GU/GU_FontStream.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Thomas Lai
 *      Side Effects Software Inc.
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      M5V 3E7
 *      Canada
 *      416-504-9876
 * 
 * NAME:        GU_FontStream.h (C++)
 * 
 * COMMENTS:    Reads in a stream to buffer for quick access when interpreting
 *              fonts and building text.  Also does necessary decryption for
 *              PostScript Type 1 font.
 *
 */

#ifndef __GU_FontStream_h__
#define __GU_FontStream_h__

#include "GU_API.h"
#include <iostream.h>
#include "GU_Font.h"

class GU_API GU_FontStream {
public:
    char        *load(UT_IStream &is);
    int          get(char &c)   {       
                                    if (idx < size) 
                                    {
                                        c = p[idx++]; return 1;
                                    }
                                    else return 0;
                                };

    void         put(char c)    { if (idx) p[--idx] = c; };

    void         eexecDecode(void);
    void         decodeByte(char &plain, unsigned short &key);

    GU_FONT_TYPE getFontType(void) { return myFontType; };
    GU_Font     *allocateFont();

private:

    char        *p;
    int          idx, size, macLength;

    char         myAsciiFlag;
    char         myMacFlag;

    void         checkAscii(void);      // determine ascii/binary
    void         getMacLength(void);
    int          readHexPair(char &result);

    GU_FONT_TYPE         myFontType;
    GU_Font             *myFont;
};


#endif

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