Create stand-alone json parser (including scanner).

src/heap.cc

 // 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
@@ skipping 4152 matching lines @@
     if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
   }
   // Can't use set_symbol_table because SymbolTable::cast knows that
   // SymbolTable is a singleton and checks for identity.
   roots_[kSymbolTableRootIndex] = new_table;
   ASSERT(symbol != NULL);
   return symbol;
 }
 
 
+MaybeObject* Heap::LookupAsciiSymbol(Handle<SeqAsciiString> string,
+                                     int from,
+                                     int length) {
+  Object* symbol = NULL;
+  Object* new_table;
+  { MaybeObject* maybe_new_table =
+        symbol_table()->LookupSubStringAsciiSymbol(string,
+                                                   from,
+                                                   length,
+                                                   &symbol);
+    if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
+  }
+  // Can't use set_symbol_table because SymbolTable::cast knows that
+  // SymbolTable is a singleton and checks for identity.
+  roots_[kSymbolTableRootIndex] = new_table;
+  ASSERT(symbol != NULL);
+  return symbol;
+}
+
+
 MaybeObject* Heap::LookupTwoByteSymbol(Vector<const uc16> string) {
   Object* symbol = NULL;
   Object* new_table;
   { MaybeObject* maybe_new_table =
         symbol_table()->LookupTwoByteSymbol(string, &symbol);
     if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
   }
   // Can't use set_symbol_table because SymbolTable::cast knows that
   // SymbolTable is a singleton and checks for identity.
   roots_[kSymbolTableRootIndex] = new_table;
@@ skipping 1700 matching lines @@
 }
 
 
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 } }  // namespace v8::internal