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//========================================================================
//
// FlateEncoder.h
//
// Copyright (C) 2016, William Bader <williambader@hotmail.com>
// Copyright (C) 2018, 2019 Albert Astals Cid <aacid@kde.org>
//
// This file is under the GPLv2 or later license
//
//========================================================================
#ifndef FLATEENCODE_H
#define FLATEENCODE_H
#include "poppler-config.h"
#include <cstdio>
#include <cstdlib>
#include <cstddef>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <cstring>
#include <cctype>
#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>
}
//------------------------------------------------------------------------
// FlateEncoder
//------------------------------------------------------------------------
class FlateEncoder: public FilterStream {
public:
FlateEncoder(Stream *strA);
~FlateEncoder();
StreamKind getKind() const override { return strWeird; }
void reset() override;
int getChar() override
{ return (outBufPtr >= outBufEnd && !fillBuf()) ? EOF : (*outBufPtr++ & 0xff); }
int lookChar() override
{ return (outBufPtr >= outBufEnd && !fillBuf()) ? EOF : (*outBufPtr & 0xff); }
GooString *getPSFilter(int psLevel, const char *indent) override { return nullptr; }
bool isBinary(bool last = true) override { return true; }
bool isEncoder() override { return true; }
private:
static const int inBufSize = 16384;
static const int outBufSize = inBufSize;
unsigned char inBuf[ inBufSize ];
unsigned char outBuf[ outBufSize ];
unsigned char *outBufPtr;
unsigned char *outBufEnd;
bool inBufEof;
bool outBufEof;
z_stream zlib_stream;
bool fillBuf();
};
#endif
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