Annotation of src/games/number/number.c, Revision 1.16
1.16 ! dholland 1: /* $NetBSD: number.c,v 1.15 2012/06/19 05:46:09 dholland Exp $ */
1.3 cgd 2:
1.1 cgd 3: /*
1.3 cgd 4: * Copyright (c) 1988, 1993, 1994
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 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.
1.8 agc 15: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
1.5 lukem 32: #include <sys/cdefs.h>
1.1 cgd 33: #ifndef lint
1.12 lukem 34: __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
35: The Regents of the University of California. All rights reserved.");
1.1 cgd 36: #endif /* not lint */
37:
38: #ifndef lint
1.3 cgd 39: #if 0
1.4 tls 40: static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95";
1.3 cgd 41: #else
1.16 ! dholland 42: __RCSID("$NetBSD: number.c,v 1.15 2012/06/19 05:46:09 dholland Exp $");
1.3 cgd 43: #endif
1.1 cgd 44: #endif /* not lint */
45:
1.3 cgd 46: #include <sys/types.h>
47:
48: #include <ctype.h>
1.4 tls 49: #include <err.h>
1.1 cgd 50: #include <stdio.h>
1.3 cgd 51: #include <stdlib.h>
52: #include <string.h>
1.4 tls 53: #include <unistd.h>
1.1 cgd 54:
1.3 cgd 55: #define MAXNUM 65 /* Biggest number we handle. */
1.1 cgd 56:
1.7 jsm 57: static const char *const name1[] = {
1.1 cgd 58: "", "one", "two", "three",
59: "four", "five", "six", "seven",
60: "eight", "nine", "ten", "eleven",
61: "twelve", "thirteen", "fourteen", "fifteen",
62: "sixteen", "seventeen", "eighteen", "nineteen",
63: },
1.7 jsm 64: *const name2[] = {
1.1 cgd 65: "", "ten", "twenty", "thirty",
66: "forty", "fifty", "sixty", "seventy",
67: "eighty", "ninety",
68: },
1.7 jsm 69: *const name3[] = {
1.1 cgd 70: "hundred", "thousand", "million", "billion",
71: "trillion", "quadrillion", "quintillion", "sextillion",
72: "septillion", "octillion", "nonillion", "decillion",
73: "undecillion", "duodecillion", "tredecillion", "quattuordecillion",
74: "quindecillion", "sexdecillion",
75: "septendecillion", "octodecillion",
76: "novemdecillion", "vigintillion",
77: };
78:
1.9 jsm 79: int main(int, char *[]);
1.13 dholland 80: static void convert(char *);
1.16 ! dholland 81: static int number(const char *, size_t);
! 82: static void pfract(size_t);
! 83: static int unit(size_t, const char *);
1.13 dholland 84: static void usage(void) __dead;
1.3 cgd 85:
1.13 dholland 86: static int lflag;
1.3 cgd 87:
88: int
1.15 dholland 89: main(int argc, char *argv[])
1.3 cgd 90: {
91: int ch, first;
92: char line[256];
93:
94: lflag = 0;
1.5 lukem 95: while ((ch = getopt(argc, argv, "l")) != -1)
1.3 cgd 96: switch (ch) {
97: case 'l':
98: lflag = 1;
99: break;
100: case '?':
101: default:
102: usage();
103: }
104: argc -= optind;
105: argv += optind;
106:
107: if (*argv == NULL)
108: for (first = 1;
109: fgets(line, sizeof(line), stdin) != NULL; first = 0) {
110: if (strchr(line, '\n') == NULL)
111: errx(1, "line too long.");
112: if (!first)
113: (void)printf("...\n");
114: convert(line);
1.1 cgd 115: }
116: else
1.3 cgd 117: for (first = 1; *argv != NULL; first = 0, ++argv) {
118: if (!first)
119: (void)printf("...\n");
120: convert(*argv);
1.1 cgd 121: }
122: exit(0);
123: }
124:
1.3 cgd 125: void
1.15 dholland 126: convert(char *line)
1.1 cgd 127: {
1.16 ! dholland 128: size_t flen, len;
! 129: int rval;
1.5 lukem 130: char *p, *fraction;
1.3 cgd 131:
1.5 lukem 132: flen = 0;
1.3 cgd 133: fraction = NULL;
134: for (p = line; *p != '\0' && *p != '\n'; ++p) {
1.14 tnozaki 135: if (isblank((unsigned char)*p)) {
1.3 cgd 136: if (p == line) {
137: ++line;
138: continue;
139: }
140: goto badnum;
141: }
1.10 dsl 142: if (isdigit((unsigned char)*p))
1.3 cgd 143: continue;
144: switch (*p) {
145: case '.':
146: if (fraction != NULL)
147: goto badnum;
148: fraction = p + 1;
149: *p = '\0';
150: break;
151: case '-':
152: if (p == line)
1.1 cgd 153: break;
1.3 cgd 154: /* FALLTHROUGH */
155: default:
156: badnum: errx(1, "illegal number: %s", line);
157: break;
158: }
159: }
160: *p = '\0';
161:
162: if ((len = strlen(line)) > MAXNUM ||
1.5 lukem 163: (fraction != NULL && (flen = strlen(fraction)) > MAXNUM))
1.3 cgd 164: errx(1, "number too large, max %d digits.", MAXNUM);
165:
1.1 cgd 166: if (*line == '-') {
1.3 cgd 167: (void)printf("minus%s", lflag ? " " : "\n");
1.1 cgd 168: ++line;
1.6 hubertf 169: --len;
1.1 cgd 170: }
1.3 cgd 171:
172: rval = len > 0 ? unit(len, line) : 0;
173: if (fraction != NULL && flen != 0)
174: for (p = fraction; *p != '\0'; ++p)
175: if (*p != '0') {
176: if (rval)
177: (void)printf("%sand%s",
178: lflag ? " " : "",
179: lflag ? " " : "\n");
180: if (unit(flen, fraction)) {
181: if (lflag)
182: (void)printf(" ");
183: pfract(flen);
184: rval = 1;
1.1 cgd 185: }
186: break;
187: }
1.3 cgd 188: if (!rval)
189: (void)printf("zero%s", lflag ? "" : ".\n");
190: if (lflag)
191: (void)printf("\n");
1.1 cgd 192: }
193:
1.3 cgd 194: int
1.16 ! dholland 195: unit(size_t len, const char *p)
1.1 cgd 196: {
1.16 ! dholland 197: size_t off;
! 198: int rval;
1.1 cgd 199:
1.3 cgd 200: rval = 0;
1.1 cgd 201: if (len > 3) {
202: if (len % 3) {
203: off = len % 3;
204: len -= off;
1.3 cgd 205: if (number(p, off)) {
206: rval = 1;
207: (void)printf(" %s%s",
208: name3[len / 3], lflag ? " " : ".\n");
1.1 cgd 209: }
1.3 cgd 210: p += off;
1.1 cgd 211: }
1.3 cgd 212: for (; len > 3; p += 3) {
1.1 cgd 213: len -= 3;
1.3 cgd 214: if (number(p, 3)) {
215: rval = 1;
216: (void)printf(" %s%s",
217: name3[len / 3], lflag ? " " : ".\n");
1.1 cgd 218: }
219: }
220: }
1.3 cgd 221: if (number(p, len)) {
222: if (!lflag)
223: (void)printf(".\n");
224: rval = 1;
1.1 cgd 225: }
1.3 cgd 226: return (rval);
1.1 cgd 227: }
228:
1.3 cgd 229: int
1.16 ! dholland 230: number(const char *p, size_t len)
1.1 cgd 231: {
1.5 lukem 232: int val, rval;
1.1 cgd 233:
1.3 cgd 234: rval = 0;
235: switch (len) {
1.1 cgd 236: case 3:
1.3 cgd 237: if (*p != '0') {
238: rval = 1;
239: (void)printf("%s hundred", name1[*p - '0']);
1.1 cgd 240: }
1.3 cgd 241: ++p;
242: /* FALLTHROUGH */
1.1 cgd 243: case 2:
1.3 cgd 244: val = (p[1] - '0') + (p[0] - '0') * 10;
1.1 cgd 245: if (val) {
1.3 cgd 246: if (rval)
247: (void)printf(" ");
1.1 cgd 248: if (val < 20)
1.3 cgd 249: (void)printf("%s", name1[val]);
1.1 cgd 250: else {
1.3 cgd 251: (void)printf("%s", name2[val / 10]);
1.1 cgd 252: if (val % 10)
1.3 cgd 253: (void)printf("-%s", name1[val % 10]);
1.1 cgd 254: }
1.3 cgd 255: rval = 1;
1.1 cgd 256: }
257: break;
258: case 1:
1.3 cgd 259: if (*p != '0') {
260: rval = 1;
261: (void)printf("%s", name1[*p - '0']);
1.1 cgd 262: }
263: }
1.3 cgd 264: return (rval);
1.1 cgd 265: }
266:
1.3 cgd 267: void
1.16 ! dholland 268: pfract(size_t len)
1.1 cgd 269: {
1.7 jsm 270: static const char *const pref[] = { "", "ten-", "hundred-" };
1.1 cgd 271:
272: switch(len) {
273: case 1:
1.3 cgd 274: (void)printf("tenths.\n");
1.1 cgd 275: break;
276: case 2:
1.3 cgd 277: (void)printf("hundredths.\n");
1.1 cgd 278: break;
279: default:
1.3 cgd 280: (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
281: break;
1.1 cgd 282: }
283: }
284:
1.3 cgd 285: void
1.15 dholland 286: usage(void)
1.1 cgd 287: {
1.3 cgd 288: (void)fprintf(stderr, "usage: number [# ...]\n");
289: exit(1);
1.1 cgd 290: }
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