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authorDJ Delorie <dj@redhat.com>2001-03-10 22:23:50 +0000
committerDJ Delorie <dj@redhat.com>2001-03-10 22:23:50 +0000
commit8aa30e60ce16468892f60cf7ea377f0d83861ab0 (patch)
tree2ca684a19f5fbfe38686f6691a143d2db61901e4 /libiberty/lbasename.c
parent21479deda01ad5fe23f41c69a46c10b7806ca5fa (diff)
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+/* Libiberty basename. Like basename, but is not overridden by the
+ system C library.
+ Copyright (C) 2001 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. */
+
+/*
+NAME
+ lbasename -- return pointer to last component of a pathname
+
+SYNOPSIS
+ char *lbasename (const char *name)
+
+DESCRIPTION
+ Given a pointer to a string containing a typical pathname
+ (/usr/src/cmd/ls/ls.c for example), returns a pointer to the
+ last component of the pathname ("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 '/' returns the empty string after it.
+*/
+
+#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
+
+/* Define IS_DIR_SEPARATOR. VMS uses '::', ':', '[...]' and '<...>' to
+ separate the different components of a file specification. It's a
+ bit of a stretch to call ':', ']' and '>' directory separators, so
+ just define the test to find the file name component. */
+#ifdef VMS
+# define IS_DIR_SEPARATOR(ch) ((ch) == ':' || (ch) == ']' || (ch) == '>')
+#else
+# 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
+#endif
+
+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 (char *) base;
+}