146 lines
3.9 KiB
C++
Executable file
146 lines
3.9 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_YAML_ENCODER_H
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#define __X_PACK_YAML_ENCODER_H
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#include <string>
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#include "yaml-cpp/yaml.h"
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#include "xencoder.h"
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namespace xpack {
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class YamlWriter:private noncopyable {
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friend class XEncoder<YamlWriter>;
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friend class YamlEncoder;
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const static bool support_null = true;
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public:
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YamlWriter(size_t indent = 2, int maxDecimalPlaces = -1) {
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e.SetIndent(indent);
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if (maxDecimalPlaces > 0) {
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e.SetFloatPrecision((size_t)maxDecimalPlaces);
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e.SetDoublePrecision((size_t)maxDecimalPlaces);
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}
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}
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~YamlWriter() {
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}
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private:
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inline static const char *Name() {
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return "yaml";
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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 std::string(e.c_str(), e.size());
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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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e << YAML::Value << YAML::BeginSeq;
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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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e << YAML::EndSeq;
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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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e << YAML::Value << YAML::BeginMap;
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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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e << YAML::EndMap;
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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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e << YAML::Value << YAML::Null;
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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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e << YAML::Value << val;
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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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(void)ext;
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xpack_set_key(key);
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if (!val.empty()) {
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e << YAML::Value << val;
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} else {
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e << YAML::Value << YAML::Null;
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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>::value, 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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e << YAML::Value << val;
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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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e << YAML::Key << key;
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}
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}
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YAML::Emitter e;
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};
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class YamlEncoder {
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public:
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YamlEncoder() {
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indentCount = 2;
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maxDecimalPlaces = -1;
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}
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YamlEncoder& SetIndent(size_t indent) {
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indentCount = indent;
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return *this;
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}
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YamlEncoder& SetMaxDecimalPlaces(int _maxDecimalPlaces) {
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maxDecimalPlaces = _maxDecimalPlaces;
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return *this;
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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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YamlWriter wr(indentCount, maxDecimalPlaces);
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XEncoder<YamlWriter> 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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size_t indentCount;
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int maxDecimalPlaces;
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};
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}
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#endif
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