C++ (Cpp) NData::Clear Examples

Example #1

File: NFileUtilities.cpp Project: refnum/nano

//============================================================================
//		NFileUtilities::GetFileData : Get a file as data.
//----------------------------------------------------------------------------
NData NFileUtilities::GetFileData(const NFile &theFile)
{	uint64_t		theSize, numRead;
	NFile			mutableFile;
	NData			theData;
	NStatus			theErr;



	// Get the state we need
	mutableFile = theFile;
	theSize     = mutableFile.GetSize();
	NN_ASSERT( ((int64_t) theSize) <= kInt32Max);



	// Resize the buffer
	if (!theData.SetSize((NIndex) theSize))
		return(theData);



	// Open the file
	theErr = mutableFile.Open();
	if (theErr != kNoErr)
		{
		theData.Clear();
		return(theData);
		}



	// Read the data
	theErr = mutableFile.Read(theSize, theData.GetData(), numRead);
	theData.SetSize((NIndex) numRead);

	NN_ASSERT_NOERR(theErr);
	NN_ASSERT(numRead == theSize);
	NN_ASSERT(((int64_t) numRead) <= kInt32Max);



	// Clean up
	mutableFile.Close();

	return(theData);
}