Initial import from FreeBSD RELENG_4:
[dragonfly.git] / games / number / number.c
CommitLineData
984263bc
MD
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
35static 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
42static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95";
43#endif
44static 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
59static 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
81void convert __P((char *));
82int number __P((char *, int));
83void pfract __P((int));
84void toobig __P((void));
85int unit __P((int, char *));
86void usage __P((void));
87
88int lflag;
89
90int
91main(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
129void
130convert(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:
160badnum: 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
198int
199unit(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
234int
235number(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
274void
275pfract(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
293void
294usage()
295{
296 (void)fprintf(stderr, "usage: number [# ...]\n");
297 exit(1);
298}