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/*
* 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 "debug.h"
#include "libmsi.h"
#include "msipriv.h"
#include "query.h"
/*
* 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 _LibmsiDeleteView
{
LibmsiView view;
LibmsiDatabase *db;
LibmsiView *table;
} LibmsiDeleteView;
static unsigned delete_view_fetch_int( LibmsiView *view, unsigned row, unsigned col, unsigned *val )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p %d %d %p\n", dv, row, col, val );
return LIBMSI_RESULT_FUNCTION_FAILED;
}
static unsigned delete_view_fetch_stream( LibmsiView *view, unsigned row, unsigned col, GsfInput **stm)
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p %d %d %p\n", dv, row, col, stm );
return LIBMSI_RESULT_FUNCTION_FAILED;
}
static unsigned delete_view_execute( LibmsiView *view, LibmsiRecord *record )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
unsigned r, i, rows = 0, cols = 0;
TRACE("%p %p\n", dv, record);
if( !dv->table )
return LIBMSI_RESULT_FUNCTION_FAILED;
r = dv->table->ops->execute( dv->table, record );
if( r != LIBMSI_RESULT_SUCCESS )
return r;
r = dv->table->ops->get_dimensions( dv->table, &rows, &cols );
if( r != LIBMSI_RESULT_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 LIBMSI_RESULT_SUCCESS;
}
static unsigned delete_view_close( LibmsiView *view )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p\n", dv );
if( !dv->table )
return LIBMSI_RESULT_FUNCTION_FAILED;
return dv->table->ops->close( dv->table );
}
static unsigned delete_view_get_dimensions( LibmsiView *view, unsigned *rows, unsigned *cols )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p %p %p\n", dv, rows, cols );
if( !dv->table )
return LIBMSI_RESULT_FUNCTION_FAILED;
*rows = 0;
return dv->table->ops->get_dimensions( dv->table, NULL, cols );
}
static unsigned delete_view_get_column_info( LibmsiView *view, unsigned n, const char **name,
unsigned *type, bool *temporary, const char **table_name )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p %d %p %p %p %p\n", dv, n, name, type, temporary, table_name );
if( !dv->table )
return LIBMSI_RESULT_FUNCTION_FAILED;
return dv->table->ops->get_column_info( dv->table, n, name,
type, temporary, table_name);
}
static unsigned delete_view_delete( LibmsiView *view )
{
LibmsiDeleteView *dv = (LibmsiDeleteView*)view;
TRACE("%p\n", dv );
if( dv->table )
dv->table->ops->delete( dv->table );
msi_free( dv );
return LIBMSI_RESULT_SUCCESS;
}
static unsigned delete_view_find_matching_rows( LibmsiView *view, unsigned col,
unsigned val, unsigned *row, MSIITERHANDLE *handle )
{
TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
return LIBMSI_RESULT_FUNCTION_FAILED;
}
static const LibmsiViewOps delete_ops =
{
delete_view_fetch_int,
delete_view_fetch_stream,
NULL,
NULL,
NULL,
NULL,
delete_view_execute,
delete_view_close,
delete_view_get_dimensions,
delete_view_get_column_info,
delete_view_delete,
delete_view_find_matching_rows,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
unsigned delete_view_create( LibmsiDatabase *db, LibmsiView **view, LibmsiView *table )
{
LibmsiDeleteView *dv = NULL;
TRACE("%p\n", dv );
dv = msi_alloc_zero( sizeof *dv );
if( !dv )
return LIBMSI_RESULT_FUNCTION_FAILED;
/* fill the structure */
dv->view.ops = &delete_ops;
dv->db = db;
dv->table = table;
*view = &dv->view;
return LIBMSI_RESULT_SUCCESS;
}
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