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stoc.c revision 1.11 
      1 /*	$NetBSD: stoc.c,v 1.11 2009/06/04 05:51:12 dholland 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 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)stoc.c	8.1 (Berkeley) 7/24/94";
     39 #else
     40 __RCSID("$NetBSD: stoc.c,v 1.11 2009/06/04 05:51:12 dholland Exp $");
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <ctype.h>
     45 #include <stdlib.h>
     46 #include <string.h>
     47 #include "gomoku.h"
     48 
     49 const char	*letters	= "<ABCDEFGHJKLMNOPQRST>";
     50 
     51 struct mvstr {
     52 	int	m_code;
     53 	const char	*m_text;
     54 };
     55 static	const struct	mvstr	mv[] = {
     56 	{ RESIGN,	"resign" },
     57 	{ RESIGN,	"quit" },
     58 	{ SAVE,		"save" },
     59 	{ -1,		0 }
     60 };
     61 
     62 /*
     63  * Turn the spot number form of a move into the character form.
     64  */
     65 const char *
     66 stoc(int s)
     67 {
     68 	static char buf[32];
     69 	int i;
     70 
     71 	for (i = 0; mv[i].m_code >= 0; i++)
     72 		if (s == mv[i].m_code)
     73 			return(mv[i].m_text);
     74 	snprintf(buf, sizeof(buf), "%c%d", letters[s % BSZ1], s / BSZ1);
     75 	return(buf);
     76 }
     77 
     78 /*
     79  * Turn the character form of a move into the spot number form.
     80  */
     81 int
     82 ctos(const char *mp)
     83 {
     84 	int i;
     85 
     86 	for (i = 0; mv[i].m_code >= 0; i++)
     87 		if (strcmp(mp, mv[i].m_text) == 0)
     88 			return(mv[i].m_code);
     89 	if (!isalpha((unsigned char)mp[0]))
     90 		return(ILLEGAL);
     91 	i = atoi(&mp[1]);
     92 	if (i < 1 || i > 19)
     93 		return(ILLEGAL);
     94 	return(PT(lton((unsigned char)mp[0]), i));
     95 }
     96 
     97 /*
     98  * Turn a letter into a number.
     99  */
    100 int
    101 lton(int c)
    102 {
    103 	int i;
    104 
    105 	if (islower(c))
    106 		c = toupper(c);
    107 	for (i = 1; i <= BSZ && letters[i] != c; i++)
    108 		;
    109 	return(i);
    110 }
    111