1 files changed, 123 insertions, 0 deletions
diff --git a/python/exception.c b/python/exception.c
new file mode 100644
index 0000000..2edc722
--- /dev/null
+++ b/python/exception.c
@@ -0,0 +1,123 @@
+/*------------------------------------------------------------------------
+ *  Copyright 2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+ *
+ *  This file is part of the ZBar Bar Code Reader.
+ *
+ *  The ZBar Bar Code Reader is free software; you can redistribute it
+ *  and/or modify it under the terms of the GNU Lesser Public License as
+ *  published by the Free Software Foundation; either version 2.1 of
+ *  the License, or (at your option) any later version.
+ *
+ *  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser Public License
+ *  along with the ZBar Bar Code Reader; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ *  Boston, MA  02110-1301  USA
+ *
+ *  http://sourceforge.net/projects/zbar
+ *------------------------------------------------------------------------*/
+
+#include "zbarmodule.h"
+
+#if PY_MAJOR_VERSION < 3
+
+static inline PyObject *exc_get_message(zbarException *self, void *closure)
+{
+    PyBaseExceptionObject *super = (PyBaseExceptionObject *)self;
+    if (!PyString_Size(super->message)) {
+	Py_CLEAR(super->message);
+	if (!self->obj || !zbarProcessor_Check(self->obj))
+	    super->message = PyString_FromString("unknown zbar error");
+	else {
+	    const void *zobj = ((zbarProcessor *)self->obj)->zproc;
+	    super->message   = PyString_FromString(_zbar_error_string(zobj, 1));
+	}
+    }
+    Py_INCREF(super->message);
+    return (super->message);
+}
+
+static int exc_init(zbarException *self, PyObject *args, PyObject *kwds)
+{
+    if (!_PyArg_NoKeywords(self->base.ob_type->tp_name, kwds))
+	return (-1);
+    PyBaseExceptionObject *super = (PyBaseExceptionObject *)self;
+    Py_CLEAR(super->args);
+    Py_INCREF(args);
+    super->args = args;
+
+    if (PyTuple_GET_SIZE(args) == 1) {
+	Py_CLEAR(self->obj);
+	self->obj = PyTuple_GET_ITEM(args, 0);
+	Py_INCREF(self->obj);
+    }
+    return (0);
+}
+
+static int exc_traverse(zbarException *self, visitproc visit, void *arg)
+{
+    Py_VISIT(self->obj);
+    PyTypeObject *base = (PyTypeObject *)PyExc_Exception;
+    return (base->tp_traverse((PyObject *)self, visit, arg));
+}
+
+static int exc_clear(zbarException *self)
+{
+    Py_CLEAR(self->obj);
+    ((PyTypeObject *)PyExc_Exception)->tp_clear((PyObject *)self);
+    return (0);
+}
+
+static void exc_dealloc(zbarException *self)
+{
+    exc_clear(self);
+    ((PyTypeObject *)PyExc_Exception)->tp_dealloc((PyObject *)self);
+}
+
+static PyObject *exc_str(zbarException *self)
+{
+    return (exc_get_message(self, NULL));
+}
+
+static int exc_set_message(zbarException *self, PyObject *value, void *closure)
+{
+    PyBaseExceptionObject *super = (PyBaseExceptionObject *)self;
+    Py_CLEAR(super->message);
+    if (!value)
+	value = PyString_FromString("");
+    else
+	Py_INCREF(value);
+    super->message = value;
+    return (0);
+}
+
+static PyGetSetDef exc_getset[] = {
+    {
+	"message",
+	(getter)exc_get_message,
+	(setter)exc_set_message,
+    },
+    {
+	NULL,
+    },
+};
+
+PyTypeObject zbarException_Type = {
+    PyVarObject_HEAD_INIT(NULL, 0).tp_name = "zbar.Exception",
+
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
+
+    .tp_basicsize = sizeof(zbarException),
+    .tp_init	  = (initproc)exc_init,
+    .tp_traverse  = (traverseproc)exc_traverse,
+    .tp_clear	  = (inquiry)exc_clear,
+    .tp_dealloc	  = (destructor)exc_dealloc,
+    .tp_str	  = (reprfunc)exc_str,
+    .tp_getset	  = exc_getset,
+};
+
+#endif