first commit based on psycopg2 2.9 version

psycopg/typecast.h

@@ -0,0 +1,91 @@
+/* typecast.h - definitions for typecasters
+ *
+ * Copyright (C) 2003-2019 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.
+ */
+
+#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) */