/*

Copyright (C) 2017-2026 Topological Manifold

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

#pragma once

#include <algorithm>

#include <type_traits>

namespace ns::ascii

{

constexpr char to_upper(const char c)

{

return c - static_cast<char>(32);

}

constexpr char to_lower(const char c)

{

return c + static_cast<char>(32);

}

constexpr bool is_space(const char c)

{

return c == ' ' || (c <= '\x0d' && c >= '\x09');

}

constexpr bool is_not_space(const char c)

{

return !is_space(c);

}

constexpr bool is_blank(const char c)

{

return c == ' ' || c == '\t';

}

constexpr bool is_not_blank(const char c)

{

return !is_blank(c);

}

constexpr bool is_not_new_line(const char c)

{

return c != '\n';

}

constexpr bool is_digit(const char c)

{

return c >= '0' && c <= '9';

}

constexpr bool is_print(const char c)

{

return c >= '\x20' && c <= '\x7e';

}

constexpr int char_to_int(const char c)

{

return c - '0';

}

template <typename T>

bool is_ascii(const T& s)

{

static_assert(std::is_same_v<std::remove_cvref_t<typename T::value_type>, char>);

return std::all_of(

s.cbegin(), s.cend(),

[](const char c)

{

return static_cast<char8_t>(c) <= 0x7F;

});

}

}