1 /*
2 * Implementation of the Microsoft Installer (msi.dll)
3 *
4 * Copyright 2002 Mike McCormack for CodeWeavers
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include <stdarg.h>
22
23 #include "windef.h"
24 #include "winbase.h"
25 #include "winerror.h"
26 #include "wine/debug.h"
27 #include "msi.h"
28 #include "msiquery.h"
29 #include "objbase.h"
30 #include "objidl.h"
31 #include "msipriv.h"
32 #include "winnls.h"
33
34 #include "query.h"
35
36 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
37
38 typedef struct tagDISTINCTSET
39 {
40 UINT val;
41 UINT count;
42 UINT row;
43 struct tagDISTINCTSET *nextrow;
44 struct tagDISTINCTSET *nextcol;
45 } DISTINCTSET;
46
47 typedef struct tagMSIDISTINCTVIEW
48 {
49 MSIVIEW view;
50 MSIDATABASE *db;
51 MSIVIEW *table;
52 UINT row_count;
53 UINT *translation;
54 } MSIDISTINCTVIEW;
55
56 static DISTINCTSET ** distinct_insert( DISTINCTSET **x, UINT val, UINT row )
57 {
58 /* horrible O(n) find */
59 while( *x )
60 {
61 if( (*x)->val == val )
62 {
63 (*x)->count++;
64 return x;
65 }
66 x = &(*x)->nextrow;
67 }
68
69 /* nothing found, so add one */
70 *x = msi_alloc( sizeof (DISTINCTSET) );
71 if( *x )
72 {
73 (*x)->val = val;
74 (*x)->count = 1;
75 (*x)->row = row;
76 (*x)->nextrow = NULL;
77 (*x)->nextcol = NULL;
78 }
79 return x;
80 }
81
82 static void distinct_free( DISTINCTSET *x )
83 {
84 while( x )
85 {
86 DISTINCTSET *next = x->nextrow;
87 distinct_free( x->nextcol );
88 msi_free( x );
89 x = next;
90 }
91 }
92
93 static UINT DISTINCT_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
94 {
95 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
96
97 TRACE("%p %d %d %p\n", dv, row, col, val );
98
99 if( !dv->table )
100 return ERROR_FUNCTION_FAILED;
101
102 if( row >= dv->row_count )
103 return ERROR_INVALID_PARAMETER;
104
105 row = dv->translation[ row ];
106
107 return dv->table->ops->fetch_int( dv->table, row, col, val );
108 }
109
110 static UINT DISTINCT_execute( struct tagMSIVIEW *view, MSIRECORD *record )
111 {
112 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
113 UINT r, i, j, r_count, c_count;
114 DISTINCTSET *rowset = NULL;
115
116 TRACE("%p %p\n", dv, record);
117
118 if( !dv->table )
119 return ERROR_FUNCTION_FAILED;
120
121 r = dv->table->ops->execute( dv->table, record );
122 if( r != ERROR_SUCCESS )
123 return r;
124
125 r = dv->table->ops->get_dimensions( dv->table, &r_count, &c_count );
126 if( r != ERROR_SUCCESS )
127 return r;
128
129 dv->translation = msi_alloc( r_count*sizeof(UINT) );
130 if( !dv->translation )
131 return ERROR_FUNCTION_FAILED;
132
133 /* build it */
134 for( i=0; i<r_count; i++ )
135 {
136 DISTINCTSET **x = &rowset;
137
138 for( j=1; j<=c_count; j++ )
139 {
140 UINT val = 0;
141 r = dv->table->ops->fetch_int( dv->table, i, j, &val );
142 if( r != ERROR_SUCCESS )
143 {
144 ERR("Failed to fetch int at %d %d\n", i, j );
145 distinct_free( rowset );
146 return r;
147 }
148 x = distinct_insert( x, val, i );
149 if( !*x )
150 {
151 ERR("Failed to insert at %d %d\n", i, j );
152 distinct_free( rowset );
153 return ERROR_FUNCTION_FAILED;
154 }
155 if( j != c_count )
156 x = &(*x)->nextcol;
157 }
158
159 /* check if it was distinct and if so, include it */
160 if( (*x)->row == i )
161 {
162 TRACE("Row %d -> %d\n", dv->row_count, i);
163 dv->translation[dv->row_count++] = i;
164 }
165 }
166
167 distinct_free( rowset );
168
169 return ERROR_SUCCESS;
170 }
171
172 static UINT DISTINCT_close( struct tagMSIVIEW *view )
173 {
174 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
175
176 TRACE("%p\n", dv );
177
178 if( !dv->table )
179 return ERROR_FUNCTION_FAILED;
180
181 msi_free( dv->translation );
182 dv->translation = NULL;
183 dv->row_count = 0;
184
185 return dv->table->ops->close( dv->table );
186 }
187
188 static UINT DISTINCT_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
189 {
190 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
191
192 TRACE("%p %p %p\n", dv, rows, cols );
193
194 if( !dv->table )
195 return ERROR_FUNCTION_FAILED;
196
197 if( rows )
198 {
199 if( !dv->translation )
200 return ERROR_FUNCTION_FAILED;
201 *rows = dv->row_count;
202 }
203
204 return dv->table->ops->get_dimensions( dv->table, NULL, cols );
205 }
206
207 static UINT DISTINCT_get_column_info( struct tagMSIVIEW *view,
208 UINT n, LPWSTR *name, UINT *type, BOOL *temporary,
209 LPWSTR *table_name)
210 {
211 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
212
213 TRACE("%p %d %p %p %p %p\n", dv, n, name, type, temporary, table_name );
214
215 if( !dv->table )
216 return ERROR_FUNCTION_FAILED;
217
218 return dv->table->ops->get_column_info( dv->table, n, name,
219 type, temporary, table_name );
220 }
221
222 static UINT DISTINCT_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
223 MSIRECORD *rec, UINT row )
224 {
225 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
226
227 TRACE("%p %d %p\n", dv, eModifyMode, rec );
228
229 if( !dv->table )
230 return ERROR_FUNCTION_FAILED;
231
232 return dv->table->ops->modify( dv->table, eModifyMode, rec, row );
233 }
234
235 static UINT DISTINCT_delete( struct tagMSIVIEW *view )
236 {
237 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
238
239 TRACE("%p\n", dv );
240
241 if( dv->table )
242 dv->table->ops->delete( dv->table );
243
244 msi_free( dv->translation );
245 msiobj_release( &dv->db->hdr );
246 msi_free( dv );
247
248 return ERROR_SUCCESS;
249 }
250
251 static UINT DISTINCT_find_matching_rows( struct tagMSIVIEW *view, UINT col,
252 UINT val, UINT *row, MSIITERHANDLE *handle )
253 {
254 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
255 UINT r;
256
257 TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
258
259 if( !dv->table )
260 return ERROR_FUNCTION_FAILED;
261
262 r = dv->table->ops->find_matching_rows( dv->table, col, val, row, handle );
263
264 if( *row > dv->row_count )
265 return ERROR_NO_MORE_ITEMS;
266
267 *row = dv->translation[ *row ];
268
269 return r;
270 }
271
272 static UINT DISTINCT_sort(struct tagMSIVIEW *view, column_info *columns)
273 {
274 MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW *)view;
275
276 TRACE("%p %p\n", view, columns);
277
278 return dv->table->ops->sort( dv->table, columns );
279 }
280
281 static const MSIVIEWOPS distinct_ops =
282 {
283 DISTINCT_fetch_int,
284 NULL,
285 NULL,
286 NULL,
287 NULL,
288 NULL,
289 DISTINCT_execute,
290 DISTINCT_close,
291 DISTINCT_get_dimensions,
292 DISTINCT_get_column_info,
293 DISTINCT_modify,
294 DISTINCT_delete,
295 DISTINCT_find_matching_rows,
296 NULL,
297 NULL,
298 NULL,
299 NULL,
300 DISTINCT_sort,
301 NULL,
302 };
303
304 UINT DISTINCT_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
305 {
306 MSIDISTINCTVIEW *dv = NULL;
307 UINT count = 0, r;
308
309 TRACE("%p\n", dv );
310
311 r = table->ops->get_dimensions( table, NULL, &count );
312 if( r != ERROR_SUCCESS )
313 {
314 ERR("can't get table dimensions\n");
315 return r;
316 }
317
318 dv = msi_alloc_zero( sizeof *dv );
319 if( !dv )
320 return ERROR_FUNCTION_FAILED;
321
322 /* fill the structure */
323 dv->view.ops = &distinct_ops;
324 msiobj_addref( &db->hdr );
325 dv->db = db;
326 dv->table = table;
327 dv->translation = NULL;
328 dv->row_count = 0;
329 *view = (MSIVIEW*) dv;
330
331 return ERROR_SUCCESS;
332 }
333
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