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Diffstat (limited to 'ex/ex_equal.c')
-rw-r--r-- | ex/ex_equal.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/ex/ex_equal.c b/ex/ex_equal.c new file mode 100644 index 000000000000..565df66bd0a9 --- /dev/null +++ b/ex/ex_equal.c @@ -0,0 +1,59 @@ +/*- + * Copyright (c) 1992, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 1992, 1993, 1994, 1995, 1996 + * Keith Bostic. All rights reserved. + * + * See the LICENSE file for redistribution information. + */ + +#include "config.h" + +#ifndef lint +static const char sccsid[] = "@(#)ex_equal.c 10.10 (Berkeley) 3/6/96"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/queue.h> + +#include <bitstring.h> +#include <limits.h> +#include <stdio.h> + +#include "../common/common.h" + +/* + * ex_equal -- :address = + * + * PUBLIC: int ex_equal __P((SCR *, EXCMD *)); + */ +int +ex_equal(sp, cmdp) + SCR *sp; + EXCMD *cmdp; +{ + recno_t lno; + + NEEDFILE(sp, cmdp); + + /* + * Print out the line number matching the specified address, + * or the number of the last line in the file if no address + * specified. + * + * !!! + * Historically, ":0=" displayed 0, and ":=" or ":1=" in an + * empty file displayed 1. Until somebody complains loudly, + * we're going to do it right. The tables in excmd.c permit + * lno to get away with any address from 0 to the end of the + * file, which, in an empty file, is 0. + */ + if (F_ISSET(cmdp, E_ADDR_DEF)) { + if (db_last(sp, &lno)) + return (1); + } else + lno = cmdp->addr1.lno; + + (void)ex_printf(sp, "%ld\n", lno); + return (0); +} |