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//========================================================================
//
// FlateStream.h
//
// Copyright (C) 2005, Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2010, 2011, Albert Astals Cid <aacid@kde.org>
//
// This file is under the GPLv2 or later license
//
//========================================================================
#ifndef FLATESTREAM_H
#define FLATESTREAM_H
#include "poppler-config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <ctype.h>
#include "goo/gmem.h"
#include "goo/gfile.h"
#include "Error.h"
#include "Object.h"
#include "Decrypt.h"
#include "Stream.h"
extern "C" {
#include <zlib.h>
}
class FlateStream: public FilterStream {
public:
FlateStream(Stream *strA, int predictor, int columns, int colors, int bits);
virtual ~FlateStream();
virtual StreamKind getKind() override { return strFlate; }
virtual void reset() override;
virtual int getChar() override;
virtual int lookChar() override;
virtual int getRawChar() override;
virtual void getRawChars(int nChars, int *buffer) override;
virtual GooString *getPSFilter(int psLevel, const char *indent) override;
virtual GBool isBinary(GBool last = gTrue) override;
private:
inline int doGetRawChar() {
if (fill_buffer())
return EOF;
return out_buf[out_pos++];
}
int fill_buffer(void);
z_stream d_stream;
StreamPredictor *pred;
int status;
/* in_buf currently needs to be 1 or we over read from EmbedStreams */
unsigned char in_buf[1];
unsigned char out_buf[4096];
int out_pos;
int out_buf_len;
};
#endif
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