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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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_set_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT val )
  77 {
  78     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  79
  80     TRACE("%p %d %d %04x\n", dv, row, col, val );
  81
  82     return ERROR_FUNCTION_FAILED;
  83 }
  84
  85 static UINT DELETE_insert_row( struct tagMSIVIEW *view, MSIRECORD *record )
  86 {
  87     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  88
  89     TRACE("%p %p\n", dv, record );
  90
  91     return ERROR_FUNCTION_FAILED;
  92 }
  93
  94 static UINT DELETE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
  95 {
  96     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
  97     UINT r, i, j, rows = 0, cols = 0;
  98
  99     TRACE("%p %p\n", dv, record);
 100
 101     if( !dv->table )
 102          return ERROR_FUNCTION_FAILED;
 103
 104     r = dv->table->ops->execute( dv->table, record );
 105     if( r != ERROR_SUCCESS )
 106         return r;
 107
 108     r = dv->table->ops->get_dimensions( dv->table, &rows, &cols );
 109     if( r != ERROR_SUCCESS )
 110         return r;
 111
 112     TRACE("blanking %d rows\n", rows);
 113
 114     /* blank out all the rows that match */
 115     for( i=0; i<rows; i++ )
 116         for( j=1; j<=cols; j++ )
 117             dv->table->ops->set_int( dv->table, i, j, 0 );
 118
 119     return ERROR_SUCCESS;
 120 }
 121
 122 static UINT DELETE_close( struct tagMSIVIEW *view )
 123 {
 124     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 125
 126     TRACE("%p\n", dv );
 127
 128     if( !dv->table )
 129          return ERROR_FUNCTION_FAILED;
 130
 131     return dv->table->ops->close( dv->table );
 132 }
 133
 134 static UINT DELETE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 135 {
 136     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 137
 138     TRACE("%p %p %p\n", dv, rows, cols );
 139
 140     if( !dv->table )
 141          return ERROR_FUNCTION_FAILED;
 142
 143     *rows = 0;
 144
 145     return dv->table->ops->get_dimensions( dv->table, NULL, cols );
 146 }
 147
 148 static UINT DELETE_get_column_info( struct tagMSIVIEW *view,
 149                 UINT n, LPWSTR *name, UINT *type )
 150 {
 151     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 152
 153     TRACE("%p %d %p %p\n", dv, n, name, type );
 154
 155     if( !dv->table )
 156          return ERROR_FUNCTION_FAILED;
 157
 158     return dv->table->ops->get_column_info( dv->table, n, name, type );
 159 }
 160
 161 static UINT DELETE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 162                 MSIRECORD *rec )
 163 {
 164     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 165
 166     TRACE("%p %d %p\n", dv, eModifyMode, rec );
 167
 168     return ERROR_FUNCTION_FAILED;
 169 }
 170
 171 static UINT DELETE_delete( struct tagMSIVIEW *view )
 172 {
 173     MSIDELETEVIEW *dv = (MSIDELETEVIEW*)view;
 174
 175     TRACE("%p\n", dv );
 176
 177     if( dv->table )
 178         dv->table->ops->delete( dv->table );
 179
 180     msi_free( dv );
 181
 182     return ERROR_SUCCESS;
 183 }
 184
 185
 186 MSIVIEWOPS delete_ops =
 187 {
 188     DELETE_fetch_int,
 189     DELETE_fetch_stream,
 190     DELETE_set_int,
 191     DELETE_insert_row,
 192     DELETE_execute,
 193     DELETE_close,
 194     DELETE_get_dimensions,
 195     DELETE_get_column_info,
 196     DELETE_modify,
 197     DELETE_delete
 198 };
 199
 200 UINT DELETE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
 201 {
 202     MSIDELETEVIEW *dv = NULL;
 203
 204     TRACE("%p\n", dv );
 205
 206     dv = msi_alloc_zero( sizeof *dv );
 207     if( !dv )
 208         return ERROR_FUNCTION_FAILED;
 209
 210     /* fill the structure */
 211     dv->view.ops = &delete_ops;
 212     dv->db = db;
 213     dv->table = table;
 214
 215     *view = &dv->view;
 216
 217     return ERROR_SUCCESS;
 218 }