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71 lines
1.8 KiB
C++
71 lines
1.8 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef DOUBLE_SERIALIZATION_H
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#define DOUBLE_SERIALIZATION_H
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#include "common/types.h"
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/**
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* @defgroup lua_ds Double serialization
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* @ingroup lua
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*
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* @brief Functions for encoding and decoding double values.
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*
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* @{
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*/
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namespace Util {
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struct SerializedDouble {
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uint32 significandOne;
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uint32 signAndSignificandTwo;
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int16 exponent;
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};
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struct CompactSerializedDouble {
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uint32 signAndSignificandOne;
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uint32 exponentAndSignificandTwo;
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};
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/**
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* Encodes a double as two uint32 and a one int16
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*
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* Supports denormalized numbers. Does NOT support NaN, or Inf
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*
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* @param value The value to encode
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* @return The encoded value
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*/
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SerializedDouble encodeDouble(double value);
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/**
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* Decodes a previously encoded double
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*
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* @param value The value to decode
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* @return The decoded value
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*/
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double decodeDouble(SerializedDouble value);
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} // End of namespace Util
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/** @} */
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#endif
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