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_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT val )
87 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
89 TRACE("%p %d %d %04x\n", wv, row, col, val );
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_int( wv->table, row, col, val );
102 static UINT INT_evaluate( UINT lval, UINT op, UINT 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 );
127 ERR("Unknown operator %d\n", op );
132 static const WCHAR *STRING_evaluate( string_table *st,
133 MSIVIEW *table, UINT row, struct expr *expr, MSIRECORD *record )
139 case EXPR_COL_NUMBER_STRING:
140 r = table->ops->fetch_int( table, row, expr->u.col_number, &val );
141 if( r != ERROR_SUCCESS )
143 return msi_string_lookup_id( st, val );
149 return MSI_RecordGetString( record, 1 );
152 ERR("Invalid expression type\n");
158 static UINT STRCMP_Evaluate( string_table *st, MSIVIEW *table, UINT row,
159 struct expr *cond, UINT *val, MSIRECORD *record )
162 const WCHAR *l_str, *r_str;
164 l_str = STRING_evaluate( st, table, row, cond->u.expr.left, record );
165 r_str = STRING_evaluate( st, table, row, cond->u.expr.right, record );
168 else if( l_str && ! r_str )
170 else if( r_str && ! l_str )
173 sr = lstrcmpW( l_str, r_str );
175 *val = ( cond->u.expr.op == OP_EQ && ( sr == 0 ) ) ||
176 ( cond->u.expr.op == OP_LT && ( sr < 0 ) ) ||
177 ( cond->u.expr.op == OP_GT && ( sr > 0 ) );
179 return ERROR_SUCCESS;
182 static UINT WHERE_evaluate( MSIDATABASE *db, MSIVIEW *table, UINT row,
183 struct expr *cond, UINT *val, MSIRECORD *record )
188 return ERROR_SUCCESS;
192 case EXPR_COL_NUMBER_STRING:
193 case EXPR_COL_NUMBER:
194 return table->ops->fetch_int( table, row, cond->u.col_number, val );
198 return ERROR_SUCCESS;
201 r = WHERE_evaluate( db, table, row, cond->u.expr.left, &lval, record );
202 if( r != ERROR_SUCCESS )
204 r = WHERE_evaluate( db, table, row, cond->u.expr.right, &rval, record );
205 if( r != ERROR_SUCCESS )
207 *val = INT_evaluate( lval, cond->u.expr.op, rval );
208 return ERROR_SUCCESS;
211 return STRCMP_Evaluate( db->strings, table, row, cond, val, record );
214 *val = MSI_RecordGetInteger( record, 1 );
215 return ERROR_SUCCESS;
218 ERR("Invalid expression type\n");
222 return ERROR_SUCCESS;
226 static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
228 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
229 UINT count = 0, r, val, i;
230 MSIVIEW *table = wv->table;
232 TRACE("%p %p\n", wv, record);
235 return ERROR_FUNCTION_FAILED;
237 r = table->ops->execute( table, record );
238 if( r != ERROR_SUCCESS )
241 r = table->ops->get_dimensions( table, &count, NULL );
242 if( r != ERROR_SUCCESS )
245 msi_free( wv->reorder );
246 wv->reorder = msi_alloc( count*sizeof(UINT) );
248 return ERROR_FUNCTION_FAILED;
251 if (wv->cond->type == EXPR_STRCMP)
253 MSIITERHANDLE handle = NULL;
254 UINT row, value, col;
255 struct expr *col_cond = wv->cond->u.expr.left;
256 struct expr *val_cond = wv->cond->u.expr.right;
258 /* swap conditionals */
259 if (col_cond->type != EXPR_COL_NUMBER_STRING)
261 val_cond = wv->cond->u.expr.left;
262 col_cond = wv->cond->u.expr.right;
265 if ((col_cond->type == EXPR_COL_NUMBER_STRING) && (val_cond->type == EXPR_SVAL))
267 col = col_cond->u.col_number;
268 /* special case for "" - translate it into nil */
269 if (!val_cond->u.sval[0])
273 r = msi_string2idW(wv->db->strings, val_cond->u.sval, &value);
274 if (r != ERROR_SUCCESS)
276 TRACE("no id for %s, assuming it doesn't exist in the table\n", debugstr_w(wv->cond->u.expr.right->u.sval));
277 return ERROR_SUCCESS;
283 r = table->ops->find_matching_rows(table, col, value, &row, &handle);
284 if (r == ERROR_SUCCESS)
285 wv->reorder[ wv->row_count ++ ] = row;
286 } while (r == ERROR_SUCCESS);
288 if (r == ERROR_NO_MORE_ITEMS)
289 return ERROR_SUCCESS;
293 /* else fallback to slow case */
296 for( i=0; i<count; i++ )
299 r = WHERE_evaluate( wv->db, table, i, wv->cond, &val, record );
300 if( r != ERROR_SUCCESS )
303 wv->reorder[ wv->row_count ++ ] = i;
306 return ERROR_SUCCESS;
309 static UINT WHERE_close( struct tagMSIVIEW *view )
311 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
316 return ERROR_FUNCTION_FAILED;
318 msi_free( wv->reorder );
321 return wv->table->ops->close( wv->table );
324 static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
326 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
328 TRACE("%p %p %p\n", wv, rows, cols );
331 return ERROR_FUNCTION_FAILED;
336 return ERROR_FUNCTION_FAILED;
337 *rows = wv->row_count;
340 return wv->table->ops->get_dimensions( wv->table, NULL, cols );
343 static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
344 UINT n, LPWSTR *name, UINT *type )
346 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
348 TRACE("%p %d %p %p\n", wv, n, name, type );
351 return ERROR_FUNCTION_FAILED;
353 return wv->table->ops->get_column_info( wv->table, n, name, type );
356 static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
359 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
361 TRACE("%p %d %p\n", wv, eModifyMode, rec );
364 return ERROR_FUNCTION_FAILED;
366 return wv->table->ops->modify( wv->table, eModifyMode, rec );
369 static UINT WHERE_delete( struct tagMSIVIEW *view )
371 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
376 wv->table->ops->delete( wv->table );
379 msi_free( wv->reorder );
383 msiobj_release( &wv->db->hdr );
386 return ERROR_SUCCESS;
389 static UINT WHERE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
390 UINT val, UINT *row, MSIITERHANDLE *handle )
392 MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
395 TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
398 return ERROR_FUNCTION_FAILED;
400 r = wv->table->ops->find_matching_rows( wv->table, col, val, row, handle );
402 if( *row > wv->row_count )
403 return ERROR_NO_MORE_ITEMS;
405 *row = wv->reorder[ *row ];
411 static const MSIVIEWOPS where_ops =
419 WHERE_get_dimensions,
420 WHERE_get_column_info,
423 WHERE_find_matching_rows
426 static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
434 r = VIEW_find_column( table, cond->u.column, &val );
435 if( r == ERROR_SUCCESS )
438 r = table->ops->get_column_info( table, val, NULL, &type );
439 if( r == ERROR_SUCCESS )
441 if (type&MSITYPE_STRING)
442 cond->type = EXPR_COL_NUMBER_STRING;
444 cond->type = EXPR_COL_NUMBER;
445 cond->u.col_number = val;
454 ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
458 r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
459 if( r != ERROR_SUCCESS )
462 return ERROR_SUCCESS;
463 r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
464 if( r != ERROR_SUCCESS )
467 /* check the type of the comparison */
468 if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
469 ( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
470 ( cond->u.expr.right->type == EXPR_SVAL ) ||
471 ( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
473 switch( cond->u.expr.op )
481 return ERROR_INVALID_PARAMETER;
484 /* FIXME: check we're comparing a string to a column */
486 cond->type = EXPR_STRCMP;
492 cond->type = EXPR_UVAL;
493 cond->u.uval = cond->u.ival + (1<<15);
502 ERR("Invalid expression type\n");
507 return ERROR_SUCCESS;
510 UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
513 MSIWHEREVIEW *wv = NULL;
514 UINT count = 0, r, valid = 0;
516 TRACE("%p\n", table );
518 r = table->ops->get_dimensions( table, NULL, &count );
519 if( r != ERROR_SUCCESS )
521 ERR("can't get table dimensions\n");
527 r = WHERE_VerifyCondition( db, table, cond, &valid );
528 if( r != ERROR_SUCCESS )
531 return ERROR_FUNCTION_FAILED;
534 wv = msi_alloc_zero( sizeof *wv );
536 return ERROR_FUNCTION_FAILED;
538 /* fill the structure */
539 wv->view.ops = &where_ops;
540 msiobj_addref( &db->hdr );
546 *view = (MSIVIEW*) wv;
548 return ERROR_SUCCESS;