trek/getpar.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * 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
  34 #ifndef lint
  35 static char sccsid[] = "@(#)getpar.c    4.8 (Berkeley) 6/1/90";
  36 #endif /* not lint */
  37
  38 # include       <stdio.h>
  39 # include       "getpar.h"
  40
  41 /**
  42  **     get integer parameter
  43  **/
  44
  45 getintpar(s)
  46 char    *s;
  47 {
  48         register int    i;
  49         int             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 getfltpar(s)
  70 char    *s;
  71 {
  72         register 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 struct cvntab   Yntab[] =
  94 {
  95         "y",    "es",   (int (*)())1,   0,
  96         "n",    "o",    (int (*)())0,   0,
  97         0
  98 };
  99
 100 getynpar(s)
 101 char    *s;
 102 {
 103         struct cvntab           *r;
 104
 105         r = getcodpar(s, Yntab);
 106         return ((int) r->value);
 107 }
 108
 109
 110 /**
 111  **     get coded parameter
 112  **/
 113
 114 struct cvntab *getcodpar(s, tab)
 115 char            *s;
 116 struct cvntab   tab[];
 117 {
 118         char                            input[100];
 119         register struct cvntab          *r;
 120         int                             flag;
 121         register char                   *p, *q;
 122         int                             c;
 123         int                             f;
 124
 125         flag = 0;
 126         while (1)
 127         {
 128                 flag |= (f = testnl());
 129                 if (flag)
 130                         printf("%s: ", s);
 131                 if (f)
 132                         cgetc(0);               /* throw out the newline */
 133                 scanf("%*[ \t;]");
 134                 if ((c = scanf("%[^ \t;\n]", input)) < 0)
 135                         exit(1);
 136                 if (c == 0)
 137                         continue;
 138                 flag = 1;
 139
 140                 /* if command list, print four per line */
 141                 if (input[0] == '?' && input[1] == 0)
 142                 {
 143                         c = 4;
 144                         for (r = tab; r->abrev; r++)
 145                         {
 146                                 concat(r->abrev, r->full, 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 getstrpar(s, r, l, t)
 192 char    *s;
 193 char    *r;
 194 int     l;
 195 char    *t;
 196 {
 197         register int    i;
 198         char            format[20];
 199         register int    f;
 200
 201         if (t == 0)
 202                 t = " \t\n;";
 203         (void)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 testnl()
 225 {
 226         register char           c;
 227
 228         while ((c = cgetc(0)) != '\n')
 229                 if ((c >= '0' && c <= '9') || c == '.' || c == '!' ||
 230                                 (c >= 'A' && c <= 'Z') ||
 231                                 (c >= 'a' && c <= 'z') || c == '-')
 232                 {
 233                         ungetc(c, stdin);
 234                         return(0);
 235                 }
 236         ungetc(c, stdin);
 237         return (1);
 238 }
 239
 240
 241 /**
 242  **     scan for newline
 243  **/
 244
 245 skiptonl(c)
 246 char    c;
 247 {
 248         while (c != '\n')
 249                 if (!(c = cgetc(0)))
 250                         return;
 251         ungetc('\n', stdin);
 252         return;
 253 }
 254
 255
 256 /**
 257  **     test for valid terminator
 258  **/
 259
 260 testterm()
 261 {
 262         register char           c;
 263
 264         if (!(c = cgetc(0)))
 265                 return (1);
 266         if (c == '.')
 267                 return (0);
 268         if (c == '\n' || c == ';')
 269                 ungetc(c, stdin);
 270         return (1);
 271 }
 272
 273
 274 /*
 275 **  TEST FOR SPECIFIED DELIMETER
 276 **
 277 **      The standard input is scanned for the parameter.  If found,
 278 **      it is thrown away and non-zero is returned.  If not found,
 279 **      zero is returned.
 280 */
 281
 282 readdelim(d)
 283 char    d;
 284 {
 285         register char   c;
 286
 287         while (c = cgetc(0))
 288         {
 289                 if (c == d)
 290                         return (1);
 291                 if (c == ' ')
 292                         continue;
 293                 ungetc(c, stdin);
 294                 break;
 295         }
 296         return (0);
 297 }