Add support for big integers to the native message format

runtime/vm/dart_api_message.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/dart_api_message.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 
 namespace dart {
 
@@ skipping 70 matching lines @@
 }
 
 
 Dart_CObject* ApiMessageReader::AllocateDartCObjectInt64(int64_t val) {
   Dart_CObject* value = AllocateDartCObject(Dart_CObject::kInt64);
   value->value.as_int64 = val;
   return value;
 }
 
 
+Dart_CObject* ApiMessageReader::AllocateDartCObjectBigint(intptr_t length) {
+  // Allocate a Dart_CObject structure followed by an array of chars
+  // for the bigint hex string content. The pointer to the bigint
+  // content is set up to this area.
+  Dart_CObject* value =
+      reinterpret_cast<Dart_CObject*>(
+          alloc_(NULL, 0, sizeof(Dart_CObject) + length + 1));
+  value->value.as_bigint = reinterpret_cast<char*>(value) + sizeof(*value);
+  value->type = Dart_CObject::kBigint;
+  return value;
+}
+
+
 Dart_CObject* ApiMessageReader::AllocateDartCObjectDouble(double val) {
   Dart_CObject* value = AllocateDartCObject(Dart_CObject::kDouble);
   value->value.as_double = val;
   return value;
 }
 
 
 Dart_CObject* ApiMessageReader::AllocateDartCObjectString(intptr_t length) {
   // Allocate a Dart_CObject structure followed by an array of chars
   // for the string content. The pointer to the string content is set
@@ skipping 98 matching lines @@
     }
     case ObjectStore::kMintClass: {
       int64_t value = Read<int64_t>();
       if (kMinInt32 <= value && value <= kMaxInt32) {
         return AllocateDartCObjectInt32(value);
       } else {
         return AllocateDartCObjectInt64(value);
       }
       break;
     }
+    case ObjectStore::kBigintClass: {
+      // Read in the hex string representation of the bigint.
+      intptr_t len = ReadIntptrValue();
+      Dart_CObject* object = AllocateDartCObjectBigint(len);
+      char* p = object->value.as_bigint;
+      for (intptr_t i = 0; i < len; i++) {
+        p[i] = Read<uint8_t>();
+      }
+      p[len] = '\0';
+      return object;
+      break;
+    }
     case ObjectStore::kDoubleClass: {
       // Read the double value for the object.
       Dart_CObject* object = AllocateDartCObjectDouble(Read<double>());
       AddBackwardReference(object_id, object);
       return object;
       break;
     }
     case ObjectStore::kOneByteStringClass: {
       intptr_t len = ReadSmiValue();
       intptr_t hash = ReadSmiValue();
@@ skipping 83 matching lines @@
   return ReadObjectImpl(value);
 }
 
 
 void ApiMessageReader::AddBackwardReference(intptr_t id, Dart_CObject* obj) {
   ASSERT((id - kMaxPredefinedObjectIds) == backward_references_.length());
   backward_references_.Add(obj);
 }
 
 }  // namespace dart