String equality improvements.

src/objects-inl.h

 // Copyright 2006-2008 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 107 matching lines @@
     && (String::cast(this)->representation_tag() == kSeqStringTag);
 }
 
 
 bool Object::IsSeqAsciiString() {
   return IsSeqString()
       && String::cast(this)->IsAsciiRepresentation();
 }
 
 
+bool String::IsSeqAsciiString() {
+  return (this->representation_tag() == kSeqStringTag)
+    && is_ascii_representation();
+}
+
+
 bool Object::IsSeqTwoByteString() {
   return IsSeqString()
       && !String::cast(this)->IsAsciiRepresentation();
 }
 
 
 bool Object::IsAsciiStringRepresentation() {
   return IsString() && (String::cast(this)->is_ascii_representation());
 }
 
@@ skipping 1263 matching lines @@
   WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize,
                    static_cast<byte>(value));
 }
 
 
 Address SeqAsciiString::GetCharsAddress() {
   return FIELD_ADDR(this, kHeaderSize);
 }
 
 
+const char* SeqAsciiString::GetChars() {
+  return reinterpret_cast<const char*>(GetCharsAddress());
+}
+
+
 Address SeqTwoByteString::GetCharsAddress() {
   return FIELD_ADDR(this, kHeaderSize);
 }
 
 
 uint16_t SeqTwoByteString::SeqTwoByteStringGet(int index) {
   ASSERT(index >= 0 && index < length());
   return READ_SHORT_FIELD(this, kHeaderSize + index * kShortSize);
 }
 
@@ skipping 896 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_