src/msw/utils.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/utils.cpp
   3 // Purpose:     Various utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/utils.h"
  29     #include "wx/app.h"
  30     #include "wx/intl.h"
  31     #include "wx/log.h"
  32 #endif  //WX_PRECOMP
  33
  34 #include "wx/apptrait.h"
  35 #include "wx/dynlib.h"
  36 #include "wx/dynload.h"
  37
  38 #include "wx/confbase.h"        // for wxExpandEnvVars()
  39
  40 #include "wx/msw/private.h"     // includes <windows.h>
  41 #include "wx/msw/missing.h"     // CHARSET_HANGUL
  42
  43 #if defined(__GNUWIN32_OLD__) || defined(__WXWINCE__) \
  44     || defined(__CYGWIN32__)
  45     // apparently we need to include winsock.h to get WSADATA and other stuff
  46     // used in wxGetFullHostName() with the old mingw32 versions
  47     #include <winsock.h>
  48 #endif
  49
  50 #include "wx/timer.h"
  51
  52 #if !defined(__GNUWIN32__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
  53     #include <direct.h>
  54
  55     #ifndef __MWERKS__
  56         #include <dos.h>
  57     #endif
  58 #endif  //GNUWIN32
  59
  60 #if defined(__CYGWIN__)
  61     #include <sys/unistd.h>
  62     #include <sys/stat.h>
  63     #include <sys/cygwin.h> // for cygwin_conv_to_full_win32_path()
  64 #endif  //GNUWIN32
  65
  66 #ifdef __BORLANDC__ // Please someone tell me which version of Borland needs
  67                     // this (3.1 I believe) and how to test for it.
  68                     // If this works for Borland 4.0 as well, then no worries.
  69     #include <dir.h>
  70 #endif
  71
  72 // VZ: there is some code using NetXXX() functions to get the full user name:
  73 //     I don't think it's a good idea because they don't work under Win95 and
  74 //     seem to return the same as wxGetUserId() under NT. If you really want
  75 //     to use them, just #define USE_NET_API
  76 #undef USE_NET_API
  77
  78 #ifdef USE_NET_API
  79     #include <lm.h>
  80 #endif // USE_NET_API
  81
  82 #if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
  83     #ifndef __UNIX__
  84         #include <io.h>
  85     #endif
  86
  87     #ifndef __GNUWIN32__
  88         #include <shellapi.h>
  89     #endif
  90 #endif
  91
  92 #ifndef __WATCOMC__
  93     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  94         #include <errno.h>
  95     #endif
  96 #endif
  97
  98 // For wxKillAllChildren
  99 #include <tlhelp32.h>
 100
 101 // ----------------------------------------------------------------------------
 102 // constants
 103 // ----------------------------------------------------------------------------
 104
 105 // In the WIN.INI file
 106 static const wxChar WX_SECTION[] = wxT("wxWindows");
 107 static const wxChar eUSERNAME[]  = wxT("UserName");
 108
 109 // ============================================================================
 110 // implementation
 111 // ============================================================================
 112
 113 // ----------------------------------------------------------------------------
 114 // get host name and related
 115 // ----------------------------------------------------------------------------
 116
 117 // Get hostname only (without domain name)
 118 bool wxGetHostName(wxChar *buf, int maxSize)
 119 {
 120 #if defined(__WXWINCE__)
 121     return false;
 122 #elif defined(__WIN32__) && !defined(__WXMICROWIN__)
 123     DWORD nSize = maxSize;
 124     if ( !::GetComputerName(buf, &nSize) )
 125     {
 126         wxLogLastError(wxT("GetComputerName"));
 127
 128         return false;
 129     }
 130
 131     return true;
 132 #else
 133     wxChar *sysname;
 134     const wxChar *default_host = wxT("noname");
 135
 136     if ((sysname = wxGetenv(wxT("SYSTEM_NAME"))) == NULL) {
 137         GetProfileString(WX_SECTION, eHOSTNAME, default_host, buf, maxSize - 1);
 138     } else
 139         wxStrncpy(buf, sysname, maxSize - 1);
 140     buf[maxSize] = wxT('\0');
 141     return *buf ? true : false;
 142 #endif
 143 }
 144
 145 // get full hostname (with domain name if possible)
 146 bool wxGetFullHostName(wxChar *buf, int maxSize)
 147 {
 148 #if !defined( __WXMICROWIN__) && wxUSE_DYNAMIC_LOADER
 149     // TODO should use GetComputerNameEx() when available
 150
 151     // we don't want to always link with Winsock DLL as we might not use it at
 152     // all, so load it dynamically here if needed (and don't complain if it is
 153     // missing, we handle this)
 154     wxLogNull noLog;
 155
 156     wxDynamicLibrary dllWinsock(_T("ws2_32.dll"), wxDL_VERBATIM);
 157     if ( dllWinsock.IsLoaded() )
 158     {
 159         typedef int (PASCAL *WSAStartup_t)(WORD, WSADATA *);
 160         typedef int (PASCAL *gethostname_t)(char *, int);
 161         typedef hostent* (PASCAL *gethostbyname_t)(const char *);
 162         typedef hostent* (PASCAL *gethostbyaddr_t)(const char *, int , int);
 163         typedef int (PASCAL *WSACleanup_t)(void);
 164
 165         #define LOAD_WINSOCK_FUNC(func)                                       \
 166             func ## _t                                                        \
 167                 pfn ## func = (func ## _t)dllWinsock.GetSymbol(_T(#func))
 168
 169         LOAD_WINSOCK_FUNC(WSAStartup);
 170
 171         WSADATA wsa;
 172         if ( pfnWSAStartup && pfnWSAStartup(MAKEWORD(1, 1), &wsa) == 0 )
 173         {
 174             LOAD_WINSOCK_FUNC(gethostname);
 175
 176             wxString host;
 177             if ( pfngethostname )
 178             {
 179                 char bufA[256];
 180                 if ( pfngethostname(bufA, WXSIZEOF(bufA)) == 0 )
 181                 {
 182                     // gethostname() won't usually include the DNS domain name,
 183                     // for this we need to work a bit more
 184                     if ( !strchr(bufA, '.') )
 185                     {
 186                         LOAD_WINSOCK_FUNC(gethostbyname);
 187
 188                         struct hostent *pHostEnt = pfngethostbyname
 189                                                     ? pfngethostbyname(bufA)
 190                                                     : NULL;
 191
 192                         if ( pHostEnt )
 193                         {
 194                             // Windows will use DNS internally now
 195                             LOAD_WINSOCK_FUNC(gethostbyaddr);
 196
 197                             pHostEnt = pfngethostbyaddr
 198                                         ? pfngethostbyaddr(pHostEnt->h_addr,
 199                                                            4, AF_INET)
 200                                         : NULL;
 201                         }
 202
 203                         if ( pHostEnt )
 204                         {
 205                             host = wxString::FromAscii(pHostEnt->h_name);
 206                         }
 207                     }
 208                 }
 209             }
 210
 211             LOAD_WINSOCK_FUNC(WSACleanup);
 212             if ( pfnWSACleanup )
 213                 pfnWSACleanup();
 214
 215
 216             if ( !host.empty() )
 217             {
 218                 wxStrncpy(buf, host, maxSize);
 219
 220                 return true;
 221             }
 222         }
 223     }
 224 #endif // !__WXMICROWIN__
 225
 226     return wxGetHostName(buf, maxSize);
 227 }
 228
 229 // Get user ID e.g. jacs
 230 bool wxGetUserId(wxChar *buf, int maxSize)
 231 {
 232 #if defined(__WXWINCE__)
 233     return false;
 234 #elif defined(__WIN32__) && !defined(__WXMICROWIN__)
 235     DWORD nSize = maxSize;
 236     if ( ::GetUserName(buf, &nSize) == 0 )
 237     {
 238         // actually, it does happen on Win9x if the user didn't log on
 239         DWORD res = ::GetEnvironmentVariable(wxT("username"), buf, maxSize);
 240         if ( res == 0 )
 241         {
 242             // not found
 243             return false;
 244         }
 245     }
 246
 247     return true;
 248 #else   // __WXMICROWIN__
 249     wxChar *user;
 250     const wxChar *default_id = wxT("anonymous");
 251
 252     // Can't assume we have NIS (PC-NFS) or some other ID daemon
 253     // So we ...
 254     if (  (user = wxGetenv(wxT("USER"))) == NULL &&
 255             (user = wxGetenv(wxT("LOGNAME"))) == NULL )
 256     {
 257         // Use wxWidgets configuration data (comming soon)
 258         GetProfileString(WX_SECTION, eUSERID, default_id, buf, maxSize - 1);
 259     }
 260     else
 261     {
 262         wxStrncpy(buf, user, maxSize - 1);
 263     }
 264
 265     return *buf ? true : false;
 266 #endif
 267 }
 268
 269 // Get user name e.g. Julian Smart
 270 bool wxGetUserName(wxChar *buf, int maxSize)
 271 {
 272 #if defined(__WXWINCE__)
 273     return false;
 274 #elif defined(USE_NET_API)
 275     CHAR szUserName[256];
 276     if ( !wxGetUserId(szUserName, WXSIZEOF(szUserName)) )
 277         return false;
 278
 279     // TODO how to get the domain name?
 280     CHAR *szDomain = "";
 281
 282     // the code is based on the MSDN example (also see KB article Q119670)
 283     WCHAR wszUserName[256];          // Unicode user name
 284     WCHAR wszDomain[256];
 285     LPBYTE ComputerName;
 286
 287     USER_INFO_2 *ui2;         // User structure
 288
 289     // Convert ANSI user name and domain to Unicode
 290     MultiByteToWideChar( CP_ACP, 0, szUserName, strlen(szUserName)+1,
 291             wszUserName, WXSIZEOF(wszUserName) );
 292     MultiByteToWideChar( CP_ACP, 0, szDomain, strlen(szDomain)+1,
 293             wszDomain, WXSIZEOF(wszDomain) );
 294
 295     // Get the computer name of a DC for the domain.
 296     if ( NetGetDCName( NULL, wszDomain, &ComputerName ) != NERR_Success )
 297     {
 298         wxLogError(wxT("Can not find domain controller"));
 299
 300         goto error;
 301     }
 302
 303     // Look up the user on the DC
 304     NET_API_STATUS status = NetUserGetInfo( (LPWSTR)ComputerName,
 305             (LPWSTR)&wszUserName,
 306             2, // level - we want USER_INFO_2
 307             (LPBYTE *) &ui2 );
 308     switch ( status )
 309     {
 310         case NERR_Success:
 311             // ok
 312             break;
 313
 314         case NERR_InvalidComputer:
 315             wxLogError(wxT("Invalid domain controller name."));
 316
 317             goto error;
 318
 319         case NERR_UserNotFound:
 320             wxLogError(wxT("Invalid user name '%s'."), szUserName);
 321
 322             goto error;
 323
 324         default:
 325             wxLogSysError(wxT("Can't get information about user"));
 326
 327             goto error;
 328     }
 329
 330     // Convert the Unicode full name to ANSI
 331     WideCharToMultiByte( CP_ACP, 0, ui2->usri2_full_name, -1,
 332             buf, maxSize, NULL, NULL );
 333
 334     return true;
 335
 336 error:
 337     wxLogError(wxT("Couldn't look up full user name."));
 338
 339     return false;
 340 #else  // !USE_NET_API
 341     // Could use NIS, MS-Mail or other site specific programs
 342     // Use wxWidgets configuration data
 343     bool ok = GetProfileString(WX_SECTION, eUSERNAME, wxEmptyString, buf, maxSize - 1) != 0;
 344     if ( !ok )
 345     {
 346         ok = wxGetUserId(buf, maxSize);
 347     }
 348
 349     if ( !ok )
 350     {
 351         wxStrncpy(buf, wxT("Unknown User"), maxSize);
 352     }
 353 #endif // Win32/16
 354
 355     return true;
 356 }
 357
 358 const wxChar* wxGetHomeDir(wxString *pstr)
 359 {
 360     wxString& strDir = *pstr;
 361
 362     // first branch is for Cygwin
 363 #if defined(__UNIX__)
 364     const wxChar *szHome = wxGetenv("HOME");
 365     if ( szHome == NULL ) {
 366       // we're homeless...
 367       wxLogWarning(_("can't find user's HOME, using current directory."));
 368       strDir = wxT(".");
 369     }
 370     else
 371        strDir = szHome;
 372
 373     // add a trailing slash if needed
 374     if ( strDir.Last() != wxT('/') )
 375       strDir << wxT('/');
 376
 377     #ifdef __CYGWIN__
 378         // Cygwin returns unix type path but that does not work well
 379         static wxChar windowsPath[MAX_PATH];
 380         cygwin_conv_to_full_win32_path(strDir, windowsPath);
 381         strDir = windowsPath;
 382     #endif
 383 #elif defined(__WXWINCE__)
 384       // Nothing
 385 #else
 386     strDir.clear();
 387
 388     // If we have a valid HOME directory, as is used on many machines that
 389     // have unix utilities on them, we should use that.
 390     const wxChar *szHome = wxGetenv(wxT("HOME"));
 391
 392     if ( szHome != NULL )
 393     {
 394         strDir = szHome;
 395     }
 396     else // no HOME, try HOMEDRIVE/PATH
 397     {
 398         szHome = wxGetenv(wxT("HOMEDRIVE"));
 399         if ( szHome != NULL )
 400             strDir << szHome;
 401         szHome = wxGetenv(wxT("HOMEPATH"));
 402
 403         if ( szHome != NULL )
 404         {
 405             strDir << szHome;
 406
 407             // the idea is that under NT these variables have default values
 408             // of "%systemdrive%:" and "\\". As we don't want to create our
 409             // config files in the root directory of the system drive, we will
 410             // create it in our program's dir. However, if the user took care
 411             // to set HOMEPATH to something other than "\\", we suppose that he
 412             // knows what he is doing and use the supplied value.
 413             if ( wxStrcmp(szHome, wxT("\\")) == 0 )
 414                 strDir.clear();
 415         }
 416     }
 417
 418     if ( strDir.empty() )
 419     {
 420         // If we have a valid USERPROFILE directory, as is the case in
 421         // Windows NT, 2000 and XP, we should use that as our home directory.
 422         szHome = wxGetenv(wxT("USERPROFILE"));
 423
 424         if ( szHome != NULL )
 425             strDir = szHome;
 426     }
 427
 428     if ( !strDir.empty() )
 429     {
 430         // sometimes the value of HOME may be "%USERPROFILE%", so reexpand the
 431         // value once again, it shouldn't hurt anyhow
 432         strDir = wxExpandEnvVars(strDir);
 433     }
 434     else // fall back to the program directory
 435     {
 436         // extract the directory component of the program file name
 437         wxSplitPath(wxGetFullModuleName(), &strDir, NULL, NULL);
 438     }
 439 #endif  // UNIX/Win
 440
 441     return strDir.c_str();
 442 }
 443
 444 wxChar *wxGetUserHome(const wxString& WXUNUSED(user))
 445 {
 446     // VZ: the old code here never worked for user != "" anyhow! Moreover, it
 447     //     returned sometimes a malloc()'d pointer, sometimes a pointer to a
 448     //     static buffer and sometimes I don't even know what.
 449     static wxString s_home;
 450
 451     return (wxChar *)wxGetHomeDir(&s_home);
 452 }
 453
 454 bool wxDirExists(const wxString& dir)
 455 {
 456 #ifdef __WXMICROWIN__
 457     return wxPathExist(dir);
 458 #elif defined(__WIN32__)
 459     DWORD attribs = GetFileAttributes(dir);
 460     return ((attribs != (DWORD)-1) && (attribs & FILE_ATTRIBUTE_DIRECTORY));
 461 #endif // Win32/__WXMICROWIN__
 462 }
 463
 464 bool wxGetDiskSpace(const wxString& path, wxLongLong *pTotal, wxLongLong *pFree)
 465 {
 466 #ifdef __WXWINCE__
 467     return false;
 468 #else
 469     if ( path.empty() )
 470         return false;
 471
 472 // old w32api don't have ULARGE_INTEGER
 473 #if defined(__WIN32__) && \
 474     (!defined(__GNUWIN32__) || wxCHECK_W32API_VERSION( 0, 3 ))
 475     // GetDiskFreeSpaceEx() is not available under original Win95, check for
 476     // it
 477     typedef BOOL (WINAPI *GetDiskFreeSpaceEx_t)(LPCTSTR,
 478                                                 PULARGE_INTEGER,
 479                                                 PULARGE_INTEGER,
 480                                                 PULARGE_INTEGER);
 481
 482     GetDiskFreeSpaceEx_t
 483         pGetDiskFreeSpaceEx = (GetDiskFreeSpaceEx_t)::GetProcAddress
 484                               (
 485                                 ::GetModuleHandle(_T("kernel32.dll")),
 486 #if wxUSE_UNICODE
 487                                 "GetDiskFreeSpaceExW"
 488 #else
 489                                 "GetDiskFreeSpaceExA"
 490 #endif
 491                               );
 492
 493     if ( pGetDiskFreeSpaceEx )
 494     {
 495         ULARGE_INTEGER bytesFree, bytesTotal;
 496
 497         // may pass the path as is, GetDiskFreeSpaceEx() is smart enough
 498         if ( !pGetDiskFreeSpaceEx(path,
 499                                   &bytesFree,
 500                                   &bytesTotal,
 501                                   NULL) )
 502         {
 503             wxLogLastError(_T("GetDiskFreeSpaceEx"));
 504
 505             return false;
 506         }
 507
 508         // ULARGE_INTEGER is a union of a 64 bit value and a struct containing
 509         // two 32 bit fields which may be or may be not named - try to make it
 510         // compile in all cases
 511 #if defined(__BORLANDC__) && !defined(_ANONYMOUS_STRUCT)
 512         #define UL(ul) ul.u
 513 #else // anon union
 514         #define UL(ul) ul
 515 #endif
 516         if ( pTotal )
 517         {
 518             *pTotal = wxLongLong(UL(bytesTotal).HighPart, UL(bytesTotal).LowPart);
 519         }
 520
 521         if ( pFree )
 522         {
 523             *pFree = wxLongLong(UL(bytesFree).HighPart, UL(bytesFree).LowPart);
 524         }
 525     }
 526     else
 527 #endif // Win32
 528     {
 529         // there's a problem with drives larger than 2GB, GetDiskFreeSpaceEx()
 530         // should be used instead - but if it's not available, fall back on
 531         // GetDiskFreeSpace() nevertheless...
 532
 533         DWORD lSectorsPerCluster,
 534               lBytesPerSector,
 535               lNumberOfFreeClusters,
 536               lTotalNumberOfClusters;
 537
 538         // FIXME: this is wrong, we should extract the root drive from path
 539         //        instead, but this is the job for wxFileName...
 540         if ( !::GetDiskFreeSpace(path,
 541                                  &lSectorsPerCluster,
 542                                  &lBytesPerSector,
 543                                  &lNumberOfFreeClusters,
 544                                  &lTotalNumberOfClusters) )
 545         {
 546             wxLogLastError(_T("GetDiskFreeSpace"));
 547
 548             return false;
 549         }
 550
 551         wxLongLong lBytesPerCluster = lSectorsPerCluster;
 552         lBytesPerCluster *= lBytesPerSector;
 553
 554         if ( pTotal )
 555         {
 556             *pTotal = lBytesPerCluster;
 557             *pTotal *= lTotalNumberOfClusters;
 558         }
 559
 560         if ( pFree )
 561         {
 562             *pFree = lBytesPerCluster;
 563             *pFree *= lNumberOfFreeClusters;
 564         }
 565     }
 566
 567     return true;
 568 #endif
 569     // __WXWINCE__
 570 }
 571
 572 // ----------------------------------------------------------------------------
 573 // env vars
 574 // ----------------------------------------------------------------------------
 575
 576 bool wxGetEnv(const wxString& var, wxString *value)
 577 {
 578 #ifdef __WXWINCE__
 579     return false;
 580 #else // Win32
 581     // first get the size of the buffer
 582     DWORD dwRet = ::GetEnvironmentVariable(var, NULL, 0);
 583     if ( !dwRet )
 584     {
 585         // this means that there is no such variable
 586         return false;
 587     }
 588
 589     if ( value )
 590     {
 591         (void)::GetEnvironmentVariable(var, wxStringBuffer(*value, dwRet),
 592                                        dwRet);
 593     }
 594
 595     return true;
 596 #endif // WinCE/32
 597 }
 598
 599 bool wxSetEnv(const wxString& var, const wxChar *value)
 600 {
 601     // some compilers have putenv() or _putenv() or _wputenv() but it's better
 602     // to always use Win32 function directly instead of dealing with them
 603 #if defined(__WIN32__) && !defined(__WXWINCE__)
 604     if ( !::SetEnvironmentVariable(var, value) )
 605     {
 606         wxLogLastError(_T("SetEnvironmentVariable"));
 607
 608         return false;
 609     }
 610
 611     return true;
 612 #else // no way to set env vars
 613     return false;
 614 #endif
 615 }
 616
 617 // ----------------------------------------------------------------------------
 618 // process management
 619 // ----------------------------------------------------------------------------
 620
 621 // structure used to pass parameters from wxKill() to wxEnumFindByPidProc()
 622 struct wxFindByPidParams
 623 {
 624     wxFindByPidParams() { hwnd = 0; pid = 0; }
 625
 626     // the HWND used to return the result
 627     HWND hwnd;
 628
 629     // the PID we're looking from
 630     DWORD pid;
 631
 632     DECLARE_NO_COPY_CLASS(wxFindByPidParams)
 633 };
 634
 635 // wxKill helper: EnumWindows() callback which is used to find the first (top
 636 // level) window belonging to the given process
 637 BOOL CALLBACK wxEnumFindByPidProc(HWND hwnd, LPARAM lParam)
 638 {
 639     DWORD pid;
 640     (void)::GetWindowThreadProcessId(hwnd, &pid);
 641
 642     wxFindByPidParams *params = (wxFindByPidParams *)lParam;
 643     if ( pid == params->pid )
 644     {
 645         // remember the window we found
 646         params->hwnd = hwnd;
 647
 648         // return FALSE to stop the enumeration
 649         return FALSE;
 650     }
 651
 652     // continue enumeration
 653     return TRUE;
 654 }
 655
 656 int wxKillAllChildren(long pid, wxSignal sig, wxKillError *krc);
 657
 658 int wxKill(long pid, wxSignal sig, wxKillError *krc, int flags)
 659 {
 660     if (flags & wxKILL_CHILDREN)
 661         wxKillAllChildren(pid, sig, krc);
 662
 663     // get the process handle to operate on
 664     HANDLE hProcess = ::OpenProcess(SYNCHRONIZE |
 665                                     PROCESS_TERMINATE |
 666                                     PROCESS_QUERY_INFORMATION,
 667                                     FALSE, // not inheritable
 668                                     (DWORD)pid);
 669     if ( hProcess == NULL )
 670     {
 671         if ( krc )
 672         {
 673             if ( ::GetLastError() == ERROR_ACCESS_DENIED )
 674             {
 675                 *krc = wxKILL_ACCESS_DENIED;
 676             }
 677             else
 678             {
 679                 *krc = wxKILL_NO_PROCESS;
 680             }
 681         }
 682
 683         return -1;
 684     }
 685
 686     bool ok = true;
 687     switch ( sig )
 688     {
 689         case wxSIGKILL:
 690             // kill the process forcefully returning -1 as error code
 691             if ( !::TerminateProcess(hProcess, (UINT)-1) )
 692             {
 693                 wxLogSysError(_("Failed to kill process %d"), pid);
 694
 695                 if ( krc )
 696                 {
 697                     // this is not supposed to happen if we could open the
 698                     // process
 699                     *krc = wxKILL_ERROR;
 700                 }
 701
 702                 ok = false;
 703             }
 704             break;
 705
 706         case wxSIGNONE:
 707             // do nothing, we just want to test for process existence
 708             break;
 709
 710         default:
 711             // any other signal means "terminate"
 712             {
 713                 wxFindByPidParams params;
 714                 params.pid = (DWORD)pid;
 715
 716                 // EnumWindows() has nice semantics: it returns 0 if it found
 717                 // something or if an error occured and non zero if it
 718                 // enumerated all the window
 719                 if ( !::EnumWindows(wxEnumFindByPidProc, (LPARAM)&params) )
 720                 {
 721                     // did we find any window?
 722                     if ( params.hwnd )
 723                     {
 724                         // tell the app to close
 725                         //
 726                         // NB: this is the harshest way, the app won't have
 727                         //     opportunity to save any files, for example, but
 728                         //     this is probably what we want here. If not we
 729                         //     can also use SendMesageTimeout(WM_CLOSE)
 730                         if ( !::PostMessage(params.hwnd, WM_QUIT, 0, 0) )
 731                         {
 732                             wxLogLastError(_T("PostMessage(WM_QUIT)"));
 733                         }
 734                     }
 735                     else // it was an error then
 736                     {
 737                         wxLogLastError(_T("EnumWindows"));
 738
 739                         ok = false;
 740                     }
 741                 }
 742                 else // no windows for this PID
 743                 {
 744                     if ( krc )
 745                     {
 746                         *krc = wxKILL_ERROR;
 747                     }
 748
 749                     ok = false;
 750                 }
 751             }
 752     }
 753
 754     // the return code
 755     DWORD rc;
 756
 757     if ( ok )
 758     {
 759         // as we wait for a short time, we can use just WaitForSingleObject()
 760         // and not MsgWaitForMultipleObjects()
 761         switch ( ::WaitForSingleObject(hProcess, 500 /* msec */) )
 762         {
 763             case WAIT_OBJECT_0:
 764                 // process terminated
 765                 if ( !::GetExitCodeProcess(hProcess, &rc) )
 766                 {
 767                     wxLogLastError(_T("GetExitCodeProcess"));
 768                 }
 769                 break;
 770
 771             default:
 772                 wxFAIL_MSG( _T("unexpected WaitForSingleObject() return") );
 773                 // fall through
 774
 775             case WAIT_FAILED:
 776                 wxLogLastError(_T("WaitForSingleObject"));
 777                 // fall through
 778
 779             case WAIT_TIMEOUT:
 780                 if ( krc )
 781                 {
 782                     *krc = wxKILL_ERROR;
 783                 }
 784
 785                 rc = STILL_ACTIVE;
 786                 break;
 787         }
 788     }
 789     else // !ok
 790     {
 791         // just to suppress the warnings about uninitialized variable
 792         rc = 0;
 793     }
 794
 795     ::CloseHandle(hProcess);
 796
 797     // the return code is the same as from Unix kill(): 0 if killed
 798     // successfully or -1 on error
 799     //
 800     // be careful to interpret rc correctly: for wxSIGNONE we return success if
 801     // the process exists, for all the other sig values -- if it doesn't
 802     if ( ok &&
 803             ((sig == wxSIGNONE) == (rc == STILL_ACTIVE)) )
 804     {
 805         if ( krc )
 806         {
 807             *krc = wxKILL_OK;
 808         }
 809
 810         return 0;
 811     }
 812
 813     // error
 814     return -1;
 815 }
 816
 817 HANDLE (WINAPI *lpfCreateToolhelp32Snapshot)(DWORD,DWORD) ;
 818 BOOL (WINAPI *lpfProcess32First)(HANDLE,LPPROCESSENTRY32) ;
 819 BOOL (WINAPI *lpfProcess32Next)(HANDLE,LPPROCESSENTRY32) ;
 820
 821 static void InitToolHelp32()
 822 {
 823     static bool s_initToolHelpDone = false;
 824
 825     if (s_initToolHelpDone)
 826         return;
 827
 828     s_initToolHelpDone = true;
 829
 830     lpfCreateToolhelp32Snapshot = NULL;
 831     lpfProcess32First = NULL;
 832     lpfProcess32Next = NULL;
 833
 834     HINSTANCE hInstLib = LoadLibrary( wxT("Kernel32.DLL") ) ;
 835     if( hInstLib == NULL )
 836         return ;
 837
 838     // Get procedure addresses.
 839     // We are linking to these functions of Kernel32
 840     // explicitly, because otherwise a module using
 841     // this code would fail to load under Windows NT,
 842     // which does not have the Toolhelp32
 843     // functions in the Kernel 32.
 844     lpfCreateToolhelp32Snapshot=
 845         (HANDLE(WINAPI *)(DWORD,DWORD))
 846         GetProcAddress( hInstLib,
 847 #ifdef __WXWINCE__
 848         wxT("CreateToolhelp32Snapshot")
 849 #else
 850         "CreateToolhelp32Snapshot"
 851 #endif
 852         ) ;
 853
 854     lpfProcess32First=
 855         (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
 856         GetProcAddress( hInstLib,
 857 #ifdef __WXWINCE__
 858         wxT("Process32First")
 859 #else
 860         "Process32First"
 861 #endif
 862         ) ;
 863
 864     lpfProcess32Next=
 865         (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
 866         GetProcAddress( hInstLib,
 867 #ifdef __WXWINCE__
 868         wxT("Process32Next")
 869 #else
 870         "Process32Next"
 871 #endif
 872         ) ;
 873
 874     FreeLibrary( hInstLib ) ;
 875 }
 876
 877 // By John Skiff
 878 int wxKillAllChildren(long pid, wxSignal sig, wxKillError *krc)
 879 {
 880     InitToolHelp32();
 881
 882     if (krc)
 883         *krc = wxKILL_OK;
 884
 885     // If not implemented for this platform (e.g. NT 4.0), silently ignore
 886     if (!lpfCreateToolhelp32Snapshot || !lpfProcess32First || !lpfProcess32Next)
 887         return 0;
 888
 889     // Take a snapshot of all processes in the system.
 890     HANDLE hProcessSnap = lpfCreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
 891     if (hProcessSnap == INVALID_HANDLE_VALUE) {
 892         if (krc)
 893             *krc = wxKILL_ERROR;
 894         return -1;
 895     }
 896
 897     //Fill in the size of the structure before using it.
 898     PROCESSENTRY32 pe = {0};
 899     pe.dwSize = sizeof(PROCESSENTRY32);
 900
 901     // Walk the snapshot of the processes, and for each process,
 902     // kill it if its parent is pid.
 903     if (!lpfProcess32First(hProcessSnap, &pe)) {
 904         // Can't get first process.
 905         if (krc)
 906             *krc = wxKILL_ERROR;
 907         CloseHandle (hProcessSnap);
 908         return -1;
 909     }
 910
 911     do {
 912         if (pe.th32ParentProcessID == (DWORD) pid) {
 913             if (wxKill(pe.th32ProcessID, sig, krc))
 914                 return -1;
 915         }
 916     } while (lpfProcess32Next (hProcessSnap, &pe));
 917
 918
 919     return 0;
 920 }
 921
 922 // Execute a program in an Interactive Shell
 923 bool wxShell(const wxString& command)
 924 {
 925     wxString cmd;
 926
 927 #ifdef __WXWINCE__
 928     cmd = command;
 929 #else
 930     wxChar *shell = wxGetenv(wxT("COMSPEC"));
 931     if ( !shell )
 932         shell = (wxChar*) wxT("\\COMMAND.COM");
 933
 934     if ( !command )
 935     {
 936         // just the shell
 937         cmd = shell;
 938     }
 939     else
 940     {
 941         // pass the command to execute to the command processor
 942         cmd.Printf(wxT("%s /c %s"), shell, command.c_str());
 943     }
 944 #endif
 945
 946     return wxExecute(cmd, wxEXEC_SYNC) == 0;
 947 }
 948
 949 // Shutdown or reboot the PC
 950 bool wxShutdown(wxShutdownFlags wFlags)
 951 {
 952 #ifdef __WXWINCE__
 953     return false;
 954 #elif defined(__WIN32__)
 955     bool bOK = true;
 956
 957     if ( wxGetOsVersion(NULL, NULL) == wxWINDOWS_NT ) // if is NT or 2K
 958     {
 959         // Get a token for this process.
 960         HANDLE hToken;
 961         bOK = ::OpenProcessToken(GetCurrentProcess(),
 962                                  TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
 963                                  &hToken) != 0;
 964         if ( bOK )
 965         {
 966             TOKEN_PRIVILEGES tkp;
 967
 968             // Get the LUID for the shutdown privilege.
 969             ::LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
 970                                    &tkp.Privileges[0].Luid);
 971
 972             tkp.PrivilegeCount = 1;  // one privilege to set
 973             tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
 974
 975             // Get the shutdown privilege for this process.
 976             ::AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
 977                                     (PTOKEN_PRIVILEGES)NULL, 0);
 978
 979             // Cannot test the return value of AdjustTokenPrivileges.
 980             bOK = ::GetLastError() == ERROR_SUCCESS;
 981         }
 982     }
 983
 984     if ( bOK )
 985     {
 986         UINT flags = EWX_SHUTDOWN | EWX_FORCE;
 987         switch ( wFlags )
 988         {
 989             case wxSHUTDOWN_POWEROFF:
 990                 flags |= EWX_POWEROFF;
 991                 break;
 992
 993             case wxSHUTDOWN_REBOOT:
 994                 flags |= EWX_REBOOT;
 995                 break;
 996
 997             default:
 998                 wxFAIL_MSG( _T("unknown wxShutdown() flag") );
 999                 return false;
1000         }
1001
1002         bOK = ::ExitWindowsEx(flags, 0) != 0;
1003     }
1004
1005     return bOK;
1006 #endif // Win32/16
1007 }
1008
1009 // ----------------------------------------------------------------------------
1010 // misc
1011 // ----------------------------------------------------------------------------
1012
1013 // Get free memory in bytes, or -1 if cannot determine amount (e.g. on UNIX)
1014 wxMemorySize wxGetFreeMemory()
1015 {
1016 #if defined(__WIN64__)
1017     MEMORYSTATUSEX memStatex;
1018     statex.dwLength = sizeof (statex);
1019     ::GlobalMemoryStatusEx (&statex);
1020     return (wxMemorySize)memStatus.ullAvailPhys;
1021 #else /* if defined(__WIN32__) */
1022     MEMORYSTATUS memStatus;
1023     memStatus.dwLength = sizeof(MEMORYSTATUS);
1024     ::GlobalMemoryStatus(&memStatus);
1025     return (wxMemorySize)memStatus.dwAvailPhys;
1026 #endif
1027 }
1028
1029 unsigned long wxGetProcessId()
1030 {
1031     return ::GetCurrentProcessId();
1032 }
1033
1034 // Emit a beeeeeep
1035 void wxBell()
1036 {
1037     ::MessageBeep((UINT)-1);        // default sound
1038 }
1039
1040 bool wxIsDebuggerRunning()
1041 {
1042     // IsDebuggerPresent() is not available under Win95, so load it dynamically
1043     wxDynamicLibrary dll(_T("kernel32.dll"), wxDL_VERBATIM);
1044
1045     typedef BOOL (WINAPI *IsDebuggerPresent_t)();
1046     if ( !dll.HasSymbol(_T("IsDebuggerPresent")) )
1047     {
1048         // no way to know, assume no
1049         return false;
1050     }
1051
1052     return (*(IsDebuggerPresent_t)dll.GetSymbol(_T("IsDebuggerPresent")))() != 0;
1053 }
1054
1055 // ----------------------------------------------------------------------------
1056 // OS version
1057 // ----------------------------------------------------------------------------
1058
1059 wxString wxGetOsDescription()
1060 {
1061     wxString str;
1062
1063     OSVERSIONINFO info;
1064     wxZeroMemory(info);
1065
1066     info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
1067     if ( ::GetVersionEx(&info) )
1068     {
1069         switch ( info.dwPlatformId )
1070         {
1071             case VER_PLATFORM_WIN32s:
1072                 str = _("Win32s on Windows 3.1");
1073                 break;
1074
1075             case VER_PLATFORM_WIN32_WINDOWS:
1076                 switch (info.dwMinorVersion)
1077                 {
1078                     case 0:
1079                         if ( info.szCSDVersion[1] == 'B' ||
1080                              info.szCSDVersion[1] == 'C' )
1081                         {
1082                             str = _("Windows 95 OSR2");
1083                         }
1084                         else
1085                         {
1086                             str = _("Windows 95");
1087                         }
1088                         break;
1089                     case 10:
1090                         if ( info.szCSDVersion[1] == 'B' ||
1091                              info.szCSDVersion[1] == 'C' )
1092                         {
1093                             str = _("Windows 98 SE");
1094                         }
1095                         else
1096                         {
1097                             str = _("Windows 98");
1098                         }
1099                         break;
1100                     case 90:
1101                         str = _("Windows ME");
1102                         break;
1103                     default:
1104                         str.Printf(_("Windows 9x (%d.%d)"),
1105                                    info.dwMajorVersion,
1106                                    info.dwMinorVersion);
1107                         break;
1108                 }
1109                 if ( !wxIsEmpty(info.szCSDVersion) )
1110                 {
1111                     str << _T(" (") << info.szCSDVersion << _T(')');
1112                 }
1113                 break;
1114
1115             case VER_PLATFORM_WIN32_NT:
1116                 if ( info.dwMajorVersion == 5 )
1117                 {
1118                     switch ( info.dwMinorVersion )
1119                     {
1120                         case 0:
1121                             str.Printf(_("Windows 2000 (build %lu"),
1122                                        info.dwBuildNumber);
1123                             break;
1124                         case 1:
1125                             str.Printf(_("Windows XP (build %lu"),
1126                                        info.dwBuildNumber);
1127                             break;
1128                         case 2:
1129                             str.Printf(_("Windows Server 2003 (build %lu"),
1130                                        info.dwBuildNumber);
1131                             break;
1132                     }
1133                 }
1134                 if ( wxIsEmpty(str) )
1135                 {
1136                     str.Printf(_("Windows NT %lu.%lu (build %lu"),
1137                            info.dwMajorVersion,
1138                            info.dwMinorVersion,
1139                            info.dwBuildNumber);
1140                 }
1141                 if ( !wxIsEmpty(info.szCSDVersion) )
1142                 {
1143                     str << _T(", ") << info.szCSDVersion;
1144                 }
1145                 str << _T(')');
1146                 break;
1147         }
1148     }
1149     else
1150     {
1151         wxFAIL_MSG( _T("GetVersionEx() failed") ); // should never happen
1152     }
1153
1154     return str;
1155 }
1156
1157 wxToolkitInfo& wxAppTraits::GetToolkitInfo()
1158 {
1159     // cache the version info, it's not going to change
1160     //
1161     // NB: this is MT-safe, we may use these static vars from different threads
1162     //     but as they always have the same value it doesn't matter
1163     static int s_ver = -1,
1164                s_major = -1,
1165                s_minor = -1;
1166
1167     if ( s_ver == -1 )
1168     {
1169         OSVERSIONINFO info;
1170         wxZeroMemory(info);
1171
1172         s_ver = wxWINDOWS;
1173         info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
1174         if ( ::GetVersionEx(&info) )
1175         {
1176             s_major = info.dwMajorVersion;
1177             s_minor = info.dwMinorVersion;
1178
1179             switch ( info.dwPlatformId )
1180             {
1181                 case VER_PLATFORM_WIN32s:
1182                     s_ver = wxWIN32S;
1183                     break;
1184
1185                 case VER_PLATFORM_WIN32_WINDOWS:
1186                     s_ver = wxWIN95;
1187                     break;
1188
1189                 case VER_PLATFORM_WIN32_NT:
1190                     s_ver = wxWINDOWS_NT;
1191                     break;
1192 #ifdef __WXWINCE__
1193                 case VER_PLATFORM_WIN32_CE:
1194                     s_ver = wxWINDOWS_CE;
1195                     break;
1196 #endif
1197             }
1198         }
1199     }
1200
1201     static wxToolkitInfo info;
1202     info.versionMajor = s_major;
1203     info.versionMinor = s_minor;
1204     info.os = s_ver;
1205     info.name = _T("wxBase");
1206     return info;
1207 }
1208
1209 // ----------------------------------------------------------------------------
1210 // sleep functions
1211 // ----------------------------------------------------------------------------
1212
1213 void wxMilliSleep(unsigned long milliseconds)
1214 {
1215     ::Sleep(milliseconds);
1216 }
1217
1218 void wxMicroSleep(unsigned long microseconds)
1219 {
1220     wxMilliSleep(microseconds/1000);
1221 }
1222
1223 void wxSleep(int nSecs)
1224 {
1225     wxMilliSleep(1000*nSecs);
1226 }
1227
1228 // ----------------------------------------------------------------------------
1229 // font encoding <-> Win32 codepage conversion functions
1230 // ----------------------------------------------------------------------------
1231
1232 extern WXDLLIMPEXP_BASE long wxEncodingToCharset(wxFontEncoding encoding)
1233 {
1234     switch ( encoding )
1235     {
1236         // although this function is supposed to return an exact match, do do
1237         // some mappings here for the most common case of "standard" encoding
1238         case wxFONTENCODING_SYSTEM:
1239             return DEFAULT_CHARSET;
1240
1241         case wxFONTENCODING_ISO8859_1:
1242         case wxFONTENCODING_ISO8859_15:
1243         case wxFONTENCODING_CP1252:
1244             return ANSI_CHARSET;
1245
1246 #if !defined(__WXMICROWIN__)
1247         // The following four fonts are multi-byte charsets
1248         case wxFONTENCODING_CP932:
1249             return SHIFTJIS_CHARSET;
1250
1251         case wxFONTENCODING_CP936:
1252             return GB2312_CHARSET;
1253
1254         case wxFONTENCODING_CP949:
1255             return HANGUL_CHARSET;
1256
1257         case wxFONTENCODING_CP950:
1258             return CHINESEBIG5_CHARSET;
1259
1260         // The rest are single byte encodings
1261         case wxFONTENCODING_CP1250:
1262             return EASTEUROPE_CHARSET;
1263
1264         case wxFONTENCODING_CP1251:
1265             return RUSSIAN_CHARSET;
1266
1267         case wxFONTENCODING_CP1253:
1268             return GREEK_CHARSET;
1269
1270         case wxFONTENCODING_CP1254:
1271             return TURKISH_CHARSET;
1272
1273         case wxFONTENCODING_CP1255:
1274             return HEBREW_CHARSET;
1275
1276         case wxFONTENCODING_CP1256:
1277             return ARABIC_CHARSET;
1278
1279         case wxFONTENCODING_CP1257:
1280             return BALTIC_CHARSET;
1281
1282         case wxFONTENCODING_CP874:
1283             return THAI_CHARSET;
1284 #endif // !__WXMICROWIN__
1285
1286         case wxFONTENCODING_CP437:
1287             return OEM_CHARSET;
1288
1289         default:
1290             // no way to translate this encoding into a Windows charset
1291             return -1;
1292     }
1293 }
1294
1295 // we have 2 versions of wxCharsetToCodepage(): the old one which directly
1296 // looks up the vlaues in the registry and the new one which is more
1297 // politically correct and has more chances to work on other Windows versions
1298 // as well but the old version is still needed for !wxUSE_FONTMAP case
1299 #if wxUSE_FONTMAP
1300
1301 #include "wx/fontmap.h"
1302
1303 extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
1304 {
1305     // There don't seem to be symbolic names for
1306     // these under Windows so I just copied the
1307     // values from MSDN.
1308
1309     unsigned int ret;
1310
1311     switch (encoding)
1312     {
1313         case wxFONTENCODING_ISO8859_1:      ret = 28591; break;
1314         case wxFONTENCODING_ISO8859_2:      ret = 28592; break;
1315         case wxFONTENCODING_ISO8859_3:      ret = 28593; break;
1316         case wxFONTENCODING_ISO8859_4:      ret = 28594; break;
1317         case wxFONTENCODING_ISO8859_5:      ret = 28595; break;
1318         case wxFONTENCODING_ISO8859_6:      ret = 28596; break;
1319         case wxFONTENCODING_ISO8859_7:      ret = 28597; break;
1320         case wxFONTENCODING_ISO8859_8:      ret = 28598; break;
1321         case wxFONTENCODING_ISO8859_9:      ret = 28599; break;
1322         case wxFONTENCODING_ISO8859_10:     ret = 28600; break;
1323         case wxFONTENCODING_ISO8859_11:     ret = 28601; break;
1324         // case wxFONTENCODING_ISO8859_12,      // doesn't exist currently, but put it
1325         case wxFONTENCODING_ISO8859_13:     ret = 28603; break;
1326         case wxFONTENCODING_ISO8859_14:     ret = 28604; break;
1327         case wxFONTENCODING_ISO8859_15:     ret = 28605; break;
1328         case wxFONTENCODING_KOI8:           ret = 20866; break;
1329         case wxFONTENCODING_KOI8_U:         ret = 21866; break;
1330         case wxFONTENCODING_CP437:          ret = 437; break;
1331         case wxFONTENCODING_CP850:          ret = 850; break;
1332         case wxFONTENCODING_CP852:          ret = 852; break;
1333         case wxFONTENCODING_CP855:          ret = 855; break;
1334         case wxFONTENCODING_CP866:          ret = 866; break;
1335         case wxFONTENCODING_CP874:          ret = 874; break;
1336         case wxFONTENCODING_CP932:          ret = 932; break;
1337         case wxFONTENCODING_CP936:          ret = 936; break;
1338         case wxFONTENCODING_CP949:          ret = 949; break;
1339         case wxFONTENCODING_CP950:          ret = 950; break;
1340         case wxFONTENCODING_CP1250:         ret = 1250; break;
1341         case wxFONTENCODING_CP1251:         ret = 1251; break;
1342         case wxFONTENCODING_CP1252:         ret = 1252; break;
1343         case wxFONTENCODING_CP1253:         ret = 1253; break;
1344         case wxFONTENCODING_CP1254:         ret = 1254; break;
1345         case wxFONTENCODING_CP1255:         ret = 1255; break;
1346         case wxFONTENCODING_CP1256:         ret = 1256; break;
1347         case wxFONTENCODING_CP1257:         ret = 1257; break;
1348         case wxFONTENCODING_EUC_JP:         ret = 51932; break;
1349         case wxFONTENCODING_MACROMAN:       ret = 10000; break;
1350         case wxFONTENCODING_MACJAPANESE:    ret = 10001; break;
1351         case wxFONTENCODING_MACCHINESETRAD: ret = 10002; break;
1352         case wxFONTENCODING_MACKOREAN:      ret = 10003; break;
1353         case wxFONTENCODING_MACARABIC:      ret = 10004; break;
1354         case wxFONTENCODING_MACHEBREW:      ret = 10005; break;
1355         case wxFONTENCODING_MACGREEK:       ret = 10006; break;
1356         case wxFONTENCODING_MACCYRILLIC:    ret = 10007; break;
1357         case wxFONTENCODING_MACTHAI:        ret = 10021; break;
1358         case wxFONTENCODING_MACCHINESESIMP: ret = 10008; break;
1359         case wxFONTENCODING_MACCENTRALEUR:  ret = 10029; break;
1360         case wxFONTENCODING_MACCROATIAN:    ret = 10082; break;
1361         case wxFONTENCODING_MACICELANDIC:   ret = 10079; break;
1362         case wxFONTENCODING_MACROMANIAN:    ret = 10009; break;
1363         case wxFONTENCODING_UTF7:           ret = 65000; break;
1364         case wxFONTENCODING_UTF8:           ret = 65001; break;
1365         default:                            return -1;
1366     }
1367
1368     if (::IsValidCodePage(ret) == 0)
1369         return -1;
1370
1371     CPINFO info;
1372     if (::GetCPInfo(ret, &info) == 0)
1373         return -1;
1374
1375     return (long) ret;
1376 }
1377
1378 extern long wxCharsetToCodepage(const wxChar *name)
1379 {
1380     // first get the font encoding for this charset
1381     if ( !name )
1382         return -1;
1383
1384     wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(name, false);
1385     if ( enc == wxFONTENCODING_SYSTEM )
1386         return -1;
1387
1388     // the use the helper function
1389     return wxEncodingToCodepage(enc);
1390 }
1391
1392 #else // !wxUSE_FONTMAP
1393
1394 #include "wx/msw/registry.h"
1395
1396 // this should work if Internet Exploiter is installed
1397 extern long wxCharsetToCodepage(const wxChar *name)
1398 {
1399     if (!name)
1400         return GetACP();
1401
1402     long CP = -1;
1403
1404     wxString path(wxT("MIME\\Database\\Charset\\"));
1405     wxString cn(name);
1406
1407     // follow the alias loop
1408     for ( ;; )
1409     {
1410         wxRegKey key(wxRegKey::HKCR, path + cn);
1411
1412         if (!key.Exists())
1413             break;
1414
1415         // two cases: either there's an AliasForCharset string,
1416         // or there are Codepage and InternetEncoding dwords.
1417         // The InternetEncoding gives us the actual encoding,
1418         // the Codepage just says which Windows character set to
1419         // use when displaying the data.
1420         if (key.HasValue(wxT("InternetEncoding")) &&
1421             key.QueryValue(wxT("InternetEncoding"), &CP))
1422             break;
1423
1424         // no encoding, see if it's an alias
1425         if (!key.HasValue(wxT("AliasForCharset")) ||
1426             !key.QueryValue(wxT("AliasForCharset"), cn))
1427             break;
1428     }
1429
1430     return CP;
1431 }
1432
1433 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
1434
1435 /*
1436   Creates a hidden window with supplied window proc registering the class for
1437   it if necesssary (i.e. the first time only). Caller is responsible for
1438   destroying the window and unregistering the class (note that this must be
1439   done because wxWidgets may be used as a DLL and so may be loaded/unloaded
1440   multiple times into/from the same process so we cna't rely on automatic
1441   Windows class unregistration).
1442
1443   pclassname is a pointer to a caller stored classname, which must initially be
1444   NULL. classname is the desired wndclass classname. If function succesfully
1445   registers the class, pclassname will be set to classname.
1446  */
1447 extern "C" WXDLLIMPEXP_BASE HWND
1448 wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc)
1449 {
1450     wxCHECK_MSG( classname && pclassname && wndproc, NULL,
1451                     _T("NULL parameter in wxCreateHiddenWindow") );
1452
1453     // register the class fi we need to first
1454     if ( *pclassname == NULL )
1455     {
1456         WNDCLASS wndclass;
1457         wxZeroMemory(wndclass);
1458
1459         wndclass.lpfnWndProc   = wndproc;
1460         wndclass.hInstance     = wxGetInstance();
1461         wndclass.lpszClassName = classname;
1462
1463         if ( !::RegisterClass(&wndclass) )
1464         {
1465             wxLogLastError(wxT("RegisterClass() in wxCreateHiddenWindow"));
1466
1467             return NULL;
1468         }
1469
1470         *pclassname = classname;
1471     }
1472
1473     // next create the window
1474     HWND hwnd = ::CreateWindow
1475                   (
1476                     *pclassname,
1477                     NULL,
1478                     0, 0, 0, 0,
1479                     0,
1480                     (HWND) NULL,
1481                     (HMENU)NULL,
1482                     wxGetInstance(),
1483                     (LPVOID) NULL
1484                   );
1485
1486     if ( !hwnd )
1487     {
1488         wxLogLastError(wxT("CreateWindow() in wxCreateHiddenWindow"));
1489     }
1490
1491     return hwnd;
1492 }
1493