98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/* merge - three-way file merge */
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/* Copyright 1991 by Paul Eggert
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Distributed under license by the Free Software Foundation, Inc.
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This file is part of RCS.
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RCS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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RCS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with RCS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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Report problems and direct all questions to:
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rcs-bugs@cs.purdue.edu
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*/
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#include "rcsbase.h"
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static char const usage[] =
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"\nmerge: usage: merge [-p] [-q] [-L label1 [-L label3]] file1 file2 file3\n";
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static exiting void
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badoption(a)
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char const *a;
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{
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faterror("unknown option: %s%s", a-2, usage);
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}
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mainProg(mergeId, "merge", "$Id: merge.c,v 1.2 1991/08/19 03:13:55 eggert Exp $")
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{
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register char const *a;
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char const *label[2], *arg[3];
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int labels, tostdout;
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labels = 0;
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tostdout = false;
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while ((a = *++argv) && *a++ == '-') {
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switch (*a++) {
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case 'p': tostdout = true; break;
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case 'q': quietflag = true; break;
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case 'L':
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if (1<labels)
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faterror("too many -L options");
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if (!(label[labels++] = *++argv))
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faterror("-L needs following argument");
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--argc;
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break;
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default:
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badoption(a);
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}
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if (*a)
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badoption(a);
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--argc;
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}
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if (argc != 4)
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faterror("%s arguments%s",
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argc<4 ? "not enough" : "too many", usage
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);
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/* This copy keeps us `const'-clean. */
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arg[0] = argv[0];
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arg[1] = argv[1];
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arg[2] = argv[2];
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switch (labels) {
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case 0: label[0] = arg[0]; /* fall into */
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case 1: label[1] = arg[2];
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}
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exitmain(merge(tostdout, label, arg));
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}
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#if lint
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# define exiterr mergeExit
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#endif
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exiting void
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exiterr()
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{
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tempunlink();
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_exit(DIFF_TROUBLE);
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}
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