int git_reference__normalize_name()

in src/refs.c [979:1104]

• 89 lines of code
• 35 McCabe index (conditional complexity)

int git_reference__normalize_name(
	git_buf *buf,
	const char *name,
	unsigned int flags)
{
	const char *current;
	int segment_len, segments_count = 0, error = GIT_EINVALIDSPEC;
	unsigned int process_flags;
	bool normalize = (buf != NULL);
	bool validate = (flags & GIT_REFERENCE_FORMAT__VALIDATION_DISABLE) == 0;

#ifdef GIT_USE_ICONV
	git_path_iconv_t ic = GIT_PATH_ICONV_INIT;
#endif

	assert(name);

	process_flags = flags;
	current = (char *)name;

	if (validate && *current == '/')
		goto cleanup;

	if (normalize)
		git_buf_clear(buf);

#ifdef GIT_USE_ICONV
	if ((flags & GIT_REFERENCE_FORMAT__PRECOMPOSE_UNICODE) != 0) {
		size_t namelen = strlen(current);
		if ((error = git_path_iconv_init_precompose(&ic)) < 0 ||
			(error = git_path_iconv(&ic, &current, &namelen)) < 0)
			goto cleanup;
		error = GIT_EINVALIDSPEC;
	}
#endif

	if (!validate) {
		git_buf_sets(buf, current);

		error = git_buf_oom(buf) ? -1 : 0;
		goto cleanup;
	}

	while (true) {
		char may_contain_glob = process_flags & GIT_REFERENCE_FORMAT_REFSPEC_PATTERN;

		segment_len = ensure_segment_validity(current, may_contain_glob);
		if (segment_len < 0)
			goto cleanup;

		if (segment_len > 0) {
			/*
			 * There may only be one glob in a pattern, thus we reset
			 * the pattern-flag in case the current segment has one.
			 */
			if (memchr(current, '*', segment_len))
				process_flags &= ~GIT_REFERENCE_FORMAT_REFSPEC_PATTERN;

			if (normalize) {
				size_t cur_len = git_buf_len(buf);

				git_buf_joinpath(buf, git_buf_cstr(buf), current);
				git_buf_truncate(buf,
					cur_len + segment_len + (segments_count ? 1 : 0));

				if (git_buf_oom(buf)) {
					error = -1;
					goto cleanup;
				}
			}

			segments_count++;
		}

		/* No empty segment is allowed when not normalizing */
		if (segment_len == 0 && !normalize)
			goto cleanup;

		if (current[segment_len] == '\0')
			break;

		current += segment_len + 1;
	}

	/* A refname can not be empty */
	if (segment_len == 0 && segments_count == 0)
		goto cleanup;

	/* A refname can not end with "." */
	if (current[segment_len - 1] == '.')
		goto cleanup;

	/* A refname can not end with "/" */
	if (current[segment_len - 1] == '/')
		goto cleanup;

	if ((segments_count == 1 ) && !(flags & GIT_REFERENCE_FORMAT_ALLOW_ONELEVEL))
		goto cleanup;

	if ((segments_count == 1 ) &&
	    !(flags & GIT_REFERENCE_FORMAT_REFSPEC_SHORTHAND) &&
		!(is_all_caps_and_underscore(name, (size_t)segment_len) ||
			((flags & GIT_REFERENCE_FORMAT_REFSPEC_PATTERN) && !strcmp("*", name))))
			goto cleanup;

	if ((segments_count > 1)
		&& (is_all_caps_and_underscore(name, strchr(name, '/') - name)))
			goto cleanup;

	error = 0;

cleanup:
	if (error == GIT_EINVALIDSPEC)
		git_error_set(
			GIT_ERROR_REFERENCE,
			"the given reference name '%s' is not valid", name);

	if (error && normalize)
		git_buf_dispose(buf);

#ifdef GIT_USE_ICONV
	git_path_iconv_clear(&ic);
#endif

	return error;
}