static int diff_context_line__simple(
git_diff_driver *driver, git_buf *line)
{
char firstch = line->ptr[0];
GIT_UNUSED(driver);
return (git__isalpha(firstch) || firstch == '_' || firstch == '$');
}
int git_path_resolve_relative(git_buf *path, size_t ceiling)
{
char *base, *to, *from, *next;
size_t len;
if (!path || git_buf_oom(path))
return -1;
if (ceiling > path->size)
ceiling = path->size;
/* recognize drive prefixes, etc. that should not be backed over */
if (ceiling == 0)
ceiling = git_path_root(path->ptr) + 1;
/* recognize URL prefixes that should not be backed over */
if (ceiling == 0) {
for (next = path->ptr; *next && git__isalpha(*next); ++next);
if (next[0] == ':' && next[1] == '/' && next[2] == '/')
ceiling = (next + 3) - path->ptr;
}
base = to = from = path->ptr + ceiling;
while (*from) {
for (next = from; *next && *next != '/'; ++next);
len = next - from;
if (len == 1 && from[0] == '.')
/* do nothing with singleton dot */;
else if (len == 2 && from[0] == '.' && from[1] == '.') {
while (to > base && to[-1] == '/') to--;
while (to > base && to[-1] != '/') to--;
}
else {
if (*next == '/')
len++;
if (to != from)
memmove(to, from, len);
to += len;
}
from += len;
while (*from == '/') from++;
}
*to = '\0';
path->size = to - path->ptr;
return 0;
}
static int git_style_unc_path(git_buf *buf, const char *host, const char *path)
{
git_buf_clear(buf);
if (host)
git_buf_printf(buf, "//%s/", host);
if (path[0] == '/')
path++;
if (git__isalpha(path[0]) && path[1] == ':' && path[2] == '/') {
git_buf_printf(buf, "%c$/", path[0]);
path += 3;
}
git_buf_puts(buf, path);
return git_buf_oom(buf) ? -1 : 0;
}
int git_path_resolve_relative(git_buf *path, size_t ceiling)
{
char *base, *to, *from, *next;
size_t len;
if (!path || git_buf_oom(path))
return -1;
if (ceiling > path->size)
ceiling = path->size;
/* recognize drive prefixes, etc. that should not be backed over */
if (ceiling == 0)
ceiling = git_path_root(path->ptr) + 1;
/* recognize URL prefixes that should not be backed over */
if (ceiling == 0) {
for (next = path->ptr; *next && git__isalpha(*next); ++next);
if (next[0] == ':' && next[1] == '/' && next[2] == '/')
ceiling = (next + 3) - path->ptr;
}
base = to = from = path->ptr + ceiling;
while (*from) {
for (next = from; *next && *next != '/'; ++next);
len = next - from;
if (len == 1 && from[0] == '.')
/* do nothing with singleton dot */;
else if (len == 2 && from[0] == '.' && from[1] == '.') {
/* error out if trying to up one from a hard base */
if (to == base && ceiling != 0) {
giterr_set(GITERR_INVALID,
"Cannot strip root component off url");
return -1;
}
/* no more path segments to strip,
* use '../' as a new base path */
if (to == base) {
if (*next == '/')
len++;
if (to != from)
memmove(to, from, len);
to += len;
/* this is now the base, can't back up from a
* relative prefix */
base = to;
} else {
/* back up a path segment */
while (to > base && to[-1] == '/') to--;
while (to > base && to[-1] != '/') to--;
}
} else {
if (*next == '/' && *from != '/')
len++;
if (to != from)
memmove(to, from, len);
to += len;
}
from += len;
while (*from == '/') from++;
}
*to = '\0';
path->size = to - path->ptr;
return 0;
}
