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