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-rw-r--r--text-utils/colcrt.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/text-utils/colcrt.c b/text-utils/colcrt.c
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+/*
+ * Copyright (C) 2016 Sami Kerola <kerolasa@iki.fi>
+ * Copyright (C) 2016 Karel Zak <kzak@redhat.com>
+ *
+ * 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 Miśkiewicz <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 <getopt.h>
+
+#include "nls.h"
+#include "c.h"
+#include "widechar.h"
+#include "closestream.h"
+
+/*
+ * colcrt - replaces col for crts with new nroff esp. when using tbl.
+ * Bill Joy UCB July 14, 1977
+ *
+ * This filter uses 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.
+ */
+
+enum { OUTPUT_COLS = 132 };
+
+struct colcrt_control {
+ FILE *f;
+ wchar_t line[OUTPUT_COLS + 1];
+ wchar_t line_under[OUTPUT_COLS + 1];
+ unsigned int print_nl:1,
+ need_line_under:1,
+ no_underlining:1,
+ half_lines:1;
+};
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(" %s [options] [<file>...]\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Filter nroff output for CRT previewing.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -, --no-underlining suppress all underlining\n"), out);
+ fputs(_(" -2, --half-lines print all half-lines\n"), out);
+
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(25));
+
+ printf(USAGE_MAN_TAIL("colcrt(1)"));
+
+ exit(EXIT_SUCCESS);
+}
+
+static void trim_trailing_spaces(wchar_t *s)
+{
+ size_t size;
+ wchar_t *end;
+
+ size = wcslen(s);
+ if (!size)
+ return;
+ end = s + size - 1;
+ while (s <= end && iswspace(*end))
+ end--;
+ *(end + 1) = L'\0';
+}
+
+
+static void output_lines(struct colcrt_control *ctl, int col)
+{
+ /* first line */
+ trim_trailing_spaces(ctl->line);
+ fputws(ctl->line, stdout);
+
+ if (ctl->print_nl)
+ fputwc(L'\n', stdout);
+ if (!ctl->half_lines && !ctl->no_underlining)
+ ctl->print_nl = 0;
+
+ wmemset(ctl->line, L'\0', OUTPUT_COLS);
+
+ /* second line */
+ if (ctl->need_line_under) {
+ ctl->need_line_under = 0;
+ ctl->line_under[col] = L'\0';
+ trim_trailing_spaces(ctl->line_under);
+ fputws(ctl->line_under, stdout);
+ fputwc(L'\n', stdout);
+ wmemset(ctl->line_under, L' ', OUTPUT_COLS);
+
+ } else if (ctl->half_lines && 0 < col)
+ fputwc(L'\n', stdout);
+}
+
+static int rubchars(struct colcrt_control *ctl, int col, int n)
+{
+ while (0 < n && 0 < col) {
+ ctl->line[col] = L'\0';
+ ctl->line_under[col] = L' ';
+ n--;
+ col--;
+ }
+ return col;
+}
+
+static void colcrt(struct colcrt_control *ctl)
+{
+ int col;
+ wint_t c;
+ long old_pos;
+
+ ctl->print_nl = 1;
+ if (ctl->half_lines)
+ fputwc(L'\n', stdout);
+
+ for (col = 0; /* nothing */; col++) {
+ if (OUTPUT_COLS - 1 < col) {
+ output_lines(ctl, col);
+ errno = 0;
+ old_pos = ftell(ctl->f);
+ while ((c = getwc(ctl->f)) != L'\n') {
+ long new_pos = ftell(ctl->f);
+ if (old_pos == new_pos)
+ fseek(ctl->f, 1, SEEK_CUR);
+ else
+ old_pos = new_pos;
+ if (errno == 0 && c == WEOF)
+ return;
+ else
+ errno = 0;
+ }
+ col = -1;
+ continue;
+ }
+ c = getwc(ctl->f);
+ switch (c) {
+ case 033: /* ESC */
+ c = getwc(ctl->f);
+ if (c == L'8') {
+ col = rubchars(ctl, col, 1);
+ continue;
+ }
+ if (c == L'7') {
+ col = rubchars(ctl, col, 2);
+ continue;
+ }
+ continue;
+ case WEOF:
+ ctl->print_nl = 0;
+ output_lines(ctl, col);
+ return;
+ case L'\n':
+ output_lines(ctl, col);
+ col = -1;
+ continue;
+ case L'\t':
+ for (/* nothing */; col % 8 && col < OUTPUT_COLS; col++) {
+ ctl->line[col] = L' ';
+ }
+ col--;
+ continue;
+ case L'_':
+ ctl->line[col] = L' ';
+ if (!ctl->no_underlining) {
+ ctl->need_line_under = 1;
+ ctl->line_under[col] = L'-';
+ }
+ continue;
+ default:
+ if (!iswprint(c)) {
+ col--;
+ continue;
+ }
+ ctl->print_nl = 1;
+ ctl->line[col] = c;
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ struct colcrt_control ctl = { NULL };
+ int opt;
+ enum { NO_UL_OPTION = CHAR_MAX + 1 };
+
+ static const struct option longopts[] = {
+ {"no-underlining", no_argument, NULL, NO_UL_OPTION},
+ {"half-lines", no_argument, NULL, '2'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ /* Take care of lonely hyphen option. */
+ for (opt = 0; opt < argc; opt++) {
+ if (argv[opt][0] == '-' && argv[opt][1] == '\0') {
+ ctl.no_underlining = 1;
+ argc--;
+ memmove(argv + opt, argv + opt + 1,
+ sizeof(char *) * (argc - opt));
+ opt--;
+ }
+ }
+
+ while ((opt = getopt_long(argc, argv, "2Vh", longopts, NULL)) != -1) {
+ switch (opt) {
+ case NO_UL_OPTION:
+ ctl.no_underlining = 1;
+ break;
+ case '2':
+ ctl.half_lines = 1;
+ break;
+ case 'V':
+ printf(UTIL_LINUX_VERSION);
+ return EXIT_SUCCESS;
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ do {
+ wmemset(ctl.line, L'\0', OUTPUT_COLS);
+ wmemset(ctl.line_under, L' ', OUTPUT_COLS);
+
+ if (argc > 0) {
+ if (!(ctl.f = fopen(*argv, "r")))
+ err(EXIT_FAILURE, _("cannot open %s"), *argv);
+ argc--;
+ argv++;
+ } else
+ ctl.f = stdin;
+
+ colcrt(&ctl);
+ if (ctl.f != stdin)
+ fclose(ctl.f);
+ } while (argc > 0);
+
+ return EXIT_SUCCESS;
+}
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