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/* typecast.h - definitions for typecasters
*
* Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
* Copyright (C) 2020 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.
*/
#ifndef PSYCOPG_TYPECAST_H
#define PSYCOPG_TYPECAST_H 1
#ifdef __cplusplus
extern "C" {
#endif
/* type of type-casting functions (both C and Python) */
typedef PyObject *(*typecast_function)(const char *str, Py_ssize_t len,
PyObject *cursor);
/** typecast type **/
extern HIDDEN PyTypeObject typecastType;
typedef struct {
PyObject_HEAD
PyObject *name; /* the name of this type */
PyObject *values; /* the different types this instance can match */
typecast_function ccast; /* the C casting function */
PyObject *pcast; /* the python casting function */
PyObject *bcast; /* base cast, used by array typecasters */
} typecastObject;
/* the initialization values are stored here */
typedef struct {
char *name;
long int *values;
typecast_function cast;
/* base is the base typecaster for arrays */
char *base;
} typecastObject_initlist;
/* the type dictionary, much faster to access it globally */
extern HIDDEN PyObject *psyco_types;
extern HIDDEN PyObject *psyco_binary_types;
/* the default casting objects, used when no other objects are available */
extern HIDDEN PyObject *psyco_default_cast;
extern HIDDEN PyObject *psyco_default_binary_cast;
/** exported functions **/
/* used by module.c to init the type system and register types */
RAISES_NEG HIDDEN int typecast_init(PyObject *dict);
RAISES_NEG HIDDEN int typecast_add(PyObject *obj, PyObject *dict, int binary);
/* the C callable typecastObject creator function */
HIDDEN PyObject *typecast_from_c(typecastObject_initlist *type, PyObject *d);
/* the python callable typecast creator functions */
HIDDEN PyObject *typecast_from_python(
PyObject *self, PyObject *args, PyObject *keywds);
HIDDEN PyObject *typecast_array_from_python(
PyObject *self, PyObject *args, PyObject *keywds);
/* the function used to dispatch typecasting calls */
HIDDEN PyObject *typecast_cast(
PyObject *self, const char *str, Py_ssize_t len, PyObject *curs);
#endif /* !defined(PSYCOPG_TYPECAST_H) */
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