1 /* $OpenBSD: getpar.c,v 1.15 2016/01/07 14:37:51 mestre Exp $ */ 2 /* $NetBSD: getpar.c,v 1.4 1995/04/24 12:25:57 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 37 #include "getpar.h" 38 #include "trek.h" 39 40 static int testterm(void); 41 42 /** 43 ** get integer parameter 44 **/ 45 46 int 47 getintpar(const char *s) 48 { 49 int i, n; 50 51 while (1) 52 { 53 if (testnl() && s) 54 printf("%s: ", s); 55 i = scanf("%d", &n); 56 if (i < 0) 57 exit(1); 58 if (i > 0 && testterm()) 59 return (n); 60 printf("invalid input; please enter an integer\n"); 61 skiptonl(0); 62 } 63 } 64 65 /** 66 ** get floating parameter 67 **/ 68 69 double 70 getfltpar(const char *s) 71 { 72 int i; 73 double d; 74 75 while (1) 76 { 77 if (testnl() && s) 78 printf("%s: ", s); 79 i = scanf("%lf", &d); 80 if (i < 0) 81 exit(1); 82 if (i > 0 && testterm()) 83 return (d); 84 printf("invalid input; please enter a double\n"); 85 skiptonl(0); 86 } 87 } 88 89 /** 90 ** get yes/no parameter 91 **/ 92 93 const struct cvntab Yntab[] = 94 { 95 { "y", "es", (cmdfun)1, 1 }, 96 { "n", "o", (cmdfun)0, 0 }, 97 { NULL, NULL, NULL, 0 } 98 }; 99 100 int 101 getynpar(const char *s) 102 { 103 const struct cvntab *r; 104 105 r = getcodpar(s, Yntab); 106 return (r->value2); 107 } 108 109 110 /** 111 ** get coded parameter 112 **/ 113 114 const struct cvntab * 115 getcodpar(const char *s, const struct cvntab tab[]) 116 { 117 char input[100]; 118 const struct cvntab *r; 119 int flag; 120 const char *p, *q; 121 int c; 122 int f; 123 124 flag = 0; 125 while (1) 126 { 127 flag |= (f = testnl()); 128 if (flag) 129 printf("%s: ", s); 130 if (f) 131 getchar(); /* throw out the newline */ 132 scanf("%*[ \t;]"); 133 if ((c = scanf("%99[^ \t;\n]", input)) < 0) 134 exit(1); 135 if (c == 0) 136 continue; 137 flag = 1; 138 139 /* if command list, print four per line */ 140 if (input[0] == '?' && input[1] == 0) 141 { 142 c = 4; 143 for (r = tab; r->abrev; r++) 144 { 145 strlcpy(input, r->abrev, sizeof input); 146 strlcat(input, r->full, sizeof input); 147 printf("%14.14s", input); 148 if (--c > 0) 149 continue; 150 c = 4; 151 printf("\n"); 152 } 153 if (c != 4) 154 printf("\n"); 155 continue; 156 } 157 158 /* search for in table */ 159 for (r = tab; r->abrev; r++) 160 { 161 p = input; 162 for (q = r->abrev; *q; q++) 163 if (*p++ != *q) 164 break; 165 if (!*q) 166 { 167 for (q = r->full; *p && *q; q++, p++) 168 if (*p != *q) 169 break; 170 if (!*p || !*q) 171 break; 172 } 173 } 174 175 /* check for not found */ 176 if (!r->abrev) 177 { 178 printf("invalid input; ? for valid inputs\n"); 179 skiptonl(0); 180 } 181 else 182 return (r); 183 } 184 } 185 186 187 /** 188 ** get string parameter 189 **/ 190 191 void 192 getstrpar(const char *s, char *r, int l, const char *t) 193 { 194 int i, f; 195 char format[20]; 196 197 if (t == 0) 198 t = " \t\n;"; 199 (void)snprintf(format, sizeof format, "%%%d[^%s]", l, t); 200 while (1) 201 { 202 if ((f = testnl()) && s) 203 printf("%s: ", s); 204 if (f) 205 getchar(); 206 scanf("%*[\t ;]"); 207 i = scanf(format, r); 208 if (i < 0) 209 exit(1); 210 if (i != 0) 211 return; 212 } 213 } 214 215 216 /** 217 ** test if newline is next valid character 218 **/ 219 220 int 221 testnl(void) 222 { 223 int c; 224 225 while ((c = getchar()) != '\n') 226 if ((c >= '0' && c <= '9') || c == '.' || c == '!' || 227 (c >= 'A' && c <= 'Z') || 228 (c >= 'a' && c <= 'z') || c == '-' || c == EOF) 229 { 230 ungetc(c, stdin); 231 return(0); 232 } 233 ungetc(c, stdin); 234 return (1); 235 } 236 237 238 /** 239 ** scan for newline 240 **/ 241 242 void 243 skiptonl(int c) 244 { 245 while (c != '\n') 246 if (!(c = getchar())) 247 return; 248 ungetc('\n', stdin); 249 return; 250 } 251 252 253 /** 254 ** test for valid terminator 255 **/ 256 257 static int 258 testterm(void) 259 { 260 int c; 261 262 if (!(c = getchar())) 263 return (1); 264 if (c == '.') 265 return (0); 266 if (c == '\n' || c == ';') 267 ungetc(c, stdin); 268 return (1); 269 } 270 271 272 /* 273 ** TEST FOR SPECIFIED DELIMETER 274 ** 275 ** The standard input is scanned for the parameter. If found, 276 ** it is thrown away and non-zero is returned. If not found, 277 ** zero is returned. 278 */ 279 280 int 281 readdelim(int d) 282 { 283 int c; 284 285 while ((c = getchar())) 286 { 287 if (c == d) 288 return (1); 289 if (c == ' ') 290 continue; 291 ungetc(c, stdin); 292 break; 293 } 294 return (0); 295 } 296