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