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BaseTypes.h
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74 lines (67 loc) · 2.67 KB
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/**
* @file
* Type conversion routines
* @copyright
* syn
* Copyright (c) 2013-2017, Joshua Scoggins and Contributors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYN_TYPES_H
#define _SYN_TYPES_H
#include <cstdint>
#include <climits>
using int8 = int8_t;
using uint8 = uint8_t;
using byte = uint8_t;
using int16 = int16_t;
using uint16 = uint16_t;
using int32 = int32_t;
using uint32 = uint32_t;
using int64 = int64_t;
using uint64 = uint64_t;
// lock into gcc and other targets which have access to 128-bit integers
using int128 = __int128;
using uint128 = unsigned __int128;
namespace syn {
/**
* Retrieve the number of bits that a given type consumes. This is different
* from plain sizeof in that this is CHAR_BIT * the number of bytes that make
* up the target type.
* @tparam T the type to find the size of
*/
template<typename T>
constexpr auto bitwidth = CHAR_BIT * sizeof(T);
/**
* A little hack used to support int128 and anything other numeric constants by defining a constant one for a given
* type.
* @tparam T the type to coerce the number one into
*/
template<typename T>
constexpr auto numeralOne = static_cast<T>(0x1);
/**
* Retrieve the number of positions that a given type can shift left and right by without clearing all digits
* @tparam T the type of the thing
*/
template<typename T>
constexpr auto largestShiftValue = bitwidth<T> - 1;
} // end namespace syn
#endif // end _SYN_BASE_H