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/* adapter_float.c - psycopg pfloat type wrapper implementation
*
* 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_pfloat.h"
#include "psycopg/microprotocols_proto.h"
#include <floatobject.h>
#include <math.h>
/** the Float object **/
static PyObject *
pfloat_getquoted(pfloatObject *self, PyObject *args)
{
PyObject *rv;
double n = PyFloat_AsDouble(self->wrapped);
if (isnan(n))
rv = Bytes_FromString("'NaN'::float");
else if (isinf(n)) {
if (n > 0)
rv = Bytes_FromString("'Infinity'::float");
else
rv = Bytes_FromString("'-Infinity'::float");
}
else {
if (!(rv = PyObject_Repr(self->wrapped))) {
goto exit;
}
/* unicode to bytes */
{
PyObject *tmp = PyUnicode_AsUTF8String(rv);
Py_DECREF(rv);
if (!(rv = tmp)) {
goto exit;
}
}
if ('-' == Bytes_AS_STRING(rv)[0]) {
/* Prepend a space in front of negative numbers (ticket #57) */
PyObject *tmp;
if (!(tmp = Bytes_FromString(" "))) {
Py_DECREF(rv);
rv = NULL;
goto exit;
}
Bytes_ConcatAndDel(&tmp, rv);
if (!(rv = tmp)) {
goto exit;
}
}
}
exit:
return rv;
}
static PyObject *
pfloat_str(pfloatObject *self)
{
return psyco_ensure_text(pfloat_getquoted(self, NULL));
}
static PyObject *
pfloat_conform(pfloatObject *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 Float object */
/* object member list */
static struct PyMemberDef pfloatObject_members[] = {
{"adapted", T_OBJECT, offsetof(pfloatObject, wrapped), READONLY},
{NULL}
};
/* object method table */
static PyMethodDef pfloatObject_methods[] = {
{"getquoted", (PyCFunction)pfloat_getquoted, METH_NOARGS,
"getquoted() -> wrapped object value as SQL-quoted string"},
{"__conform__", (PyCFunction)pfloat_conform, METH_VARARGS, NULL},
{NULL} /* Sentinel */
};
/* initialization and finalization methods */
static int
pfloat_setup(pfloatObject *self, PyObject *obj)
{
Dprintf("pfloat_setup: init pfloat object at %p, refcnt = "
FORMAT_CODE_PY_SSIZE_T,
self, Py_REFCNT(self)
);
Py_INCREF(obj);
self->wrapped = obj;
Dprintf("pfloat_setup: good pfloat object at %p, refcnt = "
FORMAT_CODE_PY_SSIZE_T,
self, Py_REFCNT(self)
);
return 0;
}
static void
pfloat_dealloc(PyObject* obj)
{
pfloatObject *self = (pfloatObject *)obj;
Py_CLEAR(self->wrapped);
Dprintf("pfloat_dealloc: deleted pfloat object at %p, refcnt = "
FORMAT_CODE_PY_SSIZE_T,
obj, Py_REFCNT(obj)
);
Py_TYPE(obj)->tp_free(obj);
}
static int
pfloat_init(PyObject *obj, PyObject *args, PyObject *kwds)
{
PyObject *o;
if (!PyArg_ParseTuple(args, "O", &o))
return -1;
return pfloat_setup((pfloatObject *)obj, o);
}
static PyObject *
pfloat_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
return type->tp_alloc(type, 0);
}
/* object type */
#define pfloatType_doc \
"Float(str) -> new Float adapter object"
PyTypeObject pfloatType = {
PyVarObject_HEAD_INIT(NULL, 0)
"psycopg2.extensions.Float",
sizeof(pfloatObject), 0,
pfloat_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)pfloat_str, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
pfloatType_doc, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
pfloatObject_methods, /*tp_methods*/
pfloatObject_members, /*tp_members*/
0, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
0, /*tp_dictoffset*/
pfloat_init, /*tp_init*/
0, /*tp_alloc*/
pfloat_new, /*tp_new*/
};
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