1 /* Return the name-within-directory of a file name.
2 Copyright (C) 1996-1999, 2000-2002, 2004, 2006 Free Software Foundation, Inc.
4 NOTE: The canonical source of this file is maintained with the GNU C Library.
5 Bugs can be reported to bug-glibc@gnu.org.
7 This program is free software: you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or any
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
31 /* Win32, Cygwin, OS/2, DOS */
32 # define HAS_DEVICE(P) \
33 ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
35 # define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
36 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
39 #ifndef FILE_SYSTEM_PREFIX_LEN
40 # define FILE_SYSTEM_PREFIX_LEN(Filename) 0
44 # define ISSLASH(C) ((C) == '/')
48 /* We cannot generally use the name `basename' since XPG defines an unusable
49 variant of the function but we cannot use it. */
51 # define basename gnu_basename
54 /* In general, we can't use the builtin `basename' function if available,
55 since it has different meanings in different environments.
56 In some environments the builtin `basename' modifies its argument.
57 If NAME is all slashes, be sure to return `/'. */
60 basename (char const *name)
62 char const *base = name += FILE_SYSTEM_PREFIX_LEN (name);
66 for (p = name; *p; p++)
74 /* If NAME is all slashes, arrange to return `/'. */
75 if (*base == '\0' && ISSLASH (*name) && all_slashes)
78 /* Make sure the last byte is not a slash. */
79 assert (all_slashes || !ISSLASH (*(p - 1)));