mirror of
https://github.com/coreutils/coreutils.git
synced 2024-12-13 20:06:37 +08:00
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/* basename.c -- return the last element in a path
|
|
Copyright (C) 1990, 1998, 1999, 2000, 2001 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
|
|
|
|
#if STDC_HEADERS || HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
#include "dirname.h"
|
|
|
|
/* In general, we can't use the builtin `basename' function if available,
|
|
since it has different meanings in different environments.
|
|
In some environments the builtin `basename' modifies its argument.
|
|
|
|
Return the address of the last file name component of NAME. If
|
|
NAME has no file name components because it is all slashes, return
|
|
NAME if it is empty, the address of its last slash otherwise. */
|
|
|
|
char *
|
|
base_name (char const *name)
|
|
{
|
|
char const *base = name + FILESYSTEM_PREFIX_LEN (name);
|
|
char const *p;
|
|
|
|
for (p = base; *p; p++)
|
|
{
|
|
if (ISSLASH (*p))
|
|
{
|
|
/* Treat multiple adjacent slashes like a single slash. */
|
|
do p++;
|
|
while (ISSLASH (*p));
|
|
|
|
/* If the file name ends in slash, use the trailing slash as
|
|
the basename if no non-slashes have been found. */
|
|
if (! *p)
|
|
{
|
|
if (ISSLASH (*base))
|
|
base = p - 1;
|
|
break;
|
|
}
|
|
|
|
/* *P is a non-slash preceded by a slash. */
|
|
base = p;
|
|
}
|
|
}
|
|
|
|
return (char *) base;
|
|
}
|
|
|
|
/* Return the length of of the basename NAME. Typically NAME is the
|
|
value returned by base_name. Act like strlen (NAME), except omit
|
|
redundant trailing slashes. */
|
|
|
|
size_t
|
|
base_len (char const *name)
|
|
{
|
|
size_t len;
|
|
|
|
for (len = strlen (name); 1 < len && ISSLASH (name[len - 1]); len--)
|
|
continue;
|
|
|
|
return len;
|
|
}
|