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71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* basename.c -- return the last element in a path
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Copyright (C) 1990, 1998, 1999, 2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#ifndef FILESYSTEM_PREFIX_LEN
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# define FILESYSTEM_PREFIX_LEN(Filename) 0
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#endif
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#ifndef PARAMS
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# if defined PROTOTYPES || (defined __STDC__ && __STDC__)
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# define PARAMS(Args) Args
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# else
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# define PARAMS(Args) ()
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# endif
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#endif
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#ifndef ISSLASH
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# define ISSLASH(C) ((C) == '/')
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#endif
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char *base_name PARAMS ((char const *name));
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/* In general, we can't use the builtin `basename' function if available,
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since it has different meanings in different environments.
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In some environments the builtin `basename' modifies its argument.
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If NAME is all slashes, be sure to return `/'. */
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char *
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base_name (char const *name)
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{
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char const *base = name += FILESYSTEM_PREFIX_LEN (name);
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int all_slashes = 1;
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char const *p;
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for (p = name; *p; p++)
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{
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if (ISSLASH (*p))
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base = p + 1;
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else
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all_slashes = 0;
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}
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/* If NAME is all slashes, arrange to return `/'. */
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if (*base == '\0' && ISSLASH (*name) && all_slashes)
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--base;
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/* Make sure the last byte is not a slash. */
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assert (all_slashes || !ISSLASH (*(p - 1)));
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return (char *) base;
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}
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