blob: 891fd86db1924c020876e9f61b653f3a8b3db9fa [file] [log] [blame]
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/*
* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
* added Native Language Support
* 1999-09-19 Bruno Haible <haible@clisp.cons.org>
* modified to work correctly in multi-byte locales
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h> /* for close() */
#include <string.h>
#include "nls.h"
#include "widechar.h"
int plus(wchar_t c, wchar_t d);
void move(int l, int m);
void pflush(int ol);
/*
* 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.
*/
wchar_t page[267][132];
int outline = 1;
int outcol;
char suppresul;
char printall;
char *progname;
void colcrt(FILE *f);
int
main(int argc, char **argv) {
FILE *f;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
argc--;
progname = *argv++;
while (argc > 0 && argv[0][0] == '-') {
switch (argv[0][1]) {
case 0:
suppresul = 1;
break;
case '2':
printall = 1;
break;
default:
printf(_("usage: %s [ - ] [ -2 ] [ file ... ]\n"), progname);
fflush(stdout);
exit(1);
}
argc--;
argv++;
}
f = stdin;
do {
if (argc > 0) {
if (!(f = fopen(argv[0], "r"))) {
fflush(stdout);
perror(argv[0]);
exit (1);
}
argc--;
argv++;
}
colcrt(f);
if (f != stdin)
fclose(f);
} while (argc > 0);
fflush(stdout);
if (ferror(stdout) || fclose(stdout))
return 1;
return 0;
}
void
colcrt(FILE *f) {
wint_t c;
wchar_t *cp, *dp;
int i, w;
for (;;) {
c = getwc(f);
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(f);
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:
w = wcwidth(c);
if (outcol + w > 132) {
outcol++;
continue;
}
cp = &page[outline][outcol];
outcol += w;
if (c == '_') {
if (suppresul)
continue;
cp += 132;
c = '-';
}
if (*cp == 0) {
/* trick! */
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)
continue;
for (i=0; i<w; i++)
cp[i] = c;
}
}
continue;
}
}
}
int plus(wchar_t c, wchar_t d)
{
return (c == '|' && (d == '-' || d == '_'));
}
int first;
void pflush(int ol)
{
register int i;
register 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) {
if ((w = wcwidth(*cp)) > 0) {
putwchar(*cp);
cp += w;
} else
cp++;
}
putwchar('\n');
}
bcopy(page[ol], page, (267 - ol) * 132 * sizeof(wchar_t));
bzero(page[267- ol], ol * 132 * sizeof(wchar_t));
outline -= ol;
outcol = 0;
first = 1;
}
void move(int l, int m)
{
register 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;
}
}