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/* This file is part of KDVI (C) 2001 by Stefan Kebekus (kebekus@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
*/
/**
* Byte reading routines which read big endian numbers from memory and
* convert them to native integers.
*
* @author Stefan Kebekus (kebekus@kde.org)
*
**/
#ifndef _bigEndianByteReader_H
#define _bigEndianByteReader_H
#include <tqglobal.h>
class bigEndianByteReader {
public:
/** Set this pointer to the location where the number resides which
you want to read. */
TQ_UINT8 * command_pointer;
/** This pointer marks the end of the memory area where bytes can be
read. It should point to the first byte which CANNOT be
read. The idea is to have a safety net which protects us against
SEGFAULTs. This is also used in virtual fonts, where the macro
does not have an EOP command at the end of the macro. */
TQ_UINT8 * end_pointer;
/** If command_pointer >= end_pointer, this method return EOP (=140)
and exists. Otherwise, the method returns the unsigned byte
and increases the command_pointer by one. */
TQ_UINT8 readUINT8();
/** Similar to the method above, only that the method reads a big
endian 2-byte word and increases the pointer by two. */
TQ_UINT16 readUINT16();
/** Similar to the method above, only that the method reads a big
endian 4-byte word and increases the pointer by four. */
TQ_UINT32 readUINT32();
void writeUINT32(TQ_UINT32 a);
/** Similar to the method above, only that the method reads a big
endian number of length size, where 1 <= size <= 4. Note that
the value 3 is allowed (and is acually used in DVI files)!!! */
TQ_UINT32 readUINT(TQ_UINT8 size);
/** Similar to the method above, only that the method reads a SIGNED
number */
TQ_INT32 readINT(TQ_UINT8);
};
#endif //ifndef _bigEndianByteReader_H
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