filestream.h

使用visual studio 2005 开发的开源文件、磁盘加密软件。这是6.1a版。加密自己资料的好工具。也是学习的优秀范本。结成了众多加密算法。

/*
 Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.

 Governed by the TrueCrypt License 2.6 the full text of which is contained
 in the file License.txt included in TrueCrypt binary and source code
 distribution packages.
*/

#ifndef TC_HEADER_Platform_FileStream
#define TC_HEADER_Platform_FileStream

#include "PlatformBase.h"
#include "File.h"
#include "SharedPtr.h"
#include "Stream.h"

namespace TrueCrypt
{
	class FileStream : public Stream
	{
	public:
		FileStream (shared_ptr <File> file) : DataFile (file) { }
		FileStream (File::SystemFileHandleType openFileHandle) { DataFile.reset (new File ()); DataFile->AssignSystemHandle (openFileHandle); }
		virtual ~FileStream () { }

		virtual uint64 Read (const BufferPtr &buffer)
		{
			return DataFile->Read (buffer);
		}

		virtual void ReadCompleteBuffer (const BufferPtr &buffer)
		{
			DataFile->ReadCompleteBuffer (buffer);
		}

		virtual string ReadToEnd ()
		{
			string str;
			vector <char> buffer (4096);
			uint64 len;

			while ((len = DataFile->Read (BufferPtr (reinterpret_cast <byte *> (&buffer[0]), buffer.size()))) > 0)
				str.insert (str.end(), buffer.begin(), buffer.begin() + static_cast <int> (len));

			return str;
		}

		virtual void Write (const ConstBufferPtr &data)
		{
			DataFile->Write (data);
		}

	protected:
		shared_ptr <File> DataFile;
	};
}

#endif // TC_HEADER_Platform_FileStream