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/* File: main-cap.c */
/* Purpose: Support for "term.c" using "termcap" calls */
#include "angband.h"
#ifdef USE_CAP
/*
* This file is a total hack, but is often very helpful. :-)
*
* This file allows use of the terminal without requiring the
* "curses" routines. In fact, if "USE_HARDCODE" is defined,
* this file will attempt to use various hard-coded "vt100"
* escape sequences to also avoid the use of the "termcap"
* routines. I do not know if this will work on System V.
*
* This file is intended for use only on those machines which are
* unable, for whatever reason, to compile the "main-gcu.c" file,
* but which seem to be able to support the "termcap" library, or
* which at least seem able to support "vt100" terminals.
*
* Large portions of this file were stolen from "main-gcu.c"
*
* This file incorrectly handles output to column 80, I think.
*/
/*
* Require a "system"
*/
#if !defined(USE_TERMCAP) && !defined(USE_HARDCODE)
# define USE_TERMCAP
#endif
/*
* Hack -- try to guess which systems use what commands
* Hack -- allow one of the "USE_Txxxxx" flags to be pre-set.
* Mega-Hack -- try to guess when "POSIX" is available.
* If the user defines two of these, we will probably crash.
*/
#if !defined(USE_TPOSIX)
# if !defined(USE_TERMIO) && !defined(USE_TCHARS)
# if defined(_POSIX_VERSION)
# define USE_TPOSIX
# else
# if defined(USG) || defined(linux) || defined(SOLARIS)
# define USE_TERMIO
# else
# define USE_TCHARS
# endif
# endif
# endif
#endif
/*
* POSIX stuff
*/
#ifdef USE_TPOSIX
# include <sys/ioctl.h>
# include <termios.h>
#endif
/*
* One version needs these files
*/
#ifdef USE_TERMIO
# include <sys/ioctl.h>
# include <termio.h>
#endif
/*
* The other needs these files
*/
#ifdef USE_TCHARS
# include <sys/ioctl.h>
# include <sys/resource.h>
# include <sys/param.h>
# include <sys/file.h>
# include <sys/types.h>
#endif
/*
* XXX XXX Hack -- POSIX uses "O_NONBLOCK" instead of "O_NDELAY"
*
* They should both work due to the "(i != 1)" test in the code
* which checks for the result of the "read()" command.
*/
#ifndef O_NDELAY
# define O_NDELAY O_NONBLOCK
#endif
#ifdef USE_TERMCAP
/*
* Termcap string information
*/
static char blob[1024]; /* The "termcap" entry */
static char area[1024]; /* The string extraction buffer */
static char *next = area; /* The current "index" into "area" */
static char *desc; /* The terminal name */
#endif
/*
* Pointers into the "area"
*/
static char *cm; /* Move cursor */
static char *ch; /* Move cursor to horizontal location */
static char *cv; /* Move cursor to vertical location */
static char *ho; /* Move cursor to top left */
static char *ll; /* Move cursor to bottom left */
static char *cs; /* Set scroll area */
static char *cl; /* Clear screen */
static char *cd; /* Clear to end of display */
static char *ce; /* Clear to end of line */
static char *cr; /* Move to start of line */
static char *so; /* Turn on standout */
static char *se; /* Turn off standout */
static char *md; /* Turn on bold */
static char *me; /* Turn off bold */
static char *vi; /* Cursor - invisible */
static char *ve; /* Cursor - normal */
static char *vs; /* Cursor - bright */
/*
* State variables
*/
static int rows; /* Screen size (Y) */
static int cols; /* Screen size (X) */
static int curx; /* Cursor location (X) */
static int cury; /* Cursor location (Y) */
static int curv; /* Cursor visibility */
/*
* Extern functions
*/
extern char *getenv();
extern char *tgoto();
extern char *tgetstr();
/*
* Write some chars to the terminal
*/
static void ewrite(char *str)
{
int numtowrite, numwritten;
/* See how much work we have */
numtowrite = strlen(str);
/* Write until done */
while (numtowrite > 0)
{
/* Try to write the chars */
numwritten = write(1, str, numtowrite);
/* Handle FIFOs and EINTR */
if (numwritten < 0) numwritten = 0;
/* See what we completed */
numtowrite -= numwritten;
str += numwritten;
/* Hack -- sleep if not done */
if (numtowrite > 0) sleep(1);
}
}
#ifdef USE_TERMCAP
static char write_buffer[128];
static char *write_buffer_ptr;
static void output_one(char c)
{
*write_buffer_ptr++ = c;
}
static void tp(char *s)
{
/* Dump the string into us */
write_buffer_ptr = write_buffer;
/* Write the string with padding */
tputs (s, 1, output_one);
/* Finish the string */
*write_buffer_ptr = '\0';
/* Dump the recorded buffer */
ewrite (write_buffer);
}
#endif
#ifdef USE_HARDCODE
static void tp(char *s)
{
ewrite(s);
}
#endif
/*
* Clear the screen
*/
static void do_cl(void)
{
if (cl) tp (cl);
}
/*
* Clear to the end of the line
*/
static void do_ce(void)
{
if (ce) tp(ce);
}
/*
* Set the cursor visibility (0 = invis, 1 = normal, 2 = bright)
*/
static void curs_set(int vis)
{
char *v = NULL;
if (!vis)
{
v = vi;
}
else if (vis > 1)
{
v = vs ? vs : ve;
}
else
{
v = ve ? ve : vs;
}
if (v) tp(v);
}
/*
* Restrict scrolling to within these rows
*/
static void do_cs(int y1, int y2)
{
#ifdef USE_TERMCAP
if (cs) tp(tgoto(cs, y2, y1));
#endif
#ifdef USE_HARDCODE
char temp[64];
sprintf(temp, cs, y1, y2);
tp (temp);
#endif
}
/*
* Go to the given screen location directly
*/
static void do_cm(int x, int y)
{
#ifdef USE_TERMCAP
if (cm) tp(tgoto(cm, x, y));
#endif
#ifdef USE_HARDCODE
char temp[64];
sprintf(temp, cm, y + 1, x + 1);
tp(temp);
#endif
}
/*
* Go to the given screen location in a "clever" manner
*
* XXX XXX XXX This function could use some work!
*/
static void do_move(int x1, int y1, int x2, int y2)
{
/* Hack -- unknown start location */
if ((x1 == x2) && (y1 == y2)) do_cm(x2, y2);
/* Left edge */
else if (x2 == 0)
{
if ((y2 <= 0) && ho) tp(ho);
else if ((y2 >= rows - 1) && ll) tp(ll);
else if ((y2 == y1) && cr) tp(cr);
#if 0
else if ((y2 == y1 + 1) && cr && dn)
{
tp(cr);
tp(dn);
}
else if ((y2 == y1 - 1) && cr && up)
{
tp(cr);
tp(up);
}
#endif
else do_cm(x2, y2);
}
#if 0
/* Up/Down one line */
else if ((x2 == x1) && (y2 == y1 + 1) && dn) tp(dn);
else if ((x2 == x1) && (y2 == y1 - 1) && up) tp(up);
#endif
/* Default -- go directly there */
else do_cm(x2, y2);
}
/*
* Help initialize this file (see below)
*/
errr init_cap_aux(void)
{
#ifdef USE_TERMCAP
/* Get the terminal name (if possible) */
desc = getenv("TERM");
if (!desc) return (1);
/* Get the terminal info */
if (tgetent(blob, desc) != 1) return (2);
/* Get the (initial) columns and rows, or default */
if ((cols = tgetnum("co")) == -1) cols = 80;
if ((rows = tgetnum("li")) == -1) rows = 24;
/* Find out how to move the cursor to a given location */
cm = tgetstr("cm", &next);
if (!cm) return (10);
/* Find out how to move the cursor to a given position */
ch = tgetstr("ch", &next);
cv = tgetstr("cv", &next);
/* Find out how to "home" the screen */
ho = tgetstr("ho", &next);
/* Find out how to "last-line" the screen */
ll = tgetstr("ll", &next);
/* Find out how to do a "carriage return" */
cr = tgetstr("cr", &next);
if (!cr) cr = "\r";
/* Find out how to clear the screen */
cl = tgetstr("cl", &next);
if (!cl) return (11);
/* Find out how to clear to the end of display */
cd = tgetstr("cd", &next);
/* Find out how to clear to the end of the line */
ce = tgetstr("ce", &next);
/* Find out how to scroll (set the scroll region) */
cs = tgetstr("cs", &next);
/* Find out how to hilite */
so = tgetstr("so", &next);
se = tgetstr("se", &next);
if (!so || !se) so = se = NULL;
/* Find out how to bold */
md = tgetstr("md", &next);
me = tgetstr("me", &next);
if (!md || !me) md = me = NULL;
/* Check the cursor visibility stuff */
vi = tgetstr("vi", &next);
vs = tgetstr("vs", &next);
ve = tgetstr("ve", &next);
#endif
#ifdef USE_HARDCODE
/* Assume some defualt information */
rows = 24;
cols = 80;
/* Clear screen */
cl = "\033[2J\033[H"; /* --]--]-- */
/* Clear to end of line */
ce = "\033[K"; /* --]-- */
/* Hilite on/off */
so = "\033[7m"; /* --]-- */
se = "\033[m"; /* --]-- */
/* Scroll region */
cs = "\033[%d;%dr"; /* --]-- */
/* Move cursor */
cm = "\033[%d;%dH"; /* --]-- */
#endif
/* Success */
return (0);
}
/*
* Save the "normal" and "angband" terminal settings
*/
#ifdef USE_TPOSIX
static struct termios norm_termios;
static struct termios game_termios;
#endif
#ifdef USE_TERMIO
static struct termio norm_termio;
static struct termio game_termio;
#endif
#ifdef USE_TCHARS
static struct sgttyb norm_ttyb;
static struct tchars norm_tchars;
static struct ltchars norm_ltchars;
static int norm_local_chars;
static struct sgttyb game_ttyb;
static struct tchars game_tchars;
static struct ltchars game_ltchars;
static int game_local_chars;
#endif
/*
* Are we active? Not really needed.
*/
static int active = FALSE;
/*
* The main screen (no sub-screens)
*/
static term term_screen_body;
/*
* Place the "keymap" into its "normal" state
*/
static void keymap_norm(void)
{
#ifdef USE_TPOSIX
/* restore the saved values of the special chars */
(void)tcsetattr(0, TCSAFLUSH, &norm_termios);
#endif
#ifdef USE_TERMIO
/* restore the saved values of the special chars */
(void)ioctl(0, TCSETA, (char *)&norm_termio);
#endif
#ifdef USE_TCHARS
/* restore the saved values of the special chars */
(void)ioctl(0, TIOCSETP, (char *)&norm_ttyb);
(void)ioctl(0, TIOCSETC, (char *)&norm_tchars);
(void)ioctl(0, TIOCSLTC, (char *)&norm_ltchars);
(void)ioctl(0, TIOCLSET, (char *)&norm_local_chars);
#endif
}
/*
* Place the "keymap" into the "game" state
*/
static void keymap_game(void)
{
#ifdef USE_TPOSIX
/* restore the saved values of the special chars */
(void)tcsetattr(0, TCSAFLUSH, &game_termios);
#endif
#ifdef USE_TERMIO
/* restore the saved values of the special chars */
(void)ioctl(0, TCSETA, (char *)&game_termio);
#endif
#ifdef USE_TCHARS
/* restore the saved values of the special chars */
(void)ioctl(0, TIOCSETP, (char *)&game_ttyb);
(void)ioctl(0, TIOCSETC, (char *)&game_tchars);
(void)ioctl(0, TIOCSLTC, (char *)&game_ltchars);
(void)ioctl(0, TIOCLSET, (char *)&game_local_chars);
#endif
}
/*
* Save the normal keymap
*/
static void keymap_norm_prepare(void)
{
#ifdef USE_TPOSIX
/* Get the normal keymap */
tcgetattr(0, &norm_termios);
#endif
#ifdef USE_TERMIO
/* Get the normal keymap */
(void)ioctl(0, TCGETA, (char *)&norm_termio);
#endif
#ifdef USE_TCHARS
/* Get the normal keymap */
(void)ioctl(0, TIOCGETP, (char *)&norm_ttyb);
(void)ioctl(0, TIOCGETC, (char *)&norm_tchars);
(void)ioctl(0, TIOCGLTC, (char *)&norm_ltchars);
(void)ioctl(0, TIOCLGET, (char *)&norm_local_chars);
#endif
}
/*
* Save the keymaps (normal and game)
*/
static void keymap_game_prepare(void)
{
#ifdef USE_TPOSIX
/* Acquire the current mapping */
tcgetattr(0, &game_termios);
/* Force "Ctrl-C" to interupt */
game_termios.c_cc[VINTR] = (char)3;
/* Force "Ctrl-Z" to suspend */
game_termios.c_cc[VSUSP] = (char)26;
/* Hack -- Leave "VSTART/VSTOP" alone */
/* Disable the standard control characters */
game_termios.c_cc[VQUIT] = (char) - 1;
game_termios.c_cc[VERASE] = (char) - 1;
game_termios.c_cc[VKILL] = (char) - 1;
game_termios.c_cc[VEOF] = (char) - 1;
game_termios.c_cc[VEOL] = (char) - 1;
/* Normally, block until a character is read */
game_termios.c_cc[VMIN] = 1;
game_termios.c_cc[VTIME] = 0;
/* Hack -- Turn off "echo" and "canonical" mode */
game_termios.c_lflag &= ~(ECHO | ICANON);
#endif
#ifdef USE_TERMIO
/* Acquire the current mapping */
(void)ioctl(0, TCGETA, (char *)&game_termio);
/* Force "Ctrl-C" to interupt */
game_termio.c_cc[VINTR] = (char)3;
/* Force "Ctrl-Z" to suspend */
game_termio.c_cc[VSUSP] = (char)26;
/* Hack -- Leave "VSTART/VSTOP" alone */
/* Disable the standard control characters */
game_termio.c_cc[VQUIT] = (char) - 1;
game_termio.c_cc[VERASE] = (char) - 1;
game_termio.c_cc[VKILL] = (char) - 1;
game_termio.c_cc[VEOF] = (char) - 1;
game_termio.c_cc[VEOL] = (char) - 1;
#if 0
/* Disable the non-posix control characters */
game_termio.c_cc[VEOL2] = (char) - 1;
game_termio.c_cc[VSWTCH] = (char) - 1;
game_termio.c_cc[VDSUSP] = (char) - 1;
game_termio.c_cc[VREPRINT] = (char) - 1;
game_termio.c_cc[VDISCARD] = (char) - 1;
game_termio.c_cc[VWERASE] = (char) - 1;
game_termio.c_cc[VLNEXT] = (char) - 1;
game_termio.c_cc[VSTATUS] = (char) - 1;
#endif
/* Normally, block until a character is read */
game_termio.c_cc[VMIN] = 1;
game_termio.c_cc[VTIME] = 0;
/* Hack -- Turn off "echo" and "canonical" mode */
game_termio.c_lflag &= ~(ECHO | ICANON);
#endif
#ifdef USE_TCHARS
/* Get the default game characters */
(void)ioctl(0, TIOCGETP, (char *)&game_ttyb);
(void)ioctl(0, TIOCGETC, (char *)&game_tchars);
(void)ioctl(0, TIOCGLTC, (char *)&game_ltchars);
(void)ioctl(0, TIOCLGET, (char *)&game_local_chars);
/* Force interupt (^C) */
game_tchars.t_intrc = (char)3;
/* Force start/stop (^Q, ^S) */
game_tchars.t_startc = (char)17;
game_tchars.t_stopc = (char)19;
/* Cancel some things */
game_tchars.t_quitc = (char) - 1;
game_tchars.t_eofc = (char) - 1;
game_tchars.t_brkc = (char) - 1;
/* Force suspend (^Z) */
game_ltchars.t_suspc = (char)26;
/* Cancel some things */
game_ltchars.t_dsuspc = (char) - 1;
game_ltchars.t_rprntc = (char) - 1;
game_ltchars.t_flushc = (char) - 1;
game_ltchars.t_werasc = (char) - 1;
game_ltchars.t_lnextc = (char) - 1;
/* XXX XXX XXX XXX Verify this before use */
/* Hack -- Turn off "echo" and "canonical" mode */
/* game_termios.c_lflag &= ~(ECHO | ICANON); */
game_ttyb.flag &= ~(ECHO | ICANON);
#endif
}
/*
* Suspend/Resume
*/
static errr Term_xtra_cap_alive(int v)
{
/* Suspend */
if (!v)
{
if (!active) return (1);
/* Hack -- make sure the cursor is visible */
curs_set(1);
/* Move to bottom right */
do_move(0, rows - 1, 0, rows - 1);
/* Go to normal keymap mode */
keymap_norm();
/* No longer active */
active = FALSE;
}
/* Resume */
else
{
if (active) return (1);
/* Hack -- restore the cursor location */
do_move(curx, cury, curx, cury);
/* Hack -- restore the cursor visibility */
curs_set(curv);
/* Go to angband keymap mode */
keymap_game();
/* Now we are active */
active = TRUE;
}
/* Success */
return (0);
}
/*
* Process an event
*/
static errr Term_xtra_cap_event(int v)
{
int i, arg;
char buf[2];
/* Wait */
if (v)
{
/* Wait for one byte */
i = read(0, buf, 1);
/* Hack -- Handle "errors" */
if ((i <= 0) && (errno != EINTR)) exit_game_panic();
}
/* Do not wait */
else
{
/* Get the current flags for stdin */
if ((arg = fcntl(0, F_GETFL, 0)) < 1) return (1);
/* Tell stdin not to block */
if (fcntl(0, F_SETFL, arg | O_NDELAY) < 0) return (1);
/* Read one byte, if possible */
i = read(0, buf, 1);
/* Replace the flags for stdin */
if (fcntl(0, F_SETFL, arg)) return (1);
}
/* No keys ready */
if ((i != 1) || (!buf[0])) return (1);
/* Enqueue the keypress */
Term_keypress(buf[0]);
/* Success */
return (0);
}
/*
* Actually move the hardware cursor
*/
static errr Term_curs_cap(int x, int y)
{
/* Literally move the cursor */
do_move(curx, cury, x, y);
/* Save the cursor location */
curx = x;
cury = y;
/* Success */
return (0);
}
/*
* Erase a grid of space
*
* XXX XXX XXX Note that we will never be asked to clear the
* bottom line all the way to the bottom right edge, since we
* have set the "avoid the bottom right corner" flag.
*/
static errr Term_wipe_cap(int x, int y, int n)
{
int dx;
/* Place the cursor */
Term_curs_cap(x, y);
/* Wipe to end of line */
if (x + n >= 80)
{
do_ce();
}
/* Wipe region */
else
{
for (dx = 0; dx < n; ++dx)
{
putc(' ', stdout);
curx++;
}
}
/* Success */
return (0);
}
/*
* Place some text on the screen using an attribute
*/
static errr Term_text_cap(int x, int y, int n, byte a, cptr s)
{
int i;
/* Move the cursor */
Term_curs_cap(x, y);
/* Dump the text, advance the cursor */
for (i = 0; s[i]; i++)
{
/* Dump the char */
putc(s[i], stdout);
/* Advance cursor 'X', and wrap */
if (++curx >= cols)
{
/* Reset cursor 'X' */
curx = 0;
/* Hack -- Advance cursor 'Y', and wrap */
if (++cury == rows) cury = 0;
}
}
/* Success */
return (0);
}
/*
* Handle a "special request"
*/
static errr Term_xtra_cap(int n, int v)
{
/* Analyze the request */
switch (n)
{
/* Clear the screen */
case TERM_XTRA_CLEAR:
do_cl();
do_move(0, 0, 0, 0);
return (0);
/* Make a noise */
case TERM_XTRA_NOISE:
(void)write(1, "\007", 1);
return (0);
/* Change the cursor visibility */
case TERM_XTRA_SHAPE:
curv = v;
curs_set(v);
return (0);
/* Suspend/Resume */
case TERM_XTRA_ALIVE:
return (Term_xtra_cap_alive(v));
/* Process events */
case TERM_XTRA_EVENT:
return (Term_xtra_cap_event(v));
/* Flush events */
case TERM_XTRA_FLUSH:
while (!Term_xtra_cap_event(FALSE));
return (0);
/* Delay */
case TERM_XTRA_DELAY:
usleep(1000 * v);
return (0);
}
/* Not parsed */
return (1);
}
/*
* Init a "term" for this file
*/
static void Term_init_cap(term *t)
{
if (active) return;
/* Assume cursor at top left */
curx = 0;
cury = 0;
/* Assume visible cursor */
curv = 1;
/* Clear the screen */
do_cl();
/* Hack -- visible cursor */
curs_set(1);
/* Assume active */
active = TRUE;
}
/*
* Nuke a "term" for this file
*/
static void Term_nuke_cap(term *t)
{
if (!active) return;
/* Hack -- make sure the cursor is visible */
curs_set(1);
/* Move to bottom right */
do_move(0, rows - 1, 0, rows - 1);
/* Normal keymap */
keymap_norm();
/* No longer active */
active = FALSE;
}
/*
* Prepare this file for Angband usage
*/
errr init_cap(void)
{
term *t = &term_screen_body;
/*** Initialize ***/
/* Initialize the screen */
if (init_cap_aux()) return ( -1);
/* Hack -- Require large screen, or Quit with message */
if ((rows < 24) || (cols < 80)) quit("Screen too small!");
/*** Prepare to play ***/
/* Extract the normal keymap */
keymap_norm_prepare();
/* Extract the game keymap */
keymap_game_prepare();
/* Hack -- activate the game keymap */
keymap_game();
/* Hack -- Do NOT buffer stdout */
setbuf(stdout, NULL);
/*** Now prepare the term ***/
/* Initialize the term */
term_init(t, 80, 24, 256);
/* Avoid the bottom right corner */
t->icky_corner = TRUE;
/* Erase with "white space" */
t->attr_blank = TERM_WHITE;
t->char_blank = ' ';
/* Set some hooks */
t->init_hook = Term_init_cap;
t->nuke_hook = Term_nuke_cap;
/* Set some more hooks */
t->text_hook = Term_text_cap;
t->wipe_hook = Term_wipe_cap;
t->curs_hook = Term_curs_cap;
t->xtra_hook = Term_xtra_cap;
/* Save the term */
term_screen = t;
/* Activate it */
Term_activate(term_screen);
/* Success */
return (0);
}
#endif /* USE_CAP */
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