add initial mono bindings

git-svn-id: file:///home/lennart/svn/public/avahi/trunk@538 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

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;
+        }
+    }
+}