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 #if PY_MAJOR_VERSION >= 3
  33 #define PyStr_Check PyUnicode_Check
  34 #define PyStr_AsUTF8 PyUnicode_AsUTF8
  35 #else
  36 #define PyStr_Check PyString_Check
  37 #define PyStr_AsUTF8 PyString_AsString
  38 #endif
  39
  40 /**
  41  * Find out PyTypeObject in ldb module for a given typename
  42  */
  43 static PyTypeObject * PyLdb_GetPyType(const char *typename)
  44 {
  45         PyObject *py_obj = NULL;
  46
  47         if (ldb_module == NULL) {
  48                 ldb_module = PyImport_ImportModule("ldb");
  49                 if (ldb_module == NULL) {
  50                         return NULL;
  51                 }
  52         }
  53
  54         py_obj = PyObject_GetAttrString(ldb_module, typename);
  55
  56         return (PyTypeObject*)py_obj;
  57 }
  58
  59 /**
  60  * Obtain a ldb DN from a Python object.
  61  *
  62  * @param mem_ctx Memory context
  63  * @param object Python object
  64  * @param ldb_ctx LDB context
  65  * @return Whether or not the conversion succeeded
  66  */
  67 bool pyldb_Object_AsDn(TALLOC_CTX *mem_ctx, PyObject *object,
  68                    struct ldb_context *ldb_ctx, struct ldb_dn **dn)
  69 {
  70         struct ldb_dn *odn;
  71         PyTypeObject *PyLdb_Dn_Type;
  72
  73         if (ldb_ctx != NULL && PyStr_Check(object)) {
  74                 odn = ldb_dn_new(mem_ctx, ldb_ctx, PyStr_AsUTF8(object));
  75                 *dn = odn;
  76                 return true;
  77         }
  78
  79         if (ldb_ctx != NULL && PyBytes_Check(object)) {
  80                 odn = ldb_dn_new(mem_ctx, ldb_ctx, PyBytes_AsString(object));
  81                 *dn = odn;
  82                 return true;
  83         }
  84
  85         PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
  86         if (PyLdb_Dn_Type == NULL) {
  87                 return false;
  88         }
  89
  90         if (PyObject_TypeCheck(object, PyLdb_Dn_Type)) {
  91                 *dn = pyldb_Dn_AsDn(object);
  92                 return true;
  93         }
  94
  95         PyErr_SetString(PyExc_TypeError, "Expected DN");
  96         return false;
  97 }
  98
  99 PyObject *pyldb_Dn_FromDn(struct ldb_dn *dn)
 100 {
 101         PyLdbDnObject *py_ret;
 102         PyTypeObject *PyLdb_Dn_Type;
 103
 104         if (dn == NULL) {
 105                 Py_RETURN_NONE;
 106         }
 107
 108         PyLdb_Dn_Type = PyLdb_GetPyType("Dn");
 109         if (PyLdb_Dn_Type == NULL) {
 110                 return NULL;
 111         }
 112
 113         py_ret = (PyLdbDnObject *)PyLdb_Dn_Type->tp_alloc(PyLdb_Dn_Type, 0);
 114         if (py_ret == NULL) {
 115                 PyErr_NoMemory();
 116                 return NULL;
 117         }
 118         py_ret->mem_ctx = talloc_new(NULL);
 119         py_ret->dn = talloc_reference(py_ret->mem_ctx, dn);
 120         return (PyObject *)py_ret;
 121 }