Implement String.prototype.search, and some minor regexp refactors.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg@inf.u-szeged.hu

tests/jerry/string-prototype-search.js

@@ -0,0 +1,60 @@
+// Copyright 2015 University of Szeged
+// Copyright 2015 Samsung Electronics Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+assert ("abcabbcd".search (/abb+c/) === 3);
+assert ("ababbccabd".search ("((?:(ax))|(bx)|ab*c+)") === 2);
+assert ("acbaabcabcabc".search (/b+c/g) === 5);
+assert ("abcabd".search ("c?a+d") === -1);
+
+assert (String.prototype.search.call ({}, "ec+t") === 4);
+
+try
+{
+  String.prototype.search.call (null, "u");
+  assert (false);
+}
+catch (e)
+{
+  assert (e instanceof TypeError);
+}
+
+var regexp = /x/g;
+regexp.lastIndex = "index";
+
+assert ("aaxbb".search (regexp) === 2);
+assert ("aabb".search (regexp) === -1);
+assert (regexp.lastIndex === "index");
+
+Object.defineProperty(regexp, "lastIndex", {
+  configurable : false,
+  enumerable : false,
+  value : "index2",
+  writable : false
+});
+
+assert ("axb".search (regexp) === 1);
+assert ("aabb".search (regexp) === -1);
+assert (regexp.lastIndex === "index2");
+
+assert ("##\ud801\udc00".search ("\ud801") === 2);
+assert ("##\ud801\udc00".search ("\udc00") === 3);
+
+// The real "exec" never returns with a number.
+Object.getPrototypeOf(/x/).exec = function () { return "???"; }
+
+assert (/y/.exec("y") === "???");
+
+// Changing exec should not affect search.
+assert ("ay".search (/y/) === 1);