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/*
* termsbr.c -- termcap support
*
* $Id: termsbr.c,v 1.5 2008/04/11 14:12:55 opk Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <h/mh.h>
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#else
# ifdef HAVE_TERMIO_H
# include <termio.h>
# else
# include <sgtty.h>
# endif
#endif
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
/* <sys/ioctl.h> is need anyway for ioctl()
#ifdef GWINSZ_IN_SYS_IOCTL
*/
# include <sys/ioctl.h>
/*
#endif
*/
#ifdef WINSIZE_IN_PTEM
# include <sys/stream.h>
# include <sys/ptem.h>
#endif
#if BUFSIZ<2048
# define TXTSIZ 2048
#else
# define TXTSIZ BUFSIZ
#endif
/*
* These variables are sometimes defined in,
* and needed by the termcap library.
*/
#ifdef HAVE_OSPEED
# ifdef MUST_DEFINE_OSPEED
extern short ospeed;
extern char PC;
# endif
#else
short ospeed;
char PC;
#endif
static long speedcode;
static int initLI = 0;
static int initCO = 0;
static int HC = 0; /* are we on a hardcopy terminal? */
static int LI = 40; /* number of lines */
static int CO = 80; /* number of colums */
static char *CL = NULL; /* termcap string to clear screen */
static char *SE = NULL; /* termcap string to end standout mode */
static char *SO = NULL; /* termcap string to begin standout mode */
static char termcap[TXTSIZ];
static void
read_termcap(void)
{
char *bp, *cp;
char *term;
#ifndef TGETENT_ACCEPTS_NULL
char termbuf[TXTSIZ];
#endif
#ifdef HAVE_TERMIOS_H
struct termios tio;
#else
# ifdef HAVE_TERMIO_H
struct termio tio;
# else
struct sgttyb tio;
# endif
#endif
static int inited = 0;
if (inited++)
return;
if (!(term = getenv ("TERM")))
return;
/*
* If possible, we let tgetent allocate its own termcap buffer
*/
#ifdef TGETENT_ACCEPTS_NULL
if (tgetent (NULL, term) != TGETENT_SUCCESS)
return;
#else
if (tgetent (termbuf, term) != TGETENT_SUCCESS)
return;
#endif
#ifdef HAVE_TERMIOS_H
speedcode = cfgetospeed(&tio);
#else
# ifdef HAVE_TERMIO_H
speedcode = ioctl(fileno(stdout), TCGETA, &tio) != NOTOK ? tio.c_cflag & CBAUD : 0;
# else
speedcode = ioctl(fileno(stdout), TIOCGETP, (char *) &tio) != NOTOK ? tio.sg_ospeed : 0;
# endif
#endif
HC = tgetflag ("hc");
if (!initCO && (CO = tgetnum ("co")) <= 0)
CO = 80;
if (!initLI && (LI = tgetnum ("li")) <= 0)
LI = 24;
cp = termcap;
CL = tgetstr ("cl", &cp);
if ((bp = tgetstr ("pc", &cp)))
PC = *bp;
if (tgetnum ("sg") <= 0) {
SE = tgetstr ("se", &cp);
SO = tgetstr ("so", &cp);
}
}
int
sc_width (void)
{
#ifdef TIOCGWINSZ
struct winsize win;
int width;
if (ioctl (fileno (stderr), TIOCGWINSZ, &win) != NOTOK
&& (width = win.ws_col) > 0) {
CO = width;
initCO++;
} else
#endif /* TIOCGWINSZ */
read_termcap();
return CO;
}
int
sc_length (void)
{
#ifdef TIOCGWINSZ
struct winsize win;
if (ioctl (fileno (stderr), TIOCGWINSZ, &win) != NOTOK
&& (LI = win.ws_row) > 0)
initLI++;
else
#endif /* TIOCGWINSZ */
read_termcap();
return LI;
}
static int
outc (int c)
{
return putchar(c);
}
void
clear_screen (void)
{
read_termcap ();
if (CL && speedcode)
tputs (CL, LI, outc);
else {
printf ("\f");
if (speedcode)
printf ("\200");
}
fflush (stdout);
}
/*
* print in standout mode
*/
int
SOprintf (char *fmt, ...)
{
va_list ap;
read_termcap ();
if (!(SO && SE))
return NOTOK;
tputs (SO, 1, outc);
va_start(ap, fmt);
vprintf (fmt, ap);
va_end(ap);
tputs (SE, 1, outc);
return OK;
}
/*
* Is this a hardcopy terminal?
*/
int
sc_hardcopy(void)
{
read_termcap();
return HC;
}
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