1 files changed, 63 insertions, 0 deletions
diff --git a/Lib/csharp/swiginterface.i b/Lib/csharp/swiginterface.i
new file mode 100644
index 000000000..96e2b1d39
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+++ b/Lib/csharp/swiginterface.i
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+/* -----------------------------------------------------------------------------
+ * swiginterface.i
+ *
+ * SWIG interface feature and typemaps implementation providing:
+ *   %interface
+ *   %interface_impl
+ *   %interface_custom
+ * ----------------------------------------------------------------------------- */
+
+%define INTERFACE_TYPEMAPS(CTYPE...)
+%typemap(cstype) CTYPE "$&csinterfacename"
+%typemap(cstype) CTYPE *, CTYPE [], CTYPE & "$csinterfacename"
+%typemap(cstype) CTYPE *const& "$*csinterfacename"
+%typemap(csin) CTYPE, CTYPE & "$csinput.GetInterfaceCPtr()"
+%typemap(csin) CTYPE *, CTYPE *const&, CTYPE [] "$csinput == null ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : $csinput.GetInterfaceCPtr()"
+%typemap(csout, excode=SWIGEXCODE) CTYPE {
+    $&csclassname ret = new $&csclassname($imcall, true);$excode
+    return ($&csinterfacename)ret;
+  }
+%typemap(csout, excode=SWIGEXCODE) CTYPE & {
+    $csclassname ret = new $csclassname($imcall, $owner);$excode
+    return ($csinterfacename)ret;
+  }
+%typemap(csout, excode=SWIGEXCODE) CTYPE *, CTYPE [] {
+    global::System.IntPtr cPtr = $imcall;
+    $csclassname ret = (cPtr == global::System.IntPtr.Zero) ? null : new $csclassname(cPtr, $owner);$excode
+    return ($csinterfacename)ret;
+  }
+%typemap(csout, excode=SWIGEXCODE) CTYPE *const& {
+    global::System.IntPtr cPtr = $imcall;
+    $*csclassname ret = (cPtr == global::System.IntPtr.Zero) ? null : new $*csclassname(cPtr, $owner);$excode
+    return ($*csinterfacename)ret;
+  }
+%typemap(csdirectorin) CTYPE "($&csinterfacename)new $&csclassname($iminput, false)"
+%typemap(csdirectorin) CTYPE & "($csinterfacename)new $csclassname($iminput, false)"
+%typemap(csdirectorin) CTYPE *, CTYPE [] "($iminput == global::System.IntPtr.Zero) ? null : ($csinterfacename)new $csclassname($iminput, false)"
+%typemap(csdirectorin) CTYPE *const& "($iminput == global::System.IntPtr.Zero) ? null : ($*csinterfacename)new $*csclassname($iminput, false)"
+%typemap(csdirectorout) CTYPE, CTYPE *, CTYPE *const&, CTYPE [], CTYPE & "$cscall.GetInterfaceCPtr()"
+%typemap(csinterfacecode, declaration="  [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]\n  global::System.Runtime.InteropServices.HandleRef GetInterfaceCPtr();\n", cptrmethod="$interfacename_GetInterfaceCPtr") CTYPE %{
+  [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+  global::System.Runtime.InteropServices.HandleRef $interfacename.GetInterfaceCPtr() {
+    return new global::System.Runtime.InteropServices.HandleRef(this, $imclassname.$csclazzname$interfacename_GetInterfaceCPtr(swigCPtr.Handle));
+  }
+%}
+%enddef
+
+%define %interface(CTYPE...)
+%feature("interface", name="I%s") CTYPE;
+INTERFACE_TYPEMAPS(CTYPE)
+%enddef
+
+%define %interface_impl(CTYPE...)
+%rename("%sSwigImpl") CTYPE;
+%feature("interface", name="%(rstrip:[SwigImpl])s") CTYPE;
+INTERFACE_TYPEMAPS(CTYPE)
+%enddef
+
+%define %interface_custom(IMPL, INTERFACE, CTYPE...)
+%rename(IMPL) CTYPE;
+%feature("interface", name=INTERFACE) CTYPE;
+INTERFACE_TYPEMAPS(CTYPE)
+%enddef
+