#include <stdio.h>
#include "tools.h"

/* Map escape sequences into their equivalent symbols.  Returns the
 * correct ASCII character.  If no escape prefix is present then s
 * is untouched and *s is returned, otherwise **s is advanced to point
 * at the escaped character and the translated character is returned.
 */
esc(s)
char	**s;
{
	register int	rval;

	
	if (**s != ESCAPE)
	{
		rval = **s;
	} else {
		(*s)++;

		switch(toupper(**s))
		{
		case '\000':
			rval = ESCAPE;	break;
		case 'S':
			rval = ' ';	break;
		case 'N':
			rval = '\n';	break;
		case 'T':
			rval = '\t';	break;
		case 'B':
			rval = '\b';	break;
		case 'R':
			rval = '\r';	break;
		default:
			rval = **s;	break;
		}
	}

	return (rval);
}