Function FS_AddGameDirectory

code/qcommon/files.cpp:2708–2796

*/
#define	MAX_PAKFILES	1024
static void FS_AddGameDirectory( const char *path, const char *dir ) {
	searchpath_t	*sp;
	int				i;
	searchpath_t	*search;
	searchpath_t	*thedir;
	pack_t			*pak;
	char			curpath[MAX_OSPATH + 1], *pakfile;
	int				numfiles;
	char			**pakfiles;
	char			*sorted[MAX_PAKFILES];

	// this fixes the case where fs_basepath is the same as fs_cdpath
	// which happens on full installs
	for ( sp = fs_searchpaths ; sp ; sp = sp->next ) {
		// TODO Sys_PathCmp SDL-Port will contain this for SP as well
		// Should be Sys_PathCmp(sp->dir->path, path)
		if ( sp->dir && !Q_stricmp(sp->dir->path, path) && !Q_stricmp(sp->dir->gamedir, dir)) {
			return;			// we've already got this one
		}
	}

	Q_strncpyz( fs_gamedir, dir, sizeof( fs_gamedir ) );

	// find all pak files in this directory
	Q_strncpyz(curpath, FS_BuildOSPath(path, dir, ""), sizeof(curpath));
	curpath[strlen(curpath) - 1] = '\0';	// strip the trailing slash

	//
	// add the directory to the search path
	//
	search = (struct searchpath_s *)Z_Malloc (sizeof(searchpath_t), TAG_FILESYS, qtrue);
	search->dir = (directory_t *)Z_Malloc( sizeof( *search->dir ), TAG_FILESYS, qtrue );

	Q_strncpyz( search->dir->path, path, sizeof( search->dir->path ) );
	Q_strncpyz( search->dir->fullpath, curpath, sizeof( search->dir->fullpath ) );
	Q_strncpyz( search->dir->gamedir, dir, sizeof( search->dir->gamedir ) );
	search->next = fs_searchpaths;
	fs_searchpaths = search;

	thedir = search;

	pakfiles = Sys_ListFiles( curpath, ".pk3", NULL, &numfiles, qfalse );

	// sort them so that later alphabetic matches override
	// earlier ones.  This makes pak1.pk3 override pak0.pk3
	if ( numfiles > MAX_PAKFILES ) {
		numfiles = MAX_PAKFILES;
	}
	for ( i = 0 ; i < numfiles ; i++ ) {
		sorted[i] = pakfiles[i];
	}

	qsort( sorted, numfiles, sizeof(char*), paksort );

	for ( i = 0 ; i < numfiles ; i++ ) {
		pakfile = FS_BuildOSPath( path, dir, sorted[i] );
		if ( ( pak = FS_LoadZipFile( pakfile, sorted[i] ) ) == 0 )
			continue;