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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1988, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #endif /* not lint */
35
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95";
39 #endif
40 static const char rcsid[] =
41 "$FreeBSD$";
42 #endif /* not lint */
43
44 #include <sys/types.h>
45
46 #include <ctype.h>
47 #include <err.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <unistd.h>
52
53 #define MAXNUM 65 /* Biggest number we handle. */
54
55 static const char *name1[] = {
56 "", "one", "two", "three",
57 "four", "five", "six", "seven",
58 "eight", "nine", "ten", "eleven",
59 "twelve", "thirteen", "fourteen", "fifteen",
60 "sixteen", "seventeen", "eighteen", "nineteen",
61 },
62 *name2[] = {
63 "", "ten", "twenty", "thirty",
64 "forty", "fifty", "sixty", "seventy",
65 "eighty", "ninety",
66 },
67 *name3[] = {
68 "hundred", "thousand", "million", "billion",
69 "trillion", "quadrillion", "quintillion", "sextillion",
70 "septillion", "octillion", "nonillion", "decillion",
71 "undecillion", "duodecillion", "tredecillion", "quattuordecillion",
72 "quindecillion", "sexdecillion",
73 "septendecillion", "octodecillion",
74 "novemdecillion", "vigintillion",
75 };
76
77 static void convert(char *);
78 static int number(char *, int);
79 static void pfract(int);
80 static int unit(int, char *);
81 static void usage(void);
82
83 static int lflag;
84
85 int
main(int argc,char * argv[])86 main(int argc, char *argv[])
87 {
88 int ch, first;
89 char line[256];
90
91 lflag = 0;
92 while ((ch = getopt(argc, argv, "l")) != -1)
93 switch (ch) {
94 case 'l':
95 lflag = 1;
96 break;
97 case '?':
98 default:
99 usage();
100 }
101 argc -= optind;
102 argv += optind;
103
104 if (*argv == NULL)
105 for (first = 1;
106 fgets(line, sizeof(line), stdin) != NULL; first = 0) {
107 if (strchr(line, '\n') == NULL)
108 errx(1, "line too long.");
109 if (!first)
110 (void)printf("...\n");
111 convert(line);
112 }
113 else
114 for (first = 1; *argv != NULL; first = 0, ++argv) {
115 if (!first)
116 (void)printf("...\n");
117 convert(*argv);
118 }
119 exit(0);
120 }
121
122 static void
convert(char * line)123 convert(char *line)
124 {
125 int flen, len, rval;
126 char *p, *fraction;
127
128 flen = 0;
129 fraction = NULL;
130 for (p = line; *p != '\0' && *p != '\n'; ++p) {
131 if (isblank(*p)) {
132 if (p == line) {
133 ++line;
134 continue;
135 }
136 goto badnum;
137 }
138 if (isdigit(*p))
139 continue;
140 switch (*p) {
141 case '.':
142 if (fraction != NULL)
143 goto badnum;
144 fraction = p + 1;
145 *p = '\0';
146 break;
147 case '-':
148 if (p == line)
149 break;
150 /* FALLTHROUGH */
151 default:
152 badnum: errx(1, "illegal number: %s", line);
153 break;
154 }
155 }
156 *p = '\0';
157
158 if ((len = strlen(line)) > MAXNUM ||
159 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM)))
160 errx(1, "number too large, max %d digits.", MAXNUM);
161
162 if (*line == '-') {
163 (void)printf("minus%s", lflag ? " " : "\n");
164 ++line;
165 --len;
166 }
167
168 rval = len > 0 ? unit(len, line) : 0;
169 if (fraction != NULL && flen != 0)
170 for (p = fraction; *p != '\0'; ++p)
171 if (*p != '0') {
172 if (rval)
173 (void)printf("%sand%s",
174 lflag ? " " : "",
175 lflag ? " " : "\n");
176 if (unit(flen, fraction)) {
177 if (lflag)
178 (void)printf(" ");
179 pfract(flen);
180 rval = 1;
181 }
182 break;
183 }
184 if (!rval)
185 (void)printf("zero%s", lflag ? "" : ".\n");
186 if (lflag)
187 (void)printf("\n");
188 }
189
190 static int
unit(int len,char * p)191 unit(int len, char *p)
192 {
193 int off, rval;
194
195 rval = 0;
196 if (len > 3) {
197 if (len % 3) {
198 off = len % 3;
199 len -= off;
200 if (number(p, off)) {
201 rval = 1;
202 (void)printf(" %s%s",
203 name3[len / 3], lflag ? " " : ".\n");
204 }
205 p += off;
206 }
207 for (; len > 3; p += 3) {
208 len -= 3;
209 if (number(p, 3)) {
210 rval = 1;
211 (void)printf(" %s%s",
212 name3[len / 3], lflag ? " " : ".\n");
213 }
214 }
215 }
216 if (number(p, len)) {
217 if (!lflag)
218 (void)printf(".\n");
219 rval = 1;
220 }
221 return (rval);
222 }
223
224 static int
number(char * p,int len)225 number(char *p, int len)
226 {
227 int val, rval;
228
229 rval = 0;
230 switch (len) {
231 case 3:
232 if (*p != '0') {
233 rval = 1;
234 (void)printf("%s hundred", name1[*p - '0']);
235 }
236 ++p;
237 /* FALLTHROUGH */
238 case 2:
239 val = (p[1] - '0') + (p[0] - '0') * 10;
240 if (val) {
241 if (rval)
242 (void)printf(" ");
243 if (val < 20)
244 (void)printf("%s", name1[val]);
245 else {
246 (void)printf("%s", name2[val / 10]);
247 if (val % 10)
248 (void)printf("-%s", name1[val % 10]);
249 }
250 rval = 1;
251 }
252 break;
253 case 1:
254 if (*p != '0') {
255 rval = 1;
256 (void)printf("%s", name1[*p - '0']);
257 }
258 }
259 return (rval);
260 }
261
262 static void
pfract(int len)263 pfract(int len)
264 {
265 static char const * const pref[] = { "", "ten-", "hundred-" };
266
267 switch(len) {
268 case 1:
269 (void)printf("tenths.\n");
270 break;
271 case 2:
272 (void)printf("hundredths.\n");
273 break;
274 default:
275 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
276 break;
277 }
278 }
279
280 static void
usage(void)281 usage(void)
282 {
283 (void)fprintf(stderr, "usage: number [-l] [# ...]\n");
284 exit(1);
285 }
286