/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * 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.
 *
 * 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.
 */

#pragma once

#include <sys/cdefs.h>

__BEGIN_DECLS

/* Do what newlib does to appease GCC's --with-newlib option. */
#define _U 01
#define _L 02
#define _N 04
#define _S 010
#define _P 020
#define _C 040
#define _X 0100
#define _B 0200

extern const char _ctype_[256];

int tolower(int);
int toupper(int);

static inline int isalnum(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_U | _L | _N));
}

static inline int isalpha(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_U | _L));
}

static inline int iscntrl(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_C));
}

static inline int isdigit(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_N));
}

static inline int isxdigit(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_N | _X));
}

static inline int isspace(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_S));
}

static inline int ispunct(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_P));
}

static inline int isprint(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_P | _U | _L | _N | _B));
}

static inline int isgraph(int c)
{
    return (_ctype_[(unsigned char)(c)] & (_P | _U | _L | _N));
}

static inline int islower(int c)
{
    return ((_ctype_[(unsigned char)(c)] & (_U | _L)) == _L);
}

static inline int isupper(int c)
{
    return ((_ctype_[(unsigned char)(c)] & (_U | _L)) == _U);
}

#define isascii(c) ((unsigned)c <= 127)
#define toascii(c) ((c)&127)

__END_DECLS