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     {
 129         columns->ops->delete(columns);
 130         return ERROR_BAD_QUERY_SYNTAX;
 131     }
 132
 133     r = MSI_OpenQuery(av->db, &view, query, av->colinfo->table, av->colinfo->column);
 134     if (r == ERROR_SUCCESS)
 135     {
 136         r = MSI_IterateRecords(view, NULL, ITERATE_columns, &colnum);
 137         msiobj_release(&view->hdr);
 138     }
 139
 140     r = columns->ops->add_column(columns, av->colinfo->table,
 141                                  colnum, av->colinfo->column,
 142                                  av->colinfo->type, (av->hold == 1));
 143
 144     columns->ops->delete(columns);
 145     return r;
 146 }
 147
 148 static UINT ALTER_execute( struct tagMSIVIEW *view, MSIRECORD *record )
 149 {
 150     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 151     UINT ref;
 152
 153     TRACE("%p %p\n", av, record);
 154
 155     if (av->hold == 1)
 156         av->table->ops->add_ref(av->table);
 157     else if (av->hold == -1)
 158     {
 159         ref = av->table->ops->release(av->table);
 160         if (ref == 0)
 161             av->table = NULL;
 162     }
 163
 164     if (av->colinfo)
 165         return alter_add_column(av);
 166
 167     return ERROR_SUCCESS;
 168 }
 169
 170 static UINT ALTER_close( struct tagMSIVIEW *view )
 171 {
 172     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 173
 174     TRACE("%p\n", av );
 175
 176     return ERROR_SUCCESS;
 177 }
 178
 179 static UINT ALTER_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
 180 {
 181     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 182
 183     TRACE("%p %p %p\n", av, rows, cols );
 184
 185     return ERROR_FUNCTION_FAILED;
 186 }
 187
 188 static UINT ALTER_get_column_info( struct tagMSIVIEW *view,
 189                 UINT n, LPWSTR *name, UINT *type, BOOL *temporary,
 190                 LPWSTR *table_name)
 191 {
 192     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 193
 194     TRACE("%p %d %p %p %p %p\n", av, n, name, type, temporary, table_name );
 195
 196     return ERROR_FUNCTION_FAILED;
 197 }
 198
 199 static UINT ALTER_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
 200                           MSIRECORD *rec, UINT row )
 201 {
 202     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 203
 204     TRACE("%p %d %p\n", av, eModifyMode, rec );
 205
 206     return ERROR_FUNCTION_FAILED;
 207 }
 208
 209 static UINT ALTER_delete( struct tagMSIVIEW *view )
 210 {
 211     MSIALTERVIEW *av = (MSIALTERVIEW*)view;
 212
 213     TRACE("%p\n", av );
 214     if (av->table)
 215         av->table->ops->delete( av->table );
 216     msi_free( av );
 217
 218     return ERROR_SUCCESS;
 219 }
 220
 221 static UINT ALTER_find_matching_rows( struct tagMSIVIEW *view, UINT col,
 222     UINT val, UINT *row, MSIITERHANDLE *handle )
 223 {
 224     TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
 225
 226     return ERROR_FUNCTION_FAILED;
 227 }
 228
 229 static const MSIVIEWOPS alter_ops =
 230 {
 231     ALTER_fetch_int,
 232     ALTER_fetch_stream,
 233     ALTER_get_row,
 234     NULL,
 235     NULL,
 236     NULL,
 237     ALTER_execute,
 238     ALTER_close,
 239     ALTER_get_dimensions,
 240     ALTER_get_column_info,
 241     ALTER_modify,
 242     ALTER_delete,
 243     ALTER_find_matching_rows,
 244     NULL,
 245     NULL,
 246     NULL,
 247     NULL,
 248     NULL,
 249     NULL,
 250 };
 251
 252 UINT ALTER_CreateView( MSIDATABASE *db, MSIVIEW **view, LPCWSTR name, column_info *colinfo, int hold )
 253 {
 254     MSIALTERVIEW *av;
 255     UINT r;
 256
 257     TRACE("%p %p %s %d\n", view, colinfo, debugstr_w(name), hold );
 258
 259     av = msi_alloc_zero( sizeof *av );
 260     if( !av )
 261         return ERROR_FUNCTION_FAILED;
 262
 263     r = TABLE_CreateView( db, name, &av->table );
 264     if (r != ERROR_SUCCESS)
 265     {
 266         msi_free( av );
 267         return r;
 268     }
 269
 270     if (colinfo)
 271         colinfo->table = name;
 272
 273     /* fill the structure */
 274     av->view.ops = &alter_ops;
 275     av->db = db;
 276     av->hold = hold;
 277     av->colinfo = colinfo;
 278
 279     *view = &av->view;
 280
 281     return ERROR_SUCCESS;
 282 }