#ifndef	_CTYPE_H
#define	_CTYPE_H

#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

int   isalnum(int);
int   isblank(int);
int   iscntrl(int);
int   ispunct(int);
int   isxdigit(int);
int   tolower(int);
int   toupper(int);

static __inline int __isspace(int _c)
{
	return _c == ' ' || (unsigned)_c-'\t' < 5;
}

__inline int isalpha(int _c)
{
	return (((unsigned)_c | 32) - 'a') < 26;
}

__inline int isdigit(int _c)
{
	return ((unsigned)_c - '0') < 10;
}

__inline int islower(int _c)
{
	return ((unsigned)_c - 'a') < 26;
}

__inline int isupper(int _c)
{
	return ((unsigned)_c - 'A') < 26;
}

__inline int isprint(int _c)
{
	return ((unsigned)_c - 0x20) < 0x5f;
}

__inline int isgraph(int _c)
{
	return ((unsigned)_c - 0x21) < 0x5e;
}

__inline int isspace(int _c)
{
	return __isspace(_c);
}

#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
 || defined(_BSD_SOURCE)

#define __NEED_locale_t
#include <bits/alltypes.h>

int   isalnum_l(int, locale_t);
int   isalpha_l(int, locale_t);
int   isblank_l(int, locale_t);
int   iscntrl_l(int, locale_t);
int   isdigit_l(int, locale_t);
int   isgraph_l(int, locale_t);
int   islower_l(int, locale_t);
int   isprint_l(int, locale_t);
int   ispunct_l(int, locale_t);
int   isspace_l(int, locale_t);
int   isupper_l(int, locale_t);
int   isxdigit_l(int, locale_t);
int   tolower_l(int, locale_t);
int   toupper_l(int, locale_t);

int   isascii(int);
int   toascii(int);
#define _tolower(a) ((a)|0x20)
#define _toupper(a) ((a)&0x5f)

#endif

#ifdef __cplusplus
}
#endif

#endif