fix #108

AFAICT NANs occupy a bit space of more than 1.787e19 possible values

Author: m6w6

tests/041.phpt

@@ -2,46 +2,60 @@
 Check for double NaN, Inf, -Inf, 0, and -0
 --FILE--
 <?php
-function test($type, $variable) {
+function test($type, $variable, $check) {
     $serialized = msgpack_serialize($variable);
     $unserialized = msgpack_unserialize($serialized);
 
     echo $type, PHP_EOL;
     var_dump($variable);
     var_dump($unserialized);
+    var_dump($check($unserialized));
 
-    echo bin2hex($serialized), PHP_EOL;
     echo PHP_EOL;
 }
 
-test('double NaN:', NAN);
-test('double Inf:', INF);
-test('double -Inf:', -INF);
-test('double 0.0:', 0.0);
-test('double -0.0:', -0.0);
+test('double NaN:', NAN, "is_nan");
+test('double Inf:', INF, "is_infinite");
+test('double -Inf:', -INF, "is_infinite");
+test('double 0.0:', 0.0, function($z) {
+        $h = bin2hex(pack("E", $z));
+        if ($h === "0000000000000000") {
+            return true;
+        }
+        var_dump($h);
+    }
+);
+test('double -0.0:', -0.0, function($z) {
+        $h = bin2hex(pack("E", $z));
+        if ($h === "8000000000000000") {
+            return true;
+        }
+        var_dump($h);
+    }
+);
 
 --EXPECTF--
 double NaN:
 float(NAN)
 float(NAN)
-cb7ff8000000000000
+bool(true)
 
 double Inf:
 float(INF)
 float(INF)
-cb7ff0000000000000
+bool(true)
 
 double -Inf:
 float(-INF)
 float(-INF)
-cbfff0000000000000
+bool(true)
 
 double 0.0:
 float(0)
 float(0)
-cb0000000000000000
+bool(true)
 
 double -0.0:
 float(-0)
 float(-0)
-cb8000000000000000
+bool(true)