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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#define _CRT_RAND_S
#include <stdlib.h>
#include <memory.h>
int osl_get_system_random_data(char* buffer, size_t desired_len)
{
unsigned int val;
/* if unaligned fill to alignment */
if((int)buffer & 3)
{
size_t len = 4 - ((size_t)(buffer) & 3);
if(len > desired_len)
{
len = desired_len;
}
if(rand_s(&val))
{
return 0;
}
memcpy(buffer, &val, len);
buffer += len;
desired_len -= len;
}
/* fill directly into the buffer as long as we can */
while(desired_len >= 4)
{
if(rand_s((unsigned int*)buffer))
{
return 0;
}
else
{
buffer += 4;
desired_len -= 4;
}
}
/* deal with the partial int reminder to fill */
if(desired_len)
{
if(rand_s(&val))
{
return 0;
}
memcpy(buffer, &val, desired_len);
}
return 1;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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