+++ /dev/null
-/* adapter_qstring.c - QuotedString objects
- *
- * 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.
- */
-
-#include <Python.h>
-#include <structmember.h>
-#include <stringobject.h>
-
-#include <libpq-fe.h>
-#include <string.h>
-
-#define PSYCOPG_MODULE
-#include "psycopg/config.h"
-#include "psycopg/python.h"
-#include "psycopg/psycopg.h"
-#include "psycopg/connection.h"
-#include "psycopg/adapter_qstring.h"
-#include "psycopg/microprotocols_proto.h"
-
-
-/** the quoting code */
-
-#ifndef PSYCOPG_OWN_QUOTING
-static size_t
-qstring_escape(char *to, char *from, size_t len, PGconn *conn)
-{
-#if PG_MAJOR_VERSION > 8 || \
- (PG_MAJOR_VERSION == 8 && PG_MINOR_VERSION > 1) || \
- (PG_MAJOR_VERSION == 8 && PG_MINOR_VERSION == 1 && PG_PATCH_VERSION >= 4)
- int err;
- if (conn)
- return PQescapeStringConn(conn, to, from, len, &err);
- else
-#endif
- return PQescapeString(to, from, len);
-}
-#else
-static size_t
-qstring_escape(char *to, char *from, size_t len, PGconn *conn)
-{
- int i, j;
-
- for (i=0, j=0; i<len; i++) {
- switch(from[i]) {
-
- case '\'':
- to[j++] = '\'';
- to[j++] = '\'';
- break;
-
- case '\\':
- to[j++] = '\\';
- to[j++] = '\\';
- break;
-
- case '\0':
- /* do nothing, embedded \0 are discarded */
- break;
-
- default:
- to[j++] = from[i];
- }
- }
- to[j] = '\0';
-
- Dprintf("qstring_quote: to = %s", to);
- return strlen(to);
-}
-#endif
-
-/* qstring_quote - do the quote process on plain and unicode strings */
-
-static PyObject *
-qstring_quote(qstringObject *self)
-{
- PyObject *str;
- char *s, *buffer;
- int len;
-
- /* if the wrapped object is an unicode object we can encode it to match
- self->encoding but if the encoding is not specified we don't know what
- to do and we raise an exception */
-
- /* TODO: we need a real translation table from postgres encoding names to
- python ones here */
-
- if (PyUnicode_Check(self->wrapped) && self->encoding) {
- PyObject *enc = PyDict_GetItemString(psycoEncodings, self->encoding);
- /* note that pgenc is a borrowed reference */
-
- if (enc) {
- char *s = PyString_AsString(enc);
- Dprintf("qstring_quote: encoding unicode object to %s", s);
- str = PyUnicode_AsEncodedString(self->wrapped, s, NULL);
- Dprintf("qstring_quote: got encoded object at %p", str);
- if (str == NULL) return NULL;
- }
- else {
- /* can't find the right encoder, raise exception */
- PyErr_Format(InterfaceError,
- "can't encode unicode string to %s", self->encoding);
- return NULL;
- }
- }
-
- /* if the wrapped object is a simple string, we don't know how to
- (re)encode it, so we pass it as-is */
- else if (PyString_Check(self->wrapped)) {
- str = self->wrapped;
- /* INCREF to make it ref-wise identical to unicode one */
- Py_INCREF(str);
- }
-
- /* if the wrapped object is not a string, this is an error */
- else {
- PyErr_SetString(PyExc_TypeError,
- "can't quote non-string object (or missing encoding)");
- return NULL;
- }
-
- /* encode the string into buffer */
- PyString_AsStringAndSize(str, &s, &len);
-
- buffer = (char *)PyMem_Malloc((len*2+3) * sizeof(char));
- if (buffer == NULL) {
- Py_DECREF(str);
- PyErr_NoMemory();
- return NULL;
- }
-
- Py_BEGIN_ALLOW_THREADS;
- len = qstring_escape(buffer+1, s, len,
- self->conn ? ((connectionObject*)self->conn)->pgconn : NULL);
- buffer[0] = '\'' ; buffer[len+1] = '\'';
- Py_END_ALLOW_THREADS;
-
- self->buffer = PyString_FromStringAndSize(buffer, len+2);
- PyMem_Free(buffer);
- Py_DECREF(str);
-
- return self->buffer;
-}
-
-/* qstring_str, qstring_getquoted - return result of quoting */
-
-static PyObject *
-qstring_str(qstringObject *self)
-{
- if (self->buffer == NULL) {
- qstring_quote(self);
- }
- Py_XINCREF(self->buffer);
- return self->buffer;
-}
-
-PyObject *
-qstring_getquoted(qstringObject *self, PyObject *args)
-{
- if (!PyArg_ParseTuple(args, "")) return NULL;
- return qstring_str(self);
-}
-
-PyObject *
-qstring_prepare(qstringObject *self, PyObject *args)
-{
- connectionObject *conn;
-
- if (!PyArg_ParseTuple(args, "O", &conn))
- return NULL;
-
- /* we bother copying the encoding only if the wrapped string is unicode,
- we don't need the encoding if that's not the case */
- if (PyUnicode_Check(self->wrapped)) {
- if (self->encoding) free(self->encoding);
- self->encoding = strdup(conn->encoding);
- Dprintf("qstring_prepare: set encoding to %s", conn->encoding);
- }
-
- Py_XDECREF(self->conn);
- if (conn) {
- self->conn = (PyObject*)conn;
- Py_INCREF(self->conn);
- }
-
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-PyObject *
-qstring_conform(qstringObject *self, PyObject *args)
-{
- PyObject *res, *proto;
-
- if (!PyArg_ParseTuple(args, "O", &proto)) return NULL;
-
- if (proto == (PyObject*)&isqlquoteType)
- res = (PyObject*)self;
- else
- res = Py_None;
-
- Py_INCREF(res);
- return res;
-}
-
-/** the QuotedString object **/
-
-/* object member list */
-
-static struct PyMemberDef qstringObject_members[] = {
- {"adapted", T_OBJECT, offsetof(qstringObject, wrapped), RO},
- {"buffer", T_OBJECT, offsetof(qstringObject, buffer), RO},
- {"encoding", T_STRING, offsetof(qstringObject, encoding), RO},
- {NULL}
-};
-
-/* object method table */
-
-static PyMethodDef qstringObject_methods[] = {
- {"getquoted", (PyCFunction)qstring_getquoted, METH_VARARGS,
- "getquoted() -> wrapped object value as SQL-quoted string"},
- {"prepare", (PyCFunction)qstring_prepare, METH_VARARGS,
- "prepare(conn) -> set encoding to conn->encoding and store conn"},
- {"__conform__", (PyCFunction)qstring_conform, METH_VARARGS, NULL},
- {NULL} /* Sentinel */
-};
-
-/* initialization and finalization methods */
-
-static int
-qstring_setup(qstringObject *self, PyObject *str, char *enc)
-{
- Dprintf("qstring_setup: init qstring object at %p, refcnt = %d",
- self, ((PyObject *)self)->ob_refcnt);
-
- self->buffer = NULL;
- self->conn = NULL;
-
- /* FIXME: remove this orrible strdup */
- if (enc) self->encoding = strdup(enc);
-
- self->wrapped = str;
- Py_INCREF(self->wrapped);
-
- Dprintf("qstring_setup: good qstring object at %p, refcnt = %d",
- self, ((PyObject *)self)->ob_refcnt);
- return 0;
-}
-
-static void
-qstring_dealloc(PyObject* obj)
-{
- qstringObject *self = (qstringObject *)obj;
-
- Py_XDECREF(self->wrapped);
- Py_XDECREF(self->buffer);
- Py_XDECREF(self->conn);
-
- if (self->encoding) free(self->encoding);
-
- Dprintf("qstring_dealloc: deleted qstring object at %p, refcnt = %d",
- obj, obj->ob_refcnt);
-
- obj->ob_type->tp_free(obj);
-}
-
-static int
-qstring_init(PyObject *obj, PyObject *args, PyObject *kwds)
-{
- PyObject *str;
- char *enc = "latin-1"; /* default encoding as in Python */
-
- if (!PyArg_ParseTuple(args, "O|s", &str, &enc))
- return -1;
-
- return qstring_setup((qstringObject *)obj, str, enc);
-}
-
-static PyObject *
-qstring_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
-{
- return type->tp_alloc(type, 0);
-}
-
-static void
-qstring_del(PyObject* self)
-{
- PyObject_Del(self);
-}
-
-static PyObject *
-qstring_repr(qstringObject *self)
-{
- return PyString_FromFormat("<psycopg2._psycopg.QuotedString object at %p>",
- self);
-}
-
-/* object type */
-
-#define qstringType_doc \
-"QuotedString(str, enc) -> new quoted object with 'enc' encoding"
-
-PyTypeObject qstringType = {
- PyObject_HEAD_INIT(NULL)
- 0,
- "psycopg2._psycopg.QuotedString",
- sizeof(qstringObject),
- 0,
- qstring_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
-
- 0, /*tp_compare*/
- (reprfunc)qstring_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
-
- 0, /*tp_call*/
- (reprfunc)qstring_str, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
-
- Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
-
- qstringType_doc, /*tp_doc*/
-
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
-
- 0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
-
- 0, /*tp_iter*/
- 0, /*tp_iternext*/
-
- /* Attribute descriptor and subclassing stuff */
-
- qstringObject_methods, /*tp_methods*/
- qstringObject_members, /*tp_members*/
- 0, /*tp_getset*/
- 0, /*tp_base*/
- 0, /*tp_dict*/
-
- 0, /*tp_descr_get*/
- 0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
-
- qstring_init, /*tp_init*/
- 0, /*tp_alloc will be set to PyType_GenericAlloc in module init*/
- qstring_new, /*tp_new*/
- (freefunc)qstring_del, /*tp_free Low-level free-memory routine */
- 0, /*tp_is_gc For PyObject_IS_GC */
- 0, /*tp_bases*/
- 0, /*tp_mro method resolution order */
- 0, /*tp_cache*/
- 0, /*tp_subclasses*/
- 0 /*tp_weaklist*/
-};
-
-
-/** module-level functions **/
-
-PyObject *
-psyco_QuotedString(PyObject *module, PyObject *args)
-{
- PyObject *str;
- char *enc = "latin-1"; /* default encoding as in Python */
-
- if (!PyArg_ParseTuple(args, "O|s", &str, &enc))
- return NULL;
-
- return PyObject_CallFunction((PyObject *)&qstringType, "Os", str, enc);
-}
git://git.onelab.eu / plcapi.git / blobdiff