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
cgoto(PLAYER * pp,int y,int x)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
outch(PLAYER * pp,int ch)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
outstr(PLAYER * pp,const char * str,int len)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
clrscr(PLAYER * pp)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
ce(PLAYER * pp)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
sendcom(PLAYER * pp,int command,...)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