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TomZ
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/*
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* This file is part of the Bitcoin project
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* Copyright (C) 2014-2016 Tom Zander <tomz@freedommail.ch>
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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, either version 3 of the License, or
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* (at your option) any later version.
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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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#ifndef STREAMMETHODS_H
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#define STREAMMETHODS_H
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#include <QByteArray>
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namespace Streaming {
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inline unsigned int fetch32bitValue(const char *array, int offset)
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{
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unsigned int answer = static_cast<unsigned char>(array[offset + 3]);
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answer = answer << 8;
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answer += static_cast<unsigned char>(array[offset + 2]);
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answer = answer << 8;
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answer += static_cast<unsigned char>(array[offset + 1]);
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answer = answer << 8;
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answer += static_cast<unsigned char>(array[offset]);
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return answer;
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}
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void insert32BitInt(QByteArray &array, quint32 value, int pos);
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inline quint64 fetch64bitValue(const char *array, int offset)
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{
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quint64 answer = fetch32bitValue(array, offset + 4);
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answer = answer << 32;
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answer += fetch32bitValue(array, offset);
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return answer;
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}
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static inline unsigned int fetch16bitValue(const char *array, int offset)
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{
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unsigned int answer = static_cast<unsigned char>(array[offset + 1]);
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answer = answer << 8;
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answer += static_cast<unsigned char>(array[offset]);
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return answer;
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}
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// Bitcoin has its own, kinda braindead, var-int "compact" format.
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// Its not very compact, though.
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inline quint64 fetchBitcoinCompact(const char *array, int &offset)
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{
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int indicator = (unsigned char) array[offset++];
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if (indicator < 253)
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return indicator;
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if (indicator == 253) {
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unsigned int answer = fetch16bitValue(array, offset);
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offset += 2;
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return answer;
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}
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if (indicator == 254)
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{
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unsigned int answer = fetch32bitValue(array, offset);
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offset += 4;
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return answer;
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}
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quint64 answer = fetch64bitValue(array, offset);
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offset += 8;
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return answer;
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}
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}
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#endif
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