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 * $DragonFly: src/games/number/number.c,v 1.5 2008/06/05 18:06:30 swildner Exp $ 33 */ 34 35 #include <sys/types.h> 36 37 #include <ctype.h> 38 #include <err.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #define MAXNUM 65 /* Biggest number we handle. */ 45 46 static const char *name1[] = { 47 "", "one", "two", "three", 48 "four", "five", "six", "seven", 49 "eight", "nine", "ten", "eleven", 50 "twelve", "thirteen", "fourteen", "fifteen", 51 "sixteen", "seventeen", "eighteen", "nineteen", 52 }, 53 *name2[] = { 54 "", "ten", "twenty", "thirty", 55 "forty", "fifty", "sixty", "seventy", 56 "eighty", "ninety", 57 }, 58 *name3[] = { 59 "hundred", "thousand", "million", "billion", 60 "trillion", "quadrillion", "quintillion", "sextillion", 61 "septillion", "octillion", "nonillion", "decillion", 62 "undecillion", "duodecillion", "tredecillion", "quattuordecillion", 63 "quindecillion", "sexdecillion", 64 "septendecillion", "octodecillion", 65 "novemdecillion", "vigintillion", 66 }; 67 68 void convert (char *); 69 int number (char *, int); 70 void pfract (int); 71 void toobig (void); 72 int unit (int, char *); 73 void usage (void); 74 75 int lflag; 76 77 int 78 main(int argc, char **argv) 79 { 80 int ch, first; 81 char line[256]; 82 83 lflag = 0; 84 while ((ch = getopt(argc, argv, "l")) != -1) 85 switch (ch) { 86 case 'l': 87 lflag = 1; 88 break; 89 case '?': 90 default: 91 usage(); 92 } 93 argc -= optind; 94 argv += optind; 95 96 if (*argv == NULL) 97 for (first = 1; 98 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 99 if (strchr(line, '\n') == NULL) 100 errx(1, "line too long."); 101 if (!first) 102 (void)printf("...\n"); 103 convert(line); 104 } 105 else 106 for (first = 1; *argv != NULL; first = 0, ++argv) { 107 if (!first) 108 (void)printf("...\n"); 109 convert(*argv); 110 } 111 exit(0); 112 } 113 114 void 115 convert(char *line) 116 { 117 int flen, len, rval; 118 char *p, *fraction; 119 120 flen = 0; 121 fraction = NULL; 122 for (p = line; *p != '\0' && *p != '\n'; ++p) { 123 if (isblank(*p)) { 124 if (p == line) { 125 ++line; 126 continue; 127 } 128 goto badnum; 129 } 130 if (isdigit(*p)) 131 continue; 132 switch (*p) { 133 case '.': 134 if (fraction != NULL) 135 goto badnum; 136 fraction = p + 1; 137 *p = '\0'; 138 break; 139 case '-': 140 if (p == line) 141 break; 142 /* FALLTHROUGH */ 143 default: 144 badnum: errx(1, "illegal number: %s", line); 145 break; 146 } 147 } 148 *p = '\0'; 149 150 if ((len = strlen(line)) > MAXNUM || 151 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM))) 152 errx(1, "number too large, max %d digits.", MAXNUM); 153 154 if (*line == '-') { 155 (void)printf("minus%s", lflag ? " " : "\n"); 156 ++line; 157 --len; 158 } 159 160 rval = len > 0 ? unit(len, line) : 0; 161 if (fraction != NULL && flen != 0) 162 for (p = fraction; *p != '\0'; ++p) 163 if (*p != '0') { 164 if (rval) 165 (void)printf("%sand%s", 166 lflag ? " " : "", 167 lflag ? " " : "\n"); 168 if (unit(flen, fraction)) { 169 if (lflag) 170 (void)printf(" "); 171 pfract(flen); 172 rval = 1; 173 } 174 break; 175 } 176 if (!rval) 177 (void)printf("zero%s", lflag ? "" : ".\n"); 178 if (lflag) 179 (void)printf("\n"); 180 } 181 182 int 183 unit(int len, char *p) 184 { 185 int off, rval; 186 187 rval = 0; 188 if (len > 3) { 189 if (len % 3) { 190 off = len % 3; 191 len -= off; 192 if (number(p, off)) { 193 rval = 1; 194 (void)printf(" %s%s", 195 name3[len / 3], lflag ? " " : ".\n"); 196 } 197 p += off; 198 } 199 for (; len > 3; p += 3) { 200 len -= 3; 201 if (number(p, 3)) { 202 rval = 1; 203 (void)printf(" %s%s", 204 name3[len / 3], lflag ? " " : ".\n"); 205 } 206 } 207 } 208 if (number(p, len)) { 209 if (!lflag) 210 (void)printf(".\n"); 211 rval = 1; 212 } 213 return (rval); 214 } 215 216 int 217 number(char *p, int len) 218 { 219 int val, rval; 220 221 rval = 0; 222 switch (len) { 223 case 3: 224 if (*p != '0') { 225 rval = 1; 226 (void)printf("%s hundred", name1[*p - '0']); 227 } 228 ++p; 229 /* FALLTHROUGH */ 230 case 2: 231 val = (p[1] - '0') + (p[0] - '0') * 10; 232 if (val) { 233 if (rval) 234 (void)printf(" "); 235 if (val < 20) 236 (void)printf("%s", name1[val]); 237 else { 238 (void)printf("%s", name2[val / 10]); 239 if (val % 10) 240 (void)printf("-%s", name1[val % 10]); 241 } 242 rval = 1; 243 } 244 break; 245 case 1: 246 if (*p != '0') { 247 rval = 1; 248 (void)printf("%s", name1[*p - '0']); 249 } 250 } 251 return (rval); 252 } 253 254 void 255 pfract(int len) 256 { 257 static const char *pref[] = { "", "ten-", "hundred-" }; 258 259 switch(len) { 260 case 1: 261 (void)printf("tenths.\n"); 262 break; 263 case 2: 264 (void)printf("hundredths.\n"); 265 break; 266 default: 267 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 268 break; 269 } 270 } 271 272 void 273 usage(void) 274 { 275 (void)fprintf(stderr, "usage: number [# ...]\n"); 276 exit(1); 277 } 278