void MemoryStream::Write(ByteArray& buffer, int32 offset, int32 count)
{
if(buffer.IsNull())
throw ArgumentNullException(L"buffer");
if (offset < 0 || count < 0)
throw ArgumentOutOfRangeException ();
if((int32)buffer.Length() - offset < count)
throw ArgumentException(L"offset+count", L"The size of the buffer is less than offset + count.");
CheckIfClosedThrowDisposed ();
if(!CanWrite())
throw NotSupportedException(L"Cannot write to this stream.");
// reordered to avoid possible integer overflow
if(_position > _length - count)
Expand(_position + count);
Buffer::BlockCopy(buffer, offset, (*_internalBuffer), _position, count);
_position += count;
if(_position >= _length)
_length = _position;
}
int Convert::ToBase64CharArray(ByteArray& inArray, int offsetIn, int length, CharArray& outArray, int offsetOut)
{
using namespace Security;
if(inArray.IsNull())
throw ArgumentNullException(L"inArray");
if (outArray.IsNull())
throw ArgumentNullException(L"outArray");
if(offsetIn < 0 || length < 0 || offsetOut < 0)
throw ArgumentOutOfRangeException(L"offsetIn, length, offsetOut < 0");
// avoid integer overflow
if(offsetIn > (int)inArray.Length() - length)
throw ArgumentOutOfRangeException(L"offsetIn + length > array.Length");
// note: normally ToBase64Transform doesn't support multiple block processing
ByteArray outArr = Cryptography::Base64Helper::TransformFinalBlock(inArray, offsetIn, length);
Text::ASCIIEncoding enc;
CharArray cOutArr = enc.GetChars(outArr);
// avoid integer overflow
if(offsetOut > (int)(outArray.Length() - cOutArr.Length()) )
throw ArgumentOutOfRangeException(L"offsetOut + cOutArr.Length > outArray.Length");
outArray.Base(offsetOut);
for(int32 i = 0; i < (int32)cOutArr.Length(); ++i)
outArray[i] = cOutArr[i];
outArray.Base(0);
return (int)cOutArr.Length();
}
// Check whether the other ByteArray is equal to this.
bool ByteArray::Equal(const ByteArray &other) const {
if (Length() != other.Length()) {
return false;
}
if (Length() == 0 && other.Length() == 0) {
// If both are empty, ensure that they are either
// both null, or both non-null.
return IsNull() == other.IsNull();
}
if (memcmp(ConstData(), other.ConstData(), Length()) == 0) {
return true;
}
return false;
}
int MemoryStream::Read(ByteArray& buffer, int offset, int count)
{
if(buffer.IsNull())
throw ArgumentNullException(L"buffer");
if(offset < 0 || count < 0)
throw ArgumentOutOfRangeException(L"offset or count less than zero.");
if((int32)buffer.Length() - offset < count )
throw ArgumentException (L"offset+count", L"The size of the buffer is less than offset + count.");
CheckIfClosedThrowDisposed ();
if(_position >= _length || count == 0)
return 0;
if(_position > _length - count)
count = _length - _position;
Buffer::BlockCopy((*_internalBuffer), _position, buffer, offset, count);
_position += count;
return count;
}
