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
52 static UINT WHERE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
54 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
56 TRACE("%p %d %d %p\n", wv, row, col, val );
59 return ERROR_FUNCTION_FAILED;
61 if( row > wv->row_count )
62 return ERROR_NO_MORE_ITEMS;
64 row = wv->reorder[ row ];
66 return wv->table->ops->fetch_int( wv->table, row, col, val );
69 static UINT WHERE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm )
71 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
73 TRACE("%p %d %d %p\n", wv, row, col, stm );
76 return ERROR_FUNCTION_FAILED;
78 if( row > wv->row_count )
79 return ERROR_NO_MORE_ITEMS;
81 row = wv->reorder[ row ];
83 return wv->table->ops->fetch_stream( wv->table, row, col, stm );
86 static UINT WHERE_get_row( struct tagMSIVIEW *view, UINT row, MSIRECORD **rec )
88 MSIWHEREVIEW *wv = (MSIWHEREVIEW *)view;
90 TRACE("%p %d %p\n", wv, row, rec );
93 return ERROR_FUNCTION_FAILED;
95 if (row > wv->row_count)
96 return ERROR_NO_MORE_ITEMS;
98 row = wv->reorder[row];
100 return wv->table->ops->get_row(view, row, rec);
103 static UINT WHERE_set_row( struct tagMSIVIEW *view, UINT row, MSIRECORD *rec, UINT mask )
105 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
107 TRACE("%p %d %p %08x\n", wv, row, rec, mask );
110 return ERROR_FUNCTION_FAILED;
112 if( row > wv->row_count )
113 return ERROR_NO_MORE_ITEMS;
115 row = wv->reorder[ row ];
117 return wv->table->ops->set_row( wv->table, row, rec, mask );
120 static INT INT_evaluate_binary( INT lval, UINT op, INT rval )
125 return ( lval == rval );
127 return ( lval && rval );
129 return ( lval || rval );
131 return ( lval > rval );
133 return ( lval < rval );
135 return ( lval <= rval );
137 return ( lval >= rval );
139 return ( lval != rval );
141 ERR("Unknown operator %d\n", op );
146 static INT INT_evaluate_unary( INT lval, UINT op )
155 ERR("Unknown operator %d\n", op );
160 static const WCHAR *STRING_evaluate( MSIWHEREVIEW *wv, UINT row,
161 const struct expr *expr,
162 const MSIRECORD *record )
168 case EXPR_COL_NUMBER_STRING:
169 r = wv->table->ops->fetch_int( wv->table, row, expr->u.col_number, &val );
170 if( r != ERROR_SUCCESS )
172 return msi_string_lookup_id( wv->db->strings, val );
178 return MSI_RecordGetString( record, ++wv->rec_index );
181 ERR("Invalid expression type\n");
187 static UINT STRCMP_Evaluate( MSIWHEREVIEW *wv, UINT row, const struct expr *cond,
188 INT *val, const MSIRECORD *record )
191 const WCHAR *l_str, *r_str;
193 l_str = STRING_evaluate( wv, row, cond->u.expr.left, record );
194 r_str = STRING_evaluate( wv, row, cond->u.expr.right, record );
195 if( l_str == r_str ||
196 ((!l_str || !*l_str) && (!r_str || !*r_str)) )
198 else if( l_str && ! r_str )
200 else if( r_str && ! l_str )
203 sr = lstrcmpW( l_str, r_str );
205 *val = ( cond->u.expr.op == OP_EQ && ( sr == 0 ) ) ||
206 ( cond->u.expr.op == OP_LT && ( sr < 0 ) ) ||
207 ( cond->u.expr.op == OP_GT && ( sr > 0 ) );
209 return ERROR_SUCCESS;
212 static UINT WHERE_evaluate( MSIWHEREVIEW *wv, UINT row,
213 struct expr *cond, INT *val, MSIRECORD *record )
219 return ERROR_SUCCESS;
223 case EXPR_COL_NUMBER:
224 r = wv->table->ops->fetch_int( wv->table, row, cond->u.col_number, &tval );
225 *val = tval - 0x8000;
226 return ERROR_SUCCESS;
228 case EXPR_COL_NUMBER32:
229 r = wv->table->ops->fetch_int( wv->table, row, cond->u.col_number, &tval );
230 *val = tval - 0x80000000;
235 return ERROR_SUCCESS;
238 r = WHERE_evaluate( wv, row, cond->u.expr.left, &lval, record );
239 if( r != ERROR_SUCCESS )
241 r = WHERE_evaluate( wv, row, cond->u.expr.right, &rval, record );
242 if( r != ERROR_SUCCESS )
244 *val = INT_evaluate_binary( lval, cond->u.expr.op, rval );
245 return ERROR_SUCCESS;
248 r = wv->table->ops->fetch_int( wv->table, row, cond->u.expr.left->u.col_number, &tval );
249 if( r != ERROR_SUCCESS )
251 *val = INT_evaluate_unary( tval, cond->u.expr.op );
252 return ERROR_SUCCESS;
255 return STRCMP_Evaluate( wv, row, cond, val, record );
258 *val = MSI_RecordGetInteger( record, ++wv->rec_index );
259 return ERROR_SUCCESS;
262 ERR("Invalid expression type\n");
266 return ERROR_SUCCESS;
270 static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
272 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
273 UINT count = 0, r, i;
275 MSIVIEW *table = wv->table;
277 TRACE("%p %p\n", wv, record);
280 return ERROR_FUNCTION_FAILED;
282 r = table->ops->execute( table, record );
283 if( r != ERROR_SUCCESS )
286 r = table->ops->get_dimensions( table, &count, NULL );
287 if( r != ERROR_SUCCESS )
290 msi_free( wv->reorder );
291 wv->reorder = msi_alloc( count*sizeof(UINT) );
293 return ERROR_FUNCTION_FAILED;
296 if (wv->cond->type == EXPR_STRCMP)
298 MSIITERHANDLE handle = NULL;
299 UINT row, value, col;
300 struct expr *col_cond = wv->cond->u.expr.left;
301 struct expr *val_cond = wv->cond->u.expr.right;
303 /* swap conditionals */
304 if (col_cond->type != EXPR_COL_NUMBER_STRING)
306 val_cond = wv->cond->u.expr.left;
307 col_cond = wv->cond->u.expr.right;
310 if ((col_cond->type == EXPR_COL_NUMBER_STRING) && (val_cond->type == EXPR_SVAL))
312 col = col_cond->u.col_number;
313 /* special case for "" - translate it into nil */
314 if (!val_cond->u.sval[0])
318 r = msi_string2idW(wv->db->strings, val_cond->u.sval, &value);
319 if (r != ERROR_SUCCESS)
321 TRACE("no id for %s, assuming it doesn't exist in the table\n", debugstr_w(wv->cond->u.expr.right->u.sval));
322 return ERROR_SUCCESS;
328 r = table->ops->find_matching_rows(table, col, value, &row, &handle);
329 if (r == ERROR_SUCCESS)
330 wv->reorder[ wv->row_count ++ ] = row;
331 } while (r == ERROR_SUCCESS);
333 if (r == ERROR_NO_MORE_ITEMS)
334 return ERROR_SUCCESS;
338 /* else fallback to slow case */
341 for( i=0; i<count; i++ )
345 r = WHERE_evaluate( wv, i, wv->cond, &val, record );
346 if( r != ERROR_SUCCESS )
349 wv->reorder[ wv->row_count ++ ] = i;
352 return ERROR_SUCCESS;
355 static UINT WHERE_close( struct tagMSIVIEW *view )
357 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
362 return ERROR_FUNCTION_FAILED;
364 msi_free( wv->reorder );
367 return wv->table->ops->close( wv->table );
370 static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
372 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
374 TRACE("%p %p %p\n", wv, rows, cols );
377 return ERROR_FUNCTION_FAILED;
382 return ERROR_FUNCTION_FAILED;
383 *rows = wv->row_count;
386 return wv->table->ops->get_dimensions( wv->table, NULL, cols );
389 static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
390 UINT n, LPWSTR *name, UINT *type )
392 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
394 TRACE("%p %d %p %p\n", wv, n, name, type );
397 return ERROR_FUNCTION_FAILED;
399 return wv->table->ops->get_column_info( wv->table, n, name, type );
402 static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
403 MSIRECORD *rec, UINT row )
405 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
407 TRACE("%p %d %p\n", wv, eModifyMode, rec );
410 return ERROR_FUNCTION_FAILED;
412 return wv->table->ops->modify( wv->table, eModifyMode, rec, row );
415 static UINT WHERE_delete( struct tagMSIVIEW *view )
417 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
422 wv->table->ops->delete( wv->table );
425 msi_free( wv->reorder );
429 msiobj_release( &wv->db->hdr );
432 return ERROR_SUCCESS;
435 static UINT WHERE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
436 UINT val, UINT *row, MSIITERHANDLE *handle )
438 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
441 TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
444 return ERROR_FUNCTION_FAILED;
446 r = wv->table->ops->find_matching_rows( wv->table, col, val, row, handle );
448 if( *row > wv->row_count )
449 return ERROR_NO_MORE_ITEMS;
451 *row = wv->reorder[ *row ];
457 static const MSIVIEWOPS where_ops =
467 WHERE_get_dimensions,
468 WHERE_get_column_info,
471 WHERE_find_matching_rows,
478 static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
486 r = VIEW_find_column( table, cond->u.column, &val );
487 if( r == ERROR_SUCCESS )
490 r = table->ops->get_column_info( table, val, NULL, &type );
491 if( r == ERROR_SUCCESS )
493 if (type&MSITYPE_STRING)
494 cond->type = EXPR_COL_NUMBER_STRING;
495 else if ((type&0xff) == 4)
496 cond->type = EXPR_COL_NUMBER32;
498 cond->type = EXPR_COL_NUMBER;
499 cond->u.col_number = val;
508 ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
512 r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
513 if( r != ERROR_SUCCESS )
516 return ERROR_SUCCESS;
517 r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
518 if( r != ERROR_SUCCESS )
521 /* check the type of the comparison */
522 if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
523 ( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
524 ( cond->u.expr.right->type == EXPR_SVAL ) ||
525 ( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
527 switch( cond->u.expr.op )
535 return ERROR_INVALID_PARAMETER;
538 /* FIXME: check we're comparing a string to a column */
540 cond->type = EXPR_STRCMP;
545 if ( cond->u.expr.left->type != EXPR_COLUMN )
548 return ERROR_INVALID_PARAMETER;
550 r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
551 if( r != ERROR_SUCCESS )
556 cond->type = EXPR_UVAL;
557 cond->u.uval = cond->u.ival;
566 ERR("Invalid expression type\n");
571 return ERROR_SUCCESS;
574 UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
577 MSIWHEREVIEW *wv = NULL;
578 UINT count = 0, r, valid = 0;
580 TRACE("%p\n", table );
582 r = table->ops->get_dimensions( table, NULL, &count );
583 if( r != ERROR_SUCCESS )
585 ERR("can't get table dimensions\n");
591 r = WHERE_VerifyCondition( db, table, cond, &valid );
592 if( r != ERROR_SUCCESS )
595 return ERROR_FUNCTION_FAILED;
598 wv = msi_alloc_zero( sizeof *wv );
600 return ERROR_FUNCTION_FAILED;
602 /* fill the structure */
603 wv->view.ops = &where_ops;
604 msiobj_addref( &db->hdr );
611 *view = (MSIVIEW*) wv;
613 return ERROR_SUCCESS;