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-rw-r--r--net/openbgpd/files/patch-openbsd-compat_fmt_scaled.c275
1 files changed, 275 insertions, 0 deletions
diff --git a/net/openbgpd/files/patch-openbsd-compat_fmt_scaled.c b/net/openbgpd/files/patch-openbsd-compat_fmt_scaled.c
new file mode 100644
index 000000000000..65407211cbc8
--- /dev/null
+++ b/net/openbgpd/files/patch-openbsd-compat_fmt_scaled.c
@@ -0,0 +1,275 @@
+Index: openbsd-compat/fmt_scaled.c
+===================================================================
+RCS file: openbsd-compat/fmt_scaled.c
+diff -N openbsd-compat/fmt_scaled.c
+--- /dev/null 1 Jan 1970 00:00:00 -0000
++++ openbsd-compat/fmt_scaled.c 30 Jun 2009 06:40:07 -0000 1.1
+@@ -0,0 +1,268 @@
++/* $OpenBSD: fmt_scaled.c,v 1.9 2007/03/20 03:42:52 tedu Exp $ */
++
++/*
++ * Copyright (c) 2001, 2002, 2003 Ian F. Darwin. All rights reserved.
++ *
++ * 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. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
++ */
++
++/*
++ * fmt_scaled: Format numbers scaled for human comprehension
++ * scan_scaled: Scan numbers in this format.
++ *
++ * "Human-readable" output uses 4 digits max, and puts a unit suffix at
++ * the end. Makes output compact and easy-to-read esp. on huge disks.
++ * Formatting code was originally in OpenBSD "df", converted to library routine.
++ * Scanning code written for OpenBSD libutil.
++ */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <errno.h>
++#include <string.h>
++#include <ctype.h>
++#include <limits.h>
++
++#include "util.h"
++
++typedef enum {
++ NONE = 0, KILO = 1, MEGA = 2, GIGA = 3, TERA = 4, PETA = 5, EXA = 6
++} unit_type;
++
++/* These three arrays MUST be in sync! XXX make a struct */
++static unit_type units[] = { NONE, KILO, MEGA, GIGA, TERA, PETA, EXA };
++static char scale_chars[] = "BKMGTPE";
++static long long scale_factors[] = {
++ 1LL,
++ 1024LL,
++ 1024LL*1024,
++ 1024LL*1024*1024,
++ 1024LL*1024*1024*1024,
++ 1024LL*1024*1024*1024*1024,
++ 1024LL*1024*1024*1024*1024*1024,
++};
++#define SCALE_LENGTH (sizeof(units)/sizeof(units[0]))
++
++#define MAX_DIGITS (SCALE_LENGTH * 3) /* XXX strlen(sprintf("%lld", -1)? */
++
++/** Convert the given input string "scaled" into numeric in "result".
++ * Return 0 on success, -1 and errno set on error.
++ */
++int
++scan_scaled(char *scaled, long long *result)
++{
++ char *p = scaled;
++ int sign = 0;
++ unsigned int i, ndigits = 0, fract_digits = 0;
++ long long scale_fact = 1, whole = 0, fpart = 0;
++
++ /* Skip leading whitespace */
++ while (isascii(*p) && isspace(*p))
++ ++p;
++
++ /* Then at most one leading + or - */
++ while (*p == '-' || *p == '+') {
++ if (*p == '-') {
++ if (sign) {
++ errno = EINVAL;
++ return -1;
++ }
++ sign = -1;
++ ++p;
++ } else if (*p == '+') {
++ if (sign) {
++ errno = EINVAL;
++ return -1;
++ }
++ sign = +1;
++ ++p;
++ }
++ }
++
++ /* Main loop: Scan digits, find decimal point, if present.
++ * We don't allow exponentials, so no scientific notation
++ * (but note that E for Exa might look like e to some!).
++ * Advance 'p' to end, to get scale factor.
++ */
++ for (; isascii(*p) && (isdigit(*p) || *p=='.'); ++p) {
++ if (*p == '.') {
++ if (fract_digits > 0) { /* oops, more than one '.' */
++ errno = EINVAL;
++ return -1;
++ }
++ fract_digits = 1;
++ continue;
++ }
++
++ i = (*p) - '0'; /* whew! finally a digit we can use */
++ if (fract_digits > 0) {
++ if (fract_digits >= MAX_DIGITS-1)
++ /* ignore extra fractional digits */
++ continue;
++ fract_digits++; /* for later scaling */
++ fpart *= 10;
++ fpart += i;
++ } else { /* normal digit */
++ if (++ndigits >= MAX_DIGITS) {
++ errno = ERANGE;
++ return -1;
++ }
++ whole *= 10;
++ whole += i;
++ }
++ }
++
++ if (sign) {
++ whole *= sign;
++ fpart *= sign;
++ }
++
++ /* If no scale factor given, we're done. fraction is discarded. */
++ if (!*p) {
++ *result = whole;
++ return 0;
++ }
++
++ /* Validate scale factor, and scale whole and fraction by it. */
++ for (i = 0; i < SCALE_LENGTH; i++) {
++
++ /** Are we there yet? */
++ if (*p == scale_chars[i] ||
++ *p == tolower(scale_chars[i])) {
++
++ /* If it ends with alphanumerics after the scale char, bad. */
++ if (isalnum(*(p+1))) {
++ errno = EINVAL;
++ return -1;
++ }
++ scale_fact = scale_factors[i];
++
++ /* scale whole part */
++ whole *= scale_fact;
++
++ /* truncate fpart so it does't overflow.
++ * then scale fractional part.
++ */
++ while (fpart >= LLONG_MAX / scale_fact) {
++ fpart /= 10;
++ fract_digits--;
++ }
++ fpart *= scale_fact;
++ if (fract_digits > 0) {
++ for (i = 0; i < fract_digits -1; i++)
++ fpart /= 10;
++ }
++ whole += fpart;
++ *result = whole;
++ return 0;
++ }
++ }
++ errno = ERANGE;
++ return -1;
++}
++
++/* Format the given "number" into human-readable form in "result".
++ * Result must point to an allocated buffer of length FMT_SCALED_STRSIZE.
++ * Return 0 on success, -1 and errno set if error.
++ */
++int
++fmt_scaled(long long number, char *result)
++{
++ long long abval, fract = 0;
++ unsigned int i;
++ unit_type unit = NONE;
++
++ abval = (number < 0LL) ? -number : number; /* no long long_abs yet */
++
++ /* Not every negative long long has a positive representation.
++ * Also check for numbers that are just too darned big to format
++ */
++ if (abval < 0 || abval / 1024 >= scale_factors[SCALE_LENGTH-1]) {
++ errno = ERANGE;
++ return -1;
++ }
++
++ /* scale whole part; get unscaled fraction */
++ for (i = 0; i < SCALE_LENGTH; i++) {
++ if (abval/1024 < scale_factors[i]) {
++ unit = units[i];
++ fract = (i == 0) ? 0 : abval % scale_factors[i];
++ number /= scale_factors[i];
++ if (i > 0)
++ fract /= scale_factors[i - 1];
++ break;
++ }
++ }
++
++ fract = (10 * fract + 512) / 1024;
++ /* if the result would be >= 10, round main number */
++ if (fract == 10) {
++ if (number >= 0)
++ number++;
++ else
++ number--;
++ fract = 0;
++ }
++
++ if (number == 0)
++ strlcpy(result, "0B", FMT_SCALED_STRSIZE);
++ else if (unit == NONE || number >= 100 || number <= -100) {
++ if (fract >= 5) {
++ if (number >= 0)
++ number++;
++ else
++ number--;
++ }
++ (void)snprintf(result, FMT_SCALED_STRSIZE, "%lld%c",
++ number, scale_chars[unit]);
++ } else
++ (void)snprintf(result, FMT_SCALED_STRSIZE, "%lld.%1lld%c",
++ number, fract, scale_chars[unit]);
++
++ return 0;
++}
++
++#ifdef MAIN
++/*
++ * This is the original version of the program in the man page.
++ * Copy-and-paste whatever you need from it.
++ */
++int
++main(int argc, char **argv)
++{
++ char *cinput = "1.5K", buf[FMT_SCALED_STRSIZE];
++ long long ninput = 10483892, result;
++
++ if (scan_scaled(cinput, &result) == 0)
++ printf("\"%s\" -> %lld\n", cinput, result);
++ else
++ perror(cinput);
++
++ if (fmt_scaled(ninput, buf) == 0)
++ printf("%lld -> \"%s\"\n", ninput, buf);
++ else
++ fprintf(stderr, "%lld invalid (%s)\n", ninput, strerror(errno));
++
++ return 0;
++}
++#endif
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