PHPC-1411: Emit warning when truncating 64-bit value

Author: alcaeus

src/MongoDB/WriteConcern.c

@@ -269,14 +269,23 @@ static PHP_METHOD(WriteConcern, getW)
 static PHP_METHOD(WriteConcern, getWtimeout)
 {
 	php_phongo_writeconcern_t* intern;
+	int64_t                    wtimeout;
 
 	intern = Z_WRITECONCERN_OBJ_P(getThis());
 
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
 	}
 
-	RETURN_LONG(mongoc_write_concern_get_wtimeout_int64(intern->write_concern));
+	wtimeout = mongoc_write_concern_get_wtimeout_int64(intern->write_concern);
+
+#if SIZEOF_LONG == 4
+	if (wtimeout > INT32_MAX || wtimeout < INT32_MIN) {
+		zend_error(E_WARNING, "Truncating 64-bit value for wTimeoutMS");
+	}
+#endif
+
+	RETURN_LONG(wtimeout);
 } /* }}} */
 
 /* {{{ proto null|boolean MongoDB\Driver\WriteConcern::getJournal()

tests/writeConcern/writeconcern-getwtimeout-002.phpt

@@ -0,0 +1,22 @@
+--TEST--
+MongoDB\Driver\WriteConcern::getWtimeout() emits warning on truncation of 64-bit value
+--SKIPIF--
+<?php if (4 !== PHP_INT_SIZE) { die('skip Only for 32-bit platform'); } ?>
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/tools.php';
+
+$manager = new MongoDB\Driver\Manager('mongodb://127.0.0.1/?w=2&wtimeoutms=4294967296');
+
+echo raises(function() use ($manager) {
+    var_dump($manager->getWriteConcern()->getWtimeout());
+}, E_WARNING), "\n";
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got E_WARNING
+Truncating 64-bit value for wTimeoutMS
+===DONE===