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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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(msidb);
/* 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 WHERE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %d %p\n", wv, row, col, stm );
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_stream( wv->table, row, col, stm );
}
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static UINT WHERE_set_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT val )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %d %04x\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->set_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;
}
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static const WCHAR *STRING_evaluate( string_table *st,
MSIVIEW *table, UINT row, struct expr *expr, MSIRECORD *record )
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{
UINT val = 0, r;
switch( expr->type )
{
case EXPR_COL_NUMBER_STRING:
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r = table->ops->fetch_int( table, row, expr->u.col_number, &val );
if( r != ERROR_SUCCESS )
return NULL;
return msi_string_lookup_id( st, val );
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case EXPR_SVAL:
return expr->u.sval;
case EXPR_WILDCARD:
return MSI_RecordGetString( record, 1 );
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default:
ERR("Invalid expression type\n");
break;
}
return NULL;
}
static UINT STRCMP_Evaluate( string_table *st, MSIVIEW *table, UINT row,
struct expr *cond, UINT *val, MSIRECORD *record )
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{
int sr;
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const WCHAR *l_str, *r_str;
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l_str = STRING_evaluate( st, table, row, cond->u.expr.left, record );
r_str = STRING_evaluate( st, table, row, cond->u.expr.right, record );
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if( l_str == r_str )
sr = 0;
else if( l_str && ! r_str )
sr = 1;
else if( r_str && ! l_str )
sr = -1;
else
sr = lstrcmpW( l_str, r_str );
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*val = ( cond->u.expr.op == OP_EQ && ( sr == 0 ) ) ||
( cond->u.expr.op == OP_LT && ( sr < 0 ) ) ||
( cond->u.expr.op == OP_GT && ( sr > 0 ) );
return ERROR_SUCCESS;
}
static UINT WHERE_evaluate( MSIDATABASE *db, MSIVIEW *table, UINT row,
struct expr *cond, UINT *val, MSIRECORD *record )
{
UINT r, lval, rval;
if( !cond )
return ERROR_SUCCESS;
switch( cond->type )
{
case EXPR_COL_NUMBER_STRING:
case EXPR_COL_NUMBER:
return table->ops->fetch_int( table, row, cond->u.col_number, val );
case EXPR_UVAL:
*val = cond->u.uval;
return ERROR_SUCCESS;
case EXPR_COMPLEX:
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r = WHERE_evaluate( db, table, row, cond->u.expr.left, &lval, record );
if( r != ERROR_SUCCESS )
return r;
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r = WHERE_evaluate( db, table, row, cond->u.expr.right, &rval, record );
if( r != ERROR_SUCCESS )
return r;
*val = INT_evaluate( lval, cond->u.expr.op, rval );
return ERROR_SUCCESS;
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case EXPR_STRCMP:
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return STRCMP_Evaluate( db->strings, table, row, cond, val, record );
case EXPR_WILDCARD:
*val = MSI_RecordGetInteger( record, 1 );
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return ERROR_SUCCESS;
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default:
ERR("Invalid expression type\n");
break;
}
return ERROR_SUCCESS;
}
static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT count = 0, r, val, i;
MSIVIEW *table = wv->table;
TRACE("%p %p\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;
msi_free( wv->reorder );
wv->reorder = msi_alloc( count*sizeof(UINT) );
if( !wv->reorder )
return ERROR_FUNCTION_FAILED;
wv->row_count = 0;
if (wv->cond->type == EXPR_STRCMP)
{
MSIITERHANDLE handle = NULL;
UINT row, value, col;
struct expr *col_cond = wv->cond->u.expr.left;
struct expr *val_cond = wv->cond->u.expr.right;
/* swap conditionals */
if (col_cond->type != EXPR_COL_NUMBER_STRING)
{
val_cond = wv->cond->u.expr.left;
col_cond = wv->cond->u.expr.right;
}
if ((col_cond->type == EXPR_COL_NUMBER_STRING) && (val_cond->type == EXPR_SVAL))
{
col = col_cond->u.col_number;
r = msi_string2idW(wv->db->strings, val_cond->u.sval, &value);
if (r != ERROR_SUCCESS)
{
TRACE("no id for %s, assuming it doesn't exist in the table\n", debugstr_w(wv->cond->u.expr.right->u.sval));
return ERROR_SUCCESS;
}
do
{
r = table->ops->find_matching_rows(table, col, value, &row, &handle);
if (r == ERROR_SUCCESS)
wv->reorder[ wv->row_count ++ ] = row;
} while (r == ERROR_SUCCESS);
if (r == ERROR_NO_MORE_ITEMS)
return ERROR_SUCCESS;
else
return r;
}
/* else fallback to slow case */
}
for( i=0; i<count; i++ )
{
val = 0;
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r = WHERE_evaluate( wv->db, table, i, wv->cond, &val, record );
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;
msi_free( 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,
MSIRECORD *rec )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %p\n", wv, eModifyMode, rec );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
return wv->table->ops->modify( wv->table, eModifyMode, rec );
}
static UINT WHERE_delete( struct tagMSIVIEW *view )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p\n", wv );
if( wv->table )
wv->table->ops->delete( wv->table );
wv->table = 0;
msi_free( wv->reorder );
wv->reorder = NULL;
wv->row_count = 0;
msiobj_release( &wv->db->hdr );
msi_free( wv );
return ERROR_SUCCESS;
}
static UINT WHERE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
UINT val, UINT *row, MSIITERHANDLE *handle )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT r;
TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
if( !wv->table )
return ERROR_FUNCTION_FAILED;
r = wv->table->ops->find_matching_rows( wv->table, col, val, row, handle );
if( *row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
*row = wv->reorder[ *row ];
return r;
}
MSIVIEWOPS where_ops =
{
WHERE_fetch_int,
WHERE_fetch_stream,
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WHERE_set_int,
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NULL,
WHERE_execute,
WHERE_close,
WHERE_get_dimensions,
WHERE_get_column_info,
WHERE_modify,
WHERE_delete,
WHERE_find_matching_rows
};
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static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
UINT *valid )
{
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UINT r, val = 0;
switch( cond->type )
{
case EXPR_COLUMN:
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r = VIEW_find_column( table, cond->u.column, &val );
if( r == ERROR_SUCCESS )
{
UINT type = 0;
r = table->ops->get_column_info( table, val, NULL, &type );
if( r == ERROR_SUCCESS )
{
if (type&MSITYPE_STRING)
cond->type = EXPR_COL_NUMBER_STRING;
else
cond->type = EXPR_COL_NUMBER;
cond->u.col_number = val;
*valid = 1;
}
else
*valid = 0;
}
else
{
*valid = 0;
ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
}
break;
case EXPR_COMPLEX:
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r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
if( r != ERROR_SUCCESS )
return r;
if( !*valid )
return ERROR_SUCCESS;
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r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
if( r != ERROR_SUCCESS )
return r;
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/* check the type of the comparison */
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if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
( cond->u.expr.right->type == EXPR_SVAL ) ||
( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
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{
switch( cond->u.expr.op )
{
case OP_EQ:
case OP_GT:
case OP_LT:
break;
default:
*valid = FALSE;
return ERROR_INVALID_PARAMETER;
}
/* FIXME: check we're comparing a string to a column */
cond->type = EXPR_STRCMP;
}
break;
case EXPR_IVAL:
*valid = 1;
cond->type = EXPR_UVAL;
cond->u.uval = cond->u.ival + (1<<15);
break;
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case EXPR_WILDCARD:
*valid = 1;
break;
case EXPR_SVAL:
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*valid = 1;
break;
default:
ERR("Invalid expression type\n");
*valid = 0;
break;
}
return ERROR_SUCCESS;
}
UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
struct expr *cond )
{
MSIWHEREVIEW *wv = NULL;
UINT count = 0, r, valid = 0;
TRACE("%p\n", table );
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
{
ERR("can't get table dimensions\n");
return r;
}
if( cond )
{
r = WHERE_VerifyCondition( db, table, cond, &valid );
if( r != ERROR_SUCCESS )
return r;
if( !valid )
return ERROR_FUNCTION_FAILED;
}
wv = msi_alloc_zero( sizeof *wv );
if( !wv )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
wv->view.ops = &where_ops;
msiobj_addref( &db->hdr );
wv->db = db;
wv->table = table;
wv->row_count = 0;
wv->reorder = NULL;
wv->cond = cond;
*view = (MSIVIEW*) wv;
return ERROR_SUCCESS;
}