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-//========================================================================
-//
-// Stream.h
-//
-// Copyright 1996-2003 Glyph & Cog, LLC
-//
-//========================================================================
-
-#ifndef STREAM_H
-#define STREAM_H
-
-#include <aconf.h>
-
-#ifdef USE_GCC_PRAGMAS
-#pragma interface
-#endif
-
-#include <stdio.h>
-#include "gtypes.h"
-#include "Object.h"
-
-#ifndef NO_DECRYPTION
-class Decrypt;
-#endif
-class BaseStream;
-
-//------------------------------------------------------------------------
-
-enum StreamKind {
- strFile,
- strASCIIHex,
- strASCII85,
- strLZW,
- strRunLength,
- strCCITTFax,
- strDCT,
- strFlate,
- strJBIG2,
- strJPX,
- strWeird // internal-use stream types
-};
-
-//------------------------------------------------------------------------
-// Stream (base class)
-//------------------------------------------------------------------------
-
-class Stream {
-public:
-
- // Constructor.
- Stream();
-
- // Destructor.
- virtual ~Stream();
-
- // Reference counting.
- int incRef() { return ++ref; }
- int decRef() { return --ref; }
-
- // Get kind of stream.
- virtual StreamKind getKind() = 0;
-
- // Reset stream to beginning.
- virtual void reset() = 0;
-
- // Close down the stream.
- virtual void close();
-
- // Get next char from stream.
- virtual int getChar() = 0;
-
- // Peek at next char in stream.
- virtual int lookChar() = 0;
-
- // Get next char from stream without using the predictor.
- // This is only used by StreamPredictor.
- virtual int getRawChar();
-
- // Get next line from stream.
- virtual char *getLine(char *buf, int size);
-
- // Get current position in file.
- virtual int getPos() = 0;
-
- // Go to a position in the stream. If <dir> is negative, the
- // position is from the end of the file; otherwise the position is
- // from the start of the file.
- virtual void setPos(Guint pos, int dir = 0) = 0;
-
- // Get PostScript command for the filter(s).
- virtual GString *getPSFilter(int psLevel, char *indent);
-
- // Does this stream type potentially contain non-printable chars?
- virtual GBool isBinary(GBool last = gTrue) = 0;
-
- // Get the BaseStream of this stream.
- virtual BaseStream *getBaseStream() = 0;
-
- // Get the dictionary associated with this stream.
- virtual Dict *getDict() = 0;
-
- // Is this an encoding filter?
- virtual GBool isEncoder() { return gFalse; }
-
- // Add filters to this stream according to the parameters in <dict>.
- // Returns the new stream.
- Stream *addFilters(Object *dict);
-
- // Tell this stream to ignore any length limitation -- this only
- // applies to BaseStream subclasses, and is used as a hack to work
- // around broken PDF files with incorrect stream lengths.
- virtual void ignoreLength() {}
-
-private:
-
- Stream *makeFilter(char *name, Stream *str, Object *params);
-
- int ref; // reference count
-};
-
-//------------------------------------------------------------------------
-// BaseStream
-//
-// This is the base class for all streams that read directly from a file.
-//------------------------------------------------------------------------
-
-class BaseStream: public Stream {
-public:
-
- BaseStream(Object *dictA);
- virtual ~BaseStream();
- virtual Stream *makeSubStream(Guint start, GBool limited,
- Guint length, Object *dict) = 0;
- virtual void setPos(Guint pos, int dir = 0) = 0;
- virtual GBool isBinary(GBool last = gTrue) { return last; }
- virtual BaseStream *getBaseStream() { return this; }
- virtual Dict *getDict() { return dict.getDict(); }
-
- // Get/set position of first byte of stream within the file.
- virtual Guint getStart() = 0;
- virtual void moveStart(int delta) = 0;
-
-#ifndef NO_DECRYPTION
- // Set decryption for this stream.
- virtual void doDecryption(Guchar *fileKey, int keyLength,
- int objNum, int objGen);
-#endif
-
-#ifndef NO_DECRYPTION
-protected:
-
- Decrypt *decrypt;
-#endif
-
-private:
-
- Object dict;
-};
-
-//------------------------------------------------------------------------
-// FilterStream
-//
-// This is the base class for all streams that filter another stream.
-//------------------------------------------------------------------------
-
-class FilterStream: public Stream {
-public:
-
- FilterStream(Stream *strA);
- virtual ~FilterStream();
- virtual void close();
- virtual int getPos() { return str->getPos(); }
- virtual void setPos(Guint pos, int dir = 0);
- virtual BaseStream *getBaseStream() { return str->getBaseStream(); }
- virtual Dict *getDict() { return str->getDict(); }
- virtual void ignoreLength() { str->ignoreLength(); }
-
-protected:
-
- Stream *str;
-};
-
-//------------------------------------------------------------------------
-// ImageStream
-//------------------------------------------------------------------------
-
-class ImageStream {
-public:
-
- // Create an image stream object for an image with the specified
- // parameters. Note that these are the actual image parameters,
- // which may be different from the predictor parameters.
- ImageStream(Stream *strA, int widthA, int nCompsA, int nBitsA);
-
- ~ImageStream();
-
- // Reset the stream.
- void reset();
-
- // Gets the next pixel from the stream. <pix> should be able to hold
- // at least nComps elements. Returns false at end of file.
- GBool getPixel(Guchar *pix);
-
- // Returns a pointer to the next line of pixels. Returns NULL at
- // end of file.
- Guchar *getLine();
-
- // Skip an entire line from the image.
- void skipLine();
-
-private:
-
- Stream *str; // base stream
- int width; // pixels per line
- int nComps; // components per pixel
- int nBits; // bits per component
- int nVals; // components per line
- Guchar *imgLine; // line buffer
- int imgIdx; // current index in imgLine
-};
-
-//------------------------------------------------------------------------
-// StreamPredictor
-//------------------------------------------------------------------------
-
-class StreamPredictor {
-public:
-
- // Create a predictor object. Note that the parameters are for the
- // predictor, and may not match the actual image parameters.
- StreamPredictor(Stream *strA, int predictorA,
- int widthA, int nCompsA, int nBitsA);
-
- ~StreamPredictor();
-
- int lookChar();
- int getChar();
-
-private:
-
- GBool getNextLine();
-
- Stream *str; // base stream
- int predictor; // predictor
- int width; // pixels per line
- int nComps; // components per pixel
- int nBits; // bits per component
- int nVals; // components per line
- int pixBytes; // bytes per pixel
- int rowBytes; // bytes per line
- Guchar *predLine; // line buffer
- int predIdx; // current index in predLine
-};
-
-//------------------------------------------------------------------------
-// FileStream
-//------------------------------------------------------------------------
-
-#define fileStreamBufSize 256
-
-class FileStream: public BaseStream {
-public:
-
- FileStream(FILE *fA, Guint startA, GBool limitedA,
- Guint lengthA, Object *dictA);
- virtual ~FileStream();
- virtual Stream *makeSubStream(Guint startA, GBool limitedA,
- Guint lengthA, Object *dictA);
- virtual StreamKind getKind() { return strFile; }
- virtual void reset();
- virtual void close();
- virtual int getChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
- virtual int lookChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual int getPos() { return bufPos + (bufPtr - buf); }
- virtual void setPos(Guint pos, int dir = 0);
- virtual void ignoreLength() { limited = gFalse; }
- virtual Guint getStart() { return start; }
- virtual void moveStart(int delta);
-
-private:
-
- GBool fillBuf();
-
- FILE *f;
- Guint start;
- GBool limited;
- Guint length;
- char buf[fileStreamBufSize];
- char *bufPtr;
- char *bufEnd;
- Guint bufPos;
- int savePos;
- GBool saved;
-};
-
-//------------------------------------------------------------------------
-// MemStream
-//------------------------------------------------------------------------
-
-class MemStream: public BaseStream {
-public:
-
- MemStream(char *bufA, Guint startA, Guint lengthA, Object *dictA);
- virtual ~MemStream();
- virtual Stream *makeSubStream(Guint start, GBool limited,
- Guint lengthA, Object *dictA);
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset();
- virtual void close();
- virtual int getChar()
- { return (bufPtr < bufEnd) ? (*bufPtr++ & 0xff) : EOF; }
- virtual int lookChar()
- { return (bufPtr < bufEnd) ? (*bufPtr & 0xff) : EOF; }
- virtual int getPos() { return (int)(bufPtr - buf); }
- virtual void setPos(Guint pos, int dir = 0);
- virtual Guint getStart() { return start; }
- virtual void moveStart(int delta);
-#ifndef NO_DECRYPTION
- virtual void doDecryption(Guchar *fileKey, int keyLength,
- int objNum, int objGen);
-#endif
-
-private:
-
- char *buf;
- Guint start;
- Guint length;
- char *bufEnd;
- char *bufPtr;
- GBool needFree;
-};
-
-//------------------------------------------------------------------------
-// EmbedStream
-//
-// This is a special stream type used for embedded streams (inline
-// images). It reads directly from the base stream -- after the
-// EmbedStream is deleted, reads from the base stream will proceed where
-// the BaseStream left off. Note that this is very different behavior
-// that creating a new FileStream (using makeSubStream).
-//------------------------------------------------------------------------
-
-class EmbedStream: public BaseStream {
-public:
-
- EmbedStream(Stream *strA, Object *dictA, GBool limitedA, Guint lengthA);
- virtual ~EmbedStream();
- virtual Stream *makeSubStream(Guint start, GBool limitedA,
- Guint lengthA, Object *dictA);
- virtual StreamKind getKind() { return str->getKind(); }
- virtual void reset() {}
- virtual int getChar();
- virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual void setPos(Guint pos, int dir = 0);
- virtual Guint getStart();
- virtual void moveStart(int delta);
-
-private:
-
- Stream *str;
- GBool limited;
- Guint length;
-};
-
-//------------------------------------------------------------------------
-// ASCIIHexStream
-//------------------------------------------------------------------------
-
-class ASCIIHexStream: public FilterStream {
-public:
-
- ASCIIHexStream(Stream *strA);
- virtual ~ASCIIHexStream();
- virtual StreamKind getKind() { return strASCIIHex; }
- virtual void reset();
- virtual int getChar()
- { int c = lookChar(); buf = EOF; return c; }
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- int buf;
- GBool eof;
-};
-
-//------------------------------------------------------------------------
-// ASCII85Stream
-//------------------------------------------------------------------------
-
-class ASCII85Stream: public FilterStream {
-public:
-
- ASCII85Stream(Stream *strA);
- virtual ~ASCII85Stream();
- virtual StreamKind getKind() { return strASCII85; }
- virtual void reset();
- virtual int getChar()
- { int ch = lookChar(); ++index; return ch; }
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- int c[5];
- int b[4];
- int index, n;
- GBool eof;
-};
-
-//------------------------------------------------------------------------
-// LZWStream
-//------------------------------------------------------------------------
-
-class LZWStream: public FilterStream {
-public:
-
- LZWStream(Stream *strA, int predictor, int columns, int colors,
- int bits, int earlyA);
- virtual ~LZWStream();
- virtual StreamKind getKind() { return strLZW; }
- virtual void reset();
- virtual int getChar();
- virtual int lookChar();
- virtual int getRawChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- StreamPredictor *pred; // predictor
- int early; // early parameter
- GBool eof; // true if at eof
- int inputBuf; // input buffer
- int inputBits; // number of bits in input buffer
- struct { // decoding table
- int length;
- int head;
- Guchar tail;
- } table[4097];
- int nextCode; // next code to be used
- int nextBits; // number of bits in next code word
- int prevCode; // previous code used in stream
- int newChar; // next char to be added to table
- Guchar seqBuf[4097]; // buffer for current sequence
- int seqLength; // length of current sequence
- int seqIndex; // index into current sequence
- GBool first; // first code after a table clear
-
- GBool processNextCode();
- void clearTable();
- int getCode();
-};
-
-//------------------------------------------------------------------------
-// RunLengthStream
-//------------------------------------------------------------------------
-
-class RunLengthStream: public FilterStream {
-public:
-
- RunLengthStream(Stream *strA);
- virtual ~RunLengthStream();
- virtual StreamKind getKind() { return strRunLength; }
- virtual void reset();
- virtual int getChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
- virtual int lookChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- char buf[128]; // buffer
- char *bufPtr; // next char to read
- char *bufEnd; // end of buffer
- GBool eof;
-
- GBool fillBuf();
-};
-
-//------------------------------------------------------------------------
-// CCITTFaxStream
-//------------------------------------------------------------------------
-
-struct CCITTCodeTable;
-
-class CCITTFaxStream: public FilterStream {
-public:
-
- CCITTFaxStream(Stream *strA, int encodingA, GBool endOfLineA,
- GBool byteAlignA, int columnsA, int rowsA,
- GBool endOfBlockA, GBool blackA);
- virtual ~CCITTFaxStream();
- virtual StreamKind getKind() { return strCCITTFax; }
- virtual void reset();
- virtual int getChar()
- { int c = lookChar(); buf = EOF; return c; }
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- int encoding; // 'K' parameter
- GBool endOfLine; // 'EndOfLine' parameter
- GBool byteAlign; // 'EncodedByteAlign' parameter
- int columns; // 'Columns' parameter
- int rows; // 'Rows' parameter
- GBool endOfBlock; // 'EndOfBlock' parameter
- GBool black; // 'BlackIs1' parameter
- GBool eof; // true if at eof
- GBool nextLine2D; // true if next line uses 2D encoding
- int row; // current row
- int inputBuf; // input buffer
- int inputBits; // number of bits in input buffer
- short *refLine; // reference line changing elements
- int b1; // index into refLine
- short *codingLine; // coding line changing elements
- int a0; // index into codingLine
- int outputBits; // remaining ouput bits
- int buf; // character buffer
-
- short getTwoDimCode();
- short getWhiteCode();
- short getBlackCode();
- short lookBits(int n);
- void eatBits(int n) { inputBits -= n; }
-};
-
-//------------------------------------------------------------------------
-// DCTStream
-//------------------------------------------------------------------------
-
-// DCT component info
-struct DCTCompInfo {
- int id; // component ID
- int hSample, vSample; // horiz/vert sampling resolutions
- int quantTable; // quantization table number
- int prevDC; // DC coefficient accumulator
-};
-
-struct DCTScanInfo {
- GBool comp[4]; // comp[i] is set if component i is
- // included in this scan
- int numComps; // number of components in the scan
- int dcHuffTable[4]; // DC Huffman table numbers
- int acHuffTable[4]; // AC Huffman table numbers
- int firstCoeff, lastCoeff; // first and last DCT coefficient
- int ah, al; // successive approximation parameters
-};
-
-// DCT Huffman decoding table
-struct DCTHuffTable {
- Guchar firstSym[17]; // first symbol for this bit length
- Gushort firstCode[17]; // first code for this bit length
- Gushort numCodes[17]; // number of codes of this bit length
- Guchar sym[256]; // symbols
-};
-
-class DCTStream: public FilterStream {
-public:
-
- DCTStream(Stream *strA);
- virtual ~DCTStream();
- virtual StreamKind getKind() { return strDCT; }
- virtual void reset();
- virtual int getChar();
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
- Stream *getRawStream() { return str; }
-
-private:
-
- GBool progressive; // set if in progressive mode
- GBool interleaved; // set if in interleaved mode
- int width, height; // image size
- int mcuWidth, mcuHeight; // size of min coding unit, in data units
- int bufWidth, bufHeight; // frameBuf size
- DCTCompInfo compInfo[4]; // info for each component
- DCTScanInfo scanInfo; // info for the current scan
- int numComps; // number of components in image
- int colorXform; // need YCbCr-to-RGB transform?
- GBool gotJFIFMarker; // set if APP0 JFIF marker was present
- GBool gotAdobeMarker; // set if APP14 Adobe marker was present
- int restartInterval; // restart interval, in MCUs
- Guchar quantTables[4][64]; // quantization tables
- int numQuantTables; // number of quantization tables
- DCTHuffTable dcHuffTables[4]; // DC Huffman tables
- DCTHuffTable acHuffTables[4]; // AC Huffman tables
- int numDCHuffTables; // number of DC Huffman tables
- int numACHuffTables; // number of AC Huffman tables
- Guchar *rowBuf[4][32]; // buffer for one MCU (non-progressive mode)
- int *frameBuf[4]; // buffer for frame (progressive mode)
- int comp, x, y, dy; // current position within image/MCU
- int restartCtr; // MCUs left until restart
- int restartMarker; // next restart marker
- int eobRun; // number of EOBs left in the current run
- int inputBuf; // input buffer for variable length codes
- int inputBits; // number of valid bits in input buffer
-
- void restart();
- GBool readMCURow();
- void readScan();
- GBool readDataUnit(DCTHuffTable *dcHuffTable,
- DCTHuffTable *acHuffTable,
- int *prevDC, int data[64]);
- GBool readProgressiveDataUnit(DCTHuffTable *dcHuffTable,
- DCTHuffTable *acHuffTable,
- int *prevDC, int data[64]);
- void decodeImage();
- void transformDataUnit(Guchar *quantTable,
- int dataIn[64], Guchar dataOut[64]);
- int readHuffSym(DCTHuffTable *table);
- int readAmp(int size);
- int readBit();
- GBool readHeader();
- GBool readBaselineSOF();
- GBool readProgressiveSOF();
- GBool readScanInfo();
- GBool readQuantTables();
- GBool readHuffmanTables();
- GBool readRestartInterval();
- GBool readJFIFMarker();
- GBool readAdobeMarker();
- GBool readTrailer();
- int readMarker();
- int read16();
-};
-
-//------------------------------------------------------------------------
-// FlateStream
-//------------------------------------------------------------------------
-
-#define flateWindow 32768 // buffer size
-#define flateMask (flateWindow-1)
-#define flateMaxHuffman 15 // max Huffman code length
-#define flateMaxCodeLenCodes 19 // max # code length codes
-#define flateMaxLitCodes 288 // max # literal codes
-#define flateMaxDistCodes 30 // max # distance codes
-
-// Huffman code table entry
-struct FlateCode {
- Gushort len; // code length, in bits
- Gushort val; // value represented by this code
-};
-
-struct FlateHuffmanTab {
- FlateCode *codes;
- int maxLen;
-};
-
-// Decoding info for length and distance code words
-struct FlateDecode {
- int bits; // # extra bits
- int first; // first length/distance
-};
-
-class FlateStream: public FilterStream {
-public:
-
- FlateStream(Stream *strA, int predictor, int columns,
- int colors, int bits);
- virtual ~FlateStream();
- virtual StreamKind getKind() { return strFlate; }
- virtual void reset();
- virtual int getChar();
- virtual int lookChar();
- virtual int getRawChar();
- virtual GString *getPSFilter(int psLevel, char *indent);
- virtual GBool isBinary(GBool last = gTrue);
-
-private:
-
- StreamPredictor *pred; // predictor
- Guchar buf[flateWindow]; // output data buffer
- int index; // current index into output buffer
- int remain; // number valid bytes in output buffer
- int codeBuf; // input buffer
- int codeSize; // number of bits in input buffer
- int // literal and distance code lengths
- codeLengths[flateMaxLitCodes + flateMaxDistCodes];
- FlateHuffmanTab litCodeTab; // literal code table
- FlateHuffmanTab distCodeTab; // distance code table
- GBool compressedBlock; // set if reading a compressed block
- int blockLen; // remaining length of uncompressed block
- GBool endOfBlock; // set when end of block is reached
- GBool eof; // set when end of stream is reached
-
- static int // code length code reordering
- codeLenCodeMap[flateMaxCodeLenCodes];
- static FlateDecode // length decoding info
- lengthDecode[flateMaxLitCodes-257];
- static FlateDecode // distance decoding info
- distDecode[flateMaxDistCodes];
-
- void readSome();
- GBool startBlock();
- void loadFixedCodes();
- GBool readDynamicCodes();
- void compHuffmanCodes(int *lengths, int n, FlateHuffmanTab *tab);
- int getHuffmanCodeWord(FlateHuffmanTab *tab);
- int getCodeWord(int bits);
-};
-
-//------------------------------------------------------------------------
-// EOFStream
-//------------------------------------------------------------------------
-
-class EOFStream: public FilterStream {
-public:
-
- EOFStream(Stream *strA);
- virtual ~EOFStream();
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset() {}
- virtual int getChar() { return EOF; }
- virtual int lookChar() { return EOF; }
- virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
-};
-
-//------------------------------------------------------------------------
-// FixedLengthEncoder
-//------------------------------------------------------------------------
-
-class FixedLengthEncoder: public FilterStream {
-public:
-
- FixedLengthEncoder(Stream *strA, int lengthA);
- ~FixedLengthEncoder();
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset();
- virtual int getChar();
- virtual int lookChar();
- virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue);
- virtual GBool isEncoder() { return gTrue; }
-
-private:
-
- int length;
- int count;
-};
-
-//------------------------------------------------------------------------
-// ASCIIHexEncoder
-//------------------------------------------------------------------------
-
-class ASCIIHexEncoder: public FilterStream {
-public:
-
- ASCIIHexEncoder(Stream *strA);
- virtual ~ASCIIHexEncoder();
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset();
- virtual int getChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
- virtual int lookChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual GBool isEncoder() { return gTrue; }
-
-private:
-
- char buf[4];
- char *bufPtr;
- char *bufEnd;
- int lineLen;
- GBool eof;
-
- GBool fillBuf();
-};
-
-//------------------------------------------------------------------------
-// ASCII85Encoder
-//------------------------------------------------------------------------
-
-class ASCII85Encoder: public FilterStream {
-public:
-
- ASCII85Encoder(Stream *strA);
- virtual ~ASCII85Encoder();
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset();
- virtual int getChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
- virtual int lookChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual GBool isEncoder() { return gTrue; }
-
-private:
-
- char buf[8];
- char *bufPtr;
- char *bufEnd;
- int lineLen;
- GBool eof;
-
- GBool fillBuf();
-};
-
-//------------------------------------------------------------------------
-// RunLengthEncoder
-//------------------------------------------------------------------------
-
-class RunLengthEncoder: public FilterStream {
-public:
-
- RunLengthEncoder(Stream *strA);
- virtual ~RunLengthEncoder();
- virtual StreamKind getKind() { return strWeird; }
- virtual void reset();
- virtual int getChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
- virtual int lookChar()
- { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gTrue; }
- virtual GBool isEncoder() { return gTrue; }
-
-private:
-
- char buf[131];
- char *bufPtr;
- char *bufEnd;
- char *nextEnd;
- GBool eof;
-
- GBool fillBuf();
-};
-
-#endif
generated by cgit v0.9.1 at 2024-05-07 00:07:54 (GMT)