1/* $NetBSD: merge.c,v 1.1.1.2 1996/10/13 21:57:34 veego Exp $ */ 2 3/* merge - three-way file merge */ 4 5/* Copyright 1991, 1992, 1993, 1994, 1995 Paul Eggert 6 Distributed under license by the Free Software Foundation, Inc. 7 8This file is part of RCS. 9 10RCS is free software; you can redistribute it and/or modify 11it under the terms of the GNU General Public License as published by 12the Free Software Foundation; either version 2, or (at your option) 13any later version. 14 15RCS is distributed in the hope that it will be useful, 16but WITHOUT ANY WARRANTY; without even the implied warranty of 17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18GNU General Public License for more details. 19 20You should have received a copy of the GNU General Public License 21along with RCS; see the file COPYING. 22If not, write to the Free Software Foundation, 2359 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24 25Report problems and direct all questions to: 26 27 rcs-bugs@cs.purdue.edu 28 29*/ 30 31#include "rcsbase.h" 32 33static void badoption P((char const*)); 34 35static char const usage[] = 36 "\nmerge: usage: merge [-AeEpqxX3] [-L lab [-L lab [-L lab]]] file1 file2 file3"; 37 38 static void 39badoption(a) 40 char const *a; 41{ 42 error("unknown option: %s%s", a, usage); 43} 44 45 46mainProg(mergeId, "merge", "Id: merge.c,v 1.8 1995/06/16 06:19:24 eggert Exp") 47{ 48 register char const *a; 49 char const *arg[3], *label[3], *edarg = 0; 50 int labels, tostdout; 51 52 labels = 0; 53 tostdout = false; 54 55 for (; (a = *++argv) && *a++ == '-'; --argc) { 56 switch (*a++) { 57 case 'A': case 'E': case 'e': 58 if (edarg && edarg[1] != (*argv)[1]) 59 error("%s and %s are incompatible", 60 edarg, *argv 61 ); 62 edarg = *argv; 63 break; 64 65 case 'p': tostdout = true; break; 66 case 'q': quietflag = true; break; 67 68 case 'L': 69 if (3 <= labels) 70 faterror("too many -L options"); 71 if (!(label[labels++] = *++argv)) 72 faterror("-L needs following argument"); 73 --argc; 74 break; 75 76 case 'V': 77 printf("RCS version %s\n", RCS_version_string); 78 exitmain(0); 79 80 default: 81 badoption(a - 2); 82 continue; 83 } 84 if (*a) 85 badoption(a - 2); 86 } 87 88 if (argc != 4) 89 faterror("%s arguments%s", 90 argc<4 ? "not enough" : "too many", usage 91 ); 92 93 /* This copy keeps us `const'-clean. */ 94 arg[0] = argv[0]; 95 arg[1] = argv[1]; 96 arg[2] = argv[2]; 97 98 for (; labels < 3; labels++) 99 label[labels] = arg[labels]; 100 101 if (nerror) 102 exiterr(); 103 exitmain(merge(tostdout, edarg, label, arg)); 104} 105 106 107#if RCS_lint 108# define exiterr mergeExit 109#endif 110 void 111exiterr() 112{ 113 tempunlink(); 114 _exit(DIFF_TROUBLE); 115} 116