StringToDouble rewritten not using String::Get and memory allocations....

test/mjsunit/str-to-num.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 11 matching lines @@
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 function toNumber(val) {
   return Number(val);
 }
 
+function repeat(s, num) {
+  var result = '';
+  while (num > 0) {
+    if ((num & 1) != 0) result += s;
+    s += s;
+    num >>= 1;
+  }
+
+  return result;
+}
+
+assertEquals('0000000000', repeat('0', 10));
+
 // assertEquals(, toNumber());
 
 
 assertEquals(123, toNumber(" 123"));
 assertEquals(123, toNumber("\n123"));
 assertEquals(123, toNumber("\r123"));
 assertEquals(123, toNumber("\t123"));
 assertEquals(123, toNumber("\f123"));
 
 assertEquals(123, toNumber("123 "));
@@ skipping 12 matching lines @@
 assertEquals(Infinity,  toNumber(" Infinity ") ," Infinity");
 assertEquals(-Infinity, toNumber(" -Infinity "));
 assertEquals(Infinity,  toNumber(" +Infinity "), " +Infinity");
 assertEquals(Infinity,  toNumber("Infinity ") ,"Infinity");
 assertEquals(-Infinity, toNumber("-Infinity "));
 assertEquals(Infinity,  toNumber("+Infinity "), "+Infinity");
 
 assertEquals(0,  toNumber("0"));
 assertEquals(0,  toNumber("+0"));
 assertEquals(-0, toNumber("-0"));
+assertEquals(-Infinity, 1 / toNumber("-0"));
 
 assertEquals(1,  toNumber("1"));
 assertEquals(1,  toNumber("+1"));
 assertEquals(-1, toNumber("-1"));
 
 assertEquals(2,  toNumber("2"));
 assertEquals(2,  toNumber("+2"));
 assertEquals(-2, toNumber("-2"));
 
 assertEquals(3.1415926,  toNumber("3.1415926"));
@@ skipping 49 matching lines @@
 assertEquals(15, toNumber("0xF"));
 
 assertEquals(0,  toNumber("0X0"));
 assertEquals(9,  toNumber("0X9"));
 assertEquals(10, toNumber("0Xa"));
 assertEquals(10, toNumber("0XA"));
 assertEquals(15, toNumber("0Xf"));
 assertEquals(15, toNumber("0XF"));
 
 assertEquals(0,  toNumber("0x000"));
+assertEquals(-Infinity,  1 / toNumber("-0x000"));
+assertEquals(0,  toNumber("0x000" + repeat('0', 1000)));
 assertEquals(9,  toNumber("0x009"));
 assertEquals(10, toNumber("0x00a"));
 assertEquals(10, toNumber("0x00A"));
 assertEquals(15, toNumber("0x00f"));
 assertEquals(15, toNumber("0x00F"));
+assertEquals(Infinity,  toNumber("0x" + repeat('0', 1000) + '1'
+                        + repeat('0', 1000)));
+assertEquals(-Infinity,  toNumber("-0x1" + repeat('0', 1000)));
 
 assertEquals(0, toNumber("00"));
 assertEquals(1, toNumber("01"));
 assertEquals(2, toNumber("02"));
 assertEquals(10, toNumber("010"));
 assertEquals(100, toNumber("0100"));
 assertEquals(100, toNumber("000100"));
 
 assertEquals(Infinity,  toNumber("1e999"), "1e999");
 assertEquals(-Infinity, toNumber("-1e999"));
 assertEquals(0,         toNumber("1e-999"));
 assertEquals(0,         toNumber("-1e-999"));
 assertEquals(Infinity,  1 / toNumber("1e-999"), "1e-999");
 assertEquals(-Infinity, 1 / toNumber("-1e-999"));
 
 assertTrue(isNaN(toNumber("junk")), "junk");
 assertTrue(isNaN(toNumber("100 junk")), "100 junk");
 assertTrue(isNaN(toNumber("0x100 junk")), "0x100 junk");
 assertTrue(isNaN(toNumber("100.0 junk")), "100.0 junk");
 assertTrue(isNaN(toNumber(".1e4 junk")), ".1e4 junk");
 assertTrue(isNaN(toNumber("Infinity junk")), "Infinity junk");
+assertTrue(isNaN(toNumber("1e")), "1e");
+assertTrue(isNaN(toNumber("1e ")), "1e_");
+assertTrue(isNaN(toNumber("1" + repeat('0', 1000) + 'junk')), "1e1000 junk");