freebsd-nq/usr.bin/colcrt/colcrt.c
Warner Losh fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

284 lines
5.9 KiB
C

/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#if 0
#ifndef lint
static char sccsid[] = "@(#)colcrt.c 8.1 (Berkeley) 6/6/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
/*
* colcrt - replaces col for crts with new nroff esp. when using tbl.
* Bill Joy UCB July 14, 1977
*
* This filter uses a screen buffer, 267 half-lines by 132 columns.
* It interprets the up and down sequences generated by the new
* nroff when used with tbl and by \u \d and \r.
* General overstriking doesn't work correctly.
* Underlining is split onto multiple lines, etc.
*
* Option - suppresses all underlining.
* Option -2 forces printing of all half lines.
*/
static wchar_t page[267][132];
static int outline = 1;
static int outcol;
static char suppresul;
static char printall;
static void move(int, int);
static void pflush(int);
static int plus(wchar_t, wchar_t);
static void usage(void);
int
main(int argc, char *argv[])
{
wint_t c;
wchar_t *cp, *dp;
int ch, i, w;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "-2")) != -1)
switch (ch) {
case '-':
suppresul = 1;
break;
case '2':
printall = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
do {
if (argc > 0) {
if (freopen(argv[0], "r", stdin) == NULL) {
fflush(stdout);
err(1, "%s", argv[0]);
}
argc--;
argv++;
}
for (;;) {
c = getwc(stdin);
if (c == WEOF) {
pflush(outline);
fflush(stdout);
break;
}
switch (c) {
case '\n':
if (outline >= 265)
pflush(62);
outline += 2;
outcol = 0;
continue;
case '\016':
case '\017':
continue;
case 033:
c = getwc(stdin);
switch (c) {
case '9':
if (outline >= 266)
pflush(62);
outline++;
continue;
case '8':
if (outline >= 1)
outline--;
continue;
case '7':
outline -= 2;
if (outline < 0)
outline = 0;
continue;
default:
continue;
}
case '\b':
if (outcol)
outcol--;
continue;
case '\t':
outcol += 8;
outcol &= ~7;
outcol--;
c = ' ';
default:
if ((w = wcwidth(c)) <= 0)
w = 1; /* XXX */
if (outcol + w > 132) {
outcol += w;
continue;
}
cp = &page[outline][outcol];
outcol += w;
if (c == '_') {
if (suppresul)
continue;
cp += 132;
c = '-';
}
if (*cp == 0) {
for (i = 0; i < w; i++)
cp[i] = c;
dp = cp - (outcol - w);
for (cp--; cp >= dp && *cp == 0; cp--)
*cp = ' ';
} else {
if (plus(c, *cp) || plus(*cp, c))
*cp = '+';
else if (*cp == ' ' || *cp == 0) {
for (i = 1; i < w; i++)
if (cp[i] != ' ' &&
cp[i] != 0)
goto cont;
for (i = 0; i < w; i++)
cp[i] = c;
}
}
cont:
continue;
}
}
if (ferror(stdin))
err(1, NULL);
} while (argc > 0);
fflush(stdout);
exit(0);
}
static void
usage(void)
{
fprintf(stderr, "usage: colcrt [-] [-2] [file ...]\n");
exit(1);
}
static int
plus(wchar_t c, wchar_t d)
{
return ((c == '|' && d == '-') || d == '_');
}
static void
pflush(int ol)
{
static int first;
int i;
wchar_t *cp;
char lastomit;
int l, w;
l = ol;
lastomit = 0;
if (l > 266)
l = 266;
else
l |= 1;
for (i = first | 1; i < l; i++) {
move(i, i - 1);
move(i, i + 1);
}
for (i = first; i < l; i++) {
cp = page[i];
if (printall == 0 && lastomit == 0 && *cp == 0) {
lastomit = 1;
continue;
}
lastomit = 0;
while (*cp != L'\0') {
if ((w = wcwidth(*cp)) > 0) {
putwchar(*cp);
cp += w;
} else
cp++;
}
putwchar(L'\n');
}
wmemcpy(page[0], page[ol], (267 - ol) * 132);
wmemset(page[267- ol], L'\0', ol * 132);
outline -= ol;
outcol = 0;
first = 1;
}
static void
move(int l, int m)
{
wchar_t *cp, *dp;
for (cp = page[l], dp = page[m]; *cp; cp++, dp++) {
switch (*cp) {
case '|':
if (*dp != ' ' && *dp != '|' && *dp != 0)
return;
break;
case ' ':
break;
default:
return;
}
}
if (*cp == 0) {
for (cp = page[l], dp = page[m]; *cp; cp++, dp++)
if (*cp == '|')
*dp = '|';
else if (*dp == 0)
*dp = ' ';
page[l][0] = 0;
}
}