92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/* typecast.h - definitions for typecasters
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*
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* Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
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* Copyright (C) 2020-2021 The Psycopg Team
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*
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* This file is part of psycopg.
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*
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* psycopg2 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link this program with the OpenSSL library (or with
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* modified versions of OpenSSL that use the same license as OpenSSL),
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* and distribute linked combinations including the two.
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*
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* You must obey the GNU Lesser General Public License in all respects for
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* all of the code used other than OpenSSL.
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*
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* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*/
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#ifndef PSYCOPG_TYPECAST_H
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#define PSYCOPG_TYPECAST_H 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* type of type-casting functions (both C and Python) */
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typedef PyObject *(*typecast_function)(const char *str, Py_ssize_t len,
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PyObject *cursor);
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/** typecast type **/
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extern HIDDEN PyTypeObject typecastType;
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typedef struct {
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PyObject_HEAD
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PyObject *name; /* the name of this type */
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PyObject *values; /* the different types this instance can match */
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typecast_function ccast; /* the C casting function */
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PyObject *pcast; /* the python casting function */
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PyObject *bcast; /* base cast, used by array typecasters */
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} typecastObject;
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/* the initialization values are stored here */
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typedef struct {
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char *name;
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long int *values;
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typecast_function cast;
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/* base is the base typecaster for arrays */
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char *base;
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} typecastObject_initlist;
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/* the type dictionary, much faster to access it globally */
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extern HIDDEN PyObject *psyco_types;
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extern HIDDEN PyObject *psyco_binary_types;
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/* the default casting objects, used when no other objects are available */
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extern HIDDEN PyObject *psyco_default_cast;
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extern HIDDEN PyObject *psyco_default_binary_cast;
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/** exported functions **/
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/* used by module.c to init the type system and register types */
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RAISES_NEG HIDDEN int typecast_init(PyObject *dict);
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RAISES_NEG HIDDEN int typecast_add(PyObject *obj, PyObject *dict, int binary);
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/* the C callable typecastObject creator function */
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HIDDEN PyObject *typecast_from_c(typecastObject_initlist *type, PyObject *d);
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/* the python callable typecast creator functions */
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HIDDEN PyObject *typecast_from_python(
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PyObject *self, PyObject *args, PyObject *keywds);
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HIDDEN PyObject *typecast_array_from_python(
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PyObject *self, PyObject *args, PyObject *keywds);
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/* the function used to dispatch typecasting calls */
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HIDDEN PyObject *typecast_cast(
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PyObject *self, const char *str, Py_ssize_t len, PyObject *curs);
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#endif /* !defined(PSYCOPG_TYPECAST_H) */
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