1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)extern.h	8.1 (Berkeley) 6/6/93
30 *
31 * $FreeBSD$
32 */
33
34#define	WR(p, size) do { \
35	if (write(STDOUT_FILENO, p, size) != (ssize_t)size) \
36		oerr(); \
37	} while(0)
38
39#define TAILMAPLEN (4<<20)
40
41struct mapinfo {
42	off_t	mapoff;
43	off_t	maxoff;
44	size_t	maplen;
45	char	*start;
46	int	fd;
47};
48
49struct file_info {
50	FILE *fp;
51	char *file_name;
52	struct stat st;
53};
54
55typedef struct file_info file_info_t;
56
57enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE };
58
59void follow(file_info_t *, enum STYLE, off_t);
60void forward(FILE *, const char *, enum STYLE, off_t, struct stat *);
61void reverse(FILE *, const char *, enum STYLE, off_t, struct stat *);
62
63int bytes(FILE *, const char *, off_t);
64int lines(FILE *, const char *, off_t);
65
66void ierr(const char *);
67void oerr(void);
68int mapprint(struct mapinfo *, off_t, off_t);
69int maparound(struct mapinfo *, off_t);
70void printfn(const char *, int);
71
72extern int Fflag, fflag, qflag, rflag, rval, no_files;
73