dlls/wbemprox/query.c

   1 /*
   2  * Copyright 2012 Hans Leidekker for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define COBJMACROS
  20
  21 #include "config.h"
  22 #include <stdarg.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wbemcli.h"
  27
  28 #include "wine/debug.h"
  29 #include "wbemprox_private.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(wbemprox);
  32
  33 HRESULT create_view( const struct property *proplist, const WCHAR *class,
  34                      const struct expr *cond, struct view **ret )
  35 {
  36     struct view *view = heap_alloc( sizeof(struct view) );
  37
  38     if (!view) return E_OUTOFMEMORY;
  39     view->proplist = proplist;
  40     view->table    = get_table( class );
  41     view->cond     = cond;
  42     *ret = view;
  43     return S_OK;
  44 }
  45
  46 void destroy_view( struct view *view )
  47 {
  48     heap_free( view );
  49 }
  50
  51 static struct query *alloc_query(void)
  52 {
  53     struct query *query;
  54
  55     if (!(query = heap_alloc( sizeof(*query) ))) return NULL;
  56     list_init( &query->mem );
  57     return query;
  58 }
  59
  60 void free_query( struct query *query )
  61 {
  62     struct list *mem, *next;
  63
  64     destroy_view( query->view );
  65     LIST_FOR_EACH_SAFE( mem, next, &query->mem )
  66     {
  67         heap_free( mem );
  68     }
  69     heap_free( query );
  70 }
  71
  72 HRESULT exec_query( const WCHAR *str, IEnumWbemClassObject **result )
  73 {
  74     HRESULT hr;
  75     struct query *query;
  76
  77     *result = NULL;
  78     if (!(query = alloc_query())) return E_OUTOFMEMORY;
  79     hr = parse_query( str, &query->view, &query->mem );
  80     if (hr != S_OK)
  81     {
  82         free_query( query );
  83         return hr;
  84     }
  85     hr = EnumWbemClassObject_create( NULL, query, (void **)result );
  86     if (hr != S_OK) free_query( query );
  87     return hr;
  88 }