mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
3265324e00
This change fixes #496 where ASAN spotted a race condition that could happen in multithreaded programs, with more than OPEN_MAX descriptors when using ZipOS or Windows NT, which require tracking open file info and this change fixes that table so it never relocates, thus allowing us to continue to enjoy the benefits of avoiding locks while reading.
125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ $OpenBSD: ecvt.c,v 1.11 2019/01/25 00:19:25 millert Exp $ │
|
|
│ │
|
|
│ Copyright (c) 2002, 2006 Todd C. Miller <millert@openbsd.org> │
|
|
│ │
|
|
│ Permission to use, copy, modify, and distribute this software for any │
|
|
│ purpose with or without fee is hereby granted, provided that the above │
|
|
│ copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES │
|
|
│ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF │
|
|
│ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR │
|
|
│ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES │
|
|
│ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN │
|
|
│ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF │
|
|
│ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. │
|
|
│ │
|
|
│ Sponsored in part by the Defense Advanced Research Projects │
|
|
│ Agency (DARPA) and Air Force Research Laboratory, Air Force │
|
|
│ Materiel Command, USAF, under agreement number F39502-99-1-0512. │
|
|
│ SUCH DAMAGE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/fmt/fmt.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/str/str.h"
|
|
#include "third_party/gdtoa/gdtoa.h"
|
|
|
|
asm(".ident\t\"\\n\\n\
|
|
OpenBSD ecvt/gcvt (MIT)\\n\
|
|
Copyright (c) 2002, 2006, 2010 Todd C. Miller <millert@openbsd.org>\"");
|
|
asm(".include \"libc/disclaimer.inc\"");
|
|
// clang-format off
|
|
|
|
static char *s;
|
|
|
|
static void
|
|
__cvt_atexit(void)
|
|
{
|
|
free(s);
|
|
s = 0;
|
|
}
|
|
|
|
static void __attribute__((__constructor__))
|
|
__cvt_init(void)
|
|
{
|
|
atexit(__cvt_atexit);
|
|
}
|
|
|
|
static char *
|
|
__cvt(double value, int ndigit, int *decpt, int *sign, int fmode, int pad)
|
|
{
|
|
char *p, *rve, c;
|
|
size_t siz;
|
|
|
|
if (ndigit == 0) {
|
|
*sign = value < 0.0;
|
|
*decpt = 0;
|
|
return ("");
|
|
}
|
|
|
|
free(s);
|
|
s = NULL;
|
|
|
|
if (ndigit < 0)
|
|
siz = -ndigit + 1;
|
|
else
|
|
siz = ndigit + 1;
|
|
|
|
|
|
/* __dtoa() doesn't allocate space for 0 so we do it by hand */
|
|
if (value == 0.0) {
|
|
*decpt = 1 - fmode; /* 1 for 'e', 0 for 'f' */
|
|
*sign = 0;
|
|
if ((rve = s = malloc(siz)) == NULL)
|
|
return(NULL);
|
|
*rve++ = '0';
|
|
*rve = '\0';
|
|
} else {
|
|
p = dtoa(value, fmode + 2, ndigit, decpt, sign, &rve);
|
|
if (p == NULL)
|
|
return (NULL);
|
|
if (*decpt == 9999) {
|
|
/* Infinity or Nan, convert to inf or nan like printf */
|
|
*decpt = 0;
|
|
c = *p;
|
|
freedtoa(p);
|
|
return(c == 'I' ? "inf" : "nan");
|
|
}
|
|
/* Make a local copy and adjust rve to be in terms of s */
|
|
if (pad && fmode)
|
|
siz += *decpt;
|
|
if ((s = malloc(siz)) == NULL) {
|
|
freedtoa(p);
|
|
return(NULL);
|
|
}
|
|
(void) strlcpy(s, p, siz);
|
|
rve = s + (rve - p);
|
|
freedtoa(p);
|
|
}
|
|
|
|
/* Add trailing zeros */
|
|
if (pad) {
|
|
siz -= rve - s;
|
|
while (--siz)
|
|
*rve++ = '0';
|
|
*rve = '\0';
|
|
}
|
|
|
|
return(s);
|
|
}
|
|
|
|
char *
|
|
ecvt(double value, int ndigit, int *decpt, int *sign)
|
|
{
|
|
return(__cvt(value, ndigit, decpt, sign, 0, 1));
|
|
}
|
|
|
|
char *
|
|
fcvt(double value, int ndigit, int *decpt, int *sign)
|
|
{
|
|
return(__cvt(value, ndigit, decpt, sign, 1, 1));
|
|
}
|