source/python/py_conv.c

   1 /*
   2    Python wrappers for DCERPC/SMB client routines.
   3
   4    Copyright (C) Tim Potter, 2002
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "py_conv.h"
  22
  23 /* Helper for rpcstr_pull() function */
  24
  25 static void fstr_pull(fstring str, UNISTR *uni)
  26 {
  27         rpcstr_pull(str, uni->buffer, sizeof(fstring), -1, STR_TERMINATE);
  28 }
  29
  30 static void fstr_pull2(fstring str, UNISTR2 *uni)
  31 {
  32         rpcstr_pull(str, uni->buffer, sizeof(fstring), -1, STR_TERMINATE);
  33 }
  34
  35 /* Convert a structure to a Python dict */
  36
  37 PyObject *from_struct(void *s, struct pyconv *conv)
  38 {
  39         PyObject *obj, *item;
  40         int i;
  41
  42         obj = PyDict_New();
  43
  44         for (i = 0; conv[i].name; i++) {
  45                 switch (conv[i].type) {
  46                 case PY_UNISTR: {
  47                         UNISTR *u = (UNISTR *)((char *)s + conv[i].offset);
  48                         fstring str = "";
  49
  50                         if (u->buffer)
  51                                 fstr_pull(str, u);
  52
  53                         item = PyString_FromString(str);
  54                         PyDict_SetItemString(obj, conv[i].name, item);
  55
  56                         break;
  57                 }
  58                 case PY_UNISTR2: {
  59                         UNISTR2 *u = (UNISTR2 *)((char *)s + conv[i].offset);
  60                         fstring str = "";
  61
  62                         if (u->buffer)
  63                                 fstr_pull2(str, u);
  64
  65                         item = PyString_FromString(str);
  66                         PyDict_SetItemString(obj, conv[i].name, item);
  67
  68                         break;
  69                 }
  70                 case PY_UINT32: {
  71                         uint32 *u = (uint32 *)((char *)s + conv[i].offset);
  72
  73                         item = PyInt_FromLong(*u);
  74                         PyDict_SetItemString(obj, conv[i].name, item);
  75
  76                         break;
  77                 }
  78                 case PY_UINT16: {
  79                         uint16 *u = (uint16 *)((char *)s + conv[i].offset);
  80
  81                         item = PyInt_FromLong(*u);
  82                         PyDict_SetItemString(obj, conv[i].name, item);
  83
  84                         break;
  85                 }
  86                 case PY_STRING: {
  87                         char *str = (char *)s + conv[i].offset;
  88
  89                         item = PyString_FromString(str);
  90                         PyDict_SetItemString(obj, conv[i].name, item);
  91
  92                         break;
  93                 }
  94                 case PY_UID: {
  95                         uid_t *uid = (uid_t *)((char *)s + conv[i].offset);
  96
  97                         item = PyInt_FromLong(*uid);
  98                         PyDict_SetItemString(obj, conv[i].name, item);
  99
 100                         break;
 101                 }
 102                 case PY_GID: {
 103                         gid_t *gid = (gid_t *)((char *)s + conv[i].offset);
 104
 105                         item = PyInt_FromLong(*gid);
 106                         PyDict_SetItemString(obj, conv[i].name, item);
 107
 108                         break;
 109                 }
 110                 default:
 111
 112                         break;
 113                 }
 114         }
 115
 116         return obj;
 117 }
 118
 119 /* Convert a Python dict to a structure */
 120
 121 BOOL to_struct(void *s, PyObject *dict, struct pyconv *conv)
 122 {
 123         PyObject *visited, *key, *value;
 124         BOOL result = False;
 125         int i;
 126
 127         visited = PyDict_New();
 128
 129         for (i = 0; conv[i].name; i++) {
 130                 PyObject *obj;
 131
 132                 obj = PyDict_GetItemString(dict, conv[i].name);
 133
 134                 if (!obj)
 135                         goto done;
 136
 137                 switch (conv[i].type) {
 138                 case PY_UNISTR: {
 139                         UNISTR *u = (UNISTR *)((char *)s + conv[i].offset);
 140                         char *str = "";
 141
 142                         if (!PyString_Check(obj))
 143                                 goto done;
 144
 145                         str = PyString_AsString(obj);
 146                         init_unistr(u, str);
 147
 148                         break;
 149                 }
 150                 case PY_UINT32: {
 151                         uint32 *u = (uint32 *)((char *)s + conv[i].offset);
 152
 153                         if (!PyInt_Check(obj))
 154                                 goto done;
 155
 156                         *u = PyInt_AsLong(obj);
 157
 158                         break;
 159                 }
 160                 case PY_UINT16: {
 161                         uint16 *u = (uint16 *)((char *)s + conv[i].offset);
 162
 163                         if (!PyInt_Check(obj))
 164                                 goto done;
 165
 166                         *u = PyInt_AsLong(obj);
 167                         break;
 168                 }
 169                 default:
 170                         break;
 171                 }
 172
 173                 /* Mark as visited */
 174
 175                 PyDict_SetItemString(visited, conv[i].name,
 176                                      PyInt_FromLong(1));
 177         }
 178
 179         /* Iterate over each item in the input dictionary and see if it was
 180            visited.  If it wasn't then the user has added some extra crap
 181            to the dictionary. */
 182
 183         i = 0;
 184
 185         while (PyDict_Next(dict, &i, &key, &value)) {
 186                 if (!PyDict_GetItem(visited, key))
 187                         goto done;
 188         }
 189
 190         result = True;
 191
 192 done:
 193         /* We must decrement the reference count here or the visited
 194            dictionary will not be freed. */
 195
 196         Py_DECREF(visited);
 197
 198         return result;
 199 }
 200
 201 /* Convert a NULL terminated list of NULL terminated unicode strings
 202    to a list of (char *) strings */
 203
 204 PyObject *from_unistr_list(uint16 *dependentfiles)
 205 {
 206         PyObject *list;
 207         int offset = 0;
 208
 209         list = PyList_New(0);
 210
 211         while (*(dependentfiles + offset) != 0) {
 212                 fstring name;
 213                 int len;
 214
 215                 len = rpcstr_pull(name, dependentfiles + offset,
 216                                   sizeof(fstring), -1, STR_TERMINATE);
 217
 218                 offset += len / 2;
 219                 PyList_Append(list, PyString_FromString(name));
 220         }
 221
 222         return list;
 223 }