games/trek/getpar.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. 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  * @(#)getpar.c 8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/getpar.c,v 1.5 1999/11/30 03:49:48 billf Exp $
  35  * $DragonFly: src/games/trek/getpar.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  36  */
  37
  38 # include       "getpar.h"
  39 # include       "trek.h"
  40
  41 static bool     testterm(void);
  42
  43 /**
  44  **     get integer parameter
  45  **/
  46
  47 int
  48 getintpar(const char *s)
  49 {
  50         int     i;
  51         int             n;
  52
  53         while (1)
  54         {
  55                 if (testnl() && s)
  56                         printf("%s: ", s);
  57                 i = scanf("%d", &n);
  58                 if (i < 0)
  59                         exit(1);
  60                 if (i > 0 && testterm())
  61                         return (n);
  62                 printf("invalid input; please enter an integer\n");
  63                 skiptonl(0);
  64         }
  65 }
  66
  67 /**
  68  **     get floating parameter
  69  **/
  70
  71 double
  72 getfltpar(const char *s)
  73 {
  74         int             i;
  75         double                  d;
  76
  77         while (1)
  78         {
  79                 if (testnl() && s)
  80                         printf("%s: ", s);
  81                 i = scanf("%lf", &d);
  82                 if (i < 0)
  83                         exit(1);
  84                 if (i > 0 && testterm())
  85                         return (d);
  86                 printf("invalid input; please enter a double\n");
  87                 skiptonl(0);
  88         }
  89 }
  90
  91 /**
  92  **     get yes/no parameter
  93  **/
  94
  95 struct cvntab   Yntab[] =
  96 {
  97         { "y",  "es",   (void (*)(int))1,       0 },
  98         { "n",  "o",    (void (*)(int))0,       0 },
  99         { NULL, NULL,   NULL,                   0 }
 100 };
 101
 102 long
 103 getynpar(const char *s)
 104 {
 105         struct cvntab           *r;
 106
 107         r = getcodpar(s, Yntab);
 108         return ((long) r->value);
 109 }
 110
 111
 112 /**
 113  **     get coded parameter
 114  **/
 115
 116 struct cvntab *
 117 getcodpar(const char *s, struct cvntab tab[])
 118 {
 119         char                            input[100];
 120         struct cvntab           *r;
 121         int                             flag;
 122         char                    *p;
 123         const char              *q;
 124         int                             c;
 125         int                             f;
 126
 127         flag = 0;
 128         while (1)
 129         {
 130                 flag |= (f = testnl());
 131                 if (flag)
 132                         printf("%s: ", s);
 133                 if (f)
 134                         cgetc(0);               /* throw out the newline */
 135                 scanf("%*[ \t;]");
 136                 if ((c = scanf("%[^ \t;\n]", input)) < 0)
 137                         exit(1);
 138                 if (c == 0)
 139                         continue;
 140                 flag = 1;
 141
 142                 /* if command list, print four per line */
 143                 if (input[0] == '?' && input[1] == 0)
 144                 {
 145                         c = 4;
 146                         for (r = tab; r->abrev; r++)
 147                         {
 148                                 strcpy(input, r->abrev);
 149                                 strcat(input, r->full);
 150                                 printf("%14.14s", input);
 151                                 if (--c > 0)
 152                                         continue;
 153                                 c = 4;
 154                                 printf("\n");
 155                         }
 156                         if (c != 4)
 157                                 printf("\n");
 158                         continue;
 159                 }
 160
 161                 /* search for in table */
 162                 for (r = tab; r->abrev; r++)
 163                 {
 164                         p = input;
 165                         for (q = r->abrev; *q; q++)
 166                                 if (*p++ != *q)
 167                                         break;
 168                         if (!*q)
 169                         {
 170                                 for (q = r->full; *p && *q; q++, p++)
 171                                         if (*p != *q)
 172                                                 break;
 173                                 if (!*p || !*q)
 174                                         break;
 175                         }
 176                 }
 177
 178                 /* check for not found */
 179                 if (!r->abrev)
 180                 {
 181                         printf("invalid input; ? for valid inputs\n");
 182                         skiptonl(0);
 183                 }
 184                 else
 185                         return (r);
 186         }
 187 }
 188
 189
 190 /**
 191  **     get string parameter
 192  **/
 193
 194 void
 195 getstrpar(const char *s, char *r, int l, const char *t)
 196 {
 197         int     i;
 198         char            format[20];
 199         int     f;
 200
 201         if (t == 0)
 202                 t = " \t\n;";
 203         sprintf(format, "%%%d[^%s]", l, t);
 204         while (1)
 205         {
 206                 if ((f = testnl()) && s)
 207                         printf("%s: ", s);
 208                 if (f)
 209                         cgetc(0);
 210                 scanf("%*[\t ;]");
 211                 i = scanf(format, r);
 212                 if (i < 0)
 213                         exit(1);
 214                 if (i != 0)
 215                         return;
 216         }
 217 }
 218
 219
 220 /**
 221  **     test if newline is next valid character
 222  **/
 223
 224 bool
 225 testnl(void)
 226 {
 227         char            c;
 228
 229         while ((c = cgetc(0)) != '\n')
 230                 if ((c >= '0' && c <= '9') || c == '.' || c == '!' ||
 231                                 (c >= 'A' && c <= 'Z') ||
 232                                 (c >= 'a' && c <= 'z') || c == '-')
 233                 {
 234                         ungetc(c, stdin);
 235                         return(0);
 236                 }
 237         ungetc(c, stdin);
 238         return (1);
 239 }
 240
 241
 242 /**
 243  **     scan for newline
 244  **/
 245
 246 void
 247 skiptonl(char c)
 248 {
 249         while (c != '\n')
 250                 if (!(c = cgetc(0)))
 251                         return;
 252         ungetc('\n', stdin);
 253         return;
 254 }
 255
 256
 257 /**
 258  **     test for valid terminator
 259  **/
 260
 261 static bool
 262 testterm(void)
 263 {
 264         char            c;
 265
 266         if (!(c = cgetc(0)))
 267                 return (1);
 268         if (c == '.')
 269                 return (0);
 270         if (c == '\n' || c == ';')
 271                 ungetc(c, stdin);
 272         return (1);
 273 }
 274
 275
 276 /*
 277 **  TEST FOR SPECIFIED DELIMETER
 278 **
 279 **      The standard input is scanned for the parameter.  If found,
 280 **      it is thrown away and non-zero is returned.  If not found,
 281 **      zero is returned.
 282 */
 283
 284 bool
 285 readdelim(char d)
 286 {
 287         char    c;
 288
 289         while ((c = cgetc(0)))
 290         {
 291                 if (c == d)
 292                         return (1);
 293                 if (c == ' ')
 294                         continue;
 295                 ungetc(c, stdin);
 296                 break;
 297         }
 298         return (0);
 299 }