private object EnsureSuffixArray(string filename, byte[] image)
{
var fsSvc = Services.RequireService <IFileSystemService>();
var diagSvc = Services.RequireService <IDiagnosticsService>();
Stream?stm = null;
try
{
if (fsSvc.FileExists(filename))
{
stm = fsSvc.CreateFileStream(filename, FileMode.Open, FileAccess.Read);
try
{
var sSuffix = (int[])new UbjsonReader(stm).Read() !;
return(SuffixArray.Load(image, sSuffix));
}
catch (Exception ex)
{
diagSvc.Warn("Unable to load suffix array {0}. {1}", filename, ex.Message);
} finally
{
stm.Close();
}
}
var sa = SuffixArray.Create(image);
stm = fsSvc.CreateFileStream(filename, FileMode.Create, FileAccess.Write);
new UbjsonWriter(stm).Write(sa.Save());
return(sa);
}
finally
{
if (stm != null)
{
stm.Dispose();
}
}
}
