text: /* typecast.h - definitions for typecasters
   *
   * Copyright (C) 2003-2010 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.
   */
  
  #ifndef PSYCOPG_TYPECAST_H
  #define PSYCOPG_TYPECAST_H 1
  
  #define PY_SSIZE_T_CLEAN
  #include <Python.h>
  
  #include "psycopg/config.h"
  
  #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 */
  HIDDEN int typecast_init(PyObject *dict);
  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 function */
  HIDDEN PyObject *typecast_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) */
  