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53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* This code is based on original Mortville Manor DOS source code
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* Copyright (c) 1988-1989 Lankhor
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*/
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#include "common/scummsys.h"
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namespace Mortevielle {
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/**
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* Decodes a number of 64 byte blocks
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* @param pStart Start of data
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* @param count Number of 64 byte blocks
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*/
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void zzuul(byte *pStart, int count) {
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while (count-- > 0) {
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for (int idx = 0; idx < 64; ++pStart, ++idx) {
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uint16 v = ((*pStart - 0x80) << 1) + 0x80;
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if (v & 0x8000)
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*pStart = 0;
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else if (v & 0xff00)
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*pStart = 0xff;
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else
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*pStart = (byte)v;
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}
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}
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}
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} // End of namespace Mortevielle
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