mango/libc/ctype/ctype.c

/*
 *  asbestOS: The best operating system ever made.
 *  Copyright (C) 2017 Max Wash
 *
 *  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/>.
 */
#include <stdbool.h>
#include <stdint.h>

int isupper(int c)
{
	return (c >= 65 && c <= 90);
}

int islower(int c)
{
	return (c >= 97 && c <= 122);
}

int toupper(int c)
{
	if (!islower(c)) {
		return c;
	}

	return c - 32;
}

int tolower(int c)
{
	if (!isupper(c)) {
		return c;
	}

	return c + 32;
}

int isdigit(int c)
{
	return (c >= 48 && c <= 57);
}

int isalpha(int c)
{
	return (c >= 65 && c <= 90) || (c >= 97 && c <= 122);
}

int isalnum(int c)
{
	return isalpha(c) | isdigit(c);
}

int iscntrl(int c)
{
	return (c <= 31) || (c == 127);
}

int isprint(int c)
{
	return (c >= 32 && c <= 126) || (c >= 128 && c <= 254);
}

int isgraph(int c)
{
	return isprint(c) && c != 32;
}

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

int isspace(int c)
{
	return (c == ' ') || (c == '\t') || (c == '\n') || (c == '\v')
	    || (c == '\f') || (c == '\r');
}

int isxdigit(int c)
{
	return isdigit(c) || (c >= 65 && c <= 70) || (c >= 97 && c <= 102);
}