dlls/msi/join.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2006 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 "msi.h"
  27 #include "msiquery.h"
  28 #include "objbase.h"
  29 #include "objidl.h"
  30 #include "msipriv.h"
  31 #include "query.h"
  32
  33 #include "wine/debug.h"
  34 #include "wine/unicode.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
  37
  38 typedef struct tagJOINTABLE
  39 {
  40     struct list entry;
  41     MSIVIEW *view;
  42     UINT columns;
  43     UINT rows;
  44     UINT next_rows;
  45 } JOINTABLE;
  46
  47 typedef struct tagMSIJOINVIEW
  48 {
  49     MSIVIEW        view;
  50     MSIDATABASE   *db;
  51     struct list    tables;
  52     UINT           columns;
  53     UINT           rows;
  54 } MSIJOINVIEW;
  55
  56 static UINT JOIN_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  57 {
  58     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
  59     JOINTABLE *table;
  60     UINT cols = 0;
  61     UINT prev_rows = 1;
  62
  63     TRACE("%d, %d\n", row, col);
  64
  65     if (col == 0 || col > jv->columns)
  66          return ERROR_FUNCTION_FAILED;
  67
  68     if (row >= jv->rows)
  69          return ERROR_FUNCTION_FAILED;
  70
  71     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
  72     {
  73         if (col <= cols + table->columns)
  74         {
  75             row = (row % (jv->rows / table->next_rows)) / prev_rows;
  76             col -= cols;
  77             break;
  78         }
  79
  80         prev_rows *= table->rows;
  81         cols += table->columns;
  82     }
  83
  84     return table->view->ops->fetch_int( table->view, row, col, val );
  85 }
  86
  87 static UINT JOIN_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
  88 {
  89     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
  90     JOINTABLE *table;
  91     UINT cols = 0;
  92     UINT prev_rows = 1;
  93
  94     TRACE("%p %d %d %p\n", jv, row, col, stm );
  95
  96     if (col == 0 || col > jv->columns)
  97          return ERROR_FUNCTION_FAILED;
  98
  99     if (row >= jv->rows)
 100          return ERROR_FUNCTION_FAILED;
 101
 102     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 103     {
 104         if (col <= cols + table->columns)
 105         {
 106             row = (row % (jv->rows / table->next_rows)) / prev_rows;
 107             col -= cols;
 108             break;
 109         }
 110
 111         prev_rows *= table->rows;
 112         cols += table->columns;
 113     }
 114
 115     return table->view->ops->fetch_stream( table->view, row, col, stm );
 116 }
 117
 118 static UINT JOIN_get_row( struct tagMSIVIEW *view, UINT row, MSIRECORD **rec )
 119 {
 120     FIXME("(%p, %d, %p): stub!\n", view, row, rec);
 121     return ERROR_FUNCTION_FAILED;
 122 }
 123
 124 static UINT JOIN_execute( struct tagMSIVIEW *view, MSIRECORD *record )
 125 {
 126     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 127     JOINTABLE *table;
 128     UINT r, rows;
 129
 130     TRACE("%p %p\n", jv, record);
 131
 132     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 133     {
 134         table->view->ops->execute(table->view, NULL);
 135
 136         r = table->view->ops->get_dimensions(table->view, &table->rows, NULL);
 137         if (r != ERROR_SUCCESS)
 138         {
 139             ERR("failed to get table dimensions\n");
 140             return r;
 141         }
 142
 143         /* each table must have at least one row */
 144         if (table->rows == 0)
 145         {
 146             jv->rows = 0;
 147             return ERROR_SUCCESS;
 148         }
 149
 150         if (jv->rows == 0)
 151             jv->rows = table->rows;
 152         else
 153             jv->rows *= table->rows;
 154     }
 155
 156     rows = jv->rows;
 157     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 158     {
 159         rows /= table->rows;
 160         table->next_rows = rows;
 161     }
 162
 163     return ERROR_SUCCESS;
 164 }
 165
 166 static UINT JOIN_close( struct tagMSIVIEW *view )
 167 {
 168     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 169     JOINTABLE *table;
 170
 171     TRACE("%p\n", jv );
 172
 173     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 174     {
 175         table->view->ops->close(table->view);
 176     }
 177
 178     return ERROR_SUCCESS;
 179 }
 180
 181 static UINT JOIN_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 182 {
 183     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 184
 185     TRACE("%p %p %p\n", jv, rows, cols );
 186
 187     if (cols)
 188         *cols = jv->columns;
 189
 190     if (rows)
 191         *rows = jv->rows;
 192
 193     return ERROR_SUCCESS;
 194 }
 195
 196 static UINT JOIN_get_column_info( struct tagMSIVIEW *view,
 197                 UINT n, LPWSTR *name, UINT *type, BOOL *temporary )
 198 {
 199     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 200     JOINTABLE *table;
 201     UINT cols = 0;
 202
 203     TRACE("%p %d %p %p %p\n", jv, n, name, type, temporary );
 204
 205     if (n == 0 || n > jv->columns)
 206         return ERROR_FUNCTION_FAILED;
 207
 208     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 209     {
 210         if (n <= cols + table->columns)
 211             return table->view->ops->get_column_info(table->view, n - cols,
 212                                                      name, type, temporary);
 213
 214         cols += table->columns;
 215     }
 216
 217     return ERROR_FUNCTION_FAILED;
 218 }
 219
 220 static UINT JOIN_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 221                          MSIRECORD *rec, UINT row )
 222 {
 223     TRACE("%p %d %p\n", view, eModifyMode, rec);
 224     return ERROR_FUNCTION_FAILED;
 225 }
 226
 227 static UINT JOIN_delete( struct tagMSIVIEW *view )
 228 {
 229     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 230     JOINTABLE *table;
 231
 232     TRACE("%p\n", jv );
 233
 234     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 235     {
 236         table->view->ops->delete(table->view);
 237         table->view = NULL;
 238     }
 239
 240     msi_free(jv);
 241
 242     return ERROR_SUCCESS;
 243 }
 244
 245 static UINT JOIN_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 246     UINT val, UINT *row, MSIITERHANDLE *handle )
 247 {
 248     MSIJOINVIEW *jv = (MSIJOINVIEW*)view;
 249     UINT i, row_value;
 250
 251     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 252
 253     if (col == 0 || col > jv->columns)
 254         return ERROR_INVALID_PARAMETER;
 255
 256     for (i = (UINT)*handle; i < jv->rows; i++)
 257     {
 258         if (view->ops->fetch_int( view, i, col, &row_value ) != ERROR_SUCCESS)
 259             continue;
 260
 261         if (row_value == val)
 262         {
 263             *row = i;
 264             (*(UINT *)handle) = i + 1;
 265             return ERROR_SUCCESS;
 266         }
 267     }
 268
 269     return ERROR_NO_MORE_ITEMS;
 270 }
 271
 272 static UINT JOIN_sort(struct tagMSIVIEW *view, column_info *columns)
 273 {
 274     MSIJOINVIEW *jv = (MSIJOINVIEW *)view;
 275     JOINTABLE *table;
 276     UINT r;
 277
 278     TRACE("%p %p\n", view, columns);
 279
 280     LIST_FOR_EACH_ENTRY(table, &jv->tables, JOINTABLE, entry)
 281     {
 282         r = table->view->ops->sort(table->view, columns);
 283         if (r != ERROR_SUCCESS)
 284             return r;
 285     }
 286
 287     return ERROR_SUCCESS;
 288 }
 289
 290 static const MSIVIEWOPS join_ops =
 291 {
 292     JOIN_fetch_int,
 293     JOIN_fetch_stream,
 294     JOIN_get_row,
 295     NULL,
 296     NULL,
 297     NULL,
 298     JOIN_execute,
 299     JOIN_close,
 300     JOIN_get_dimensions,
 301     JOIN_get_column_info,
 302     JOIN_modify,
 303     JOIN_delete,
 304     JOIN_find_matching_rows,
 305     NULL,
 306     NULL,
 307     NULL,
 308     NULL,
 309     JOIN_sort,
 310     NULL,
 311 };
 312
 313 UINT JOIN_CreateView( MSIDATABASE *db, MSIVIEW **view, LPWSTR tables )
 314 {
 315     MSIJOINVIEW *jv = NULL;
 316     UINT r = ERROR_SUCCESS;
 317     JOINTABLE *table;
 318     LPWSTR ptr;
 319
 320     TRACE("%p (%s)\n", jv, debugstr_w(tables) );
 321
 322     jv = msi_alloc_zero( sizeof *jv );
 323     if( !jv )
 324         return ERROR_FUNCTION_FAILED;
 325
 326     /* fill the structure */
 327     jv->view.ops = &join_ops;
 328     jv->db = db;
 329     jv->columns = 0;
 330     jv->rows = 0;
 331
 332     list_init(&jv->tables);
 333
 334     while (*tables)
 335     {
 336         if ((ptr = strchrW(tables, ' ')))
 337             *ptr = '\0';
 338
 339         table = msi_alloc(sizeof(JOINTABLE));
 340         if (!table)
 341         {
 342             r = ERROR_OUTOFMEMORY;
 343             goto end;
 344         }
 345
 346         r = TABLE_CreateView( db, tables, &table->view );
 347         if( r != ERROR_SUCCESS )
 348         {
 349             WARN("can't create table: %s\n", debugstr_w(tables));
 350             r = ERROR_BAD_QUERY_SYNTAX;
 351             goto end;
 352         }
 353
 354         r = table->view->ops->get_dimensions( table->view, NULL, &table->columns );
 355         if( r != ERROR_SUCCESS )
 356         {
 357             ERR("can't get table dimensions\n");
 358             goto end;
 359         }
 360
 361         jv->columns += table->columns;
 362
 363         list_add_head( &jv->tables, &table->entry );
 364
 365         if (!ptr)
 366             break;
 367
 368         tables = ptr + 1;
 369     }
 370
 371     *view = &jv->view;
 372     return ERROR_SUCCESS;
 373
 374 end:
 375     jv->view.ops->delete( &jv->view );
 376
 377     return r;
 378 }