1 /* $NetBSD: stoc.c,v 1.21 2022/05/29 00:12:11 rillig Exp $ */
2
3 /*
4 * Copyright (c) 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 /* @(#)stoc.c 8.1 (Berkeley) 7/24/94 */
37 __RCSID("$NetBSD: stoc.c,v 1.21 2022/05/29 00:12:11 rillig Exp $");
38
39 #include <ctype.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include "gomoku.h"
43
44 const char letters[] = "<ABCDEFGHJKLMNOPQRST>";
45
46
47 /*
48 * Turn the spot number form of a move into the character form.
49 */
50 const char *
stoc(spot_index s)51 stoc(spot_index s)
52 {
53 static char buf[32];
54
55 if (s == RESIGN)
56 return "resign";
57 if (s == SAVE)
58 return "save";
59 snprintf(buf, sizeof(buf), "%c%d",
60 letters[s % (BSZ + 1)], s / (BSZ + 1));
61 return buf;
62 }
63
64 /*
65 * Turn the character form of a move into the spot number form.
66 */
67 spot_index
ctos(const char * mp)68 ctos(const char *mp)
69 {
70
71 if (strcmp(mp, "resign") == 0 || strcmp(mp, "quit") == 0)
72 return RESIGN;
73 if (strcmp(mp, "save") == 0)
74 return SAVE;
75
76 int letter = toupper((unsigned char)mp[0]);
77 int x = 1;
78 while (x <= BSZ && letters[x] != letter)
79 x++;
80 if (x > BSZ)
81 return ILLEGAL;
82
83 int y = atoi(&mp[1]);
84 if (y < 1 || y > 19)
85 return ILLEGAL;
86
87 return PT(x, y);
88 }
89