1 files changed, 106 insertions, 0 deletions
diff --git a/Examples/go/goin/example.i b/Examples/go/goin/example.i
new file mode 100644
index 000000000..b819b8089
--- /dev/null
+++ b/Examples/go/goin/example.i
@@ -0,0 +1,106 @@
+
+%module(directors="1") example
+
+%inline %{
+// Helper functions for converting string arrays
+#include <stdlib.h>
+void *alloc_ptr_array(unsigned int len)
+{
+    return calloc(len, sizeof(void *));
+}
+void set_ptr_array(void *ain, unsigned int pos, void *val)
+{
+    void **a = (void **) ain;
+    a[pos] = val;
+}
+void *get_ptr_array(void *ain, unsigned int pos)
+{
+    void **a = (void **) ain;
+    return a[pos];
+}
+void free_ptr_array(void *ain)
+{
+    void **a = (void **) ain;
+    unsigned int i;
+
+    if (!a)
+        return;
+    for (i = 0; a[i]; i++) {
+        free(a[i]);
+    }
+    free(a);
+}
+char *uintptr_to_string(void *in)
+{
+    return (char *) in;
+}
+void *string_to_uintptr(char *in)
+{
+    return strdup(in);
+}
+%}
+
+// These typemaps convert between an array of strings in Go and a
+// const char** that is NULL terminated in C++.
+%typemap(gotype) (const char * const *) "[]string"
+%typemap(imtype) (const char * const *) "uintptr"
+%typemap(goin) (const char * const *) {
+	if $input == nil || len($input) == 0 {
+		$result = 0
+	} else {
+		$result = Alloc_ptr_array(uint(len($input) + 1))
+		defer func() {
+			Free_ptr_array($result)
+		}()
+		var i uint
+		for i = 0; i < uint(len($input)); i++ {
+			Set_ptr_array($result, i, String_to_uintptr($input[i]))
+		}
+	}
+}
+%typemap(in) (const char * const *) {
+    $1 = (char **) $input;
+}
+%typemap(godirectorin) (const char * const *) {
+	if ($input == 0) {
+		$result = nil
+	} else {
+		var i uint
+		for i = 0; ; i++ {
+			var v uintptr = Get_ptr_array($input, i)
+			if v == 0 {
+				break
+			}
+		}
+		if i == 0 {
+			$result = nil
+		} else {
+			$result = make([]string, i)
+			for i = 0; ; i++ {
+				var v uintptr = Get_ptr_array($input, i)
+				if v == 0 {
+					break
+				}
+				$result[i] = Uintptr_to_string(v)
+			}
+		}
+	}
+}
+
+%feature("director") callbacks;
+
+%inline %{
+    class callbacks {
+    public:
+	virtual bool call1(int v, const char * const *strarray);
+	virtual ~callbacks() {}
+    };
+
+    bool check1(callbacks *c, int v, const char * const *strarray) {
+	return c->call1(v, strarray);
+    }
+
+    bool callbacks::call1(int v, const char * const *strarray) {
+        return false;
+    }
+%}