- Represent strings internally in UTF-16 format, this makes it

runtime/vm/raw_object_snapshot.cc

 // Copyright (c) 2012, 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/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/symbols.h"
 #include "vm/visitor.h"
@@ skipping 1697 matching lines @@
     }
     ASSERT(String::Hash(str_obj, 0, str_obj.Length()) == hash);
   } else {
     ReadFromImpl<TwoByteString, uint16_t>(reader, &str_obj, len, tags, kind);
   }
   reader->AddBackRef(object_id, &str_obj, kIsDeserialized);
   return str_obj.raw();
 }
 
 
-RawFourByteString* FourByteString::ReadFrom(SnapshotReader* reader,
-                                            intptr_t object_id,
-                                            intptr_t tags,
-                                            Snapshot::Kind kind) {
-  // Read the length so that we can determine instance size to allocate.
-  ASSERT(reader != NULL);
-  intptr_t len = reader->ReadSmiValue();
-  intptr_t hash = reader->ReadSmiValue();
-  FourByteString& str_obj = FourByteString::ZoneHandle(reader->isolate(),
-                                                       FourByteString::null());
-
-  if (kind == Snapshot::kFull) {
-    RawFourByteString* obj = reader->NewFourByteString(len);
-    str_obj = obj;
-    str_obj.set_tags(tags);
-    obj->ptr()->hash_ = Smi::New(hash);
-    uint32_t* raw_ptr = (len > 0)? str_obj.CharAddr(0) : NULL;
-    for (intptr_t i = 0; i < len; i++) {
-      ASSERT(str_obj.CharAddr(i) == raw_ptr);  // Will trigger assertions.
-      *raw_ptr = reader->Read<uint32_t>();
-      raw_ptr += 1;
-    }
-    ASSERT(String::Hash(str_obj, 0, str_obj.Length()) == hash);
-  } else {
-    ReadFromImpl<FourByteString, uint32_t>(reader, &str_obj, len, tags, kind);
-  }
-  reader->AddBackRef(object_id, &str_obj, kIsDeserialized);
-  return str_obj.raw();
-}
-
-
 template<typename T>
 static void StringWriteTo(SnapshotWriter* writer,
                           intptr_t object_id,
                           Snapshot::Kind kind,
                           intptr_t class_id,
                           intptr_t tags,
                           RawSmi* length,
                           RawSmi* hash,
                           T* data) {
   ASSERT(writer != NULL);
@@ skipping 46 matching lines @@
                 object_id,
                 kind,
                 kTwoByteStringCid,
                 writer->GetObjectTags(this),
                 ptr()->length_,
                 ptr()->hash_,
                 ptr()->data_);
 }
 
 
-void RawFourByteString::WriteTo(SnapshotWriter* writer,
-                                intptr_t object_id,
-                                Snapshot::Kind kind) {
-  StringWriteTo(writer,
-                object_id,
-                kind,
-                kFourByteStringCid,
-                writer->GetObjectTags(this),
-                ptr()->length_,
-                ptr()->hash_,
-                ptr()->data_);
-}
-
-
 RawExternalOneByteString* ExternalOneByteString::ReadFrom(
     SnapshotReader* reader,
     intptr_t object_id,
     intptr_t tags,
     Snapshot::Kind kind) {
   UNREACHABLE();
   return ExternalOneByteString::null();
 }
 
 
 RawExternalTwoByteString* ExternalTwoByteString::ReadFrom(
     SnapshotReader* reader,
     intptr_t object_id,
     intptr_t tags,
     Snapshot::Kind kind) {
   UNREACHABLE();
   return ExternalTwoByteString::null();
 }
 
 
-RawExternalFourByteString* ExternalFourByteString::ReadFrom(
-    SnapshotReader* reader,
-    intptr_t object_id,
-    intptr_t tags,
-    Snapshot::Kind kind) {
-  UNREACHABLE();
-  return ExternalFourByteString::null();
-}
-
-
 void RawExternalOneByteString::WriteTo(SnapshotWriter* writer,
                                        intptr_t object_id,
                                        Snapshot::Kind kind) {
   // Serialize as a non-external one byte string.
   StringWriteTo(writer,
                 object_id,
                 kind,
                 kOneByteStringCid,
                 writer->GetObjectTags(this),
                 ptr()->length_,
@@ skipping 10 matching lines @@
                 object_id,
                 kind,
                 kTwoByteStringCid,
                 writer->GetObjectTags(this),
                 ptr()->length_,
                 ptr()->hash_,
                 ptr()->external_data_->data());
 }
 
 
-void RawExternalFourByteString::WriteTo(SnapshotWriter* writer,
-                                        intptr_t object_id,
-                                        Snapshot::Kind kind) {
-  // Serialize as a non-external four byte string.
-  StringWriteTo(writer,
-                object_id,
-                kind,
-                kFourByteStringCid,
-                writer->GetObjectTags(this),
-                ptr()->length_,
-                ptr()->hash_,
-                ptr()->external_data_->data());
-}
-
-
 RawBool* Bool::ReadFrom(SnapshotReader* reader,
                         intptr_t object_id,
                         intptr_t tags,
                         Snapshot::Kind kind) {
   UNREACHABLE();
   return Bool::null();
 }
 
 
 void RawBool::WriteTo(SnapshotWriter* writer,
@@ skipping 393 matching lines @@
   // Write out the class and tags information.
   writer->WriteIndexedObject(kWeakPropertyCid);
   writer->WriteIntptrValue(writer->GetObjectTags(this));
 
   // Write out all the other fields.
   writer->Write<RawObject*>(ptr()->key_);
   writer->Write<RawObject*>(ptr()->value_);
 }
 
 }  // namespace dart