public override IBinaryDocumentMemoryBlock OpenBinaryDocument(IBinaryDocument sourceDocument)
{
try
{
return(base.OpenBinaryDocument(sourceDocument));
}
catch (TypeLoadException)
{
return(ManagedBinaryMemoryBlock.CreateManagedBinaryMemoryBlock(sourceDocument.Location, sourceDocument));
}
}
/// <summary>
/// Factory method for opening the memory mapped file. The content of the map is assumed to come from localFileName.
/// This can throw FileLoadException in case of error.
/// </summary>
/// <param name="localFileName"></param>
/// <param name="binaryDocument"></param>
/// <returns></returns>
public static ManagedBinaryMemoryBlock CreateManagedBinaryMemoryBlock(
string localFileName,
IBinaryDocument binaryDocument
)
{
using (FileStream stream = new FileStream(localFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
if (stream.Length != binaryDocument.Length)
{
throw new IOException("File size difference: " + localFileName);
}
if (stream.Length > Int32.MaxValue)
{
throw new IOException("File too Big: " + localFileName);
}
ManagedBinaryMemoryBlock managedBinaryMemoryBlock = new ManagedBinaryMemoryBlock(binaryDocument);
byte *pMainBuffer = (byte *)managedBinaryMemoryBlock._pointer;
//Read a fixed length block at a time, so that the GC does not come under pressure from lots of large byte arrays.
int fileRemainingLen = (int)binaryDocument.Length;
int copyBufferLen = 8096;
byte[] tempBuffer = new byte[copyBufferLen];
fixed(byte *tempBufferPtr = tempBuffer)
{
while (fileRemainingLen > 0)
{
if (fileRemainingLen < copyBufferLen)
{
copyBufferLen = fileRemainingLen;
}
stream.Read(tempBuffer, 0, copyBufferLen);
byte *iterBuffer = tempBufferPtr;
byte *endBuffer = tempBufferPtr + copyBufferLen;
while (iterBuffer < endBuffer)
{
*pMainBuffer++ = *iterBuffer++;
}
fileRemainingLen -= copyBufferLen;
}
}
return(managedBinaryMemoryBlock);
}
}
/// <summary>
/// Factory method for opening the memory mapped file. The content of the map is assumed to come from localFileName.
/// This can throw FileLoadException in case of error.
/// </summary>
/// <param name="localFileName"></param>
/// <param name="binaryDocument"></param>
/// <returns></returns>
public static ManagedBinaryMemoryBlock CreateManagedBinaryMemoryBlock(
string localFileName,
IBinaryDocument binaryDocument
)
{
using (FileStream stream = new FileStream(localFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
if (stream.Length != binaryDocument.Length)
throw new IOException("File size difference: " + localFileName);
if (stream.Length > Int32.MaxValue)
throw new IOException("File too Big: " + localFileName);
ManagedBinaryMemoryBlock managedBinaryMemoryBlock = new ManagedBinaryMemoryBlock(binaryDocument);
byte* pMainBuffer = (byte*)managedBinaryMemoryBlock._pointer;
//Read a fixed length block at a time, so that the GC does not come under pressure from lots of large byte arrays.
int fileRemainingLen = (int)binaryDocument.Length;
int copyBufferLen = 8096;
byte[] tempBuffer = new byte[copyBufferLen];
fixed (byte* tempBufferPtr = tempBuffer)
{
while (fileRemainingLen > 0)
{
if (fileRemainingLen < copyBufferLen)
{
copyBufferLen = fileRemainingLen;
}
stream.Read(tempBuffer, 0, copyBufferLen);
byte* iterBuffer = tempBufferPtr;
byte* endBuffer = tempBufferPtr + copyBufferLen;
while (iterBuffer < endBuffer)
{
*pMainBuffer++ = *iterBuffer++;
}
fileRemainingLen -= copyBufferLen;
}
}
return managedBinaryMemoryBlock;
}
}
