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/*
This file is part of libmicrohttpd
Copyright (C) 2014 Karlson2k (Evgeny Grin)
This 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.
This 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 this library.
If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file platform/w32functions.h
* @brief internal functions for W32 systems
* @author Karlson2k (Evgeny Grin)
*/
#include "w32functions.h"
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <stdio.h>
#include <stdarg.h>
/**
* Static variable used by pseudo random number generator
*/
static int32_t rnd_val = 0;
/**
* Generate 31-bit pseudo random number.
* Function initialize itself at first call to current time.
* @return 31-bit pseudo random number.
*/
int MHD_W32_random_(void)
{
if (0 == rnd_val)
rnd_val = (int32_t)time(NULL);
/* stolen from winsup\cygwin\random.cc */
rnd_val = (16807 * (rnd_val % 127773) - 2836 * (rnd_val / 127773))
& 0x7fffffff;
return (int)rnd_val;
}
/* Emulate snprintf function on W32 */
int W32_snprintf(char *__restrict s, size_t n, const char *__restrict format, ...)
{
int ret;
va_list args;
if (0 != n && NULL != s )
{
va_start(args, format);
ret = _vsnprintf(s, n, format, args);
va_end(args);
if ((int)n == ret)
s[n - 1] = 0;
if (ret >= 0)
return ret;
}
va_start(args, format);
ret = _vscprintf(format, args);
va_end(args);
if (0 <= ret && 0 != n && NULL == s)
return -1;
return ret;
}
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