Implement parseFloat()

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai.u-szeged@partner.samsung.com

tests/jerry/global-parsefloat.js

@@ -0,0 +1,67 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// 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(parseFloat("1") === 1);
+assert(parseFloat("+1") === 1);
+assert(parseFloat("-1") === -1);
+assert(parseFloat("1.2") === 1.2);
+assert(parseFloat("+1.2") === 1.2);
+assert(parseFloat("-1.2") === -1.2);
+assert(parseFloat("1.2e3") === 1200);
+assert(parseFloat("+1.2e3") === 1200);
+assert(parseFloat("-1.2e3") === -1200);
+assert(parseFloat("   \n\t  1.2e3") === 1200);
+assert(parseFloat(".2e3") === 200);
+assert(parseFloat("1.e3") === 1000);
+assert(parseFloat("1.2e") === 1.2);
+assert(parseFloat("1.e") === 1);
+assert(parseFloat("1.e3") === 1000);
+assert(parseFloat("1e3") === 1000);
+assert(parseFloat("1e") === 1);
+assert(parseFloat("1.2e3foo") === 1200);
+assert(isNaN(parseFloat("foo1.2e3foo")));
+assert(parseFloat("Infinity") === Infinity);
+assert(parseFloat("-Infinity") === -Infinity);
+assert(parseFloat("Infinityfoo") === Infinity);
+assert(parseFloat("-Infinityfoo") === -Infinity);
+assert(isNaN(parseFloat("")));
+assert(isNaN(parseFloat(".")));
+assert(isNaN(parseFloat("e3")));
+assert(isNaN(parseFloat(".e3")));
+assert(parseFloat("0") === 0);
+assert(parseFloat(".0") === 0);
+assert(parseFloat("0.e3") === 0);
+assert(parseFloat("0.0e3") === 0);
+
+var obj = new Object();
+var arr = [3,4,5];
+var num = 7;
+var bool = true;
+var undef;
+
+assert(isNaN(parseFloat(obj)));
+assert(parseFloat(arr) === 3);
+assert(parseFloat(num) === 7);
+assert(isNaN(parseFloat(bool)));
+assert(isNaN(parseFloat(undef)));
+
+var obj = { toString : function () { throw new ReferenceError("foo") } };
+try {
+	parseFloat(obj);
+	assert(false);
+} catch (e) {
+	assert(e instanceof ReferenceError);
+	assert(e.message === "foo");
+}