Mike Kaganski
e18a815190
Since some code needs flexibility in error handling, where hardcoded error value of -1 wasn't handy, o3tl::convertToHex was changed to accept the error value as its template parameter. Change-Id: Ifc771cc8fa29a801d4556dea969fc3ea7e620df5 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/199367 Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com> Tested-by: Jenkins
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <bit>
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#include <stdexcept>
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#include <o3tl/concepts.hxx>
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namespace o3tl
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{
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struct divide_by_zero final : public std::runtime_error
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{
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explicit divide_by_zero()
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: std::runtime_error("divide by zero")
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{
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}
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};
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template <o3tl::integral T, T error = T(-1), o3tl::integral U>
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constexpr T convertToHex(U aChar)
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{
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if (aChar >= '0' && aChar <= '9')
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return T(aChar - '0');
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else if (aChar >= 'a' && aChar <= 'f')
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return T(aChar - 'a' + 10);
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else if (aChar >= 'A' && aChar <= 'F')
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return T(aChar - 'A' + 10);
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return error;
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}
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template <o3tl::integral T, T error = T(-1), o3tl::integral U>
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constexpr T convertToHex(U cHigh, U cLow)
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{
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return (o3tl::convertToHex<T, error>(cHigh) << 4) | o3tl::convertToHex<T, error>(cLow);
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}
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template <o3tl::integral T>
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constexpr unsigned int number_of_bits(T x)
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{
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return sizeof(T) * 8 - std::countl_zero(x);
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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