Method ListOSFiles

neo/framework/FileSystem.cpp:1849–1892

=============== idFileSystemLocal::ListOSFiles call to the OS for a listing of files in an OS directory optionally, perform some caching of the entries =============== */

===============
*/
int	idFileSystemLocal::ListOSFiles( const char *directory, const char *extension, idStrList &list ) {
	int i, j, ret;

	if ( !extension ) {
		extension = "";
	}

	if ( !fs_caseSensitiveOS.GetBool() ) {
		return Sys_ListFiles( directory, extension, list );
	}

	// try in cache
	i = dir_cache_index - 1;
	while( i >= dir_cache_index - dir_cache_count ) {
		j = (i+MAX_CACHED_DIRS) % MAX_CACHED_DIRS;
		if ( dir_cache[j].Matches( directory, extension ) ) {
			if ( fs_debug.GetInteger() ) {
				//common->Printf( "idFileSystemLocal::ListOSFiles: cache hit: %s\n", directory );
			}
			list = dir_cache[j];
			return list.Num();
		}
		i--;
	}

	if ( fs_debug.GetInteger() ) {
		//common->Printf( "idFileSystemLocal::ListOSFiles: cache miss: %s\n", directory );
	}

	ret = Sys_ListFiles( directory, extension, list );

	if ( ret == -1 ) {
		return -1;
	}

	// push a new entry
	dir_cache[dir_cache_index].Init( directory, extension, list );
	dir_cache_index = (dir_cache_index + 1) % MAX_CACHED_DIRS;
	if ( dir_cache_count < MAX_CACHED_DIRS ) {
		dir_cache_count++;
	}

	return ret;
}

/*
================