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/*
* 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.
*/
/*
* modified by Kars de Jong <jongk@cs.utwente.nl>
* to use terminfo instead of termcap.
* 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 <unistd.h> /* for getopt(), isatty() */
#include <string.h> /* for memset(), strcpy() */
#include <term.h> /* for setupterm() */
#include <stdlib.h> /* for getenv() */
#include <limits.h> /* for INT_MAX */
#include <signal.h> /* for signal() */
#include <errno.h>
#include <getopt.h>
#include "nls.h"
#include "xalloc.h"
#include "widechar.h"
#include "c.h"
#include "closestream.h"
#ifdef HAVE_WIDECHAR
/* Output an ASCII character as a wide character */
static int put1wc(int c)
{
if (putwchar(c) == WEOF)
return EOF;
else
return c;
}
#define putwp(s) tputs(s, STDOUT_FILENO, put1wc)
#else
#define putwp(s) putp(s)
#endif
static void usage(FILE *out);
static int handle_escape(FILE * f);
static void filter(FILE *f);
static void flushln(void);
static void overstrike(void);
static void iattr(void);
static void initbuf(void);
static void fwd(void);
static void reverse(void);
static void initinfo(void);
static void outc(wint_t c, int width);
static void setmode(int newmode);
static void setcol(int newcol);
static void needcol(int col);
static void sig_handler(int signo);
static void print_out(char *line);
#define IESC '\033'
#define SO '\016'
#define SI '\017'
#define HFWD '9'
#define HREV '8'
#define FREV '7'
#define NORMAL 000
#define ALTSET 001 /* Reverse */
#define SUPERSC 002 /* Dim */
#define SUBSC 004 /* Dim | Ul */
#define UNDERL 010 /* Ul */
#define BOLD 020 /* Bold */
int must_use_uc, must_overstrike;
char *CURS_UP,
*CURS_RIGHT,
*CURS_LEFT,
*ENTER_STANDOUT,
*EXIT_STANDOUT,
*ENTER_UNDERLINE,
*EXIT_UNDERLINE,
*ENTER_DIM,
*ENTER_BOLD,
*ENTER_REVERSE,
*UNDER_CHAR,
*EXIT_ATTRIBUTES;
struct CHAR {
char c_mode;
wchar_t c_char;
int c_width;
};
struct CHAR *obuf;
int obuflen;
int col, maxcol;
int mode;
int halfpos;
int upln;
int iflag;
static void __attribute__((__noreturn__))
usage(FILE *out)
{
fprintf(out, _(
"\nUsage:\n"
" %s [options] [file...]\n"), program_invocation_short_name);
fprintf(out, _(
"\nOptions:\n"
" -t, --terminal TERMINAL override the TERM environment variable\n"
" -i, --indicated underlining is indicated via a separate line\n"
" -V, --version output version information and exit\n"
" -h, --help display this help and exit\n\n"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int c, ret, tflag = 0;
char *termtype;
FILE *f;
static const struct option longopts[] = {
{ "terminal", required_argument, 0, 't' },
{ "indicated", no_argument, 0, 'i' },
{ "version", no_argument, 0, 'V' },
{ "help", no_argument, 0, 'h' },
{ NULL, 0, 0, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
termtype = getenv("TERM");
/*
* FIXME: why terminal type is lpr when command begins with c and has
* no terminal? If this behavior can be explained please insert
* reference or remove the code. In case this truly is desired command
* behavior this should be mentioned in manual page.
*/
if (termtype == NULL || (argv[0][0] == 'c' && !isatty(STDOUT_FILENO)))
termtype = "lpr";
while ((c = getopt_long(argc, argv, "it:T:Vh", longopts, NULL)) != -1)
switch (c) {
case 't':
case 'T':
/* for nroff compatibility */
termtype = optarg;
tflag = 1;
break;
case 'i':
iflag = 1;
break;
case 'V':
printf(_("%s from %s\n"), program_invocation_short_name,
PACKAGE_STRING);
return EXIT_SUCCESS;
case 'h':
usage(stdout);
default:
usage(stderr);
}
setupterm(termtype, STDOUT_FILENO, &ret);
switch (ret) {
case 1:
break;
default:
warnx(_("trouble reading terminfo"));
/* fall through to ... */
case 0:
if (tflag)
warnx(_("terminal `%s' is not known, defaulting to `dumb'"),
termtype);
setupterm("dumb", STDOUT_FILENO, (int *)0);
break;
}
initinfo();
if ((tigetflag("os") && ENTER_BOLD==NULL ) ||
(tigetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
must_overstrike = 1;
initbuf();
if (optind == argc)
filter(stdin);
else
for (; optind < argc; optind++) {
f = fopen(argv[optind],"r");
if (!f)
err(EXIT_FAILURE, _("cannot open %s"),
argv[optind]);
filter(f);
fclose(f);
}
free(obuf);
return EXIT_SUCCESS;
}
static int handle_escape(FILE * f)
{
wint_t c;
switch (c = getwc(f)) {
case HREV:
if (halfpos == 0) {
mode |= SUPERSC;
halfpos--;
} else if (halfpos > 0) {
mode &= ~SUBSC;
halfpos--;
} else {
halfpos = 0;
reverse();
}
return 0;
case HFWD:
if (halfpos == 0) {
mode |= SUBSC;
halfpos++;
} else if (halfpos < 0) {
mode &= ~SUPERSC;
halfpos++;
} else {
halfpos = 0;
fwd();
}
return 0;
case FREV:
reverse();
return 0;
default:
/* unknown escape */
ungetwc(c, f);
return 1;
}
}
static void filter(FILE *f)
{
wint_t c;
int i, w;
while ((c = getwc(f)) != WEOF)
switch (c) {
case '\b':
setcol(col - 1);
continue;
case '\t':
setcol((col+8) & ~07);
continue;
case '\r':
setcol(0);
continue;
case SO:
mode |= ALTSET;
continue;
case SI:
mode &= ~ALTSET;
continue;
case IESC:
if(handle_escape(f)) {
c = getwc(f);
errx(EXIT_FAILURE,
_("unknown escape sequence in input: %o, %o"),
IESC, c);
}
continue;
case '_':
if (obuf[col].c_char || obuf[col].c_width < 0) {
while(col > 0 && obuf[col].c_width < 0)
col--;
w = obuf[col].c_width;
for (i = 0; i < w; i++)
obuf[col++].c_mode |= UNDERL | mode;
setcol(col);
continue;
}
obuf[col].c_char = '_';
obuf[col].c_width = 1;
/* fall through */
case ' ':
setcol(col + 1);
continue;
case '\n':
flushln();
continue;
case '\f':
flushln();
putwchar('\f');
continue;
default:
if (!iswprint(c))
/* non printable */
continue;
w = wcwidth(c);
needcol(col + w);
if (obuf[col].c_char == '\0') {
obuf[col].c_char = c;
for (i = 0; i < w; i++)
obuf[col+i].c_mode = mode;
obuf[col].c_width = w;
for (i = 1; i < w; i++)
obuf[col+i].c_width = -1;
} else if (obuf[col].c_char == '_') {
obuf[col].c_char = c;
for (i = 0; i < w; i++)
obuf[col+i].c_mode |= UNDERL|mode;
obuf[col].c_width = w;
for (i = 1; i < w; i++)
obuf[col+i].c_width = -1;
} else if ((wint_t) obuf[col].c_char == c) {
for (i = 0; i < w; i++)
obuf[col+i].c_mode |= BOLD|mode;
} else {
w = obuf[col].c_width;
for (i = 0; i < w; i++)
obuf[col+i].c_mode = mode;
}
setcol(col + w);
continue;
}
if (maxcol)
flushln();
}
static void flushln(void)
{
int lastmode;
int i;
int hadmodes = 0;
lastmode = NORMAL;
for (i = 0; i < maxcol; i++) {
if (obuf[i].c_mode != lastmode) {
hadmodes++;
setmode(obuf[i].c_mode);
lastmode = obuf[i].c_mode;
}
if (obuf[i].c_char == '\0') {
if (upln) {
print_out(CURS_RIGHT);
} else
outc(' ', 1);
} else
outc(obuf[i].c_char, obuf[i].c_width);
if (obuf[i].c_width > 1)
i += obuf[i].c_width - 1;
}
if (lastmode != NORMAL) {
setmode(0);
}
if (must_overstrike && hadmodes)
overstrike();
putwchar('\n');
if (iflag && hadmodes)
iattr();
fflush(stdout);
if (upln)
upln--;
initbuf();
}
/*
* For terminals that can overstrike, overstrike underlines and bolds.
* We don't do anything with halfline ups and downs, or Greek.
*/
static void overstrike(void)
{
register int i;
#ifdef __GNUC__
register wchar_t *lbuf = __builtin_alloca((maxcol + 1) * sizeof(wchar_t));
#else
wchar_t lbuf[BUFSIZ];
#endif
register wchar_t *cp = lbuf;
int hadbold=0;
/* Set up overstrike buffer */
for (i = 0; i < maxcol; i++)
switch (obuf[i].c_mode) {
case NORMAL:
default:
*cp++ = ' ';
break;
case UNDERL:
*cp++ = '_';
break;
case BOLD:
*cp++ = obuf[i].c_char;
if (obuf[i].c_width > 1)
i += obuf[i].c_width - 1;
hadbold=1;
break;
}
putwchar('\r');
for (*cp = ' '; *cp == ' '; cp--)
*cp = 0;
for (cp = lbuf; *cp; cp++)
putwchar(*cp);
if (hadbold) {
putwchar('\r');
for (cp = lbuf; *cp; cp++)
putwchar(*cp == '_' ? ' ' : *cp);
putwchar('\r');
for (cp = lbuf; *cp; cp++)
putwchar(*cp == '_' ? ' ' : *cp);
}
}
static void iattr(void)
{
register int i;
#ifdef __GNUC__
register char *lbuf = __builtin_alloca((maxcol+1)*sizeof(char));
#else
char lbuf[BUFSIZ];
#endif
register char *cp = lbuf;
for (i = 0; i < maxcol; i++)
switch (obuf[i].c_mode) {
case NORMAL: *cp++ = ' '; break;
case ALTSET: *cp++ = 'g'; break;
case SUPERSC: *cp++ = '^'; break;
case SUBSC: *cp++ = 'v'; break;
case UNDERL: *cp++ = '_'; break;
case BOLD: *cp++ = '!'; break;
default: *cp++ = 'X'; break;
}
for (*cp = ' '; *cp == ' '; cp--)
*cp = 0;
for (cp = lbuf; *cp; cp++)
putwchar(*cp);
putwchar('\n');
}
static void initbuf(void)
{
if (obuf == NULL) {
/* First time. */
obuflen = BUFSIZ;
obuf = xmalloc(sizeof(struct CHAR) * obuflen);
}
/* assumes NORMAL == 0 */
memset(obuf, 0, sizeof(struct CHAR) * obuflen);
setcol(0);
maxcol = 0;
mode &= ALTSET;
}
static void fwd(void)
{
int oldcol, oldmax;
oldcol = col;
oldmax = maxcol;
flushln();
setcol(oldcol);
maxcol = oldmax;
}
static void reverse(void)
{
upln++;
fwd();
print_out(CURS_UP);
print_out(CURS_UP);
upln++;
}
static void initinfo(void)
{
CURS_UP = tigetstr("cuu1");
CURS_RIGHT = tigetstr("cuf1");
CURS_LEFT = tigetstr("cub1");
if (CURS_LEFT == NULL)
CURS_LEFT = "\b";
ENTER_STANDOUT = tigetstr("smso");
EXIT_STANDOUT = tigetstr("rmso");
ENTER_UNDERLINE = tigetstr("smul");
EXIT_UNDERLINE = tigetstr("rmul");
ENTER_DIM = tigetstr("dim");
ENTER_BOLD = tigetstr("bold");
ENTER_REVERSE = tigetstr("rev");
EXIT_ATTRIBUTES = tigetstr("sgr0");
if (!ENTER_BOLD && ENTER_REVERSE)
ENTER_BOLD = ENTER_REVERSE;
if (!ENTER_BOLD && ENTER_STANDOUT)
ENTER_BOLD = ENTER_STANDOUT;
if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
ENTER_UNDERLINE = ENTER_STANDOUT;
EXIT_UNDERLINE = EXIT_STANDOUT;
}
if (!ENTER_DIM && ENTER_STANDOUT)
ENTER_DIM = ENTER_STANDOUT;
if (!ENTER_REVERSE && ENTER_STANDOUT)
ENTER_REVERSE = ENTER_STANDOUT;
if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
EXIT_ATTRIBUTES = EXIT_STANDOUT;
/*
* Note that we use REVERSE for the alternate character set,
* not the as/ae capabilities. This is because we are modelling
* the model 37 teletype (since that's what nroff outputs) and
* the typical as/ae is more of a graphics set, not the greek
* letters the 37 has.
*/
UNDER_CHAR = tigetstr("uc");
must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
}
static int curmode = 0;
static void outc(wint_t c, int width) {
int i;
putwchar(c);
if (must_use_uc && (curmode&UNDERL)) {
for (i = 0; i < width; i++)
print_out(CURS_LEFT);
for (i = 0; i < width; i++)
print_out(UNDER_CHAR);
}
}
static void setmode(int newmode)
{
if (!iflag) {
if (curmode != NORMAL && newmode != NORMAL)
setmode(NORMAL);
switch (newmode) {
case NORMAL:
switch (curmode) {
case NORMAL:
break;
case UNDERL:
print_out(EXIT_UNDERLINE);
break;
default:
/* This includes standout */
print_out(EXIT_ATTRIBUTES);
break;
}
break;
case ALTSET:
print_out(ENTER_REVERSE);
break;
case SUPERSC:
/*
* This only works on a few terminals.
* It should be fixed.
*/
print_out(ENTER_UNDERLINE);
print_out(ENTER_DIM);
break;
case SUBSC:
print_out(ENTER_DIM);
break;
case UNDERL:
print_out(ENTER_UNDERLINE);
break;
case BOLD:
print_out(ENTER_BOLD);
break;
default:
/*
* We should have some provision here for multiple modes
* on at once. This will have to come later.
*/
print_out(ENTER_STANDOUT);
break;
}
}
curmode = newmode;
}
static void setcol(int newcol) {
col = newcol;
if (col < 0)
col = 0;
else if (col > maxcol)
needcol(col);
}
static void needcol(int acol) {
maxcol = acol;
/* If col >= obuflen, expand obuf until obuflen > col. */
while (acol >= obuflen) {
/* Paranoid check for obuflen == INT_MAX. */
if (obuflen == INT_MAX)
errx(EXIT_FAILURE, _("Input line too long."));
/* Similar paranoia: double only up to INT_MAX. */
if (obuflen < (INT_MAX / 2))
obuflen *= 2;
else
obuflen = INT_MAX;
/* Now we can try to expand obuf. */
obuf = xrealloc(obuf, sizeof(struct CHAR) * obuflen);
}
}
static void sig_handler(int signo __attribute__ ((__unused__)))
{
_exit(EXIT_SUCCESS);
}
static void print_out(char *line)
{
if (line == NULL)
return;
putwp(line);
}
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