lbasename.c
2.33 KB
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/* Libiberty basename. Like basename, but is not overridden by the
system C library.
Copyright (C) 2001, 2002 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/*
@deftypefn Replacement {const char*} lbasename (const char *@var{name})
Given a pointer to a string containing a typical pathname
(@samp{/usr/src/cmd/ls/ls.c} for example), returns a pointer to the
last component of the pathname (@samp{ls.c} in this case). The
returned pointer is guaranteed to lie within the original
string. This latter fact is not true of many vendor C
libraries, which return special strings or modify the passed
strings for particular input.
In particular, the empty string returns the same empty string,
and a path ending in @code{/} returns the empty string after it.
@end deftypefn
*/
#include "ansidecl.h"
#include "libiberty.h"
#include "safe-ctype.h"
#ifndef DIR_SEPARATOR
# define DIR_SEPARATOR '/'
#endif
#if defined (_WIN32) || defined (__MSDOS__) \
|| defined (__DJGPP__) || defined (__OS2__)
# define HAVE_DOS_BASED_FILE_SYSTEM
# ifndef DIR_SEPARATOR_2
# define DIR_SEPARATOR_2 '\\'
# endif
#endif
#ifndef DIR_SEPARATOR_2
# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
#else
# define IS_DIR_SEPARATOR(ch) \
(((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
#endif
const char *
lbasename (name)
const char *name;
{
const char *base;
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
/* Skip over a possible disk name. */
if (ISALPHA (name[0]) && name[1] == ':')
name += 2;
#endif
for (base = name; *name; name++)
if (IS_DIR_SEPARATOR (*name))
base = name + 1;
return base;
}