2 * Implementation of the Microsoft Installer (msi.dll)
4 * Copyright 2006 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"
34 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
36 typedef struct tagMSIJOINVIEW
40 MSIVIEW *left, *right;
41 UINT left_count, right_count;
42 UINT left_key, right_key;
47 static UINT JOIN_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
49 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
52 TRACE("%p %d %d %p\n", jv, row, col, val );
54 if( !jv->left || !jv->right )
55 return ERROR_FUNCTION_FAILED;
57 if( (col==0) || (col>(jv->left_count + jv->right_count)) )
58 return ERROR_FUNCTION_FAILED;
60 if( row >= jv->pair_count )
61 return ERROR_FUNCTION_FAILED;
63 if( col <= jv->left_count )
66 row = jv->pairs[ row*2 ];
71 row = jv->pairs[ row*2 + 1 ];
72 col -= jv->left_count;
75 return table->ops->fetch_int( table, row, col, val );
78 static UINT JOIN_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
80 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
83 TRACE("%p %d %d %p\n", jv, row, col, stm );
85 if( !jv->left || !jv->right )
86 return ERROR_FUNCTION_FAILED;
88 if( (col==0) || (col>(jv->left_count + jv->right_count)) )
89 return ERROR_FUNCTION_FAILED;
91 if( row <= jv->left_count )
94 row = jv->pairs[ row*2 ];
99 row = jv->pairs[ row*2 + 1 ];
100 col -= jv->left_count;
103 return table->ops->fetch_stream( table, row, col, stm );
106 static int join_key_compare(const void *l, const void *r)
108 const UINT *left = l, *right = r;
109 if (left[1] < right[1])
111 if (left[1] == right[1])
116 static UINT join_load_key_column( MSIJOINVIEW *jv, MSIVIEW *table, UINT column,
117 UINT **pdata, UINT *pcount )
119 UINT r, i, count = 0, *data = NULL;
121 r = table->ops->get_dimensions( table, &count, NULL );
122 if( r != ERROR_SUCCESS )
128 data = msi_alloc( count * 2 * sizeof (UINT) );
130 return ERROR_SUCCESS;
132 for (i=0; i<count; i++)
135 r = table->ops->fetch_int( table, i, column, &data[i*2+1] );
136 if (r != ERROR_SUCCESS)
137 ERR("fetch data (%u,%u) failed\n", i, column);
140 qsort( data, count, 2 * sizeof (UINT), join_key_compare );
146 return ERROR_SUCCESS;
149 static UINT join_match( UINT *ldata, UINT lcount,
150 UINT *rdata, UINT rcount,
151 UINT **ppairs, UINT *ppair_count )
156 TRACE("left %u right %u\n", rcount, lcount);
158 /* there can be at most max(lcount, rcount) matches */
164 pairs = msi_alloc( n * 2 * sizeof(UINT) );
166 return ERROR_OUTOFMEMORY;
168 for (n=0, i=0, j=0; i<lcount && j<rcount; )
170 /* values match... store the row numbers */
171 if (ldata[i*2+1] == rdata[j*2+1])
173 pairs[n*2] = ldata[i*2];
174 pairs[n*2+1] = rdata[j*2];
177 if ( ldata[i*2+3] < rdata[j*2+3])
183 /* values differ... move along */
184 else if (ldata[i*2+1] < rdata[j*2+1])
193 return ERROR_SUCCESS;
196 static UINT JOIN_execute( struct tagMSIVIEW *view, MSIRECORD *record )
198 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
199 UINT r, *ldata = NULL, *rdata = NULL, lcount = 0, rcount = 0;
201 TRACE("%p %p\n", jv, record);
203 if( !jv->left || !jv->right )
204 return ERROR_FUNCTION_FAILED;
206 r = jv->left->ops->execute( jv->left, NULL );
207 if (r != ERROR_SUCCESS)
210 r = jv->right->ops->execute( jv->right, NULL );
211 if (r != ERROR_SUCCESS)
214 r = join_load_key_column( jv, jv->left, jv->left_key, &ldata, &lcount );
215 if (r != ERROR_SUCCESS)
218 r = join_load_key_column( jv, jv->right, jv->right_key, &rdata, &rcount );
219 if (r != ERROR_SUCCESS)
222 r = join_match( ldata, lcount, rdata, rcount, &jv->pairs, &jv->pair_count );
231 static UINT JOIN_close( struct tagMSIVIEW *view )
233 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
237 if( !jv->left || !jv->right )
238 return ERROR_FUNCTION_FAILED;
240 jv->left->ops->close( jv->left );
241 jv->right->ops->close( jv->right );
243 return ERROR_SUCCESS;
246 static UINT JOIN_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
248 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
250 TRACE("%p %p %p\n", jv, rows, cols );
253 *cols = jv->left_count + jv->right_count;
257 if( !jv->left || !jv->right )
258 return ERROR_FUNCTION_FAILED;
260 *rows = jv->pair_count;
263 return ERROR_SUCCESS;
266 static UINT JOIN_get_column_info( struct tagMSIVIEW *view,
267 UINT n, LPWSTR *name, UINT *type )
269 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
271 TRACE("%p %d %p %p\n", jv, n, name, type );
273 if( !jv->left || !jv->right )
274 return ERROR_FUNCTION_FAILED;
276 if( (n==0) || (n>(jv->left_count + jv->right_count)) )
277 return ERROR_FUNCTION_FAILED;
279 if( n <= jv->left_count )
280 return jv->left->ops->get_column_info( jv->left, n, name, type );
282 n = n - jv->left_count;
284 return jv->right->ops->get_column_info( jv->right, n, name, type );
287 static UINT JOIN_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
290 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
292 TRACE("%p %d %p\n", jv, eModifyMode, rec );
294 return ERROR_FUNCTION_FAILED;
297 static UINT JOIN_delete( struct tagMSIVIEW *view )
299 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
304 jv->left->ops->delete( jv->left );
308 jv->right->ops->delete( jv->right );
311 msi_free( jv->pairs );
316 return ERROR_SUCCESS;
319 static UINT JOIN_find_matching_rows( struct tagMSIVIEW *view, UINT col,
320 UINT val, UINT *row, MSIITERHANDLE *handle )
322 MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
324 FIXME("%p, %d, %u, %p\n", jv, col, val, *handle);
326 return ERROR_FUNCTION_FAILED;
329 static const MSIVIEWOPS join_ops =
338 JOIN_get_column_info,
341 JOIN_find_matching_rows
345 * join_check_condition
347 * This is probably overly strict about what kind of condition we need
350 static UINT join_check_condition(MSIJOINVIEW *jv, struct expr *cond)
354 /* assume that we have `KeyColumn` = `SubkeyColumn` */
355 if ( cond->type != EXPR_COMPLEX )
356 return ERROR_FUNCTION_FAILED;
358 if ( cond->u.expr.op != OP_EQ )
359 return ERROR_FUNCTION_FAILED;
361 if ( cond->u.expr.left->type != EXPR_COLUMN )
362 return ERROR_FUNCTION_FAILED;
364 if ( cond->u.expr.right->type != EXPR_COLUMN )
365 return ERROR_FUNCTION_FAILED;
367 /* make sure both columns exist */
368 r = VIEW_find_column( jv->left, cond->u.expr.left->u.column, &jv->left_key );
369 if (r != ERROR_SUCCESS)
370 return ERROR_FUNCTION_FAILED;
372 r = VIEW_find_column( jv->right, cond->u.expr.right->u.column, &jv->right_key );
373 if (r != ERROR_SUCCESS)
374 return ERROR_FUNCTION_FAILED;
376 TRACE("left %s (%u) right %s (%u)\n",
377 debugstr_w(cond->u.expr.left->u.column), jv->left_key,
378 debugstr_w(cond->u.expr.right->u.column), jv->right_key);
380 return ERROR_SUCCESS;
383 UINT JOIN_CreateView( MSIDATABASE *db, MSIVIEW **view,
384 LPCWSTR left, LPCWSTR right,
387 MSIJOINVIEW *jv = NULL;
388 UINT r = ERROR_SUCCESS;
390 TRACE("%p (%s,%s)\n", jv, debugstr_w(left), debugstr_w(right) );
392 jv = msi_alloc_zero( sizeof *jv );
394 return ERROR_FUNCTION_FAILED;
396 /* fill the structure */
397 jv->view.ops = &join_ops;
400 /* create the tables to join */
401 r = TABLE_CreateView( db, left, &jv->left );
402 if( r != ERROR_SUCCESS )
404 ERR("can't create left table\n");
408 r = TABLE_CreateView( db, right, &jv->right );
409 if( r != ERROR_SUCCESS )
411 ERR("can't create right table\n");
415 /* get the number of columns in each table */
416 r = jv->left->ops->get_dimensions( jv->left, NULL, &jv->left_count );
417 if( r != ERROR_SUCCESS )
419 ERR("can't get left table dimensions\n");
423 r = jv->right->ops->get_dimensions( jv->right, NULL, &jv->right_count );
424 if( r != ERROR_SUCCESS )
426 ERR("can't get right table dimensions\n");
430 r = join_check_condition( jv, cond );
431 if( r != ERROR_SUCCESS )
433 ERR("can't get join condition\n");
438 return ERROR_SUCCESS;
441 jv->view.ops->delete( &jv->view );