author | František Kučera <franta-hg@frantovo.cz> |
Sat, 04 Dec 2021 21:14:48 +0100 | |
branch | v_0 |
changeset 11 | 6282949e3672 |
parent 9 | 7d309accc639 |
permissions | -rw-r--r-- |
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/** |
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* Relational pipes |
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* Copyright © 2021 František Kučera (Frantovo.cz, GlobalCode.info) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, version 3 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <string> |
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#include <relpipe/writer/RelationalWriter.h> |
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#include "lib/ASN1ContentHandler.h" |
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#include "Configuration.h" |
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namespace relpipe { |
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namespace in { |
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namespace asn1 { |
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namespace freeformOption { |
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static const char* BitStringSymbol0 = "bit-string-symbol-0"; |
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static const char* BitStringSymbol1 = "bit-string-symbol-1"; |
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} |
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/** |
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* Converts arbitrary ASN.1 stream of events to a relation |
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* i.e. does not require any specific structures/schema. |
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* |
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* Useful especially for testing and debugging and sometimes instead of relpipe-in-asn1table, |
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* because this handler supports streaming and does not depend on any third-party library (no XML dependency). |
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*/ |
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class FreeformASN1ContentHandler : public lib::ASN1ContentHandler { |
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private: |
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wstring_convert < codecvt_utf8<wchar_t>> convertor; // ASN.1 parser works with UTF-8 |
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std::shared_ptr<relpipe::writer::RelationalWriter> writer; |
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Configuration configuration; |
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std::vector<relpipe::common::type::Integer> position; |
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std::string bitStringSymbol0 = "0"; |
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std::string bitStringSymbol1 = "1"; |
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class Record { |
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public: |
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const Header* header; |
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const std::vector<relpipe::common::type::Integer>& position; |
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relpipe::common::type::Integer level = 0; |
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relpipe::common::type::StringX event; |
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relpipe::common::type::StringX valueText; |
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relpipe::common::type::StringX valueBinary; |
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Record(const Header* header, std::vector<relpipe::common::type::Integer>& position, relpipe::common::type::StringX event) : header(header), position(position), event(event) { |
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} |
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virtual ~Record() { |
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} |
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}; |
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void write(const Record& r) { |
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relpipe::common::type::Integer tag = r.header ? r.header->tag : -1; // TODO: null + possible integer overflow |
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relpipe::common::type::Integer id = r.position.back(); |
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relpipe::common::type::Integer parent = r.position[r.position.size() - 2]; |
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relpipe::common::type::Integer level = r.position.size() - 2; |
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relpipe::common::type::StringX pc; |
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relpipe::common::type::StringX tagClass; |
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if (r.header) { |
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if (r.header->pc == PC::Primitive) pc = L"primitive"; |
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else if (r.header->pc == PC::Constructed) pc = L"primitive"; |
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else throw std::logic_error("Unexpected PC: " + std::to_string((uint8_t) r.header->pc)); // should never happen |
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if (r.header->tagClass == TagClass::Universal) tagClass = L"universal"; |
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else if (r.header->tagClass == TagClass::ContextSpecific) tagClass = L"context"; |
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else if (r.header->tagClass == TagClass::Application) tagClass = L"application"; |
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else if (r.header->tagClass == TagClass::Private) tagClass = L"private"; |
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else throw std::logic_error("Unexpected TagClass: " + std::to_string((uint8_t) r.header->tagClass)); // should never happen |
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} |
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writer->writeAttribute(&id, typeid (id)); |
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writer->writeAttribute(&parent, typeid (parent)); |
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writer->writeAttribute(&level, typeid (level)); |
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writer->writeAttribute(&r.event, typeid (r.event)); |
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// writer->writeAttribute(&pc, typeid (pc)); |
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writer->writeAttribute(&tagClass, typeid (tagClass)); |
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writer->writeAttribute(&tag, typeid (tag)); |
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writer->writeAttribute(&r.valueText, typeid (r.valueText)); |
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writer->writeAttribute(&r.valueBinary, typeid (r.valueBinary)); |
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} |
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/** |
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* @param header |
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* @param value an octet string |
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* @return original value if octet string was a text string; otherwise an empty string |
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103 |
*/ |
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104 |
const std::string getText(const Header& header, const std::string& value) { |
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105 |
// TODO: support also UTF-8 |
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for (uint8_t b : value) if (b < 32 || b >= 127) return ""; |
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return value; |
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108 |
} |
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109 |
|
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110 |
public: |
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111 |
|
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FreeformASN1ContentHandler(std::shared_ptr<relpipe::writer::RelationalWriter> writer, Configuration configuration) : writer(writer), configuration(configuration) { |
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113 |
} |
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114 |
|
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115 |
bool setOption(const std::string& uri, const std::string& value) override { |
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if (uri == freeformOption::BitStringSymbol0) bitStringSymbol0 = value; |
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else if (uri == freeformOption::BitStringSymbol1) bitStringSymbol1 = value; |
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118 |
else return false; |
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119 |
|
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return true; |
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121 |
} |
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122 |
|
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123 |
void writeStreamStart() override { |
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writer->startRelation(configuration.relation,{ |
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{L"id", relpipe::writer::TypeId::INTEGER}, |
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126 |
{L"parent", relpipe::writer::TypeId::INTEGER}, |
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{L"level", relpipe::writer::TypeId::INTEGER}, |
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128 |
{L"event", relpipe::writer::TypeId::STRING}, |
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129 |
// {L"pc", relpipe::writer::TypeId::STRING}, |
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{L"tag_class", relpipe::writer::TypeId::STRING}, |
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131 |
{L"tag", relpipe::writer::TypeId::INTEGER}, |
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132 |
{L"value_text", relpipe::writer::TypeId::STRING}, |
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133 |
{L"value_binary", relpipe::writer::TypeId::STRING}, // TODO: OctetString data type (when available) instead of text |
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134 |
}, true); |
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135 |
|
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136 |
position.push_back(-1); // TODO: null |
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137 |
position.push_back(1); |
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138 |
Record r(nullptr, position, L"stream-start"); |
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139 |
write(r); |
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140 |
position.push_back(position.back()); |
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141 |
} |
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142 |
|
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143 |
void writeStreamEnd() override { |
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144 |
Record r(nullptr, position, L"stream-end"); |
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write(r); |
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146 |
|
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147 |
auto id = position.back() + 1; |
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148 |
position.pop_back(); |
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149 |
position.back() = id; |
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150 |
} |
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151 |
|
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152 |
void writeCollectionStart(const Header& header) override { |
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153 |
position.back()++; |
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154 |
Record r(&header, position, L"collection-start"); |
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155 |
write(r); |
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156 |
position.push_back(position.back()); |
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157 |
} |
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158 |
|
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159 |
void writeCollectionEnd() override { |
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160 |
Record r(nullptr, position, L"collection-end"); |
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161 |
write(r); |
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162 |
|
2
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163 |
auto id = position.back() + 1; |
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|
164 |
position.pop_back(); |
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|
165 |
position.back() = id; |
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166 |
} |
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|
167 |
|
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|
168 |
void writeBitString(const Header& header, std::vector<bool> value) override { |
4
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|
169 |
std::stringstream bits; |
9
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|
170 |
for (bool b : value) bits << (b ? bitStringSymbol1 : bitStringSymbol0); |
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171 |
|
2
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172 |
position.back()++; |
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|
173 |
Record r(&header, position, L"bit-string"); |
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|
174 |
r.valueText = convertor.from_bytes(bits.str()); |
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175 |
write(r); |
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|
176 |
} |
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177 |
|
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|
178 |
void writeBoolean(const Header& header, bool value) override { |
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179 |
position.back()++; |
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180 |
Record r(&header, position, L"boolean"); |
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181 |
r.valueText = value ? L"true" : L"false"; |
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182 |
r.valueBinary = value ? L"FF" : L"00"; |
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183 |
write(r); |
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184 |
} |
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185 |
|
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186 |
void writeDateTime(const Header& header, DateTime value) override { |
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187 |
position.back()++; |
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188 |
Record r(&header, position, L"date-time"); |
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189 |
r.valueText = convertor.from_bytes(value.toString()); |
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190 |
write(r); |
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191 |
} |
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192 |
|
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193 |
void writeInteger(const Header& header, Integer value) override { |
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194 |
position.back()++; |
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195 |
Record r(&header, position, L"integer"); |
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196 |
r.valueText = convertor.from_bytes(value.toString()); |
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197 |
r.valueBinary = convertor.from_bytes(value.toHex()); |
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198 |
write(r); |
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199 |
} |
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200 |
|
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201 |
void writeNull(const Header& header) override { |
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position.back()++; |
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Record r(&header, position, L"null"); |
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r.valueText = L"null"; |
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write(r); |
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} |
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207 |
|
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208 |
void writeOID(const Header& header, ObjectIdentifier value) override { |
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position.back()++; |
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Record r(&header, position, L"oid"); |
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r.valueText = convertor.from_bytes(value.toString()); |
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write(r); |
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} |
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214 |
|
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void writeOctetString(const Header& header, std::string value) override { |
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std::string text = getText(header, value); |
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std::stringstream hex; |
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hex << std::hex << std::setfill('0'); |
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for (uint8_t b : value) hex << std::setw(2) << (int) b; |
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220 |
|
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position.back()++; |
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Record r(&header, position, L"octet-string"); |
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r.valueText = convertor.from_bytes(text); |
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r.valueBinary = convertor.from_bytes(hex.str()); |
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write(r); |
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} |
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227 |
|
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void writeTextString(const Header& header, std::string value) override { |
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position.back()++; |
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Record r(&header, position, L"text-string"); |
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r.valueText = convertor.from_bytes(value); |
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write(r); |
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233 |
} |
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234 |
|
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void writeSpecific(const Header& header, std::string value) override { |
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236 |
std::stringstream hex; |
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hex << std::hex << std::setfill('0'); |
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238 |
for (uint8_t b : value) hex << std::setw(2) << (int) b; |
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239 |
|
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240 |
std::stringstream ascii; |
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241 |
for (uint8_t b : value) ascii << (b >= 32 && b < 127 ? (char) b : '.'); // TODO: configurable unsupported symbol? |
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242 |
|
2
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243 |
position.back()++; |
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244 |
Record r(&header, position, L"specific"); |
4
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r.valueText = convertor.from_bytes(ascii.str()); |
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246 |
r.valueBinary = convertor.from_bytes(hex.str()); |
2
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247 |
write(r); |
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248 |
} |
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249 |
|
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250 |
|
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251 |
|
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252 |
}; |
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253 |
|
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254 |
} |
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255 |
} |
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256 |
} |