示例#1
0
static bool _check_dir_contents(
	git_buf *dir,
	const char *sub,
	bool (*predicate)(const char *))
{
	bool result;
	size_t dir_size = git_buf_len(dir);
	size_t sub_size = strlen(sub);
	size_t alloc_size;

	/* leave base valid even if we could not make space for subdir */
	if (GIT_ADD_SIZET_OVERFLOW(&alloc_size, dir_size, sub_size) ||
		GIT_ADD_SIZET_OVERFLOW(&alloc_size, alloc_size, 2) ||
		git_buf_try_grow(dir, alloc_size, false, false) < 0)
		return false;

	/* save excursion */
	git_buf_joinpath(dir, dir->ptr, sub);

	result = predicate(dir->ptr);

	/* restore path */
	git_buf_truncate(dir, dir_size);
	return result;
}
示例#2
0
int git_path_make_relative(git_buf *path, const char *parent)
{
	const char *p, *q, *p_dirsep, *q_dirsep;
	size_t plen = path->size, newlen, alloclen, depth = 1, i, offset;

	for (p_dirsep = p = path->ptr, q_dirsep = q = parent; *p && *q; p++, q++) {
		if (*p == '/' && *q == '/') {
			p_dirsep = p;
			q_dirsep = q;
		}
		else if (*p != *q)
			break;
	}

	/* need at least 1 common path segment */
	if ((p_dirsep == path->ptr || q_dirsep == parent) &&
		(*p_dirsep != '/' || *q_dirsep != '/')) {
		giterr_set(GITERR_INVALID,
			"%s is not a parent of %s", parent, path->ptr);
		return GIT_ENOTFOUND;
	}

	if (*p == '/' && !*q)
		p++;
	else if (!*p && *q == '/')
		q++;
	else if (!*p && !*q)
		return git_buf_clear(path), 0;
	else {
		p = p_dirsep + 1;
		q = q_dirsep + 1;
	}

	plen -= (p - path->ptr);

	if (!*q)
		return git_buf_set(path, p, plen);

	for (; (q = strchr(q, '/')) && *(q + 1); q++)
		depth++;

	GITERR_CHECK_ALLOC_MULTIPLY(&newlen, depth, 3);
	GITERR_CHECK_ALLOC_ADD(&newlen, newlen, plen);

	GITERR_CHECK_ALLOC_ADD(&alloclen, newlen, 1);

	/* save the offset as we might realllocate the pointer */
	offset = p - path->ptr;
	if (git_buf_try_grow(path, alloclen, 1, 0) < 0)
		return -1;
	p = path->ptr + offset;

	memmove(path->ptr + (depth * 3), p, plen + 1);

	for (i = 0; i < depth; i++)
		memcpy(path->ptr + (i * 3), "../", 3);

	path->size = newlen;
	return 0;
}
示例#3
0
文件: path.c 项目: DJHartley/libgit2
static int _check_dir_contents(
	git_buf *dir,
	const char *sub,
	int append_on_success,
	int (*predicate)(const char *))
{
	int error = GIT_SUCCESS;
	size_t dir_size = dir->size;
	size_t sub_size = strlen(sub);

	/* leave base valid even if we could not make space for subdir */
	if ((error = git_buf_try_grow(dir, dir_size + sub_size + 2)) < GIT_SUCCESS)
		return error;

	/* save excursion */
	git_buf_joinpath(dir, dir->ptr, sub);

	error = (*predicate)(dir->ptr);

	/* restore excursion */
	if (!append_on_success || error != GIT_SUCCESS)
		git_buf_truncate(dir, dir_size);

	return error;
}