1 /* $OpenBSD: stoc.c,v 1.11 2016/01/08 21:38:33 mestre Exp $ */ 2 /* 3 * Copyright (c) 1994 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Ralph Campbell. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <ctype.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 #include "gomoku.h" 39 40 char *letters = "<ABCDEFGHJKLMNOPQRST>"; 41 42 struct mvstr { 43 int m_code; 44 char *m_text; 45 }; 46 static struct mvstr mv[] = { 47 {RESIGN, "resign" }, 48 {RESIGN, "quit" }, 49 {SAVE, "save" }, 50 {-1, 0} 51 }; 52 53 /* 54 * Turn the spot number form of a move into the character form. 55 */ 56 char * 57 stoc(int s) 58 { 59 static char buf[32]; 60 int i; 61 62 for (i = 0; mv[i].m_code >= 0; i++) 63 if (s == mv[i].m_code) 64 return(mv[i].m_text); 65 snprintf(buf, sizeof buf, "%c%d", letters[s % BSZ1], s / BSZ1); 66 return(buf); 67 } 68 69 /* 70 * Turn the character form of a move into the spot number form. 71 */ 72 int 73 ctos(char *mp) 74 { 75 int i; 76 77 for (i = 0; mv[i].m_code >= 0; i++) 78 if (strcmp(mp, mv[i].m_text) == 0) 79 return(mv[i].m_code); 80 if (!isalpha((unsigned char)mp[0])) 81 return(ILLEGAL); 82 i = atoi(&mp[1]); 83 if (i < 1 || i > 19) 84 return(ILLEGAL); 85 return(PT(lton(mp[0]), i)); 86 } 87 88 /* 89 * Turn a letter into a number. 90 */ 91 int 92 lton(int c) 93 { 94 int i; 95 96 if (islower(c)) 97 c = toupper(c); 98 for (i = 1; i <= BSZ && letters[i] != c; i++) 99 ; 100 return(i); 101 } 102