/* Legal Notice: Some portions of the source code contained in this file were derived from the source code of TrueCrypt 7.1a, which is Copyright (c) 2003-2012 TrueCrypt Developers Association and which is governed by the TrueCrypt License 3.0, also from the source code of Encryption for the Masses 2.02a, which is Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License Agreement for Encryption for the Masses' Modifications and additions to the original source code (contained in this file) and all other portions of this file are Copyright (c) 2013-2017 IDRIX and are governed by the Apache License 2.0 the full text of which is contained in the file License.txt included in VeraCrypt binary and source code distribution packages. */ #ifndef TC_HEADER_CRC #define TC_HEADER_CRC #include "Tcdefs.h" #if defined(__cplusplus) extern "C" { #endif #define UPDC32(octet, crc)\ (unsigned __int32)((crc_32_tab[(((unsigned __int32)(crc)) ^ ((unsigned char)(octet))) & 0xff] ^ (((unsigned __int32)(crc)) >> 8))) unsigned __int32 GetCrc32 (unsigned char *data, int length); unsigned __int32 crc32int (unsigned __int32 *data); BOOL crc32_selftests (void); extern unsigned __int32 crc_32_tab[]; #if defined(__cplusplus) } #endif #endif // TC_HEADER_CRC ttps://sourceforge.net/p/veracrypt/discussion/" target="_blank">Forums
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path: root/src/Platform/MemoryStream.cpp
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/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2016 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "Exception.h"
#include "MemoryStream.h"

namespace VeraCrypt
{
	MemoryStream::MemoryStream (const ConstBufferPtr &data) :
		ReadPosition (0)
	{
		Data = vector <byte> (data.Size());
		BufferPtr (&Data[0], Data.size()).CopyFrom (data);
	}

	uint64 MemoryStream::Read (const BufferPtr &buffer)
	{
		if (Data.size() == 0)
			throw ParameterIncorrect (SRC_POS);

		ConstBufferPtr streamBuf (*this);
		size_t len = buffer.Size();
		if (streamBuf.Size() - ReadPosition < len)
			len = streamBuf.Size() - ReadPosition;

		BufferPtr(buffer).CopyFrom (streamBuf.GetRange (ReadPosition, len));
		ReadPosition += len;
		return len;
	}

	void MemoryStream::ReadCompleteBuffer (const BufferPtr &buffer)
	{
		if (Read (buffer) != buffer.Size())
			throw InsufficientData (SRC_POS);
	}

	void MemoryStream::Write (const ConstBufferPtr &data)
	{
		for (uint64 i = 0; i < data.Size(); i++)
			Data.push_back (data[i]);
	}
}