source/libs/poppler/poppler-src/poppler/FlateStream.h

   1 //========================================================================
   2 //
   3 // FlateStream.h
   4 //
   5 // Copyright (C) 2005, Jeff Muizelaar <jeff@infidigm.net>
   6 // Copyright (C) 2010, 2011, Albert Astals Cid <aacid@kde.org>
   7 //
   8 // This file is under the GPLv2 or later license
   9 //
  10 //========================================================================
  11
  12 #ifndef FLATESTREAM_H
  13 #define FLATESTREAM_H
  14
  15 #ifdef USE_GCC_PRAGMAS
  16 #pragma interface
  17 #endif
  18
  19
  20 #ifdef USE_GCC_PRAGMAS
  21 #pragma implementation
  22 #endif
  23
  24 #include "poppler-config.h"
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <stddef.h>
  28 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31 #include <string.h>
  32 #include <ctype.h>
  33 #include "goo/gmem.h"
  34 #include "goo/gfile.h"
  35 #include "Error.h"
  36 #include "Object.h"
  37 #include "Decrypt.h"
  38 #include "Stream.h"
  39
  40 extern "C" {
  41 #include <zlib.h>
  42 }
  43
  44 class FlateStream: public FilterStream {
  45 public:
  46
  47   FlateStream(Stream *strA, int predictor, int columns, int colors, int bits);
  48   virtual ~FlateStream();
  49   virtual StreamKind getKind() { return strFlate; }
  50   virtual void reset();
  51   virtual int getChar();
  52   virtual int lookChar();
  53   virtual int getRawChar();
  54   virtual void getRawChars(int nChars, int *buffer);
  55   virtual GooString *getPSFilter(int psLevel, const char *indent);
  56   virtual GBool isBinary(GBool last = gTrue);
  57
  58 private:
  59   inline int doGetRawChar() {
  60     if (fill_buffer())
  61       return EOF;
  62
  63     return out_buf[out_pos++];
  64   }
  65
  66   int fill_buffer(void);
  67   z_stream d_stream;
  68   StreamPredictor *pred;
  69   int status;
  70   /* in_buf currently needs to be 1 or we over read from EmbedStreams */
  71   unsigned char in_buf[1];
  72   unsigned char out_buf[4096];
  73   int out_pos;
  74   int out_buf_len;
  75 };
  76
  77 #endif