dlls/msi/where.c

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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(msi);
  37
  38
  39 /* below is the query interface to a table */
  40
  41 typedef struct tagMSIWHEREVIEW
  42 {
  43     MSIVIEW        view;
  44     MSIDATABASE   *db;
  45     MSIVIEW       *table;
  46     UINT           row_count;
  47     UINT          *reorder;
  48     struct expr   *cond;
  49 } MSIWHEREVIEW;
  50
  51 static UINT WHERE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  52 {
  53     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
  54
  55     TRACE("%p %d %d %p\n", wv, row, col, val );
  56
  57     if( !wv->table )
  58         return ERROR_FUNCTION_FAILED;
  59
  60     if( row > wv->row_count )
  61         return ERROR_NO_MORE_ITEMS;
  62
  63     row = wv->reorder[ row ];
  64
  65     return wv->table->ops->fetch_int( wv->table, row, col, val );
  66 }
  67
  68 static UINT WHERE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm )
  69 {
  70     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
  71
  72     TRACE("%p %d %d %p\n", wv, row, col, stm );
  73
  74     if( !wv->table )
  75         return ERROR_FUNCTION_FAILED;
  76
  77     if( row > wv->row_count )
  78         return ERROR_NO_MORE_ITEMS;
  79
  80     row = wv->reorder[ row ];
  81
  82     return wv->table->ops->fetch_stream( wv->table, row, col, stm );
  83 }
  84
  85 static UINT WHERE_set_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT val )
  86 {
  87     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
  88
  89     TRACE("%p %d %d %04x\n", wv, row, col, val );
  90
  91     if( !wv->table )
  92          return ERROR_FUNCTION_FAILED;
  93
  94     if( row > wv->row_count )
  95         return ERROR_NO_MORE_ITEMS;
  96
  97     row = wv->reorder[ row ];
  98
  99     return wv->table->ops->set_int( wv->table, row, col, val );
 100 }
 101
 102 static UINT INT_evaluate( UINT lval, UINT op, UINT rval )
 103 {
 104     switch( op )
 105     {
 106     case OP_EQ:
 107         return ( lval == rval );
 108     case OP_AND:
 109         return ( lval && rval );
 110     case OP_OR:
 111         return ( lval || rval );
 112     case OP_GT:
 113         return ( lval > rval );
 114     case OP_LT:
 115         return ( lval < rval );
 116     case OP_LE:
 117         return ( lval <= rval );
 118     case OP_GE:
 119         return ( lval >= rval );
 120     case OP_NE:
 121         return ( lval != rval );
 122     case OP_ISNULL:
 123         return ( !lval );
 124     case OP_NOTNULL:
 125         return ( lval );
 126     default:
 127         ERR("Unknown operator %d\n", op );
 128     }
 129     return 0;
 130 }
 131
 132 static const WCHAR *STRING_evaluate( string_table *st,
 133               MSIVIEW *table, UINT row, struct expr *expr, MSIRECORD *record )
 134 {
 135     UINT val = 0, r;
 136
 137     switch( expr->type )
 138     {
 139     case EXPR_COL_NUMBER_STRING:
 140         r = table->ops->fetch_int( table, row, expr->u.col_number, &val );
 141         if( r != ERROR_SUCCESS )
 142             return NULL;
 143         return msi_string_lookup_id( st, val );
 144
 145     case EXPR_SVAL:
 146         return expr->u.sval;
 147
 148     case EXPR_WILDCARD:
 149         return MSI_RecordGetString( record, 1 );
 150
 151     default:
 152         ERR("Invalid expression type\n");
 153         break;
 154     }
 155     return NULL;
 156 }
 157
 158 static UINT STRCMP_Evaluate( string_table *st, MSIVIEW *table, UINT row,
 159                              struct expr *cond, UINT *val, MSIRECORD *record )
 160 {
 161     int sr;
 162     const WCHAR *l_str, *r_str;
 163
 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 );
 166     if( l_str == r_str )
 167         sr = 0;
 168     else if( l_str && ! r_str )
 169         sr = 1;
 170     else if( r_str && ! l_str )
 171         sr = -1;
 172     else
 173         sr = lstrcmpW( l_str, r_str );
 174
 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 ) );
 178
 179     return ERROR_SUCCESS;
 180 }
 181
 182 static UINT WHERE_evaluate( MSIDATABASE *db, MSIVIEW *table, UINT row,
 183                              struct expr *cond, UINT *val, MSIRECORD *record )
 184 {
 185     UINT r, lval, rval;
 186
 187     if( !cond )
 188         return ERROR_SUCCESS;
 189
 190     switch( cond->type )
 191     {
 192     case EXPR_COL_NUMBER_STRING:
 193     case EXPR_COL_NUMBER:
 194         return table->ops->fetch_int( table, row, cond->u.col_number, val );
 195
 196     case EXPR_UVAL:
 197         *val = cond->u.uval;
 198         return ERROR_SUCCESS;
 199
 200     case EXPR_COMPLEX:
 201         r = WHERE_evaluate( db, table, row, cond->u.expr.left, &lval, record );
 202         if( r != ERROR_SUCCESS )
 203             return r;
 204         r = WHERE_evaluate( db, table, row, cond->u.expr.right, &rval, record );
 205         if( r != ERROR_SUCCESS )
 206             return r;
 207         *val = INT_evaluate( lval, cond->u.expr.op, rval );
 208         return ERROR_SUCCESS;
 209
 210     case EXPR_STRCMP:
 211         return STRCMP_Evaluate( db->strings, table, row, cond, val, record );
 212
 213     case EXPR_WILDCARD:
 214         *val = MSI_RecordGetInteger( record, 1 );
 215         return ERROR_SUCCESS;
 216
 217     default:
 218         ERR("Invalid expression type\n");
 219         break;
 220     }
 221
 222     return ERROR_SUCCESS;
 223
 224 }
 225
 226 static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
 227 {
 228     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 229     UINT count = 0, r, val, i;
 230     MSIVIEW *table = wv->table;
 231
 232     TRACE("%p %p\n", wv, record);
 233
 234     if( !table )
 235          return ERROR_FUNCTION_FAILED;
 236
 237     r = table->ops->execute( table, record );
 238     if( r != ERROR_SUCCESS )
 239         return r;
 240
 241     r = table->ops->get_dimensions( table, &count, NULL );
 242     if( r != ERROR_SUCCESS )
 243         return r;
 244
 245     wv->reorder = msi_alloc( count*sizeof(UINT) );
 246     if( !wv->reorder )
 247         return ERROR_FUNCTION_FAILED;
 248
 249     wv->row_count = 0;
 250     for( i=0; i<count; i++ )
 251     {
 252         val = 0;
 253         r = WHERE_evaluate( wv->db, table, i, wv->cond, &val, record );
 254         if( r != ERROR_SUCCESS )
 255             return r;
 256         if( val )
 257             wv->reorder[ wv->row_count ++ ] = i;
 258     }
 259
 260     return ERROR_SUCCESS;
 261 }
 262
 263 static UINT WHERE_close( struct tagMSIVIEW *view )
 264 {
 265     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 266
 267     TRACE("%p\n", wv );
 268
 269     if( !wv->table )
 270          return ERROR_FUNCTION_FAILED;
 271
 272     msi_free( wv->reorder );
 273     wv->reorder = NULL;
 274
 275     return wv->table->ops->close( wv->table );
 276 }
 277
 278 static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 279 {
 280     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 281
 282     TRACE("%p %p %p\n", wv, rows, cols );
 283
 284     if( !wv->table )
 285          return ERROR_FUNCTION_FAILED;
 286
 287     if( rows )
 288     {
 289         if( !wv->reorder )
 290             return ERROR_FUNCTION_FAILED;
 291         *rows = wv->row_count;
 292     }
 293
 294     return wv->table->ops->get_dimensions( wv->table, NULL, cols );
 295 }
 296
 297 static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
 298                 UINT n, LPWSTR *name, UINT *type )
 299 {
 300     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 301
 302     TRACE("%p %d %p %p\n", wv, n, name, type );
 303
 304     if( !wv->table )
 305          return ERROR_FUNCTION_FAILED;
 306
 307     return wv->table->ops->get_column_info( wv->table, n, name, type );
 308 }
 309
 310 static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 311                 MSIRECORD *rec )
 312 {
 313     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 314
 315     TRACE("%p %d %p\n", wv, eModifyMode, rec );
 316
 317     if( !wv->table )
 318          return ERROR_FUNCTION_FAILED;
 319
 320     return wv->table->ops->modify( wv->table, eModifyMode, rec );
 321 }
 322
 323 static UINT WHERE_delete( struct tagMSIVIEW *view )
 324 {
 325     MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
 326
 327     TRACE("%p\n", wv );
 328
 329     if( wv->table )
 330         wv->table->ops->delete( wv->table );
 331
 332     msi_free( wv->reorder );
 333     wv->reorder = NULL;
 334     wv->row_count = 0;
 335
 336     msiobj_release( &wv->db->hdr );
 337     msi_free( wv );
 338
 339     return ERROR_SUCCESS;
 340 }
 341
 342
 343 MSIVIEWOPS where_ops =
 344 {
 345     WHERE_fetch_int,
 346     WHERE_fetch_stream,
 347     WHERE_set_int,
 348     NULL,
 349     WHERE_execute,
 350     WHERE_close,
 351     WHERE_get_dimensions,
 352     WHERE_get_column_info,
 353     WHERE_modify,
 354     WHERE_delete
 355 };
 356
 357 static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
 358                                    UINT *valid )
 359 {
 360     UINT r, val = 0;
 361
 362     switch( cond->type )
 363     {
 364     case EXPR_COLUMN:
 365         r = VIEW_find_column( table, cond->u.column, &val );
 366         if( r == ERROR_SUCCESS )
 367         {
 368             UINT type = 0;
 369             r = table->ops->get_column_info( table, val, NULL, &type );
 370             if( r == ERROR_SUCCESS )
 371             {
 372                 if (type&MSITYPE_STRING)
 373                     cond->type = EXPR_COL_NUMBER_STRING;
 374                 else
 375                     cond->type = EXPR_COL_NUMBER;
 376                 cond->u.col_number = val;
 377                 *valid = 1;
 378             }
 379             else
 380                 *valid = 0;
 381         }
 382         else
 383         {
 384             *valid = 0;
 385             ERR("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
 386         }
 387         break;
 388     case EXPR_COMPLEX:
 389         r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
 390         if( r != ERROR_SUCCESS )
 391             return r;
 392         if( !*valid )
 393             return ERROR_SUCCESS;
 394         r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
 395         if( r != ERROR_SUCCESS )
 396             return r;
 397
 398         /* check the type of the comparison */
 399         if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
 400             ( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
 401             ( cond->u.expr.right->type == EXPR_SVAL ) ||
 402             ( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
 403         {
 404             switch( cond->u.expr.op )
 405             {
 406             case OP_EQ:
 407             case OP_GT:
 408             case OP_LT:
 409                 break;
 410             default:
 411                 *valid = FALSE;
 412                 return ERROR_INVALID_PARAMETER;
 413             }
 414
 415             /* FIXME: check we're comparing a string to a column */
 416
 417             cond->type = EXPR_STRCMP;
 418         }
 419
 420         break;
 421     case EXPR_IVAL:
 422         *valid = 1;
 423         cond->type = EXPR_UVAL;
 424         cond->u.uval = cond->u.ival + (1<<15);
 425         break;
 426     case EXPR_WILDCARD:
 427         *valid = 1;
 428         break;
 429     case EXPR_SVAL:
 430         *valid = 1;
 431         break;
 432     default:
 433         ERR("Invalid expression type\n");
 434         *valid = 0;
 435         break;
 436     }
 437
 438     return ERROR_SUCCESS;
 439 }
 440
 441 UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
 442                        struct expr *cond )
 443 {
 444     MSIWHEREVIEW *wv = NULL;
 445     UINT count = 0, r, valid = 0;
 446
 447     TRACE("%p\n", wv );
 448
 449     r = table->ops->get_dimensions( table, NULL, &count );
 450     if( r != ERROR_SUCCESS )
 451     {
 452         ERR("can't get table dimensions\n");
 453         return r;
 454     }
 455
 456     if( cond )
 457     {
 458         r = WHERE_VerifyCondition( db, table, cond, &valid );
 459         if( r != ERROR_SUCCESS )
 460             return r;
 461         if( !valid )
 462             return ERROR_FUNCTION_FAILED;
 463     }
 464
 465     wv = msi_alloc_zero( sizeof *wv );
 466     if( !wv )
 467         return ERROR_FUNCTION_FAILED;
 468
 469     /* fill the structure */
 470     wv->view.ops = &where_ops;
 471     msiobj_addref( &db->hdr );
 472     wv->db = db;
 473     wv->table = table;
 474     wv->row_count = 0;
 475     wv->reorder = NULL;
 476     wv->cond = cond;
 477     *view = (MSIVIEW*) wv;
 478
 479     return ERROR_SUCCESS;
 480 }