From: Jim Meyering <jim@meyering.net>
Date: Tue, 24 Feb 1998 23:33:41 +0000 (+0000)
Subject: (TYPE_SIGNED): Define.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5472ac4203d9136f7b50ac075b971f1dfda7aba4;p=pspp

(TYPE_SIGNED): Define.
(TYPE_MAXIMUM): Define.
(ULONG_MAX): Use TYPE_MAXIMUM.
(LONG_MAX): Use TYPE_MAXIMUM.
---

diff --git a/lib/xstrtol.c b/lib/xstrtol.c
index ad2bcdbf10..29dc0773f8 100644
--- a/lib/xstrtol.c
+++ b/lib/xstrtol.c
@@ -1,5 +1,5 @@
 /* A more useful interface to strtol.
-   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 1998 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
@@ -46,12 +46,24 @@ extern int errno;
 # include <limits.h>
 #endif
 
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+/* The extra casts work around common compiler bugs.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+/* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
+   It is necessary at least when t == time_t.  */
+#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
+			      ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
+#define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
+
 #ifndef ULONG_MAX
-# define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
+# define ULONG_MAX TYPE_MAXIMUM (unsigned long int)
 #endif
 
 #ifndef LONG_MAX
-# define LONG_MAX ((long int) (ULONG_MAX >> 1))
+# define LONG_MAX TYPE_MAXIMUM (long int)
 #endif
 
 #include "xstrtol.h"