93 lines
2.1 KiB
C++
93 lines
2.1 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2016 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __CRUFT_UTIL_ASCII_HPP
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#define __CRUFT_UTIL_ASCII_HPP
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#include "./annotation.hpp"
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#include <cstdint>
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#include <stdexcept>
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namespace util { namespace ascii {
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///////////////////////////////////////////////////////////////////////////
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constexpr inline
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bool
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is_digit (char c) noexcept
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{
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return c >= '0' && c <= '9';
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}
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//-------------------------------------------------------------------------
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constexpr inline
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uint8_t
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to_integer (char c)
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{
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return likely (is_digit (c)) ?
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c - '0'
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: throw std::invalid_argument ("character is not a digit");
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}
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//-------------------------------------------------------------------------
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constexpr inline
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bool
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is_upper (char c) noexcept
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{
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return c >= 'A' && c <= 'Z';
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}
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///////////////////////////////////////////////////////////////////////////
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constexpr inline
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char
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to_upper (char c) noexcept
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{
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return c - 'a' + 'A';
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}
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//-------------------------------------------------------------------------
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constexpr inline
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char
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to_lower (char c) noexcept
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{
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return c - 'A' + 'a';
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}
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///////////////////////////////////////////////////////////////////////////
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constexpr inline
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bool
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is_space (char c)
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{
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switch (c) {
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case ' ':
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case '\f':
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case '\n':
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case '\r':
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case '\t':
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case '\v':
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return true;
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default:
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return false;
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}
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}
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} }
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#endif
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