294 lines
9 KiB
C++
Executable file
294 lines
9 KiB
C++
Executable file
/*
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* Copyright (C) 2021 Duowan Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __X_PACK_JSON_ENCODER_H
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#define __X_PACK_JSON_ENCODER_H
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#include <string>
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#include "rapidjson_custom.h"
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#include "rapidjson/prettywriter.h"
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#include "rapidjson/stringbuffer.h"
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#include "xencoder.h"
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#include "json_data.h"
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namespace xpack {
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class JsonWriter:private noncopyable {
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typedef rapidjson::StringBuffer JSON_WRITER_BUFFER;
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typedef rapidjson::Writer<rapidjson::StringBuffer> JSON_WRITER_WRITER;
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typedef rapidjson::PrettyWriter<rapidjson::StringBuffer> JSON_WRITER_PRETTY;
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friend class XEncoder<JsonWriter>;
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friend class JsonEncoder;
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const static bool support_null = true;
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public:
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JsonWriter(int indentCount = -1, char indentChar = ' ', int maxDecimalPlaces = -1) {
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_buf = new JSON_WRITER_BUFFER;
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if (indentCount < 0) {
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_writer = new JSON_WRITER_WRITER(*_buf);
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if (maxDecimalPlaces > 0) {
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_writer->SetMaxDecimalPlaces(maxDecimalPlaces);
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}
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_pretty = NULL;
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} else {
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_pretty = new JSON_WRITER_PRETTY(*_buf);
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_pretty->SetIndent(indentChar, indentCount);
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if (maxDecimalPlaces > 0) {
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_pretty->SetMaxDecimalPlaces(maxDecimalPlaces);
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}
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_writer = NULL;
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}
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}
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~JsonWriter() {
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if (NULL != _buf) {
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delete _buf;
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_buf = NULL;
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}
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if (NULL != _writer) {
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delete _writer;
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_writer = NULL;
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}
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if (NULL != _pretty) {
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delete _pretty;
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_pretty = NULL;
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}
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}
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private:
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inline static const char *Name() {
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return "json";
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}
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inline const char *IndexKey(size_t index) {
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(void)index;
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return NULL;
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}
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std::string String() {
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return _buf->GetString();
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}
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void ArrayBegin(const char *key, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->StartArray();
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} else {
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if (Extend::Flag(ext) & X_PACK_FLAG_SL) {
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_pretty->SetFormatOptions(rapidjson::kFormatSingleLineArray);
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}
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_pretty->StartArray();
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}
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}
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void ArrayEnd(const char *key, const Extend *ext) {
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(void)key;
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(void)ext;
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if (NULL != _writer) {
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_writer->EndArray();
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} else {
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_pretty->EndArray();
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if (Extend::Flag(ext) & X_PACK_FLAG_SL) {
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_pretty->SetFormatOptions(rapidjson::kFormatDefault);
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}
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}
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}
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void ObjectBegin(const char *key, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->StartObject();
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} else {
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_pretty->StartObject();
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}
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}
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void ObjectEnd(const char *key, const Extend *ext) {
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(void)key;
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(void)ext;
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if (NULL != _writer) {
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_writer->EndObject();
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} else {
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_pretty->EndObject();
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}
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}
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bool WriteNull(const char*key, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->Null();
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} else {
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_pretty->Null();
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}
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return true;
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}
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bool encode_bool(const char*key, const bool&val, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->Bool(val);
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} else {
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_pretty->Bool(val);
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}
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return true;
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}
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bool encode_string(const char*key, const char*val, size_t length, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->String(val, length);
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} else {
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_pretty->String(val, length);
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}
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return true;
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}
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bool encode_string(const char*key, const std::string&val, const Extend *ext) {
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return this->encode_string(key, val.data(), val.length(), ext);
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}
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template <typename T>
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typename x_enable_if<numeric<T>::is_integer && numeric<T>::is_signed, bool>::type encode_number(const char*key, const T&val, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->Int64((int64_t)val);
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} else {
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_pretty->Int64((int64_t)val);
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}
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return true;
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}
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template <typename T>
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typename x_enable_if<numeric<T>::is_integer && !numeric<T>::is_signed, bool>::type encode_number(const char*key, const T&val, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->Uint64((uint64_t)val);
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} else {
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_pretty->Uint64((uint64_t)val);
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}
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return true;
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}
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template <typename T>
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typename x_enable_if<numeric<T>::is_float, bool>::type encode_number(const char*key, const T&val, const Extend *ext) {
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(void)ext;
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xpack_set_key(key);
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if (NULL != _writer) {
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_writer->Double((double)val);
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} else {
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_pretty->Double((double)val);
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}
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return true;
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}
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// JsonData
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bool encode_type_spec(const char*key, const JsonData&val, const Extend *ext) {
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if (val.current == NULL) {
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return false;
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}
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return this->encode_json_value(key, *val.current, ext);
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}
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bool encode_json_value(const char*key, const rapidjson::Value& val, const Extend *ext) {
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switch (val.GetType()){
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case rapidjson::kNullType:
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return this->WriteNull(key, ext);
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case rapidjson::kFalseType:
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case rapidjson::kTrueType:
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return this->encode_bool(key, val.GetBool(), ext);
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case rapidjson::kStringType:
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return this->encode_string(key, val.GetString(), (size_t)val.GetStringLength(), ext);
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case rapidjson::kNumberType:
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if (val.IsDouble()) {
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return this->encode_number(key, val.GetDouble(), ext);
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} else {
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return this->encode_number(key, val.GetInt64(), ext);
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}
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case rapidjson::kObjectType:
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this->ObjectBegin(key, ext);
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for (rapidjson::Value::ConstMemberIterator iter = val.MemberBegin(); iter!=val.MemberEnd(); ++iter) {
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this->encode_json_value(iter->name.GetString(), iter->value, ext);
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}
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this->ObjectEnd(key, ext);
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break;
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case rapidjson::kArrayType:{
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this->ArrayBegin(key, ext);
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size_t max = (size_t)val.Size();
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for (size_t i = 0; i<max; ++i) {
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this->encode_json_value(NULL, val[(rapidjson::SizeType)i], ext);
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}
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this->ArrayEnd(key, ext);
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}
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break;
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}
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return true;
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}
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void xpack_set_key(const char*key) { // openssl defined set_key macro, so we named it xpack_set_key
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if (NULL!=key && key[0]!='\0') {
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if (NULL != _writer) {
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_writer->Key(key);
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} else {
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_pretty->Key(key);
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}
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}
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}
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JSON_WRITER_BUFFER* _buf;
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JSON_WRITER_WRITER* _writer;
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JSON_WRITER_PRETTY* _pretty;
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};
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class JsonEncoder {
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public:
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JsonEncoder() {
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indentCount = -1;
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indentChar = ' ';
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maxDecimalPlaces = -1;
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}
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JsonEncoder(int _indentCount, char _indentChar, int _maxDecimalPlaces = -1) { // compat
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indentCount = _indentCount;
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indentChar = _indentChar;
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maxDecimalPlaces = _maxDecimalPlaces;
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}
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void SetMaxDecimalPlaces(int _maxDecimalPlaces) {
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maxDecimalPlaces = _maxDecimalPlaces;
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}
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template <class T>
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std::string encode(const T&val) {
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JsonWriter wr(indentCount, indentChar, maxDecimalPlaces);
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XEncoder<JsonWriter> en(wr);
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en.encode(NULL, val, NULL);
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return wr.String();
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}
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private:
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int indentCount;
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char indentChar;
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int maxDecimalPlaces;
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};
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// //////////////// JsonData ///////////////////////
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template<>struct is_xpack_type_spec<JsonWriter, JsonData> {static bool const value = true;};
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inline std::string JsonData::String() const {
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JsonEncoder en;
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return en.encode(*this);
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}
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}
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#endif
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