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

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 41 matching lines @@
       V(TypeParameter)                                                         \
     V(Number)                                                                  \
       V(Integer)                                                               \
         V(Smi)                                                                 \
         V(Mint)                                                                \
         V(Bigint)                                                              \
       V(Double)                                                                \
     V(String)                                                                  \
       V(OneByteString)                                                         \
       V(TwoByteString)                                                         \
-      V(FourByteString)                                                        \
       V(ExternalOneByteString)                                                 \
       V(ExternalTwoByteString)                                                 \
-      V(ExternalFourByteString)                                                \
     V(Bool)                                                                    \
     V(Array)                                                                   \
       V(ImmutableArray)                                                        \
     V(GrowableObjectArray)                                                     \
     V(ByteArray)                                                               \
       V(Int8Array)                                                             \
       V(Uint8Array)                                                            \
       V(Int16Array)                                                            \
       V(Uint16Array)                                                           \
       V(Int32Array)                                                            \
@@ skipping 1042 matching lines @@
 class RawTwoByteString : public RawString {
   RAW_HEAP_OBJECT_IMPLEMENTATION(TwoByteString);
 
   // Variable length data follows here.
   uint16_t data_[0];
 
   friend class SnapshotReader;
 };
 
 
-class RawFourByteString : public RawString {
-  RAW_HEAP_OBJECT_IMPLEMENTATION(FourByteString);
-
-  // Variable length data follows here.
-  uint32_t data_[0];
-
-  friend class SnapshotReader;
-};
-
-
 template<typename T>
 class ExternalStringData {
  public:
   ExternalStringData(const T* data, void* peer, Dart_PeerFinalizer callback) :
       data_(data), peer_(peer), callback_(callback) {
   }
   ~ExternalStringData() {
     if (callback_ != NULL) (*callback_)(peer_);
   }
 
@@ skipping 20 matching lines @@
 
 
 class RawExternalTwoByteString : public RawString {
   RAW_HEAP_OBJECT_IMPLEMENTATION(ExternalTwoByteString);
 
   ExternalStringData<uint16_t>* external_data_;
   friend class Api;
 };
 
 
-class RawExternalFourByteString : public RawString {
-  RAW_HEAP_OBJECT_IMPLEMENTATION(ExternalFourByteString);
-
-  ExternalStringData<uint32_t>* external_data_;
-  friend class Api;
-};
-
-
 class RawBool : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Bool);
 
   bool value_;
 };
 
 
 class RawArray : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Array);
 
@@ skipping 270 matching lines @@
     return reinterpret_cast<RawObject**>(&ptr()->pattern_);
   }
 
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
+
 class RawWeakProperty : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(WeakProperty);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->key_);
   }
   RawObject* key_;
   RawObject* value_;
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->value_);
   }
 
   friend class GCMarker;
   friend class MarkingVisitor;
   friend class Scavenger;
   friend class ScavengerVisitor;
 };
 
+
 // Class Id predicates.
 
 inline bool RawObject::IsErrorClassId(intptr_t index) {
   // Make sure this function is updated when new Error types are added.
   ASSERT(kApiErrorCid == kErrorCid + 1 &&
          kLanguageErrorCid == kErrorCid + 2 &&
          kUnhandledExceptionCid == kErrorCid + 3 &&
          kUnwindErrorCid == kErrorCid + 4 &&
          kInstanceCid == kErrorCid + 5);
   return (index >= kErrorCid && index < kInstanceCid);
 }
 
+
 inline bool RawObject::IsNumberClassId(intptr_t index) {
   // Make sure this function is updated when new Number types are added.
   ASSERT(kIntegerCid == kNumberCid + 1 &&
          kSmiCid == kNumberCid + 2 &&
          kMintCid == kNumberCid + 3 &&
          kBigintCid == kNumberCid + 4 &&
          kDoubleCid == kNumberCid + 5 &&
          kStringCid == kNumberCid + 6);
   return (index >= kNumberCid && index < kStringCid);
 }
 
+
 inline bool RawObject::IsIntegerClassId(intptr_t index) {
   // Make sure this function is updated when new Integer types are added.
   ASSERT(kSmiCid == kIntegerCid + 1 &&
          kMintCid == kIntegerCid + 2 &&
          kBigintCid == kIntegerCid + 3 &&
          kDoubleCid == kIntegerCid + 4);
   return (index >= kIntegerCid && index < kDoubleCid);
 }
 
+
 inline bool RawObject::IsStringClassId(intptr_t index) {
   // Make sure this function is updated when new StringCid types are added.
   ASSERT(kOneByteStringCid == kStringCid + 1 &&
          kTwoByteStringCid == kStringCid + 2 &&
-         kFourByteStringCid == kStringCid + 3 &&
-         kExternalOneByteStringCid == kStringCid + 4 &&
-         kExternalTwoByteStringCid == kStringCid + 5 &&
-         kExternalFourByteStringCid == kStringCid + 6 &&
-         kBoolCid == kStringCid + 7);
+         kExternalOneByteStringCid == kStringCid + 3 &&
+         kExternalTwoByteStringCid == kStringCid + 4 &&
+         kBoolCid == kStringCid + 5);
   return (index >= kStringCid && index < kBoolCid);
 }
 
+
 inline bool RawObject::IsOneByteStringClassId(intptr_t index) {
   // Make sure this function is updated when new StringCid types are added.
   ASSERT(kOneByteStringCid == kStringCid + 1 &&
          kTwoByteStringCid == kStringCid + 2 &&
-         kFourByteStringCid == kStringCid + 3 &&
-         kExternalOneByteStringCid == kStringCid + 4 &&
-         kExternalTwoByteStringCid == kStringCid + 5 &&
-         kExternalFourByteStringCid == kStringCid + 6 &&
-         kBoolCid == kStringCid + 7);
+         kExternalOneByteStringCid == kStringCid + 3 &&
+         kExternalTwoByteStringCid == kStringCid + 4 &&
+         kBoolCid == kStringCid + 5);
   return (index == kOneByteStringCid || index == kExternalOneByteStringCid);
 }
 
+
 inline bool RawObject::IsTwoByteStringClassId(intptr_t index) {
   // Make sure this function is updated when new StringCid types are added.
   ASSERT(kOneByteStringCid == kStringCid + 1 &&
          kTwoByteStringCid == kStringCid + 2 &&
-         kFourByteStringCid == kStringCid + 3 &&
-         kExternalOneByteStringCid == kStringCid + 4 &&
-         kExternalTwoByteStringCid == kStringCid + 5 &&
-         kExternalFourByteStringCid == kStringCid + 6 &&
-         kBoolCid == kStringCid + 7);
+         kExternalOneByteStringCid == kStringCid + 3 &&
+         kExternalTwoByteStringCid == kStringCid + 4 &&
+         kBoolCid == kStringCid + 5);
   return (index == kOneByteStringCid ||
           index == kTwoByteStringCid ||
           index == kExternalOneByteStringCid ||
           index == kExternalTwoByteStringCid);
 }
 
+
 inline bool RawObject::IsExternalStringClassId(intptr_t index) {
   // Make sure this function is updated when new StringCid types are added.
   ASSERT(kOneByteStringCid == kStringCid + 1 &&
          kTwoByteStringCid == kStringCid + 2 &&
-         kFourByteStringCid == kStringCid + 3 &&
-         kExternalOneByteStringCid == kStringCid + 4 &&
-         kExternalTwoByteStringCid == kStringCid + 5 &&
-         kExternalFourByteStringCid == kStringCid + 6 &&
-         kBoolCid == kStringCid + 7);
+         kExternalOneByteStringCid == kStringCid + 3 &&
+         kExternalTwoByteStringCid == kStringCid + 4 &&
+         kBoolCid == kStringCid + 5);
   return (index == kExternalOneByteStringCid ||
-          index == kExternalTwoByteStringCid ||
-          index == kExternalFourByteStringCid);
+          index == kExternalTwoByteStringCid);
 }
 
+
 inline bool RawObject::IsBuiltinListClassId(intptr_t index) {
   // Make sure this function is updated when new builtin List types are added.
   ASSERT(kImmutableArrayCid == kArrayCid + 1 &&
          kGrowableObjectArrayCid == kArrayCid + 2 &&
          kByteArrayCid == kArrayCid + 3);
   return (index >= kArrayCid && index < kByteArrayCid) ||
       IsByteArrayClassId(index);
 }
 
+
 inline bool RawObject::IsByteArrayClassId(intptr_t index) {
   // Make sure this function is updated when new ByteArray types are added.
   ASSERT(kInt8ArrayCid == kByteArrayCid + 1 &&
          kUint8ArrayCid == kByteArrayCid + 2 &&
          kInt16ArrayCid == kByteArrayCid + 3 &&
          kUint16ArrayCid == kByteArrayCid + 4 &&
          kInt32ArrayCid == kByteArrayCid + 5 &&
          kUint32ArrayCid == kByteArrayCid + 6 &&
          kInt64ArrayCid == kByteArrayCid + 7 &&
          kUint64ArrayCid == kByteArrayCid + 8 &&
          kFloat32ArrayCid == kByteArrayCid + 9 &&
          kFloat64ArrayCid == kByteArrayCid + 10 &&
          kExternalInt8ArrayCid == kByteArrayCid + 11 &&
          kExternalUint8ArrayCid == kByteArrayCid + 12 &&
          kExternalInt16ArrayCid == kByteArrayCid + 13 &&
          kExternalUint16ArrayCid == kByteArrayCid + 14 &&
          kExternalInt32ArrayCid == kByteArrayCid + 15 &&
          kExternalUint32ArrayCid == kByteArrayCid + 16 &&
          kExternalInt64ArrayCid == kByteArrayCid + 17 &&
          kExternalUint64ArrayCid == kByteArrayCid + 18 &&
          kExternalFloat32ArrayCid == kByteArrayCid + 19 &&
          kExternalFloat64ArrayCid == kByteArrayCid + 20 &&
          kStacktraceCid == kByteArrayCid + 21);
   return (index >= kByteArrayCid && index <= kExternalFloat64ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_