/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 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/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/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	"@(#)diff.h	1.6	94/09/06 SMI"	/* SVr4.0 1.3	*/

/*
 *		PROPRIETARY NOTICE (Combined)
 *
 * This source code is unpublished proprietary information
 * constituting, or derived under license from AT&T's UNIX(r) System V.
 * In addition, portions of such source code were derived from Berkeley
 * 4.3 BSD under license from the Regents of the University of
 * California.
 *
 *		Copyright Notice
 *
 * Notice of copyright on this source code product does not indicate
 * publication.
 *
 *	(c) 1986,1987,1988,1989  Sun Microsystems, Inc
 *	(c) 1983,1984,1985,1986,1987,1988,1989  AT&T.
 *		All rights reserved.
 */

/*
 * diff - common declarations
 */


void done();

/*
 * Output format options
 */
int	opt;

#define	D_NORMAL	0	/* Normal output */
#define	D_EDIT		-1	/* Editor script out */
#define	D_REVERSE	1	/* Reverse editor script */
#define	D_CONTEXT	2	/* Diff with context */
#define	D_IFDEF		3	/* Diff with merged #ifdef's */
#define	D_NREVERSE	4	/* Reverse ed script with numbered */
				/* lines and no trailing . */

/*
 * Constant declarations
 */
#define	HALFMASK	0xf

#define	prints(s)	fputs(s, stdout)

#define	MAX_CONTEXT	128

/*
 * diff - directory comparison
 */
#define	d_flags	d_ino

#define	ONLY	1		/* Only in this directory */
#define	SAME	2		/* Both places and same */
#define	DIFFER	4		/* Both places and different */
#define	DIRECT	8		/* Directory */

struct dir {
	u_long	d_ino;
	short	d_reclen;
	short	d_namlen;
	char	*d_entry;
};


/*
 * type definitions
 */

struct cand {
	int x;
	int y;
	int pred;
} cand;

struct line {
	int serial;
	int value;
} *file[2], line;

/*
 * The following struct is used to record change information when
 * doing a "context" diff.  (see routine "change" to understand the
 * highly mneumonic field names)
 */
struct context_vec {
	int	a;	/* start line in old file */
	int	b;	/* end line in old file */
	int	c;	/* start line in new file */
	int	d;	/* end line in new file */
};


/*
 * Algorithm related options
 */
int bflag = 0;
int tflag = 0;
int wflag = 0;
int iflag = 0;
int rflag = 0;
int lflag = 0;
int sflag = 0;
int hflag = 0;

/*
 * Variables for D_IFDEF option.
 */
int wantelses = 0;	/* used with D_IFDEF */
char *ifdef1, *ifdef2;  /* hold the ifdef strings */
char *endifname;
int inifdef = 0;

/*
 * Variables for -C (-c) context option.
 */
int context = 0;	/* number of lines specfied with the C flag */

char *empty = "";	/* the empty string */

char **diffargv;	/* keep track of argv for diffdir */

char start[256];	/* specify where to start, used with -S */

FILE *input[2];		/* two input files */
int  len[2];
struct line *sfile[2];  /* shortened by pruning common prefix and suffix */
int  slen[2];

struct stat stb0, stb1;

/*
 * Input file names.
 * With diffdir, file1 and file2 are allocated BUFSIZ space,
 * and padded with a '/', and then efile0 and efile1 point after
 * the '/'.
 */
char	*file1, *file2, *efile1, *efile2;
struct	stat stb1, stb2;
char	*file1, *file2, *efile1, *efile2;

char pr[] = "/usr/bin/pr";
char diff[] = "/usr/bin/diff";
char diffh[] = "/usr/lib/diffh";
int status = 2;
int anychange = 0;

struct	context_vec	*context_vec_start,
			*context_vec_end,
			*context_vec_ptr;

char tempfile[2][16];	/* used when comparing against std input */
			/* or char special devices */
int whichtemp;
char *dummy;		/* used in resetting storage search ptr */