# HG changeset patch
# User Paul Eggert <eggert@cs.ucla.edu>
# Date 1116445576 0
# Node ID d284693d309ce4d57d3f9187ef5d6b424c6cef28
# Parent  b56e4ab06e2e9eb000aab8d236c5f17ca4a968cf
* lib/canonicalize.c: Include canonicalize.h first, to test interface.
Include <stddef.h> unconditionally, since we assume C89 now.
All uses of PTR_INT_TYPE replaced by ptrdiff_t.
* m4/canonicalize.m4 (AC_FUNC_CANONICALIZE_FILE_NAME]):
Don't check for stddef.h.

diff --git a/lib/canonicalize.c b/lib/canonicalize.c
--- a/lib/canonicalize.c
+++ b/lib/canonicalize.c
@@ -20,6 +20,8 @@
 # include <config.h>
 #endif
 
+#include "canonicalize.h"
+
 #ifdef STDC_HEADERS
 # include <stdlib.h>
 #else
@@ -43,6 +45,7 @@
 #endif
 
 #include <errno.h>
+#include <stddef.h>
 
 #include "cycle-check.h"
 #include "path-concat.h"
@@ -54,24 +57,6 @@
 # define __set_errno(Val) errno = (Val)
 #endif
 
-/* If __PTRDIFF_TYPE__ is
-   defined, as with GNU C, use that; that way we don't pollute the
-   namespace with <stddef.h>'s symbols.  Otherwise, if <stddef.h> is
-   available, include it and use ptrdiff_t.  In traditional C, long is
-   the best that we can do.  */
-
-#ifdef __PTRDIFF_TYPE__
-# define PTR_INT_TYPE __PTRDIFF_TYPE__
-#else
-# ifdef HAVE_STDDEF_H
-#  include <stddef.h>
-#  define PTR_INT_TYPE ptrdiff_t
-# else
-#  define PTR_INT_TYPE long
-# endif
-#endif
-
-#include "canonicalize.h"
 #include "pathmax.h"
 #include "xreadlink.h"
 
@@ -230,7 +215,7 @@
 
 	  if (dest + (end - start) >= rpath_limit)
 	    {
-	      PTR_INT_TYPE dest_offset = dest - rpath;
+	      ptrdiff_t dest_offset = dest - rpath;
 	      size_t new_size = rpath_limit - rpath;
 
 	      if (end - start + 1 > PATH_MAX)
diff --git a/m4/canonicalize.m4 b/m4/canonicalize.m4
--- a/m4/canonicalize.m4
+++ b/m4/canonicalize.m4
@@ -1,4 +1,4 @@
-#serial 7
+#serial 8
 
 # Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -13,6 +13,6 @@
     AC_LIBOBJ([canonicalize])
 
     AC_REQUIRE([AC_HEADER_STDC])
-    AC_CHECK_HEADERS(string.h sys/param.h stddef.h)
+    AC_CHECK_HEADERS(string.h sys/param.h)
     AC_CHECK_FUNCS(resolvepath canonicalize_file_name)
   ])