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Import col(1) from OpenBSD with minor modifications 

Remove getopt, use arg.h.
This commit is contained in:
sin 2014-09-29 19:45:42 +01:00
parent 7c6f2f60e6
commit a48b850d3f
3 changed files with 634 additions and 0 deletions
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1
Makefile
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@ -38,6 +38,7 @@ SRC = \
chroot.c \
cksum.c \
cmp.c \
col.c \
cols.c \
comm.c \
cp.c \

126
col.1 Normal file
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@ -0,0 +1,126 @@
.\" $OpenBSD: src/usr.bin/col/col.1,v 1.11 2010/10/29 07:58:04 jmc Exp $
.\" $NetBSD: col.1,v 1.4 1995/03/26 05:25:52 glass Exp $
.\"
.\" Copyright (c) 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Michael Rendell.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)col.1 8.1 (Berkeley) 6/29/93
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt COL 1
.Os
.Sh NAME
.Nm col
.Nd filter reverse line feeds and backspaces from input
.Sh SYNOPSIS
.Nm col
.Op Fl bfhx
.Op Fl l Ar num
.Sh DESCRIPTION
.Nm
filters out reverse (and half-reverse) line feeds so that the output is
in the correct order with only forward and half-forward line
feeds, and replaces whitespace characters with tabs where possible.
.Pp
.Nm
reads from the standard input and writes to the standard output.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl b
Do not output any backspaces, printing only the last character
written to each column position.
This can be useful in processing the output of
.Xr mandoc 1 .
.It Fl f
Forward half-line feeds are permitted
.Pf ( Ns Dq fine
mode).
Normally characters printed on a half-line boundary are printed
on the following line.
.It Fl h
Compress spaces into tabs.
This is the default behavior.
.It Fl l Ar num
Buffer at least
.Ar num
lines in memory.
By default, 128 lines are buffered.
.It Fl x
Output multiple spaces instead of tabs.
.El
.Pp
The control sequences for carriage motion that
.Nm
understands and their decimal values are listed in the following
table:
.Pp
.Bl -tag -width "carriage return" -compact
.It ESC\-7
Reverse line feed (escape then 7).
.It ESC\-10
Half reverse line feed (escape then 10).
.It ESC\-11
Half forward line feed (escape then 11).
.It backspace
Moves back one column (8); ignored in the first column.
.It carriage return
(13)
.It newline
Forward line feed (10); also does carriage return.
.It shift in
Shift to normal character set (15).
.It shift out
Shift to alternate character set (14).
.It space
Moves forward one column (32).
.It tab
Moves forward to next tab stop (9).
.It vertical tab
Reverse line feed (11).
.El
.Pp
All unrecognized control characters and escape sequences are
discarded.
.Pp
.Nm
keeps track of the character set as characters are read and makes
sure the character set is correct when they are output.
.Pp
If the input attempts to back up to the last flushed line,
.Nm
will display a warning message.
.Sh SEE ALSO
.Xr expand 1
.Sh HISTORY
A
.Nm
command appeared in
.At v6 .

507
col.c Normal file
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/* $OpenBSD: src/usr.bin/col/col.c,v 1.11 2009/10/27 23:59:36 deraadt Exp $ */
/* $NetBSD: col.c,v 1.7 1995/09/02 05:48:50 jtc Exp $ */
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Michael Rendell of the Memorial University of Newfoundland.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <ctype.h>
#include <err.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include "util.h"
#define BS '\b' /* backspace */
#define TAB '\t' /* tab */
#define SPACE ' ' /* space */
#define NL '\n' /* newline */
#define CR '\r' /* carriage return */
#define ESC '\033' /* escape */
#define SI '\017' /* shift in to normal character set */
#define SO '\016' /* shift out to alternate character set */
#define VT '\013' /* vertical tab (aka reverse line feed) */
#define RLF '\007' /* ESC-07 reverse line feed */
#define RHLF '\010' /* ESC-010 reverse half-line feed */
#define FHLF '\011' /* ESC-011 forward half-line feed */
/* build up at least this many lines before flushing them out */
#define BUFFER_MARGIN 32
typedef char CSET;
typedef struct char_str {
#define CS_NORMAL 1
#define CS_ALTERNATE 2
short c_column; /* column character is in */
CSET c_set; /* character set (currently only 2) */
char c_char; /* character in question */
} CHAR;
typedef struct line_str LINE;
struct line_str {
CHAR *l_line; /* characters on the line */
LINE *l_prev; /* previous line */
LINE *l_next; /* next line */
int l_lsize; /* allocated sizeof l_line */
int l_line_len; /* strlen(l_line) */
int l_needs_sort; /* set if chars went in out of order */
int l_max_col; /* max column in the line */
};
LINE *alloc_line(void);
void dowarn(int);
void flush_line(LINE *);
void flush_lines(int);
void flush_blanks(void);
void free_line(LINE *);
void usage(void);
void *xmalloc(void *, size_t);
CSET last_set; /* char_set of last char printed */
LINE *lines;
int compress_spaces; /* if doing space -> tab conversion */
int fine; /* if `fine' resolution (half lines) */
int max_bufd_lines; /* max # lines to keep in memory */
int nblank_lines; /* # blanks after last flushed line */
int no_backspaces; /* if not to output any backspaces */
#define PUTC(ch) \
if (putchar(ch) == EOF) \
eprintf("stdout:");
int
main(int argc, char *argv[])
{
int ch;
CHAR *c;
CSET cur_set; /* current character set */
LINE *l; /* current line */
int extra_lines; /* # of lines above first line */
int cur_col; /* current column */
int cur_line; /* line number of current position */
int max_line; /* max value of cur_line */
int this_line; /* line l points to */
int nflushd_lines; /* number of lines that were flushed */
int adjust, warned;
max_bufd_lines = 128;
compress_spaces = 1; /* compress spaces into tabs */
ARGBEGIN {
case 'b': /* do not output backspaces */
no_backspaces = 1;
break;
case 'f': /* allow half forward line feeds */
fine = 1;
break;
case 'h': /* compress spaces into tabs */
compress_spaces = 1;
break;
case 'l': /* buffered line count */
max_bufd_lines = estrtol(EARGF(usage()), 0);
break;
case 'x': /* do not compress spaces into tabs */
compress_spaces = 0;
break;
case '?':
default:
usage();
} ARGEND;
if (argc != 0)
usage();
/* this value is in half lines */
max_bufd_lines *= 2;
adjust = cur_col = extra_lines = warned = 0;
cur_line = max_line = nflushd_lines = this_line = 0;
cur_set = last_set = CS_NORMAL;
lines = l = alloc_line();
while ((ch = getchar()) != EOF) {
if (!isgraph(ch)) {
switch (ch) {
case BS: /* can't go back further */
if (cur_col == 0)
continue;
--cur_col;
continue;
case CR:
cur_col = 0;
continue;
case ESC: /* just ignore EOF */
switch(getchar()) {
case RLF:
cur_line -= 2;
break;
case RHLF:
cur_line--;
break;
case FHLF:
cur_line++;
if (cur_line > max_line)
max_line = cur_line;
}
continue;
case NL:
cur_line += 2;
if (cur_line > max_line)
max_line = cur_line;
cur_col = 0;
continue;
case SPACE:
++cur_col;
continue;
case SI:
cur_set = CS_NORMAL;
continue;
case SO:
cur_set = CS_ALTERNATE;
continue;
case TAB: /* adjust column */
cur_col |= 7;
++cur_col;
continue;
case VT:
cur_line -= 2;
continue;
}
continue;
}
/* Must stuff ch in a line - are we at the right one? */
if (cur_line != this_line - adjust) {
LINE *lnew;
int nmove;
adjust = 0;
nmove = cur_line - this_line;
if (!fine) {
/* round up to next line */
if (cur_line & 1) {
adjust = 1;
nmove++;
}
}
if (nmove < 0) {
for (; nmove < 0 && l->l_prev; nmove++)
l = l->l_prev;
if (nmove) {
if (nflushd_lines == 0) {
/*
* Allow backup past first
* line if nothing has been
* flushed yet.
*/
for (; nmove < 0; nmove++) {
lnew = alloc_line();
l->l_prev = lnew;
lnew->l_next = l;
l = lines = lnew;
extra_lines++;
}
} else {
if (!warned++)
dowarn(cur_line);
cur_line -= nmove;
}
}
} else {
/* may need to allocate here */
for (; nmove > 0 && l->l_next; nmove--)
l = l->l_next;
for (; nmove > 0; nmove--) {
lnew = alloc_line();
lnew->l_prev = l;
l->l_next = lnew;
l = lnew;
}
}
this_line = cur_line + adjust;
nmove = this_line - nflushd_lines;
if (nmove >= max_bufd_lines + BUFFER_MARGIN) {
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");
}