mirror of
https://github.com/FirebirdSQL/firebird.git
synced 2025-01-27 06:43:04 +01:00
60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
/*
|
|
* The contents of this file are subject to the Initial
|
|
* Developer's Public License Version 1.0 (the "License");
|
|
* you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
|
|
*
|
|
* Software distributed under the License is distributed AS IS,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing rights
|
|
* and limitations under the License.
|
|
*
|
|
* The Original Code was created by Adriano dos Santos Fernandes
|
|
* for the Firebird Open Source RDBMS project.
|
|
*
|
|
* Copyright (c) 2007 Adriano dos Santos Fernandes <adrianosf@uol.com.br>
|
|
* and all contributors signed below.
|
|
*
|
|
* All Rights Reserved.
|
|
* Contributor(s): ______________________________________.
|
|
*/
|
|
|
|
#include "firebird.h"
|
|
#include "common.h"
|
|
#include "../jrd/RandomGenerator.h"
|
|
#include "../jrd/os/guid.h"
|
|
|
|
|
|
namespace Jrd {
|
|
|
|
RandomGenerator::RandomGenerator()
|
|
: bufferPos(BUFFER_SIZE)
|
|
{
|
|
}
|
|
|
|
|
|
void RandomGenerator::getBytes(void* p, size_t size)
|
|
{
|
|
while (size > 0)
|
|
{
|
|
const size_t size2 = MIN(size, BUFFER_SIZE);
|
|
|
|
if (bufferPos + size2 > BUFFER_SIZE)
|
|
{
|
|
if (bufferPos < BUFFER_SIZE)
|
|
memmove(buffer, buffer + bufferPos, BUFFER_SIZE - bufferPos);
|
|
GenerateRandomBytes(buffer + (BUFFER_SIZE - bufferPos), bufferPos);
|
|
bufferPos = 0;
|
|
}
|
|
|
|
memcpy(p, buffer + bufferPos, size2);
|
|
p = ((char*) p) + size2;
|
|
bufferPos += size2;
|
|
size -= size2;
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|