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/*
* termsbr.c -- termcap support
*
* 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>
#include <h/utils.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <curses.h>
#include <term.h>
#ifdef WINSIZE_IN_PTEM
# include <sys/stream.h>
# include <sys/ptem.h>
#endif
static int initLI = 0;
static int initCO = 0;
static int LI = 40; /* number of lines */
static int CO = 80; /* number of colums */
static char *ti_clear = NULL; /* terminfo string to clear screen */
static char *ti_standend = NULL; /* terminfo string to end standout mode */
static char *ti_standbegin = NULL; /* terminfo string to begin standout mode */
static int termstatus = 0; /* terminfo initialization status */
static char *termcbuf = NULL; /* tputs() output buffer */
static char *termcbufp = NULL; /* tputs() output buffer pointer */
static size_t termcbufsz = 0; /* Size of termcbuf */
static void initialize_terminfo(void);
static int termbytes(TPUTS_PUTC_ARG);
/*
* Initialize the terminfo library.
*/
static void
initialize_terminfo(void)
{
int errret, rc;
if (termstatus)
return;
rc = setupterm(NULL, fileno(stdout), &errret);
if (rc != 0 || errret != 1) {
termstatus = -1;
return;
} else {
termstatus = 1;
}
if (!initCO && (CO = tigetnum ("cols")) <= 0)
CO = 80;
if (!initLI && (LI = tigetnum ("lines")) <= 0)
LI = 24;
ti_clear = tigetstr ("clear");
ti_standbegin = tigetstr ("smso");
ti_standend = tigetstr ("rmso");
}
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 */
initialize_terminfo();
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 */
initialize_terminfo();
return LI;
}
static int
outc (TPUTS_PUTC_ARG c)
{
return putchar(c);
}
void
nmh_clear_screen (void)
{
initialize_terminfo ();
if (ti_clear)
tputs (ti_clear, LI, outc);
else {
printf ("\f");
}
fflush (stdout);
}
/*
* print in standout mode
*/
int
SOprintf (char *fmt, ...)
{
va_list ap;
initialize_terminfo ();
if (!(ti_standbegin && ti_standend))
return NOTOK;
tputs (ti_standbegin, 1, outc);
va_start(ap, fmt);
vprintf (fmt, ap);
va_end(ap);
tputs (ti_standend, 1, outc);
return OK;
}
/*
* Return the specified capability as a string that has already been
* processed with tputs().
*/
char *
get_term_stringcap(char *capability)
{
char *parm;
initialize_terminfo();
if (termstatus == -1)
return NULL;
termcbufp = termcbuf;
parm = tigetstr(capability);
if (parm == (char *) -1 || parm == NULL) {
return NULL;
}
tputs(parm, 1, termbytes);
*termcbufp = '\0';
return termcbuf;
}
/*
* Return a parameterized terminfo capability
*/
char *
get_term_stringparm(char *capability, long arg1, long arg2)
{
char *parm;
initialize_terminfo();
if (termstatus == -1)
return NULL;
termcbufp = termcbuf;
parm = tigetstr(capability);
if (parm == (char *) -1 || parm == NULL) {
return NULL;
}
parm = tparm(parm, arg1, arg2, 0, 0, 0, 0, 0, 0, 0);
tputs(parm, 1, termbytes);
*termcbufp = '\0';
return termcbuf;
}
/*
* Return the value of the specified numeric capability
*/
int
get_term_numcap(char *capability)
{
initialize_terminfo();
if (termstatus == -1)
return -1;
return tigetnum(capability);
}
/*
* Store a sequence of characters in our local buffer
*/
static int
termbytes(TPUTS_PUTC_ARG c)
{
size_t offset;
/*
* Bump up the buffer size if we've reached the end (leave room for
* a trailing NUL)
*/
if ((offset = termcbufp - termcbuf) - 1 >= termcbufsz) {
termcbufsz += 64;
termcbuf = mh_xrealloc(termcbuf, termcbufsz);
termcbufp = termcbuf + offset;
}
*termcbufp++ = c;
return 0;
}
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