private string GuessMagicInfo(Stream fileStream, MagicOpenFlags flag)
{
using var reader = new StreamReader(fileStream);
var magic = new Magic(flag);
var bufferSize = reader.BaseStream.Length >= 1024 ? 1024 : (int)reader.BaseStream.Length;
return(magic.Read(reader.BaseStream, bufferSize));
}
public void SetFlags(MagicOpenFlags flags)
{
ThrowIfDisposed();
if (MagicNative.magic_setflags(_magic, flags) < 0)
{
throw new MagicException("Utime/Utimes not supported.");
}
}
public Magic(MagicOpenFlags flags, string dbPath = null)
{
_magic = MagicNative.magic_open(flags);
if (_magic == IntPtr.Zero)
{
throw new MagicException("Cannot create magic cookie.");
}
if (MagicNative.magic_load(_magic, dbPath) != 0)
{
throw new MagicException(LastError);
}
}
public Magic(MagicOpenFlags flags, string dbPath = null)
{
_magic = MagicNative.magic_open(flags);
if (_magic == IntPtr.Zero)
{
throw new Exception("Failed to initialize file type detection library: " + LastError);
}
if (MagicNative.magic_load(_magic, dbPath) != 0)
{
throw new Exception("File type detection database not found: " + LastError);
}
}
public Magic(MagicOpenFlags flags, string dbPath = null)
{
_magic = MagicNative.magic_open(flags);
if (_magic == IntPtr.Zero)
{
throw new MagicException(LastError, "Cannot create magic cookie.");
}
if (dbPath == null)
{
dbPath = MagicUtils.GetDefaultMagicPath();
}
if (MagicNative.magic_load(_magic, dbPath) != 0)
{
throw new MagicException(LastError, "Cannot load magic database file.");
}
}
public static extern IntPtr magic_open(MagicOpenFlags flags);
public static extern int magic_setflags(IntPtr magic_cookie, MagicOpenFlags flags);
internal static extern IntPtr magic_open(MagicOpenFlags flags);
