/* SPDX-License-Identifier: BSD-3-Clause */
/* See the end of this file for copyright, licensing, and warranty information. */

#include <ctype.h>

int isalpha(int c)
{
	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}

int isblank(int c)
{
	return c == ' ' || c == '\t';
}

int iscntrl(int c)
{
	return c == 0x7F || (c >= 0 && c <= 0x1F);
}

int isdigit(int c)
{
	return c >= '0' && c <= '9';
}

int isgraph(int c)
{
	/* space *not* included */
	return c > 0x20 && c <= 0x7E;
}

int islower(int c)
{
	return c >= 'a' && c <= 'z';
}

int isprint(int c)
{
	/* space *is* included */
	return c >= 0x20 && c <= 0x7E;
}

int ispunct(int c)
{
	return isprint(c) && !isalnum(c);
}

int isspace(int c)
{
	return c == ' ' || (c >= '\n' && c <= '\r');
}

int isupper(int c)
{
	return c >= 'A' && c <= 'Z';
}

int isxdigit(int c)
{
	return (c >= '0' && c <= '9')
		|| (c >= 'A' && c <= 'F')
		|| (c >= 'a' && c <= 'f');
}

int isascii(int c)
{
	return c & 0x7F;
}

/*
 * Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors may be
 *    used to endorse or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */