/* 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); }