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 void convert (char *); 68 int number (char *, int); 69 void pfract (int); 70 void toobig (void); 71 int unit (int, char *); 72 void usage (void); 73 74 int lflag; 75 76 int 77 main(int argc, char **argv) 78 { 79 int ch, first; 80 char line[256]; 81 82 lflag = 0; 83 while ((ch = getopt(argc, argv, "l")) != -1) 84 switch (ch) { 85 case 'l': 86 lflag = 1; 87 break; 88 case '?': 89 default: 90 usage(); 91 } 92 argc -= optind; 93 argv += optind; 94 95 if (*argv == NULL) 96 for (first = 1; 97 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 98 if (strchr(line, '\n') == NULL) 99 errx(1, "line too long."); 100 if (!first) 101 printf("...\n"); 102 convert(line); 103 } 104 else 105 for (first = 1; *argv != NULL; first = 0, ++argv) { 106 if (!first) 107 printf("...\n"); 108 convert(*argv); 109 } 110 exit(0); 111 } 112 113 void 114 convert(char *line) 115 { 116 int flen, len, rval; 117 char *p, *fraction; 118 119 flen = 0; 120 fraction = NULL; 121 for (p = line; *p != '\0' && *p != '\n'; ++p) { 122 if (isblank(*p)) { 123 if (p == line) { 124 ++line; 125 continue; 126 } 127 goto badnum; 128 } 129 if (isdigit(*p)) 130 continue; 131 switch (*p) { 132 case '.': 133 if (fraction != NULL) 134 goto badnum; 135 fraction = p + 1; 136 *p = '\0'; 137 break; 138 case '-': 139 if (p == line) 140 break; 141 /* FALLTHROUGH */ 142 default: 143 badnum: errx(1, "illegal number: %s", line); 144 break; 145 } 146 } 147 *p = '\0'; 148 149 if ((len = strlen(line)) > MAXNUM || 150 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM))) 151 errx(1, "number too large, max %d digits.", MAXNUM); 152 153 if (*line == '-') { 154 printf("minus%s", lflag ? " " : "\n"); 155 ++line; 156 --len; 157 } 158 159 rval = len > 0 ? unit(len, line) : 0; 160 if (fraction != NULL && flen != 0) 161 for (p = fraction; *p != '\0'; ++p) 162 if (*p != '0') { 163 if (rval) 164 printf("%sand%s", 165 lflag ? " " : "", 166 lflag ? " " : "\n"); 167 if (unit(flen, fraction)) { 168 if (lflag) 169 printf(" "); 170 pfract(flen); 171 rval = 1; 172 } 173 break; 174 } 175 if (!rval) 176 printf("zero%s", lflag ? "" : ".\n"); 177 if (lflag) 178 printf("\n"); 179 } 180 181 int 182 unit(int len, char *p) 183 { 184 int off, rval; 185 186 rval = 0; 187 if (len > 3) { 188 if (len % 3) { 189 off = len % 3; 190 len -= off; 191 if (number(p, off)) { 192 rval = 1; 193 printf(" %s%s", 194 name3[len / 3], lflag ? " " : ".\n"); 195 } 196 p += off; 197 } 198 for (; len > 3; p += 3) { 199 len -= 3; 200 if (number(p, 3)) { 201 rval = 1; 202 printf(" %s%s", 203 name3[len / 3], lflag ? " " : ".\n"); 204 } 205 } 206 } 207 if (number(p, len)) { 208 if (!lflag) 209 printf(".\n"); 210 rval = 1; 211 } 212 return (rval); 213 } 214 215 int 216 number(char *p, int len) 217 { 218 int val, rval; 219 220 rval = 0; 221 switch (len) { 222 case 3: 223 if (*p != '0') { 224 rval = 1; 225 printf("%s hundred", name1[*p - '0']); 226 } 227 ++p; 228 /* FALLTHROUGH */ 229 case 2: 230 val = (p[1] - '0') + (p[0] - '0') * 10; 231 if (val) { 232 if (rval) 233 printf(" "); 234 if (val < 20) 235 printf("%s", name1[val]); 236 else { 237 printf("%s", name2[val / 10]); 238 if (val % 10) 239 printf("-%s", name1[val % 10]); 240 } 241 rval = 1; 242 } 243 break; 244 case 1: 245 if (*p != '0') { 246 rval = 1; 247 printf("%s", name1[*p - '0']); 248 } 249 } 250 return (rval); 251 } 252 253 void 254 pfract(int len) 255 { 256 static const char *pref[] = { "", "ten-", "hundred-" }; 257 258 switch(len) { 259 case 1: 260 printf("tenths.\n"); 261 break; 262 case 2: 263 printf("hundredths.\n"); 264 break; 265 default: 266 printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 267 break; 268 } 269 } 270 271 void 272 usage(void) 273 { 274 fprintf(stderr, "usage: number [# ...]\n"); 275 exit(1); 276 } 277