1 
2 
3 /*ROR
4  * Copyright (c) 1991, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  *
31  *	@(#)diff.h	8.1 (Berkeley) 6/6/93
32  */
33 
34 #include <sys/types.h>
35 #include <regex.h>
36 
37 /*
38  * Output format options
39  */
40 #define	D_REVERSE	1	/* Reverse editor script */
41 #define	D_UNIFIED	3	/* Unified context diff */
42 #define	D_IFDEF		4	/* Diff with merged #ifdef's */
43 #define	D_NREVERSE	5	/* Reverse ed script with numbered
44 				   lines and no trailing . */
45 #define	D_BRIEF		6	/* Say if the files differ */
46 
47 /*
48  * Output flags
49  */
50 #define	D_HEADER	0x001	/* Print a header/footer between files */
51 #define	D_EMPTY1	0x002	/* Treat first file as empty (/dev/null) */
52 #define	D_EMPTY2	0x004	/* Treat second file as empty (/dev/null) */
53 
54 /*
55  * Command line flags
56  */
57 #define D_FORCEASCII	0x008	/* Treat file as ascii regardless of content */
58 #define D_FOLDBLANKS	0x010	/* Treat all white space as equal */
59 #define D_MINIMAL	0x020	/* Make diff as small as possible */
60 #define D_IGNORECASE	0x040	/* Case-insensitive matching */
61 #define D_PROTOTYPE	0x080	/* Display C function prototype */
62 #define D_EXPANDTABS	0x100	/* Expand tabs to spaces */
63 #define D_IGNOREBLANKS	0x200	/* Ignore white space changes */
64 
65 /*
66  * Status values for print_status() and diffreg() return values
67  */
68 #define	D_SAME		0	/* Files are the same */
69 #define	D_DIFFER	1	/* Files are different */
70 #define	D_BINARY	2	/* Binary files are different */
71 #define	D_MISMATCH1	3	/* path1 was a dir, path2 a file */
72 #define	D_MISMATCH2	4	/* path1 was a file, path2 a dir */
73 #define	D_SKIPPED1	5	/* path1 was a special file */
74 #define	D_SKIPPED2	6	/* path2 was a special file */
75 
76 struct excludes {
77 	char *pattern;
78 	struct excludes *next;
79 };
80 
81 struct got_diff_state {
82 	int  *J;			/* will be overlaid on class */
83 	int  *class;		/* will be overlaid on file[0] */
84 	int  *klist;		/* will be overlaid on file[0] after class */
85 	int  *member;		/* will be overlaid on file[1] */
86 	int   clen;
87 	int   inifdef;		/* whether or not we are in a #ifdef block */
88 	int   len[2];
89 	int   pref, suff;	/* length of prefix and suffix */
90 	int   slen[2];
91 	int   anychange;
92 	long *ixnew;		/* will be overlaid on file[1] */
93 	long *ixold;		/* will be overlaid on klist */
94 	struct cand *clist;	/* merely a free storage pot for candidates */
95 	int   clistlen;		/* the length of clist */
96 	struct line *sfile[2];	/* shortened by pruning common prefix/suffix */
97 	u_char *chrtran;		/* translation table for case-folding */
98 	struct context_vec *context_vec_start;
99 	struct context_vec *context_vec_end;
100 	struct context_vec *context_vec_ptr;
101 	struct line *file[2];
102 #define FUNCTION_CONTEXT_SIZE	55
103 	char lastbuf[FUNCTION_CONTEXT_SIZE];
104 	int lastline;
105 	int lastmatchline;
106 	struct stat stb1, stb2;
107 	size_t max_context;
108 };
109 
110 struct got_diff_args {
111 	int	 Tflag;
112 	int	 diff_format, diff_context, status;
113 	char	*ifdefname, *diffargs;
114 	const char *label[2];
115 };
116 
117 char	*splice(char *, char *);
118 const struct got_error *got_diffreg(int *, FILE *,
119     FILE *, int, struct got_diff_args *, struct got_diff_state *, FILE *);
120 int	easprintf(char **, const char *, ...);
121 void	*emalloc(size_t);
122 void	*erealloc(void *, size_t);
123 void	diffdir(char *, char *, int);
124 void	print_only(const char *, size_t, const char *);
125 void	print_status(int, char *, char *, char *);