2 * Implementation of the Microsoft Installer (msi.dll)
4 * Copyright 2002 Mike McCormack for CodeWeavers
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.
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.
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
26 #include "wine/debug.h"
36 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
39 /* below is the query interface to a table */
41 typedef struct tagMSIWHEREVIEW
51 static UINT WHERE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
53 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
55 TRACE("%p %d %d %p\n", wv, row, col, val );
58 return ERROR_FUNCTION_FAILED;
60 if( row > wv->row_count )
61 return ERROR_NO_MORE_ITEMS;
63 row = wv->reorder[ row ];
65 return wv->table->ops->fetch_int( wv->table, row, col, val );
68 static UINT WHERE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm )
70 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
72 TRACE("%p %d %d %p\n", wv, row, col, stm );
75 return ERROR_FUNCTION_FAILED;
77 if( row > wv->row_count )
78 return ERROR_NO_MORE_ITEMS;
80 row = wv->reorder[ row ];
82 return wv->table->ops->fetch_stream( wv->table, row, col, stm );
85 static UINT WHERE_set_row( struct tagMSIVIEW *view, UINT row, MSIRECORD *rec, UINT mask )
87 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
89 TRACE("%p %d %p %08x\n", wv, row, rec, mask );
92 return ERROR_FUNCTION_FAILED;
94 if( row > wv->row_count )
95 return ERROR_NO_MORE_ITEMS;
97 row = wv->reorder[ row ];
99 return wv->table->ops->set_row( wv->table, row, rec, mask );
102 static INT INT_evaluate_binary( INT lval, UINT op, INT rval )
107 return ( lval == rval );
109 return ( lval && rval );
111 return ( lval || rval );
113 return ( lval > rval );
115 return ( lval < rval );
117 return ( lval <= rval );
119 return ( lval >= rval );
121 return ( lval != rval );
123 ERR("Unknown operator %d\n", op );
128 static INT INT_evaluate_unary( INT lval, UINT op )
137 ERR("Unknown operator %d\n", op );
142 static const WCHAR *STRING_evaluate( const string_table *st,
143 MSIVIEW *table, UINT row, const struct expr *expr, const MSIRECORD *record )
149 case EXPR_COL_NUMBER_STRING:
150 r = table->ops->fetch_int( table, row, expr->u.col_number, &val );
151 if( r != ERROR_SUCCESS )
153 return msi_string_lookup_id( st, val );
159 return MSI_RecordGetString( record, 1 );
162 ERR("Invalid expression type\n");
168 static UINT STRCMP_Evaluate( const string_table *st, MSIVIEW *table, UINT row,
169 const struct expr *cond, INT *val, const MSIRECORD *record )
172 const WCHAR *l_str, *r_str;
174 l_str = STRING_evaluate( st, table, row, cond->u.expr.left, record );
175 r_str = STRING_evaluate( st, table, row, cond->u.expr.right, record );
178 else if( l_str && ! r_str )
180 else if( r_str && ! l_str )
183 sr = lstrcmpW( l_str, r_str );
185 *val = ( cond->u.expr.op == OP_EQ && ( sr == 0 ) ) ||
186 ( cond->u.expr.op == OP_LT && ( sr < 0 ) ) ||
187 ( cond->u.expr.op == OP_GT && ( sr > 0 ) );
189 return ERROR_SUCCESS;
192 static UINT WHERE_evaluate( MSIDATABASE *db, MSIVIEW *table, UINT row,
193 const struct expr *cond, INT *val, MSIRECORD *record )
199 return ERROR_SUCCESS;
203 case EXPR_COL_NUMBER:
204 r = table->ops->fetch_int( table, row, cond->u.col_number, &tval );
205 *val = tval - 0x8000;
206 return ERROR_SUCCESS;
208 case EXPR_COL_NUMBER32:
209 r = table->ops->fetch_int( table, row, cond->u.col_number, &tval );
210 *val = tval - 0x80000000;
215 return ERROR_SUCCESS;
218 r = WHERE_evaluate( db, table, row, cond->u.expr.left, &lval, record );
219 if( r != ERROR_SUCCESS )
221 r = WHERE_evaluate( db, table, row, cond->u.expr.right, &rval, record );
222 if( r != ERROR_SUCCESS )
224 *val = INT_evaluate_binary( lval, cond->u.expr.op, rval );
225 return ERROR_SUCCESS;
228 r = table->ops->fetch_int( table, row, cond->u.expr.left->u.col_number, &tval );
229 if( r != ERROR_SUCCESS )
231 *val = INT_evaluate_unary( tval, cond->u.expr.op );
232 return ERROR_SUCCESS;
235 return STRCMP_Evaluate( db->strings, table, row, cond, val, record );
238 *val = MSI_RecordGetInteger( record, 1 );
239 return ERROR_SUCCESS;
242 ERR("Invalid expression type\n");
246 return ERROR_SUCCESS;
250 static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
252 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
253 UINT count = 0, r, i;
255 MSIVIEW *table = wv->table;
257 TRACE("%p %p\n", wv, record);
260 return ERROR_FUNCTION_FAILED;
262 r = table->ops->execute( table, record );
263 if( r != ERROR_SUCCESS )
266 r = table->ops->get_dimensions( table, &count, NULL );
267 if( r != ERROR_SUCCESS )
270 msi_free( wv->reorder );
271 wv->reorder = msi_alloc( count*sizeof(UINT) );
273 return ERROR_FUNCTION_FAILED;
276 if (wv->cond->type == EXPR_STRCMP)
278 MSIITERHANDLE handle = NULL;
279 UINT row, value, col;
280 struct expr *col_cond = wv->cond->u.expr.left;
281 struct expr *val_cond = wv->cond->u.expr.right;
283 /* swap conditionals */
284 if (col_cond->type != EXPR_COL_NUMBER_STRING)
286 val_cond = wv->cond->u.expr.left;
287 col_cond = wv->cond->u.expr.right;
290 if ((col_cond->type == EXPR_COL_NUMBER_STRING) && (val_cond->type == EXPR_SVAL))
292 col = col_cond->u.col_number;
293 /* special case for "" - translate it into nil */
294 if (!val_cond->u.sval[0])
298 r = msi_string2idW(wv->db->strings, val_cond->u.sval, &value);
299 if (r != ERROR_SUCCESS)
301 TRACE("no id for %s, assuming it doesn't exist in the table\n", debugstr_w(wv->cond->u.expr.right->u.sval));
302 return ERROR_SUCCESS;
308 r = table->ops->find_matching_rows(table, col, value, &row, &handle);
309 if (r == ERROR_SUCCESS)
310 wv->reorder[ wv->row_count ++ ] = row;
311 } while (r == ERROR_SUCCESS);
313 if (r == ERROR_NO_MORE_ITEMS)
314 return ERROR_SUCCESS;
318 /* else fallback to slow case */
321 for( i=0; i<count; i++ )
324 r = WHERE_evaluate( wv->db, table, i, wv->cond, &val, record );
325 if( r != ERROR_SUCCESS )
328 wv->reorder[ wv->row_count ++ ] = i;
331 return ERROR_SUCCESS;
334 static UINT WHERE_close( struct tagMSIVIEW *view )
336 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
341 return ERROR_FUNCTION_FAILED;
343 msi_free( wv->reorder );
346 return wv->table->ops->close( wv->table );
349 static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
351 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
353 TRACE("%p %p %p\n", wv, rows, cols );
356 return ERROR_FUNCTION_FAILED;
361 return ERROR_FUNCTION_FAILED;
362 *rows = wv->row_count;
365 return wv->table->ops->get_dimensions( wv->table, NULL, cols );
368 static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
369 UINT n, LPWSTR *name, UINT *type )
371 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
373 TRACE("%p %d %p %p\n", wv, n, name, type );
376 return ERROR_FUNCTION_FAILED;
378 return wv->table->ops->get_column_info( wv->table, n, name, type );
381 static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
384 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
386 TRACE("%p %d %p\n", wv, eModifyMode, rec );
389 return ERROR_FUNCTION_FAILED;
391 return wv->table->ops->modify( wv->table, eModifyMode, rec );
394 static UINT WHERE_delete( struct tagMSIVIEW *view )
396 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
401 wv->table->ops->delete( wv->table );
404 msi_free( wv->reorder );
408 msiobj_release( &wv->db->hdr );
411 return ERROR_SUCCESS;
414 static UINT WHERE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
415 UINT val, UINT *row, MSIITERHANDLE *handle )
417 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
420 TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
423 return ERROR_FUNCTION_FAILED;
425 r = wv->table->ops->find_matching_rows( wv->table, col, val, row, handle );
427 if( *row > wv->row_count )
428 return ERROR_NO_MORE_ITEMS;
430 *row = wv->reorder[ *row ];
436 static const MSIVIEWOPS where_ops =
445 WHERE_get_dimensions,
446 WHERE_get_column_info,
449 WHERE_find_matching_rows
452 static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
460 r = VIEW_find_column( table, cond->u.column, &val );
461 if( r == ERROR_SUCCESS )
464 r = table->ops->get_column_info( table, val, NULL, &type );
465 if( r == ERROR_SUCCESS )
467 if (type&MSITYPE_STRING)
468 cond->type = EXPR_COL_NUMBER_STRING;
469 else if ((type&0xff) == 4)
470 cond->type = EXPR_COL_NUMBER32;
472 cond->type = EXPR_COL_NUMBER;
473 cond->u.col_number = val;
482 ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
486 r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
487 if( r != ERROR_SUCCESS )
490 return ERROR_SUCCESS;
491 r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
492 if( r != ERROR_SUCCESS )
495 /* check the type of the comparison */
496 if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
497 ( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
498 ( cond->u.expr.right->type == EXPR_SVAL ) ||
499 ( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
501 switch( cond->u.expr.op )
509 return ERROR_INVALID_PARAMETER;
512 /* FIXME: check we're comparing a string to a column */
514 cond->type = EXPR_STRCMP;
519 if ( cond->u.expr.left->type != EXPR_COLUMN )
522 return ERROR_INVALID_PARAMETER;
524 r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
525 if( r != ERROR_SUCCESS )
530 cond->type = EXPR_UVAL;
531 cond->u.uval = cond->u.ival;
540 ERR("Invalid expression type\n");
545 return ERROR_SUCCESS;
548 UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
551 MSIWHEREVIEW *wv = NULL;
552 UINT count = 0, r, valid = 0;
554 TRACE("%p\n", table );
556 r = table->ops->get_dimensions( table, NULL, &count );
557 if( r != ERROR_SUCCESS )
559 ERR("can't get table dimensions\n");
565 r = WHERE_VerifyCondition( db, table, cond, &valid );
566 if( r != ERROR_SUCCESS )
569 return ERROR_FUNCTION_FAILED;
572 wv = msi_alloc_zero( sizeof *wv );
574 return ERROR_FUNCTION_FAILED;
576 /* fill the structure */
577 wv->view.ops = &where_ops;
578 msiobj_addref( &db->hdr );
584 *view = (MSIVIEW*) wv;
586 return ERROR_SUCCESS;