Merge branch 'master' into squeeze

[debian/amanda] / perl / amglue / objwrap.c

diff --git a/perl/amglue/objwrap.c b/perl/amglue/objwrap.c
new file mode 100644 (file)
index 0000000..29e95f2
--- /dev/null
+++ b/perl/amglue/objwrap.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2009 Zmanda, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ * Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
+ * Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
+ */
+
+/* Functions to wrap arbitrary C objects into perl, with a blessing.  These
+ * functions are used when we totally skip SWIG's object-wrapping and build
+ * our own Perl methods to wrap a class -- currently only in AManda::Xfer.
+ */
+
+#include "amglue.h"
+
+SV *
+new_sv_for_c_obj(
+    gpointer c_obj,
+    const char *perl_class)
+{
+    SV *sv = newSV(0);
+
+    /* Make an SV that contains a pointer to the object, and bless it
+     * with the appropriate class. */
+    sv_setref_pv(sv, perl_class, c_obj);
+
+    return sv;
+}
+
+gpointer
+c_obj_from_sv(
+    SV *sv,
+    const char *derived_from)
+{
+    SV *referent;
+    IV tmp;
+
+    if (!sv) return NULL;
+    if (!SvOK(sv)) return NULL;
+
+    /* Peel back the layers.  The sv should be a blessed reference to a PV,
+     * and we check the class against derived_from to ensure we have the right
+     * stuff. */
+    if (!sv_isobject(sv) || !sv_derived_from(sv, derived_from)) {
+       croak("Value is not an object of type %s", derived_from);
+       return NULL;
+    }
+
+    referent = (SV *)SvRV(sv);
+    tmp = SvIV(referent);
+    return INT2PTR(gpointer, tmp);
+}
+