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/* Return the name-within-directory of a file name.
Copyright (C) 1996-1999, 2000-2002, 2004, 2006 Free Software Foundation, Inc.
NOTE: The canonical source of this file is maintained with the GNU C Library.
Bugs can be reported to bug-glibc@gnu.org.
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 3 of the License, or 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, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "basename.h"
#if !(__GLIBC__ >= 2)
#include <stdio.h>
#include <assert.h>
#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
/* Win32, Cygwin, OS/2, DOS */
# define HAS_DEVICE(P) \
((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
&& (P)[1] == ':')
# define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
# define ISSLASH(C) ((C) == '/' || (C) == '\\')
#endif
#ifndef FILE_SYSTEM_PREFIX_LEN
# define FILE_SYSTEM_PREFIX_LEN(Filename) 0
#endif
#ifndef ISSLASH
# define ISSLASH(C) ((C) == '/')
#endif
#ifndef _LIBC
/* We cannot generally use the name `basename' since XPG defines an unusable
variant of the function but we cannot use it. */
# undef basename
# define basename gnu_basename
#endif
/* 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.
If NAME is all slashes, be sure to return `/'. */
char *
basename (char const *name)
{
char const *base = name += FILE_SYSTEM_PREFIX_LEN (name);
int all_slashes = 1;
char const *p;
for (p = name; *p; p++)
{
if (ISSLASH (*p))
base = p + 1;
else
all_slashes = 0;
}
/* If NAME is all slashes, arrange to return `/'. */
if (*base == '\0' && ISSLASH (*name) && all_slashes)
--base;
/* Make sure the last byte is not a slash. */
assert (all_slashes || !ISSLASH (*(p - 1)));
return (char *) base;
}
#endif
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