lib/ldb/pyldb_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Python interface to ldb - utility functions.
   5
   6    Copyright (C) 2007-2010 Jelmer Vernooij <jelmer@samba.org>
   7
   8          ** NOTE! The following LGPL license applies to the ldb
   9          ** library. This does NOT imply that all of Samba is released
  10          ** under the LGPL
  11
  12    This library is free software; you can redistribute it and/or
  13    modify it under the terms of the GNU Lesser General Public
  14    License as published by the Free Software Foundation; either
  15    version 3 of the License, or (at your option) any later version.
  16
  17    This library is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    Lesser General Public License for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include <Python.h>
  27 #include "ldb.h"
  28 #include "pyldb.h"
  29
  30 static PyObject *ldb_module = NULL;
  31
  32 /* There's no Py_ssize_t in 2.4, apparently */
  33 #if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 5
  34 typedef int Py_ssize_t;
  35 typedef inquiry lenfunc;
  36 typedef intargfunc ssizeargfunc;
  37 #endif
  38
  39 /**
  40  * Find out PyTypeObject in ldb module for a given typename
  41  */
  42 static PyTypeObject * PyLdb_GetPyType(const char *typename)
  43 {
  44         PyObject *py_obj = NULL;
  45
  46         if (ldb_module == NULL) {
  47                 ldb_module = PyImport_ImportModule("ldb");
  48                 if (ldb_module == NULL) {
  49                         return NULL;
  50                 }
  51         }
  52
  53         py_obj = PyObject_GetAttrString(ldb_module, typename);
  54
  55         return (PyTypeObject*)py_obj;
  56 }
  57
  58 /**
  59  * Obtain a ldb DN from a Python object.
  60  *
  61  * @param mem_ctx Memory context
  62  * @param object Python object
  63  * @param ldb_ctx LDB context
  64  * @return Whether or not the conversion succeeded
  65  */
  66 bool pyldb_Object_AsDn(TALLOC_CTX *mem_ctx, PyObject *object,
  67                    struct ldb_context *ldb_ctx, struct ldb_dn **dn)
  68 {
  69         struct ldb_dn *odn;
  70         PyTypeObject *PyLdb_Dn_Type;
  71
  72         if (ldb_ctx != NULL && PyString_Check(object)) {
  73                 odn = ldb_dn_new(mem_ctx, ldb_ctx, PyString_AsString(object));
  74                 *dn = odn;
  75                 return true;
  76         }
  77
  78         PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
  79         if (PyLdb_Dn_Type == NULL) {
  80                 return false;
  81         }
  82
  83         if (PyObject_TypeCheck(object, PyLdb_Dn_Type)) {
  84                 *dn = pyldb_Dn_AsDn(object);
  85                 return true;
  86         }
  87
  88         PyErr_SetString(PyExc_TypeError, "Expected DN");
  89         return false;
  90 }
  91
  92 PyObject *pyldb_Dn_FromDn(struct ldb_dn *dn)
  93 {
  94         PyLdbDnObject *py_ret;
  95         PyTypeObject *PyLdb_Dn_Type;
  96
  97         if (dn == NULL) {
  98                 Py_RETURN_NONE;
  99         }
 100
 101         PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
 102         if (PyLdb_Dn_Type == NULL) {
 103                 return NULL;
 104         }
 105
 106         py_ret = (PyLdbDnObject *)PyLdb_Dn_Type->tp_alloc(PyLdb_Dn_Type, 0);
 107         if (py_ret == NULL) {
 108                 PyErr_NoMemory();
 109                 return NULL;
 110         }
 111         py_ret->mem_ctx = talloc_new(NULL);
 112         py_ret->dn = talloc_reference(py_ret->mem_ctx, dn);
 113         return (PyObject *)py_ret;
 114 }