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/* pgcasts_basic.c - basic typecasting functions to python types
*
* Copyright (C) 2001-2010 Federico Di Gregorio <fog@debian.org>
*
* 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 **/
#if PY_MAJOR_VERSION < 3
static PyObject *
typecast_INTEGER_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
char buffer[12];
if (s == NULL) {Py_INCREF(Py_None); return Py_None;}
if (s[len] != '\0') {
strncpy(buffer, s, (size_t) len); buffer[len] = '\0';
s = buffer;
}
return PyInt_FromString((char *)s, NULL, 0);
}
#else
#define typecast_INTEGER_cast typecast_LONGINTEGER_cast
#endif
/** 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_INCREF(Py_None); return Py_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_INCREF(Py_None); return Py_None;}
if (!(str = Text_FromUTF8AndSize(s, len))) { return NULL; }
#if PY_MAJOR_VERSION < 3
flo = PyFloat_FromString(str, NULL);
#else
flo = PyFloat_FromString(str);
#endif
Py_DECREF(str);
return flo;
}
/** STRING - cast strings of any type to python string **/
#if PY_MAJOR_VERSION < 3
static PyObject *
typecast_STRING_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
if (s == NULL) {Py_INCREF(Py_None); return Py_None;}
return PyString_FromStringAndSize(s, len);
}
#else
#define typecast_STRING_cast typecast_UNICODE_cast
#endif
/** 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)
{
char *enc;
if (s == NULL) {Py_INCREF(Py_None); return Py_None;}
enc = ((cursorObject*)curs)->conn->codec;
return PyUnicode_Decode(s, len, enc, NULL);
}
/** BOOLEAN - cast boolean value into right python object **/
static PyObject *
typecast_BOOLEAN_cast(const char *s, Py_ssize_t len, PyObject *curs)
{
PyObject *res;
if (s == NULL) {Py_INCREF(Py_None); return Py_None;}
if (s[0] == 't')
res = Py_True;
else
res = Py_False;
Py_INCREF(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_INCREF(Py_None); return Py_None;}
if ((buffer = PyMem_Malloc(len+1)) == NULL)
return PyErr_NoMemory();
strncpy(buffer, s, (size_t) len); buffer[len] = '\0';
decimalType = psyco_GetDecimalType();
/* Fall back on float if decimal is not available */
if (decimalType != NULL) {
res = PyObject_CallFunction(decimalType, "s", buffer);
Py_DECREF(decimalType);
}
else {
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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