Import col(1) from OpenBSD with minor modifications
Remove getopt, use arg.h.
This commit is contained in:
sin
parent
7c6f2f60e6
commit
a48b850d3f
1
Makefile
1
Makefile
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@ -38,6 +38,7 @@ SRC = \
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chroot.c \
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chroot.c \
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cksum.c \
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cksum.c \
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cmp.c \
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cmp.c \
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col.c \
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cols.c \
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cols.c \
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comm.c \
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comm.c \
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cp.c \
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cp.c \
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126
col.1
Normal file
126
col.1
Normal file
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@ -0,0 +1,126 @@
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.\" $OpenBSD: src/usr.bin/col/col.1,v 1.11 2010/10/29 07:58:04 jmc Exp $
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.\" $NetBSD: col.1,v 1.4 1995/03/26 05:25:52 glass Exp $
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.\"
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.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Michael Rendell.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)col.1 8.1 (Berkeley) 6/29/93
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.\"
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.Dd $Mdocdate: May 31 2007 $
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.Dt COL 1
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.Os
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.Sh NAME
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.Nm col
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.Nd filter reverse line feeds and backspaces from input
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.Sh SYNOPSIS
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.Nm col
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.Op Fl bfhx
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.Op Fl l Ar num
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.Sh DESCRIPTION
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.Nm
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filters out reverse (and half-reverse) line feeds so that the output is
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in the correct order with only forward and half-forward line
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feeds, and replaces whitespace characters with tabs where possible.
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.Pp
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.Nm
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reads from the standard input and writes to the standard output.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl b
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Do not output any backspaces, printing only the last character
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written to each column position.
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This can be useful in processing the output of
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.Xr mandoc 1 .
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.It Fl f
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Forward half-line feeds are permitted
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.Pf ( Ns Dq fine
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mode).
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Normally characters printed on a half-line boundary are printed
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on the following line.
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.It Fl h
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Compress spaces into tabs.
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This is the default behavior.
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.It Fl l Ar num
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Buffer at least
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.Ar num
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lines in memory.
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By default, 128 lines are buffered.
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.It Fl x
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Output multiple spaces instead of tabs.
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.El
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.Pp
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The control sequences for carriage motion that
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.Nm
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understands and their decimal values are listed in the following
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table:
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.Pp
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.Bl -tag -width "carriage return" -compact
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.It ESC\-7
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Reverse line feed (escape then 7).
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.It ESC\-10
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Half reverse line feed (escape then 10).
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.It ESC\-11
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Half forward line feed (escape then 11).
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.It backspace
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Moves back one column (8); ignored in the first column.
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.It carriage return
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(13)
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.It newline
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Forward line feed (10); also does carriage return.
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.It shift in
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Shift to normal character set (15).
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.It shift out
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Shift to alternate character set (14).
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.It space
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Moves forward one column (32).
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.It tab
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Moves forward to next tab stop (9).
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.It vertical tab
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Reverse line feed (11).
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.El
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.Pp
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All unrecognized control characters and escape sequences are
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discarded.
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.Pp
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.Nm
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keeps track of the character set as characters are read and makes
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sure the character set is correct when they are output.
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.Pp
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If the input attempts to back up to the last flushed line,
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.Nm
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will display a warning message.
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.Sh SEE ALSO
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.Xr expand 1
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v6 .
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507
col.c
Normal file
507
col.c
Normal file
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@ -0,0 +1,507 @@
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/* $OpenBSD: src/usr.bin/col/col.c,v 1.11 2009/10/27 23:59:36 deraadt Exp $ */
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/* $NetBSD: col.c,v 1.7 1995/09/02 05:48:50 jtc Exp $ */
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/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Michael Rendell of the Memorial University of Newfoundland.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <err.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include "util.h"
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#define BS '\b' /* backspace */
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#define TAB '\t' /* tab */
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#define SPACE ' ' /* space */
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#define NL '\n' /* newline */
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#define CR '\r' /* carriage return */
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#define ESC '\033' /* escape */
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#define SI '\017' /* shift in to normal character set */
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#define SO '\016' /* shift out to alternate character set */
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#define VT '\013' /* vertical tab (aka reverse line feed) */
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#define RLF '\007' /* ESC-07 reverse line feed */
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#define RHLF '\010' /* ESC-010 reverse half-line feed */
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#define FHLF '\011' /* ESC-011 forward half-line feed */
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/* build up at least this many lines before flushing them out */
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#define BUFFER_MARGIN 32
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typedef char CSET;
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typedef struct char_str {
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#define CS_NORMAL 1
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#define CS_ALTERNATE 2
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short c_column; /* column character is in */
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CSET c_set; /* character set (currently only 2) */
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char c_char; /* character in question */
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} CHAR;
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typedef struct line_str LINE;
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struct line_str {
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CHAR *l_line; /* characters on the line */
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LINE *l_prev; /* previous line */
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LINE *l_next; /* next line */
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int l_lsize; /* allocated sizeof l_line */
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int l_line_len; /* strlen(l_line) */
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int l_needs_sort; /* set if chars went in out of order */
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int l_max_col; /* max column in the line */
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};
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LINE *alloc_line(void);
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void dowarn(int);
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void flush_line(LINE *);
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void flush_lines(int);
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void flush_blanks(void);
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void free_line(LINE *);
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void usage(void);
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void *xmalloc(void *, size_t);
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CSET last_set; /* char_set of last char printed */
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LINE *lines;
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int compress_spaces; /* if doing space -> tab conversion */
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int fine; /* if `fine' resolution (half lines) */
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int max_bufd_lines; /* max # lines to keep in memory */
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int nblank_lines; /* # blanks after last flushed line */
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int no_backspaces; /* if not to output any backspaces */
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#define PUTC(ch) \
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if (putchar(ch) == EOF) \
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eprintf("stdout:");
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int
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main(int argc, char *argv[])
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{
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int ch;
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CHAR *c;
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CSET cur_set; /* current character set */
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LINE *l; /* current line */
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int extra_lines; /* # of lines above first line */
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int cur_col; /* current column */
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int cur_line; /* line number of current position */
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int max_line; /* max value of cur_line */
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int this_line; /* line l points to */
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int nflushd_lines; /* number of lines that were flushed */
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int adjust, warned;
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max_bufd_lines = 128;
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compress_spaces = 1; /* compress spaces into tabs */
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ARGBEGIN {
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case 'b': /* do not output backspaces */
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no_backspaces = 1;
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break;
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case 'f': /* allow half forward line feeds */
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fine = 1;
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break;
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case 'h': /* compress spaces into tabs */
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compress_spaces = 1;
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break;
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case 'l': /* buffered line count */
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max_bufd_lines = estrtol(EARGF(usage()), 0);
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break;
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case 'x': /* do not compress spaces into tabs */
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compress_spaces = 0;
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break;
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case '?':
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default:
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usage();
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} ARGEND;
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if (argc != 0)
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usage();
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/* this value is in half lines */
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max_bufd_lines *= 2;
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adjust = cur_col = extra_lines = warned = 0;
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cur_line = max_line = nflushd_lines = this_line = 0;
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cur_set = last_set = CS_NORMAL;
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lines = l = alloc_line();
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while ((ch = getchar()) != EOF) {
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if (!isgraph(ch)) {
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switch (ch) {
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case BS: /* can't go back further */
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if (cur_col == 0)
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continue;
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--cur_col;
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continue;
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case CR:
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cur_col = 0;
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continue;
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case ESC: /* just ignore EOF */
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switch(getchar()) {
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case RLF:
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cur_line -= 2;
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break;
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case RHLF:
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cur_line--;
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break;
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case FHLF:
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cur_line++;
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if (cur_line > max_line)
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max_line = cur_line;
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}
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continue;
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case NL:
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cur_line += 2;
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if (cur_line > max_line)
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max_line = cur_line;
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cur_col = 0;
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continue;
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case SPACE:
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++cur_col;
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continue;
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case SI:
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cur_set = CS_NORMAL;
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continue;
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case SO:
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cur_set = CS_ALTERNATE;
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continue;
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case TAB: /* adjust column */
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cur_col |= 7;
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++cur_col;
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continue;
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case VT:
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cur_line -= 2;
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continue;
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}
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continue;
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}
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/* Must stuff ch in a line - are we at the right one? */
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if (cur_line != this_line - adjust) {
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LINE *lnew;
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int nmove;
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adjust = 0;
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nmove = cur_line - this_line;
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if (!fine) {
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/* round up to next line */
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if (cur_line & 1) {
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adjust = 1;
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nmove++;
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}
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}
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if (nmove < 0) {
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for (; nmove < 0 && l->l_prev; nmove++)
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l = l->l_prev;
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if (nmove) {
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if (nflushd_lines == 0) {
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/*
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* Allow backup past first
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* line if nothing has been
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* flushed yet.
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*/
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for (; nmove < 0; nmove++) {
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lnew = alloc_line();
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l->l_prev = lnew;
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lnew->l_next = l;
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l = lines = lnew;
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extra_lines++;
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}
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} else {
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if (!warned++)
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dowarn(cur_line);
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cur_line -= nmove;
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}
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}
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} else {
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/* may need to allocate here */
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for (; nmove > 0 && l->l_next; nmove--)
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l = l->l_next;
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for (; nmove > 0; nmove--) {
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lnew = alloc_line();
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lnew->l_prev = l;
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l->l_next = lnew;
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l = lnew;
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}
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}
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this_line = cur_line + adjust;
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nmove = this_line - nflushd_lines;
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if (nmove >= max_bufd_lines + BUFFER_MARGIN) {
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nflushd_lines += nmove - max_bufd_lines;
|
||||||
|
flush_lines(nmove - max_bufd_lines);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/* grow line's buffer? */
|
||||||
|
if (l->l_line_len + 1 >= l->l_lsize) {
|
||||||
|
int need;
|
||||||
|
|
||||||
|
need = l->l_lsize ? l->l_lsize * 2 : 90;
|
||||||
|
l->l_line = xmalloc((void *) l->l_line,
|
||||||
|
need * sizeof(CHAR));
|
||||||
|
l->l_lsize = need;
|
||||||
|
}
|
||||||
|
c = &l->l_line[l->l_line_len++];
|
||||||
|
c->c_char = ch;
|
||||||
|
c->c_set = cur_set;
|
||||||
|
c->c_column = cur_col;
|
||||||
|
/*
|
||||||
|
* If things are put in out of order, they will need sorting
|
||||||
|
* when it is flushed.
|
||||||
|
*/
|
||||||
|
if (cur_col < l->l_max_col)
|
||||||
|
l->l_needs_sort = 1;
|
||||||
|
else
|
||||||
|
l->l_max_col = cur_col;
|
||||||
|
cur_col++;
|
||||||
|
}
|
||||||
|
if (max_line == 0)
|
||||||
|
exit(EXIT_SUCCESS); /* no lines, so just exit */
|
||||||
|
|
||||||
|
/* goto the last line that had a character on it */
|
||||||
|
for (; l->l_next; l = l->l_next)
|
||||||
|
this_line++;
|
||||||
|
flush_lines(this_line - nflushd_lines + extra_lines + 1);
|
||||||
|
|
||||||
|
/* make sure we leave things in a sane state */
|
||||||
|
if (last_set != CS_NORMAL)
|
||||||
|
PUTC('\017');
|
||||||
|
|
||||||
|
/* flush out the last few blank lines */
|
||||||
|
nblank_lines = max_line - this_line;
|
||||||
|
if (max_line & 1)
|
||||||
|
nblank_lines++;
|
||||||
|
else if (!nblank_lines)
|
||||||
|
/* missing a \n on the last line? */
|
||||||
|
nblank_lines = 2;
|
||||||
|
flush_blanks();
|
||||||
|
exit(EXIT_SUCCESS);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
flush_lines(int nflush)
|
||||||
|
{
|
||||||
|
LINE *l;
|
||||||
|
|
||||||
|
while (--nflush >= 0) {
|
||||||
|
l = lines;
|
||||||
|
lines = l->l_next;
|
||||||
|
if (l->l_line) {
|
||||||
|
flush_blanks();
|
||||||
|
flush_line(l);
|
||||||
|
}
|
||||||
|
nblank_lines++;
|
||||||
|
if (l->l_line)
|
||||||
|
(void)free((void *)l->l_line);
|
||||||
|
free_line(l);
|
||||||
|
}
|
||||||
|
if (lines)
|
||||||
|
lines->l_prev = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Print a number of newline/half newlines. If fine flag is set, nblank_lines
|
||||||
|
* is the number of half line feeds, otherwise it is the number of whole line
|
||||||
|
* feeds.
|
||||||
|
*/
|
||||||
|
void
|
||||||
|
flush_blanks(void)
|
||||||
|
{
|
||||||
|
int half, i, nb;
|
||||||
|
|
||||||
|
half = 0;
|
||||||
|
nb = nblank_lines;
|
||||||
|
if (nb & 1) {
|
||||||
|
if (fine)
|
||||||
|
half = 1;
|
||||||
|
else
|
||||||
|
nb++;
|
||||||
|
}
|
||||||
|
nb /= 2;
|
||||||
|
for (i = nb; --i >= 0;)
|
||||||
|
PUTC('\n');
|
||||||
|
if (half) {
|
||||||
|
PUTC('\033');
|
||||||
|
PUTC('9');
|
||||||
|
if (!nb)
|
||||||
|
PUTC('\r');
|
||||||
|
}
|
||||||
|
nblank_lines = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Write a line to stdout taking care of space to tab conversion (-h flag)
|
||||||
|
* and character set shifts.
|
||||||
|
*/
|
||||||
|
void
|
||||||
|
flush_line(LINE *l)
|
||||||
|
{
|
||||||
|
CHAR *c, *endc;
|
||||||
|
int nchars, last_col, this_col;
|
||||||
|
|
||||||
|
last_col = 0;
|
||||||
|
nchars = l->l_line_len;
|
||||||
|
|
||||||
|
if (l->l_needs_sort) {
|
||||||
|
static CHAR *sorted;
|
||||||
|
static int count_size, *count, i, save, sorted_size, tot;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Do an O(n) sort on l->l_line by column being careful to
|
||||||
|
* preserve the order of characters in the same column.
|
||||||
|
*/
|
||||||
|
if (l->l_lsize > sorted_size) {
|
||||||
|
sorted_size = l->l_lsize;
|
||||||
|
sorted = xmalloc((void *)sorted,
|
||||||
|
sizeof(CHAR) * sorted_size);
|
||||||
|
}
|
||||||
|
if (l->l_max_col >= count_size) {
|
||||||
|
count_size = l->l_max_col + 1;
|
||||||
|
count = xmalloc((void *)count,
|
||||||
|
sizeof(int) * count_size);
|
||||||
|
}
|
||||||
|
memset((char *)count, 0, sizeof(int) * l->l_max_col + 1);
|
||||||
|
for (i = nchars, c = l->l_line; --i >= 0; c++)
|
||||||
|
count[c->c_column]++;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* calculate running total (shifted down by 1) to use as
|
||||||
|
* indices into new line.
|
||||||
|
*/
|
||||||
|
for (tot = 0, i = 0; i <= l->l_max_col; i++) {
|
||||||
|
save = count[i];
|
||||||
|
count[i] = tot;
|
||||||
|
tot += save;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (i = nchars, c = l->l_line; --i >= 0; c++)
|
||||||
|
sorted[count[c->c_column]++] = *c;
|
||||||
|
c = sorted;
|
||||||
|
} else
|
||||||
|
c = l->l_line;
|
||||||
|
while (nchars > 0) {
|
||||||
|
this_col = c->c_column;
|
||||||
|
endc = c;
|
||||||
|
do {
|
||||||
|
++endc;
|
||||||
|
} while (--nchars > 0 && this_col == endc->c_column);
|
||||||
|
|
||||||
|
/* if -b only print last character */
|
||||||
|
if (no_backspaces)
|
||||||
|
c = endc - 1;
|
||||||
|
|
||||||
|
if (this_col > last_col) {
|
||||||
|
int nspace = this_col - last_col;
|
||||||
|
|
||||||
|
if (compress_spaces && nspace > 1) {
|
||||||
|
int ntabs;
|
||||||
|
|
||||||
|
ntabs = ((last_col % 8) + nspace) / 8;
|
||||||
|
if (ntabs) {
|
||||||
|
nspace -= (ntabs * 8) - (last_col % 8);
|
||||||
|
while (--ntabs >= 0)
|
||||||
|
PUTC('\t');
|
||||||
|
}
|
||||||
|
}
|
||||||
|
while (--nspace >= 0)
|
||||||
|
PUTC(' ');
|
||||||
|
last_col = this_col;
|
||||||
|
}
|
||||||
|
last_col++;
|
||||||
|
|
||||||
|
for (;;) {
|
||||||
|
if (c->c_set != last_set) {
|
||||||
|
switch (c->c_set) {
|
||||||
|
case CS_NORMAL:
|
||||||
|
PUTC('\017');
|
||||||
|
break;
|
||||||
|
case CS_ALTERNATE:
|
||||||
|
PUTC('\016');
|
||||||
|
}
|
||||||
|
last_set = c->c_set;
|
||||||
|
}
|
||||||
|
PUTC(c->c_char);
|
||||||
|
if (++c >= endc)
|
||||||
|
break;
|
||||||
|
PUTC('\b');
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#define NALLOC 64
|
||||||
|
|
||||||
|
static LINE *line_freelist;
|
||||||
|
|
||||||
|
LINE *
|
||||||
|
alloc_line(void)
|
||||||
|
{
|
||||||
|
LINE *l;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (!line_freelist) {
|
||||||
|
l = xmalloc(NULL, sizeof(LINE) * NALLOC);
|
||||||
|
line_freelist = l;
|
||||||
|
for (i = 1; i < NALLOC; i++, l++)
|
||||||
|
l->l_next = l + 1;
|
||||||
|
l->l_next = NULL;
|
||||||
|
}
|
||||||
|
l = line_freelist;
|
||||||
|
line_freelist = l->l_next;
|
||||||
|
|
||||||
|
memset(l, 0, sizeof(LINE));
|
||||||
|
return (l);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
free_line(LINE *l)
|
||||||
|
{
|
||||||
|
|
||||||
|
l->l_next = line_freelist;
|
||||||
|
line_freelist = l;
|
||||||
|
}
|
||||||
|
|
||||||
|
void *
|
||||||
|
xmalloc(void *p, size_t size)
|
||||||
|
{
|
||||||
|
|
||||||
|
if (!(p = realloc(p, size)))
|
||||||
|
eprintf("realloc:");
|
||||||
|
return (p);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
usage(void)
|
||||||
|
{
|
||||||
|
eprintf("usage: %s [-bfhx] [-l num]\n", argv0);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
dowarn(int line)
|
||||||
|
{
|
||||||
|
warnx("warning: can't back up %s",
|
||||||
|
line < 0 ? "past first line" : "-- line already flushed");
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user