diff options
Diffstat (limited to 'avahi-sharp/Utility.cs')
-rw-r--r-- | avahi-sharp/Utility.cs | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/avahi-sharp/Utility.cs b/avahi-sharp/Utility.cs new file mode 100644 index 0000000..c621bed --- /dev/null +++ b/avahi-sharp/Utility.cs @@ -0,0 +1,70 @@ +using System; +using System.Net; +using System.Text; +using System.Runtime.InteropServices; +using Mono.Unix; + + +namespace Avahi +{ + internal class Utility + { + [DllImport ("libc")] + private static extern int strlen (IntPtr ptr); + + [DllImport ("avahi-common")] + private static extern IntPtr avahi_address_snprint (IntPtr buf, int size, IntPtr address); + + public static string PtrToString (IntPtr ptr) + { + if (ptr == IntPtr.Zero) + return null; + + int len = strlen (ptr); + byte[] bytes = new byte[len]; + Marshal.Copy (ptr, bytes, 0, len); + return Encoding.UTF8.GetString (bytes); + } + + public static string PtrToStringFree (IntPtr ptr) + { + if (ptr == IntPtr.Zero) + return null; + + string ret = PtrToString (ptr); + Free (ptr); + return ret; + } + + public static IntPtr StringToPtr (string str) + { + if (str == null) + return IntPtr.Zero; + + byte[] bytes = Encoding.UTF8.GetBytes (str); + IntPtr buf = Stdlib.malloc ((uint) bytes.Length + 1); + Marshal.Copy (bytes, 0, buf, bytes.Length); + Marshal.WriteByte (buf, bytes.Length, 0); + return buf; + } + + public static void Free (IntPtr ptr) + { + Stdlib.free (ptr); + } + + public static IPAddress PtrToAddress (IntPtr ptr) + { + IPAddress address = null; + + if (ptr != IntPtr.Zero) { + IntPtr buf = Stdlib.malloc (256); + IntPtr addrPtr = avahi_address_snprint (buf, 256, ptr); + address = IPAddress.Parse (Utility.PtrToString (addrPtr)); + Utility.Free (addrPtr); + } + + return address; + } + } +} |