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[/] [or1k/] [trunk/] [insight/] [libiberty/] [lbasename.c] - Blame information for rev 1774

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1 578 markom
/* Libiberty basename.  Like basename, but is not overridden by the
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   system C library.
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   Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB.  If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.  */
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/*
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NAME
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        lbasename -- return pointer to last component of a pathname
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SYNOPSIS
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        char *lbasename (const char *name)
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DESCRIPTION
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        Given a pointer to a string containing a typical pathname
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        (/usr/src/cmd/ls/ls.c for example), returns a pointer to the
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        last component of the pathname ("ls.c" in this case).  The
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        returned pointer is guaranteed to lie within the original
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        string.  This latter fact is not true of many vendor C
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        libraries, which return special strings or modify the passed
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        strings for particular input.
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        In particular, the empty string returns the same empty string,
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        and a path ending in '/' returns the empty string after it.
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*/
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#include "ansidecl.h"
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#include "libiberty.h"
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#include "safe-ctype.h"
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#ifndef DIR_SEPARATOR
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#  define DIR_SEPARATOR '/'
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#endif
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#if defined (_WIN32) || defined (__MSDOS__) \
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    || defined (__DJGPP__) || defined (__OS2__)
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#  define HAVE_DOS_BASED_FILE_SYSTEM
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#  ifndef DIR_SEPARATOR_2 
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#    define DIR_SEPARATOR_2 '\\'
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#  endif
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#endif
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/* Define IS_DIR_SEPARATOR. VMS uses '::', ':', '[...]' and '<...>' to
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   separate the different components of a file specification.  It's a
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   bit of a stretch to call ':', ']' and '>' directory separators, so
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   just define the test to find the file name component.  */
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#ifdef VMS
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#  define IS_DIR_SEPARATOR(ch) ((ch) == ':' || (ch) == ']' || (ch) == '>')
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#else
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#  ifndef DIR_SEPARATOR_2
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#    define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
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#  else
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#    define IS_DIR_SEPARATOR(ch) \
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        (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
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#  endif
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#endif
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char *
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lbasename (name)
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     const char *name;
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{
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  const char *base;
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#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
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  /* Skip over a possible disk name.  */
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  if (ISALPHA (name[0]) && name[1] == ':')
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    name += 2;
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#endif
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  for (base = name; *name; name++)
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    if (IS_DIR_SEPARATOR (*name))
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      base = name + 1;
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  return (char *) base;
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}

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