dlls/msi/alter.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2006 Mike McCormack
   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
  33 #include "query.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
  36
  37 typedef struct tagMSIALTERVIEW
  38 {
  39     MSIVIEW        view;
  40     MSIDATABASE   *db;
  41     MSIVIEW       *table;
  42     column_info   *colinfo;
  43     INT hold;
  44 } MSIALTERVIEW;
  45
  46 static UINT ALTER_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
  47 {
  48     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
  49
  50     TRACE("%p %d %d %p\n", av, row, col, val );
  51
  52     return ERROR_FUNCTION_FAILED;
  53 }
  54
  55 static UINT ALTER_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm)
  56 {
  57     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
  58
  59     TRACE("%p %d %d %p\n", av, row, col, stm );
  60
  61     return ERROR_FUNCTION_FAILED;
  62 }
  63
  64 static UINT ALTER_get_row( struct tagMSIVIEW *view, UINT row, MSIRECORD **rec )
  65 {
  66     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
  67
  68     TRACE("%p %d %p\n", av, row, rec );
  69
  70     return av->table->ops->get_row(av->table, row, rec);
  71 }
  72
  73 static UINT ITERATE_columns(MSIRECORD *row, LPVOID param)
  74 {
  75     (*(UINT *)param)++;
  76     return ERROR_SUCCESS;
  77 }
  78
  79 static BOOL check_column_exists(MSIDATABASE *db, LPCWSTR table, LPCWSTR column)
  80 {
  81     MSIQUERY *view;
  82     MSIRECORD *rec;
  83     UINT r;
  84
  85     static const WCHAR query[] = {
  86         'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
  87         '`','_','C','o','l','u','m','n','s','`',' ','W','H','E','R','E',' ',
  88         '`','T','a','b','l','e','`','=','\'','%','s','\'',' ','A','N','D',' ',
  89         '`','N','a','m','e','`','=','\'','%','s','\'',0
  90     };
  91
  92     r = MSI_OpenQuery(db, &view, query, table, column);
  93     if (r != ERROR_SUCCESS)
  94         return FALSE;
  95
  96     r = MSI_ViewExecute(view, NULL);
  97     if (r != ERROR_SUCCESS)
  98         goto done;
  99
 100     r = MSI_ViewFetch(view, &rec);
 101     if (r == ERROR_SUCCESS)
 102         msiobj_release(&rec->hdr);
 103
 104 done:
 105     msiobj_release(&view->hdr);
 106     return (r == ERROR_SUCCESS);
 107 }
 108
 109 static UINT alter_add_column(MSIALTERVIEW *av)
 110 {
 111     UINT r, colnum = 1;
 112     MSIQUERY *view;
 113     MSIVIEW *columns;
 114
 115     static const WCHAR szColumns[] = {'_','C','o','l','u','m','n','s',0};
 116     static const WCHAR query[] = {
 117         'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
 118         '`','_','C','o','l','u','m','n','s','`',' ','W','H','E','R','E',' ',
 119         '`','T','a','b','l','e','`','=','\'','%','s','\'',' ','O','R','D','E','R',' ',
 120         'B','Y',' ','`','N','u','m','b','e','r','`',0
 121     };
 122
 123     r = TABLE_CreateView(av->db, szColumns, &columns);
 124     if (r != ERROR_SUCCESS)
 125         return r;
 126
 127     if (check_column_exists(av->db, av->colinfo->table, av->colinfo->column))
 128         return ERROR_BAD_QUERY_SYNTAX;
 129
 130     r = MSI_OpenQuery(av->db, &view, query, av->colinfo->table, av->colinfo->column);
 131     if (r == ERROR_SUCCESS)
 132     {
 133         r = MSI_IterateRecords(view, NULL, ITERATE_columns, &colnum);
 134         msiobj_release(&view->hdr);
 135     }
 136
 137     r = columns->ops->add_column(columns, av->colinfo->table,
 138                                  colnum, av->colinfo->column,
 139                                  av->colinfo->type, (av->hold == 1));
 140
 141     columns->ops->delete(columns);
 142     return r;
 143 }
 144
 145 static UINT ALTER_execute( struct tagMSIVIEW *view, MSIRECORD *record )
 146 {
 147     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 148     UINT ref;
 149
 150     TRACE("%p %p\n", av, record);
 151
 152     if (av->hold == 1)
 153         av->table->ops->add_ref(av->table);
 154     else if (av->hold == -1)
 155     {
 156         ref = av->table->ops->release(av->table);
 157         if (ref == 0)
 158             av->table = NULL;
 159     }
 160
 161     if (av->colinfo)
 162         return alter_add_column(av);
 163
 164     return ERROR_SUCCESS;
 165 }
 166
 167 static UINT ALTER_close( struct tagMSIVIEW *view )
 168 {
 169     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 170
 171     TRACE("%p\n", av );
 172
 173     return ERROR_SUCCESS;
 174 }
 175
 176 static UINT ALTER_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 177 {
 178     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 179
 180     TRACE("%p %p %p\n", av, rows, cols );
 181
 182     return ERROR_FUNCTION_FAILED;
 183 }
 184
 185 static UINT ALTER_get_column_info( struct tagMSIVIEW *view,
 186                 UINT n, LPWSTR *name, UINT *type )
 187 {
 188     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 189
 190     TRACE("%p %d %p %p\n", av, n, name, type );
 191
 192     return ERROR_FUNCTION_FAILED;
 193 }
 194
 195 static UINT ALTER_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 196                           MSIRECORD *rec, UINT row )
 197 {
 198     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 199
 200     TRACE("%p %d %p\n", av, eModifyMode, rec );
 201
 202     return ERROR_FUNCTION_FAILED;
 203 }
 204
 205 static UINT ALTER_delete( struct tagMSIVIEW *view )
 206 {
 207     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 208
 209     TRACE("%p\n", av );
 210     if (av->table)
 211         av->table->ops->delete( av->table );
 212     msi_free( av );
 213
 214     return ERROR_SUCCESS;
 215 }
 216
 217 static UINT ALTER_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 218     UINT val, UINT *row, MSIITERHANDLE *handle )
 219 {
 220     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 221
 222     return ERROR_FUNCTION_FAILED;
 223 }
 224
 225 static const MSIVIEWOPS alter_ops =
 226 {
 227     ALTER_fetch_int,
 228     ALTER_fetch_stream,
 229     ALTER_get_row,
 230     NULL,
 231     NULL,
 232     NULL,
 233     ALTER_execute,
 234     ALTER_close,
 235     ALTER_get_dimensions,
 236     ALTER_get_column_info,
 237     ALTER_modify,
 238     ALTER_delete,
 239     ALTER_find_matching_rows,
 240     NULL,
 241     NULL,
 242     NULL,
 243     NULL,
 244     NULL,
 245 };
 246
 247 UINT ALTER_CreateView( MSIDATABASE *db, MSIVIEW **view, LPCWSTR name, column_info *colinfo, int hold )
 248 {
 249     MSIALTERVIEW *av;
 250     UINT r;
 251
 252     TRACE("%p %p %s %d\n", view, colinfo, debugstr_w(name), hold );
 253
 254     av = msi_alloc_zero( sizeof *av );
 255     if( !av )
 256         return ERROR_FUNCTION_FAILED;
 257
 258     r = TABLE_CreateView( db, name, &av->table );
 259     if (r != ERROR_SUCCESS || !av->table)
 260         return r;
 261
 262     if (colinfo)
 263         colinfo->table = name;
 264
 265     /* fill the structure */
 266     av->view.ops = &alter_ops;
 267     av->db = db;
 268     av->hold = hold;
 269     av->colinfo = colinfo;
 270
 271     *view = &av->view;
 272
 273     return ERROR_SUCCESS;
 274 }