Use locale insensitive method to parse double literals.

runtime/vm/double_conversion.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/double_conversion.h"
 
 #include "third_party/double-conversion/src/double-conversion.h"
 
 #include "vm/exceptions.h"
 #include "vm/globals.h"
@@ skipping 148 matching lines @@
       kMaxTrailingPaddingZeroes);
 
   char* buffer = Isolate::Current()->current_zone()->Alloc<char>(kBufferSize);
   buffer[kBufferSize - 1] = '\0';
   double_conversion::StringBuilder builder(buffer, kBufferSize);
   bool status = converter.ToPrecision(d, precision, &builder);
   ASSERT(status);
   return String::New(builder.Finalize());
 }
 
+
+bool CStringToDouble(const char* str, intptr_t length, double* result) {
+  if (length == 0) {
+    return false;
+  }
+
+  double_conversion::StringToDoubleConverter converter(
+    double_conversion::StringToDoubleConverter::NO_FLAGS,
+    0.0,
+    0.0,
+    kDoubleToStringCommonInfinitySymbol,
+    kDoubleToStringCommonNaNSymbol);
+
+  int parsed_count = 0;
+  *result = converter.StringToDouble(str,
+                                     static_cast<int>(length),
+                                     &parsed_count);
+  return (parsed_count == length);
+}
+
+
 }  // namespace dart