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author | Alain Magloire <alainm@gnu.org> | 2001-04-14 22:03:56 +0000 |
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committer | Alain Magloire <alainm@gnu.org> | 2001-04-14 22:03:56 +0000 |
commit | a21181758fade800c804c10e99d1bef860093ae5 (patch) | |
tree | b32dd7559d177915760be291f8969016cd3172f5 /lib/basename.c | |
parent | d88edc69d744b6975bf74862eb4f4da906bfcc57 (diff) | |
download | mailutils-a21181758fade800c804c10e99d1bef860093ae5.tar.gz mailutils-a21181758fade800c804c10e99d1bef860093ae5.tar.bz2 |
add basename.c
Diffstat (limited to 'lib/basename.c')
-rw-r--r-- | lib/basename.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/basename.c b/lib/basename.c new file mode 100644 index 000000000..36e0f62b1 --- /dev/null +++ b/lib/basename.c @@ -0,0 +1,71 @@ +/* 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 + +#include <stdio.h> +#include <assert.h> + +#ifndef FILESYSTEM_PREFIX_LEN +# define FILESYSTEM_PREFIX_LEN(Filename) 0 +#endif + +#ifndef PARAMS +# if defined PROTOTYPES || (defined __STDC__ && __STDC__) +# define PARAMS(Args) Args +# else +# define PARAMS(Args) () +# endif +#endif + +#ifndef ISSLASH +# define ISSLASH(C) ((C) == '/') +#endif + +char *base_name PARAMS ((char const *name)); + +/* 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 * +base_name (char const *name) +{ + char const *base = name += FILESYSTEM_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; +} |