first commit based on psycopg2 2.9 version

psycopg/adapter_asis.c

@@ -0,0 +1,195 @@
+/* adapter_asis.c - adapt types as they are
+ *
+ * Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
+ * Copyright (C) 2020-2021 The Psycopg Team
+ *
+ * This file is part of psycopg.
+ *
+ * psycopg2 is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link this program with the OpenSSL library (or with
+ * modified versions of OpenSSL that use the same license as OpenSSL),
+ * and distribute linked combinations including the two.
+ *
+ * You must obey the GNU Lesser General Public License in all respects for
+ * all of the code used other than OpenSSL.
+ *
+ * psycopg2 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 General Public
+ * License for more details.
+ */
+
+#define PSYCOPG_MODULE
+#include "psycopg/psycopg.h"
+
+#include "psycopg/adapter_asis.h"
+#include "psycopg/microprotocols_proto.h"
+
+#include <string.h>
+
+
+/** the AsIs object **/
+
+static PyObject *
+asis_getquoted(asisObject *self, PyObject *args)
+{
+    PyObject *rv;
+    if (self->wrapped == Py_None) {
+        Py_INCREF(psyco_null);
+        rv = psyco_null;
+    }
+    else {
+        rv = PyObject_Str(self->wrapped);
+        /* unicode to bytes */
+        if (rv) {
+            PyObject *tmp = PyUnicode_AsUTF8String(rv);
+            Py_DECREF(rv);
+            rv = tmp;
+        }
+    }
+
+    return rv;
+}
+
+static PyObject *
+asis_str(asisObject *self)
+{
+    return psyco_ensure_text(asis_getquoted(self, NULL));
+}
+
+static PyObject *
+asis_conform(asisObject *self, PyObject *args)
+{
+    PyObject *res, *proto;
+
+    if (!PyArg_ParseTuple(args, "O", &proto)) return NULL;
+
+    if (proto == (PyObject*)&isqlquoteType)
+        res = (PyObject*)self;
+    else
+        res = Py_None;
+
+    Py_INCREF(res);
+    return res;
+}
+
+/** the AsIs object */
+
+/* object member list */
+
+static struct PyMemberDef asisObject_members[] = {
+    {"adapted", T_OBJECT, offsetof(asisObject, wrapped), READONLY},
+    {NULL}
+};
+
+/* object method table */
+
+static PyMethodDef asisObject_methods[] = {
+    {"getquoted", (PyCFunction)asis_getquoted, METH_NOARGS,
+     "getquoted() -> wrapped object value as SQL-quoted string"},
+    {"__conform__", (PyCFunction)asis_conform, METH_VARARGS, NULL},
+    {NULL}  /* Sentinel */
+};
+
+/* initialization and finalization methods */
+
+static int
+asis_setup(asisObject *self, PyObject *obj)
+{
+    Dprintf("asis_setup: init asis object at %p, refcnt = "
+        FORMAT_CODE_PY_SSIZE_T,
+        self, Py_REFCNT(self)
+      );
+
+    Py_INCREF(obj);
+    self->wrapped = obj;
+
+    Dprintf("asis_setup: good asis object at %p, refcnt = "
+        FORMAT_CODE_PY_SSIZE_T,
+        self, Py_REFCNT(self)
+      );
+    return 0;
+}
+
+static void
+asis_dealloc(PyObject* obj)
+{
+    asisObject *self = (asisObject *)obj;
+
+    Py_CLEAR(self->wrapped);
+
+    Dprintf("asis_dealloc: deleted asis object at %p, refcnt = "
+        FORMAT_CODE_PY_SSIZE_T,
+        obj, Py_REFCNT(obj)
+      );
+
+    Py_TYPE(obj)->tp_free(obj);
+}
+
+static int
+asis_init(PyObject *obj, PyObject *args, PyObject *kwds)
+{
+    PyObject *o;
+
+    if (!PyArg_ParseTuple(args, "O", &o))
+        return -1;
+
+    return asis_setup((asisObject *)obj, o);
+}
+
+static PyObject *
+asis_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+    return type->tp_alloc(type, 0);
+}
+
+
+/* object type */
+
+#define asisType_doc \
+"AsIs(str) -> new AsIs adapter object"
+
+PyTypeObject asisType = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "psycopg2.extensions.AsIs",
+    sizeof(asisObject), 0,
+    asis_dealloc, /*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*/
+    (reprfunc)asis_str, /*tp_str*/
+    0,          /*tp_getattro*/
+    0,          /*tp_setattro*/
+    0,          /*tp_as_buffer*/
+    Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+    asisType_doc, /*tp_doc*/
+    0,          /*tp_traverse*/
+    0,          /*tp_clear*/
+    0,          /*tp_richcompare*/
+    0,          /*tp_weaklistoffset*/
+    0,          /*tp_iter*/
+    0,          /*tp_iternext*/
+    asisObject_methods, /*tp_methods*/
+    asisObject_members, /*tp_members*/
+    0,          /*tp_getset*/
+    0,          /*tp_base*/
+    0,          /*tp_dict*/
+    0,          /*tp_descr_get*/
+    0,          /*tp_descr_set*/
+    0,          /*tp_dictoffset*/
+    asis_init, /*tp_init*/
+    0,          /*tp_alloc*/
+    asis_new, /*tp_new*/
+};