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