/**
 * Relational pipes (library)
 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the:
 *  - GNU Lesser General Public License as published by the Free Software Foundation;
 *    version 3 of the License or (at your option)
 *  - GNU General Public License as published by the Free Software Foundation;
 *    version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#pragma once

#include <string>
#include <iostream>
#include <cassert>
#include <limits>

#include <relpipe/protocol/constants.h>

#include "../DataTypeWriter.h"

namespace relpipe {
namespace writer {
namespace types {

using namespace relpipe::protocol;
using namespace relpipe::writer;

/**
 * Signed variable-length integer.
 * LEB128
 */
class IntegerDataTypeWriter : public DataTypeWriter<integer_t> {
public:

	IntegerDataTypeWriter() : DataTypeWriter<integer_t>(TypeId::INTEGER, DATA_TYPE_CODE_INTEGER) {
	}

	void writeValue(std::ostream &output, const integer_t &value) override {
		integer_t v = value;
		bool more;
		do {
			octet_t octet = v & 0x7F;
			v >>= 7;
			more = !(((v == 0) && ((octet & 0x40) == 0)) || ((v == -1) && ((octet & 0x40) != 0)));
			if (more) octet |= 0x80; // more bytes follow
			output << char(octet);
		} while (more);
	}

	integer_t toValue(const string_t &stringValue) override {
		// throws „terminate called after throwing an instance of 'std::invalid_argument'“ SIGABRT, core dumped on invalid number
		return stol(stringValue);
	}

};

}
}
}