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TomZ
81 lines
2.2 KiB
C++
81 lines
2.2 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 MESSAGEPARSER_H
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#define MESSAGEPARSER_H
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#include <QByteArray>
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#include <QVariant>
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#include <QPointF>
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class QIODevice;
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class QString;
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/**
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* MessageParser takes a CMF stream and parses it into tokens.
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*
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* A user can iterate over tokens by repeatedly calling next() and as
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* long as FoundTag is returned you can then find the token-tag
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* as well as the actual data. The MessageParser will actually have typed
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* data based on what was encoded in the CMF stream. You can access
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* this using the different getters like getLong() getString(). Please note
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* that if the requested data is not what was present in the stream you will
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* end up throwing a casting exception in those getters.
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*/
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class MessageParser
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{
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public:
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MessageParser(const QByteArray &data);
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enum Type {
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FoundTag,
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EndOfDocument,
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Error
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};
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Type next();
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quint32 tag() const;
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QVariant data();
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/// return the amount of bytes consumed up-including the latest parsed tag.
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inline int consumed() const {
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return m_position;
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}
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/// consume a number of bytes without parsing.
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void consume(int bytes);
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private:
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const QByteArray m_data;
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const char *m_privData;
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int m_position;
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QVariant m_value;
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quint32 m_tag;
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enum LazyState {
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ValueParsed,
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LazyByteArray,
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LazyString
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};
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LazyState m_valueState;
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int m_dataStart;
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int m_dataLength;
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};
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#endif
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