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d139b4ff7c
Specifically we add * `gamma(a, b)`, which returns the magnitude of largest 1-ULP step in range [a, b]. * `count_equidistant_float(a, b, distance)`, which returns the number of equi-distant floats in range [a, b].
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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#include <catch2/internal/catch_floating_point_helpers.hpp>
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#include <cstring>
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namespace Catch {
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namespace Detail {
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uint32_t convertToBits(float f) {
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static_assert(sizeof(float) == sizeof(uint32_t), "Important ULP matcher assumption violated");
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uint32_t i;
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std::memcpy(&i, &f, sizeof(f));
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return i;
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}
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uint64_t convertToBits(double d) {
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static_assert(sizeof(double) == sizeof(uint64_t), "Important ULP matcher assumption violated");
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uint64_t i;
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std::memcpy(&i, &d, sizeof(d));
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return i;
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}
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#if defined( __GNUC__ ) || defined( __clang__ )
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wfloat-equal"
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#endif
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bool directCompare( float lhs, float rhs ) { return lhs == rhs; }
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bool directCompare( double lhs, double rhs ) { return lhs == rhs; }
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#if defined( __GNUC__ ) || defined( __clang__ )
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# pragma GCC diagnostic pop
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#endif
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} // end namespace Detail
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} // end namespace Catch
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