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 /* removes the requested subkey from the registry, assuming it exists */
 215 static LONG remove_path(HKEY root, WCHAR *section) {
 216     HKEY branch_key;
 217     DWORD max_sub_key_len;
 218     DWORD subkeys;
 219     DWORD curr_len;
 220     LONG ret = ERROR_SUCCESS;
 221     long int i;
 222     WCHAR *buffer;
 223
 224     WINE_TRACE("section=%s\n", wine_dbgstr_w(section));
 225
 226     if ((ret = RegOpenKeyW(root, section, &branch_key)) != ERROR_SUCCESS)
 227         return ret;
 228
 229     /* get size information and resize the buffers if necessary */
 230     if ((ret = RegQueryInfoKeyW(branch_key, NULL, NULL, NULL,
 231                                &subkeys, &max_sub_key_len,
 232                                NULL, NULL, NULL, NULL, NULL, NULL
 233                               )) != ERROR_SUCCESS)
 234         return ret;
 235
 236     curr_len = lstrlenW(section);
 237     buffer = HeapAlloc(GetProcessHeap(), 0, (max_sub_key_len + curr_len + 1)*sizeof(WCHAR));
 238     lstrcpyW(buffer, section);
 239
 240     buffer[curr_len] = '\\';
 241     for (i = subkeys - 1; i >= 0; i--)
 242     {
 243         DWORD buf_len = max_sub_key_len - curr_len - 1;
 244
 245         ret = RegEnumKeyExW(branch_key, i, buffer + curr_len + 1,
 246                            &buf_len, NULL, NULL, NULL, NULL);
 247         if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA &&
 248             ret != ERROR_NO_MORE_ITEMS)
 249             break;
 250         else
 251             remove_path(root, buffer);
 252     }
 253     HeapFree(GetProcessHeap(), 0, buffer);
 254     RegCloseKey(branch_key);
 255
 256     return RegDeleteKeyW(root, section);
 257 }
 258
 259
 260 /* ========================================================================= */
 261
 262 /* This code exists for the following reasons:
 263  *
 264  * - It makes working with the registry easier
 265  * - By storing a mini cache of the registry, we can more easily implement
 266  *   cancel/revert and apply. The 'settings list' is an overlay on top of
 267  *   the actual registry data that we can write out at will.
 268  *
 269  * Rather than model a tree in memory, we simply store each absolute (rooted
 270  * at the config key) path.
 271  *
 272  */
 273
 274 struct setting
 275 {
 276     struct list entry;
 277     HKEY root;    /* the key on which path is rooted */
 278     WCHAR *path;   /* path in the registry rooted at root  */
 279     WCHAR *name;   /* name of the registry value. if null, this means delete the key  */
 280     WCHAR *value;  /* contents of the registry value. if null, this means delete the value  */
 281     DWORD type;   /* type of registry value. REG_SZ or REG_DWORD for now */
 282 };
 283
 284 struct list *settings;
 285
 286 static void free_setting(struct setting *setting)
 287 {
 288     assert( setting != NULL );
 289     assert( setting->path );
 290
 291     WINE_TRACE("destroying %p: %s\n", setting,
 292                wine_dbgstr_w(setting->path));
 293
 294     HeapFree(GetProcessHeap(), 0, setting->path);
 295     HeapFree(GetProcessHeap(), 0, setting->name);
 296     HeapFree(GetProcessHeap(), 0, setting->value);
 297
 298     list_remove(&setting->entry);
 299
 300     HeapFree(GetProcessHeap(), 0, setting);
 301 }
 302
 303 /**
 304  * Returns the contents of the value at path. If not in the settings
 305  * list, it will be fetched from the registry - failing that, the
 306  * default will be used.
 307  *
 308  * If already in the list, the contents as given there will be
 309  * returned. You are expected to HeapFree the result.
 310  */
 311 WCHAR *get_reg_keyW(HKEY root, const WCHAR *path, const WCHAR *name, const WCHAR *def)
 312 {
 313     struct list *cursor;
 314     struct setting *s;
 315     WCHAR *val;
 316
 317     WINE_TRACE("path=%s, name=%s, def=%s\n", wine_dbgstr_w(path),
 318                wine_dbgstr_w(name), wine_dbgstr_w(def));
 319
 320     /* check if it's in the list */
 321     LIST_FOR_EACH( cursor, settings )
 322     {
 323         s = LIST_ENTRY(cursor, struct setting, entry);
 324
 325         if (root != s->root) continue;
 326         if (lstrcmpiW(path, s->path) != 0) continue;
 327         if (!s->name) continue;
 328         if (lstrcmpiW(name, s->name) != 0) continue;
 329
 330         WINE_TRACE("found %s:%s in settings list, returning %s\n",
 331                    wine_dbgstr_w(path), wine_dbgstr_w(name),
 332                    wine_dbgstr_w(s->value));
 333         return s->value ? strdupW(s->value) : NULL;
 334     }
 335
 336     /* no, so get from the registry */
 337     val = get_config_key(root, path, name, def);
 338
 339     WINE_TRACE("returning %s\n", wine_dbgstr_w(val));
 340
 341     return val;
 342 }
 343
 344 char *get_reg_key(HKEY root, const char *path, const char *name, const char *def)
 345 {
 346     WCHAR *wpath, *wname, *wdef = NULL, *wRet = NULL;
 347     char *szRet = NULL;
 348     int len;
 349
 350     WINE_TRACE("path=%s, name=%s, def=%s\n", path, name, def);
 351
 352     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 353     wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 354
 355     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 356     MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 357
 358     if (def)
 359     {
 360         wdef = HeapAlloc(GetProcessHeap(), 0, (strlen(def)+1)*sizeof(WCHAR));
 361         MultiByteToWideChar(CP_ACP, 0, def, -1, wdef, strlen(def)+1);
 362     }
 363
 364     wRet = get_reg_keyW(root, wpath, wname, wdef);
 365
 366     len = WideCharToMultiByte(CP_ACP, 0, wRet, -1, szRet, 0, NULL, NULL);
 367     szRet = HeapAlloc(GetProcessHeap(), 0, len);
 368     WideCharToMultiByte(CP_ACP, 0, wRet, -1, szRet, len, NULL, NULL);
 369
 370     HeapFree(GetProcessHeap(), 0, wpath);
 371     HeapFree(GetProcessHeap(), 0, wname);
 372     HeapFree(GetProcessHeap(), 0, wdef);
 373     HeapFree(GetProcessHeap(), 0, wRet);
 374
 375     return szRet;
 376 }
 377
 378 /**
 379  * Used to set a registry key.
 380  *
 381  * path is rooted at the config key, ie use "Version" or
 382  * "AppDefaults\\fooapp.exe\\Version". You can use keypath()
 383  * to get such a string.
 384  *
 385  * name is the value name, or NULL to delete the path.
 386  *
 387  * value is what to set the value to, or NULL to delete it.
 388  *
 389  * type is REG_SZ or REG_DWORD.
 390  *
 391  * These values will be copied when necessary.
 392  */
 393 static void set_reg_key_ex(HKEY root, const WCHAR *path, const WCHAR *name, const void *value, DWORD type)
 394 {
 395     struct list *cursor;
 396     struct setting *s;
 397
 398     assert( path != NULL );
 399
 400     WINE_TRACE("path=%s, name=%s, value=%p\n", wine_dbgstr_w(path),
 401                wine_dbgstr_w(name), wine_dbgstr_w(value));
 402
 403     /* firstly, see if we already set this setting  */
 404     LIST_FOR_EACH( cursor, settings )
 405     {
 406         struct setting *s = LIST_ENTRY(cursor, struct setting, entry);
 407
 408         if (root != s->root) continue;
 409         if (lstrcmpiW(s->path, path) != 0) continue;
 410         if ((s->name && name) && lstrcmpiW(s->name, name) != 0) continue;
 411
 412         /* are we attempting a double delete? */
 413         if (!s->name && !name) return;
 414
 415         /* do we want to undelete this key? */
 416         if (!s->name && name) s->name = strdupW(name);
 417
 418         /* yes, we have already set it, so just replace the content and return  */
 419         HeapFree(GetProcessHeap(), 0, s->value);
 420         s->type = type;
 421         switch (type)
 422         {
 423             case REG_SZ:
 424                 s->value = value ? strdupW(value) : NULL;
 425                 break;
 426             case REG_DWORD:
 427                 s->value = HeapAlloc(GetProcessHeap(), 0, sizeof(DWORD));
 428                 memcpy( s->value, value, sizeof(DWORD) );
 429                 break;
 430         }
 431
 432         /* are we deleting this key? this won't remove any of the
 433          * children from the overlay so if the user adds it again in
 434          * that session it will appear to undelete the settings, but
 435          * in reality only the settings actually modified by the user
 436          * in that session will be restored. we might want to fix this
 437          * corner case in future by actually deleting all the children
 438          * here so that once it's gone, it's gone.
 439          */
 440         if (!name) s->name = NULL;
 441
 442         return;
 443     }
 444
 445     /* otherwise add a new setting for it  */
 446     s = HeapAlloc(GetProcessHeap(), 0, sizeof(struct setting));
 447     s->root  = root;
 448     s->path  = strdupW(path);
 449     s->name  = name  ? strdupW(name)  : NULL;
 450     s->type  = type;
 451     switch (type)
 452     {
 453         case REG_SZ:
 454             s->value = value ? strdupW(value) : NULL;
 455             break;
 456         case REG_DWORD:
 457             s->value = HeapAlloc(GetProcessHeap(), 0, sizeof(DWORD));
 458             memcpy( s->value, value, sizeof(DWORD) );
 459             break;
 460     }
 461
 462     list_add_tail(settings, &s->entry);
 463 }
 464
 465 void set_reg_key(HKEY root, const char *path, const char *name, const char *value)
 466 {
 467     WCHAR *wpath, *wname, *wvalue = NULL;
 468
 469     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 470     wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 471
 472     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 473     MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 474
 475     if (value)
 476     {
 477         wvalue = HeapAlloc(GetProcessHeap(), 0, (strlen(value)+1)*sizeof(WCHAR));
 478         MultiByteToWideChar(CP_ACP, 0, value, -1, wvalue, strlen(value)+1);
 479     }
 480
 481     set_reg_key_ex(root, wpath, wname, wvalue, REG_SZ);
 482
 483     HeapFree(GetProcessHeap(), 0, wpath);
 484     HeapFree(GetProcessHeap(), 0, wname);
 485     HeapFree(GetProcessHeap(), 0, wvalue);
 486 }
 487
 488 void set_reg_key_dword(HKEY root, const char *path, const char *name, DWORD value)
 489 {
 490     WCHAR *wpath, *wname;
 491
 492     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 493     wname = HeapAlloc(GetProcessHeap(), 0, (strlen(name)+1)*sizeof(WCHAR));
 494
 495     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 496     MultiByteToWideChar(CP_ACP, 0, name, -1, wname, strlen(name)+1);
 497
 498     set_reg_key_ex(root, wpath, wname, &value, REG_DWORD);
 499
 500     HeapFree(GetProcessHeap(), 0, wpath);
 501     HeapFree(GetProcessHeap(), 0, wname);
 502 }
 503
 504 /**
 505  * enumerates the value names at the given path, taking into account
 506  * the changes in the settings list.
 507  *
 508  * you are expected to HeapFree each element of the array, which is null
 509  * terminated, as well as the array itself.
 510  */
 511 WCHAR **enumerate_valuesW(HKEY root, WCHAR *path)
 512 {
 513     HKEY key;
 514     DWORD res, i = 0;
 515     WCHAR **values = NULL;
 516     int valueslen = 0;
 517     struct list *cursor;
 518
 519     res = RegOpenKeyW(root, path, &key);
 520     if (res == ERROR_SUCCESS)
 521     {
 522         while (TRUE)
 523         {
 524             WCHAR name[1024];
 525             DWORD namesize = sizeof(name);
 526             BOOL removed = FALSE;
 527
 528             /* find out the needed size, allocate a buffer, read the value  */
 529             if ((res = RegEnumValueW(key, i, name, &namesize, NULL, NULL, NULL, NULL)) != ERROR_SUCCESS)
 530                 break;
 531
 532             WINE_TRACE("name=%s\n", wine_dbgstr_w(name));
 533
 534             /* check if this value name has been removed in the settings list  */
 535             LIST_FOR_EACH( cursor, settings )
 536             {
 537                 struct setting *s = LIST_ENTRY(cursor, struct setting, entry);
 538                 if (lstrcmpiW(s->path, path) != 0) continue;
 539                 if (lstrcmpiW(s->name, name) != 0) continue;
 540
 541                 if (!s->value)
 542                 {
 543                     WINE_TRACE("this key has been removed, so skipping\n");
 544                     removed = TRUE;
 545                     break;
 546                 }
 547             }
 548
 549             if (removed)            /* this value was deleted by the user, so don't include it */
 550             {
 551                 HeapFree(GetProcessHeap(), 0, name);
 552                 i++;
 553                 continue;
 554             }
 555
 556             /* grow the array if necessary, add buffer to it, iterate  */
 557             if (values) values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 558             else values = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR*));
 559
 560             values[valueslen++] = strdupW(name);
 561             WINE_TRACE("valueslen is now %d\n", valueslen);
 562             i++;
 563         }
 564     }
 565     else
 566     {
 567         WINE_WARN("failed opening registry key %s, res=0x%x\n",
 568                   wine_dbgstr_w(path), res);
 569     }
 570
 571     WINE_TRACE("adding settings in list but not registry\n");
 572
 573     /* now we have to add the values that aren't in the registry but are in the settings list */
 574     LIST_FOR_EACH( cursor, settings )
 575     {
 576         struct setting *setting = LIST_ENTRY(cursor, struct setting, entry);
 577         BOOL found = FALSE;
 578
 579         if (lstrcmpiW(setting->path, path) != 0) continue;
 580
 581         if (!setting->value) continue;
 582
 583         for (i = 0; i < valueslen; i++)
 584         {
 585             if (lstrcmpiW(setting->name, values[i]) == 0)
 586             {
 587                 found = TRUE;
 588                 break;
 589             }
 590         }
 591
 592         if (found) continue;
 593
 594         WINE_TRACE("%s in list but not registry\n", wine_dbgstr_w(setting->name));
 595
 596         /* otherwise it's been set by the user but isn't in the registry */
 597         if (values) values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 598         else values = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR*));
 599
 600         values[valueslen++] = strdupW(setting->name);
 601     }
 602
 603     WINE_TRACE("adding null terminator\n");
 604     if (values)
 605     {
 606         values = HeapReAlloc(GetProcessHeap(), 0, values, sizeof(WCHAR*) * (valueslen + 1));
 607         values[valueslen] = NULL;
 608     }
 609
 610     RegCloseKey(key);
 611
 612     return values;
 613 }
 614
 615 char **enumerate_values(HKEY root, char *path)
 616 {
 617     WCHAR *wpath;
 618     WCHAR **wret;
 619     char **ret=NULL;
 620     int i=0, len=0;
 621
 622     wpath = HeapAlloc(GetProcessHeap(), 0, (strlen(path)+1)*sizeof(WCHAR));
 623     MultiByteToWideChar(CP_ACP, 0, path, -1, wpath, strlen(path)+1);
 624
 625     wret = enumerate_valuesW(root, wpath);
 626
 627     if (wret)
 628     {
 629         for(len=0; wret[len]; len++);
 630         ret = HeapAlloc(GetProcessHeap(), 0, (len+1)*sizeof(char*));
 631
 632         /* convert WCHAR ** to char ** and HeapFree each WCHAR * element on our way */
 633         for (i=0; i<len; i++)
 634         {
 635             ret[i] = HeapAlloc(GetProcessHeap(), 0,
 636                                (lstrlenW(wret[i]) + 1) * sizeof(char));
 637             WideCharToMultiByte(CP_ACP, 0, wret[i], -1, ret[i],
 638                                 lstrlenW(wret[i]) + 1, NULL, NULL);
 639             HeapFree(GetProcessHeap(), 0, wret[i]);
 640         }
 641         ret[len] = NULL;
 642     }
 643
 644     HeapFree(GetProcessHeap(), 0, wpath);
 645     HeapFree(GetProcessHeap(), 0, wret);
 646
 647     return ret;
 648 }
 649
 650 /**
 651  * returns true if the given key/value pair exists in the registry or
 652  * has been written to.
 653  */
 654 BOOL reg_key_exists(HKEY root, const char *path, const char *name)
 655 {
 656     char *val = get_reg_key(root, path, name, NULL);
 657
 658     if (val)
 659     {
 660         HeapFree(GetProcessHeap(), 0, val);
 661         return TRUE;
 662     }
 663
 664     return FALSE;
 665 }
 666
 667 static void process_setting(struct setting *s)
 668 {
 669     if (s->value)
 670     {
 671         WINE_TRACE("Setting %s:%s to '%s'\n", wine_dbgstr_w(s->path),
 672                    wine_dbgstr_w(s->name), wine_dbgstr_w(s->value));
 673         set_config_key(s->root, s->path, s->name, s->value, s->type);
 674     }
 675     else
 676     {
 677         /* NULL name means remove that path/section entirely */
 678         if (s->path && s->name) remove_value(s->root, s->path, s->name);
 679         else if (s->path && !s->name) remove_path(s->root, s->path);
 680     }
 681 }
 682
 683 void apply(void)
 684 {
 685     if (list_empty(settings)) return; /* we will be called for each page when the user clicks OK */
 686
 687     WINE_TRACE("()\n");
 688
 689     while (!list_empty(settings))
 690     {
 691         struct setting *s = (struct setting *) list_head(settings);
 692         process_setting(s);
 693         free_setting(s);
 694     }
 695 }
 696
 697 /* ================================== utility functions ============================ */
 698
 699 WCHAR* current_app = NULL; /* the app we are currently editing, or NULL if editing global */
 700
 701 /* returns a registry key path suitable for passing to addTransaction  */
 702 char *keypath(const char *section)
 703 {
 704     static char *result = NULL;
 705
 706     HeapFree(GetProcessHeap(), 0, result);
 707
 708     if (current_app)
 709     {
 710         result = HeapAlloc(GetProcessHeap(), 0, strlen("AppDefaults\\") + lstrlenW(current_app)*2 + 2 /* \\ */ + strlen(section) + 1 /* terminator */);
 711         wsprintf(result, "AppDefaults\\%ls", current_app);
 712         if (section[0]) sprintf( result + strlen(result), "\\%s", section );
 713     }
 714     else
 715     {
 716         result = strdupA(section);
 717     }
 718
 719     return result;
 720 }
 721
 722 void PRINTERROR(void)
 723 {
 724         LPSTR msg;
 725
 726         FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
 727                        0, GetLastError(), MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),
 728                        (LPSTR)&msg, 0, NULL);
 729
 730         /* eliminate trailing newline, is this a Wine bug? */
 731         *(strrchr(msg, '\r')) = '\0';
 732
 733         WINE_TRACE("error: '%s'\n", msg);
 734 }
 735
 736 int initialize(HINSTANCE hInstance)
 737 {
 738     DWORD res = RegCreateKey(HKEY_CURRENT_USER, WINE_KEY_ROOT, &config_key);
 739
 740     if (res != ERROR_SUCCESS) {
 741         WINE_ERR("RegOpenKey failed on wine config key (%d)\n", res);
 742         return 1;
 743     }
 744
 745     /* load any menus */
 746     hPopupMenus = LoadMenu(hInstance, MAKEINTRESOURCE(IDR_WINECFG));
 747
 748     /* we could probably just have the list as static data  */
 749     settings = HeapAlloc(GetProcessHeap(), 0, sizeof(struct list));
 750     list_init(settings);
 751
 752     return 0;
 753 }