From db5e37a1d7b80304a9c9875b01cfd585070a288a Mon Sep 17 00:00:00 2001
From: William S Fulton <wsf@fultondesigns.co.uk>
Date: Mon, 18 Jul 2022 08:32:26 +0100
Subject: Add support for std::auto_ptr inputs

Ported from std::unique, behaviour is identical with regard to memory ownership/handling
---
 Lib/java/std_auto_ptr.i | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

(limited to 'Lib/java')

diff --git a/Lib/java/std_auto_ptr.i b/Lib/java/std_auto_ptr.i
index 0eb5fe155..6d65f0451 100644
--- a/Lib/java/std_auto_ptr.i
+++ b/Lib/java/std_auto_ptr.i
@@ -1,29 +1,39 @@
 /* -----------------------------------------------------------------------------
  * std_auto_ptr.i
  *
- * The typemaps here allow handling functions returning std::auto_ptr<>,
- * which is the most common use of this type. If you have functions taking it
- * as parameter, these typemaps can't be used for them and you need to do
- * something else (e.g. use shared_ptr<> which SWIG supports fully).
+ * SWIG library file for handling std::auto_ptr.
+ * Memory ownership is passed from the std::auto_ptr C++ layer to the proxy
+ * class when returning a std::auto_ptr from a function.
+ * Memory ownership is passed from the proxy class to the std::auto_ptr in the
+ * C++ layer when passed as a parameter to a wrapped function.
  * ----------------------------------------------------------------------------- */
 
 %define %auto_ptr(TYPE)
+
 %typemap (jni) std::auto_ptr< TYPE > "jlong"
 %typemap (jtype) std::auto_ptr< TYPE > "long"
 %typemap (jstype) std::auto_ptr< TYPE > "$typemap(jstype, TYPE)"
 
+%typemap(in) std::auto_ptr< TYPE > (TYPE *auto_temp)
+%{ auto_temp = *(TYPE **)&$input;
+  $1.reset(auto_temp); %}
+
+%typemap(javain) std::auto_ptr< TYPE > "$typemap(jstype, TYPE).swigRelease($javainput)"
+
 %typemap (out) std::auto_ptr< TYPE > %{
-   jlong lpp = 0;
-   *(TYPE **) &lpp = $1.release();
-   $result = lpp;
+  jlong lpp = 0;
+  *(TYPE **) &lpp = $1.release();
+  $result = lpp;
 %}
+
 %typemap(javaout) std::auto_ptr< TYPE > {
-     long cPtr = $jnicall;
-     return (cPtr == 0) ? null : new $typemap(jstype, TYPE)(cPtr, true);
-   }
+    long cPtr = $jnicall;
+    return (cPtr == 0) ? null : new $typemap(jstype, TYPE)(cPtr, true);
+  }
+
 %template() std::auto_ptr< TYPE >;
 %enddef
 
 namespace std {
-   template <class T> class auto_ptr {};
-} 
+  template <class T> class auto_ptr {};
+}
-- 
cgit v1.2.1