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Sweden-Number/dlls/msi/where.c

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/*
* Implementation of the Microsoft Installer (msi.dll)
*
* Copyright 2002 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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(msi);
/* below is the query interface to a table */
typedef struct tagMSIWHEREVIEW
{
MSIVIEW view;
MSIDATABASE *db;
MSIVIEW *table;
UINT row_count;
UINT *reorder;
struct expr *cond;
} MSIWHEREVIEW;
static UINT WHERE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %d %p\n", wv, row, col, val );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
row = wv->reorder[ row ];
return wv->table->ops->fetch_int( wv->table, row, col, val );
}
static UINT INT_evaluate( UINT lval, UINT op, UINT rval )
{
switch( op )
{
case OP_EQ:
return ( lval == rval );
case OP_AND:
return ( lval && rval );
case OP_OR:
return ( lval || rval );
case OP_GT:
return ( lval > rval );
case OP_LT:
return ( lval < rval );
case OP_LE:
return ( lval <= rval );
case OP_GE:
return ( lval >= rval );
case OP_NE:
return ( lval != rval );
case OP_ISNULL:
return ( !lval );
case OP_NOTNULL:
return ( lval );
default:
ERR("Unknown operator %d\n", op );
}
return 0;
}
static UINT WHERE_evaluate( MSIVIEW *table, UINT row,
struct expr *cond, UINT *val )
{
UINT r, lval, rval;
if( !cond )
return ERROR_SUCCESS;
switch( cond->type )
{
case EXPR_COL_NUMBER:
return table->ops->fetch_int( table, row, cond->u.col_number, val );
/* case EXPR_IVAL:
*val = cond->u.ival;
return ERROR_SUCCESS; */
case EXPR_UVAL:
*val = cond->u.uval;
return ERROR_SUCCESS;
case EXPR_COMPLEX:
r = WHERE_evaluate( table, row, cond->u.expr.left, &lval );
if( r != ERROR_SUCCESS )
return r;
r = WHERE_evaluate( table, row, cond->u.expr.right, &rval );
if( r != ERROR_SUCCESS )
return r;
*val = INT_evaluate( lval, cond->u.expr.op, rval );
return ERROR_SUCCESS;
default:
ERR("Invalid expression type\n");
break;
}
return ERROR_SUCCESS;
}
static UINT WHERE_execute( struct tagMSIVIEW *view, MSIHANDLE record )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT count = 0, r, val, i;
MSIVIEW *table = wv->table;
TRACE("%p %ld\n", wv, record);
if( !table )
return ERROR_FUNCTION_FAILED;
r = table->ops->execute( table, record );
if( r != ERROR_SUCCESS )
return r;
r = table->ops->get_dimensions( table, &count, NULL );
if( r != ERROR_SUCCESS )
return r;
wv->reorder = HeapAlloc( GetProcessHeap(), 0, count*sizeof(UINT) );
if( !wv->reorder )
return ERROR_FUNCTION_FAILED;
for( i=0; i<count; i++ )
{
val = 0;
r = WHERE_evaluate( table, i, wv->cond, &val );
if( r != ERROR_SUCCESS )
return r;
if( val )
wv->reorder[ wv->row_count ++ ] = i;
}
return ERROR_SUCCESS;
}
static UINT WHERE_close( struct tagMSIVIEW *view )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p\n", wv );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( wv->reorder )
HeapFree( GetProcessHeap(), 0, wv->reorder );
wv->reorder = NULL;
return wv->table->ops->close( wv->table );
}
static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %p %p\n", wv, rows, cols );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( rows )
{
if( !wv->reorder )
return ERROR_FUNCTION_FAILED;
*rows = wv->row_count;
}
return wv->table->ops->get_dimensions( wv->table, NULL, cols );
}
static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
UINT n, LPWSTR *name, UINT *type )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %p %p\n", wv, n, name, type );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
return wv->table->ops->get_column_info( wv->table, n, name, type );
}
static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode, MSIHANDLE hrec)
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %ld\n", wv, eModifyMode, hrec );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
return wv->table->ops->modify( wv->table, eModifyMode, hrec );
}
static void WHERE_delete_expr( struct expr *e )
{
if( !e )
return;
if( e->type == EXPR_COMPLEX )
{
WHERE_delete_expr( e->u.expr.left );
WHERE_delete_expr( e->u.expr.right );
}
HeapFree( GetProcessHeap(), 0, e );
}
static UINT WHERE_delete( struct tagMSIVIEW *view )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p\n", wv );
if( wv->table )
wv->table->ops->delete( wv->table );
if( wv->reorder )
HeapFree( GetProcessHeap(), 0, wv->reorder );
wv->reorder = NULL;
wv->row_count = 0;
WHERE_delete_expr( wv->cond );
HeapFree( GetProcessHeap(), 0, wv );
return ERROR_SUCCESS;
}
MSIVIEWOPS where_ops =
{
WHERE_fetch_int,
WHERE_execute,
WHERE_close,
WHERE_get_dimensions,
WHERE_get_column_info,
WHERE_modify,
WHERE_delete
};
UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
{
MSIWHEREVIEW *wv = NULL;
UINT count = 0, r;
TRACE("%p\n", wv );
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
{
ERR("can't get table dimensions\n");
return r;
}
wv = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof *wv );
if( !wv )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
wv->view.ops = &where_ops;
wv->db = db;
wv->table = table;
wv->row_count = 0;
wv->reorder = NULL;
*view = (MSIVIEW*) wv;
return ERROR_SUCCESS;
}
static UINT WHERE_VerifyCondition( MSIVIEW *table, struct expr *cond,
UINT *valid )
{
UINT r, col = 0;
switch( cond->type )
{
case EXPR_COLUMN:
r = VIEW_find_column( table, cond->u.column, &col );
if( r == ERROR_SUCCESS )
{
*valid = 1;
cond->type = EXPR_COL_NUMBER;
cond->u.col_number = col;
}
else
{
*valid = 0;
ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
}
break;
case EXPR_COMPLEX:
r = WHERE_VerifyCondition( table, cond->u.expr.left, valid );
if( r != ERROR_SUCCESS )
return r;
if( !*valid )
return ERROR_SUCCESS;
r = WHERE_VerifyCondition( table, cond->u.expr.right, valid );
if( r != ERROR_SUCCESS )
return r;
break;
case EXPR_IVAL:
*valid = 1;
cond->type = EXPR_UVAL;
cond->u.uval = cond->u.ival + (1<<15);
break;
case EXPR_SVAL:
*valid = 0;
FIXME("can't deal with string values yet\n");
break;
default:
ERR("Invalid expression type\n");
*valid = 0;
break;
}
return ERROR_SUCCESS;
}
UINT WHERE_AddCondition( MSIVIEW *view, struct expr *cond )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW *) view;
UINT r, valid = 0;
if( wv->view.ops != &where_ops )
return ERROR_FUNCTION_FAILED;
if( !wv->table )
return ERROR_INVALID_PARAMETER;
if( !cond )
return ERROR_SUCCESS;
TRACE("Adding condition\n");
r = WHERE_VerifyCondition( wv->table, cond, &valid );
if( r != ERROR_SUCCESS )
ERR("condition evaluation failed\n");
TRACE("condition is %s\n", valid ? "valid" : "invalid" );
if( !valid )
{
WHERE_delete_expr( cond );
return ERROR_FUNCTION_FAILED;
}
wv->cond = cond;
return ERROR_SUCCESS;
}
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