]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/utils.cpp
merge msw/gsocket.cpp into msw/sockmsw.cpp
[wxWidgets.git] / src / msw / utils.cpp
index ece5167e97be1ed3e12f78d81957200135238da6..328839265aec279761462467f174546c0e2b17b1 100644 (file)
@@ -29,7 +29,6 @@
     #include "wx/app.h"
     #include "wx/intl.h"
     #include "wx/log.h"
-    #include "wx/timer.h"
 #endif  //WX_PRECOMP
 
 #include "wx/msw/registry.h"
@@ -41,7 +40,7 @@
 #include "wx/confbase.h"        // for wxExpandEnvVars()
 
 #include "wx/msw/private.h"     // includes <windows.h>
-#include "wx/msw/missing.h"     // CHARSET_HANGUL
+#include "wx/msw/missing.h"     // for CHARSET_HANGUL
 
 #if defined(__CYGWIN__)
     //CYGWIN gives annoying warning about runtime stuff if we don't do this
@@ -56,7 +55,7 @@
     #include <winsock.h>
 #endif
 
-#if !defined(__GNUWIN32__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
+#if !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
     #include <direct.h>
 
     #ifndef __MWERKS__
@@ -133,7 +132,7 @@ bool wxGetHostName(wxChar *WXUNUSED_IN_WINCE(buf),
 #if defined(__WXWINCE__)
     // TODO-CE
     return false;
-#elif defined(__WIN32__) && !defined(__WXMICROWIN__)
+#else
     DWORD nSize = maxSize;
     if ( !::GetComputerName(buf, &nSize) )
     {
@@ -143,23 +142,13 @@ bool wxGetHostName(wxChar *WXUNUSED_IN_WINCE(buf),
     }
 
     return true;
-#else
-    wxChar *sysname;
-    const wxChar *default_host = wxT("noname");
-
-    if ((sysname = wxGetenv(wxT("SYSTEM_NAME"))) == NULL) {
-        GetProfileString(WX_SECTION, eHOSTNAME, default_host, buf, maxSize - 1);
-    } else
-        wxStrncpy(buf, sysname, maxSize - 1);
-    buf[maxSize] = wxT('\0');
-    return *buf ? true : false;
 #endif
 }
 
 // get full hostname (with domain name if possible)
 bool wxGetFullHostName(wxChar *buf, int maxSize)
 {
-#if !defined( __WXMICROWIN__) && wxUSE_DYNAMIC_LOADER && wxUSE_SOCKETS
+#if !defined( __WXMICROWIN__) && wxUSE_DYNLIB_CLASS && wxUSE_SOCKETS
     // TODO should use GetComputerNameEx() when available
 
     // we don't want to always link with Winsock DLL as we might not use it at
@@ -229,7 +218,7 @@ bool wxGetFullHostName(wxChar *buf, int maxSize)
 
             if ( !host.empty() )
             {
-                wxStrncpy(buf, host, maxSize);
+                wxStrlcpy(buf, host.c_str(), maxSize);
 
                 return true;
             }
@@ -247,7 +236,7 @@ bool wxGetUserId(wxChar *WXUNUSED_IN_WINCE(buf),
 #if defined(__WXWINCE__)
     // TODO-CE
     return false;
-#elif defined(__WIN32__) && !defined(__WXMICROWIN__)
+#else
     DWORD nSize = maxSize;
     if ( ::GetUserName(buf, &nSize) == 0 )
     {
@@ -261,24 +250,6 @@ bool wxGetUserId(wxChar *WXUNUSED_IN_WINCE(buf),
     }
 
     return true;
-#else   // __WXMICROWIN__
-    wxChar *user;
-    const wxChar *default_id = wxT("anonymous");
-
-    // Can't assume we have NIS (PC-NFS) or some other ID daemon
-    // So we ...
-    if ( (user = wxGetenv(wxT("USER"))) == NULL &&
-         (user = wxGetenv(wxT("LOGNAME"))) == NULL )
-    {
-        // Use wxWidgets configuration data (comming soon)
-        GetProfileString(WX_SECTION, eUSERID, default_id, buf, maxSize - 1);
-    }
-    else
-    {
-        wxStrncpy(buf, user, maxSize - 1);
-    }
-
-    return *buf ? true : false;
 #endif
 }
 
@@ -287,7 +258,7 @@ bool wxGetUserName(wxChar *buf, int maxSize)
 {
     wxCHECK_MSG( buf && ( maxSize > 0 ), false,
                     _T("empty buffer in wxGetUserName") );
-#if defined(__WXWINCE__)
+#if defined(__WXWINCE__) && wxUSE_REGKEY
     wxLogNull noLog;
     wxRegKey key(wxRegKey::HKCU, wxT("ControlPanel\\Owner"));
     if(!key.Open(wxRegKey::Read))
@@ -295,8 +266,7 @@ bool wxGetUserName(wxChar *buf, int maxSize)
     wxString name;
     if(!key.QueryValue(wxT("Owner"),name))
         return false;
-    wxStrncpy(buf, name.c_str(), maxSize-1);
-    buf[maxSize-1] = _T('\0');
+    wxStrlcpy(buf, name.c_str(), maxSize);
     return true;
 #elif defined(USE_NET_API)
     CHAR szUserName[256];
@@ -375,7 +345,7 @@ error:
 
     if ( !ok )
     {
-        wxStrncpy(buf, wxT("Unknown User"), maxSize);
+        wxStrlcpy(buf, wxT("Unknown User"), maxSize);
     }
 
     return true;
@@ -387,7 +357,7 @@ const wxChar* wxGetHomeDir(wxString *pstr)
     wxString& strDir = *pstr;
 
     // first branch is for Cygwin
-#if defined(__UNIX__)
+#if defined(__UNIX__) && !defined(__WINE__)
     const wxChar *szHome = wxGetenv("HOME");
     if ( szHome == NULL ) {
       // we're homeless...
@@ -468,14 +438,14 @@ const wxChar* wxGetHomeDir(wxString *pstr)
     return strDir.c_str();
 }
 
-wxChar *wxGetUserHome(const wxString& WXUNUSED(user))
+wxString wxGetUserHome(const wxString& user)
 {
-    // VZ: the old code here never worked for user != "" anyhow! Moreover, it
-    //     returned sometimes a malloc()'d pointer, sometimes a pointer to a
-    //     static buffer and sometimes I don't even know what.
-    static wxString s_home;
+    wxString home;
 
-    return (wxChar *)wxGetHomeDir(&s_home);
+    if ( user.empty() || user == wxGetUserId() )
+        wxGetHomeDir(&home);
+
+    return home;
 }
 
 bool wxGetDiskSpace(const wxString& WXUNUSED_IN_WINCE(path),
@@ -515,7 +485,7 @@ bool wxGetDiskSpace(const wxString& WXUNUSED_IN_WINCE(path),
         ULARGE_INTEGER bytesFree, bytesTotal;
 
         // may pass the path as is, GetDiskFreeSpaceEx() is smart enough
-        if ( !pGetDiskFreeSpaceEx(path,
+        if ( !pGetDiskFreeSpaceEx(path.fn_str(),
                                   &bytesFree,
                                   &bytesTotal,
                                   NULL) )
@@ -565,7 +535,7 @@ bool wxGetDiskSpace(const wxString& WXUNUSED_IN_WINCE(path),
 
         // FIXME: this is wrong, we should extract the root drive from path
         //        instead, but this is the job for wxFileName...
-        if ( !::GetDiskFreeSpace(path,
+        if ( !::GetDiskFreeSpace(path.fn_str(),
                                  &lSectorsPerCluster,
                                  &lBytesPerSector,
                                  &lNumberOfFreeClusters,
@@ -609,7 +579,7 @@ bool wxGetEnv(const wxString& WXUNUSED_IN_WINCE(var),
     return false;
 #else // Win32
     // first get the size of the buffer
-    DWORD dwRet = ::GetEnvironmentVariable(var, NULL, 0);
+    DWORD dwRet = ::GetEnvironmentVariable(var.t_str(), NULL, 0);
     if ( !dwRet )
     {
         // this means that there is no such variable
@@ -618,7 +588,8 @@ bool wxGetEnv(const wxString& WXUNUSED_IN_WINCE(var),
 
     if ( value )
     {
-        (void)::GetEnvironmentVariable(var, wxStringBuffer(*value, dwRet),
+        (void)::GetEnvironmentVariable(var.t_str(),
+                                       wxStringBuffer(*value, dwRet),
                                        dwRet);
     }
 
@@ -626,8 +597,8 @@ bool wxGetEnv(const wxString& WXUNUSED_IN_WINCE(var),
 #endif // WinCE/32
 }
 
-bool wxSetEnv(const wxString& WXUNUSED_IN_WINCE(var),
-              const wxChar *WXUNUSED_IN_WINCE(value))
+bool wxDoSetEnv(const wxString& WXUNUSED_IN_WINCE(var),
+                const wxChar *WXUNUSED_IN_WINCE(value))
 {
     // some compilers have putenv() or _putenv() or _wputenv() but it's better
     // to always use Win32 function directly instead of dealing with them
@@ -635,7 +606,7 @@ bool wxSetEnv(const wxString& WXUNUSED_IN_WINCE(var),
     // no environment variables under CE
     return false;
 #else
-    if ( !::SetEnvironmentVariable(var, value) )
+    if ( !::SetEnvironmentVariable(var.t_str(), value) )
     {
         wxLogLastError(_T("SetEnvironmentVariable"));
 
@@ -646,6 +617,16 @@ bool wxSetEnv(const wxString& WXUNUSED_IN_WINCE(var),
 #endif
 }
 
+bool wxSetEnv(const wxString& variable, const wxString& value)
+{
+    return wxDoSetEnv(variable, value.t_str());
+}
+
+bool wxUnsetEnv(const wxString& variable)
+{
+    return wxDoSetEnv(variable, NULL);
+}
+
 // ----------------------------------------------------------------------------
 // process management
 // ----------------------------------------------------------------------------
@@ -943,7 +924,7 @@ bool wxShell(const wxString& command)
 }
 
 // Shutdown or reboot the PC
-bool wxShutdown(wxShutdownFlags WXUNUSED_IN_WINCE(wFlags))
+bool wxShutdown(int WXUNUSED_IN_WINCE(flags))
 {
 #ifdef __WXWINCE__
     // TODO-CE
@@ -951,7 +932,7 @@ bool wxShutdown(wxShutdownFlags WXUNUSED_IN_WINCE(wFlags))
 #elif defined(__WIN32__)
     bool bOK = true;
 
-    if ( wxGetOsVersion(NULL, NULL) == wxWINDOWS_NT ) // if is NT or 2K
+    if ( wxGetOsVersion(NULL, NULL) == wxOS_WINDOWS_NT ) // if is NT or 2K
     {
         // Get a token for this process.
         HANDLE hToken;
@@ -963,32 +944,47 @@ bool wxShutdown(wxShutdownFlags WXUNUSED_IN_WINCE(wFlags))
             TOKEN_PRIVILEGES tkp;
 
             // Get the LUID for the shutdown privilege.
-            ::LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
-                                   &tkp.Privileges[0].Luid);
+            bOK = ::LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
+                                         &tkp.Privileges[0].Luid) != 0;
+
+            if ( bOK )
+            {
+                tkp.PrivilegeCount = 1;  // one privilege to set
+                tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
 
-            tkp.PrivilegeCount = 1;  // one privilege to set
-            tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+                // Get the shutdown privilege for this process.
+                ::AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
+                                        (PTOKEN_PRIVILEGES)NULL, 0);
 
-            // Get the shutdown privilege for this process.
-            ::AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
-                                    (PTOKEN_PRIVILEGES)NULL, 0);
+                // Cannot test the return value of AdjustTokenPrivileges.
+                bOK = ::GetLastError() == ERROR_SUCCESS;
+            }
 
-            // Cannot test the return value of AdjustTokenPrivileges.
-            bOK = ::GetLastError() == ERROR_SUCCESS;
+            ::CloseHandle(hToken);
         }
     }
 
     if ( bOK )
     {
-        UINT flags = EWX_SHUTDOWN | EWX_FORCE;
-        switch ( wFlags )
+        UINT wFlags = 0;
+        if ( flags & wxSHUTDOWN_FORCE )
+        {
+            wFlags = EWX_FORCE;
+            flags &= ~wxSHUTDOWN_FORCE;
+        }
+
+        switch ( flags )
         {
             case wxSHUTDOWN_POWEROFF:
-                flags |= EWX_POWEROFF;
+                wFlags |= EWX_POWEROFF;
                 break;
 
             case wxSHUTDOWN_REBOOT:
-                flags |= EWX_REBOOT;
+                wFlags |= EWX_REBOOT;
+                break;
+
+            case wxSHUTDOWN_LOGOFF:
+                wFlags |= EWX_LOGOFF;
                 break;
 
             default:
@@ -996,11 +992,11 @@ bool wxShutdown(wxShutdownFlags WXUNUSED_IN_WINCE(wFlags))
                 return false;
         }
 
-        bOK = ::ExitWindowsEx(flags, 0) != 0;
+        bOK = ::ExitWindowsEx(wFlags, 0) != 0;
     }
 
     return bOK;
-#endif // Win32/16
+#endif // WinCE/!WinCE
 }
 
 // ----------------------------------------------------------------------------
@@ -1057,6 +1053,41 @@ bool wxIsDebuggerRunning()
 // OS version
 // ----------------------------------------------------------------------------
 
+// check if we're running under a server or workstation Windows system: it
+// returns true or false with obvious meaning as well as -1 if the system type
+// couldn't be determined
+//
+// this function is currently private but we may want to expose it later if
+// it's really useful
+namespace
+{
+
+int wxIsWindowsServer()
+{
+#ifdef VER_NT_WORKSTATION
+    OSVERSIONINFOEX info;
+    wxZeroMemory(info);
+
+    info.dwOSVersionInfoSize = sizeof(info);
+    if ( ::GetVersionEx(reinterpret_cast<OSVERSIONINFO *>(&info)) )
+    {
+        switch ( info.wProductType )
+        {
+            case VER_NT_WORKSTATION:
+                return false;
+
+            case VER_NT_SERVER:
+            case VER_NT_DOMAIN_CONTROLLER:
+                return true;
+        }
+    }
+#endif // VER_NT_WORKSTATION
+
+    return -1;
+}
+
+} // anonymous namespace
+
 wxString wxGetOsDescription()
 {
     wxString str;
@@ -1121,24 +1152,44 @@ wxString wxGetOsDescription()
                 break;
 
             case VER_PLATFORM_WIN32_NT:
-                if ( info.dwMajorVersion == 5 )
+                switch ( info.dwMajorVersion )
                 {
-                    switch ( info.dwMinorVersion )
-                    {
-                        case 0:
-                            str.Printf(_("Windows 2000 (build %lu"),
-                                       info.dwBuildNumber);
-                            break;
-                        case 1:
-                            str.Printf(_("Windows XP (build %lu"),
-                                       info.dwBuildNumber);
-                            break;
-                        case 2:
-                            str.Printf(_("Windows Server 2003 (build %lu"),
+                    case 5:
+                        switch ( info.dwMinorVersion )
+                        {
+                            case 0:
+                                str.Printf(_("Windows 2000 (build %lu"),
+                                           info.dwBuildNumber);
+                                break;
+
+                            case 2:
+                                // we can't distinguish between XP 64 and 2003
+                                // as they both are 5.2, so examine the product
+                                // type to resolve this ambiguity
+                                if ( wxIsWindowsServer() == 1 )
+                                {
+                                    str.Printf(_("Windows Server 2003 (build %lu"),
+                                               info.dwBuildNumber);
+                                    break;
+                                }
+                                //else: must be XP, fall through
+
+                            case 1:
+                                str.Printf(_("Windows XP (build %lu"),
+                                           info.dwBuildNumber);
+                                break;
+                        }
+                        break;
+
+                    case 6:
+                        if ( info.dwMinorVersion == 0 )
+                        {
+                            str.Printf(_("Windows Vista (build %lu"),
                                        info.dwBuildNumber);
-                            break;
-                    }
+                        }
+                        break;
                 }
+
                 if ( str.empty() )
                 {
                     str.Printf(_("Windows NT %lu.%lu (build %lu"),
@@ -1146,11 +1197,15 @@ wxString wxGetOsDescription()
                            info.dwMinorVersion,
                            info.dwBuildNumber);
                 }
+
                 if ( !wxIsEmpty(info.szCSDVersion) )
                 {
                     str << _T(", ") << info.szCSDVersion;
                 }
                 str << _T(')');
+
+                if ( wxIsPlatform64Bit() )
+                    str << _(", 64-bit edition");
                 break;
         }
     }
@@ -1162,49 +1217,91 @@ wxString wxGetOsDescription()
     return str;
 }
 
-// taken from http://blogs.msdn.com/oldnewthing/archive/2005/02/01/364563.aspx
 bool wxIsPlatform64Bit()
 {
 #if defined(_WIN64)
     return true;  // 64-bit programs run only on Win64
-#elif defined(_WIN32)
-    // 32-bit programs run on both 32-bit and 64-bit Windows
-    // so must sniff
-    BOOL f64 = FALSE;
-    return IsWow64Process(GetCurrentProcess(), &f64) && f64;
+#elif wxUSE_DYNLIB_CLASS // Win32
+    // 32-bit programs run on both 32-bit and 64-bit Windows so check
+    typedef BOOL (WINAPI *IsWow64Process_t)(HANDLE, BOOL *);
+
+    wxDynamicLibrary dllKernel32(_T("kernel32.dll"));
+    IsWow64Process_t pfnIsWow64Process =
+        (IsWow64Process_t)dllKernel32.RawGetSymbol(_T("IsWow64Process"));
+
+    BOOL wow64 = FALSE;
+    if ( pfnIsWow64Process )
+    {
+        pfnIsWow64Process(::GetCurrentProcess(), &wow64);
+    }
+    //else: running under a system without Win64 support
+
+    return wow64 != FALSE;
 #else
-    return false; // Win64 does not support Win16
-#endif
+    return false;
+#endif // Win64/Win32
 }
 
 wxOperatingSystemId wxGetOsVersion(int *verMaj, int *verMin)
 {
-    OSVERSIONINFO info;
-    wxZeroMemory(info);
+    static struct
+    {
+        // this may be false, true or -1 if we tried to initialize but failed
+        int initialized;
 
-    info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
-    if ( ::GetVersionEx(&info) )
+        wxOperatingSystemId os;
+
+        int verMaj,
+            verMin;
+    } s_version;
+
+    // query the OS info only once as it's not supposed to change
+    if ( !s_version.initialized )
     {
-        if (verMaj) *verMaj = info.dwMajorVersion;
-        if (verMin) *verMin = info.dwMinorVersion;
+        OSVERSIONINFO info;
+        wxZeroMemory(info);
+        info.dwOSVersionInfoSize = sizeof(info);
+        if ( ::GetVersionEx(&info) )
+        {
+            s_version.initialized = true;
+
+#if defined(__WXWINCE__)
+            s_version.os = wxOS_WINDOWS_CE;
+#elif defined(__WXMICROWIN__)
+            s_version.os = wxOS_WINDOWS_MICRO;
+#else // "normal" desktop Windows system, use run-time detection
+            switch ( info.dwPlatformId )
+            {
+                case VER_PLATFORM_WIN32_NT:
+                    s_version.os = wxOS_WINDOWS_NT;
+                    break;
+
+                case VER_PLATFORM_WIN32_WINDOWS:
+                    s_version.os = wxOS_WINDOWS_9X;
+                    break;
+            }
+#endif // Windows versions
+
+            s_version.verMaj = info.dwMajorVersion;
+            s_version.verMin = info.dwMinorVersion;
+        }
+        else // GetVersionEx() failed
+        {
+            s_version.initialized = -1;
+        }
     }
 
-#if defined(__WXHANDHELD__) || defined( __WXWINCE__ )
-    return wxOS_WINDOWS_WINCE;
-#elif defined( __WXMICROWIN__ )
-    return wxOS_WINDOWS_MICRO;
-#else
-    switch ( info.dwPlatformId )
+    if ( s_version.initialized == 1 )
     {
-    case VER_PLATFORM_WIN32_NT:
-        return wxOS_WINDOWS_NT;
-
-    case VER_PLATFORM_WIN32_WINDOWS:
-        return wxOS_WINDOWS_9X;
+        if ( verMaj )
+            *verMaj = s_version.verMaj;
+        if ( verMin )
+            *verMin = s_version.verMin;
     }
 
-    return wxOS_UNKNOWN;
-#endif
+    // this works even if we were not initialized successfully as the initial
+    // values of this field is 0 which is wxOS_UNKNOWN and exactly what we need
+    return s_version.os;
 }
 
 wxWinVersion wxGetWinVersion()
@@ -1213,7 +1310,7 @@ wxWinVersion wxGetWinVersion()
         verMin;
     switch ( wxGetOsVersion(&verMaj, &verMin) )
     {
-        case wxWIN95:
+        case wxOS_WINDOWS_9X:
             if ( verMaj == 4 )
             {
                 switch ( verMin )
@@ -1230,7 +1327,7 @@ wxWinVersion wxGetWinVersion()
             }
             break;
 
-        case wxWINDOWS_NT:
+        case wxOS_WINDOWS_NT:
             switch ( verMaj )
             {
                 case 3:
@@ -1258,6 +1355,9 @@ wxWinVersion wxGetWinVersion()
             }
             break;
 
+        default:
+            // Do nothing just to silence GCC warning
+            break;
     }
 
     return wxWinVersion_Unknown;
@@ -1379,13 +1479,15 @@ extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
         case wxFONTENCODING_ISO8859_8:      ret = 28598; break;
         case wxFONTENCODING_ISO8859_9:      ret = 28599; break;
         case wxFONTENCODING_ISO8859_10:     ret = 28600; break;
-        case wxFONTENCODING_ISO8859_11:     ret = 28601; break;
+        case wxFONTENCODING_ISO8859_11:     ret = 874; break;
         // case wxFONTENCODING_ISO8859_12,      // doesn't exist currently, but put it
         case wxFONTENCODING_ISO8859_13:     ret = 28603; break;
-        case wxFONTENCODING_ISO8859_14:     ret = 28604; break;
+        // case wxFONTENCODING_ISO8859_14:     ret = 28604; break; // no correspondence on Windows
         case wxFONTENCODING_ISO8859_15:     ret = 28605; break;
+
         case wxFONTENCODING_KOI8:           ret = 20866; break;
         case wxFONTENCODING_KOI8_U:         ret = 21866; break;
+
         case wxFONTENCODING_CP437:          ret = 437; break;
         case wxFONTENCODING_CP850:          ret = 850; break;
         case wxFONTENCODING_CP852:          ret = 852; break;
@@ -1404,7 +1506,9 @@ extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
         case wxFONTENCODING_CP1255:         ret = 1255; break;
         case wxFONTENCODING_CP1256:         ret = 1256; break;
         case wxFONTENCODING_CP1257:         ret = 1257; break;
+
         case wxFONTENCODING_EUC_JP:         ret = 20932; break;
+
         case wxFONTENCODING_MACROMAN:       ret = 10000; break;
         case wxFONTENCODING_MACJAPANESE:    ret = 10001; break;
         case wxFONTENCODING_MACCHINESETRAD: ret = 10002; break;
@@ -1419,8 +1523,12 @@ extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
         case wxFONTENCODING_MACCROATIAN:    ret = 10082; break;
         case wxFONTENCODING_MACICELANDIC:   ret = 10079; break;
         case wxFONTENCODING_MACROMANIAN:    ret = 10009; break;
+
+        case wxFONTENCODING_ISO2022_JP:     ret = 50222; break;
+
         case wxFONTENCODING_UTF7:           ret = 65000; break;
         case wxFONTENCODING_UTF8:           ret = 65001; break;
+
         default:                            return -1;
     }
 
@@ -1434,7 +1542,7 @@ extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
     return (long) ret;
 }
 
-extern long wxCharsetToCodepage(const wxChar *name)
+extern long wxCharsetToCodepage(const char *name)
 {
     // first get the font encoding for this charset
     if ( !name )
@@ -1453,13 +1561,14 @@ extern long wxCharsetToCodepage(const wxChar *name)
 #include "wx/msw/registry.h"
 
 // this should work if Internet Exploiter is installed
-extern long wxCharsetToCodepage(const wxChar *name)
+extern long wxCharsetToCodepage(const char *name)
 {
     if (!name)
         return GetACP();
 
     long CP = -1;
 
+#if wxUSE_REGKEY
     wxString path(wxT("MIME\\Database\\Charset\\"));
     wxString cn(name);
 
@@ -1485,6 +1594,7 @@ extern long wxCharsetToCodepage(const wxChar *name)
             !key.QueryValue(wxT("AliasForCharset"), cn))
             break;
     }
+#endif // wxUSE_REGKEY
 
     return CP;
 }