mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/* dirname.c -- return all but the last element in a path
|
|
Copyright (C) 1990, 1998, 2000, 2001, 2003 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include "dirname.h"
|
|
|
|
#include <string.h>
|
|
#include "xalloc.h"
|
|
|
|
/* Return the length of `dirname (PATH)', or zero if PATH is
|
|
in the working directory. Works properly even if
|
|
there are trailing slashes (by effectively ignoring them). */
|
|
size_t
|
|
dir_len (char const *path)
|
|
{
|
|
size_t prefix_length = FILESYSTEM_PREFIX_LEN (path);
|
|
size_t length;
|
|
|
|
/* Strip the basename and any redundant slashes before it. */
|
|
for (length = base_name (path) - path; prefix_length < length; length--)
|
|
if (! ISSLASH (path[length - 1]))
|
|
return length;
|
|
|
|
/* But don't strip the only slash from "/". */
|
|
return prefix_length + ISSLASH (path[prefix_length]);
|
|
}
|
|
|
|
/* Return the leading directories part of PATH,
|
|
allocated with xmalloc.
|
|
Works properly even if there are trailing slashes
|
|
(by effectively ignoring them). */
|
|
|
|
char *
|
|
dir_name (char const *path)
|
|
{
|
|
size_t length = dir_len (path);
|
|
int append_dot = (length == FILESYSTEM_PREFIX_LEN (path));
|
|
char *newpath = xmalloc (length + append_dot + 1);
|
|
memcpy (newpath, path, length);
|
|
if (append_dot)
|
|
newpath[length++] = '.';
|
|
newpath[length] = 0;
|
|
return newpath;
|
|
}
|
|
|
|
#ifdef TEST_DIRNAME
|
|
/*
|
|
|
|
Run the test like this (expect no output):
|
|
gcc -DHAVE_CONFIG_H -DTEST_DIRNAME -I.. -O -Wall \
|
|
basename.c dirname.c xmalloc.c error.c
|
|
sed -n '/^BEGIN-DATA$/,/^END-DATA$/p' dirname.c|grep -v DATA|./a.out
|
|
|
|
If it's been built on a DOS or Windows platforms, run another test like
|
|
this (again, expect no output):
|
|
sed -n '/^BEGIN-DOS-DATA$/,/^END-DOS-DATA$/p' dirname.c|grep -v DATA|./a.out
|
|
|
|
BEGIN-DATA
|
|
foo//// .
|
|
bar/foo//// bar
|
|
foo/ .
|
|
/ /
|
|
. .
|
|
a .
|
|
END-DATA
|
|
|
|
BEGIN-DOS-DATA
|
|
c:///// c:/
|
|
c:/ c:/
|
|
c:/. c:/
|
|
c:foo c:.
|
|
c:foo/bar c:foo
|
|
END-DOS-DATA
|
|
|
|
*/
|
|
|
|
# define MAX_BUFF_LEN 1024
|
|
# include <stdio.h>
|
|
|
|
char *program_name;
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
char buff[MAX_BUFF_LEN + 1];
|
|
|
|
program_name = argv[0];
|
|
|
|
buff[MAX_BUFF_LEN] = 0;
|
|
while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
|
|
{
|
|
char path[MAX_BUFF_LEN];
|
|
char expected_result[MAX_BUFF_LEN];
|
|
char const *result;
|
|
sscanf (buff, "%s %s", path, expected_result);
|
|
result = dir_name (path);
|
|
if (strcmp (result, expected_result))
|
|
printf ("%s: got %s, expected %s\n", path, result, expected_result);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|