1 /* dirname.c -- return all but the last element in a path
3 Copyright (C) 1990, 1998, 2000, 2001, 2003, 2004 Free Software
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 /* Return the length of `dirname (PATH)', or zero if PATH is
30 in the working directory. Works properly even if
31 there are trailing slashes (by effectively ignoring them). */
33 dir_len (char const *path)
35 size_t prefix_length = FILE_SYSTEM_PREFIX_LEN (path);
38 /* Strip the basename and any redundant slashes before it. */
39 for (length = base_name (path) - path; prefix_length < length; length--)
40 if (! ISSLASH (path[length - 1]))
43 /* But don't strip the only slash from "/". */
44 return prefix_length + ISSLASH (path[prefix_length]);
47 /* Return the leading directories part of PATH,
48 allocated with xmalloc.
49 Works properly even if there are trailing slashes
50 (by effectively ignoring them). */
53 dir_name (char const *path)
55 size_t length = dir_len (path);
56 bool append_dot = (length == FILE_SYSTEM_PREFIX_LEN (path));
57 char *newpath = xmalloc (length + append_dot + 1);
58 memcpy (newpath, path, length);
60 newpath[length++] = '.';
68 Run the test like this (expect no output):
69 gcc -DHAVE_CONFIG_H -DTEST_DIRNAME -I.. -O -Wall \
70 basename.c dirname.c xmalloc.c error.c
71 sed -n '/^BEGIN-DATA$/,/^END-DATA$/p' dirname.c|grep -v DATA|./a.out
73 If it's been built on a DOS or Windows platforms, run another test like
74 this (again, expect no output):
75 sed -n '/^BEGIN-DOS-DATA$/,/^END-DOS-DATA$/p' dirname.c|grep -v DATA|./a.out
96 # define MAX_BUFF_LEN 1024
102 main (int argc, char *argv[])
104 char buff[MAX_BUFF_LEN + 1];
106 program_name = argv[0];
108 buff[MAX_BUFF_LEN] = 0;
109 while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
111 char path[MAX_BUFF_LEN];
112 char expected_result[MAX_BUFF_LEN];
114 sscanf (buff, "%s %s", path, expected_result);
115 result = dir_name (path);
116 if (strcmp (result, expected_result))
117 printf ("%s: got %s, expected %s\n", path, result, expected_result);