Don't allow whitespace after sign characters in parseInt.

BUG=v8:955
TEST=mjsunit/regress/regress-955

Review URL: http://codereview.chromium.org/6903171

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7755 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/conversions.cc

@@ -254,12 +254,12 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
   if (*current == '+') {
     // Ignore leading sign; skip following spaces.
     ++current;
-    if (!AdvanceToNonspace(unicode_cache, &current, end)) {
+    if (current == end) {
       return JUNK_STRING_VALUE;
     }
   } else if (*current == '-') {
     ++current;
-    if (!AdvanceToNonspace(unicode_cache, &current, end)) {
+    if (current == end) {
       return JUNK_STRING_VALUE;
     }
     negative = true;

test/mjsunit/regress/regress-955.js

+// Copyright 2011 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// 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.
+
+// See: http://code.google.com/p/v8/issues/detail?id=955
+
+// Correctly parse signed numbers.
+assertEquals(-0, parseInt("-0"));
+assertEquals(0, parseInt("+0"));
+
+// Don't allow whitespace after signs in parseInt.
+assertEquals(NaN, parseInt("- 0"));
+assertEquals(NaN, parseInt("+ 0"));
+assertEquals(NaN, parseInt("-\t0"));
+assertEquals(NaN, parseInt("+\t0"));
+
+// Do allow whitespace at start.
+assertEquals(-0, parseInt(" -0"));
+assertEquals(0, parseInt(" +0"));
+assertEquals(-0, parseInt("\t-0"));
+assertEquals(0, parseInt("\t+0"));