88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
#ifndef OSMIUM_UTIL_MISC_HPP
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#define OSMIUM_UTIL_MISC_HPP
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/*
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This file is part of Osmium (https://osmcode.org/libosmium).
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Copyright 2013-2023 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <cassert>
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#include <cerrno>
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#include <cstdlib>
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#include <limits>
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#include <stdexcept>
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#include <tuple>
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#include <type_traits>
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namespace osmium {
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/**
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* Like std::tie(), but takes its arguments as const references. Used
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* as a helper function when sorting.
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*/
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template <typename... Ts>
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inline std::tuple<const Ts&...>
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const_tie(const Ts&... args) noexcept {
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return std::tuple<const Ts&...>(args...);
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}
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namespace detail {
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/**
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* Interpret the input string as number. Leading white space is
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* ignored. If there is any error, return 0.
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*
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* @tparam TReturn The return type.
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* @param str The input string.
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*
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* @pre @code str != nullptr @endcode
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*
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*/
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template <typename TReturn>
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inline TReturn str_to_int(const char* str) {
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static_assert(std::is_integral<TReturn>::value, "Must be integral type");
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using r_type = typename std::conditional<std::is_unsigned<TReturn>::value, unsigned long long, long long>::type; // NOLINT(google-runtime-int)
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assert(str);
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char* end = nullptr;
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const auto value = std::strtoll(str, &end, 10);
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if (value < 0 || value == std::numeric_limits<long long>::max() || static_cast<r_type>(value) >= std::numeric_limits<TReturn>::max() || end == nullptr || *end != '\0') { // NOLINT(google-runtime-int)
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return 0;
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}
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return static_cast<TReturn>(value);
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}
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} // namespace detail
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} // namespace osmium
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#endif // OSMIUM_UTIL_MISC_HPP
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