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TomZ
56 lines
1.6 KiB
C++
56 lines
1.6 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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#include "CMF.h"
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int CMF::serialize(char *data, quint64 value)
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{
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int pos = 0;
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while (true) {
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data[pos] = (value & 0x7F) | (pos ? 0x80 : 0x00);
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if (value <= 0x7F)
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break;
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value = (value >> 7) - 1;
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pos++;
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}
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// reverse
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for (int i = pos / 2; i >= 0; --i) {
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qSwap(data[i], data[pos - i]);
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}
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return pos + 1;
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}
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bool CMF::unserialize(const char *data, int dataSize, int &position, quint64 &result)
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{
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Q_ASSERT(data);
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Q_ASSERT(result == 0);
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Q_ASSERT(position >= 0);
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int pos = position;
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while (pos - position < 8 && pos < dataSize) {
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unsigned char byte = data[pos++];
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result = (result << 7) | (byte & 0x7F);
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if (byte & 0x80)
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result++;
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else {
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position = pos;
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return true;
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}
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}
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return false;
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}
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