reactos/dll/win32/msi/delete.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2002-2005 Mike McCormack for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "msipriv.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
  24
  25 /*
  26  * Code to delete rows from a table.
  27  *
  28  * We delete rows by blanking them out rather than trying to remove the row.
  29  * This appears to be what the native MSI does (or tries to do). For the query:
  30  *
  31  * delete from Property
  32  *
  33  * some non-zero entries are left in the table by native MSI.  I'm not sure if
  34  * that's a bug in the way I'm running the query, or a just a bug.
  35  */
  36
  37 typedef struct tagMSIDELETEVIEW
  38 {
  39     MSIVIEW        view;
  40     MSIDATABASE   *db;
  41     MSIVIEW       *table;
  42 } MSIDELETEVIEW;
  43
  44 static UINT DELETE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  45 {
  46     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  47
  48     TRACE("%p %d %d %p\n", dv, row, col, val );
  49
  50     return ERROR_FUNCTION_FAILED;
  51 }
  52
  53 static UINT DELETE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
  54 {
  55     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  56
  57     TRACE("%p %d %d %p\n", dv, row, col, stm );
  58
  59     return ERROR_FUNCTION_FAILED;
  60 }
  61
  62 static UINT DELETE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
  63 {
  64     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  65     UINT r, i, rows = 0, cols = 0;
  66
  67     TRACE("%p %p\n", dv, record);
  68
  69     if( !dv->table )
  70          return ERROR_FUNCTION_FAILED;
  71
  72     r = dv->table->ops->execute( dv->table, record );
  73     if( r != ERROR_SUCCESS )
  74         return r;
  75
  76     r = dv->table->ops->get_dimensions( dv->table, &rows, &cols );
  77     if( r != ERROR_SUCCESS )
  78         return r;
  79
  80     TRACE("deleting %d rows\n", rows);
  81
  82     /* blank out all the rows that match */
  83     for ( i=0; i<rows; i++ )
  84         dv->table->ops->delete_row( dv->table, i );
  85
  86     return ERROR_SUCCESS;
  87 }
  88
  89 static UINT DELETE_close( struct tagMSIVIEW *view )
  90 {
  91     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  92
  93     TRACE("%p\n", dv );
  94
  95     if( !dv->table )
  96          return ERROR_FUNCTION_FAILED;
  97
  98     return dv->table->ops->close( dv->table );
  99 }
 100
 101 static UINT DELETE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 102 {
 103     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 104
 105     TRACE("%p %p %p\n", dv, rows, cols );
 106
 107     if( !dv->table )
 108          return ERROR_FUNCTION_FAILED;
 109
 110     *rows = 0;
 111
 112     return dv->table->ops->get_dimensions( dv->table, NULL, cols );
 113 }
 114
 115 static UINT DELETE_get_column_info( struct tagMSIVIEW *view, UINT n, LPCWSTR *name,
 116                                     UINT *type, BOOL *temporary, LPCWSTR *table_name )
 117 {
 118     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 119
 120     TRACE("%p %d %p %p %p %p\n", dv, n, name, type, temporary, table_name );
 121
 122     if( !dv->table )
 123          return ERROR_FUNCTION_FAILED;
 124
 125     return dv->table->ops->get_column_info( dv->table, n, name,
 126                                             type, temporary, table_name);
 127 }
 128
 129 static UINT DELETE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 130                            MSIRECORD *rec, UINT row )
 131 {
 132     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 133
 134     TRACE("%p %d %p\n", dv, eModifyMode, rec );
 135
 136     return ERROR_FUNCTION_FAILED;
 137 }
 138
 139 static UINT DELETE_delete( struct tagMSIVIEW *view )
 140 {
 141     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 142
 143     TRACE("%p\n", dv );
 144
 145     if( dv->table )
 146         dv->table->ops->delete( dv->table );
 147
 148     msi_free( dv );
 149
 150     return ERROR_SUCCESS;
 151 }
 152
 153 static UINT DELETE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 154     UINT val, UINT *row, MSIITERHANDLE *handle )
 155 {
 156     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 157
 158     return ERROR_FUNCTION_FAILED;
 159 }
 160
 161
 162 static const MSIVIEWOPS delete_ops =
 163 {
 164     DELETE_fetch_int,
 165     DELETE_fetch_stream,
 166     NULL,
 167     NULL,
 168     NULL,
 169     NULL,
 170     DELETE_execute,
 171     DELETE_close,
 172     DELETE_get_dimensions,
 173     DELETE_get_column_info,
 174     DELETE_modify,
 175     DELETE_delete,
 176     DELETE_find_matching_rows,
 177     NULL,
 178     NULL,
 179     NULL,
 180     NULL,
 181     NULL,
 182     NULL,
 183 };
 184
 185 UINT DELETE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
 186 {
 187     MSIDELETEVIEW *dv = NULL;
 188
 189     TRACE("%p\n", dv );
 190
 191     dv = msi_alloc_zero( sizeof *dv );
 192     if( !dv )
 193         return ERROR_FUNCTION_FAILED;
 194
 195     /* fill the structure */
 196     dv->view.ops = &delete_ops;
 197     dv->db = db;
 198     dv->table = table;
 199
 200     *view = &dv->view;
 201
 202     return ERROR_SUCCESS;
 203 }