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 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)number.c 8.3 (Berkeley) 5/4/95 31 * $FreeBSD: src/games/number/number.c,v 1.12 1999/12/12 03:22:35 billf Exp $ 32 */ 33 34 #include <sys/types.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 #define MAXNUM 65 /* Biggest number we handle. */ 44 45 static const char *name1[] = { 46 "", "one", "two", "three", 47 "four", "five", "six", "seven", 48 "eight", "nine", "ten", "eleven", 49 "twelve", "thirteen", "fourteen", "fifteen", 50 "sixteen", "seventeen", "eighteen", "nineteen", 51 }, 52 *name2[] = { 53 "", "ten", "twenty", "thirty", 54 "forty", "fifty", "sixty", "seventy", 55 "eighty", "ninety", 56 }, 57 *name3[] = { 58 "hundred", "thousand", "million", "billion", 59 "trillion", "quadrillion", "quintillion", "sextillion", 60 "septillion", "octillion", "nonillion", "decillion", 61 "undecillion", "duodecillion", "tredecillion", "quattuordecillion", 62 "quindecillion", "sexdecillion", 63 "septendecillion", "octodecillion", 64 "novemdecillion", "vigintillion", 65 }; 66 67 static void convert(char *); 68 static int number(char *, int); 69 static void pfract(int); 70 static int unit(int, char *); 71 static void usage(void) __dead2; 72 73 static int lflag; 74 75 int 76 main(int argc, char **argv) 77 { 78 int ch, first; 79 char line[256]; 80 81 lflag = 0; 82 while ((ch = getopt(argc, argv, "l")) != -1) 83 switch (ch) { 84 case 'l': 85 lflag = 1; 86 break; 87 case '?': 88 default: 89 usage(); 90 } 91 argc -= optind; 92 argv += optind; 93 94 if (*argv == NULL) 95 for (first = 1; 96 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 97 if (strchr(line, '\n') == NULL) 98 errx(1, "line too long."); 99 if (!first) 100 printf("...\n"); 101 convert(line); 102 } 103 else 104 for (first = 1; *argv != NULL; first = 0, ++argv) { 105 if (!first) 106 printf("...\n"); 107 convert(*argv); 108 } 109 exit(0); 110 } 111 112 static void 113 convert(char *line) 114 { 115 int flen, len, rval; 116 char *p, *fraction; 117 118 flen = 0; 119 fraction = NULL; 120 for (p = line; *p != '\0' && *p != '\n'; ++p) { 121 if (isblank(*p)) { 122 if (p == line) { 123 ++line; 124 continue; 125 } 126 goto badnum; 127 } 128 if (isdigit(*p)) 129 continue; 130 switch (*p) { 131 case '.': 132 if (fraction != NULL) 133 goto badnum; 134 fraction = p + 1; 135 *p = '\0'; 136 break; 137 case '-': 138 if (p == line) 139 break; 140 /* FALLTHROUGH */ 141 default: 142 badnum: errx(1, "illegal number: %s", line); 143 break; 144 } 145 } 146 *p = '\0'; 147 148 if ((len = strlen(line)) > MAXNUM || 149 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM))) 150 errx(1, "number too large, max %d digits.", MAXNUM); 151 152 if (*line == '-') { 153 printf("minus%s", lflag ? " " : "\n"); 154 ++line; 155 --len; 156 } 157 158 rval = len > 0 ? unit(len, line) : 0; 159 if (fraction != NULL && flen != 0) 160 for (p = fraction; *p != '\0'; ++p) 161 if (*p != '0') { 162 if (rval) 163 printf("%sand%s", 164 lflag ? " " : "", 165 lflag ? " " : "\n"); 166 if (unit(flen, fraction)) { 167 if (lflag) 168 printf(" "); 169 pfract(flen); 170 rval = 1; 171 } 172 break; 173 } 174 if (!rval) 175 printf("zero%s", lflag ? "" : ".\n"); 176 if (lflag) 177 printf("\n"); 178 } 179 180 static int 181 unit(int len, char *p) 182 { 183 int off, rval; 184 185 rval = 0; 186 if (len > 3) { 187 if (len % 3) { 188 off = len % 3; 189 len -= off; 190 if (number(p, off)) { 191 rval = 1; 192 printf(" %s%s", 193 name3[len / 3], lflag ? " " : ".\n"); 194 } 195 p += off; 196 } 197 for (; len > 3; p += 3) { 198 len -= 3; 199 if (number(p, 3)) { 200 rval = 1; 201 printf(" %s%s", 202 name3[len / 3], lflag ? " " : ".\n"); 203 } 204 } 205 } 206 if (number(p, len)) { 207 if (!lflag) 208 printf(".\n"); 209 rval = 1; 210 } 211 return (rval); 212 } 213 214 static int 215 number(char *p, int len) 216 { 217 int val, rval; 218 219 rval = 0; 220 switch (len) { 221 case 3: 222 if (*p != '0') { 223 rval = 1; 224 printf("%s hundred", name1[*p - '0']); 225 } 226 ++p; 227 /* FALLTHROUGH */ 228 case 2: 229 val = (p[1] - '0') + (p[0] - '0') * 10; 230 if (val) { 231 if (rval) 232 printf(" "); 233 if (val < 20) 234 printf("%s", name1[val]); 235 else { 236 printf("%s", name2[val / 10]); 237 if (val % 10) 238 printf("-%s", name1[val % 10]); 239 } 240 rval = 1; 241 } 242 break; 243 case 1: 244 if (*p != '0') { 245 rval = 1; 246 printf("%s", name1[*p - '0']); 247 } 248 } 249 return (rval); 250 } 251 252 static void 253 pfract(int len) 254 { 255 static const char *pref[] = { "", "ten-", "hundred-" }; 256 257 switch(len) { 258 case 1: 259 printf("tenths.\n"); 260 break; 261 case 2: 262 printf("hundredths.\n"); 263 break; 264 default: 265 printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 266 break; 267 } 268 } 269 270 static void 271 usage(void) 272 { 273 fprintf(stderr, "usage: number [# ...]\n"); 274 exit(1); 275 } 276