Move most scanner buffer accesses into scanner.

src/preparser.h

 // Copyright 2012 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 1096 matching lines @@
 }
 
 
 template <class Traits>
 typename Traits::Type::Identifier
 ParserBase<Traits>::ParseIdentifierNameOrGetOrSet(bool* is_get,
                                                   bool* is_set,
                                                   bool* ok) {
   typename Traits::Type::Identifier result = ParseIdentifierName(ok);
   if (!*ok) return Traits::EmptyIdentifier();
-  if (scanner()->is_literal_ascii() &&
-      scanner()->literal_length() == 3) {
-    const char* token = scanner()->literal_ascii_string().start();
-    *is_get = strncmp(token, "get", 3) == 0;
-    *is_set = !*is_get && strncmp(token, "set", 3) == 0;
-  }
+  scanner()->IsGetOrSet(is_get, is_set);
   return result;
 }
 
 
 template <class Traits>
 typename Traits::Type::Expression
 ParserBase<Traits>::ParseRegExpLiteral(bool seen_equal, bool* ok) {
   int pos = peek_position();
   if (!scanner()->ScanRegExpPattern(seen_equal)) {
     Next();
@@ skipping 377 matching lines @@
 #undef CHECK_OK_CUSTOM
 
 
 template <typename Traits>
 void ParserBase<Traits>::ObjectLiteralChecker::CheckProperty(
     Token::Value property,
     PropertyKind type,
     bool* ok) {
   int old;
   if (property == Token::NUMBER) {
-    old = finder_.AddNumber(scanner()->literal_ascii_string(), type);
-  } else if (scanner()->is_literal_ascii()) {
-    old = finder_.AddAsciiSymbol(scanner()->literal_ascii_string(), type);
+    old = finder_.AddNumber(scanner()->literal_one_byte_string(), type);
+  } else if (scanner()->is_literal_one_byte()) {
+    old = finder_.AddAsciiSymbol(scanner()->literal_one_byte_string(), type);
   } else {
     old = finder_.AddUtf16Symbol(scanner()->literal_utf16_string(), type);
   }
   PropertyKind old_type = static_cast<PropertyKind>(old);
   if (HasConflict(old_type, type)) {
     if (IsDataDataConflict(old_type, type)) {
       // Both are data properties.
       if (strict_mode_ == SLOPPY) return;
       parser()->ReportMessageAt(scanner()->location(),
                                "strict_duplicate_property");
     } else if (IsDataAccessorConflict(old_type, type)) {
       // Both a data and an accessor property with the same name.
       parser()->ReportMessageAt(scanner()->location(),
                                "accessor_data_property");
     } else {
       ASSERT(IsAccessorAccessorConflict(old_type, type));
       // Both accessors of the same type.
       parser()->ReportMessageAt(scanner()->location(),
                                "accessor_get_set");
     }
     *ok = false;
   }
 }
 
 
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H