96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2018 Tom Zander <tom@flowee.org>
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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 TX_ITERATOR_P_H
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#define TX_ITERATOR_P_H
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/*
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* WARNING USAGE OF THIS HEADER IS RESTRICTED.
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* This Header file is part of the private API and is meant to be used solely by the Tx component.
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*
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* Usage of this API will likely mean your code will break in interesting ways in the future,
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* or even stop to compile.
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*
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* YOU HAVE BEEN WARNED!!
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*/
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#include "FastTransaction.h"
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class FastBlock;
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uint64_t readCompactSize(const char **in, const char *end)
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{
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uint8_t b = static_cast<uint8_t>(*in[0]);
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if (b < 253) {
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*in += 1;
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return b;
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}
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if (b == 253) {
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if (*in + 3 > end)
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throw std::runtime_error("readCompactSize not enough bytes");
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*in += 3;
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return le16toh(*((uint16_t*)(*in - 2)));
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}
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if (b == 254) {
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if (*in + 5 > end)
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throw std::runtime_error("readCompactSize not enough bytes");
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*in += 5;
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return le32toh(*((uint32_t*)(*in - 4)));
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}
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if (*in + 9 > end)
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throw std::runtime_error("readCompactSize not enough bytes");
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*in += 9;
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return le64toh(*((uint64_t*)(*in - 8)));
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}
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int readCompactSizeSize(const char *in)
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{
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uint8_t b = static_cast<uint8_t>(in[0]);
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if (b < 253) return 1;
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if (b == 253) return 3;
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if (b == 254) return 5;
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return 9;
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}
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class TxTokenizer {
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public:
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TxTokenizer(const Streaming::ConstBuffer &buffer);
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TxTokenizer(const FastBlock &block, int offsetInBlock);
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Tx::Component next();
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inline Tx::Component tag() const {
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return static_cast<Tx::Component>(m_tag);
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}
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Tx::Component checkSpaceForTag();
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const Streaming::ConstBuffer m_data;
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const char *m_txStart;
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const char *m_privData;
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const char *m_end;
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const char *m_currentTokenStart;
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const char *m_currentTokenEnd;
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int m_numInputsLeft = -1;
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int m_numOutputsLeft = -1;
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int32_t m_tag = -1;
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};
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#endif
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