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Diffstat (limited to 'engines/pegasus/util.h')
-rw-r--r-- | engines/pegasus/util.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/engines/pegasus/util.h b/engines/pegasus/util.h new file mode 100644 index 0000000000..57839fca7b --- /dev/null +++ b/engines/pegasus/util.h @@ -0,0 +1,135 @@ +/* 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 int32 id); + ~IDObject(); + + int32 getObjectID() const; + +private: + int32 _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); + +int32 pegasusRound(const int32 a, const int32 b); + +uint32 tickCount(); + +} // End of namespace Pegasus + +#endif |