#ifndef __CTYPE_H__
#define __CTYPE_H__

#include <stddef.h>

extern byte toupper(byte);
extern byte tolower(byte);

extern byte _ctype[ 257 ];

int isalnum (int __c);
int isalpha (int __c);
int iscntrl (int __c);
int isdigit (int __c);
int isgraph (int __c);
int islower (int __c);
int isprint (int __c);
int ispunct (int __c);
int isspace (int __c);
int isupper (int __c);
int isxdigit(int __c);
int isascii (int __c);

#define _IS_SP     1           /* space */
#define _IS_DIG    2           /* digit */
#define _IS_UPP    4           /* upper case */
#define _IS_LOW    8           /* lower case */
#define _IS_HEX   16           /* [0..9] or [A-F] or [a-f] */
#define _IS_CTL   32           /* control */
#define _IS_PUN   64           /* punctuation */
#define _IS_BLK  128           /* blank */

#define _IS_ALPHA    (_IS_UPP | _IS_LOW)
#define _IS_ALNUM    (_IS_DIG | _IS_ALPHA)
#define _IS_GRAPH    (_IS_ALNUM | _IS_HEX | _IS_PUN)

#define isalnum(c)   (_ctype[ (c)+1 ] & (_IS_ALNUM))

#define isalpha(c)   (_ctype[ (c)+1 ] & (_IS_ALPHA))

#define iscntrl(c)   (_ctype[ (c)+1 ] & (_IS_CTL))

#define isdigit(c)   (_ctype[ (c)+1 ] & (_IS_DIG))

#define isgraph(c)   (_ctype[ (c)+1 ] & (_IS_GRAPH))

#define islower(c)   (_ctype[ (c)+1 ] & (_IS_LOW))

#define isprint(c)   (_ctype[ (c)+1 ] & (_IS_GRAPH | _IS_BLK))

#define ispunct(c)   (_ctype[ (c)+1 ] & (_IS_PUN))

#define isspace(c)   (_ctype[ (c)+1 ] & (_IS_SP))

#define isupper(c)   (_ctype[ (c)+1 ] & (_IS_UPP))

#define isxdigit(c)  (_ctype[ (c)+1 ] & (_IS_HEX))

#define isascii(c)  ((unsigned)(c) < 128)

#define toascii(c)  ((c) & 0x7f)

#endif