Wine Cross Reference
wine/dlls/msi/delete.c

   /*
    * Implementation of the Microsoft Installer (msi.dll)
    *
    * Copyright 2002-2005 Mike McCormack for CodeWeavers
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include <stdarg.h>
  
  #include "windef.h"
  #include "winbase.h"
  #include "winerror.h"
  #include "wine/debug.h"
  #include "msi.h"
  #include "msiquery.h"
  #include "objbase.h"
  #include "objidl.h"
  #include "msipriv.h"
  #include "winnls.h"
  
  #include "query.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(msidb);
  
  
  /*
   * Code to delete rows from a table.
   *
   * We delete rows by blanking them out rather than trying to remove the row.
   * This appears to be what the native MSI does (or tries to do). For the query:
   *
   * delete from Property
   *
   * some non-zero entries are left in the table by native MSI.  I'm not sure if
   * that's a bug in the way I'm running the query, or a just a bug.
   */
  
  typedef struct tagMSIDELETEVIEW
  {
      MSIVIEW        view;
      MSIDATABASE   *db;
      MSIVIEW       *table;
  } MSIDELETEVIEW;
  
  static UINT DELETE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  {
      MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  
      TRACE("%p %d %d %p\n", dv, row, col, val );
  
      return ERROR_FUNCTION_FAILED;
  }
  
  static UINT DELETE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
  {
      MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  
      TRACE("%p %d %d %p\n", dv, row, col, stm );
  
      return ERROR_FUNCTION_FAILED;
  }
  
  static UINT DELETE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
  {
      MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
      UINT r, i, rows = 0, cols = 0;
  
      TRACE("%p %p\n", dv, record);
  
      if( !dv->table )
           return ERROR_FUNCTION_FAILED;
  
      r = dv->table->ops->execute( dv->table, record );
      if( r != ERROR_SUCCESS )
          return r;
  
      r = dv->table->ops->get_dimensions( dv->table, &rows, &cols );
      if( r != ERROR_SUCCESS )
          return r;
  
      TRACE("deleting %d rows\n", rows);
  
      /* blank out all the rows that match */
      for ( i=0; i<rows; i++ )
          dv->table->ops->delete_row( dv->table, i );
  
     return ERROR_SUCCESS;
 }
 
 static UINT DELETE_close( struct tagMSIVIEW *view )
 {
     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 
     TRACE("%p\n", dv );
 
     if( !dv->table )
          return ERROR_FUNCTION_FAILED;
 
     return dv->table->ops->close( dv->table );
 }
 
 static UINT DELETE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 {
     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 
     TRACE("%p %p %p\n", dv, rows, cols );
 
     if( !dv->table )
          return ERROR_FUNCTION_FAILED;
 
     *rows = 0;
 
     return dv->table->ops->get_dimensions( dv->table, NULL, cols );
 }
 
 static UINT DELETE_get_column_info( struct tagMSIVIEW *view, UINT n, LPCWSTR *name,
                                     UINT *type, BOOL *temporary, LPCWSTR *table_name )
 {
     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 
     TRACE("%p %d %p %p %p %p\n", dv, n, name, type, temporary, table_name );
 
     if( !dv->table )
          return ERROR_FUNCTION_FAILED;
 
     return dv->table->ops->get_column_info( dv->table, n, name,
                                             type, temporary, table_name);
 }
 
 static UINT DELETE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
                            MSIRECORD *rec, UINT row )
 {
     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 
     TRACE("%p %d %p\n", dv, eModifyMode, rec );
 
     return ERROR_FUNCTION_FAILED;
 }
 
 static UINT DELETE_delete( struct tagMSIVIEW *view )
 {
     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 
     TRACE("%p\n", dv );
 
     if( dv->table )
         dv->table->ops->delete( dv->table );
 
     msi_free( dv );
 
     return ERROR_SUCCESS;
 }
 
 static UINT DELETE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
     UINT val, UINT *row, MSIITERHANDLE *handle )
 {
     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 
     return ERROR_FUNCTION_FAILED;
 }
 
 
 static const MSIVIEWOPS delete_ops =
 {
     DELETE_fetch_int,
     DELETE_fetch_stream,
     NULL,
     NULL,
     NULL,
     NULL,
     DELETE_execute,
     DELETE_close,
     DELETE_get_dimensions,
     DELETE_get_column_info,
     DELETE_modify,
     DELETE_delete,
     DELETE_find_matching_rows,
     NULL,
     NULL,
     NULL,
     NULL,
     NULL,
     NULL,
 };
 
 UINT DELETE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
 {
     MSIDELETEVIEW *dv = NULL;
 
     TRACE("%p\n", dv );
 
     dv = msi_alloc_zero( sizeof *dv );
     if( !dv )
         return ERROR_FUNCTION_FAILED;
     
     /* fill the structure */
     dv->view.ops = &delete_ops;
     dv->db = db;
     dv->table = table;
 
     *view = &dv->view;
 
     return ERROR_SUCCESS;
 }