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88 lines
2.9 KiB
88 lines
2.9 KiB
/*
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* Copyright (C) 2008 Tommi Maekitalo
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
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* NON-INFRINGEMENT. See the 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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef ZIM_BUNZIP2STREAM_H
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#define ZIM_BUNZIP2STREAM_H
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#include <iostream>
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#include <stdexcept>
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#include <bzlib.h>
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#include <zim/bzip2.h>
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namespace zim
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{
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class Bzip2UncompressError : public Bzip2Error
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{
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public:
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Bzip2UncompressError(int zRet_, const std::string& msg)
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: Bzip2Error(zRet_, msg)
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{ }
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};
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class Bunzip2StreamBuf : public std::streambuf
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{
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bz_stream stream;
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char_type* iobuffer;
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unsigned bufsize;
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std::streambuf* sinksource;
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char_type* ibuffer() { return iobuffer; }
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std::streamsize ibuffer_size() { return bufsize >> 1; }
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char_type* obuffer() { return iobuffer + ibuffer_size(); }
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std::streamsize obuffer_size() { return bufsize >> 1; }
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public:
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explicit Bunzip2StreamBuf(std::streambuf* sinksource_, bool small = false, unsigned bufsize = 8192);
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~Bunzip2StreamBuf();
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/// see std::streambuf
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int_type overflow(int_type c);
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/// see std::streambuf
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int_type underflow();
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/// see std::streambuf
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int sync();
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void setSinksource(std::streambuf* sinksource_) { sinksource = sinksource_; }
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};
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class Bunzip2Stream : public std::iostream
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{
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Bunzip2StreamBuf streambuf;
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public:
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explicit Bunzip2Stream(std::streambuf* sinksource, bool small = false, unsigned bufsize = 8192)
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: std::iostream(0),
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streambuf(sinksource, small, bufsize)
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{ init(&streambuf); }
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explicit Bunzip2Stream(std::ios& sinksource, bool small = false, unsigned bufsize = 8192)
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: std::iostream(0),
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streambuf(sinksource.rdbuf(), small, bufsize)
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{ init(&streambuf); }
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void setSinksource(std::streambuf* sinksource) { streambuf.setSinksource(sinksource); }
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void setSinksource(std::ios& sinksource) { streambuf.setSinksource(sinksource.rdbuf()); }
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void setSink(std::ostream& sink) { streambuf.setSinksource(sink.rdbuf()); }
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void setSource(std::istream& source) { streambuf.setSinksource(source.rdbuf()); }
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};
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}
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#endif // ZIM_BUNZIP2STREAM_H
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