
    /* DWORD aligned */
    BYTE  Value[];
    /* DWORD aligned */
    VS_VERSION_INFO_STRUCT16 Children[];
#endif
} VS_VERSION_INFO_STRUCT16;

typedef struct
{
    WORD  wLength;
    WORD  wValueLength;
    WORD  bText;
    WCHAR szKey[1];
#if 0   /* variable length structure */
    /* DWORD aligned */
    BYTE  Value[];
    /* DWORD aligned */
    VS_VERSION_INFO_STRUCT32 Children[];
#endif
} VS_VERSION_INFO_STRUCT32;

#define VersionInfoIs16( ver ) \
    ( ((VS_VERSION_INFO_STRUCT16 *)ver)->szKey[0] >= ' ' )

#define DWORD_ALIGN( base, ptr ) \
    ( (LPBYTE)(base) + ((((LPBYTE)(ptr) - (LPBYTE)(base)) + 3) & ~3) )

#define VersionInfo16_Value( ver )  \
    DWORD_ALIGN( (ver), (ver)->szKey + strlen((ver)->szKey) + 1 )
#define VersionInfo32_Value( ver )  \
    DWORD_ALIGN( (ver), (ver)->szKey + strlenW((ver)->szKey) + 1 )

#define VersionInfo16_Children( ver )  \
    (VS_VERSION_INFO_STRUCT16 *)( VersionInfo16_Value( ver ) + \
                           ( ( (ver)->wValueLength + 3 ) & ~3 ) )
#define VersionInfo32_Children( ver )  \
    (VS_VERSION_INFO_STRUCT32 *)( VersionInfo32_Value( ver ) + \
                           ( ( (ver)->wValueLength * \
                               ((ver)->bText? 2 : 1) + 3 ) & ~3 ) )

#define VersionInfo16_Next( ver ) \
    (VS_VERSION_INFO_STRUCT16 *)( (LPBYTE)ver + (((ver)->wLength + 3) & ~3) )
#define VersionInfo32_Next( ver ) \
    (VS_VERSION_INFO_STRUCT32 *)( (LPBYTE)ver + (((ver)->wLength + 3) & ~3) )

/***********************************************************************
 *           ConvertVersionInfo32To16        [internal]
 */
void ConvertVersionInfo32To16( VS_VERSION_INFO_STRUCT32 *info32,
                               VS_VERSION_INFO_STRUCT16 *info16 )
{
    /* Copy data onto local stack to prevent overwrites */
    WORD wLength = info32->wLength;
    WORD wValueLength = info32->wValueLength;
    WORD bText = info32->bText;
    LPBYTE lpValue = VersionInfo32_Value( info32 );
    VS_VERSION_INFO_STRUCT32 *child32 = VersionInfo32_Children( info32 );
    VS_VERSION_INFO_STRUCT16 *child16;

    TRACE("Converting %p to %p\n", info32, info16 );
    TRACE("wLength %d, wValueLength %d, bText %d, value %p, child %p\n",
                wLength, wValueLength, bText, lpValue, child32 );

    /* Convert key */
    WideCharToMultiByte( CP_ACP, 0, info32->szKey, -1, info16->szKey, 0x7fffffff, NULL, NULL );

    TRACE("Copied key from %p to %p: %s\n", info32->szKey, info16->szKey,
                debugstr_a(info16->szKey) );

    /* Convert value */
    if ( wValueLength == 0 )
    {
        info16->wValueLength = 0;
        TRACE("No value present\n" );
    }
    else if ( bText )
    {
        info16->wValueLength = WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)lpValue, -1, NULL, 0, NULL, NULL );
        WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)lpValue, -1,
                             VersionInfo16_Value( info16 ), info16->wValueLength, NULL, NULL );

        TRACE("Copied value from %p to %p: %s\n", lpValue,
                    VersionInfo16_Value( info16 ),
                    debugstr_a(VersionInfo16_Value( info16 )) );
    }
    else
    {
        info16->wValueLength = wValueLength;
        memmove( VersionInfo16_Value( info16 ), lpValue, wValueLength );

        TRACE("Copied value from %p to %p: %d bytes\n", lpValue,
                     VersionInfo16_Value( info16 ), wValueLength );
    }

    /* Convert children */
    child16 = VersionInfo16_Children( info16 );
    while ( (DWORD)child32 < (DWORD)info32 + wLength && child32->wLength != 0 )
    {
        VS_VERSION_INFO_STRUCT32 *nextChild = VersionInfo32_Next( child32 );

        ConvertVersionInfo32To16( child32, child16 );

        child16 = VersionInfo16_Next( child16 );
        child32 = nextChild;
    }

    /* Fixup length */
    info16->wLength = (DWORD)child16 - (DWORD)info16;

    TRACE("Finished, length is %d (%p - %p)\n",
                info16->wLength, info16, child16 );
}

/***********************************************************************
 *           VERSION_GetFileVersionInfo_PE             [internal]
 *
 *    NOTE: returns size of the PE VERSION resource or 0xFFFFFFFF
 *    in the case the file is a PE module, but VERSION_INFO not found.
 */
static DWORD VERSION_GetFileVersionInfo_PE( LPCWSTR filename, DWORD datasize, LPVOID data )
{
    VS_FIXEDFILEINFO *vffi;
    DWORD len;
    BYTE *buf;
    HMODULE hModule;
    HRSRC hRsrc;
    HGLOBAL hMem;

    TRACE("%s\n", debugstr_w(filename));

    hModule = GetModuleHandleW(filename);
    if(!hModule)
	hModule = LoadLibraryExW(filename, 0, LOAD_LIBRARY_AS_DATAFILE);
    else
	hModule = LoadLibraryExW(filename, 0, 0);
    if(!hModule)
    {
	WARN("Could not load %s\n", debugstr_w(filename));
	return 0;
    }
    hRsrc = FindResourceW(hModule,
			  MAKEINTRESOURCEW(VS_VERSION_INFO),
			  MAKEINTRESOURCEW(VS_FILE_INFO));
    if(!hRsrc)
    {
	WARN("Could not find VS_VERSION_INFO in %s\n", debugstr_w(filename));
	FreeLibrary(hModule);
	return 0xFFFFFFFF;
    }
    len = SizeofResource(hModule, hRsrc);
    hMem = LoadResource(hModule, hRsrc);
    if(!hMem)
    {
	WARN("Could not load VS_VERSION_INFO from %s\n", debugstr_w(filename));
	FreeLibrary(hModule);
	return 0xFFFFFFFF;
    }
    buf = LockResource(hMem);

    vffi = (VS_FIXEDFILEINFO *)VersionInfo32_Value( (VS_VERSION_INFO_STRUCT32 *)buf );

    if ( vffi->dwSignature != VS_FFI_SIGNATURE )
    {
        WARN("vffi->dwSignature is 0x%08lx, but not 0x%08lx!\n",
                   vffi->dwSignature, VS_FFI_SIGNATURE );
	len = 0xFFFFFFFF;
	goto END;
    }

    if ( TRACE_ON(ver) )
        print_vffi_debug( vffi );

    if(data)
    {
	if(datasize < len)
	    len = datasize; /* truncate data */
	if(len)
	    memcpy(data, buf, len);
	else
	    len = 0xFFFFFFFF;
    }
END:
    FreeResource(hMem);
    FreeLibrary(hModule);

    return len;
}

/***********************************************************************
 *           VERSION_GetFileVersionInfo_16             [internal]
 *
 *    NOTE: returns size of the 16-bit VERSION resource or 0xFFFFFFFF
 *    in the case the file exists, but VERSION_INFO not found.
 */
static DWORD VERSION_GetFileVersionInfo_16( LPCSTR filename, DWORD datasize, LPVOID data )
{
    VS_FIXEDFILEINFO *vffi;
    DWORD len, offset;
    BYTE *buf;
    HMODULE16 hModule;
    HRSRC16 hRsrc;
    HGLOBAL16 hMem;
    char dllname[20], owner[20], *p;
    const char *basename;
    BOOL is_builtin = FALSE;

    TRACE("%s\n", debugstr_a(filename));

    /* strip path information */

    basename = filename;
    if (basename[0] && basename[1] == ':') basename += 2;  /* strip drive specification */
    if ((p = strrchr( basename, '\\' ))) basename = p + 1;
    if ((p = strrchr( basename, '/' ))) basename = p + 1;

    if (strlen(basename) < sizeof(dllname)-4)
    {
        int file_exists;

        strcpy( dllname, basename );
        p = strrchr( dllname, '.' );
        if (!p) strcat( dllname, ".dll" );
        for (p = dllname; *p; p++) if (*p >= 'A' && *p <= 'Z') *p += 32;

        if (wine_dll_get_owner( dllname, owner, sizeof(owner), &file_exists ) == 0)
            is_builtin = TRUE;
    }

    /* first try without loading a 16-bit module */
    if (is_builtin)
        len = 0;
    else
        len = GetFileResourceSize16( filename,
                                     MAKEINTRESOURCEA(VS_FILE_INFO),
                                     MAKEINTRESOURCEA(VS_VERSION_INFO),
                                     &offset );
    if (len)
    {
        if (!data) return len;

        len = GetFileResource16( filename,
                                 MAKEINTRESOURCEA(VS_FILE_INFO),
                                 MAKEINTRESOURCEA(VS_VERSION_INFO),
                                 offset, datasize, data );
        if (len)
        {
            if ( VersionInfoIs16( data ) )
                vffi = (VS_FIXEDFILEINFO *)VersionInfo16_Value( (VS_VERSION_INFO_STRUCT16 *)data );
            else
                vffi = (VS_FIXEDFILEINFO *)VersionInfo32_Value( (VS_VERSION_INFO_STRUCT32 *)data );

            if ( vffi->dwSignature == VS_FFI_SIGNATURE )
            {
                if ( ((VS_VERSION_INFO_STRUCT16 *)data)->wLength < len )
                    len = ((VS_VERSION_INFO_STRUCT16 *)data)->wLength;

                if ( TRACE_ON(ver) )
                    print_vffi_debug( vffi );

                if ( datasize >= sizeof(VS_VERSION_INFO_STRUCT16)
                     && datasize >= ((VS_VERSION_INFO_STRUCT16 *)data)->wLength
                     && !VersionInfoIs16( data ) )
                {
                    /* convert resource from PE format to NE format */
                    ConvertVersionInfo32To16( (VS_VERSION_INFO_STRUCT32 *)data,
                                              (VS_VERSION_INFO_STRUCT16 *)data );
                }
                return len;
            }
        }
    }

    /* this might be a builtin 16-bit module */
    hModule = LoadLibrary16(filename);
    if(hModule < 32)
    {
	WARN("Could not load %s\n", debugstr_a(filename));
	return 0;
    }
    hRsrc = FindResource16(hModule,
			  MAKEINTRESOURCEA(VS_VERSION_INFO),
			  MAKEINTRESOURCEA(VS_FILE_INFO));
    if(!hRsrc)
    {
	WARN("Could not find VS_VERSION_INFO in %s\n", debugstr_a(filename));
	FreeLibrary16(hModule);
	return 0xFFFFFFFF;
    }
    len = SizeofResource16(hModule, hRsrc);
    hMem = LoadResource16(hModule, hRsrc);
    if(!hMem)
    {
	WARN("Could not load VS_VERSION_INFO from %s\n", debugstr_a(filename));
	FreeLibrary16(hModule);
	return 0xFFFFFFFF;
    }
    buf = LockResource16(hMem);

    if(!VersionInfoIs16(buf))
    {
        len = 0xFFFFFFFF;
	goto END;
    }

    vffi = (VS_FIXEDFILEINFO *)VersionInfo16_Value( (VS_VERSION_INFO_STRUCT16 *)buf );

    if ( vffi->dwSignature != VS_FFI_SIGNATURE )
    {
        WARN("vffi->dwSignature is 0x%08lx, but not 0x%08lx!\n",
                   vffi->dwSignature, VS_FFI_SIGNATURE );
	len = 0xFFFFFFFF;
	goto END;
    }

    if ( TRACE_ON(ver) )
        print_vffi_debug( vffi );

    if(data)
    {
	if(datasize < len)
	    len = datasize; /* truncate data */
	if(len)
	    memcpy(data, buf, len);
	else
	    len = 0xFFFFFFFF;
    }
END:
    FreeResource16(hMem);
    FreeLibrary16(hModule);

    return len;
}

/***********************************************************************
 *           GetFileVersionInfoSizeW         [VERSION.@]
 */
DWORD WINAPI GetFileVersionInfoSizeW( LPCWSTR filename, LPDWORD handle )
{
    DWORD len;

    TRACE("(%s,%p)\n", debugstr_w(filename), handle );

    if (handle) *handle = 0;

    if (!filename)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return 0;
    }
    if (!*filename)
    {
        SetLastError(ERROR_BAD_PATHNAME);
        return 0;
    }

    len = VERSION_GetFileVersionInfo_PE(filename, 0, NULL);
    /* 0xFFFFFFFF means: file is a PE module, but VERSION_INFO not found */
    if(len == 0xFFFFFFFF)
    {
        SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
        return 0;
    }

    if (!len)
    {
        LPSTR filenameA;

        len = WideCharToMultiByte( CP_ACP, 0, filename, -1, NULL, 0, NULL, NULL );
        filenameA = HeapAlloc( GetProcessHeap(), 0, len );
        WideCharToMultiByte( CP_ACP, 0, filename, -1, filenameA, len, NULL, NULL );

        len = VERSION_GetFileVersionInfo_16(filenameA, 0, NULL);
        HeapFree( GetProcessHeap(), 0, filenameA );
        /* 0xFFFFFFFF means: file exists, but VERSION_INFO not found */
        if (!len)
        {
            SetLastError(ERROR_FILE_NOT_FOUND);
            return 0;
        }
        if (len == 0xFFFFFFFF)
        {
            SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
            return 0;
        }
    }

    SetLastError(0);
    return len;
}

/***********************************************************************
 *           GetFileVersionInfoSizeA         [VERSION.@]
 */
DWORD WINAPI GetFileVersionInfoSizeA( LPCSTR filename, LPDWORD handle )
{   UNICODE_STRING filenameW;
    DWORD retval;
    if(filename) RtlCreateUnicodeStringFromAsciiz(&filenameW, filename);
    else filenameW.Buffer = NULL;
    retval = GetFileVersionInfoSizeW(filenameW.Buffer, handle);
    RtlFreeUnicodeString(&filenameW);
    return retval;
}

/***********************************************************************
 *           GetFileVersionInfoA             [VERSION.@]
 */
BOOL WINAPI GetFileVersionInfoA( LPCSTR filename, DWORD handle,
                                    DWORD datasize, LPVOID data )
{   UNICODE_STRING filenameW;
    DWORD len;

    TRACE("(%s,%ld,size=%ld,data=%p)\n",
                debugstr_a(filename), handle, datasize, data );

    if (!data)
    {
        SetLastError(ERROR_INVALID_DATA);
        return FALSE;
    }
    if(filename) RtlCreateUnicodeStringFromAsciiz(&filenameW, filename);
    else filenameW.Buffer = NULL;
    len = VERSION_GetFileVersionInfo_PE(filenameW.Buffer, datasize, data);
    /* 0xFFFFFFFF means: file is a PE module, but VERSION_INFO not found */
    RtlFreeUnicodeString(&filenameW);
    if (len == 0xFFFFFFFF)
    {
        SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
        return FALSE;
    }

    if (!len)
    {
        len = VERSION_GetFileVersionInfo_16(filename, datasize, data);
        /* 0xFFFFFFFF means: file exists, but VERSION_INFO not found */
        if (!len || len == 0xFFFFFFFF)
        {
            SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
            return FALSE;
        }
    }

    if (    datasize >= sizeof(VS_VERSION_INFO_STRUCT16)
         && datasize >= ((VS_VERSION_INFO_STRUCT16 *)data)->wLength
         && !VersionInfoIs16( data ) )
    {
        /* convert resource from PE format to NE format */
        ConvertVersionInfo32To16( (VS_VERSION_INFO_STRUCT32 *)data,
                                  (VS_VERSION_INFO_STRUCT16 *)data );
    }

    SetLastError(0);
    return TRUE;
}

/***********************************************************************
 *           GetFileVersionInfoW             [VERSION.@]
 */
BOOL WINAPI GetFileVersionInfoW( LPCWSTR filename, DWORD handle,
                                    DWORD datasize, LPVOID data )
{
    DWORD len;

    TRACE("(%s,%ld,size=%ld,data=%p)\n",
                debugstr_w(filename), handle, datasize, data );

    if (!data)
    {
        SetLastError(ERROR_INVALID_DATA);
        return FALSE;
    }
    len = VERSION_GetFileVersionInfo_PE(filename, datasize, data);
    /* 0xFFFFFFFF means: file is a PE module, but VERSION_INFO not found */
    if (len == 0xFFFFFFFF)
    {
        SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
        return FALSE;
    }

    if (!len)
    {
        LPSTR filenameA;

        len = WideCharToMultiByte( CP_ACP, 0, filename, -1, NULL, 0, NULL, NULL );
        filenameA = HeapAlloc( GetProcessHeap(), 0, len );
        WideCharToMultiByte( CP_ACP, 0, filename, -1, filenameA, len, NULL, NULL );

        len = VERSION_GetFileVersionInfo_16(filenameA, datasize, data);
        HeapFree( GetProcessHeap(), 0, filenameA );
        /* 0xFFFFFFFF means: file exists, but VERSION_INFO not found */
        if (!len || len == 0xFFFFFFFF)
        {
            SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
            return FALSE;
        }
    }

    if ( datasize >= sizeof(VS_VERSION_INFO_STRUCT16) &&
         datasize >= ((VS_VERSION_INFO_STRUCT16 *)data)->wLength &&
         VersionInfoIs16( data ) )
    {
        ERR("Cannot access NE resource in %s\n", debugstr_w(filename) );
        SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND);
        return  FALSE;
    }

    SetLastError(0);
    return TRUE;
}


/***********************************************************************
 *           VersionInfo16_FindChild             [internal]
 */
static VS_VERSION_INFO_STRUCT16 *VersionInfo16_FindChild( VS_VERSION_INFO_STRUCT16 *info,
                                            LPCSTR szKey, UINT cbKey )
{
    VS_VERSION_INFO_STRUCT16 *child = VersionInfo16_Children( info );

    while ( (DWORD)child < (DWORD)info + info->wLength )
    {
        if ( !strncasecmp( child->szKey, szKey, cbKey ) )
            return child;

	if (!(child->wLength)) return NULL;
        child = VersionInfo16_Next( child );
    }

    return NULL;
}

/***********************************************************************
 *           VersionInfo32_FindChild             [internal]
 */
static VS_VERSION_INFO_STRUCT32 *VersionInfo32_FindChild( VS_VERSION_INFO_STRUCT32 *info,
                                            LPCWSTR szKey, UINT cbKey )
{
    VS_VERSION_INFO_STRUCT32 *child = VersionInfo32_Children( info );

    while ( (DWORD)child < (DWORD)info + info->wLength )
    {
        if ( !strncmpiW( child->szKey, szKey, cbKey ) )
            return child;

        child = VersionInfo32_Next( child );
    }

    return NULL;
}

/***********************************************************************
 *           VersionInfo16_QueryValue              [internal]
 *
 *    Gets a value from a 16-bit NE resource
 */
DWORD WINAPI VersionInfo16_QueryValue( VS_VERSION_INFO_STRUCT16 *info, LPCSTR lpSubBlock,
                               LPVOID *lplpBuffer, UINT *puLen )
{
    while ( *lpSubBlock )
    {
        /* Find next path component */
        LPCSTR lpNextSlash;
        for ( lpNextSlash = lpSubBlock; *lpNextSlash; lpNextSlash++ )
            if ( *lpNextSlash == '\\' )
                break;

        /* Skip empty components */
        if ( lpNextSlash == lpSubBlock )
        {
            lpSubBlock++;
            continue;
        }

        /* We have a non-empty component: search info for key */
        info = VersionInfo16_FindChild( info, lpSubBlock, lpNextSlash-lpSubBlock );
        if ( !info ) return FALSE;

        /* Skip path component */
        lpSubBlock = lpNextSlash;
    }

    /* Return value */
    *lplpBuffer = VersionInfo16_Value( info );
    if (puLen)
        *puLen = info->wValueLength;

    return TRUE;
}

/***********************************************************************
 *           VerQueryValueA              [VERSION.@]
 */
DWORD WINAPI VerQueryValueA( LPVOID pBlock, LPCSTR lpSubBlock,
                               LPVOID *lplpBuffer, UINT *puLen )
{
    VS_VERSION_INFO_STRUCT16 *info = (VS_VERSION_INFO_STRUCT16 *)pBlock;

    TRACE("(%p,%s,%p,%p)\n",
                pBlock, debugstr_a(lpSubBlock), lplpBuffer, puLen );

    if ( !VersionInfoIs16( info ) )
    {
        INT len;
        LPWSTR wide_str;
        DWORD give;

        /* <lawson_whitney@juno.com> Feb 2001 */
        /* AOL 5.0 does this, expecting to get this: */
        len = MultiByteToWideChar(CP_ACP, 0, lpSubBlock, -1, NULL, 0);
        wide_str = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
        MultiByteToWideChar(CP_ACP, 0, lpSubBlock, -1, wide_str, len);

        give = VerQueryValueW(pBlock, wide_str, lplpBuffer, puLen);
        HeapFree(GetProcessHeap(), 0, wide_str);
        return give;
    }

    return VersionInfo16_QueryValue(info, lpSubBlock, lplpBuffer, puLen);
}

/***********************************************************************
 *           VerQueryValueW              [VERSION.@]
 */
DWORD WINAPI VerQueryValueW( LPVOID pBlock, LPCWSTR lpSubBlock,
                               LPVOID *lplpBuffer, UINT *puLen )
{
    VS_VERSION_INFO_STRUCT32 *info = (VS_VERSION_INFO_STRUCT32 *)pBlock;

    TRACE("(%p,%s,%p,%p)\n",
                pBlock, debugstr_w(lpSubBlock), lplpBuffer, puLen );

    if ( VersionInfoIs16( info ) )
    {
        DWORD ret;
        int len = WideCharToMultiByte(CP_ACP, 0, lpSubBlock, -1, NULL, 0, NULL, NULL);
        LPSTR lpSubBlockA = HeapAlloc(GetProcessHeap(), 0, len * sizeof(char));
        if (!lpSubBlockA)
            return FALSE;
        WideCharToMultiByte(CP_ACP, 0, lpSubBlock, -1, lpSubBlockA, len, NULL, NULL);
        ret = VersionInfo16_QueryValue(pBlock, lpSubBlockA, lplpBuffer, puLen);
        HeapFree(GetProcessHeap(), 0, lpSubBlockA);
        return ret;
    }

    while ( *lpSubBlock )
    {
        /* Find next path component */
        LPCWSTR lpNextSlash;
        for ( lpNextSlash = lpSubBlock; *lpNextSlash; lpNextSlash++ )
            if ( *lpNextSlash == '\\' )
                break;

        /* Skip empty components */
        if ( lpNextSlash == lpSubBlock )
        {
            lpSubBlock++;
            continue;
        }

        /* We have a non-empty component: search info for key */
        info = VersionInfo32_FindChild( info, lpSubBlock, lpNextSlash-lpSubBlock );
        if ( !info ) return FALSE;

        /* Skip path component */
        lpSubBlock = lpNextSlash;
    }

    /* Return value */
    *lplpBuffer = VersionInfo32_Value( info );
    if (puLen)
        *puLen = info->wValueLength;

    return TRUE;
}