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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* Additional copyright for this file:
* Copyright (C) 1995-1997 Presto Studios, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef PEGASUS_UTIL_H
#define PEGASUS_UTIL_H
#include "common/stream.h"
#include "pegasus/types.h"
namespace Common {
class RandomSource;
}
namespace Pegasus {
class IDObject {
public:
IDObject(const tMM32BitID id);
~IDObject();
tMM32BitID getObjectID() const;
private:
tMM32BitID _objectID;
};
class FunctionPtr;
typedef void (*tFunctionPtr)(FunctionPtr *theFunction, void *functionArg);
class FunctionPtr {
public:
FunctionPtr();
virtual ~FunctionPtr();
void setFunctionPtr(tFunctionPtr function, void *functionArg);
protected:
void callFunction();
tFunctionPtr _function;
void *_functionArg;
};
#define NUM_FLAGS (sizeof(Unit) * 8)
#define BIT_INDEX_SHIFT (sizeof(Unit) + 2 - (sizeof(Unit)) / 3)
#define BIT_INDEX_MASK (NUM_FLAGS - 1)
template <typename Unit, uint32 kNumFlags>
class FlagsArray {
public:
FlagsArray() { clearAllFlags(); }
void clearAllFlags() { memset(_flags, 0, sizeof(_flags)); }
void setAllFlags() { memset(_flags, ~((Unit)0), sizeof(_flags)); }
void setFlag(uint32 flag) { _flags[flag >> BIT_INDEX_SHIFT] |= 1 << (flag & BIT_INDEX_MASK); }
void clearFlag(uint32 flag) { _flags[flag >> BIT_INDEX_SHIFT] &= ~(1 << (flag & BIT_INDEX_MASK)); }
void setFlag(uint32 flag, bool val) { if (val) setFlag(flag); else clearFlag(flag); }
bool getFlag(uint32 flag) { return (_flags[flag >> BIT_INDEX_SHIFT] & (1 << (flag & BIT_INDEX_MASK))) != 0; }
bool anyFlagSet() {
for (uint32 i = 0; i < sizeof(_flags); i++)
if (_flags[i] != 0)
return true;
return false;
}
void readFromStream(Common::ReadStream *stream) {
// Shortcut
if (sizeof(Unit) == 1) {
stream->read(_flags, sizeof(_flags));
return;
}
for (uint32 i = 0; i < ARRAYSIZE(_flags); i++) {
if (sizeof(Unit) == 2)
_flags[i] = stream->readUint16BE();
else /* if (sizeof(Unit) == 4) */
_flags[i] = stream->readUint32BE();
}
}
void writeToStream(Common::WriteStream *stream) {
// Shortcut
if (sizeof(Unit) == 1) {
stream->write(_flags, sizeof(_flags));
return;
}
for (uint32 i = 0; i < ARRAYSIZE(_flags); i++) {
if (sizeof(Unit) == 2)
stream->writeUint16BE(_flags[i]);
else /* if (sizeof(Unit) == 4) */
stream->writeUint32BE(_flags[i]);
}
}
private:
Unit _flags[(kNumFlags - 1) / NUM_FLAGS + 1];
};
#undef NUM_FLAGS;
#undef BIT_INDEX_SHIFT
#undef BIT_INDEX_MASK
int32 linearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2);
void shuffleArray(int32 *arr, int32 count, Common::RandomSource &random);
int32 pegasusRound(const int32 a, const int32 b);
} // End of namespace Pegasus
#endif
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