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      1 /*	$NetBSD: terminal.c,v 1.8 2021/05/02 12:50:45 rillig Exp $	*/
      2 /*
      3  * Copyright (c) 1983-2003, Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions are
      8  * met:
      9  *
     10  * + Redistributions of source code must retain the above copyright
     11  *   notice, this list of conditions and the following disclaimer.
     12  * + Redistributions in binary form must reproduce the above copyright
     13  *   notice, this list of conditions and the following disclaimer in the
     14  *   documentation and/or other materials provided with the distribution.
     15  * + Neither the name of the University of California, San Francisco nor
     16  *   the names of its contributors may be used to endorse or promote
     17  *   products derived from this software without specific prior written
     18  *   permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
     21  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
     23  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 #ifndef lint
     35 __RCSID("$NetBSD: terminal.c,v 1.8 2021/05/02 12:50:45 rillig Exp $");
     36 #endif /* not lint */
     37 
     38 #include <stdarg.h>
     39 #include "hunt.h"
     40 #define TERM_WIDTH	80	/* Assume terminals are 80-char wide */
     41 
     42 /*
     43  * cgoto:
     44  *	Move the cursor to the given position on the given player's
     45  *	terminal.
     46  */
     47 void
     48 cgoto(PLAYER *pp, int y, int x)
     49 {
     50 	if (x == pp->p_curx && y == pp->p_cury)
     51 		return;
     52 	sendcom(pp, MOVE, y, x);
     53 	pp->p_cury = y;
     54 	pp->p_curx = x;
     55 }
     56 
     57 /*
     58  * outch:
     59  *	Put out a single character.
     60  */
     61 void
     62 outch(PLAYER *pp, int ch)
     63 {
     64 	if (++pp->p_curx >= TERM_WIDTH) {
     65 		pp->p_curx = 0;
     66 		pp->p_cury++;
     67 	}
     68 	(void) putc(ch, pp->p_output);
     69 }
     70 
     71 /*
     72  * outstr:
     73  *	Put out a string of the given length.
     74  */
     75 void
     76 outstr(PLAYER *pp, const char *str, int len)
     77 {
     78 	pp->p_curx += len;
     79 	pp->p_cury += (pp->p_curx / TERM_WIDTH);
     80 	pp->p_curx %= TERM_WIDTH;
     81 	while (len--)
     82 		(void) putc(*str++, pp->p_output);
     83 }
     84 
     85 /*
     86  * clrscr:
     87  *	Clear the screen, and reset the current position on the screen.
     88  */
     89 void
     90 clrscr(PLAYER *pp)
     91 {
     92 	sendcom(pp, CLEAR);
     93 	pp->p_cury = 0;
     94 	pp->p_curx = 0;
     95 }
     96 
     97 /*
     98  * ce:
     99  *	Clear to the end of the line
    100  */
    101 void
    102 ce(PLAYER *pp)
    103 {
    104 	sendcom(pp, CLRTOEOL);
    105 }
    106 
    107 #if 0		/* XXX lukem */
    108 /*
    109  * ref;
    110  *	Refresh the screen
    111  */
    112 void
    113 ref(PLAYER *pp)
    114 {
    115 	sendcom(pp, REFRESH);
    116 }
    117 #endif
    118 
    119 /*
    120  * sendcom:
    121  *	Send a command to the given user
    122  */
    123 void
    124 sendcom(PLAYER *pp, int command, ...)
    125 {
    126 	va_list	ap;
    127 	int arg1, arg2;
    128 
    129 	va_start(ap, command);
    130 	(void) putc(command, pp->p_output);
    131 	switch (command & 0377) {
    132 	case MOVE:
    133 		arg1 = va_arg(ap, int);
    134 		arg2 = va_arg(ap, int);
    135 		(void) putc(arg1, pp->p_output);
    136 		(void) putc(arg2, pp->p_output);
    137 		break;
    138 	case ADDCH:
    139 	case READY:
    140 		arg1 = va_arg(ap, int);
    141 		(void) putc(arg1, pp->p_output);
    142 		break;
    143 	}
    144 
    145 	va_end(ap);		/* No return needed for void functions. */
    146 }
    147