1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* microprotocols.c - minimalist and non-validating protocols implementation
*
* Copyright (C) 2003-2004 Federico Di Gregorio <fog@debian.org>
*
* This file is part of psycopg.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2,
* or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <structmember.h>
#define PSYCOPG_MODULE
#include "psycopg/config.h"
#include "psycopg/python.h"
#include "psycopg/psycopg.h"
#include "psycopg/cursor.h"
#include "psycopg/connection.h"
#include "psycopg/microprotocols.h"
#include "psycopg/microprotocols_proto.h"
/** the adapters registry **/
PyObject *psyco_adapters;
/* microprotocols_init - initialize the adapters dictionary */
int
microprotocols_init(PyObject *dict)
{
/* create adapters dictionary and put it in module namespace */
if ((psyco_adapters = PyDict_New()) == NULL) {
return -1;
}
PyDict_SetItemString(dict, "adapters", psyco_adapters);
return 0;
}
/* microprotocols_add - add a reverse type-caster to the dictionary */
int
microprotocols_add(PyTypeObject *type, PyObject *proto, PyObject *cast)
{
if (proto == NULL) proto = (PyObject*)&isqlquoteType;
Dprintf("microprotocols_add: cast %p for (%s, ?)", cast, type->tp_name);
PyDict_SetItem(psyco_adapters,
Py_BuildValue("(OO)", (PyObject*)type, proto),
cast);
return 0;
}
/* microprotocols_adapt - adapt an object to the built-in protocol */
PyObject *
microprotocols_adapt(PyObject *obj, PyObject *proto, PyObject *alt)
{
PyObject *adapter, *key;
/* we don't check for exact type conformance as specified in PEP 246
because the ISQLQuote type is abstract and there is no way to get a
quotable object to be its instance */
Dprintf("microprotocols_adapt: trying to adapt %s", obj->ob_type->tp_name);
/* look for an adapter in the registry */
key = Py_BuildValue("(OO)", (PyObject*)obj->ob_type, proto);
adapter = PyDict_GetItem(psyco_adapters, key);
Py_DECREF(key);
if (adapter) {
PyObject *adapted = PyObject_CallFunctionObjArgs(adapter, obj, NULL);
return adapted;
}
/* try to have the protocol adapt this object*/
if (PyObject_HasAttrString(proto, "__adapt__")) {
PyObject *adapted = PyObject_CallMethod(proto, "__adapt__", "O", obj);
if (adapted && adapted != Py_None) return adapted;
Py_XDECREF(adapted);
if (PyErr_Occurred() && !PyErr_ExceptionMatches(PyExc_TypeError))
return NULL;
}
/* and finally try to have the object adapt itself */
if (PyObject_HasAttrString(obj, "__conform__")) {
PyObject *adapted = PyObject_CallMethod(obj, "__conform__","O", proto);
if (adapted && adapted != Py_None) return adapted;
Py_XDECREF(adapted);
if (PyErr_Occurred() && !PyErr_ExceptionMatches(PyExc_TypeError))
return NULL;
}
/* else set the right exception and return NULL */
psyco_set_error(ProgrammingError, NULL, "can't adapt", NULL, NULL);
return NULL;
}
/* microprotocol_getquoted - utility function that adapt and call getquoted */
PyObject *
microprotocol_getquoted(PyObject *obj, connectionObject *conn)
{
PyObject *res = NULL;
PyObject *tmp = microprotocols_adapt(
obj, (PyObject*)&isqlquoteType, NULL);
if (tmp != NULL) {
Dprintf("microprotocol_getquoted: adapted to %s",
tmp->ob_type->tp_name);
/* if requested prepare the object passing it the connection */
if (PyObject_HasAttrString(tmp, "prepare") && conn) {
res = PyObject_CallMethod(tmp, "prepare", "O", (PyObject*)conn);
if (res == NULL) {
Py_DECREF(tmp);
return NULL;
}
else {
Py_DECREF(res);
}
}
/* call the getquoted method on tmp (that should exist because we
adapted to the right protocol) */
res = PyObject_CallMethod(tmp, "getquoted", NULL);
Py_DECREF(tmp);
}
/* we return res with one extra reference, the caller shall free it */
return res;
}
/** module-level functions **/
PyObject *
psyco_microprotocols_adapt(cursorObject *self, PyObject *args)
{
PyObject *obj, *alt = NULL;
PyObject *proto = (PyObject*)&isqlquoteType;
if (!PyArg_ParseTuple(args, "O|OO", &obj, &proto, &alt)) return NULL;
return microprotocols_adapt(obj, proto, alt);
}
|
