* filename_cmp.c: New file.

        * Makefile.in (CFILES): Add filename_cmp.c.
        (REQUIRED_OFILES): Add filename_cmp.o
        (filename_cmp.o): New rule.
        * functions.texi: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@123342 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 108 insertions, 5 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 5c2f527c102..006c354c987 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,11 @@
+2007-03-29  Joel Brobecker  <brobecker@adacore.com>
+
+	* filename_cmp.c: New file.
+	* Makefile.in (CFILES): Add filename_cmp.c.
+	(REQUIRED_OFILES): Add filename_cmp.o
+	(filename_cmp.o): New rule.
+	* functions.texi: Regenerate.
+
 2007-03-15  Geoffrey Keating  <geoffk@apple.com>
 
 	* cp-demangle.c (d_encoding): Exit early on error.
diff --git a/libiberty/Makefile.in b/libiberty/Makefile.in
index 90686f00b15..4f5e2152783 100644
--- a/libiberty/Makefile.in
+++ b/libiberty/Makefile.in
@@ -1,6 +1,6 @@
 #
 # Makefile
-#   Copyright (C) 1990, 91-99, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+#   Copyright (C) 1990, 91-99, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 #   Free Software Foundation
 #
 # This file is part of the libiberty library.
@@ -131,8 +131,8 @@ CFILES = alloca.c argv.c asprintf.c atexit.c				\
 	calloc.c choose-temp.c clock.c concat.c cp-demangle.c		\
 	 cp-demint.c cplus-dem.c					\
 	dyn-string.c							\
-	fdmatch.c ffs.c fibheap.c floatformat.c fnmatch.c		\
-	 fopen_unlocked.c						\
+	fdmatch.c ffs.c fibheap.c filename_cmp.c floatformat.c		\
+	fnmatch.c fopen_unlocked.c					\
 	getcwd.c getopt.c getopt1.c getpagesize.c getpwd.c getruntime.c	\
          gettimeofday.c                                                 \
 	hashtab.c hex.c							\
@@ -165,8 +165,8 @@ REQUIRED_OFILES = ./regex.o ./cplus-dem.o ./cp-demangle.o ./md5.o	\
 	./alloca.o ./argv.o						\
 	./choose-temp.o ./concat.o ./cp-demint.o			\
 	./dyn-string.o							\
-	./fdmatch.o ./fibheap.o ./floatformat.o ./fnmatch.o		\
-	 ./fopen_unlocked.o						\
+	./fdmatch.o ./fibheap.o ./filename_cmp.o ./floatformat.o	\
+	./fnmatch.o ./fopen_unlocked.o					\
 	./getopt.o ./getopt1.o ./getpwd.o ./getruntime.o		\
 	./hashtab.o ./hex.o						\
 	./lbasename.o ./lrealpath.o					\
@@ -651,6 +651,12 @@ $(CONFIGURED_OFILES): stamp-picdir
 	else true; fi
 	$(COMPILE.c) $(srcdir)/fibheap.c $(OUTPUT_OPTION)
 
+./filename_cmp.o: $(srcdir)/filename_cmp.c $(INCDIR)/filenames.h
+	if [ x"$(PICFLAG)" != x ]; then \
+	  $(COMPILE.c) $(PICFLAG) $(srcdir)/filename_cmp.c -o pic/$@; \
+	else true; fi
+	$(COMPILE.c) $(srcdir)/filename_cmp.c $(OUTPUT_OPTION)
+
 ./floatformat.o: $(srcdir)/floatformat.c config.h $(INCDIR)/ansidecl.h \
 	$(INCDIR)/floatformat.h $(INCDIR)/libiberty.h
 	if [ x"$(PICFLAG)" != x ]; then \
diff --git a/libiberty/filename_cmp.c b/libiberty/filename_cmp.c
new file mode 100644
index 00000000000..5e12c82ca41
--- /dev/null
+++ b/libiberty/filename_cmp.c
@@ -0,0 +1,73 @@
+/* File name comparison routine.
+
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include <ctype.h>
+#include "filenames.h"
+
+/*
+
+@deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2})
+
+Return zero if the two paths @var{s1} and @var{s2} are equivalent.
+If not equivalent, the returned value is similar to what strcmp would
+return.  In other words, it returns a negative value if @var{s1} is less
+than @var{s2}, or a positive value if @var{s2} is greater than @var{s2}.
+
+This function does not normalize path names. As a result, this function
+will treat filenames that are spelled differently as different even in
+the case when the two filenames point to the same underlying file.
+However, it does handle the fact that on DOS-like file systems, forward
+and backward slashes are equal.
+
+@end deftypefn
+
+*/
+
+int
+filename_cmp (const char *s1, const char *s2)
+{
+#ifndef HAVE_DOS_BASED_FILE_SYSTEM
+  return strcmp(s1, s2);
+#else
+  for (;;)
+    {
+      int c1 = tolower (*s1);
+      int c2 = tolower (*s2);
+
+      /* On DOS-based file systems, the '/' and the '\' are equivalent.  */
+      if (c1 == '/')
+        c1 = '\\';
+      if (c2 == '/')
+        c2 = '\\';
+
+      if (c1 != c2)
+        return (c1 - c2);
+
+      if (c1 == '\0')
+        return 0;
+
+      s1++;
+      s2++;
+    }
+#endif
+}
+
diff --git a/libiberty/functions.texi b/libiberty/functions.texi
index 9f49ff484d6..fd3e8e74ea7 100644
--- a/libiberty/functions.texi
+++ b/libiberty/functions.texi
@@ -268,6 +268,22 @@ value 1).  If @var{valu} is zero, zero is returned.
 
 @end deftypefn
 
+@c filename_cmp.c:28
+@deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2})
+
+Return zero if the two paths @var{s1} and @var{s2} are equivalent.
+If not equivalent, the returned value is similar to what strcmp would
+return.  In other words, it returns a negative value if @var{s1} is less
+than @var{s2}, or a positive value if @var{s2} is greater than @var{s2}.
+
+This function does not normalize path names. As a result, this function
+will treat filenames that are spelled differently as different even in
+the case when the two filenames point to the same underlying file.
+However, it does handle the fact that on DOS-like file systems, forward
+and backward slashes are equal.
+
+@end deftypefn
+
 @c fnmatch.txh:1
 @deftypefn Replacement int fnmatch (const char *@var{pattern}, const char *@var{string}, int @var{flags})