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 #ifndef lint 13 static const char sccsid[] = "$Id: ex_equal.c,v 10.12 2001/06/25 15:19:15 skimo Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <limits.h> 22 #include <stdio.h> 23 24 #include "../common/common.h" 25 26 /* 27 * ex_equal -- :address = 28 * 29 * PUBLIC: int ex_equal(SCR *, EXCMD *); 30 */ 31 int 32 ex_equal(SCR *sp, EXCMD *cmdp) 33 { 34 recno_t lno; 35 36 NEEDFILE(sp, cmdp); 37 38 /* 39 * Print out the line number matching the specified address, 40 * or the number of the last line in the file if no address 41 * specified. 42 * 43 * !!! 44 * Historically, ":0=" displayed 0, and ":=" or ":1=" in an 45 * empty file displayed 1. Until somebody complains loudly, 46 * we're going to do it right. The tables in excmd.c permit 47 * lno to get away with any address from 0 to the end of the 48 * file, which, in an empty file, is 0. 49 */ 50 if (F_ISSET(cmdp, E_ADDR_DEF)) { 51 if (db_last(sp, &lno)) 52 return (1); 53 } else 54 lno = cmdp->addr1.lno; 55 56 (void)ex_printf(sp, "%ld\n", lno); 57 return (0); 58 } 59