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From se...@apache.org
Subject svn commit: r332411 - in /incubator/stdcxx/trunk: etc/config/src/NO_INT_TRAPS.cpp include/limits
Date Fri, 11 Nov 2005 01:12:12 GMT
Author: sebor
Date: Thu Nov 10 17:12:08 2005
New Revision: 332411

URL: http://svn.apache.org/viewcvs?rev=332411&view=rev
Log:
2005-11-10  Martin Sebor  <sebor@roguewave.com>

	STDCXX-65
	* limits: Used _RWSTD_NO_INT_TRAPS to define numeric_limits::traps
	for all integral T.
	* NO_INT_TRAPS.cpp: Used division by zero to trigger an arithmetic
	trap on platforms where integer trapping is implemented and enabled.

Modified:
    incubator/stdcxx/trunk/etc/config/src/NO_INT_TRAPS.cpp
    incubator/stdcxx/trunk/include/limits

Modified: incubator/stdcxx/trunk/etc/config/src/NO_INT_TRAPS.cpp
URL: http://svn.apache.org/viewcvs/incubator/stdcxx/trunk/etc/config/src/NO_INT_TRAPS.cpp?rev=332411&r1=332410&r2=332411&view=diff
==============================================================================
--- incubator/stdcxx/trunk/etc/config/src/NO_INT_TRAPS.cpp (original)
+++ incubator/stdcxx/trunk/etc/config/src/NO_INT_TRAPS.cpp Thu Nov 10 17:12:08 2005
@@ -4,27 +4,23 @@
 #  include "config.h"
 #endif   // _RWSTD_USE_CONFIG
 
-int int_get_zero ();
+int get_int ();
 
-int main ()
+int main (int argc, char*[])
 {
-    int int_zero = int_get_zero ();
-    int int_one  = int_get_zero () + 1;
-    int int_two  = int_get_zero () + 2;
+    int int_zero = get_int ();
+    int int_one  = get_int ();
 
-    int x = int_one;
-
-    while (int_zero < x)
-        x *= int_two;
+    int result = int_one / int_zero;
 
     // NEGATIVE test: successful exit status indicates a failure
-    return 0;
+    return argc < 2 ? 0 : result;
 }
 
 // foil optimizers
-int int_get_zero ()
-{
-    static int value = 0;
+volatile int int_value = 0;
 
-    return value;
+int get_int ()
+{
+    return int_value++;
 }

Modified: incubator/stdcxx/trunk/include/limits
URL: http://svn.apache.org/viewcvs/incubator/stdcxx/trunk/include/limits?rev=332411&r1=332410&r2=332411&view=diff
==============================================================================
--- incubator/stdcxx/trunk/include/limits (original)
+++ incubator/stdcxx/trunk/include/limits Thu Nov 10 17:12:08 2005
@@ -3,7 +3,7 @@
  *
  * <limits> - definitions of the numeric_limits template and specializations
  *
- * $Id: //stdlib/dev/include/limits#43 $
+ * $Id$
  *
  ***************************************************************************
  *
@@ -31,7 +31,14 @@
 #endif   // _RWSTD_NO_QUIET_NAN
 
 
-// do math operations (such as 0.0/0.0) trap?
+// does integer arithmetic trap?
+#ifndef _RWSTD_NO_INT_TRAPS
+#  define _RWSTD_INT_TRAPS true
+#else   // if defined (_RWSTD_NO_INT_TRAPS)
+#  define _RWSTD_INT_TRAPS false
+#endif   // _RWSTD_NO_INT_TRAPS
+
+// does floating point arithmetic (such as 0.0/0.0) trap?
 #ifndef _RWSTD_NO_DBL_TRAPS
 #  define _RWSTD_FLT_TRAPS  true
 #  define _RWSTD_DBL_TRAPS  true
@@ -221,7 +228,7 @@
     _RWSTD_STATIC (type, bool, is_bounded, true);                           \
     _RWSTD_STATIC (type, bool, is_modulo,  1 != cpfx##_MAX);                \
                                                                             \
-    _RWSTD_STATIC (type, bool, traps,           false);                     \
+    _RWSTD_STATIC (type, bool, traps,           _RWSTD_INT_TRAPS);          \
     _RWSTD_STATIC (type, bool, tinyness_before, false);                     \
     _RWSTD_STATIC (type, float_round_style, round_style, round_toward_zero);
 



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