1 /* $NetBSD: getinp.c,v 1.19 2012/06/19 05:35:32 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)getinp.c 8.1 (Berkeley) 5/31/93 32 */ 33 34 #include <stdio.h> 35 #include <string.h> 36 #include <ctype.h> 37 38 #include "monop.h" 39 40 #define LINE 70 41 42 static char buf[257]; 43 44 static int comp(const char *); 45 46 int 47 getinp(const char *prompt, const char *const lst []) 48 { 49 int i, n_match, match = 0; 50 char *sp; 51 52 for (;;) { 53 printf("%s", prompt); 54 fgets(buf, sizeof(buf), stdin); 55 if (feof(stdin)) { 56 return 0; 57 } 58 if (buf[0] == '?' && buf[1] == '\n') { 59 printf("Valid inputs are: "); 60 for (i = 0, match = 18; lst[i]; i++) { 61 if ((match+=(n_match=strlen(lst[i]))) > LINE) { 62 printf("\n\t"); 63 match = n_match + 8; 64 } 65 if (*lst[i] == '\0') { 66 match += 8; 67 printf("<RETURN>"); 68 } 69 else 70 printf("%s", lst[i]); 71 if (lst[i+1]) 72 printf(", "); 73 else 74 putchar('\n'); 75 match += 2; 76 } 77 continue; 78 } 79 if ((sp = strchr(buf, '\n')) != NULL) 80 *sp = '\0'; 81 for (sp = buf; *sp; sp++) 82 *sp = tolower((unsigned char)*sp); 83 for (i = n_match = 0; lst[i]; i++) 84 if (comp(lst[i])) { 85 n_match++; 86 match = i; 87 } 88 if (n_match == 1) 89 return match; 90 else if (buf[0] != '\0') 91 printf("Illegal response: \"%s\". " 92 "Use '?' to get list of valid answers\n", buf); 93 } 94 } 95 96 static int 97 comp(const char *s1) 98 { 99 const char *sp, *tsp; 100 char c; 101 102 if (buf[0] != '\0') 103 for (sp = buf, tsp = s1; *sp; ) { 104 c = tolower((unsigned char)*tsp); 105 tsp++; 106 if (c != *sp++) 107 return 0; 108 } 109 else if (*s1 != '\0') 110 return 0; 111 return 1; 112 } 113