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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ipc/ipc_message_utils.h"
#include "base/json/json_writer.h"
#include "base/scoped_ptr.h"
#include "base/time.h"
#include "base/values.h"
namespace IPC {
const int kMaxRecursionDepth = 100;
// Value serialization
static bool ReadValue(const Message* m, void** iter, Value** value,
int recursion);
static void WriteValue(Message* m, const Value* value, int recursion) {
if (recursion > kMaxRecursionDepth) {
LOG(WARNING) << "Max recursion depth hit in WriteValue.";
return;
}
m->WriteInt(value->GetType());
switch (value->GetType()) {
case Value::TYPE_NULL:
break;
case Value::TYPE_BOOLEAN: {
bool val;
value->GetAsBoolean(&val);
WriteParam(m, val);
break;
}
case Value::TYPE_INTEGER: {
int val;
value->GetAsInteger(&val);
WriteParam(m, val);
break;
}
case Value::TYPE_REAL: {
double val;
value->GetAsReal(&val);
WriteParam(m, val);
break;
}
case Value::TYPE_STRING: {
std::string val;
value->GetAsString(&val);
WriteParam(m, val);
break;
}
case Value::TYPE_BINARY: {
const BinaryValue* binary = static_cast<const BinaryValue*>(value);
m->WriteData(binary->GetBuffer(), static_cast<int>(binary->GetSize()));
break;
}
case Value::TYPE_DICTIONARY: {
const DictionaryValue* dict = static_cast<const DictionaryValue*>(value);
WriteParam(m, static_cast<int>(dict->size()));
for (DictionaryValue::key_iterator it = dict->begin_keys();
it != dict->end_keys(); ++it) {
Value* subval;
if (dict->GetWithoutPathExpansion(*it, &subval)) {
WriteParam(m, *it);
WriteValue(m, subval, recursion + 1);
} else {
NOTREACHED() << "DictionaryValue iterators are filthy liars.";
}
}
break;
}
case Value::TYPE_LIST: {
const ListValue* list = static_cast<const ListValue*>(value);
WriteParam(m, static_cast<int>(list->GetSize()));
for (size_t i = 0; i < list->GetSize(); ++i) {
Value* subval;
if (list->Get(i, &subval)) {
WriteValue(m, subval, recursion + 1);
} else {
NOTREACHED() << "ListValue::GetSize is a filthy liar.";
}
}
break;
}
}
}
// Helper for ReadValue that reads a DictionaryValue into a pre-allocated
// object.
static bool ReadDictionaryValue(const Message* m, void** iter,
DictionaryValue* value, int recursion) {
int size;
if (!ReadParam(m, iter, &size))
return false;
for (int i = 0; i < size; ++i) {
std::string key;
Value* subval;
if (!ReadParam(m, iter, &key) ||
!ReadValue(m, iter, &subval, recursion + 1))
return false;
value->Set(key, subval);
}
return true;
}
// Helper for ReadValue that reads a ReadListValue into a pre-allocated
// object.
static bool ReadListValue(const Message* m, void** iter,
ListValue* value, int recursion) {
int size;
if (!ReadParam(m, iter, &size))
return false;
for (int i = 0; i < size; ++i) {
Value* subval;
if (!ReadValue(m, iter, &subval, recursion + 1))
return false;
value->Set(i, subval);
}
return true;
}
static bool ReadValue(const Message* m, void** iter, Value** value,
int recursion) {
if (recursion > kMaxRecursionDepth) {
LOG(WARNING) << "Max recursion depth hit in ReadValue.";
return false;
}
int type;
if (!ReadParam(m, iter, &type))
return false;
switch (type) {
case Value::TYPE_NULL:
*value = Value::CreateNullValue();
break;
case Value::TYPE_BOOLEAN: {
bool val;
if (!ReadParam(m, iter, &val))
return false;
*value = Value::CreateBooleanValue(val);
break;
}
case Value::TYPE_INTEGER: {
int val;
if (!ReadParam(m, iter, &val))
return false;
*value = Value::CreateIntegerValue(val);
break;
}
case Value::TYPE_REAL: {
double val;
if (!ReadParam(m, iter, &val))
return false;
*value = Value::CreateRealValue(val);
break;
}
case Value::TYPE_STRING: {
std::string val;
if (!ReadParam(m, iter, &val))
return false;
*value = Value::CreateStringValue(val);
break;
}
case Value::TYPE_BINARY: {
const char* data;
int length;
if (!m->ReadData(iter, &data, &length))
return false;
*value = BinaryValue::CreateWithCopiedBuffer(data, length);
break;
}
case Value::TYPE_DICTIONARY: {
scoped_ptr<DictionaryValue> val(new DictionaryValue());
if (!ReadDictionaryValue(m, iter, val.get(), recursion))
return false;
*value = val.release();
break;
}
case Value::TYPE_LIST: {
scoped_ptr<ListValue> val(new ListValue());
if (!ReadListValue(m, iter, val.get(), recursion))
return false;
*value = val.release();
break;
}
default:
return false;
}
return true;
}
void ParamTraits<DictionaryValue>::Write(Message* m, const param_type& p) {
WriteValue(m, &p, 0);
}
bool ParamTraits<DictionaryValue>::Read(
const Message* m, void** iter, param_type* r) {
int type;
if (!ReadParam(m, iter, &type) || type != Value::TYPE_DICTIONARY)
return false;
return ReadDictionaryValue(m, iter, r, 0);
}
void ParamTraits<DictionaryValue>::Log(const param_type& p, std::wstring* l) {
std::string json;
base::JSONWriter::Write(&p, false, &json);
l->append(UTF8ToWide(json));
}
void ParamTraits<ListValue>::Write(Message* m, const param_type& p) {
WriteValue(m, &p, 0);
}
bool ParamTraits<ListValue>::Read(
const Message* m, void** iter, param_type* r) {
int type;
if (!ReadParam(m, iter, &type) || type != Value::TYPE_LIST)
return false;
return ReadListValue(m, iter, r, 0);
}
void ParamTraits<ListValue>::Log(const param_type& p, std::wstring* l) {
std::string json;
base::JSONWriter::Write(&p, false, &json);
l->append(UTF8ToWide(json));
}
} // namespace IPC
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