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/* pgcasts_basic.c - basic typecasting functions to python types
*
* Copyright (C) 2001-2019 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.
*/
/** INTEGER - cast normal integers (4 bytes) to python int **/
#define typecast_INTEGER_cast typecast_LONGINTEGER_cast
/** LONGINTEGER - cast long integers (8 bytes) to python long **/
static PyObject *
typecast_LONGINTEGER_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
char buffer[24];
if (s == NULL) { Py_RETURN_NONE; }
if (s[len] != '\0') {
strncpy(buffer, s, (size_t) len); buffer[len] = '\0';
s = buffer;
}
return PyLong_FromString((char *)s, NULL, 0);
}
/** FLOAT - cast floating point numbers to python float **/
static PyObject *
typecast_FLOAT_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
PyObject *str = NULL, *flo = NULL;
if (s == NULL) { Py_RETURN_NONE; }
if (!(str = Text_FromUTF8AndSize(s, len))) { return NULL; }
flo = PyFloat_FromString(str);
Py_DECREF(str);
return flo;
}
/** BYTES - cast strings of any type to python bytes **/
static PyObject *
typecast_BYTES_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
if (s == NULL) { Py_RETURN_NONE; }
return Bytes_FromStringAndSize(s, len);
}
/** UNICODE - cast strings of any type to a python unicode object **/
static PyObject *
typecast_UNICODE_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
connectionObject *conn;
if (s == NULL) { Py_RETURN_NONE; }
conn = ((cursorObject*)curs)->conn;
return conn_decode(conn, s, len);
}
/** STRING - cast strings of any type to python string **/
#define typecast_STRING_cast typecast_UNICODE_cast
/** BOOLEAN - cast boolean value into right python object **/
static PyObject *
typecast_BOOLEAN_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
PyObject *res = NULL;
if (s == NULL) { Py_RETURN_NONE; }
switch (s[0]) {
case 't':
case 'T':
res = Py_True;
break;
case 'f':
case 'F':
res = Py_False;
break;
default:
PyErr_Format(InterfaceError, "can't parse boolean: '%s'", s);
break;
}
Py_XINCREF(res);
return res;
}
/** DECIMAL - cast any kind of number into a Python Decimal object **/
static PyObject *
typecast_DECIMAL_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
PyObject *res = NULL;
PyObject *decimalType;
char *buffer;
if (s == NULL) { Py_RETURN_NONE; }
if ((buffer = PyMem_Malloc(len+1)) == NULL)
return PyErr_NoMemory();
strncpy(buffer, s, (size_t) len); buffer[len] = '\0';
decimalType = psyco_get_decimal_type();
/* Fall back on float if decimal is not available */
if (decimalType != NULL) {
res = PyObject_CallFunction(decimalType, "s", buffer);
Py_DECREF(decimalType);
}
else {
PyErr_Clear();
res = PyObject_CallFunction((PyObject*)&PyFloat_Type, "s", buffer);
}
PyMem_Free(buffer);
return res;
}
/* some needed aliases */
#define typecast_NUMBER_cast typecast_FLOAT_cast
#define typecast_ROWID_cast typecast_INTEGER_cast
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