/// <summary>
/// Opens the file for writing.
/// </summary>
/// <returns>The opened file.</returns>
/// <param name="Path">Path to the output file.</param>
/// <param name="Headers">FITS Headers to be written to the file.</param>
public static MMapFitsFile OpenWriteFile(string Path, HeaderTable Headers)
{
FileInfo info = new FileInfo(Path);
int HLength = ((Headers.Count * 80) + 2879) / 2880 * 2880;
int DLength = HeaderIO.ComputeDataArrayLength(Headers) + 2879;
DLength = DLength / 2880 * 2880;
int FLength = HLength + DLength;
MemoryMappedFile mmap = MemoryMappedFile.CreateFromFile(Path, FileMode.Create, Guid.NewGuid().ToString(), FLength, MemoryMappedFileAccess.ReadWrite);
Stream s = mmap.CreateViewStream();
FitsFileBuilder builder = new FitsFileBuilder()
{
PrimaryTable = new HeaderTable()
};
foreach (var w in Headers)
{
builder.PrimaryTable.Add(w.Key, w.Value); s.Write(((FITSMetadataRecord)w.Value).ToRawRecord(), 0, 80);
}
s.Write(Encoding.UTF8.GetBytes("END".PadRight(80)), 0, 80);
while (s.Position < HLength)
{
s.Write(Encoding.UTF8.GetBytes(string.Empty.PadRight(80)), 0, 80);
}
builder.PrimaryDataPointer = HLength;
s.Dispose();
return(new MMapFitsFile(Path, true, null, builder, mmap, MemoryMappedFileAccess.ReadWrite));
}
/// <summary>
/// Open file for reading.
/// </summary>
/// <returns>The opened file.</returns>
/// <param name="Path">Path to the file.</param>
/// <param name="numberGetter">Delegate that generates the image numbers in a MEF FITS.</param>
public static MMapFitsFile OpenReadFile(string Path, MEFImageNumberGetter numberGetter = null)
{
FileInfo info = new FileInfo(Path);
MemoryMappedFile mmap = MemoryMappedFile.CreateFromFile(Path, FileMode.Open, Guid.NewGuid().ToString(), 0, MemoryMappedFileAccess.Read);
Stream stream = mmap.CreateViewStream(0, 0, MemoryMappedFileAccess.Read);
FitsFileBuilder builder = HeaderIO.ReadFileHeaders(stream, info.Length, numberGetter);
stream.Dispose();
return(new MMapFitsFile(Path, false, numberGetter, builder, mmap, MemoryMappedFileAccess.Read));
}
/// <summary>
/// Opens a file from the given stream.
/// </summary>
/// <returns>The opened file.</returns>
/// <param name="str">Input stream.</param>
/// <param name="Length">Data length.</param>
/// <param name="Path">Path to the data.</param>
/// <param name="numberGetter">MEF naming policy.</param>
public static NSStreamFitsFile OpenFile(Stream str, int Length, string Path, MEFImageNumberGetter numberGetter = null)
{
byte[] Data = new byte[Length];
str.Read(Data, 0, Data.Length);
FitsFileBuilder Headers;
using (MemoryStream ms = new MemoryStream(Data))
Headers = HeaderIO.ReadFileHeaders(ms, Length, numberGetter);
return(new NSStreamFitsFile(Data, Path, false, numberGetter, Headers));
}
