mirror of
https://invent.kde.org/graphics/okular
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60 lines
2 KiB
C++
60 lines
2 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
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/* This file is part of KDVI
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SPDX-FileCopyrightText: 2001 Stefan Kebekus (kebekus@kde.org)
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SPDX-License-Identifier: GPL-2.0-or-later
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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 <QGlobalStatic>
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class bigEndianByteReader
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{
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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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quint8 *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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quint8 *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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quint8 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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quint16 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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quint32 readUINT32();
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void writeUINT32(quint32 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 actually used in DVI files)!!! */
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quint32 readUINT(quint8 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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qint32 readINT(quint8);
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};
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#endif // ifndef _bigEndianByteReader_H
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