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