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366 lines (318 loc) · 11.6 KB
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/*
* Tencent is pleased to support the open source community by making
* MMKV available.
*
* Copyright (C) 2018 THL A29 Limited, a Tencent company.
* All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of
* the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "MiniPBCoder.h"
#include "CodedInputData.h"
#include "CodedInputDataCrypt.h"
#include "CodedOutputData.h"
#include "PBEncodeItem.hpp"
#ifdef MMKV_APPLE
# if __has_feature(objc_arc)
# error This file must be compiled with MRC. Use -fno-objc-arc flag.
# endif
#endif // MMKV_APPLE
using namespace std;
namespace mmkv {
MiniPBCoder::MiniPBCoder() : m_encodeItems(new std::vector<PBEncodeItem>()) {
}
MiniPBCoder::MiniPBCoder(const MMBuffer *inputBuffer, AESCrypt *crypter) : MiniPBCoder() {
m_inputBuffer = inputBuffer;
#ifndef MMKV_DISABLE_CRYPT
if (crypter) {
m_inputDataDecrpt = new CodedInputDataCrypt(m_inputBuffer->getPtr(), m_inputBuffer->length(), *crypter);
} else {
m_inputData = new CodedInputData(m_inputBuffer->getPtr(), m_inputBuffer->length());
}
#else
m_inputData = new CodedInputData(m_inputBuffer->getPtr(), m_inputBuffer->length());
#endif // MMKV_DISABLE_CRYPT
}
MiniPBCoder::~MiniPBCoder() {
delete m_inputData;
#ifndef MMKV_DISABLE_CRYPT
delete m_inputDataDecrpt;
#endif
delete m_outputBuffer;
delete m_outputData;
delete m_encodeItems;
}
// encode
// write object using prepared m_encodeItems[]
void MiniPBCoder::writeRootObject() {
for (size_t index = 0, total = m_encodeItems->size(); index < total; index++) {
PBEncodeItem *encodeItem = &(*m_encodeItems)[index];
switch (encodeItem->type) {
case PBEncodeItemType_Data: {
m_outputData->writeData(*(encodeItem->value.bufferValue));
break;
}
case PBEncodeItemType_Container: {
m_outputData->writeUInt32(encodeItem->valueSize);
break;
}
#ifndef MMKV_APPLE
case PBEncodeItemType_String: {
m_outputData->writeString(*(encodeItem->value.strValue));
break;
}
#else
case PBEncodeItemType_NSString: {
m_outputData->writeUInt32(encodeItem->valueSize);
if (encodeItem->valueSize > 0 && encodeItem->value.tmpObjectValue != nullptr) {
auto obj = (__bridge NSData *) encodeItem->value.tmpObjectValue;
MMBuffer buffer(obj, MMBufferNoCopy);
m_outputData->writeRawData(buffer);
}
break;
}
case PBEncodeItemType_NSData: {
m_outputData->writeUInt32(encodeItem->valueSize);
if (encodeItem->valueSize > 0 && encodeItem->value.objectValue != nullptr) {
auto obj = (__bridge NSData *) encodeItem->value.objectValue;
MMBuffer buffer(obj, MMBufferNoCopy);
m_outputData->writeRawData(buffer);
}
break;
}
case PBEncodeItemType_NSDate: {
NSDate *oDate = (__bridge NSDate *) encodeItem->value.objectValue;
m_outputData->writeDouble(oDate.timeIntervalSince1970);
break;
}
#endif // MMKV_APPLE
case PBEncodeItemType_None: {
MMKVError("%d", encodeItem->type);
break;
}
}
}
}
size_t MiniPBCoder::prepareObjectForEncode(const MMBuffer &buffer) {
m_encodeItems->push_back(PBEncodeItem());
PBEncodeItem *encodeItem = &(m_encodeItems->back());
size_t index = m_encodeItems->size() - 1;
{
encodeItem->type = PBEncodeItemType_Data;
encodeItem->value.bufferValue = &buffer;
encodeItem->valueSize = static_cast<uint32_t>(buffer.length());
}
encodeItem->compiledSize = pbRawVarint32Size(encodeItem->valueSize) + encodeItem->valueSize;
return index;
}
#ifndef MMKV_DISABLE_CRYPT
size_t MiniPBCoder::prepareObjectForEncode(const MMKVVector &vec) {
m_encodeItems->push_back(PBEncodeItem());
PBEncodeItem *encodeItem = &(m_encodeItems->back());
size_t index = m_encodeItems->size() - 1;
{
encodeItem->type = PBEncodeItemType_Container;
encodeItem->value.bufferValue = nullptr;
for (const auto &itr : vec) {
const auto &key = itr.first;
const auto &value = itr.second;
# ifdef MMKV_APPLE
if (key.length <= 0) {
# else
if (key.length() <= 0) {
# endif
continue;
}
size_t keyIndex = prepareObjectForEncode(key);
if (keyIndex < m_encodeItems->size()) {
size_t valueIndex = prepareObjectForEncode(value);
if (valueIndex < m_encodeItems->size()) {
(*m_encodeItems)[index].valueSize += (*m_encodeItems)[keyIndex].compiledSize;
(*m_encodeItems)[index].valueSize += (*m_encodeItems)[valueIndex].compiledSize;
} else {
m_encodeItems->pop_back(); // pop key
}
}
}
encodeItem = &(*m_encodeItems)[index];
}
encodeItem->compiledSize = pbRawVarint32Size(encodeItem->valueSize) + encodeItem->valueSize;
return index;
}
#endif // MMKV_DISABLE_CRYPT
MMBuffer MiniPBCoder::writePreparedItems(size_t index) {
PBEncodeItem *oItem = (index < m_encodeItems->size()) ? &(*m_encodeItems)[index] : nullptr;
if (oItem && oItem->compiledSize > 0) {
m_outputBuffer = new MMBuffer(oItem->compiledSize);
m_outputData = new CodedOutputData(m_outputBuffer->getPtr(), m_outputBuffer->length());
writeRootObject();
}
return std::move(*m_outputBuffer);
}
MMBuffer MiniPBCoder::encodeDataWithObject(const MMBuffer &obj) {
try {
auto valueSize = static_cast<uint32_t>(obj.length());
auto compiledSize = pbRawVarint32Size(valueSize) + valueSize;
MMBuffer result(compiledSize);
CodedOutputData output(result.getPtr(), result.length());
output.writeData(obj);
return result;
} catch (const std::exception &exception) {
MMKVError("%s", exception.what());
return MMBuffer();
}
}
#ifndef MMKV_APPLE
size_t MiniPBCoder::prepareObjectForEncode(const string &str) {
m_encodeItems->push_back(PBEncodeItem());
PBEncodeItem *encodeItem = &(m_encodeItems->back());
size_t index = m_encodeItems->size() - 1;
{
encodeItem->type = PBEncodeItemType_String;
encodeItem->value.strValue = &str;
encodeItem->valueSize = static_cast<int32_t>(str.size());
}
encodeItem->compiledSize = pbRawVarint32Size(encodeItem->valueSize) + encodeItem->valueSize;
return index;
}
size_t MiniPBCoder::prepareObjectForEncode(const vector<string> &v) {
m_encodeItems->push_back(PBEncodeItem());
PBEncodeItem *encodeItem = &(m_encodeItems->back());
size_t index = m_encodeItems->size() - 1;
{
encodeItem->type = PBEncodeItemType_Container;
encodeItem->value.bufferValue = nullptr;
for (const auto &str : v) {
size_t itemIndex = prepareObjectForEncode(str);
if (itemIndex < m_encodeItems->size()) {
(*m_encodeItems)[index].valueSize += (*m_encodeItems)[itemIndex].compiledSize;
}
}
encodeItem = &(*m_encodeItems)[index];
}
encodeItem->compiledSize = pbRawVarint32Size(encodeItem->valueSize) + encodeItem->valueSize;
return index;
}
vector<string> MiniPBCoder::decodeOneVector() {
vector<string> v;
m_inputData->readInt32();
while (!m_inputData->isAtEnd()) {
auto value = m_inputData->readString();
v.push_back(move(value));
}
return v;
}
void MiniPBCoder::decodeOneMap(MMKVMap &dic, size_t position, bool greedy) {
auto block = [position, this](MMKVMap &dictionary) {
if (position) {
m_inputData->seek(position);
} else {
m_inputData->readInt32();
}
while (!m_inputData->isAtEnd()) {
KeyValueHolder kvHolder;
const auto &key = m_inputData->readString(kvHolder);
if (key.length() > 0) {
m_inputData->readData(kvHolder);
if (kvHolder.valueSize > 0) {
dictionary[key] = move(kvHolder);
} else {
auto itr = dictionary.find(key);
if (itr != dictionary.end()) {
dictionary.erase(itr);
}
}
}
}
};
if (greedy) {
try {
block(dic);
} catch (std::exception &exception) {
MMKVError("%s", exception.what());
}
} else {
try {
MMKVMap tmpDic;
block(tmpDic);
dic.swap(tmpDic);
} catch (std::exception &exception) {
MMKVError("%s", exception.what());
}
}
}
# ifndef MMKV_DISABLE_CRYPT
void MiniPBCoder::decodeOneMap(MMKVMapCrypt &dic, size_t position, bool greedy) {
auto block = [position, this](MMKVMapCrypt &dictionary) {
if (position) {
m_inputDataDecrpt->seek(position);
} else {
m_inputDataDecrpt->readInt32();
}
while (!m_inputDataDecrpt->isAtEnd()) {
KeyValueHolderCrypt kvHolder;
const auto &key = m_inputDataDecrpt->readString(kvHolder);
if (key.length() > 0) {
m_inputDataDecrpt->readData(kvHolder);
if (kvHolder.realValueSize() > 0) {
dictionary[key] = move(kvHolder);
} else {
auto itr = dictionary.find(key);
if (itr != dictionary.end()) {
dictionary.erase(itr);
}
}
}
}
};
if (greedy) {
try {
block(dic);
} catch (std::exception &exception) {
MMKVError("%s", exception.what());
}
} else {
try {
MMKVMapCrypt tmpDic;
block(tmpDic);
dic.swap(tmpDic);
} catch (std::exception &exception) {
MMKVError("%s", exception.what());
}
}
}
# endif // MMKV_DISABLE_CRYPT
vector<string> MiniPBCoder::decodeVector(const MMBuffer &oData) {
MiniPBCoder oCoder(&oData);
return oCoder.decodeOneVector();
}
#endif // MMKV_APPLE
void MiniPBCoder::decodeMap(MMKVMap &dic, const MMBuffer &oData, size_t position) {
MiniPBCoder oCoder(&oData);
oCoder.decodeOneMap(dic, position, false);
}
void MiniPBCoder::greedyDecodeMap(MMKVMap &dic, const MMBuffer &oData, size_t position) {
MiniPBCoder oCoder(&oData);
oCoder.decodeOneMap(dic, position, true);
}
#ifndef MMKV_DISABLE_CRYPT
void MiniPBCoder::decodeMap(MMKVMapCrypt &dic, const MMBuffer &oData, AESCrypt *crypter, size_t position) {
MiniPBCoder oCoder(&oData, crypter);
oCoder.decodeOneMap(dic, position, false);
}
void MiniPBCoder::greedyDecodeMap(MMKVMapCrypt &dic, const MMBuffer &oData, AESCrypt *crypter, size_t position) {
MiniPBCoder oCoder(&oData, crypter);
oCoder.decodeOneMap(dic, position, true);
}
#endif
} // namespace mmkv