void
Data::wireDecode(const Blob& input, WireFormat& wireFormat)
{
size_t signedPortionBeginOffset, signedPortionEndOffset;
wireFormat.decodeData(*this, input.buf(), input.size(), &signedPortionBeginOffset, &signedPortionEndOffset);
if (&wireFormat == WireFormat::getDefaultWireFormat())
// This is the default wire encoding.
// Take a pointer to the input Blob without copying.
setDefaultWireEncoding
(SignedBlob(input, signedPortionBeginOffset, signedPortionEndOffset),
WireFormat::getDefaultWireFormat());
else
setDefaultWireEncoding(SignedBlob(), 0);
}
/**
* Return a reference to the defaultWireEncoding, which was encoded with
* getDefaultWireEncodingFormat(). The SignedBlob may have a null pointer.
*/
const SignedBlob&
getDefaultWireEncoding() const
{
if (getDefaultWireEncodingChangeCount_ != getChangeCount()) {
// The values have changed, so the default wire encoding is invalidated.
// This method can be called on a const object, but we want to be able to update the default cached value.
const_cast<Data*>(this)->defaultWireEncoding_ = SignedBlob();
const_cast<Data*>(this)->defaultWireEncodingFormat_ = 0;
const_cast<Data*>(this)->getDefaultWireEncodingChangeCount_ = getChangeCount();
}
return defaultWireEncoding_;
}
SignedBlob
Data::wireEncode(WireFormat& wireFormat) const
{
if (getDefaultWireEncoding() && getDefaultWireEncodingFormat() == &wireFormat)
// We already have an encoding in the desired format.
return getDefaultWireEncoding();
size_t signedPortionBeginOffset, signedPortionEndOffset;
Blob encoding = wireFormat.encodeData(*this, &signedPortionBeginOffset, &signedPortionEndOffset);
SignedBlob wireEncoding = SignedBlob(encoding, signedPortionBeginOffset, signedPortionEndOffset);
if (&wireFormat == WireFormat::getDefaultWireFormat())
// This is the default wire encoding.
const_cast<Data*>(this)->setDefaultWireEncoding
(wireEncoding, WireFormat::getDefaultWireFormat());
return wireEncoding;
}
