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/*
* IO layer : zlib streambuf
*
* Authors:
* Johan Ceuppens <jceuppen at easynet dot be>
*
* Copyright (C) 2004 Johan Ceuppens
*
* Released under GNU LGPL, read the file 'COPYING.LIB' for more information
*/
#ifndef __STREAMS_ZLIB_H_
#define __STREAMS_ZLIB_H_
#include "streams-handles.h"
#include <glib/gtypes.h>
#include <glib/garray.h>
#include <zlib.h>
#include <iostream>
namespace Inkscape {
class ZlibBufferException : public std::exception {};
// This is the initial buffersize for the stream and
// zipbuffers (the streambuffers expand as needed).
const unsigned int BUFSIZE_STREAM = 4096;
/**
* ZlibBuffer
*/
//TODO: unbuffered IO
class ZlibBuffer : public std::streambuf
{
public:
ZlibBuffer(URIHandle& urih);
virtual ~ZlibBuffer() {}
protected:
virtual int allocate_buffers();
virtual int reallocate_buffers(int new_getsize, int new_putsize);
virtual int underflow();
virtual int overflow(int c = EOF);
virtual int flush_output();
virtual void init_inflation() throw(ZlibBufferException);
virtual void reset_inflation() throw(ZlibBufferException);
virtual int consume_and_inflate();
virtual int do_consume_and_inflate(int nbytes);
virtual int consume(guint8 *buf, int nbytes);
virtual int do_consume(guint8 *buf, int nbytes);
virtual GByteArray *inflate(guint8 *in_buffer, int nbytes);
virtual GByteArray *do_inflate(guint8 *in_buffer, int nbytes);
virtual int copy_to_get(guint8 *data, int nbytes);
virtual int do_copy_to_get(guint8 *data, int nbytes);
URIHandle *_urihandle;
private:
ZlibBuffer& operator=(ZlibBuffer const& rhs);
ZlibBuffer(ZlibBuffer const& rhs);
z_stream _zs;
int _putsize, _getsize;//sizes of in and out buffers
};
class izstream : public std::istream {
public:
explicit izstream(std::streambuf& sb) : std::istream(&sb) {}
~izstream() { std::ios::init(0); }
std::streambuf *rdbuf() { return std::ios::rdbuf(); }
std::streambuf *operator ->() { return rdbuf(); }
};
}
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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