src/lib/BasicASN1Reader.h
author František Kučera <franta-hg@frantovo.cz>
Sat, 19 Jun 2021 22:43:00 +0200
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BasicASN1Reader: read from the buffer and commit
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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 <memory>
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#include <vector>
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#include "ASN1Reader.h"
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namespace relpipe {
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namespace in {
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namespace asn1 {
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namespace lib {
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/**
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 * Reads ASN.1 data encoded as BER (DER, CER).
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 */
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class BasicASN1Reader : public ASN1Reader {
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private:
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	enum class State {
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		A,
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		B,
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		C
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	};
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	State state = State::A;
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	bool started = false;
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	void readNext() {
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		char type;
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		read(&type, 1);
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		commit();
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		if (!started) {
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			handlers.writeStreamStart();
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			started = true;
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		}
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		handlers.writeCollectionStart(ASN1ContentHandler::CollectionType::Sequence);
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		handlers.writeNull();
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		handlers.writeBoolean(true);
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		handlers.writeInteger(type);
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		handlers.writeString(ASN1ContentHandler::StringType::UTF8String, "relational pipes");
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		handlers.writeCollectionEnd();
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		if (state == State::A) {
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		} else if (state == State::B) {
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		} else if (state == State::C) {
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		}
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	}
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protected:
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	void update() override {
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		while (true) readNext();
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	}
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public:
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	void close() override {
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		if (started) handlers.writeStreamEnd();
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	}
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};
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}
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}
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}
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}