647 lines
16 KiB
C
647 lines
16 KiB
C
/*
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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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* modified by Kars de Jong <jongk@cs.utwente.nl>
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* to use terminfo instead of termcap.
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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 <unistd.h> /* for getopt(), isatty() */
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#include <string.h> /* for memset(), strcpy() */
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#include <stdlib.h> /* for getenv() */
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#include <limits.h> /* for INT_MAX */
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#include <signal.h> /* for signal() */
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#include <errno.h>
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#include <getopt.h>
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#if defined(HAVE_NCURSESW_TERM_H)
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# include <ncursesw/term.h>
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#elif defined(HAVE_NCURSES_TERM_H)
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# include <ncurses/term.h>
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#elif defined(HAVE_TERM_H)
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# include <term.h>
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#endif
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#include "nls.h"
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#include "xalloc.h"
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#include "widechar.h"
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#include "c.h"
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#include "closestream.h"
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#define ESC '\033'
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#define SO '\016'
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#define SI '\017'
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#define HFWD '9'
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#define HREV '8'
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#define FREV '7'
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enum {
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NORMAL_CHARSET = 0, /* Must be zero, see initbuf() */
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ALTERNATIVE_CHARSET = 1 << 0, /* Reverse */
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SUPERSCRIPT = 1 << 1, /* Dim */
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SUBSCRIPT = 1 << 2, /* Dim | Ul */
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UNDERLINE = 1 << 3, /* Ul */
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BOLD = 1 << 4, /* Bold */
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};
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struct term_caps {
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char *curs_up;
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char *curs_right;
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char *curs_left;
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char *enter_standout;
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char *exit_standout;
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char *enter_underline;
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char *exit_underline;
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char *enter_dim;
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char *enter_bold;
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char *enter_reverse;
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char *under_char;
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char *exit_attributes;
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};
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struct ul_char {
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wchar_t c_char;
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int c_width;
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char c_mode;
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};
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struct ul_ctl {
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size_t column;
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size_t max_column;
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int half_position;
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int up_line;
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int mode;
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int current_mode;
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size_t buflen;
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struct ul_char *buf;
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unsigned int
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indicated_opt:1,
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must_use_uc:1,
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must_overstrike: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(_("Do underlining.\n"), out);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -t, -T, --terminal TERMINAL override the TERM environment variable\n"), out);
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fputs(_(" -i, --indicated underlining is indicated via a separate line\n"), out);
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printf(USAGE_HELP_OPTIONS(30));
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printf(USAGE_MAN_TAIL("ul(1)"));
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exit(EXIT_SUCCESS);
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}
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static void need_column(struct ul_ctl *ctl, size_t new_max)
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{
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ctl->max_column = new_max;
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while (new_max >= ctl->buflen) {
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ctl->buflen *= 2;
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ctl->buf = xrealloc(ctl->buf, sizeof(struct ul_char) * ctl->buflen);
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}
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}
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static void set_column(struct ul_ctl *ctl, size_t column)
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{
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ctl->column = column;
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if (ctl->max_column < ctl->column)
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need_column(ctl, ctl->column);
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}
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static void init_buffer(struct ul_ctl *ctl)
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{
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if (ctl->buf == NULL) {
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/* First time. */
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ctl->buflen = BUFSIZ;
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ctl->buf = xcalloc(ctl->buflen, sizeof(struct ul_char));
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} else
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/* assumes NORMAL_CHARSET == 0 */
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memset(ctl->buf, 0, sizeof(struct ul_char) * ctl->max_column);
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set_column(ctl, 0);
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ctl->max_column = 0;
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ctl->mode &= ALTERNATIVE_CHARSET;
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}
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static void init_term_caps(struct ul_ctl *ctl, struct term_caps *const tcs)
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{
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tcs->curs_up = tigetstr("cuu1");
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tcs->curs_right = tigetstr("cuf1");
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tcs->curs_left = tigetstr("cub1");
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if (tcs->curs_left == NULL)
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tcs->curs_left = "\b";
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tcs->enter_standout = tigetstr("smso");
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tcs->exit_standout = tigetstr("rmso");
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tcs->enter_underline = tigetstr("smul");
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tcs->exit_underline = tigetstr("rmul");
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tcs->enter_dim = tigetstr("dim");
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tcs->enter_bold = tigetstr("bold");
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tcs->enter_reverse = tigetstr("rev");
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tcs->exit_attributes = tigetstr("sgr0");
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if (!tcs->enter_bold && tcs->enter_reverse)
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tcs->enter_bold = tcs->enter_reverse;
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if (!tcs->enter_bold && tcs->enter_standout)
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tcs->enter_bold = tcs->enter_standout;
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if (!tcs->enter_underline && tcs->enter_standout) {
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tcs->enter_underline = tcs->enter_standout;
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tcs->exit_underline = tcs->exit_standout;
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}
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if (!tcs->enter_dim && tcs->enter_standout)
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tcs->enter_dim = tcs->enter_standout;
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if (!tcs->enter_reverse && tcs->enter_standout)
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tcs->enter_reverse = tcs->enter_standout;
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if (!tcs->exit_attributes && tcs->exit_standout)
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tcs->exit_attributes = tcs->exit_standout;
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/*
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* Note that we use REVERSE for the alternate character set,
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* not the as/ae capabilities. This is because we are modeling
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* the model 37 teletype (since that's what nroff outputs) and
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* the typical as/ae is more of a graphics set, not the greek
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* letters the 37 has.
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*/
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tcs->under_char = tigetstr("uc");
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ctl->must_use_uc = (tcs->under_char && !tcs->enter_underline);
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if ((tigetflag("os") && tcs->enter_bold == NULL) ||
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(tigetflag("ul") && tcs->enter_underline == NULL
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&& tcs->under_char == NULL))
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ctl->must_overstrike = 1;
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}
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static void sig_handler(int signo __attribute__((__unused__)))
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{
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_exit(EXIT_SUCCESS);
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}
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static int ul_putwchar(int c)
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{
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if (putwchar(c) == WEOF)
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return EOF;
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return c;
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}
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static void print_line(char *line)
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{
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if (line == NULL)
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return;
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tputs(line, STDOUT_FILENO, ul_putwchar);
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}
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static void ul_setmode(struct ul_ctl *ctl, struct term_caps const *const tcs,
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int new_mode)
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{
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if (!ctl->indicated_opt) {
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if (ctl->current_mode != NORMAL_CHARSET && new_mode != NORMAL_CHARSET)
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ul_setmode(ctl, tcs, NORMAL_CHARSET);
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switch (new_mode) {
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case NORMAL_CHARSET:
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switch (ctl->current_mode) {
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case NORMAL_CHARSET:
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break;
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case UNDERLINE:
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print_line(tcs->exit_underline);
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break;
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default:
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/* This includes standout */
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print_line(tcs->exit_attributes);
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break;
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}
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break;
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case ALTERNATIVE_CHARSET:
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print_line(tcs->enter_reverse);
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break;
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case SUPERSCRIPT:
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/*
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* This only works on a few terminals.
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* It should be fixed.
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*/
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print_line(tcs->enter_underline);
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print_line(tcs->enter_dim);
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break;
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case SUBSCRIPT:
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print_line(tcs->enter_dim);
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break;
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case UNDERLINE:
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print_line(tcs->enter_underline);
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break;
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case BOLD:
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print_line(tcs->enter_bold);
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break;
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default:
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/*
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* We should have some provision here for multiple modes
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* on at once. This will have to come later.
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*/
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print_line(tcs->enter_standout);
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break;
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}
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}
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ctl->current_mode = new_mode;
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}
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static void indicate_attribute(struct ul_ctl *ctl)
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{
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size_t i;
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wchar_t *buf = xcalloc(ctl->max_column + 1, sizeof(wchar_t));
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wchar_t *p = buf;
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for (i = 0; i < ctl->max_column; i++) {
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switch (ctl->buf[i].c_mode) {
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case NORMAL_CHARSET: *p++ = ' '; break;
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case ALTERNATIVE_CHARSET: *p++ = 'g'; break;
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case SUPERSCRIPT: *p++ = '^'; break;
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case SUBSCRIPT: *p++ = 'v'; break;
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case UNDERLINE: *p++ = '_'; break;
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case BOLD: *p++ = '!'; break;
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default: *p++ = 'X'; break;
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}
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}
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for (*p = ' '; *p == ' '; p--)
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*p = 0;
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fputws(buf, stdout);
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putwchar('\n');
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free(buf);
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}
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static void output_char(struct ul_ctl *ctl, struct term_caps const *const tcs,
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wint_t c, int width)
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{
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int i;
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putwchar(c);
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if (ctl->must_use_uc && (ctl->current_mode & UNDERLINE)) {
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for (i = 0; i < width; i++)
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print_line(tcs->curs_left);
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for (i = 0; i < width; i++)
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print_line(tcs->under_char);
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}
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}
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/*
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* For terminals that can overstrike, overstrike underlines and bolds.
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* We don't do anything with halfline ups and downs, or Greek.
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*/
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static void overstrike(struct ul_ctl *ctl)
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{
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size_t i;
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wchar_t *buf = xcalloc(ctl->max_column + 1, sizeof(wchar_t));
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wchar_t *p = buf;
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int had_bold = 0;
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/* Set up overstrike buffer */
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for (i = 0; i < ctl->max_column; i++) {
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switch (ctl->buf[i].c_mode) {
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case NORMAL_CHARSET:
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default:
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*p++ = ' ';
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break;
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case UNDERLINE:
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*p++ = '_';
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break;
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case BOLD:
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*p++ = ctl->buf[i].c_char;
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if (1 < ctl->buf[i].c_width)
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i += ctl->buf[i].c_width - 1;
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had_bold = 1;
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break;
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}
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}
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putwchar('\r');
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for (*p = ' '; *p == ' '; p--)
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*p = 0;
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fputws(buf, stdout);
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if (had_bold) {
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putwchar('\r');
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for (p = buf; *p; p++)
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putwchar(*p == '_' ? ' ' : *p);
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putwchar('\r');
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for (p = buf; *p; p++)
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putwchar(*p == '_' ? ' ' : *p);
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}
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free(buf);
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}
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static void flush_line(struct ul_ctl *ctl, struct term_caps const *const tcs)
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{
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int last_mode;
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size_t i;
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int had_mode = 0;
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last_mode = NORMAL_CHARSET;
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for (i = 0; i < ctl->max_column; i++) {
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if (ctl->buf[i].c_mode != last_mode) {
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had_mode = 1;
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ul_setmode(ctl, tcs, ctl->buf[i].c_mode);
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last_mode = ctl->buf[i].c_mode;
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}
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if (ctl->buf[i].c_char == '\0') {
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if (ctl->up_line)
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print_line(tcs->curs_right);
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else
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output_char(ctl, tcs, ' ', 1);
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} else
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output_char(ctl, tcs, ctl->buf[i].c_char, ctl->buf[i].c_width);
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if (1 < ctl->buf[i].c_width)
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i += ctl->buf[i].c_width - 1;
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}
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if (last_mode != NORMAL_CHARSET)
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ul_setmode(ctl, tcs, NORMAL_CHARSET);
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if (ctl->must_overstrike && had_mode)
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overstrike(ctl);
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putwchar('\n');
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if (ctl->indicated_opt && had_mode)
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indicate_attribute(ctl);
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fflush(stdout);
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if (ctl->up_line)
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ctl->up_line--;
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init_buffer(ctl);
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}
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static void forward(struct ul_ctl *ctl, struct term_caps const *const tcs)
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{
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int old_column, old_maximum;
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old_column = ctl->column;
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old_maximum = ctl->max_column;
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flush_line(ctl, tcs);
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set_column(ctl, old_column);
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ctl->max_column = old_maximum;
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}
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static void reverse(struct ul_ctl *ctl, struct term_caps const *const tcs)
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{
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ctl->up_line++;
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forward(ctl, tcs);
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print_line(tcs->curs_up);
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print_line(tcs->curs_up);
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ctl->up_line++;
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}
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static int handle_escape(struct ul_ctl *ctl, struct term_caps const *const tcs, FILE *f)
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{
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wint_t c;
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switch (c = getwc(f)) {
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case HREV:
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if (0 < ctl->half_position) {
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ctl->mode &= ~SUBSCRIPT;
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ctl->half_position--;
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} else if (ctl->half_position == 0) {
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ctl->mode |= SUPERSCRIPT;
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ctl->half_position--;
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} else {
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ctl->half_position = 0;
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reverse(ctl, tcs);
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}
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return 0;
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case HFWD:
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if (ctl->half_position < 0) {
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ctl->mode &= ~SUPERSCRIPT;
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ctl->half_position++;
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} else if (ctl->half_position == 0) {
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ctl->mode |= SUBSCRIPT;
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ctl->half_position++;
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} else {
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ctl->half_position = 0;
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forward(ctl, tcs);
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}
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return 0;
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case FREV:
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reverse(ctl, tcs);
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return 0;
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default:
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/* unknown escape */
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ungetwc(c, f);
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return 1;
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}
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}
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static void filter(struct ul_ctl *ctl, struct term_caps const *const tcs, FILE *f)
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{
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wint_t c;
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int i, width;
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while ((c = getwc(f)) != WEOF) {
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switch (c) {
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case '\b':
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set_column(ctl, ctl->column && 0 < ctl->column ? ctl->column - 1 : 0);
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continue;
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case '\t':
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set_column(ctl, (ctl->column + 8) & ~07);
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continue;
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case '\r':
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set_column(ctl, 0);
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continue;
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case SO:
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ctl->mode |= ALTERNATIVE_CHARSET;
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continue;
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case SI:
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ctl->mode &= ~ALTERNATIVE_CHARSET;
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continue;
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case ESC:
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if (handle_escape(ctl, tcs, f)) {
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c = getwc(f);
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errx(EXIT_FAILURE,
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_("unknown escape sequence in input: %o, %o"), ESC, c);
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}
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continue;
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case '_':
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if (ctl->buf[ctl->column].c_char || ctl->buf[ctl->column].c_width < 0) {
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while (ctl->buf[ctl->column].c_width < 0 && 0 < ctl->column)
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ctl->column--;
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width = ctl->buf[ctl->column].c_width;
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for (i = 0; i < width; i++)
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ctl->buf[ctl->column++].c_mode |= UNDERLINE | ctl->mode;
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set_column(ctl, 0 < ctl->column ? ctl->column : 0);
|
|
continue;
|
|
}
|
|
ctl->buf[ctl->column].c_char = '_';
|
|
ctl->buf[ctl->column].c_width = 1;
|
|
/* fallthrough */
|
|
case ' ':
|
|
set_column(ctl, ctl->column + 1);
|
|
continue;
|
|
case '\n':
|
|
flush_line(ctl, tcs);
|
|
continue;
|
|
case '\f':
|
|
flush_line(ctl, tcs);
|
|
putwchar('\f');
|
|
continue;
|
|
default:
|
|
if (!iswprint(c))
|
|
/* non printable */
|
|
continue;
|
|
width = wcwidth(c);
|
|
need_column(ctl, ctl->column + width);
|
|
if (ctl->buf[ctl->column].c_char == '\0') {
|
|
ctl->buf[ctl->column].c_char = c;
|
|
for (i = 0; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_mode = ctl->mode;
|
|
ctl->buf[ctl->column].c_width = width;
|
|
for (i = 1; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_width = -1;
|
|
} else if (ctl->buf[ctl->column].c_char == '_') {
|
|
ctl->buf[ctl->column].c_char = c;
|
|
for (i = 0; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_mode |= UNDERLINE | ctl->mode;
|
|
ctl->buf[ctl->column].c_width = width;
|
|
for (i = 1; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_width = -1;
|
|
} else if ((wint_t) ctl->buf[ctl->column].c_char == c) {
|
|
for (i = 0; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_mode |= BOLD | ctl->mode;
|
|
} else {
|
|
width = ctl->buf[ctl->column].c_width;
|
|
for (i = 0; i < width; i++)
|
|
ctl->buf[ctl->column + i].c_mode = ctl->mode;
|
|
}
|
|
set_column(ctl, ctl->column + width);
|
|
continue;
|
|
}
|
|
}
|
|
if (ctl->max_column)
|
|
flush_line(ctl, tcs);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int c, ret, opt_terminal = 0;
|
|
char *termtype;
|
|
struct term_caps tcs = { 0 };
|
|
struct ul_ctl ctl = { .current_mode = NORMAL_CHARSET };
|
|
FILE *f;
|
|
|
|
static const struct option longopts[] = {
|
|
{ "terminal", required_argument, NULL, 't' },
|
|
{ "indicated", no_argument, NULL, 'i' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
setlocale(LC_ALL, "");
|
|
bindtextdomain(PACKAGE, LOCALEDIR);
|
|
textdomain(PACKAGE);
|
|
close_stdout_atexit();
|
|
|
|
signal(SIGINT, sig_handler);
|
|
signal(SIGTERM, sig_handler);
|
|
|
|
termtype = getenv("TERM");
|
|
|
|
while ((c = getopt_long(argc, argv, "it:T:Vh", longopts, NULL)) != -1) {
|
|
switch (c) {
|
|
|
|
case 't':
|
|
case 'T':
|
|
/* for nroff compatibility */
|
|
termtype = optarg;
|
|
opt_terminal = 1;
|
|
break;
|
|
case 'i':
|
|
ctl.indicated_opt = 1;
|
|
break;
|
|
|
|
case 'V':
|
|
print_version(EXIT_SUCCESS);
|
|
case 'h':
|
|
usage();
|
|
default:
|
|
errtryhelp(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
setupterm(termtype, STDOUT_FILENO, &ret);
|
|
switch (ret) {
|
|
case 1:
|
|
break;
|
|
default:
|
|
warnx(_("trouble reading terminfo"));
|
|
/* fallthrough */
|
|
case 0:
|
|
if (opt_terminal)
|
|
warnx(_("terminal `%s' is not known, defaulting to `dumb'"),
|
|
termtype);
|
|
setupterm("dumb", STDOUT_FILENO, (int *)0);
|
|
break;
|
|
}
|
|
|
|
init_term_caps(&ctl, &tcs);
|
|
init_buffer(&ctl);
|
|
|
|
if (optind == argc)
|
|
filter(&ctl, &tcs, stdin);
|
|
else {
|
|
for (; optind < argc; optind++) {
|
|
f = fopen(argv[optind], "r");
|
|
if (!f)
|
|
err(EXIT_FAILURE, _("cannot open %s"), argv[optind]);
|
|
filter(&ctl, &tcs, f);
|
|
fclose(f);
|
|
}
|
|
}
|
|
|
|
free(ctl.buf);
|
|
del_curterm(cur_term);
|
|
return EXIT_SUCCESS;
|
|
}
|