288 lines
6.4 KiB
C
288 lines
6.4 KiB
C
/* $NetBSD: number.c,v 1.15 2012/06/19 05:46:09 dholland Exp $ */
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/*
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)number.c 8.3 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: number.c,v 1.15 2012/06/19 05:46:09 dholland Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define MAXNUM 65 /* Biggest number we handle. */
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static const char *const name1[] = {
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"", "one", "two", "three",
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"four", "five", "six", "seven",
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"eight", "nine", "ten", "eleven",
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"twelve", "thirteen", "fourteen", "fifteen",
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"sixteen", "seventeen", "eighteen", "nineteen",
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},
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*const name2[] = {
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"", "ten", "twenty", "thirty",
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"forty", "fifty", "sixty", "seventy",
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"eighty", "ninety",
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},
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*const name3[] = {
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"hundred", "thousand", "million", "billion",
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"trillion", "quadrillion", "quintillion", "sextillion",
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"septillion", "octillion", "nonillion", "decillion",
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"undecillion", "duodecillion", "tredecillion", "quattuordecillion",
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"quindecillion", "sexdecillion",
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"septendecillion", "octodecillion",
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"novemdecillion", "vigintillion",
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};
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int main(int, char *[]);
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static void convert(char *);
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static int number(const char *, int);
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static void pfract(int);
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static int unit(int, const char *);
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static void usage(void) __dead;
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static int lflag;
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int
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main(int argc, char *argv[])
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{
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int ch, first;
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char line[256];
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lflag = 0;
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while ((ch = getopt(argc, argv, "l")) != -1)
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switch (ch) {
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case 'l':
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lflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (*argv == NULL)
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for (first = 1;
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fgets(line, sizeof(line), stdin) != NULL; first = 0) {
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if (strchr(line, '\n') == NULL)
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errx(1, "line too long.");
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if (!first)
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(void)printf("...\n");
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convert(line);
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}
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else
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for (first = 1; *argv != NULL; first = 0, ++argv) {
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if (!first)
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(void)printf("...\n");
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convert(*argv);
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}
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exit(0);
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}
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void
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convert(char *line)
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{
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int flen, len, rval;
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char *p, *fraction;
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flen = 0;
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fraction = NULL;
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for (p = line; *p != '\0' && *p != '\n'; ++p) {
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if (isblank((unsigned char)*p)) {
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if (p == line) {
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++line;
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continue;
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}
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goto badnum;
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}
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if (isdigit((unsigned char)*p))
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continue;
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switch (*p) {
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case '.':
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if (fraction != NULL)
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goto badnum;
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fraction = p + 1;
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*p = '\0';
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break;
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case '-':
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if (p == line)
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break;
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/* FALLTHROUGH */
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default:
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badnum: errx(1, "illegal number: %s", line);
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break;
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}
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}
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*p = '\0';
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if ((len = strlen(line)) > MAXNUM ||
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(fraction != NULL && (flen = strlen(fraction)) > MAXNUM))
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errx(1, "number too large, max %d digits.", MAXNUM);
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if (*line == '-') {
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(void)printf("minus%s", lflag ? " " : "\n");
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++line;
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--len;
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}
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rval = len > 0 ? unit(len, line) : 0;
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if (fraction != NULL && flen != 0)
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for (p = fraction; *p != '\0'; ++p)
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if (*p != '0') {
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if (rval)
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(void)printf("%sand%s",
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lflag ? " " : "",
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lflag ? " " : "\n");
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if (unit(flen, fraction)) {
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if (lflag)
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(void)printf(" ");
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pfract(flen);
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rval = 1;
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}
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break;
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}
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if (!rval)
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(void)printf("zero%s", lflag ? "" : ".\n");
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if (lflag)
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(void)printf("\n");
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}
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int
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unit(int len, const char *p)
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{
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int off, rval;
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rval = 0;
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if (len > 3) {
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if (len % 3) {
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off = len % 3;
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len -= off;
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if (number(p, off)) {
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rval = 1;
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(void)printf(" %s%s",
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name3[len / 3], lflag ? " " : ".\n");
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}
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p += off;
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}
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for (; len > 3; p += 3) {
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len -= 3;
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if (number(p, 3)) {
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rval = 1;
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(void)printf(" %s%s",
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name3[len / 3], lflag ? " " : ".\n");
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}
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}
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}
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if (number(p, len)) {
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if (!lflag)
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(void)printf(".\n");
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rval = 1;
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}
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return (rval);
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}
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int
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number(const char *p, int len)
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{
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int val, rval;
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rval = 0;
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switch (len) {
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case 3:
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if (*p != '0') {
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rval = 1;
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(void)printf("%s hundred", name1[*p - '0']);
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}
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++p;
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/* FALLTHROUGH */
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case 2:
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val = (p[1] - '0') + (p[0] - '0') * 10;
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if (val) {
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if (rval)
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(void)printf(" ");
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if (val < 20)
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(void)printf("%s", name1[val]);
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else {
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(void)printf("%s", name2[val / 10]);
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if (val % 10)
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(void)printf("-%s", name1[val % 10]);
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}
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rval = 1;
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}
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break;
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case 1:
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if (*p != '0') {
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rval = 1;
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(void)printf("%s", name1[*p - '0']);
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}
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}
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return (rval);
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}
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void
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pfract(int len)
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{
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static const char *const pref[] = { "", "ten-", "hundred-" };
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switch(len) {
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case 1:
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(void)printf("tenths.\n");
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break;
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case 2:
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(void)printf("hundredths.\n");
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break;
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default:
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(void)printf("%s%sths.\n", pref[len % 3], name3[len / 3]);
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break;
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}
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}
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void
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usage(void)
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{
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(void)fprintf(stderr, "usage: number [# ...]\n");
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exit(1);
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}
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