mirror of
https://github.com/libretro/scummvm.git
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118 lines
3.2 KiB
C++
118 lines
3.2 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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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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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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#ifndef PEGASUS_UTIL_H
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#define PEGASUS_UTIL_H
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#include "common/stream.h"
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#include "pegasus/types.h"
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namespace Common {
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class RandomSource;
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}
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namespace Pegasus {
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class IDObject {
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public:
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IDObject(const int32 id);
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~IDObject();
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int32 getObjectID() const;
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private:
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int32 _objectID;
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};
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#define NUM_FLAGS (sizeof(Unit) * 8)
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#define BIT_INDEX_SHIFT (sizeof(Unit) + 2 - (sizeof(Unit)) / 3)
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#define BIT_INDEX_MASK (NUM_FLAGS - 1)
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template <typename Unit, uint32 kNumFlags>
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class FlagsArray {
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public:
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FlagsArray() { clearAllFlags(); }
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void clearAllFlags() { memset(_flags, 0, sizeof(_flags)); }
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void setAllFlags() { memset(_flags, ~((Unit)0), sizeof(_flags)); }
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void setFlag(uint32 flag) { _flags[flag >> BIT_INDEX_SHIFT] |= 1 << (flag & BIT_INDEX_MASK); }
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void clearFlag(uint32 flag) { _flags[flag >> BIT_INDEX_SHIFT] &= ~(1 << (flag & BIT_INDEX_MASK)); }
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void setFlag(uint32 flag, bool val) { if (val) setFlag(flag); else clearFlag(flag); }
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bool getFlag(uint32 flag) { return (_flags[flag >> BIT_INDEX_SHIFT] & (1 << (flag & BIT_INDEX_MASK))) != 0; }
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bool anyFlagSet() {
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for (uint32 i = 0; i < sizeof(_flags); i++)
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if (_flags[i] != 0)
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return true;
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return false;
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}
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void readFromStream(Common::ReadStream *stream) {
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// Shortcut
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if (sizeof(Unit) == 1) {
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stream->read(_flags, sizeof(_flags));
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return;
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}
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for (uint32 i = 0; i < ARRAYSIZE(_flags); i++) {
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if (sizeof(Unit) == 2)
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_flags[i] = stream->readUint16BE();
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else /* if (sizeof(Unit) == 4) */
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_flags[i] = stream->readUint32BE();
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}
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}
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void writeToStream(Common::WriteStream *stream) {
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// Shortcut
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if (sizeof(Unit) == 1) {
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stream->write(_flags, sizeof(_flags));
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return;
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}
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for (uint32 i = 0; i < ARRAYSIZE(_flags); i++) {
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if (sizeof(Unit) == 2)
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stream->writeUint16BE(_flags[i]);
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else /* if (sizeof(Unit) == 4) */
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stream->writeUint32BE(_flags[i]);
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}
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}
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private:
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Unit _flags[(kNumFlags - 1) / NUM_FLAGS + 1];
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};
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#undef NUM_FLAGS
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#undef BIT_INDEX_SHIFT
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#undef BIT_INDEX_MASK
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int32 linearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2);
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int32 pegasusRound(const int32 a, const int32 b);
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uint32 tickCount();
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} // End of namespace Pegasus
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#endif
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