number/number.c

   1 /*      $NetBSD: number.c,v 1.3 1995/03/23 08:35:30 cgd Exp $   */
   2
   3 /*
   4  * Copyright (c) 1988, 1993, 1994
   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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #ifndef lint
  37 static char copyright[] =
  38 "@(#) Copyright (c) 1988, 1993, 1994\n\
  39         The Regents of the University of California.  All rights reserved.\n";
  40 #endif /* not lint */
  41
  42 #ifndef lint
  43 #if 0
  44 static char sccsid[] = "@(#)number.c    8.2 (Berkeley) 3/31/94";
  45 #else
  46 static char rcsid[] = "$NetBSD: number.c,v 1.3 1995/03/23 08:35:30 cgd Exp $";
  47 #endif
  48 #endif /* not lint */
  49
  50 #include <sys/types.h>
  51
  52 #include <ctype.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <err.h>
  57
  58 #define MAXNUM          65              /* Biggest number we handle. */
  59
  60 static char     *name1[] = {
  61         "",             "one",          "two",          "three",
  62         "four",         "five",         "six",          "seven",
  63         "eight",        "nine",         "ten",          "eleven",
  64         "twelve",       "thirteen",     "fourteen",     "fifteen",
  65         "sixteen",      "seventeen",    "eighteen",     "nineteen",
  66 },
  67                 *name2[] = {
  68         "",             "ten",          "twenty",       "thirty",
  69         "forty",        "fifty",        "sixty",        "seventy",
  70         "eighty",       "ninety",
  71 },
  72                 *name3[] = {
  73         "hundred",      "thousand",     "million",      "billion",
  74         "trillion",     "quadrillion",  "quintillion",  "sextillion",
  75         "septillion",   "octillion",    "nonillion",    "decillion",
  76         "undecillion",  "duodecillion", "tredecillion", "quattuordecillion",
  77         "quindecillion",                "sexdecillion",
  78         "septendecillion",              "octodecillion",
  79         "novemdecillion",               "vigintillion",
  80 };
  81
  82 void    convert __P((char *));
  83 int     number __P((char *, int));
  84 void    pfract __P((int));
  85 void    toobig __P((void));
  86 int     unit __P((int, char *));
  87 void    usage __P((void));
  88
  89 int lflag;
  90
  91 int
  92 main(argc, argv)
  93         int argc;
  94         char *argv[];
  95 {
  96         int ch, first;
  97         char line[256];
  98
  99         lflag = 0;
 100         while ((ch = getopt(argc, argv, "l")) != EOF)
 101                 switch (ch) {
 102                 case 'l':
 103                         lflag = 1;
 104                         break;
 105                 case '?':
 106                 default:
 107                         usage();
 108                 }
 109         argc -= optind;
 110         argv += optind;
 111
 112         if (*argv == NULL)
 113                 for (first = 1;
 114                     fgets(line, sizeof(line), stdin) != NULL; first = 0) {
 115                         if (strchr(line, '\n') == NULL)
 116                                 errx(1, "line too long.");
 117                         if (!first)
 118                                 (void)printf("...\n");
 119                         convert(line);
 120                 }
 121         else
 122                 for (first = 1; *argv != NULL; first = 0, ++argv) {
 123                         if (!first)
 124                                 (void)printf("...\n");
 125                         convert(*argv);
 126                 }
 127         exit(0);
 128 }
 129
 130 void
 131 convert(line)
 132         char *line;
 133 {
 134         register flen, len, rval;
 135         register char *p, *fraction;
 136
 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         }
 174
 175         rval = len > 0 ? unit(len, line) : 0;
 176         if (fraction != NULL && flen != 0)
 177                 for (p = fraction; *p != '\0'; ++p)
 178                         if (*p != '0') {
 179                                 if (rval)
 180                                         (void)printf("%sand%s",
 181                                             lflag ? " " : "",
 182                                             lflag ? " " : "\n");
 183                                 if (unit(flen, fraction)) {
 184                                         if (lflag)
 185                                                 (void)printf(" ");
 186                                         pfract(flen);
 187                                         rval = 1;
 188                                 }
 189                                 break;
 190                         }
 191         if (!rval)
 192                 (void)printf("zero%s", lflag ? "" : ".\n");
 193         if (lflag)
 194                 (void)printf("\n");
 195 }
 196
 197 int
 198 unit(len, p)
 199         register int len;
 200         register char *p;
 201 {
 202         register int off, rval;
 203
 204         rval = 0;
 205         if (len > 3) {
 206                 if (len % 3) {
 207                         off = len % 3;
 208                         len -= off;
 209                         if (number(p, off)) {
 210                                 rval = 1;
 211                                 (void)printf(" %s%s",
 212                                     name3[len / 3], lflag ? " " : ".\n");
 213                         }
 214                         p += off;
 215                 }
 216                 for (; len > 3; p += 3) {
 217                         len -= 3;
 218                         if (number(p, 3)) {
 219                                 rval = 1;
 220                                 (void)printf(" %s%s",
 221                                     name3[len / 3], lflag ? " " : ".\n");
 222                         }
 223                 }
 224         }
 225         if (number(p, len)) {
 226                 if (!lflag)
 227                         (void)printf(".\n");
 228                 rval = 1;
 229         }
 230         return (rval);
 231 }
 232
 233 int
 234 number(p, len)
 235         register char *p;
 236         int len;
 237 {
 238         register int val, rval;
 239
 240         rval = 0;
 241         switch (len) {
 242         case 3:
 243                 if (*p != '0') {
 244                         rval = 1;
 245                         (void)printf("%s hundred", name1[*p - '0']);
 246                 }
 247                 ++p;
 248                 /* FALLTHROUGH */
 249         case 2:
 250                 val = (p[1] - '0') + (p[0] - '0') * 10;
 251                 if (val) {
 252                         if (rval)
 253                                 (void)printf(" ");
 254                         if (val < 20)
 255                                 (void)printf("%s", name1[val]);
 256                         else {
 257                                 (void)printf("%s", name2[val / 10]);
 258                                 if (val % 10)
 259                                         (void)printf("-%s", name1[val % 10]);
 260                         }
 261                         rval = 1;
 262                 }
 263                 break;
 264         case 1:
 265                 if (*p != '0') {
 266                         rval = 1;
 267                         (void)printf("%s", name1[*p - '0']);
 268                 }
 269         }
 270         return (rval);
 271 }
 272
 273 void
 274 pfract(len)
 275         int len;
 276 {
 277         static char *pref[] = { "", "ten-", "hundred-" };
 278
 279         switch(len) {
 280         case 1:
 281                 (void)printf("tenths.\n");
 282                 break;
 283         case 2:
 284                 (void)printf("hundredths.\n");
 285                 break;
 286         default:
 287                 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
 288                 break;
 289         }
 290 }
 291
 292 void
 293 usage()
 294 {
 295         (void)fprintf(stderr, "usage: number [# ...]\n");
 296         exit(1);
 297 }