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Member "src/Platform/MemoryStream.cpp" (10 Oct 2018, 1416 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:

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    1 /*
    2  Derived from source code of TrueCrypt 7.1a, which is
    3  Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
    4  by the TrueCrypt License 3.0.
    5 
    6  Modifications and additions to the original source code (contained in this file)
    7  and all other portions of this file are Copyright (c) 2013-2017 IDRIX
    8  and are governed by the Apache License 2.0 the full text of which is
    9  contained in the file License.txt included in VeraCrypt binary and source
   10  code distribution packages.
   11 */
   12 
   13 #include "Exception.h"
   14 #include "MemoryStream.h"
   15 
   16 namespace VeraCrypt
   17 {
   18     MemoryStream::MemoryStream (const ConstBufferPtr &data) :
   19         ReadPosition (0)
   20     {
   21         Data = vector <byte> (data.Size());
   22         BufferPtr (&Data[0], Data.size()).CopyFrom (data);
   23     }
   24 
   25     uint64 MemoryStream::Read (const BufferPtr &buffer)
   26     {
   27         if (Data.size() == 0)
   28             throw ParameterIncorrect (SRC_POS);
   29 
   30         ConstBufferPtr streamBuf (*this);
   31         size_t len = buffer.Size();
   32         if (streamBuf.Size() - ReadPosition < len)
   33             len = streamBuf.Size() - ReadPosition;
   34 
   35         BufferPtr(buffer).CopyFrom (streamBuf.GetRange (ReadPosition, len));
   36         ReadPosition += len;
   37         return len;
   38     }
   39 
   40     void MemoryStream::ReadCompleteBuffer (const BufferPtr &buffer)
   41     {
   42         if (Read (buffer) != buffer.Size())
   43             throw InsufficientData (SRC_POS);
   44     }
   45 
   46     void MemoryStream::Write (const ConstBufferPtr &data)
   47     {
   48         for (uint64 i = 0; i < data.Size(); i++)
   49             Data.push_back (data[i]);
   50     }
   51 }