parse-duration: eliminate 68-year duration limit

* lib/parse-duration.c: Include "intprops.h".
(TIME_MAX): Rename to MAX_DURATION and define to
TYPE_MAXIMUM(time_t).
* modules/parse-duration (Depends-on): Add intprops.
Reported by Jonas 'Sortie' Termansen.

ChangeLog

@@ -1,3 +1,13 @@
+2014-06-11  Bruce Korb  <bkorb@gnu.org>
+	Jim Meyering  <meyering@fb.com>
+
+	parse-duration: eliminate 68-year duration limit
+	* lib/parse-duration.c: Include "intprops.h".
+	(TIME_MAX): Rename to MAX_DURATION and define to
+	TYPE_MAXIMUM(time_t).
+	* modules/parse-duration (Depends-on): Add intprops.
+	Reported by Jonas 'Sortie' Termansen.
+
 2014-06-14  Paul Eggert  <eggert@cs.ucla.edu>
 
 	pthread: don't assume AC_CANONICAL_HOST, port better to Solaris, etc.

lib/parse-duration.c

@@ -27,6 +27,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "intprops.h"
+
 #ifndef NUL
 #define NUL '\0'
 #endif
@@ -51,7 +53,8 @@ typedef enum {
 #define SEC_PER_MONTH   (SEC_PER_DAY * 30)
 #define SEC_PER_YEAR    (SEC_PER_DAY * 365)
 
-#define TIME_MAX        0x7FFFFFFF
+#undef  MAX_DURATION
+#define MAX_DURATION    TYPE_MAXIMUM(time_t)
 
 /* Wrapper around strtoul that does not require a cast.  */
 static unsigned long
@@ -80,14 +83,14 @@ scale_n_add (time_t base, time_t val, int scale)
       return BAD_TIME;
     }
 
-  if (val > TIME_MAX / scale)
+  if (val > MAX_DURATION / scale)
     {
       errno = ERANGE;
       return BAD_TIME;
     }
 
   val *= scale;
-  if (base > TIME_MAX - val)
+  if (base > MAX_DURATION - val)
     {
       errno = ERANGE;
       return BAD_TIME;

modules/parse-duration

@@ -6,6 +6,7 @@ lib/parse-duration.h
 lib/parse-duration.c
 
 Depends-on:
+intprops
 
 configure.ac: