package/dc3dd/0004-Make-getdate.y-compile-on-QNX-and-NetBSD-5-i386.patch

From: Bruno Haible <bruno@clisp.org>
Date: Thu, 17 Sep 2009 22:42:33 +0200
Subject: Make getdate.y compile on QNX and NetBSD 5 / i386.

Forwarded: https://sourceforge.net/p/dc3dd/bugs/23/
Origin: https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=a68c9ab3cfc8ac7cf2a709b0c1aa93229f8635e6
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Upstream: https://sources.debian.org/patches/dc3dd/7.3.1-3/Make-getdate.y-compile-on-QNX-and-NetBSD-5-i386.patch/
---
 lib/getdate.y | 33 ++++++++++++++++++++++-----------
 m4/getdate.m4 | 14 ++++++++++++++
 2 files changed, 36 insertions(+), 11 deletions(-)

diff --git a/lib/getdate.y b/lib/getdate.y
index 1deec51..d2c23f2 100644
--- a/lib/getdate.y
+++ b/lib/getdate.y
@@ -108,12 +108,21 @@
 
 #define HOUR(x) ((x) * 60)
 
-/* Lots of this code assumes time_t and time_t-like values fit into
-   long int.  It also assumes that signed integer overflow silently
-   wraps around, but there's no portable way to check for that at
-   compile-time.  */
+/* long_time_t is a signed integer type that contains all time_t values.  */
 verify (TYPE_IS_INTEGER (time_t));
-verify (LONG_MIN <= TYPE_MINIMUM (time_t) && TYPE_MAXIMUM (time_t) <= LONG_MAX);
+#if TIME_T_FITS_IN_LONG_INT
+typedef long int long_time_t;
+#else
+typedef time_t long_time_t;
+#endif
+
+/* Lots of this code assumes time_t and time_t-like values fit into
+   long_time_t.  */
+verify (TYPE_MINIMUM (long_time_t) <= TYPE_MINIMUM (time_t)
+        && TYPE_MAXIMUM (time_t) <= TYPE_MAXIMUM (long_time_t));
+
+/* FIXME: It also assumes that signed integer overflow silently wraps around,
+   but this is not true any more with recent versions of GCC 4.  */
 
 /* An integer value, and the number of digits in its textual
    representation.  */
@@ -146,7 +155,7 @@ typedef struct
   long int day;
   long int hour;
   long int minutes;
-  long int seconds;
+  long_time_t seconds;
   long int ns;
 } relative_time;
 
@@ -1492,20 +1501,22 @@ get_date (struct timespec *result, char const *p, struct timespec const *now)
 	time_t t1 = t0 + d1;
 	long int d2 = 60 * pc.rel.minutes;
 	time_t t2 = t1 + d2;
-	long int d3 = pc.rel.seconds;
-	time_t t3 = t2 + d3;
+	long_time_t d3 = pc.rel.seconds;
+	long_time_t t3 = t2 + d3;
 	long int d4 = (sum_ns - normalized_ns) / BILLION;
-	time_t t4 = t3 + d4;
+	long_time_t t4 = t3 + d4;
+	time_t t5 = t4;
 
 	if ((d1 / (60 * 60) ^ pc.rel.hour)
 	    | (d2 / 60 ^ pc.rel.minutes)
 	    | ((t1 < t0) ^ (d1 < 0))
 	    | ((t2 < t1) ^ (d2 < 0))
 	    | ((t3 < t2) ^ (d3 < 0))
-	    | ((t4 < t3) ^ (d4 < 0)))
+	    | ((t4 < t3) ^ (d4 < 0))
+	    | (t5 != t4))
 	  goto fail;
 
-	result->tv_sec = t4;
+	result->tv_sec = t5;
 	result->tv_nsec = normalized_ns;
       }
     }
diff --git a/m4/getdate.m4 b/m4/getdate.m4
index d160329..cfbb86f 100644
--- a/m4/getdate.m4
+++ b/m4/getdate.m4
@@ -30,4 +30,18 @@ AC_DEFUN([gl_GETDATE],
   AC_STRUCT_TIMEZONE
   AC_REQUIRE([gl_CLOCK_TIME])
   AC_REQUIRE([gl_TM_GMTOFF])
+  AC_COMPILE_IFELSE(
+    [AC_LANG_SOURCE([[
+#include <time.h> /* for time_t */
+#include <limits.h> /* for CHAR_BIT, LONG_MIN, LONG_MAX */
+#define TYPE_MINIMUM(t) \
+  ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
+#define TYPE_MAXIMUM(t) \
+  ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
+typedef int verify_min[2 * (LONG_MIN <= TYPE_MINIMUM (time_t)) - 1];
+typedef int verify_max[2 * (TYPE_MAXIMUM (time_t) <= LONG_MAX) - 1];
+       ]])],
+    [AC_DEFINE([TIME_T_FITS_IN_LONG_INT], [1],
+       [Define to 1 if all 'time_t' values fit in a 'long int'.])
+    ])
 ])