backpage.h

早期freebsd实现

/* $Id: backpage.h,v 3.0 1991/09/09 20:18:23 davison Trn $
 */
/* This software is Copyright 1991 by Stan Barber. 
 *
 * Permission is hereby granted to copy, reproduce, redistribute or otherwise
 * use this software as long as: there is no monetary profit gained
 * specifically from the use or reproduction of this software, it is not
 * sold, rented, traded or otherwise marketed, and this copyright notice is
 * included prominently in any copy made. 
 *
 * The author make no claims as to the fitness or correctness of this software
 * for any use whatsoever, and it is provided as is. Any use of this software
 * is at the user's own risk. 
 */

/* things for doing the 'back page' command */

EXT int varyfd INIT(0);			/* virtual array file for storing  */
					/* file offsets */
EXT ART_POS varybuf[VARYSIZE];		/* current window onto virtual array */

EXT long oldoffset INIT(-1);		/* offset to block currently in window */

void	backpage_init _((void));
ART_POS	vrdary _((ART_LINE));
void	vwtary _((ART_LINE,ART_POS));