src/common/dynlib.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/dynlib.cpp
   3 // Purpose:     Dynamic library management
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     20/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Guilhem Lavaux
   9 //                  2000-2005 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 //FIXME:  This class isn't really common at all, it should be moved into
  14 //        platform dependent files (already done for Windows and Unix)
  15
  16 // ============================================================================
  17 // declarations
  18 // ============================================================================
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 #include  "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #if wxUSE_DYNLIB_CLASS
  31
  32 #include "wx/dynlib.h"
  33
  34 #ifndef WX_PRECOMP
  35     #include "wx/intl.h"
  36     #include "wx/log.h"
  37     #include "wx/app.h"
  38     #include "wx/utils.h"
  39 #endif //WX_PRECOMP
  40
  41 #include "wx/filefn.h"
  42 #include "wx/filename.h"        // for SplitPath()
  43 #include "wx/platinfo.h"
  44
  45 #include "wx/arrimpl.cpp"
  46
  47 #if defined(__WXMAC__)
  48     #include "wx/mac/private.h"
  49 #endif
  50
  51 WX_DEFINE_USER_EXPORTED_OBJARRAY(wxDynamicLibraryDetailsArray)
  52
  53 // ============================================================================
  54 // implementation
  55 // ============================================================================
  56
  57 // ---------------------------------------------------------------------------
  58 // wxDynamicLibrary
  59 // ---------------------------------------------------------------------------
  60
  61 #if defined(__WXPM__) || defined(__EMX__)
  62     const wxString wxDynamicLibrary::ms_dllext(_T(".dll"));
  63 #endif
  64
  65 // for MSW/Unix it is defined in platform-specific file
  66 #if !(defined(__WXMSW__) || defined(__UNIX__)) || defined(__EMX__)
  67
  68 wxDllType wxDynamicLibrary::GetProgramHandle()
  69 {
  70    wxFAIL_MSG( wxT("GetProgramHandle() is not implemented under this platform"));
  71    return 0;
  72 }
  73
  74 #endif // __WXMSW__ || __UNIX__
  75
  76
  77 bool wxDynamicLibrary::Load(const wxString& libnameOrig, int flags)
  78 {
  79     wxASSERT_MSG(m_handle == 0, _T("Library already loaded."));
  80
  81     // add the proper extension for the DLL ourselves unless told not to
  82     wxString libname = libnameOrig;
  83     if ( !(flags & wxDL_VERBATIM) )
  84     {
  85         // and also check that the libname doesn't already have it
  86         wxString ext;
  87         wxFileName::SplitPath(libname, NULL, NULL, &ext);
  88         if ( ext.empty() )
  89         {
  90             libname += GetDllExt();
  91         }
  92     }
  93
  94     // different ways to load a shared library
  95     //
  96     // FIXME: should go to the platform-specific files!
  97 #if defined(__WXPM__) || defined(__EMX__)
  98     char err[256] = "";
  99     DosLoadModule(err, sizeof(err), libname.c_str(), &m_handle);
 100 #else // this should be the only remaining branch eventually
 101     m_handle = RawLoad(libname, flags);
 102 #endif
 103
 104     if ( m_handle == 0 )
 105     {
 106 #ifdef wxHAVE_DYNLIB_ERROR
 107         Error();
 108 #else
 109         wxLogSysError(_("Failed to load shared library '%s'"), libname.c_str());
 110 #endif
 111     }
 112
 113     return IsLoaded();
 114 }
 115
 116 // for MSW and Unix this is implemented in the platform-specific file
 117 //
 118 // TODO: move the rest to os2/dlpm.cpp and mac/dlmac.cpp!
 119 #if (!defined(__WXMSW__) && !defined(__UNIX__)) || defined(__EMX__)
 120
 121 /* static */
 122 void wxDynamicLibrary::Unload(wxDllType handle)
 123 {
 124 #if defined(__OS2__) || defined(__EMX__)
 125     DosFreeModule( handle );
 126 #else
 127     #error  "runtime shared lib support not implemented"
 128 #endif
 129 }
 130
 131 #endif // !(__WXMSW__ || __UNIX__)
 132
 133 void *wxDynamicLibrary::DoGetSymbol(const wxString &name, bool *success) const
 134 {
 135     wxCHECK_MSG( IsLoaded(), NULL,
 136                  _T("Can't load symbol from unloaded library") );
 137
 138     void    *symbol = 0;
 139
 140     wxUnusedVar(symbol);
 141 #if defined(__WXPM__) || defined(__EMX__)
 142     DosQueryProcAddr( m_handle, 1L, name.c_str(), (PFN*)symbol );
 143 #else
 144     symbol = RawGetSymbol(m_handle, name);
 145 #endif
 146
 147     if ( success )
 148         *success = symbol != NULL;
 149
 150     return symbol;
 151 }
 152
 153 void *wxDynamicLibrary::GetSymbol(const wxString& name, bool *success) const
 154 {
 155     void *symbol = DoGetSymbol(name, success);
 156     if ( !symbol )
 157     {
 158 #ifdef wxHAVE_DYNLIB_ERROR
 159         Error();
 160 #else
 161         wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
 162                       name.c_str());
 163 #endif
 164     }
 165
 166     return symbol;
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // informational methods
 171 // ----------------------------------------------------------------------------
 172
 173 /*static*/
 174 wxString
 175 wxDynamicLibrary::CanonicalizeName(const wxString& name,
 176                                    wxDynamicLibraryCategory cat)
 177 {
 178     wxString nameCanonic;
 179
 180     // under Unix the library names usually start with "lib" prefix, add it
 181 #if defined(__UNIX__) && !defined(__EMX__)
 182     switch ( cat )
 183     {
 184         default:
 185             wxFAIL_MSG( _T("unknown wxDynamicLibraryCategory value") );
 186             // fall through
 187
 188         case wxDL_MODULE:
 189             // don't do anything for modules, their names are arbitrary
 190             break;
 191
 192         case wxDL_LIBRARY:
 193             // library names should start with "lib" under Unix
 194             nameCanonic = _T("lib");
 195             break;
 196     }
 197 #else // !__UNIX__
 198     wxUnusedVar(cat);
 199 #endif // __UNIX__/!__UNIX__
 200
 201     nameCanonic << name << GetDllExt();
 202     return nameCanonic;
 203 }
 204
 205 /*static*/
 206 wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
 207                                                   wxPluginCategory cat)
 208 {
 209     wxString suffix;
 210     if ( cat == wxDL_PLUGIN_GUI )
 211     {
 212         suffix = wxPlatformInfo::Get().GetPortIdShortName();
 213     }
 214 #if wxUSE_UNICODE
 215     suffix << _T('u');
 216 #endif
 217 #ifdef __WXDEBUG__
 218     suffix << _T('d');
 219 #endif
 220
 221     if ( !suffix.empty() )
 222         suffix = wxString(_T("_")) + suffix;
 223
 224 #define WXSTRINGIZE(x)  #x
 225 #if defined(__UNIX__) && !defined(__EMX__)
 226     #if (wxMINOR_VERSION % 2) == 0
 227         #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y)
 228     #else
 229         #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y) "." WXSTRINGIZE(z)
 230     #endif
 231 #else
 232     #if (wxMINOR_VERSION % 2) == 0
 233         #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y)
 234     #else
 235         #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y) WXSTRINGIZE(z)
 236     #endif
 237 #endif
 238
 239     suffix << wxString::FromAscii(wxDLLVER(wxMAJOR_VERSION, wxMINOR_VERSION,
 240                                            wxRELEASE_NUMBER));
 241 #undef wxDLLVER
 242 #undef WXSTRINGIZE
 243
 244 #ifdef __WINDOWS__
 245     // Add compiler identification:
 246     #if defined(__GNUG__)
 247         suffix << _T("_gcc");
 248     #elif defined(__VISUALC__)
 249         suffix << _T("_vc");
 250     #elif defined(__WATCOMC__)
 251         suffix << _T("_wat");
 252     #elif defined(__BORLANDC__)
 253         suffix << _T("_bcc");
 254     #endif
 255 #endif
 256
 257     return CanonicalizeName(name + suffix, wxDL_MODULE);
 258 }
 259
 260 /*static*/
 261 wxString wxDynamicLibrary::GetPluginsDirectory()
 262 {
 263 #ifdef __UNIX__
 264     wxString format = wxGetInstallPrefix();
 265     wxString dir;
 266     format << wxFILE_SEP_PATH
 267            << wxT("lib") << wxFILE_SEP_PATH
 268            << wxT("wx") << wxFILE_SEP_PATH
 269 #if (wxMINOR_VERSION % 2) == 0
 270            << wxT("%i.%i");
 271     dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
 272 #else
 273            << wxT("%i.%i.%i");
 274     dir.Printf(format.c_str(),
 275                wxMAJOR_VERSION, wxMINOR_VERSION, wxRELEASE_NUMBER);
 276 #endif
 277     return dir;
 278
 279 #else // ! __UNIX__
 280     return wxEmptyString;
 281 #endif
 282 }
 283
 284
 285 #endif // wxUSE_DYNLIB_CLASS