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/* merge - three-way file merge */
/* Copyright 1991, 1992, 1993, 1994, 1995 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,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Report problems and direct all questions to:
rcs-bugs@cs.purdue.edu
*/
#include "rcsbase.h"
static void badoption P((char const*));
static char const usage[] =
"\nmerge: usage: merge [-AeEpqxX3] [-L lab [-L lab [-L lab]]] file1 file2 file3";
static void
badoption(a)
char const *a;
{
error("unknown option: %s%s", a, usage);
}
mainProg(mergeId, "merge", "$Id: merge.c,v 1.8 1995/06/16 06:19:24 eggert Exp $")
{
register char const *a;
char const *arg[3], *label[3], *edarg = 0;
int labels, tostdout;
labels = 0;
tostdout = false;
for (; (a = *++argv) && *a++ == '-'; --argc) {
switch (*a++) {
case 'A': case 'E': case 'e':
if (edarg && edarg[1] != (*argv)[1])
error("%s and %s are incompatible",
edarg, *argv
);
edarg = *argv;
break;
case 'p': tostdout = true; break;
case 'q': quietflag = true; break;
case 'L':
if (3 <= labels)
faterror("too many -L options");
if (!(label[labels++] = *++argv))
faterror("-L needs following argument");
--argc;
break;
case 'V':
printf("RCS version %s\n", RCS_version_string);
exitmain(0);
default:
badoption(a - 2);
continue;
}
if (*a)
badoption(a - 2);
}
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];
for (; labels < 3; labels++)
label[labels] = arg[labels];
if (nerror)
exiterr();
exitmain(merge(tostdout, edarg, label, arg));
}
#if RCS_lint
# define exiterr mergeExit
#endif
void
exiterr()
{
tempunlink();
_exit(DIFF_TROUBLE);
}
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