295 lines
7.1 KiB
C
295 lines
7.1 KiB
C
/*
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* Copyright (C) 2016 Sami Kerola <kerolasa@iki.fi>
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* Copyright (C) 2016 Karel Zak <kzak@redhat.com>
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*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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/*
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* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
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* added Native Language Support
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* 1999-09-19 Bruno Haible <haible@clisp.cons.org>
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* modified to work correctly in multi-byte locales
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include "nls.h"
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#include "c.h"
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#include "widechar.h"
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#include "closestream.h"
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/*
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* colcrt - replaces col for crts with new nroff esp. when using tbl.
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* Bill Joy UCB July 14, 1977
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*
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* This filter uses the up and down sequences generated by the new
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* nroff when used with tbl and by \u \d and \r.
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* General overstriking doesn't work correctly.
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* Underlining is split onto multiple lines, etc.
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*
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* Option - suppresses all underlining.
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* Option -2 forces printing of all half lines.
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*/
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enum { OUTPUT_COLS = 132 };
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struct colcrt_control {
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FILE *f;
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wchar_t line[OUTPUT_COLS + 1];
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wchar_t line_under[OUTPUT_COLS + 1];
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unsigned int print_nl:1,
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need_line_under:1,
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no_underlining:1,
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half_lines:1;
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};
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static void __attribute__((__noreturn__)) usage(void)
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{
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FILE *out = stdout;
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fputs(USAGE_HEADER, out);
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fprintf(out, _(" %s [options] [<file>...]\n"), program_invocation_short_name);
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fputs(USAGE_SEPARATOR, out);
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fputs(_("Filter nroff output for CRT previewing.\n"), out);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -, --no-underlining suppress all underlining\n"), out);
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fputs(_(" -2, --half-lines print all half-lines\n"), out);
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fputs(USAGE_SEPARATOR, out);
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printf(USAGE_HELP_OPTIONS(25));
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printf(USAGE_MAN_TAIL("colcrt(1)"));
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exit(EXIT_SUCCESS);
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}
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static void trim_trailing_spaces(wchar_t *s)
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{
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size_t size;
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wchar_t *end;
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size = wcslen(s);
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if (!size)
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return;
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end = s + size - 1;
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while (s <= end && iswspace(*end))
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end--;
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*(end + 1) = L'\0';
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}
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static void output_lines(struct colcrt_control *ctl, int col)
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{
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/* first line */
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trim_trailing_spaces(ctl->line);
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fputws(ctl->line, stdout);
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if (ctl->print_nl)
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fputwc(L'\n', stdout);
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if (!ctl->half_lines && !ctl->no_underlining)
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ctl->print_nl = 0;
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wmemset(ctl->line, L'\0', OUTPUT_COLS);
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/* second line */
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if (ctl->need_line_under) {
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ctl->need_line_under = 0;
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ctl->line_under[col] = L'\0';
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trim_trailing_spaces(ctl->line_under);
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fputws(ctl->line_under, stdout);
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fputwc(L'\n', stdout);
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wmemset(ctl->line_under, L' ', OUTPUT_COLS);
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} else if (ctl->half_lines && 0 < col)
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fputwc(L'\n', stdout);
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}
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static int rubchars(struct colcrt_control *ctl, int col, int n)
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{
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while (0 < n && 0 < col) {
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ctl->line[col] = L'\0';
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ctl->line_under[col] = L' ';
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n--;
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col--;
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}
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return col;
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}
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static void colcrt(struct colcrt_control *ctl)
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{
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int col;
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wint_t c;
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long old_pos;
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ctl->print_nl = 1;
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if (ctl->half_lines)
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fputwc(L'\n', stdout);
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for (col = 0; /* nothing */; col++) {
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if (OUTPUT_COLS - 1 < col) {
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output_lines(ctl, col);
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errno = 0;
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old_pos = ftell(ctl->f);
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while ((c = getwc(ctl->f)) != L'\n') {
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long new_pos = ftell(ctl->f);
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if (old_pos == new_pos)
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fseek(ctl->f, 1, SEEK_CUR);
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else
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old_pos = new_pos;
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if (errno == 0 && c == WEOF)
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return;
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else
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errno = 0;
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}
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col = -1;
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continue;
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}
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c = getwc(ctl->f);
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switch (c) {
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case 033: /* ESC */
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c = getwc(ctl->f);
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if (c == L'8') {
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col = rubchars(ctl, col, 1);
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continue;
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}
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if (c == L'7') {
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col = rubchars(ctl, col, 2);
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continue;
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}
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continue;
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case WEOF:
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ctl->print_nl = 0;
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output_lines(ctl, col);
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return;
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case L'\n':
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output_lines(ctl, col);
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col = -1;
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continue;
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case L'\t':
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for (/* nothing */; col % 8 && col < OUTPUT_COLS; col++) {
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ctl->line[col] = L' ';
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}
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col--;
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continue;
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case L'_':
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ctl->line[col] = L' ';
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if (!ctl->no_underlining) {
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ctl->need_line_under = 1;
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ctl->line_under[col] = L'-';
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}
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continue;
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default:
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if (!iswprint(c)) {
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col--;
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continue;
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}
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ctl->print_nl = 1;
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ctl->line[col] = c;
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}
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}
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}
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int main(int argc, char **argv)
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{
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struct colcrt_control ctl = { NULL };
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int opt;
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enum { NO_UL_OPTION = CHAR_MAX + 1 };
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static const struct option longopts[] = {
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{"no-underlining", no_argument, NULL, NO_UL_OPTION},
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{"half-lines", no_argument, NULL, '2'},
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{"version", no_argument, NULL, 'V'},
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{"help", no_argument, NULL, 'h'},
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{NULL, 0, NULL, 0}
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};
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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close_stdout_atexit();
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/* Take care of lonely hyphen option. */
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for (opt = 0; opt < argc; opt++) {
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if (argv[opt][0] == '-' && argv[opt][1] == '\0') {
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ctl.no_underlining = 1;
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argc--;
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memmove(argv + opt, argv + opt + 1,
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sizeof(char *) * (argc - opt));
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opt--;
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}
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}
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while ((opt = getopt_long(argc, argv, "2Vh", longopts, NULL)) != -1) {
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switch (opt) {
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case NO_UL_OPTION:
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ctl.no_underlining = 1;
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break;
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case '2':
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ctl.half_lines = 1;
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break;
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case 'V':
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print_version(EXIT_SUCCESS);
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case 'h':
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usage();
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default:
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errtryhelp(EXIT_FAILURE);
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}
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}
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argc -= optind;
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argv += optind;
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do {
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wmemset(ctl.line, L'\0', OUTPUT_COLS);
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wmemset(ctl.line_under, L' ', OUTPUT_COLS);
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if (argc > 0) {
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if (!(ctl.f = fopen(*argv, "r")))
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err(EXIT_FAILURE, _("cannot open %s"), *argv);
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argc--;
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argv++;
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} else
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ctl.f = stdin;
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colcrt(&ctl);
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if (ctl.f != stdin)
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fclose(ctl.f);
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} while (argc > 0);
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return EXIT_SUCCESS;
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}
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