int git_path_root(const char *path)
{
int offset = 0;
/* Does the root of the path look like a windows drive ? */
if (LOOKS_LIKE_DRIVE_PREFIX(path))
offset += 2;
#ifdef GIT_WIN32
/* Are we dealing with a windows network path? */
else if ((path[0] == '/' && path[1] == '/' && path[2] != '/') ||
(path[0] == '\\' && path[1] == '\\' && path[2] != '\\'))
{
offset += 2;
/* Skip the computer name segment */
while (path[offset] && path[offset] != '/' && path[offset] != '\\')
offset++;
}
#endif
if (path[offset] == '/' || path[offset] == '\\')
return offset;
return -1; /* Not a real error - signals that path is not rooted */
}
/*
* Determine if the path is a Windows prefix and, if so, returns
* its actual lentgh. If it is not a prefix, returns -1.
*/
static int win32_prefix_length(const char *path, int len)
{
#ifndef GIT_WIN32
GIT_UNUSED(path);
GIT_UNUSED(len);
#else
/*
* Mimic unix behavior where '/.git' returns '/': 'C:/.git' will return
* 'C:/' here
*/
if (len == 2 && LOOKS_LIKE_DRIVE_PREFIX(path))
return 2;
/*
* Similarly checks if we're dealing with a network computer name
* '//computername/.git' will return '//computername/'
*/
if (looks_like_network_computer_name(path, len))
return len;
#endif
return -1;
}
/*
* Based on the Android implementation, BSD licensed.
* Check http://android.git.kernel.org/
*/
int git_path_dirname_r(git_buf *buffer, const char *path)
{
const char *endp;
int result, len;
/* Empty or NULL string gets treated as "." */
if (path == NULL || *path == '\0') {
path = ".";
len = 1;
goto Exit;
}
/* Strip trailing slashes */
endp = path + strlen(path) - 1;
while (endp > path && *endp == '/')
endp--;
/* Find the start of the dir */
while (endp > path && *endp != '/')
endp--;
/* Either the dir is "/" or there are no slashes */
if (endp == path) {
path = (*endp == '/') ? "/" : ".";
len = 1;
goto Exit;
}
do {
endp--;
} while (endp > path && *endp == '/');
/* Cast is safe because max path < max int */
len = (int)(endp - path + 1);
#ifdef GIT_WIN32
/* Mimic unix behavior where '/.git' returns '/': 'C:/.git' will return
'C:/' here */
if (len == 2 && LOOKS_LIKE_DRIVE_PREFIX(path)) {
len = 3;
goto Exit;
}
/* Similarly checks if we're dealing with a network computer name
'//computername/.git' will return '//computername/' */
if (looks_like_network_computer_name(path, len)) {
len++;
goto Exit;
}
#endif
Exit:
result = len;
if (buffer != NULL && git_buf_set(buffer, path, len) < 0)
return -1;
return result;
}