games/number/number.c

   1 /*
   2  * Copyright (c) 1988, 1993, 1994
   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
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1988, 1993, 1994\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)number.c    8.3 (Berkeley) 5/4/95";
  43 #endif
  44 static const char rcsid[] =
  45  "$FreeBSD: src/games/number/number.c,v 1.12 1999/12/12 03:22:35 billf Exp $";
  46 #endif /* not lint */
  47
  48 #include <sys/types.h>
  49
  50 #include <ctype.h>
  51 #include <err.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <unistd.h>
  56
  57 #define MAXNUM          65              /* Biggest number we handle. */
  58
  59 static const char       *name1[] = {
  60         "",             "one",          "two",          "three",
  61         "four",         "five",         "six",          "seven",
  62         "eight",        "nine",         "ten",          "eleven",
  63         "twelve",       "thirteen",     "fourteen",     "fifteen",
  64         "sixteen",      "seventeen",    "eighteen",     "nineteen",
  65 },
  66                 *name2[] = {
  67         "",             "ten",          "twenty",       "thirty",
  68         "forty",        "fifty",        "sixty",        "seventy",
  69         "eighty",       "ninety",
  70 },
  71                 *name3[] = {
  72         "hundred",      "thousand",     "million",      "billion",
  73         "trillion",     "quadrillion",  "quintillion",  "sextillion",
  74         "septillion",   "octillion",    "nonillion",    "decillion",
  75         "undecillion",  "duodecillion", "tredecillion", "quattuordecillion",
  76         "quindecillion",                "sexdecillion",
  77         "septendecillion",              "octodecillion",
  78         "novemdecillion",               "vigintillion",
  79 };
  80
  81 void    convert __P((char *));
  82 int     number __P((char *, int));
  83 void    pfract __P((int));
  84 void    toobig __P((void));
  85 int     unit __P((int, char *));
  86 void    usage __P((void));
  87
  88 int lflag;
  89
  90 int
  91 main(argc, argv)
  92         int argc;
  93         char *argv[];
  94 {
  95         int ch, first;
  96         char line[256];
  97
  98         lflag = 0;
  99         while ((ch = getopt(argc, argv, "l")) != -1)
 100                 switch (ch) {
 101                 case 'l':
 102                         lflag = 1;
 103                         break;
 104                 case '?':
 105                 default:
 106                         usage();
 107                 }
 108         argc -= optind;
 109         argv += optind;
 110
 111         if (*argv == NULL)
 112                 for (first = 1;
 113                     fgets(line, sizeof(line), stdin) != NULL; first = 0) {
 114                         if (strchr(line, '\n') == NULL)
 115                                 errx(1, "line too long.");
 116                         if (!first)
 117                                 (void)printf("...\n");
 118                         convert(line);
 119                 }
 120         else
 121                 for (first = 1; *argv != NULL; first = 0, ++argv) {
 122                         if (!first)
 123                                 (void)printf("...\n");
 124                         convert(*argv);
 125                 }
 126         exit(0);
 127 }
 128
 129 void
 130 convert(line)
 131         char *line;
 132 {
 133         int flen, len, rval;
 134         char *p, *fraction;
 135
 136         flen = NULL;
 137         fraction = NULL;
 138         for (p = line; *p != '\0' && *p != '\n'; ++p) {
 139                 if (isblank(*p)) {
 140                         if (p == line) {
 141                                 ++line;
 142                                 continue;
 143                         }
 144                         goto badnum;
 145                 }
 146                 if (isdigit(*p))
 147                         continue;
 148                 switch (*p) {
 149                 case '.':
 150                         if (fraction != NULL)
 151                                 goto badnum;
 152                         fraction = p + 1;
 153                         *p = '\0';
 154                         break;
 155                 case '-':
 156                         if (p == line)
 157                                 break;
 158                         /* FALLTHROUGH */
 159                 default:
 160 badnum:                 errx(1, "illegal number: %s", line);
 161                         break;
 162                 }
 163         }
 164         *p = '\0';
 165
 166         if ((len = strlen(line)) > MAXNUM ||
 167             (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM)))
 168                 errx(1, "number too large, max %d digits.", MAXNUM);
 169
 170         if (*line == '-') {
 171                 (void)printf("minus%s", lflag ? " " : "\n");
 172                 ++line;
 173                 --len;
 174         }
 175
 176         rval = len > 0 ? unit(len, line) : 0;
 177         if (fraction != NULL && flen != 0)
 178                 for (p = fraction; *p != '\0'; ++p)
 179                         if (*p != '0') {
 180                                 if (rval)
 181                                         (void)printf("%sand%s",
 182                                             lflag ? " " : "",
 183                                             lflag ? " " : "\n");
 184                                 if (unit(flen, fraction)) {
 185                                         if (lflag)
 186                                                 (void)printf(" ");
 187                                         pfract(flen);
 188                                         rval = 1;
 189                                 }
 190                                 break;
 191                         }
 192         if (!rval)
 193                 (void)printf("zero%s", lflag ? "" : ".\n");
 194         if (lflag)
 195                 (void)printf("\n");
 196 }
 197
 198 int
 199 unit(len, p)
 200         int len;
 201         char *p;
 202 {
 203         int off, rval;
 204
 205         rval = 0;
 206         if (len > 3) {
 207                 if (len % 3) {
 208                         off = len % 3;
 209                         len -= off;
 210                         if (number(p, off)) {
 211                                 rval = 1;
 212                                 (void)printf(" %s%s",
 213                                     name3[len / 3], lflag ? " " : ".\n");
 214                         }
 215                         p += off;
 216                 }
 217                 for (; len > 3; p += 3) {
 218                         len -= 3;
 219                         if (number(p, 3)) {
 220                                 rval = 1;
 221                                 (void)printf(" %s%s",
 222                                     name3[len / 3], lflag ? " " : ".\n");
 223                         }
 224                 }
 225         }
 226         if (number(p, len)) {
 227                 if (!lflag)
 228                         (void)printf(".\n");
 229                 rval = 1;
 230         }
 231         return (rval);
 232 }
 233
 234 int
 235 number(p, len)
 236         char *p;
 237         int len;
 238 {
 239         int val, rval;
 240
 241         rval = 0;
 242         switch (len) {
 243         case 3:
 244                 if (*p != '0') {
 245                         rval = 1;
 246                         (void)printf("%s hundred", name1[*p - '0']);
 247                 }
 248                 ++p;
 249                 /* FALLTHROUGH */
 250         case 2:
 251                 val = (p[1] - '0') + (p[0] - '0') * 10;
 252                 if (val) {
 253                         if (rval)
 254                                 (void)printf(" ");
 255                         if (val < 20)
 256                                 (void)printf("%s", name1[val]);
 257                         else {
 258                                 (void)printf("%s", name2[val / 10]);
 259                                 if (val % 10)
 260                                         (void)printf("-%s", name1[val % 10]);
 261                         }
 262                         rval = 1;
 263                 }
 264                 break;
 265         case 1:
 266                 if (*p != '0') {
 267                         rval = 1;
 268                         (void)printf("%s", name1[*p - '0']);
 269                 }
 270         }
 271         return (rval);
 272 }
 273
 274 void
 275 pfract(len)
 276         int len;
 277 {
 278         static char *pref[] = { "", "ten-", "hundred-" };
 279
 280         switch(len) {
 281         case 1:
 282                 (void)printf("tenths.\n");
 283                 break;
 284         case 2:
 285                 (void)printf("hundredths.\n");
 286                 break;
 287         default:
 288                 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
 289                 break;
 290         }
 291 }
 292
 293 void
 294 usage()
 295 {
 296         (void)fprintf(stderr, "usage: number [# ...]\n");
 297         exit(1);
 298 }