int git_attr_assignment__parse()

in src/attr_file.c [816:923]

• 75 lines of code
• 29 McCabe index (conditional complexity)

int git_attr_assignment__parse(
	git_repository *repo,
	git_pool *pool,
	git_vector *assigns,
	const char **base)
{
	int error;
	const char *scan = *base;
	git_attr_assignment *assign = NULL;

	assert(assigns && !assigns->length);

	git_vector_set_cmp(assigns, sort_by_hash_and_name);

	while (*scan && *scan != '\n') {
		const char *name_start, *value_start;

		/* skip leading blanks */
		while (git__isspace(*scan) && *scan != '\n') scan++;

		/* allocate assign if needed */
		if (!assign) {
			assign = git__calloc(1, sizeof(git_attr_assignment));
			GIT_ERROR_CHECK_ALLOC(assign);
			GIT_REFCOUNT_INC(assign);
		}

		assign->name_hash = 5381;
		assign->value = git_attr__true;

		/* look for magic name prefixes */
		if (*scan == '-') {
			assign->value = git_attr__false;
			scan++;
		} else if (*scan == '!') {
			assign->value = git_attr__unset; /* explicit unspecified state */
			scan++;
		} else if (*scan == '#') /* comment rest of line */
			break;

		/* find the name */
		name_start = scan;
		while (*scan && !git__isspace(*scan) && *scan != '=') {
			assign->name_hash =
				((assign->name_hash << 5) + assign->name_hash) + *scan;
			scan++;
		}
		if (scan == name_start) {
			/* must have found lone prefix (" - ") or leading = ("=foo")
			 * or end of buffer -- advance until whitespace and continue
			 */
			while (*scan && !git__isspace(*scan)) scan++;
			continue;
		}

		/* allocate permanent storage for name */
		assign->name = git_pool_strndup(pool, name_start, scan - name_start);
		GIT_ERROR_CHECK_ALLOC(assign->name);

		/* if there is an equals sign, find the value */
		if (*scan == '=') {
			for (value_start = ++scan; *scan && !git__isspace(*scan); ++scan);

			/* if we found a value, allocate permanent storage for it */
			if (scan > value_start) {
				assign->value = git_pool_strndup(pool, value_start, scan - value_start);
				GIT_ERROR_CHECK_ALLOC(assign->value);
			}
		}

		/* expand macros (if given a repo with a macro cache) */
		if (repo != NULL && assign->value == git_attr__true) {
			git_attr_rule *macro =
				git_attr_cache__lookup_macro(repo, assign->name);

			if (macro != NULL) {
				unsigned int i;
				git_attr_assignment *massign;

				git_vector_foreach(&macro->assigns, i, massign) {
					GIT_REFCOUNT_INC(massign);

					error = git_vector_insert_sorted(
						assigns, massign, &merge_assignments);
					if (error < 0 && error != GIT_EEXISTS) {
						git_attr_assignment__free(assign);
						return error;
					}
				}
			}
		}

		/* insert allocated assign into vector */
		error = git_vector_insert_sorted(assigns, assign, &merge_assignments);
		if (error < 0 && error != GIT_EEXISTS)
			return error;

		/* clear assign since it is now "owned" by the vector */
		assign = NULL;
	}

	if (assign != NULL)
		git_attr_assignment__free(assign);

	*base = git__next_line(scan);

	return (assigns->length == 0) ? GIT_ENOTFOUND : 0;
}