1 /* merge - three-way file merge */
2
3 /* Copyright 1991, 1992, 1993, 1994, 1995 Paul Eggert
4 Distributed under license by the Free Software Foundation, Inc.
5
6 This file is part of RCS.
7
8 RCS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 RCS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with RCS; see the file COPYING.
20 If not, write to the Free Software Foundation,
21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22
23 Report problems and direct all questions to:
24
25 rcs-bugs@cs.purdue.edu
26
27 */
28 /*
29 * $FreeBSD: src/gnu/usr.bin/rcs/merge/merge.c,v 1.5 1999/08/27 23:36:51 peter Exp $
30 * $DragonFly: src/gnu/usr.bin/rcs/merge/merge.c,v 1.2 2003/06/17 04:25:47 dillon Exp $
31 */
32
33 #include "rcsbase.h"
34
35 static void badoption P((char const*));
36
37 static char const usage[] =
38 "\nmerge: usage: merge [-AeEpqxX3] [-L lab [-L lab [-L lab]]] file1 file2 file3";
39
40 static void
badoption(a)41 badoption(a)
42 char const *a;
43 {
44 error("unknown option: %s%s", a, usage);
45 }
46
47
48 mainProg(mergeId, "merge", "$DragonFly: src/gnu/usr.bin/rcs/merge/merge.c,v 1.2 2003/06/17 04:25:47 dillon Exp $")
49 {
50 register char const *a;
51 char const *arg[3], *label[3], *edarg = 0;
52 int labels, tostdout;
53
54 labels = 0;
55 tostdout = false;
56
57 for (; (a = *++argv) && *a++ == '-'; --argc) {
58 switch (*a++) {
59 case 'A': case 'E': case 'e':
60 if (edarg && edarg[1] != (*argv)[1])
61 error("%s and %s are incompatible",
62 edarg, *argv
63 );
64 edarg = *argv;
65 break;
66
67 case 'p': tostdout = true; break;
68 case 'q': quietflag = true; break;
69
70 case 'L':
71 if (3 <= labels)
72 faterror("too many -L options");
73 if (!(label[labels++] = *++argv))
74 faterror("-L needs following argument");
75 --argc;
76 break;
77
78 case 'V':
79 printf("RCS version %s\n", RCS_version_string);
80 exitmain(0);
81
82 default:
83 badoption(a - 2);
84 continue;
85 }
86 if (*a)
87 badoption(a - 2);
88 }
89
90 if (argc != 4)
91 faterror("%s arguments%s",
92 argc<4 ? "not enough" : "too many", usage
93 );
94
95 /* This copy keeps us `const'-clean. */
96 arg[0] = argv[0];
97 arg[1] = argv[1];
98 arg[2] = argv[2];
99
100 for (; labels < 3; labels++)
101 label[labels] = arg[labels];
102
103 if (nerror)
104 exiterr();
105 exitmain(merge(tostdout, edarg, label, arg));
106 }
107
108
109 #if RCS_lint
110 # define exiterr mergeExit
111 #endif
112 void
exiterr()113 exiterr()
114 {
115 tempunlink();
116 _exit(DIFF_TROUBLE);
117 }
118