You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
//
|
|
/// @file ctype.hpp
|
|
/// @brief Simple implementations of character comparison functions.
|
|
//
|
|
// Alee Forth: A portable and concise Forth implementation in modern C++.
|
|
// Copyright (C) 2023 Clyne Sullivan <clyne@bitgloo.com>
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
#ifndef ALEEFORTH_CTYPE_HPP
|
|
#define ALEEFORTH_CTYPE_HPP
|
|
|
|
#include <cstdint>
|
|
|
|
/** Determines the length of a null-terminated string. */
|
|
constexpr inline unsigned strlen(const char * const s) {
|
|
unsigned i = 0;
|
|
while (s[i]) i++;
|
|
return i;
|
|
}
|
|
|
|
/** Tests if given character represents whitespace. */
|
|
constexpr inline bool isspace(uint8_t c) {
|
|
return c == ' ' || c == '\t' || c == '\r' || c == '\n';
|
|
}
|
|
|
|
/** Tests if given character is a numerical digit. */
|
|
constexpr inline bool isdigit(uint8_t c) {
|
|
return c >= '0' && c <= '9';
|
|
}
|
|
|
|
/** Tests if given character is an uppercase letter. */
|
|
constexpr inline bool isupper(uint8_t c) {
|
|
return c >= 'A' && c <= 'Z';
|
|
}
|
|
|
|
/** Tests if given character is a lowercase letter. */
|
|
constexpr inline bool islower(uint8_t c) {
|
|
return c >= 'a' && c <= 'z';
|
|
}
|
|
|
|
/** Tests if given character is a letter. */
|
|
constexpr inline bool isalpha(uint8_t c) {
|
|
return isupper(c) || (c >= 'a' && c <= 'z');
|
|
}
|
|
|
|
#endif // ALEEFORTH_CTYPE_HPP
|
|
|