/*	Copyright (c) 1984, 1986, 1987, 1988 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"@(#)libl:lib/yyless.c	1.6"
yyless(x)
{
extern char yytext[];
register char *lastch, *ptr;
extern int yyleng;
extern int yyprevious;
lastch = yytext+yyleng;
if (x>=0 && x <= yyleng)
	ptr = x + yytext;
else
	/*
	 * The cast on the next line papers over an unconscionable nonportable
	 * glitch to allow the caller to hand the function a pointer instead of
	 * an integer and hope that it gets figured out properly.  But it's
	 * that way on all systems .   
	 */
	ptr = (char *) x;
while (lastch > ptr)
	yyunput(*--lastch);
*lastch = 0;
if (ptr >yytext)
	yyprevious = *--lastch;
yyleng = ptr-yytext;
}
