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/*
* Copyright (C) 2023 Apple Inc. 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
* OWNER 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.
*/
/*
* License header from dragonbox
* https://github.com/jk-jeon/dragonbox/blob/master/LICENSE-Boost
* https://github.com/jk-jeon/dragonbox/blob/master/LICENSE-Apache2-LLVM
*/
#pragma once
namespace WTF {
namespace dragonbox {
////////////////////////////////////////////////////////////////////////////////////////
// Return types for the main interface function.
////////////////////////////////////////////////////////////////////////////////////////
template<class UInt, bool is_signed, bool trailing_zero_flag>
struct decimal_fp;
template<class UInt>
struct decimal_fp<UInt, false, false> {
using carrier_uint = UInt;
carrier_uint significand;
int32_t exponent;
};
template<class UInt>
struct decimal_fp<UInt, true, false> {
using carrier_uint = UInt;
carrier_uint significand;
int32_t exponent;
bool is_negative;
};
template<class UInt>
struct decimal_fp<UInt, false, true> {
using carrier_uint = UInt;
carrier_uint significand;
int32_t exponent;
bool may_have_trailing_zeros;
};
template<class UInt>
struct decimal_fp<UInt, true, true> {
using carrier_uint = UInt;
carrier_uint significand;
int32_t exponent;
bool may_have_trailing_zeros;
bool is_negative;
};
template<class UInt, bool trailing_zero_flag = false>
using unsigned_decimal_fp = decimal_fp<UInt, false, trailing_zero_flag>;
template<class UInt, bool trailing_zero_flag = false>
using signed_decimal_fp = decimal_fp<UInt, true, trailing_zero_flag>;
template<class UInt>
constexpr signed_decimal_fp<UInt, false>
add_sign_to_unsigned_decimal_fp(bool is_negative, unsigned_decimal_fp<UInt, false> r) noexcept
{
return { r.significand, r.exponent, is_negative };
}
template<class UInt>
constexpr signed_decimal_fp<UInt, true>
add_sign_to_unsigned_decimal_fp(bool is_negative, unsigned_decimal_fp<UInt, true> r) noexcept
{
return { r.significand, r.exponent, r.may_have_trailing_zeros, is_negative };
}
namespace detail {
template<class UnsignedDecimalFp>
struct unsigned_decimal_fp_to_signed;
template<class UInt, bool trailing_zero_flag>
struct unsigned_decimal_fp_to_signed<unsigned_decimal_fp<UInt, trailing_zero_flag>> {
using type = signed_decimal_fp<UInt, trailing_zero_flag>;
};
template<class UnsignedDecimalFp>
using unsigned_decimal_fp_to_signed_t = typename unsigned_decimal_fp_to_signed<UnsignedDecimalFp>::type;
} // namespace detail
} // namespace dragonbox
} // namespace WTF
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