-/* $NetBSD: humanize_number.c,v 1.8 2004/07/27 01:56:24 enami Exp $ */
-
-/*
- * Copyright (c) 1997, 1998, 1999, 2002 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
- * NASA Ames Research Center, by Luke Mewburn and by Tomas Svensson.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <locale.h>
-#include <fts.h>
-
-#include "ls.h"
-
-int
-humanize_number(char *buf, size_t len, int64_t bytes,
- const char *suffix, int scale, int flags)
-{
- const char *prefixes, *sep;
- int b, i, r, maxscale, s1, s2, sign;
- int64_t divisor, max;
- size_t baselen;
-
- assert(buf != NULL);
- assert(suffix != NULL);
- assert(scale >= 0);
-
- if (flags & HN_DIVISOR_1000) {
- /* SI for decimal multiplies */
- divisor = 1000;
- if (flags & HN_B)
- prefixes = "B\0k\0M\0G\0T\0P\0E";
- else
- prefixes = "\0\0k\0M\0G\0T\0P\0E";
- } else {
- /*
- * binary multiplies
- * XXX IEC 60027-2 recommends Ki, Mi, Gi...
- */
- divisor = 1024;
- if (flags & HN_B)
- prefixes = "B\0K\0M\0G\0T\0P\0E";
- else
- prefixes = "\0\0K\0M\0G\0T\0P\0E";
- }
-
-#define SCALE2PREFIX(scale) (&prefixes[(scale) << 1])
- maxscale = 7;
-
- if (scale >= maxscale &&
- (scale & (HN_AUTOSCALE | HN_GETSCALE)) == 0)
- return (-1);
-
- if (buf == NULL || suffix == NULL)
- return (-1);
-
- if (len > 0)
- buf[0] = '\0';
- if (bytes < 0) {
- sign = -1;
- bytes *= -100;
- baselen = 3; /* sign, digit, prefix */
- } else {
- sign = 1;
- bytes *= 100;
- baselen = 2; /* digit, prefix */
- }
- if (flags & HN_NOSPACE)
- sep = "";
- else {
- sep = " ";
- baselen++;
- }
- baselen += strlen(suffix);
-
- /* Check if enough room for `x y' + suffix + `\0' */
- if (len < baselen + 1)
- return (-1);
-
- if (scale & (HN_AUTOSCALE | HN_GETSCALE)) {
- /* See if there is additional columns can be used. */
- for (max = 100, i = len - baselen; i-- > 0;)
- max *= 10;
-
- for (i = 0; bytes >= max && i < maxscale; i++)
- bytes /= divisor;
-
- if (scale & HN_GETSCALE)
- return (i);
- } else
- for (i = 0; i < scale && i < maxscale; i++)
- bytes /= divisor;
-
- /* If a value <= 9.9 after rounding and ... */
- if (bytes < 995 && i > 0 && flags & HN_DECIMAL) {
- /* baselen + \0 + .N */
- if (len < baselen + 1 + 2)
- return (-1);
- b = ((int)bytes + 5) / 10;
- s1 = b / 10;
- s2 = b % 10;
- r = snprintf(buf, len, "%d%s%d%s%s%s",
- sign * s1, localeconv()->decimal_point, s2,
- sep, SCALE2PREFIX(i), suffix);
- } else
- r = snprintf(buf, len, "%lld%s%s%s",
- /* LONGLONG */
- (long long)(sign * ((bytes + 50) / 100)),
- sep, SCALE2PREFIX(i), suffix);
-
- return (r);
-}
projects / apple / file_cmds.git / commitdiff
