programs/winecfg/winecfg.c

   1 /*
   2  * WineCfg configuration management
   3  *
   4  * Copyright 2002 Jaco Greeff
   5  * Copyright 2003 Dimitrie O. Paun
   6  * Copyright 2003-2004 Mike Hearn
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  * TODO:
  23  *  - Use unicode
  24  *  - Icons in listviews/icons
  25  *  - Better add app dialog, scan c: for EXE files and add to list in background
  26  *  - Use [GNOME] HIG style groupboxes rather than win32 style (looks nicer, imho)
  27  *
  28  */
  29
  30 #define WIN32_LEAN_AND_MEAN
  31
  32 #include <assert.h>
  33 #include <stdio.h>
  34 #include <limits.h>
  35 #include <windows.h>
  36 #include <winreg.h>
  37 #include <wine/debug.h>
  38 #include <wine/list.h>
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(winecfg);
  41
  42 #include "winecfg.h"
  43 #include "resource.h"
  44
  45 HKEY config_key = NULL;
  46 HMENU hPopupMenus = 0;
  47
  48
  49 /* this is called from the WM_SHOWWINDOW handlers of each tab page.
  50  *
  51  * it's a nasty hack, necessary because the property sheet insists on resetting the window title
  52  * to the title of the tab, which is utterly useless. dropping the property sheet is on the todo list.
  53  */
  54 void set_window_title(HWND dialog)
  55 {
  56     WCHAR newtitle[256];
  57
  58     /* update the window title  */
  59     if (current_app)
  60     {
  61         WCHAR apptitle[256];
  62         LoadStringW (GetModuleHandle(NULL), IDS_WINECFG_TITLE_APP, apptitle,
  63             sizeof(apptitle)/sizeof(apptitle[0]));
  64         wsprintfW (newtitle, apptitle, current_app);
  65     }
  66     else
  67     {
  68         LoadStringW (GetModuleHandle(NULL), IDS_WINECFG_TITLE, newtitle,
  69             sizeof(newtitle)/sizeof(newtitle[0]));
  70     }
  71
  72     WINE_TRACE("setting title to %s\n", wine_dbgstr_w (newtitle));
  73     SendMessageW (GetParent(dialog), PSM_SETTITLEW, 0, (LPARAM) newtitle);
  74 }
  75
  76
  77 WCHAR* load_string (UINT id)
  78 {
  79     WCHAR buf[1024];
  80     int len;
  81     WCHAR* newStr;
  82
  83     LoadStringW (GetModuleHandle (NULL), id, buf, sizeof(buf)/sizeof(buf[0]));
  84
  85     len = lstrlenW (buf);
  86     newStr = HeapAlloc (GetProcessHeap(), 0, (len + 1) * sizeof (WCHAR));
  87     memcpy (newStr, buf, len * sizeof (WCHAR));
  88     newStr[len] = 0;
  89     return newStr;
  90 }
  91
  92 /**
  93  * get_config_key: Retrieves a configuration value from the registry
  94  *
  95  * char *subkey : the name of the config section
  96  * char *name : the name of the config value
  97  * char *default : if the key isn't found, return this value instead
  98  *
  99  * Returns a buffer holding the value if successful, NULL if
 100  * not. Caller is responsible for releasing the result.
 101  *
 102  */
 103 static WCHAR *get_config_key (HKEY root, const WCHAR *subkey, const WCHAR *name, const WCHAR *def)
 104 {
 105     LPWSTR buffer = NULL;
 106     DWORD len;
 107     HKEY hSubKey = NULL;
 108     DWORD res;
 109
 110     WINE_TRACE("subkey=%s, name=%s, def=%s\n", wine_dbgstr_w(subkey),
 111                wine_dbgstr_w(name), wine_dbgstr_w(def));
 112
 113     res = RegOpenKeyW(root, subkey, &hSubKey);
 114     if (res != ERROR_SUCCESS)
 115     {
 116         if (res == ERROR_FILE_NOT_FOUND)
 117         {
 118             WINE_TRACE("Section key not present - using default\n");
 119             return def ? strdupW(def) : NULL;
 120         }
 121         else
 122         {
 123             WINE_ERR("RegOpenKey failed on wine config key (res=%d)\n", res);
 124         }
 125         goto end;
 126     }
 127
 128     res = RegQueryValueExW(hSubKey, name, NULL, NULL, NULL, &len);
 129     if (res == ERROR_FILE_NOT_FOUND)
 130     {
 131         WINE_TRACE("Value not present - using default\n");
 132         buffer = def ? strdupW(def) : NULL;
 133         goto end;
 134     } else if (res != ERROR_SUCCESS)
 135     {
 136         WINE_ERR("Couldn't query value's length (res=%d)\n", res);
 137         goto end;
 138     }
 139
 140     buffer = HeapAlloc(GetProcessHeap(), 0, len + sizeof(WCHAR));
 141
 142     RegQueryValueExW(hSubKey, name, NULL, NULL, (LPBYTE) buffer, &len);
 143
 144     WINE_TRACE("buffer=%s\n", wine_dbgstr_w(buffer));
 145 end:
 146     if (hSubKey && hSubKey != root) RegCloseKey(hSubKey);
 147
 148     return buffer;
 149 }
 150
 151 /**
 152  * set_config_key: convenience wrapper to set a key/value pair
 153  *
 154  * const char *subKey : the name of the config section
 155  * const char *valueName : the name of the config value
 156  * const char *value : the value to set the configuration key to
 157  *
 158  * Returns 0 on success, non-zero otherwise
 159  *
 160  * If valueName or value is NULL, an empty section will be created
 161  */
 162 static int set_config_key(HKEY root, const WCHAR *subkey, const WCHAR *name, const void *value, DWORD type) {
 163     DWORD res = 1;
 164     HKEY key = NULL;
 165
 166     WINE_TRACE("subkey=%s: name=%s, value=%p, type=%d\n", wine_dbgstr_w(subkey),
 167                wine_dbgstr_w(name), value, type);
 168
 169     assert( subkey != NULL );
 170
 171     if (subkey[0])
 172     {
 173         res = RegCreateKeyW(root, subkey, &key);
 174         if (res != ERROR_SUCCESS) goto end;
 175     }
 176     else key = root;
 177     if (name == NULL || value == NULL) goto end;
 178
 179     switch (type)
 180     {
 181         case REG_SZ: res = RegSetValueExW(key, name, 0, REG_SZ, value, (lstrlenW(value)+1)*sizeof(WCHAR)); break;
 182         case REG_DWORD: res = RegSetValueExW(key, name, 0, REG_DWORD, value, sizeof(DWORD)); break;
 183     }
 184     if (res != ERROR_SUCCESS) goto end;
 185
 186     res = 0;
 187 end:
 188     if (key && key != root) RegCloseKey(key);
 189     if (res != 0)
 190         WINE_ERR("Unable to set configuration key %s in section %s, res=%d\n",
 191                  wine_dbgstr_w(name), wine_dbgstr_w(subkey), res);
 192     return res;
 193 }
 194
 195 /* removes the requested value from the registry, however, does not
 196  * remove the section if empty. Returns S_OK (0) on success.
 197  */
 198 static HRESULT remove_value(HKEY root, const WCHAR *subkey, const WCHAR *name)
 199 {
 200     HRESULT hr;
 201     HKEY key;
 202
 203     WINE_TRACE("subkey=%s, name=%s\n", wine_dbgstr_w(subkey), wine_dbgstr_w(name));
 204
 205     hr = RegOpenKeyW(root, subkey, &key);
 206     if (hr != S_OK) return hr;
 207
 208     hr = RegDeleteValueW(key, name);
 209     if (hr != ERROR_SUCCESS) return hr;
 210
 211     return S_OK;
 212 }
 213
 214 /* ========================================================================= */
 215
 216 /* This code exists for the following reasons:
 217  *
 218  * - It makes working with the registry easier
 219  * - By storing a mini cache of the registry, we can more easily implement
 220  *   cancel/revert and apply. The 'settings list' is an overlay on top of
 221  *   the actual registry data that we can write out at will.
 222  *
 223  * Rather than model a tree in memory, we simply store each absolute (rooted
 224  * at the config key) path.
 225  *
 226  */
 227
 228 struct setting
 229 {
 230     struct list entry;
 231     HKEY root;    /* the key on which path is rooted */
 232     WCHAR *path;   /* path in the registry rooted at root  */
 233     WCHAR *name;   /* name of the registry value. if null, this means delete the key  */
 234     WCHAR *value;  /* contents of the registry value. if null, this means delete the value  */
 235     DWORD type;   /* type of registry value. REG_SZ or REG_DWORD for now */
 236 };
 237
 238 struct list *settings;
 239
 240 static void free_setting(struct setting *setting)
 241 {
 242     assert( setting != NULL );
 243     assert( setting->path );
 244
 245     WINE_TRACE("destroying %p: %s\n", setting,
 246                wine_dbgstr_w(setting->path));
 247
 248     HeapFree(GetProcessHeap(), 0, setting->path);
 249     HeapFree(GetProcessHeap(), 0, setting->name);
 250     HeapFree(GetProcessHeap(), 0, setting->value);
 251
 252     list_remove(&setting->entry);
 253
 254     HeapFree(GetProcessHeap(), 0, setting);
 255 }
 256
 257 /**
 258  * Returns the contents of the value at path. If not in the settings
 259  * list, it will be fetched from the registry - failing that, the
 260  * default will be used.
 261  *
 262  * If already in the list, the contents as given there will be
 263  * returned. You are expected to HeapFree the result.
 264  */
 265 WCHAR *get_reg_keyW(HKEY root, const WCHAR *path, const WCHAR *name, const WCHAR *def)
 266 {
 267     struct list *cursor;
 268     struct setting *s;
 269     WCHAR *val;
 270
 271     WINE_TRACE("path=%s, name=%s, def=%s\n", wine_dbgstr_w(path),
 272                wine_dbgstr_w(name), wine_dbgstr_w(def));
 273
 274     /* check if it's in the list */
 275     LIST_FOR_EACH( cursor, settings )
 276     {
 277         s = LIST_ENTRY(cursor, struct setting, entry);
 278
 279         if (root != s->root) continue;
 280         if (lstrcmpiW(path, s->path) != 0) continue;
 281         if (!s->name) continue;
 282         if (lstrcmpiW(name, s->name) != 0) continue;
 283
 284         WINE_TRACE("found %s:%s in settings list, returning %s\n",
 285                    wine_dbgstr_w(path), wine_dbgstr_w(name),
 286                    wine_dbgstr_w(s->value));
 287         return s->value ? strdupW(s->value) : NULL;
 288     }
 289
 290     /* no, so get from the registry */
 291     val = get_config_key(root, path, name, def);
 292
 293     WINE_TRACE("returning %s\n", wine_dbgstr_w(val));
 294
 295     return val;
 296 }
 297
 298 char *get_reg_key(HKEY root, const char *path, const char *name, const char *def)
 299 {
 300     WCHAR *wpath, *wname, *wdef = NULL, *wRet = NULL;
 301     char *szRet = NULL;
 302     int len;
 303
 304     WINE_TRACE("path=%s, name=%s, def=%s\n", path, name, def);
 305
 306     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 307     wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 308
 309     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 310     MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 311
 312     if (def)
 313     {
 314         wdef = HeapAlloc(GetProcessHeap(), 0, (strlen(def)+1)*sizeof(WCHAR));
 315         MultiByteToWideChar(CP_ACP, 0, def, -1, wdef, strlen(def)+1);
 316     }
 317
 318     wRet = get_reg_keyW(root, wpath, wname, wdef);
 319
 320     len = WideCharToMultiByte(CP_ACP, 0, wRet, -1, NULL, 0, NULL, NULL);
 321     if (len)
 322     {
 323         szRet = HeapAlloc(GetProcessHeap(), 0, len);
 324         WideCharToMultiByte(CP_ACP, 0, wRet, -1, szRet, len, NULL, NULL);
 325     }
 326
 327     HeapFree(GetProcessHeap(), 0, wpath);
 328     HeapFree(GetProcessHeap(), 0, wname);
 329     HeapFree(GetProcessHeap(), 0, wdef);
 330     HeapFree(GetProcessHeap(), 0, wRet);
 331
 332     return szRet;
 333 }
 334
 335 /**
 336  * Used to set a registry key.
 337  *
 338  * path is rooted at the config key, ie use "Version" or
 339  * "AppDefaults\\fooapp.exe\\Version". You can use keypath()
 340  * to get such a string.
 341  *
 342  * name is the value name, or NULL to delete the path.
 343  *
 344  * value is what to set the value to, or NULL to delete it.
 345  *
 346  * type is REG_SZ or REG_DWORD.
 347  *
 348  * These values will be copied when necessary.
 349  */
 350 static void set_reg_key_ex(HKEY root, const WCHAR *path, const WCHAR *name, const void *value, DWORD type)
 351 {
 352     struct list *cursor;
 353     struct setting *s;
 354
 355     assert( path != NULL );
 356
 357     WINE_TRACE("path=%s, name=%s, value=%s\n", wine_dbgstr_w(path),
 358                wine_dbgstr_w(name), wine_dbgstr_w(value));
 359
 360     /* firstly, see if we already set this setting  */
 361     LIST_FOR_EACH( cursor, settings )
 362     {
 363         struct setting *s = LIST_ENTRY(cursor, struct setting, entry);
 364
 365         if (root != s->root) continue;
 366         if (lstrcmpiW(s->path, path) != 0) continue;
 367         if ((s->name && name) && lstrcmpiW(s->name, name) != 0) continue;
 368
 369         /* are we attempting a double delete? */
 370         if (!s->name && !name) return;
 371
 372         /* do we want to undelete this key? */
 373         if (!s->name && name) s->name = strdupW(name);
 374
 375         /* yes, we have already set it, so just replace the content and return  */
 376         HeapFree(GetProcessHeap(), 0, s->value);
 377         s->type = type;
 378         switch (type)
 379         {
 380             case REG_SZ:
 381                 s->value = value ? strdupW(value) : NULL;
 382                 break;
 383             case REG_DWORD:
 384                 s->value = HeapAlloc(GetProcessHeap(), 0, sizeof(DWORD));
 385                 memcpy( s->value, value, sizeof(DWORD) );
 386                 break;
 387         }
 388
 389         /* are we deleting this key? this won't remove any of the
 390          * children from the overlay so if the user adds it again in
 391          * that session it will appear to undelete the settings, but
 392          * in reality only the settings actually modified by the user
 393          * in that session will be restored. we might want to fix this
 394          * corner case in future by actually deleting all the children
 395          * here so that once it's gone, it's gone.
 396          */
 397         if (!name) s->name = NULL;
 398
 399         return;
 400     }
 401
 402     /* otherwise add a new setting for it  */
 403     s = HeapAlloc(GetProcessHeap(), 0, sizeof(struct setting));
 404     s->root  = root;
 405     s->path  = strdupW(path);
 406     s->name  = name  ? strdupW(name)  : NULL;
 407     s->type  = type;
 408     switch (type)
 409     {
 410         case REG_SZ:
 411             s->value = value ? strdupW(value) : NULL;
 412             break;
 413         case REG_DWORD:
 414             s->value = HeapAlloc(GetProcessHeap(), 0, sizeof(DWORD));
 415             memcpy( s->value, value, sizeof(DWORD) );
 416             break;
 417     }
 418
 419     list_add_tail(settings, &s->entry);
 420 }
 421
 422 void set_reg_key(HKEY root, const char *path, const char *name, const char *value)
 423 {
 424     WCHAR *wpath, *wname = NULL, *wvalue = NULL;
 425
 426     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 427     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 428
 429     if (name)
 430     {
 431         wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 432         MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 433     }
 434
 435     if (value)
 436     {
 437         wvalue = HeapAlloc(GetProcessHeap(), 0, (strlen(value)+1)*sizeof(WCHAR));
 438         MultiByteToWideChar(CP_ACP, 0, value, -1, wvalue, strlen(value)+1);
 439     }
 440
 441     set_reg_key_ex(root, wpath, wname, wvalue, REG_SZ);
 442
 443     HeapFree(GetProcessHeap(), 0, wpath);
 444     HeapFree(GetProcessHeap(), 0, wname);
 445     HeapFree(GetProcessHeap(), 0, wvalue);
 446 }
 447
 448 void set_reg_key_dword(HKEY root, const char *path, const char *name, DWORD value)
 449 {
 450     WCHAR *wpath, *wname;
 451
 452     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 453     wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 454
 455     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 456     MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 457
 458     set_reg_key_ex(root, wpath, wname, &value, REG_DWORD);
 459
 460     HeapFree(GetProcessHeap(), 0, wpath);
 461     HeapFree(GetProcessHeap(), 0, wname);
 462 }
 463
 464 void set_reg_keyW(HKEY root, const WCHAR *path, const WCHAR *name, const WCHAR *value)
 465 {
 466     set_reg_key_ex(root, path, name, value, REG_SZ);
 467 }
 468
 469 void set_reg_key_dwordW(HKEY root, const WCHAR *path, const WCHAR *name, DWORD value)
 470 {
 471     set_reg_key_ex(root, path, name, &value, REG_DWORD);
 472 }
 473
 474 /**
 475  * enumerates the value names at the given path, taking into account
 476  * the changes in the settings list.
 477  *
 478  * you are expected to HeapFree each element of the array, which is null
 479  * terminated, as well as the array itself.
 480  */
 481 WCHAR **enumerate_valuesW(HKEY root, WCHAR *path)
 482 {
 483     HKEY key;
 484     DWORD res, i = 0, valueslen = 0;
 485     WCHAR **values = NULL;
 486     struct list *cursor;
 487
 488     res = RegOpenKeyW(root, path, &key);
 489     if (res == ERROR_SUCCESS)
 490     {
 491         while (TRUE)
 492         {
 493             WCHAR name[1024];
 494             DWORD namesize = sizeof(name);
 495             BOOL removed = FALSE;
 496
 497             /* find out the needed size, allocate a buffer, read the value  */
 498             if ((res = RegEnumValueW(key, i, name, &namesize, NULL, NULL, NULL, NULL)) != ERROR_SUCCESS)
 499                 break;
 500
 501             WINE_TRACE("name=%s\n", wine_dbgstr_w(name));
 502
 503             /* check if this value name has been removed in the settings list  */
 504             LIST_FOR_EACH( cursor, settings )
 505             {
 506                 struct setting *s = LIST_ENTRY(cursor, struct setting, entry);
 507                 if (lstrcmpiW(s->path, path) != 0) continue;
 508                 if (lstrcmpiW(s->name, name) != 0) continue;
 509
 510                 if (!s->value)
 511                 {
 512                     WINE_TRACE("this key has been removed, so skipping\n");
 513                     removed = TRUE;
 514                     break;
 515                 }
 516             }
 517
 518             if (removed)            /* this value was deleted by the user, so don't include it */
 519             {
 520                 HeapFree(GetProcessHeap(), 0, name);
 521                 i++;
 522                 continue;
 523             }
 524
 525             /* grow the array if necessary, add buffer to it, iterate  */
 526             if (values) values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 527             else values = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR*));
 528
 529             values[valueslen++] = strdupW(name);
 530             WINE_TRACE("valueslen is now %d\n", valueslen);
 531             i++;
 532         }
 533     }
 534     else
 535     {
 536         WINE_WARN("failed opening registry key %s, res=0x%x\n",
 537                   wine_dbgstr_w(path), res);
 538     }
 539
 540     WINE_TRACE("adding settings in list but not registry\n");
 541
 542     /* now we have to add the values that aren't in the registry but are in the settings list */
 543     LIST_FOR_EACH( cursor, settings )
 544     {
 545         struct setting *setting = LIST_ENTRY(cursor, struct setting, entry);
 546         BOOL found = FALSE;
 547
 548         if (lstrcmpiW(setting->path, path) != 0) continue;
 549
 550         if (!setting->value) continue;
 551
 552         for (i = 0; i < valueslen; i++)
 553         {
 554             if (lstrcmpiW(setting->name, values[i]) == 0)
 555             {
 556                 found = TRUE;
 557                 break;
 558             }
 559         }
 560
 561         if (found) continue;
 562
 563         WINE_TRACE("%s in list but not registry\n", wine_dbgstr_w(setting->name));
 564
 565         /* otherwise it's been set by the user but isn't in the registry */
 566         if (values) values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 567         else values = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR*));
 568
 569         values[valueslen++] = strdupW(setting->name);
 570     }
 571
 572     WINE_TRACE("adding null terminator\n");
 573     if (values)
 574     {
 575         values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 576         values[valueslen] = NULL;
 577     }
 578
 579     RegCloseKey(key);
 580
 581     return values;
 582 }
 583
 584 char **enumerate_values(HKEY root, char *path)
 585 {
 586     WCHAR *wpath;
 587     WCHAR **wret;
 588     char **ret=NULL;
 589     int i=0, len=0;
 590
 591     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 592     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 593
 594     wret = enumerate_valuesW(root, wpath);
 595
 596     if (wret)
 597     {
 598         for(len=0; wret[len]; len++);
 599         ret = HeapAlloc(GetProcessHeap(), 0, (len+1)*sizeof(char*));
 600
 601         /* convert WCHAR ** to char ** and HeapFree each WCHAR * element on our way */
 602         for (i=0; i<len; i++)
 603         {
 604             ret[i] = HeapAlloc(GetProcessHeap(), 0,
 605                                (lstrlenW(wret[i]) + 1) * sizeof(char));
 606             WideCharToMultiByte(CP_ACP, 0, wret[i], -1, ret[i],
 607                                 lstrlenW(wret[i]) + 1, NULL, NULL);
 608             HeapFree(GetProcessHeap(), 0, wret[i]);
 609         }
 610         ret[len] = NULL;
 611     }
 612
 613     HeapFree(GetProcessHeap(), 0, wpath);
 614     HeapFree(GetProcessHeap(), 0, wret);
 615
 616     return ret;
 617 }
 618
 619 /**
 620  * returns true if the given key/value pair exists in the registry or
 621  * has been written to.
 622  */
 623 BOOL reg_key_exists(HKEY root, const char *path, const char *name)
 624 {
 625     char *val = get_reg_key(root, path, name, NULL);
 626
 627     if (val)
 628     {
 629         HeapFree(GetProcessHeap(), 0, val);
 630         return TRUE;
 631     }
 632
 633     return FALSE;
 634 }
 635
 636 static void process_setting(struct setting *s)
 637 {
 638     if (s->value)
 639     {
 640         WINE_TRACE("Setting %s:%s to '%s'\n", wine_dbgstr_w(s->path),
 641                    wine_dbgstr_w(s->name), wine_dbgstr_w(s->value));
 642         set_config_key(s->root, s->path, s->name, s->value, s->type);
 643     }
 644     else
 645     {
 646         /* NULL name means remove that path/section entirely */
 647         if (s->path && s->name) remove_value(s->root, s->path, s->name);
 648         else if (s->path && !s->name) RegDeleteTreeW(s->root, s->path);
 649     }
 650 }
 651
 652 void apply(void)
 653 {
 654     if (list_empty(settings)) return; /* we will be called for each page when the user clicks OK */
 655
 656     WINE_TRACE("()\n");
 657
 658     while (!list_empty(settings))
 659     {
 660         struct setting *s = (struct setting *) list_head(settings);
 661         process_setting(s);
 662         free_setting(s);
 663     }
 664 }
 665
 666 /* ================================== utility functions ============================ */
 667
 668 WCHAR* current_app = NULL; /* the app we are currently editing, or NULL if editing global */
 669
 670 /* returns a registry key path suitable for passing to addTransaction  */
 671 char *keypath(const char *section)
 672 {
 673     static char *result = NULL;
 674
 675     HeapFree(GetProcessHeap(), 0, result);
 676
 677     if (current_app)
 678     {
 679         result = HeapAlloc(GetProcessHeap(), 0, strlen("AppDefaults\\") + lstrlenW(current_app)*2 + 2 /* \\ */ + strlen(section) + 1 /* terminator */);
 680         wsprintf(result, "AppDefaults\\%ls", current_app);
 681         if (section[0]) sprintf( result + strlen(result), "\\%s", section );
 682     }
 683     else
 684     {
 685         result = strdupA(section);
 686     }
 687
 688     return result;
 689 }
 690
 691 WCHAR *keypathW(const WCHAR *section)
 692 {
 693     static const WCHAR appdefaultsW[] = {'A','p','p','D','e','f','a','u','l','t','s','\\',0};
 694     static WCHAR *result = NULL;
 695
 696     HeapFree(GetProcessHeap(), 0, result);
 697
 698     if (current_app)
 699     {
 700         DWORD len = sizeof(appdefaultsW) + (lstrlenW(current_app) + lstrlenW(section) + 1) * sizeof(WCHAR);
 701         result = HeapAlloc(GetProcessHeap(), 0, len );
 702         lstrcpyW( result, appdefaultsW );
 703         lstrcatW( result, current_app );
 704         if (section[0])
 705         {
 706             len = lstrlenW(result);
 707             result[len++] = '\\';
 708             lstrcpyW( result + len, section );
 709         }
 710     }
 711     else
 712     {
 713         result = strdupW(section);
 714     }
 715
 716     return result;
 717 }
 718
 719 void PRINTERROR(void)
 720 {
 721         LPSTR msg;
 722
 723         FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
 724                        0, GetLastError(), MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),
 725                        (LPSTR)&msg, 0, NULL);
 726
 727         /* eliminate trailing newline, is this a Wine bug? */
 728         *(strrchr(msg, '\r')) = '\0';
 729
 730         WINE_TRACE("error: '%s'\n", msg);
 731 }
 732
 733 int initialize(HINSTANCE hInstance)
 734 {
 735     DWORD res = RegCreateKey(HKEY_CURRENT_USER, WINE_KEY_ROOT, &config_key);
 736
 737     if (res != ERROR_SUCCESS) {
 738         WINE_ERR("RegOpenKey failed on wine config key (%d)\n", res);
 739         return 1;
 740     }
 741
 742     /* load any menus */
 743     hPopupMenus = LoadMenu(hInstance, MAKEINTRESOURCE(IDR_WINECFG));
 744
 745     /* we could probably just have the list as static data  */
 746     settings = HeapAlloc(GetProcessHeap(), 0, sizeof(struct list));
 747     list_init(settings);
 748
 749     return 0;
 750 }