/*	$OpenBSD: cinfo.c,v 1.6 2001/05/23 23:29:47 mickey Exp $	*/

/*
 *		Character class tables.
 * Do it yourself character classification
 * macros, that understand the multinational character set,
 * and let me ask some questions the standard macros (in
 * ctype.h) don't let you ask.
 */
#include	"def.h"

/*
 * This table, indexed by a character drawn
 * from the 256 member character set, is used by my
 * own character type macros to answer questions about the
 * type of a character. It handles the full multinational
 * character set, and lets me ask some questions that the
 * standard "ctype" macros cannot ask.
 */
const char cinfo[256] = {
	_C, _C, _C, _C,		/* 0x0X */
	_C, _C, _C, _C,
	_C, _C, _C, _C,
	_C, _C, _C, _C,
	_C, _C, _C, _C,		/* 0x1X */
	_C, _C, _C, _C,
	_C, _C, _C, _C,
	_C, _C, _C, _C,
	0, _P, 0, 0,		/* 0x2X */
	_W, _W, 0, _W,
	0, 0, 0, 0,
	0, 0, _P, 0,
	_D | _W, _D | _W, _D | _W, _D | _W,	/* 0x3X */
	_D | _W, _D | _W, _D | _W, _D | _W,
	_D | _W, _D | _W, 0, 0,
	0, 0, 0, _P,
	0, _U | _W, _U | _W, _U | _W,	/* 0x4X */
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,	/* 0x5X */
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, 0,
	0, 0, 0, 0,
	0, _L | _W, _L | _W, _L | _W,	/* 0x6X */
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,	/* 0x7X */
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, 0,
	0, 0, 0, _C,
	0, 0, 0, 0,		/* 0x8X */
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,		/* 0x9X */
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,		/* 0xAX */
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,		/* 0xBX */
	0, 0, 0, 0,
	0, 0, 0, 0,
	0, 0, 0, 0,
	_U | _W, _U | _W, _U | _W, _U | _W,	/* 0xCX */
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,
	0, _U | _W, _U | _W, _U | _W,	/* 0xDX */
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, _U | _W, _U | _W,
	_U | _W, _U | _W, 0, _W,
	_L | _W, _L | _W, _L | _W, _L | _W,	/* 0xEX */
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,
	0, _L | _W, _L | _W, _L | _W,	/* 0xFX */
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, _L | _W, _L | _W,
	_L | _W, _L | _W, 0, 0
};

/*
 * Find the name of a keystroke.  Needs to be changed to handle 8-bit printing
 * characters and function keys better.	 Returns a pointer to the terminating
 * '\0'.
 */
char *
keyname(cp, len, k)
	char	*cp;
	size_t	len;
	int	k;
{
	char  *np;

	if (k < 0)
		k = CHARMASK(k);/* sign extended char */
	switch (k) {
	case CCHR('@'):
		np = "C-SPC";
		break;
	case CCHR('I'):
		np = "TAB";
		break;
	case CCHR('J'):
		np = "LFD";
		break;		/* yuck, but that's what GNU calls it */
	case CCHR('M'):
		np = "RET";
		break;
	case CCHR('['):
		np = "ESC";
		break;
	case ' ':
		np = "SPC";
		break;		/* yuck again */
	case CCHR('?'):
		np = "DEL";
		break;
	default:
#ifdef	FKEYS
		if (k >= KFIRST && k <= KLAST &&
		    (np = keystrings[k - KFIRST]) != NULL)
			break;
#endif
		if (k > CCHR('?')) {
			*cp++ = '0';
			*cp++ = ((k >> 6) & 7) + '0';
			*cp++ = ((k >> 3) & 7) + '0';
			*cp++ = (k & 7) + '0';
			*cp = '\0';
			return cp;
		}
		if (k < ' ') {
			*cp++ = 'C';
			*cp++ = '-';
			k = CCHR(k);
			if (ISUPPER(k))
				k = TOLOWER(k);
		}
		*cp++ = k;
		*cp = '\0';
		return cp;
	}
	return cp + strlcpy(cp, np, len);
}