1 /* $NetBSD: number.c,v 1.14 2010/05/13 17:52:11 tnozaki Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 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. 15 * 3. Neither the name of the University nor the names of its contributors 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 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95"; 41 #else 42 __RCSID("$NetBSD: number.c,v 1.14 2010/05/13 17:52:11 tnozaki Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/types.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #define MAXNUM 65 /* Biggest number we handle. */ 56 57 static const char *const name1[] = { 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 }, 64 *const name2[] = { 65 "", "ten", "twenty", "thirty", 66 "forty", "fifty", "sixty", "seventy", 67 "eighty", "ninety", 68 }, 69 *const name3[] = { 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 79 int main(int, char *[]); 80 static void convert(char *); 81 static int number(const char *, int); 82 static void pfract(int); 83 static int unit(int, const char *); 84 static void usage(void) __dead; 85 86 static int lflag; 87 88 int 89 main(argc, argv) 90 int argc; 91 char *argv[]; 92 { 93 int ch, first; 94 char line[256]; 95 96 lflag = 0; 97 while ((ch = getopt(argc, argv, "l")) != -1) 98 switch (ch) { 99 case 'l': 100 lflag = 1; 101 break; 102 case '?': 103 default: 104 usage(); 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (*argv == NULL) 110 for (first = 1; 111 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 112 if (strchr(line, '\n') == NULL) 113 errx(1, "line too long."); 114 if (!first) 115 (void)printf("...\n"); 116 convert(line); 117 } 118 else 119 for (first = 1; *argv != NULL; first = 0, ++argv) { 120 if (!first) 121 (void)printf("...\n"); 122 convert(*argv); 123 } 124 exit(0); 125 } 126 127 void 128 convert(line) 129 char *line; 130 { 131 int flen, len, rval; 132 char *p, *fraction; 133 134 flen = 0; 135 fraction = NULL; 136 for (p = line; *p != '\0' && *p != '\n'; ++p) { 137 if (isblank((unsigned char)*p)) { 138 if (p == line) { 139 ++line; 140 continue; 141 } 142 goto badnum; 143 } 144 if (isdigit((unsigned char)*p)) 145 continue; 146 switch (*p) { 147 case '.': 148 if (fraction != NULL) 149 goto badnum; 150 fraction = p + 1; 151 *p = '\0'; 152 break; 153 case '-': 154 if (p == line) 155 break; 156 /* FALLTHROUGH */ 157 default: 158 badnum: errx(1, "illegal number: %s", line); 159 break; 160 } 161 } 162 *p = '\0'; 163 164 if ((len = strlen(line)) > MAXNUM || 165 (fraction != NULL && (flen = strlen(fraction)) > MAXNUM)) 166 errx(1, "number too large, max %d digits.", MAXNUM); 167 168 if (*line == '-') { 169 (void)printf("minus%s", lflag ? " " : "\n"); 170 ++line; 171 --len; 172 } 173 174 rval = len > 0 ? unit(len, line) : 0; 175 if (fraction != NULL && flen != 0) 176 for (p = fraction; *p != '\0'; ++p) 177 if (*p != '0') { 178 if (rval) 179 (void)printf("%sand%s", 180 lflag ? " " : "", 181 lflag ? " " : "\n"); 182 if (unit(flen, fraction)) { 183 if (lflag) 184 (void)printf(" "); 185 pfract(flen); 186 rval = 1; 187 } 188 break; 189 } 190 if (!rval) 191 (void)printf("zero%s", lflag ? "" : ".\n"); 192 if (lflag) 193 (void)printf("\n"); 194 } 195 196 int 197 unit(len, p) 198 int len; 199 const char *p; 200 { 201 int off, rval; 202 203 rval = 0; 204 if (len > 3) { 205 if (len % 3) { 206 off = len % 3; 207 len -= off; 208 if (number(p, off)) { 209 rval = 1; 210 (void)printf(" %s%s", 211 name3[len / 3], lflag ? " " : ".\n"); 212 } 213 p += off; 214 } 215 for (; len > 3; p += 3) { 216 len -= 3; 217 if (number(p, 3)) { 218 rval = 1; 219 (void)printf(" %s%s", 220 name3[len / 3], lflag ? " " : ".\n"); 221 } 222 } 223 } 224 if (number(p, len)) { 225 if (!lflag) 226 (void)printf(".\n"); 227 rval = 1; 228 } 229 return (rval); 230 } 231 232 int 233 number(p, len) 234 const char *p; 235 int len; 236 { 237 int val, rval; 238 239 rval = 0; 240 switch (len) { 241 case 3: 242 if (*p != '0') { 243 rval = 1; 244 (void)printf("%s hundred", name1[*p - '0']); 245 } 246 ++p; 247 /* FALLTHROUGH */ 248 case 2: 249 val = (p[1] - '0') + (p[0] - '0') * 10; 250 if (val) { 251 if (rval) 252 (void)printf(" "); 253 if (val < 20) 254 (void)printf("%s", name1[val]); 255 else { 256 (void)printf("%s", name2[val / 10]); 257 if (val % 10) 258 (void)printf("-%s", name1[val % 10]); 259 } 260 rval = 1; 261 } 262 break; 263 case 1: 264 if (*p != '0') { 265 rval = 1; 266 (void)printf("%s", name1[*p - '0']); 267 } 268 } 269 return (rval); 270 } 271 272 void 273 pfract(len) 274 int len; 275 { 276 static const char *const pref[] = { "", "ten-", "hundred-" }; 277 278 switch(len) { 279 case 1: 280 (void)printf("tenths.\n"); 281 break; 282 case 2: 283 (void)printf("hundredths.\n"); 284 break; 285 default: 286 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 287 break; 288 } 289 } 290 291 void 292 usage() 293 { 294 (void)fprintf(stderr, "usage: number [# ...]\n"); 295 exit(1); 296 } 297