Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Stream.h') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/Stream.h | 113 |
1 files changed, 95 insertions, 18 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Stream.h b/noncore/unsupported/qpdf/xpdf/Stream.h index 1f9c561..3319dcc 100644 --- a/noncore/unsupported/qpdf/xpdf/Stream.h +++ b/noncore/unsupported/qpdf/xpdf/Stream.h @@ -1,11 +1,11 @@ //======================================================================== // // Stream.h // -// Copyright 1996 Derek B. Noonburg +// Copyright 1996-2002 Glyph & Cog, LLC // //======================================================================== #ifndef STREAM_H #define STREAM_H @@ -75,14 +75,16 @@ public: // 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. - virtual void setPos(int pos) = 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(char *indent); // Does this stream type potentially contain non-printable chars? virtual GBool isBinary(GBool last = gTrue) = 0; @@ -115,24 +117,26 @@ private: class BaseStream: public Stream { public: BaseStream(Object *dictA); virtual ~BaseStream(); - virtual Stream *makeSubStream(int start, int length, Object *dict) = 0; - virtual void setPos(int pos) = 0; + virtual Stream *makeSubStream(Guint start, GBool limited, + Guint length, Object *dict) = 0; + virtual void setPos(Guint pos, int dir = 0) = 0; virtual BaseStream *getBaseStream() { return this; } virtual Dict *getDict() { return dict.getDict(); } // Get/set position of first byte of stream within the file. - virtual int getStart() = 0; + virtual Guint getStart() = 0; virtual void moveStart(int delta) = 0; #ifndef NO_DECRYPTION // Set decryption for this stream. - void doDecryption(Guchar *fileKey, int keyLength, int objNum, int objGen); + virtual void doDecryption(Guchar *fileKey, int keyLength, + int objNum, int objGen); #endif #ifndef NO_DECRYPTION protected: Decrypt *decrypt; @@ -153,13 +157,13 @@ class FilterStream: public Stream { public: FilterStream(Stream *strA); virtual ~FilterStream(); virtual void close(); virtual int getPos() { return str->getPos(); } - virtual void setPos(int pos); + virtual void setPos(Guint pos, int dir = 0); virtual BaseStream *getBaseStream() { return str->getBaseStream(); } virtual Dict *getDict() { return str->getDict(); } protected: Stream *str; @@ -239,40 +243,81 @@ private: #define fileStreamBufSize 256 class FileStream: public BaseStream { public: - FileStream(FILE *fA, int startA, int lengthA, Object *dictA); + FileStream(FILE *fA, Guint startA, GBool limitedA, + Guint lengthA, Object *dictA); virtual ~FileStream(); - virtual Stream *makeSubStream(int startA, int lengthA, Object *dictA); + 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(int pos); + virtual void setPos(Guint pos, int dir = 0); virtual GBool isBinary(GBool last = gTrue) { return last; } - virtual int getStart() { return start; } + virtual Guint getStart() { return start; } virtual void moveStart(int delta); private: GBool fillBuf(); FILE *f; - int start; - int length; + Guint start; + GBool limited; + Guint length; char buf[fileStreamBufSize]; char *bufPtr; char *bufEnd; - int bufPos; + Guint bufPos; int savePos; + GBool saved; +}; + +//------------------------------------------------------------------------ +// MemStream +//------------------------------------------------------------------------ + +class MemStream: public BaseStream { +public: + + MemStream(char *bufA, 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 bufPtr - buf; } + virtual void setPos(Guint pos, int dir = 0); + virtual GBool isBinary(GBool last = gTrue) { return last; } + virtual Guint getStart() { return 0; } + virtual void moveStart(int delta); +#ifndef NO_DECRYPTION + virtual void doDecryption(Guchar *fileKey, int keyLength, + int objNum, int objGen); +#endif + +private: + + char *buf; + Guint length; + GBool needFree; + char *bufEnd; + char *bufPtr; }; //------------------------------------------------------------------------ // EmbedStream // // This is a special stream type used for embedded streams (inline @@ -284,21 +329,22 @@ private: class EmbedStream: public BaseStream { public: EmbedStream(Stream *strA, Object *dictA); virtual ~EmbedStream(); - virtual Stream *makeSubStream(int start, int length, Object *dictA); + virtual Stream *makeSubStream(Guint start, GBool limited, + Guint length, Object *dictA); virtual StreamKind getKind() { return str->getKind(); } virtual void reset() {} virtual int getChar() { return str->getChar(); } virtual int lookChar() { return str->lookChar(); } virtual int getPos() { return str->getPos(); } - virtual void setPos(int pos); + virtual void setPos(Guint pos, int dir = 0); virtual GBool isBinary(GBool last = gTrue) { return last; } - virtual int getStart(); + virtual Guint getStart(); virtual void moveStart(int delta); private: Stream *str; }; @@ -656,12 +702,43 @@ 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 void close(); + virtual int getChar() + { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); } + virtual int lookChar() + { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); } + virtual GString *getPSFilter(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: |