Add support for surrogates when serializing and deserializing for native ports

runtime/vm/unicode.h

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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_UNICODE_H_
 #define VM_UNICODE_H_
 
 #include "vm/allocation.h"
 #include "vm/globals.h"
 
 namespace dart {
@@ skipping 13 matching lines @@
   static const intptr_t kMaxThreeByteChar = 0xFFFF;
   static const intptr_t kMaxFourByteChar  = 0x10FFFF;
 
   static intptr_t CodePointCount(const uint8_t* utf8_array,
                                  intptr_t array_len,
                                  Type* type);
 
   // Returns true if 'utf8_array' is a valid UTF-8 string.
   static bool IsValid(const uint8_t* utf8_array, intptr_t array_len);
 
+  // Returns true if 'utf8_array' is a valid UTF-8 string allowing
+  // UTF-8 encoded UTF-16 surrogate code units.
+  static bool IsValidAllowSurrogates(
+      const uint8_t* utf8_array, intptr_t array_len);
+
   static intptr_t Length(int32_t ch);
   static intptr_t Length(const String& str);
 
   static intptr_t Encode(int32_t ch, char* dst);
   static intptr_t Encode(const String& src, char* dst, intptr_t len);
 
   static intptr_t Decode(const uint8_t* utf8_array,
                          intptr_t array_len,
                          int32_t* ch);
+  static intptr_t DecodeAllowSurrogates(const uint8_t* utf8_array,
+                                        intptr_t array_len,
+                                        int32_t* ch);
 
   static bool DecodeToLatin1(const uint8_t* utf8_array,
                              intptr_t array_len,
                              uint8_t* dst,
                              intptr_t len);
   static bool DecodeToUTF16(const uint8_t* utf8_array,
                             intptr_t array_len,
                             uint16_t* dst,
                             intptr_t len);
+  static bool DecodeToUTF16AllowSurrogates(const uint8_t* utf8_array,
+                                           intptr_t array_len,
+                                           uint16_t* dst,
+                                           intptr_t len);
   static bool DecodeToUTF32(const uint8_t* utf8_array,
                             intptr_t array_len,
                             int32_t* dst,
                             intptr_t len);
   static bool DecodeCStringToUTF32(const char* str,
                                    int32_t* dst,
                                    intptr_t len) {
     ASSERT(str != NULL);
     intptr_t array_len = strlen(str);
     const uint8_t* utf8_array = reinterpret_cast<const uint8_t*>(str);
@@ skipping 99 matching lines @@
   // Data for small code points with one mapping
   static const int16_t stage2_[];
 
   // Data for large code points or code points with both mappings.
   static const int32_t stage2_exception_[][2];
 };
 
 }  // namespace dart
 
 #endif  // VM_UNICODE_H_