Adds identity activation subclass

setup.py

@@ -53,6 +53,7 @@ setup(
       Extension("xbob.machine._library",
         [
           "xbob/machine/activation.cpp",
+          "xbob/machine/identity.cpp",
           "xbob/machine/main.cpp",
           ],
         packages = packages,

xbob/machine/identity.cpp

+/**
+ * @author Andre Anjos <andre.anjos@idiap.ch>
+ * @date Mon 13 Jan 2014 17:25:32 CET
+ *
+ * @brief Implementation of the Identity Activation function
+ */
+
+#include <xbob.machine/api.h>
+
+PyDoc_STRVAR(s_activationsubtype_str, XBOB_EXT_MODULE_PREFIX ".IdentityActivation");
+
+PyDoc_STRVAR(s_activationsubtype_doc,
+"IdentityActivation() -> new IdentityActivation\n\
+\n\
+Computes :math:`f(z) = z` as activation function.\n\
+\n\
+");
+
+/* Type definition for PyBobMathLpInteriorPointObject */
+typedef struct {
+  PyBobMachineActivationObject parent;
+
+  /* Type-specific fields go here. */
+  bob::machine::IdentityActivation* base;
+
+} PyBobMachineActivationSubtypeObject;
+
+static int PyBobMachineActivationSubtype_init(PyBobMachineActivationSubtypeObject* self, PyObject* args, PyObject* kwds) {
+
+  /* Parses input arguments in a single shot */
+  static const char* const_kwlist[] = {0};
+  static char** kwlist = const_cast<char**>(const_kwlist);
+
+  if (!PyArg_ParseTupleAndKeywords(args, kwds, "", kwlist)) return -1;
+
+  try {
+    self->base = new bob::machine::IdentityActivation();
+  }
+  catch (std::exception& ex) {
+    PyErr_SetString(PyExc_RuntimeError, ex.what());
+  }
+  catch (...) {
+    PyErr_Format(PyExc_RuntimeError, "cannot create new object of type `%s' - unknown exception thrown", s_activationsubtype_str);
+  }
+
+  self->parent.base = self->base;
+
+  if (PyErr_Occurred()) return -1;
+
+  return 0;
+
+}
+
+static void PyBobMachineActivationSubtype_delete (PyBobMachineActivationSubtypeObject* self) {
+
+  delete self->base;
+  self->parent.base = 0;
+  self->base = 0;
+  self->parent.ob_type->tp_free((PyObject*)self);
+
+}
+
+PyTypeObject PyBobMachineActivationSubtype_Type = {
+    PyObject_HEAD_INIT(0)
+    0,                                                  /*ob_size*/
+    0,                                                  /*tp_name*/
+    sizeof(PyBobMachineActivationSubtypeObject),        /*tp_basicsize*/
+    0,                                                  /*tp_itemsize*/
+    (destructor)PyBobMachineActivationSubtype_delete,   /*tp_dealloc*/
+    0,                                                  /*tp_print*/
+    0,                                                  /*tp_getattr*/
+    0,                                                  /*tp_setattr*/
+    0,                                                  /*tp_compare*/
+    0,                                                  /*tp_repr*/
+    0,                                                  /*tp_as_number*/
+    0,                                                  /*tp_as_sequence*/
+    0,                                                  /*tp_as_mapping*/
+    0,                                                  /*tp_hash */
+    0,                                                  /*tp_call*/
+    0,                                                  /*tp_str*/
+    0,                                                  /*tp_getattro*/
+    0,                                                  /*tp_setattro*/
+    0,                                                  /*tp_as_buffer*/
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,           /*tp_flags*/
+    s_activationsubtype_doc,                            /* tp_doc */
+    0,		                                              /* tp_traverse */
+    0,		                                              /* tp_clear */
+    0,                                                  /* tp_richcompare */
+    0,		                                              /* tp_weaklistoffset */
+    0,		                                              /* tp_iter */
+    0,		                                              /* tp_iternext */
+    0,                                                  /* tp_methods */
+    0,                                                  /* tp_members */
+    0,                                                  /* tp_getset */
+    0,                                                  /* tp_base */
+    0,                                                  /* tp_dict */
+    0,                                                  /* tp_descr_get */
+    0,                                                  /* tp_descr_set */
+    0,                                                  /* tp_dictoffset */
+    (initproc)PyBobMachineActivationSubtype_init,       /* tp_init */
+    0,                                                  /* tp_alloc */
+    0,                                                  /* tp_new */
+};