dlls/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 <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winerror.h"
  26 #include "wine/debug.h"
  27 #include "msi.h"
  28 #include "msiquery.h"
  29 #include "objbase.h"
  30 #include "objidl.h"
  31 #include "msipriv.h"
  32 #include "winnls.h"
  33
  34 #include "query.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
  37
  38
  39 /*
  40  * Code to delete rows from a table.
  41  *
  42  * We delete rows by blanking them out rather than trying to remove the row.
  43  * This appears to be what the native MSI does (or tries to do). For the query:
  44  *
  45  * delete from Property
  46  *
  47  * some non-zero entries are left in the table by native MSI.  I'm not sure if
  48  * that's a bug in the way I'm running the query, or a just a bug.
  49  */
  50
  51 typedef struct tagMSIDELETEVIEW
  52 {
  53     MSIVIEW        view;
  54     MSIDATABASE   *db;
  55     MSIVIEW       *table;
  56 } MSIDELETEVIEW;
  57
  58 static UINT DELETE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  59 {
  60     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  61
  62     TRACE("%p %d %d %p\n", dv, row, col, val );
  63
  64     return ERROR_FUNCTION_FAILED;
  65 }
  66
  67 static UINT DELETE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
  68 {
  69     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  70
  71     TRACE("%p %d %d %p\n", dv, row, col, stm );
  72
  73     return ERROR_FUNCTION_FAILED;
  74 }
  75
  76 static UINT DELETE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
  77 {
  78     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  79     UINT r, i, rows = 0, cols = 0;
  80     MSIRECORD *empty;
  81
  82     TRACE("%p %p\n", dv, record);
  83
  84     if( !dv->table )
  85          return ERROR_FUNCTION_FAILED;
  86
  87     r = dv->table->ops->execute( dv->table, record );
  88     if( r != ERROR_SUCCESS )
  89         return r;
  90
  91     r = dv->table->ops->get_dimensions( dv->table, &rows, &cols );
  92     if( r != ERROR_SUCCESS )
  93         return r;
  94
  95     TRACE("blanking %d rows\n", rows);
  96
  97     empty = MSI_CreateRecord( cols );
  98     if (!empty)
  99         return ERROR_FUNCTION_FAILED;
 100
 101     /* blank out all the rows that match */
 102     for ( i=0; i<rows; i++ )
 103         dv->table->ops->set_row( dv->table, i, empty, (1<<cols)-1 );
 104
 105     msiobj_release( &empty->hdr );
 106
 107     return ERROR_SUCCESS;
 108 }
 109
 110 static UINT DELETE_close( struct tagMSIVIEW *view )
 111 {
 112     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 113
 114     TRACE("%p\n", dv );
 115
 116     if( !dv->table )
 117          return ERROR_FUNCTION_FAILED;
 118
 119     return dv->table->ops->close( dv->table );
 120 }
 121
 122 static UINT DELETE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 123 {
 124     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 125
 126     TRACE("%p %p %p\n", dv, rows, cols );
 127
 128     if( !dv->table )
 129          return ERROR_FUNCTION_FAILED;
 130
 131     *rows = 0;
 132
 133     return dv->table->ops->get_dimensions( dv->table, NULL, cols );
 134 }
 135
 136 static UINT DELETE_get_column_info( struct tagMSIVIEW *view,
 137                 UINT n, LPWSTR *name, UINT *type )
 138 {
 139     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 140
 141     TRACE("%p %d %p %p\n", dv, n, name, type );
 142
 143     if( !dv->table )
 144          return ERROR_FUNCTION_FAILED;
 145
 146     return dv->table->ops->get_column_info( dv->table, n, name, type );
 147 }
 148
 149 static UINT DELETE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 150                 MSIRECORD *rec )
 151 {
 152     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 153
 154     TRACE("%p %d %p\n", dv, eModifyMode, rec );
 155
 156     return ERROR_FUNCTION_FAILED;
 157 }
 158
 159 static UINT DELETE_delete( struct tagMSIVIEW *view )
 160 {
 161     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 162
 163     TRACE("%p\n", dv );
 164
 165     if( dv->table )
 166         dv->table->ops->delete( dv->table );
 167
 168     msi_free( dv );
 169
 170     return ERROR_SUCCESS;
 171 }
 172
 173 static UINT DELETE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 174     UINT val, UINT *row, MSIITERHANDLE *handle )
 175 {
 176     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 177
 178     return ERROR_FUNCTION_FAILED;
 179 }
 180
 181
 182 static const MSIVIEWOPS delete_ops =
 183 {
 184     DELETE_fetch_int,
 185     DELETE_fetch_stream,
 186     NULL,
 187     NULL,
 188     DELETE_execute,
 189     DELETE_close,
 190     DELETE_get_dimensions,
 191     DELETE_get_column_info,
 192     DELETE_modify,
 193     DELETE_delete,
 194     DELETE_find_matching_rows
 195 };
 196
 197 UINT DELETE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
 198 {
 199     MSIDELETEVIEW *dv = NULL;
 200
 201     TRACE("%p\n", dv );
 202
 203     dv = msi_alloc_zero( sizeof *dv );
 204     if( !dv )
 205         return ERROR_FUNCTION_FAILED;
 206
 207     /* fill the structure */
 208     dv->view.ops = &delete_ops;
 209     dv->db = db;
 210     dv->table = table;
 211
 212     *view = &dv->view;
 213
 214     return ERROR_SUCCESS;
 215 }