Function read_index_extension

read-cache.c:1732–1768

}

static int read_index_extension(struct index_state *istate,
				const char *ext, const char *data, unsigned long sz)
{
	switch (CACHE_EXT(ext)) {
	case CACHE_EXT_TREE:
		istate->cache_tree = cache_tree_read(data, sz);
		break;
	case CACHE_EXT_RESOLVE_UNDO:
		istate->resolve_undo = resolve_undo_read(data, sz, the_hash_algo);
		break;
	case CACHE_EXT_LINK:
		if (read_link_extension(istate, data, sz))
			return -1;
		break;
	case CACHE_EXT_UNTRACKED:
		istate->untracked = read_untracked_extension(data, sz);
		break;
	case CACHE_EXT_FSMONITOR:
		read_fsmonitor_extension(istate, data, sz);
		break;
	case CACHE_EXT_ENDOFINDEXENTRIES:
	case CACHE_EXT_INDEXENTRYOFFSETTABLE:
		/* already handled in do_read_index() */
		break;
	case CACHE_EXT_SPARSE_DIRECTORIES:
		/* no content, only an indicator */
		istate->sparse_index = INDEX_COLLAPSED;
		break;
	default:
		if (*ext < 'A' || 'Z' < *ext)
			return error(_("index uses %.4s extension, which we do not understand"),
				     ext);
		fprintf_ln(stderr, _("ignoring %.4s extension"), ext);
		break;
	}
	return 0;
}

/*
 * Parses the contents of the cache entry contained within the 'ondisk' buffer