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setupapi: Don't copy an OEM inf file if the exact same OEM inf file already exists.

This commit is contained in:
Rob Shearman 2007-05-08 16:35:14 +01:00 committed by Alexandre Julliard
parent 4cd064aeb4
commit 672a611379
1 changed files with 56 additions and 1 deletions
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57
dlls/setupapi/misc.c
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@ -919,6 +919,29 @@ done:
return ret;
}
static int compare_files( HANDLE file1, HANDLE file2 )
{
char buffer1[2048];
char buffer2[2048];
DWORD size1;
DWORD size2;
while( ReadFile(file1, buffer1, sizeof(buffer1), &size1, NULL) &&
ReadFile(file2, buffer2, sizeof(buffer2), &size2, NULL) )
{
int ret;
if (size1 != size2)
return size1 > size2 ? 1 : -1;
if (!size1)
return 0;
ret = memcmp( buffer1, buffer2, size1 );
if (ret)
return ret;
}
return 0;
}
/***********************************************************************
* SetupCopyOEMInfW (SETUPAPI.@)
*/
@ -959,6 +982,20 @@ BOOL WINAPI SetupCopyOEMInfW( PCWSTR source, PCWSTR location,
{
static const WCHAR oem[] = { 'o','e','m',0 };
unsigned int i;
LARGE_INTEGER source_file_size;
HANDLE source_file;
source_file = CreateFileW( source, FILE_READ_DATA | FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, 0, NULL );
if (source_file == INVALID_HANDLE_VALUE)
return FALSE;
if (!GetFileSizeEx( source_file, &source_file_size ))
{
CloseHandle( source_file );
return FALSE;
}
p = strrchrW( target, '\\' ) + 1;
memcpy( p, oem, sizeof(oem) );
@ -968,12 +1005,30 @@ BOOL WINAPI SetupCopyOEMInfW( PCWSTR source, PCWSTR location,
for (i = 0; i < OEM_INDEX_LIMIT; i++)
{
static const WCHAR format[] = { '%','u','.','i','n','f',0 };
HANDLE dest_file;
LARGE_INTEGER dest_file_size;
wsprintfW( p, format, i );
dest_file = CreateFileW( target, FILE_READ_DATA | FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, 0, NULL );
/* if we found a file name that doesn't exist then we're done */
if (GetFileAttributesW( target ) == INVALID_FILE_ATTRIBUTES)
if (dest_file == INVALID_HANDLE_VALUE)
break;
/* now check if the same inf file has already been copied to the inf
* directory. if so, use that file and don't create a new one */
if (!GetFileSizeEx( dest_file, &dest_file_size ) ||
(dest_file_size.QuadPart != source_file_size.QuadPart) ||
compare_files( source_file, dest_file ))
{
CloseHandle( dest_file );
continue;
}
CloseHandle( dest_file );
break;
}
CloseHandle( source_file );
if (i == OEM_INDEX_LIMIT)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );