dlls/msi/order.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., 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
  39 /* below is the query interface to a table */
  40
  41 typedef struct tagMSIORDERVIEW
  42 {
  43     MSIVIEW        view;
  44     MSIDATABASE   *db;
  45     MSIVIEW       *table;
  46     UINT          *reorder;
  47     UINT           num_cols;
  48     UINT           cols[1];
  49 } MSIORDERVIEW;
  50
  51 static UINT ORDER_compare( MSIORDERVIEW *ov, UINT a, UINT b, UINT *swap )
  52 {
  53     UINT r, i, a_val = 0, b_val = 0;
  54
  55     *swap = 0;
  56     for( i=0; i<ov->num_cols; i++ )
  57     {
  58         r = ov->table->ops->fetch_int( ov->table, a, ov->cols[i], &a_val );
  59         if( r != ERROR_SUCCESS )
  60             return r;
  61
  62         r = ov->table->ops->fetch_int( ov->table, b, ov->cols[i], &b_val );
  63         if( r != ERROR_SUCCESS )
  64             return r;
  65
  66         if( a_val != b_val )
  67         {
  68             if( a_val > b_val )
  69                 *swap = 1;
  70             break;
  71         }
  72     }
  73
  74     return ERROR_SUCCESS;
  75 }
  76
  77 static UINT ORDER_mergesort( MSIORDERVIEW *ov, UINT left, UINT right )
  78 {
  79     UINT r, centre = (left + right)/2, temp, swap = 0, i, j;
  80     UINT *array = ov->reorder;
  81
  82     if( left == right )
  83         return ERROR_SUCCESS;
  84
  85     /* sort the left half */
  86     r = ORDER_mergesort( ov, left, centre );
  87     if( r != ERROR_SUCCESS )
  88         return r;
  89
  90     /* sort the right half */
  91     r = ORDER_mergesort( ov, centre+1, right );
  92     if( r != ERROR_SUCCESS )
  93         return r;
  94
  95     for( i=left, j=centre+1; (i<=centre) && (j<=right); i++ )
  96     {
  97         r = ORDER_compare( ov, array[i], array[j], &swap );
  98         if( r != ERROR_SUCCESS )
  99             return r;
 100         if( swap )
 101         {
 102             temp = array[j];
 103             memmove( &array[i+1], &array[i], (j-i)*sizeof (UINT) );
 104             array[i] = temp;
 105             j++;
 106             centre++;
 107         }
 108     }
 109
 110     return ERROR_SUCCESS;
 111 }
 112
 113 static UINT ORDER_verify( MSIORDERVIEW *ov, UINT num_rows )
 114 {
 115     UINT i, swap, r;
 116
 117     for( i=1; i<num_rows; i++ )
 118     {
 119         r = ORDER_compare( ov, ov->reorder[i-1], ov->reorder[i], &swap );
 120         if( r != ERROR_SUCCESS )
 121             return r;
 122         if( !swap )
 123             continue;
 124         ERR("Bad order! %d\n", i);
 125         return ERROR_FUNCTION_FAILED;
 126     }
 127
 128     return ERROR_SUCCESS;
 129 }
 130
 131 static UINT ORDER_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
 132 {
 133     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 134
 135     TRACE("%p %d %d %p\n", ov, row, col, val );
 136
 137     if( !ov->table )
 138          return ERROR_FUNCTION_FAILED;
 139
 140     row = ov->reorder[ row ];
 141
 142     return ov->table->ops->fetch_int( ov->table, row, col, val );
 143 }
 144
 145 static UINT ORDER_execute( struct tagMSIVIEW *view, MSIRECORD *record )
 146 {
 147     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 148     UINT r, num_rows = 0, i;
 149
 150     TRACE("%p %p\n", ov, record);
 151
 152     if( !ov->table )
 153          return ERROR_FUNCTION_FAILED;
 154
 155     r = ov->table->ops->execute( ov->table, record );
 156     if( r != ERROR_SUCCESS )
 157         return r;
 158
 159     r = ov->table->ops->get_dimensions( ov->table, &num_rows, NULL );
 160     if( r != ERROR_SUCCESS )
 161         return r;
 162
 163     ov->reorder = msi_alloc( num_rows*sizeof(UINT) );
 164     if( !ov->reorder )
 165         return ERROR_FUNCTION_FAILED;
 166
 167     for( i=0; i<num_rows; i++ )
 168         ov->reorder[i] = i;
 169
 170     r = ORDER_mergesort( ov, 0, num_rows - 1 );
 171     if( r != ERROR_SUCCESS )
 172         return r;
 173
 174     r = ORDER_verify( ov, num_rows );
 175     if( r != ERROR_SUCCESS )
 176         return r;
 177
 178     return ERROR_SUCCESS;
 179 }
 180
 181 static UINT ORDER_close( struct tagMSIVIEW *view )
 182 {
 183     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 184
 185     TRACE("%p\n", ov );
 186
 187     if( !ov->table )
 188          return ERROR_FUNCTION_FAILED;
 189
 190     msi_free( ov->reorder );
 191     ov->reorder = NULL;
 192
 193     return ov->table->ops->close( ov->table );
 194 }
 195
 196 static UINT ORDER_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 197 {
 198     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 199
 200     TRACE("%p %p %p\n", ov, rows, cols );
 201
 202     if( !ov->table )
 203          return ERROR_FUNCTION_FAILED;
 204
 205     return ov->table->ops->get_dimensions( ov->table, rows, cols );
 206 }
 207
 208 static UINT ORDER_get_column_info( struct tagMSIVIEW *view,
 209                 UINT n, LPWSTR *name, UINT *type )
 210 {
 211     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 212
 213     TRACE("%p %d %p %p\n", ov, n, name, type );
 214
 215     if( !ov->table )
 216          return ERROR_FUNCTION_FAILED;
 217
 218     return ov->table->ops->get_column_info( ov->table, n, name, type );
 219 }
 220
 221 static UINT ORDER_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 222                 MSIRECORD *rec )
 223 {
 224     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 225
 226     TRACE("%p %d %p\n", ov, eModifyMode, rec );
 227
 228     if( !ov->table )
 229          return ERROR_FUNCTION_FAILED;
 230
 231     return ov->table->ops->modify( ov->table, eModifyMode, rec );
 232 }
 233
 234 static UINT ORDER_delete( struct tagMSIVIEW *view )
 235 {
 236     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 237
 238     TRACE("%p\n", ov );
 239
 240     if( ov->table )
 241         ov->table->ops->delete( ov->table );
 242
 243     msi_free( ov->reorder );
 244     ov->reorder = NULL;
 245
 246     msiobj_release( &ov->db->hdr );
 247     msi_free( ov );
 248
 249     return ERROR_SUCCESS;
 250 }
 251
 252 static UINT ORDER_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 253     UINT val, UINT *row, MSIITERHANDLE *handle )
 254 {
 255     MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
 256     UINT r;
 257
 258     TRACE("%p, %d, %u, %p\n", ov, col, val, *handle);
 259
 260     if( !ov->table )
 261          return ERROR_FUNCTION_FAILED;
 262
 263     r = ov->table->ops->find_matching_rows( ov->table, col, val, row, handle );
 264
 265     *row = ov->reorder[ *row ];
 266
 267     return r;
 268 }
 269
 270
 271 static const MSIVIEWOPS order_ops =
 272 {
 273     ORDER_fetch_int,
 274     NULL,
 275     NULL,
 276     NULL,
 277     ORDER_execute,
 278     ORDER_close,
 279     ORDER_get_dimensions,
 280     ORDER_get_column_info,
 281     ORDER_modify,
 282     ORDER_delete,
 283     ORDER_find_matching_rows
 284 };
 285
 286 static UINT ORDER_AddColumn( MSIORDERVIEW *ov, LPCWSTR name )
 287 {
 288     UINT n, count, r;
 289     MSIVIEW *table;
 290
 291     TRACE("%p adding %s\n", ov, debugstr_w( name ) );
 292
 293     if( ov->view.ops != &order_ops )
 294         return ERROR_FUNCTION_FAILED;
 295
 296     table = ov->table;
 297     if( !table )
 298         return ERROR_FUNCTION_FAILED;
 299     if( !table->ops->get_dimensions )
 300         return ERROR_FUNCTION_FAILED;
 301     if( !table->ops->get_column_info )
 302         return ERROR_FUNCTION_FAILED;
 303
 304     r = table->ops->get_dimensions( table, NULL, &count );
 305     if( r != ERROR_SUCCESS )
 306         return r;
 307
 308     if( ov->num_cols >= count )
 309         return ERROR_FUNCTION_FAILED;
 310
 311     r = VIEW_find_column( table, name, &n );
 312     if( r != ERROR_SUCCESS )
 313         return r;
 314
 315     ov->cols[ov->num_cols] = n;
 316     TRACE("Ordering by column %s (%d)\n", debugstr_w( name ), n);
 317
 318     ov->num_cols++;
 319
 320     return ERROR_SUCCESS;
 321 }
 322
 323 UINT ORDER_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
 324                        column_info *columns )
 325 {
 326     MSIORDERVIEW *ov = NULL;
 327     UINT count = 0, r;
 328     column_info *x;
 329
 330     TRACE("%p\n", ov );
 331
 332     r = table->ops->get_dimensions( table, NULL, &count );
 333     if( r != ERROR_SUCCESS )
 334     {
 335         ERR("can't get table dimensions\n");
 336         return r;
 337     }
 338
 339     ov = msi_alloc_zero( sizeof *ov + sizeof (UINT) * count );
 340     if( !ov )
 341         return ERROR_FUNCTION_FAILED;
 342
 343     /* fill the structure */
 344     ov->view.ops = &order_ops;
 345     msiobj_addref( &db->hdr );
 346     ov->db = db;
 347     ov->table = table;
 348     ov->reorder = NULL;
 349     ov->num_cols = 0;
 350     *view = (MSIVIEW*) ov;
 351
 352     for( x = columns; x ; x = x->next )
 353         ORDER_AddColumn( ov, x->column );
 354
 355     return ERROR_SUCCESS;
 356 }