glibc/inet/inet_ntoa.c
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2018-01-01 00:32:25 +00:00

39 lines
1.3 KiB
C

/* Convert Inet number to ASCII representation.
Copyright (C) 1997-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
/* The interface of this function is completely stupid, it requires a
static buffer. We relax this a bit in that we allow one buffer for
each thread. */
static __thread char buffer[18];
char *
inet_ntoa (struct in_addr in)
{
unsigned char *bytes = (unsigned char *) &in;
__snprintf (buffer, sizeof (buffer), "%d.%d.%d.%d",
bytes[0], bytes[1], bytes[2], bytes[3]);
return buffer;
}