lbasename.c

[Neil Booth <neil at daikokuya dot demon dot co dot uk>]

As dicussed with DJ; this puts lbasename on the branch.

Neil.

	* libiberty.h: Declare lbasename ().
	* lbasename.c: New file / function, always compiled in.
	* Makefile.in: Always compile and link lbasename.c.  Add
	target for lbasename.o.

Index: include/libiberty.h
===================================================================
RCS file: /cvs/gcc/gcc/include/libiberty.h,v
retrieving revision 1.14
diff -u -p -r1.14 libiberty.h
--- libiberty.h	2000/11/22 08:32:26	1.14
+++ libiberty.h	2001/03/24 16:39:51
@@ -56,6 +56,10 @@ extern char *basename ();
 # endif
 #endif
 
+/* A well-defined basename () that is always compiled in.  */
+
+extern char *lbasename PARAMS ((const char *));
+
 /* Concatenate an arbitrary number of strings, up to (char *) NULL.
    Allocates memory using xmalloc.  */
 
Index: libiberty/Makefile.in
===================================================================
RCS file: /cvs/gcc/gcc/libiberty/Makefile.in,v
retrieving revision 1.57
diff -u -p -r1.57 Makefile.in
--- Makefile.in	2000/12/08 23:16:27	1.57
+++ Makefile.in	2001/03/24 16:40:07
@@ -128,7 +128,8 @@ CFILES = asprintf.c alloca.c argv.c atex
 	bzero.c calloc.c choose-temp.c clock.c concat.c cplus-dem.c	      \
         cp-demangle.c dyn-string.c fdmatch.c fnmatch.c getcwd.c		      \
 	getpwd.c getopt.c getopt1.c getpagesize.c getruntime.c		      \
-	floatformat.c hashtab.c hex.c index.c insque.c md5.c memchr.c         \
+	floatformat.c hashtab.c hex.c index.c insque.c lbasename.c	      \
+	md5.c memchr.c							      \
 	memcmp.c memcpy.c memmove.c memset.c mkstemps.c objalloc.c obstack.c  \
 	partition.c pexecute.c putenv.c random.c rename.c rindex.c setenv.c   \
 	sigsetmask.c safe-ctype.c sort.c spaces.c splay-tree.c strcasecmp.c   \
@@ -140,7 +141,8 @@ CFILES = asprintf.c alloca.c argv.c atex
 # These are always included in the library.
 REQUIRED_OFILES = argv.o choose-temp.o concat.o cplus-dem.o cp-demangle.o     \
 	dyn-string.o fdmatch.o fnmatch.o getopt.o getopt1.o getpwd.o          \
-	getruntime.o hashtab.o hex.o floatformat.o md5.o objalloc.o obstack.o \
+	getruntime.o hashtab.o hex.o floatformat.o lbasename.o md5.o	      \
+	objalloc.o obstack.o						      \
 	partition.o pexecute.o safe-ctype.o sort.o spaces.o splay-tree.o      \
 	strerror.o strsignal.o xatexit.o xexit.o xmalloc.o xmemdup.o          \
 	xstrdup.o xstrerror.o
@@ -276,6 +278,7 @@ getpwd.o: config.h $(INCDIR)/libiberty.h
 getruntime.o: config.h $(INCDIR)/libiberty.h
 hex.o: $(INCDIR)/libiberty.h
 floatformat.o: $(INCDIR)/floatformat.h
+lbasename.o: $(INCDIR)/libiberty.h
 mkstemps.o: config.h
 md5.o: config.h
 objalloc.o: config.h $(INCDIR)/objalloc.h
Index: libiberty/lbasename.c
===================================================================
RCS file: lbasename.c
diff -N lbasename.c
--- /dev/null	Tue May  5 13:32:27 1998
+++ lbasename.c	Sat Mar 24 08:40:07 2001
@@ -0,0 +1,89 @@
+/* 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;
+}