mirror of
https://github.com/FirebirdSQL/firebird.git
synced 2025-02-01 00:43:03 +01:00
68 lines
1.6 KiB
C++
68 lines
1.6 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 Dmitry Yemanov
|
|
* for the Firebird Open Source RDBMS project.
|
|
*
|
|
* Copyright (c) 2006 Dmitry Yemanov <dimitr@users.sf.net>
|
|
* and all contributors signed below.
|
|
*
|
|
* All Rights Reserved.
|
|
* Contributor(s): ______________________________________.
|
|
*/
|
|
|
|
#ifndef CLASSES_FILE_H
|
|
#define CLASSES_FILE_H
|
|
|
|
#include "../common/classes/array.h"
|
|
|
|
#if !defined(SOLARIS) && !defined(AIX)
|
|
typedef FB_UINT64 offset_t;
|
|
#endif
|
|
|
|
namespace Firebird {
|
|
|
|
class File
|
|
{
|
|
public:
|
|
virtual ~File() {}
|
|
|
|
virtual size_t read(offset_t, void*, size_t) = 0;
|
|
virtual size_t write(offset_t, const void*, size_t) = 0;
|
|
|
|
virtual void unlink() = 0;
|
|
|
|
virtual offset_t getSize() const = 0;
|
|
};
|
|
|
|
class ZeroBuffer
|
|
{
|
|
static const size_t DEFAULT_SIZE = 1024 * 256;
|
|
|
|
public:
|
|
explicit ZeroBuffer(MemoryPool& p, size_t size = DEFAULT_SIZE)
|
|
: buffer(p)
|
|
{
|
|
memset(buffer.getBuffer(size), 0, size);
|
|
}
|
|
|
|
const char* getBuffer() const { return buffer.begin(); }
|
|
size_t getSize() const { return buffer.getCount(); }
|
|
|
|
private:
|
|
Firebird::Array<char> buffer;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
#endif // CLASSES_FILE_H
|