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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1988, 1993, 1994\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #define MAXNUM 65 /* Biggest number we handle. */ 54 55 static const char *name1[] = { 56 "", "one", "two", "three", 57 "four", "five", "six", "seven", 58 "eight", "nine", "ten", "eleven", 59 "twelve", "thirteen", "fourteen", "fifteen", 60 "sixteen", "seventeen", "eighteen", "nineteen", 61 }, 62 *name2[] = { 63 "", "ten", "twenty", "thirty", 64 "forty", "fifty", "sixty", "seventy", 65 "eighty", "ninety", 66 }, 67 *name3[] = { 68 "hundred", "thousand", "million", "billion", 69 "trillion", "quadrillion", "quintillion", "sextillion", 70 "septillion", "octillion", "nonillion", "decillion", 71 "undecillion", "duodecillion", "tredecillion", "quattuordecillion", 72 "quindecillion", "sexdecillion", 73 "septendecillion", "octodecillion", 74 "novemdecillion", "vigintillion", 75 }; 76 77 static void convert(char *); 78 static int number(char *, int); 79 static void pfract(int); 80 static int unit(int, char *); 81 static void usage(void); 82 83 static int lflag; 84 85 int 86 main(int argc, char *argv[]) 87 { 88 int ch, first; 89 char line[256]; 90 91 lflag = 0; 92 while ((ch = getopt(argc, argv, "l")) != -1) 93 switch (ch) { 94 case 'l': 95 lflag = 1; 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 argc -= optind; 102 argv += optind; 103 104 if (*argv == NULL) 105 for (first = 1; 106 fgets(line, sizeof(line), stdin) != NULL; first = 0) { 107 if (strchr(line, '\n') == NULL) 108 errx(1, "line too long."); 109 if (!first) 110 (void)printf("...\n"); 111 convert(line); 112 } 113 else 114 for (first = 1; *argv != NULL; first = 0, ++argv) { 115 if (!first) 116 (void)printf("...\n"); 117 convert(*argv); 118 } 119 exit(0); 120 } 121 122 static void 123 convert(char *line) 124 { 125 int flen, len, rval; 126 char *p, *fraction; 127 128 flen = 0; 129 fraction = NULL; 130 for (p = line; *p != '\0' && *p != '\n'; ++p) { 131 if (isblank(*p)) { 132 if (p == line) { 133 ++line; 134 continue; 135 } 136 goto badnum; 137 } 138 if (isdigit(*p)) 139 continue; 140 switch (*p) { 141 case '.': 142 if (fraction != NULL) 143 goto badnum; 144 fraction = p + 1; 145 *p = '\0'; 146 break; 147 case '-': 148 if (p == line) 149 break; 150 /* FALLTHROUGH */ 151 default: 152 badnum: errx(1, "illegal number: %s", line); 153 break; 154 } 155 } 156 *p = '\0'; 157 158 if ((len = strlen(line)) > MAXNUM || 159 (fraction != NULL && ((flen = strlen(fraction)) > MAXNUM))) 160 errx(1, "number too large, max %d digits.", MAXNUM); 161 162 if (*line == '-') { 163 (void)printf("minus%s", lflag ? " " : "\n"); 164 ++line; 165 --len; 166 } 167 168 rval = len > 0 ? unit(len, line) : 0; 169 if (fraction != NULL && flen != 0) 170 for (p = fraction; *p != '\0'; ++p) 171 if (*p != '0') { 172 if (rval) 173 (void)printf("%sand%s", 174 lflag ? " " : "", 175 lflag ? " " : "\n"); 176 if (unit(flen, fraction)) { 177 if (lflag) 178 (void)printf(" "); 179 pfract(flen); 180 rval = 1; 181 } 182 break; 183 } 184 if (!rval) 185 (void)printf("zero%s", lflag ? "" : ".\n"); 186 if (lflag) 187 (void)printf("\n"); 188 } 189 190 static int 191 unit(int len, char *p) 192 { 193 int off, rval; 194 195 rval = 0; 196 if (len > 3) { 197 if (len % 3) { 198 off = len % 3; 199 len -= off; 200 if (number(p, off)) { 201 rval = 1; 202 (void)printf(" %s%s", 203 name3[len / 3], lflag ? " " : ".\n"); 204 } 205 p += off; 206 } 207 for (; len > 3; p += 3) { 208 len -= 3; 209 if (number(p, 3)) { 210 rval = 1; 211 (void)printf(" %s%s", 212 name3[len / 3], lflag ? " " : ".\n"); 213 } 214 } 215 } 216 if (number(p, len)) { 217 if (!lflag) 218 (void)printf(".\n"); 219 rval = 1; 220 } 221 return (rval); 222 } 223 224 static int 225 number(char *p, int len) 226 { 227 int val, rval; 228 229 rval = 0; 230 switch (len) { 231 case 3: 232 if (*p != '0') { 233 rval = 1; 234 (void)printf("%s hundred", name1[*p - '0']); 235 } 236 ++p; 237 /* FALLTHROUGH */ 238 case 2: 239 val = (p[1] - '0') + (p[0] - '0') * 10; 240 if (val) { 241 if (rval) 242 (void)printf(" "); 243 if (val < 20) 244 (void)printf("%s", name1[val]); 245 else { 246 (void)printf("%s", name2[val / 10]); 247 if (val % 10) 248 (void)printf("-%s", name1[val % 10]); 249 } 250 rval = 1; 251 } 252 break; 253 case 1: 254 if (*p != '0') { 255 rval = 1; 256 (void)printf("%s", name1[*p - '0']); 257 } 258 } 259 return (rval); 260 } 261 262 static void 263 pfract(int len) 264 { 265 static char const * const pref[] = { "", "ten-", "hundred-" }; 266 267 switch(len) { 268 case 1: 269 (void)printf("tenths.\n"); 270 break; 271 case 2: 272 (void)printf("hundredths.\n"); 273 break; 274 default: 275 (void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]); 276 break; 277 } 278 } 279 280 static void 281 usage(void) 282 { 283 (void)fprintf(stderr, "usage: number [-l] [# ...]\n"); 284 exit(1); 285 } 286