1 /* $OpenBSD: ex_equal.c,v 1.6 2014/11/12 04:28:41 bentley Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1992, 1993, 1994, 1995, 1996 7 * Keith Bostic. All rights reserved. 8 * 9 * See the LICENSE file for redistribution information. 10 */ 11 12 #include "config.h" 13 14 #include <sys/types.h> 15 #include <sys/queue.h> 16 17 #include <bitstring.h> 18 #include <limits.h> 19 #include <stdio.h> 20 21 #include "../common/common.h" 22 23 /* 24 * ex_equal -- :address = 25 * 26 * PUBLIC: int ex_equal(SCR *, EXCMD *); 27 */ 28 int 29 ex_equal(SCR *sp, EXCMD *cmdp) 30 { 31 recno_t lno; 32 33 NEEDFILE(sp, cmdp); 34 35 /* 36 * Print out the line number matching the specified address, 37 * or the number of the last line in the file if no address 38 * specified. 39 * 40 * !!! 41 * Historically, ":0=" displayed 0, and ":=" or ":1=" in an 42 * empty file displayed 1. Until somebody complains loudly, 43 * we're going to do it right. The tables in excmd.c permit 44 * lno to get away with any address from 0 to the end of the 45 * file, which, in an empty file, is 0. 46 */ 47 if (F_ISSET(cmdp, E_ADDR_DEF)) { 48 if (db_last(sp, &lno)) 49 return (1); 50 } else 51 lno = cmdp->addr1.lno; 52 53 (void)ex_printf(sp, "%ld\n", lno); 54 return (0); 55 } 56