/// <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 UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(
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);
}
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte *pMainBuffer = (byte *)unmanagedBinaryMemoryBlock._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(unmanagedBinaryMemoryBlock);
}
}
/// <summary>
/// Creates an unmanaged binary memory block and copies the contents of the given byte enumeration into the block.
/// </summary>
/// <param name="stream">A stream of bytes that are to be copied into the resulting memory block.</param>
/// <param name="binaryDocument">The binary document whose contents are stored in the given file.</param>
/// <exception cref="System.IO.IOException">The length of the stream is not the same as the length of the binary document, or the stream length is greater than Int32.MaxValue.</exception>
public static UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(IEnumerable <byte> stream, IBinaryDocument binaryDocument)
{
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte *pMainBuffer = (byte *)unmanagedBinaryMemoryBlock.Pointer;
byte *endOfBuffer = pMainBuffer + binaryDocument.Length;
foreach (var b in stream)
{
if (pMainBuffer == endOfBuffer)
{
throw new IOException("stream length != binaryDocument.Length: " + binaryDocument.Location);
}
*pMainBuffer++ = b;
}
if (pMainBuffer != endOfBuffer)
{
throw new IOException("stream length != binaryDocument.Length: " + binaryDocument.Location);
}
return(unmanagedBinaryMemoryBlock);
}
/// <summary>
/// Creates an unmanaged binary memory block and copies the contents of the given stream into the block.
/// </summary>
/// <param name="stream">A stream of bytes that are to be copied into the resulting memory block.</param>
/// <param name="binaryDocument">The binary document whose contents are stored in the given file.</param>
/// <exception cref="System.IO.IOException">The length of the stream is not the same as the length of the binary document, or the stream length is greater than Int32.MaxValue.</exception>
public static UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(Stream stream, IBinaryDocument binaryDocument)
{
if (stream.Length != binaryDocument.Length)
{
throw new IOException("stream.Length != binaryDocument.Length: " + binaryDocument.Location);
}
if (stream.Length > Int32.MaxValue)
{
throw new IOException("stream.Length > Int32.MaxValue: " + binaryDocument.Location);
}
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte *pMainBuffer = (byte *)unmanagedBinaryMemoryBlock.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 remainingLength = (int)binaryDocument.Length;
int copyBufferLength = 8096;
byte[] tempBuffer = new byte[copyBufferLength];
fixed(byte *tempBufferPtr = tempBuffer)
{
while (remainingLength > 0)
{
if (remainingLength < copyBufferLength)
{
copyBufferLength = remainingLength;
}
stream.Read(tempBuffer, 0, copyBufferLength);
byte *iterBuffer = tempBufferPtr;
byte *endBuffer = tempBufferPtr + copyBufferLength;
while (iterBuffer < endBuffer)
{
*pMainBuffer++ = *iterBuffer++;
}
remainingLength -= copyBufferLength;
}
}
return(unmanagedBinaryMemoryBlock);
}
/// <summary>
/// Creates an unmanaged binary memory block and copies the contents of the given stream into the block.
/// </summary>
/// <param name="stream">A stream of bytes that are to be copied into the resulting memory block.</param>
/// <param name="binaryDocument">The binary document whose contents are stored in the given file.</param>
/// <exception cref="System.IO.IOException">The length of the stream is not the same as the length of the binary document, or the stream length is greater than Int32.MaxValue.</exception>
public static UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(Stream stream, IBinaryDocument binaryDocument)
{
if (stream.Length != binaryDocument.Length)
throw new IOException("stream.Length != binaryDocument.Length: " + binaryDocument.Location);
if (stream.Length > Int32.MaxValue)
throw new IOException("stream.Length > Int32.MaxValue: " + binaryDocument.Location);
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte* pMainBuffer = (byte*)unmanagedBinaryMemoryBlock.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 remainingLength = (int)binaryDocument.Length;
int copyBufferLength = 8096;
byte[] tempBuffer = new byte[copyBufferLength];
fixed (byte* tempBufferPtr = tempBuffer) {
while (remainingLength > 0) {
if (remainingLength < copyBufferLength) {
copyBufferLength = remainingLength;
}
stream.Read(tempBuffer, 0, copyBufferLength);
byte* iterBuffer = tempBufferPtr;
byte* endBuffer = tempBufferPtr + copyBufferLength;
while (iterBuffer < endBuffer) {
*pMainBuffer++ = *iterBuffer++;
}
remainingLength -= copyBufferLength;
}
}
return unmanagedBinaryMemoryBlock;
}
/// <summary>
/// Creates an unmanaged binary memory block and copies the contents of the given byte enumeration into the block.
/// </summary>
/// <param name="stream">A stream of bytes that are to be copied into the resulting memory block.</param>
/// <param name="binaryDocument">The binary document whose contents are stored in the given file.</param>
/// <exception cref="System.IO.IOException">The length of the stream is not the same as the length of the binary document, or the stream length is greater than Int32.MaxValue.</exception>
public static UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(IEnumerable<byte> stream, IBinaryDocument binaryDocument) {
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte* pMainBuffer = (byte*)unmanagedBinaryMemoryBlock.Pointer;
byte* endOfBuffer = pMainBuffer + binaryDocument.Length;
foreach (var b in stream) {
if (pMainBuffer == endOfBuffer) throw new IOException("stream length != binaryDocument.Length: " + binaryDocument.Location);
*pMainBuffer++ = b;
}
if (pMainBuffer != endOfBuffer) throw new IOException("stream length != binaryDocument.Length: " + binaryDocument.Location);
return unmanagedBinaryMemoryBlock;
}
/// <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 UnmanagedBinaryMemoryBlock CreateUnmanagedBinaryMemoryBlock(
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);
UnmanagedBinaryMemoryBlock unmanagedBinaryMemoryBlock = new UnmanagedBinaryMemoryBlock(binaryDocument);
byte* pMainBuffer = (byte*)unmanagedBinaryMemoryBlock.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 unmanagedBinaryMemoryBlock;
}
}
