Clean up:
[dragonfly.git] / 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  * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California.  All rights reserved.
34  * @(#)number.c 8.3 (Berkeley) 5/4/95
35  * $FreeBSD: src/games/number/number.c,v 1.12 1999/12/12 03:22:35 billf Exp $
36  * $DragonFly: src/games/number/number.c,v 1.3 2003/11/12 14:53:53 eirikn Exp $
37  */
38
39 #include <sys/types.h>
40
41 #include <ctype.h>
42 #include <err.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 #define MAXNUM          65              /* Biggest number we handle. */
49
50 static const char       *name1[] = {
51         "",             "one",          "two",          "three",
52         "four",         "five",         "six",          "seven",
53         "eight",        "nine",         "ten",          "eleven",
54         "twelve",       "thirteen",     "fourteen",     "fifteen",
55         "sixteen",      "seventeen",    "eighteen",     "nineteen",
56 },
57                 *name2[] = {
58         "",             "ten",          "twenty",       "thirty",
59         "forty",        "fifty",        "sixty",        "seventy",
60         "eighty",       "ninety",
61 },
62                 *name3[] = {
63         "hundred",      "thousand",     "million",      "billion",
64         "trillion",     "quadrillion",  "quintillion",  "sextillion",
65         "septillion",   "octillion",    "nonillion",    "decillion",
66         "undecillion",  "duodecillion", "tredecillion", "quattuordecillion",
67         "quindecillion",                "sexdecillion",
68         "septendecillion",              "octodecillion",
69         "novemdecillion",               "vigintillion",
70 };
71
72 void    convert (char *);
73 int     number (char *, int);
74 void    pfract (int);
75 void    toobig (void);
76 int     unit (int, char *);
77 void    usage (void);
78
79 int lflag;
80
81 int
82 main(argc, argv)
83         int argc;
84         char *argv[];
85 {
86         int ch, first;
87         char line[256];
88
89         lflag = 0;
90         while ((ch = getopt(argc, argv, "l")) != -1)
91                 switch (ch) {
92                 case 'l':
93                         lflag = 1;
94                         break;
95                 case '?':
96                 default:
97                         usage();
98                 }
99         argc -= optind;
100         argv += optind;
101
102         if (*argv == NULL)
103                 for (first = 1;
104                     fgets(line, sizeof(line), stdin) != NULL; first = 0) {
105                         if (strchr(line, '\n') == NULL)
106                                 errx(1, "line too long.");
107                         if (!first)
108                                 (void)printf("...\n");
109                         convert(line);
110                 }
111         else
112                 for (first = 1; *argv != NULL; first = 0, ++argv) {
113                         if (!first)
114                                 (void)printf("...\n");
115                         convert(*argv);
116                 }
117         exit(0);
118 }
119
120 void
121 convert(line)
122         char *line;
123 {
124         int flen, len, rval;
125         char *p, *fraction;
126
127         flen = NULL;
128         fraction = NULL;
129         for (p = line; *p != '\0' && *p != '\n'; ++p) {
130                 if (isblank(*p)) {
131                         if (p == line) {
132                                 ++line;
133                                 continue;
134                         }
135                         goto badnum;
136                 }
137                 if (isdigit(*p))
138                         continue;
139                 switch (*p) {
140                 case '.':
141                         if (fraction != NULL)
142                                 goto badnum;
143                         fraction = p + 1;
144                         *p = '\0';
145                         break;
146                 case '-':
147                         if (p == line)
148                                 break;
149                         /* FALLTHROUGH */
150                 default:
151 badnum:                 errx(1, "illegal number: %s", line);
152                         break;
153                 }
154         }
155         *p = '\0';
156
157         if ((len = strlen(line)) > MAXNUM ||
158             (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM)))
159                 errx(1, "number too large, max %d digits.", MAXNUM);
160
161         if (*line == '-') {
162                 (void)printf("minus%s", lflag ? " " : "\n");
163                 ++line;
164                 --len;
165         }
166
167         rval = len > 0 ? unit(len, line) : 0;
168         if (fraction != NULL && flen != 0)
169                 for (p = fraction; *p != '\0'; ++p)
170                         if (*p != '0') {
171                                 if (rval)
172                                         (void)printf("%sand%s",
173                                             lflag ? " " : "",
174                                             lflag ? " " : "\n");
175                                 if (unit(flen, fraction)) {
176                                         if (lflag)
177                                                 (void)printf(" ");
178                                         pfract(flen);
179                                         rval = 1;
180                                 }
181                                 break;
182                         }
183         if (!rval)
184                 (void)printf("zero%s", lflag ? "" : ".\n");
185         if (lflag)
186                 (void)printf("\n");
187 }
188
189 int
190 unit(len, p)
191         int len;
192         char *p;
193 {
194         int off, rval;
195
196         rval = 0;
197         if (len > 3) {
198                 if (len % 3) {
199                         off = len % 3;
200                         len -= off;
201                         if (number(p, off)) {
202                                 rval = 1;
203                                 (void)printf(" %s%s",
204                                     name3[len / 3], lflag ? " " : ".\n");
205                         }
206                         p += off;
207                 }
208                 for (; len > 3; p += 3) {
209                         len -= 3;
210                         if (number(p, 3)) {
211                                 rval = 1;
212                                 (void)printf(" %s%s",
213                                     name3[len / 3], lflag ? " " : ".\n");
214                         }
215                 }
216         }
217         if (number(p, len)) {
218                 if (!lflag)
219                         (void)printf(".\n");
220                 rval = 1;
221         }
222         return (rval);
223 }
224
225 int
226 number(p, len)
227         char *p;
228         int len;
229 {
230         int val, rval;
231
232         rval = 0;
233         switch (len) {
234         case 3:
235                 if (*p != '0') {
236                         rval = 1;
237                         (void)printf("%s hundred", name1[*p - '0']);
238                 }
239                 ++p;
240                 /* FALLTHROUGH */
241         case 2:
242                 val = (p[1] - '0') + (p[0] - '0') * 10;
243                 if (val) {
244                         if (rval)
245                                 (void)printf(" ");
246                         if (val < 20)
247                                 (void)printf("%s", name1[val]);
248                         else {
249                                 (void)printf("%s", name2[val / 10]);
250                                 if (val % 10)
251                                         (void)printf("-%s", name1[val % 10]);
252                         }
253                         rval = 1;
254                 }
255                 break;
256         case 1:
257                 if (*p != '0') {
258                         rval = 1;
259                         (void)printf("%s", name1[*p - '0']);
260                 }
261         }
262         return (rval);
263 }
264
265 void
266 pfract(len)
267         int len;
268 {
269         static char *pref[] = { "", "ten-", "hundred-" };
270
271         switch(len) {
272         case 1:
273                 (void)printf("tenths.\n");
274                 break;
275         case 2:
276                 (void)printf("hundredths.\n");
277                 break;
278         default:
279                 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
280                 break;
281         }
282 }
283
284 void
285 usage()
286 {
287         (void)fprintf(stderr, "usage: number [# ...]\n");
288         exit(1);
289 }