/// <summary>
/// Build a MappedFile object. The file is open in sharing.
/// </summary>
/// <param name="path">Path to the file</param>
public MappedFile(string path)
{
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
len = (int)f.Length;
fm = new FileMap(f);
f.Close(); // Not needed anymore: the handle has been duplicated
mv = new MapView(fm, 0, len);
start = mv.GetPointer();
}
/// <summary>
/// Builds a mapped view of a mapped file.
/// </summary>
/// <param name="m">File mapping to use</param>
/// <param name="off">Offset to be mapped</param>
/// <param name="sz">Size of the view</param>
public MapView(FileMap m, long off, int sz)
{
long basep = off & Win32Mapping.MaskOffset;
int gap = (int)(off & Win32Mapping.MaskBase);
unsafe {
addr = (byte *)Win32Mapping.MapViewOfFile(m.Handle,
FileMapAccess.FILE_MAP_READ, (int)(basep >> 32),
(int)(basep & 0xFFFFFFFFL), sz);
pb = addr + gap;
size = sz;
}
}
