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[wxWidgets.git] / src / common / dynlib.cpp
diff --git a/src/common/dynlib.cpp b/src/common/dynlib.cpp
index 7e2f336baf90cc912c04552dcd6ea74eb978b132..69d5bc700ed9df3426c6015d8d6dc00b0c07f4f1 100644 (file)
--- a/src/common/dynlib.cpp
+++ b/src/common/dynlib.cpp
@@ -1,244 +1,281 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////
-// Name:        dynlib.cpp
+// Name:        src/common/dynlib.cpp
 // Purpose:     Dynamic library management
 // Author:      Guilhem Lavaux
 // Modified by:
 // Created:     20/07/98
 // RCS-ID:      $Id$
 // Purpose:     Dynamic library management
 // Author:      Guilhem Lavaux
 // Modified by:
 // Created:     20/07/98
 // RCS-ID:      $Id$
-// Copyright:   (c) Guilhem Lavaux
-// Licence:     wxWindows license
+// Copyright:   (c) 1998 Guilhem Lavaux
+//                  2000-2005 Vadim Zeitlin
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "dynlib.h"
-#endif
+//FIXME:  This class isn't really common at all, it should be moved into
+//        platform dependent files (already done for Windows and Unix)
 
 
-#include <wx/dynlib.h>
-#include <wx/filefn.h>
-#include <wx/list.h>
-#include <wx/string.h>
+// ============================================================================
+// declarations
+// ============================================================================
 
 
-// ---------------------------------------------------------------------------
-// System dependent include
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
 
 
-#ifdef __UNIX__ 
-#include <dlfcn.h>
-#endif
+#include  "wx/wxprec.h"
 
 
-#ifdef __WINDOWS__
-#include <windows.h>
+#ifdef __BORLANDC__
+    #pragma hdrstop
 #endif
 
 #endif
 
-// ---------------------------------------------------------------------------
-// Global variables
-// ---------------------------------------------------------------------------
+#if wxUSE_DYNLIB_CLASS
 
 
-wxLibraries wxTheLibraries;
+#include "wx/dynlib.h"
 
 
-// ---------------------------------------------------------------------------
-// wxLibrary (one instance per dynamic library
-// ---------------------------------------------------------------------------
+#ifndef WX_PRECOMP
+    #include "wx/intl.h"
+    #include "wx/log.h"
+    #include "wx/app.h"
+    #include "wx/utils.h"
+#endif //WX_PRECOMP
 
 
-wxLibrary::wxLibrary(void *handle)
-{
-  typedef wxClassLibrary *(*t_get_list)(void);
-  t_get_list get_list;
+#include "wx/filefn.h"
+#include "wx/filename.h"        // for SplitPath()
+#include "wx/platinfo.h"
 
 
-  m_handle = handle;
+#include "wx/arrimpl.cpp"
 
 
-  get_list = (t_get_list)GetSymbol("GetClassList");
-  m_liblist = (*get_list)();
-}
+WX_DEFINE_USER_EXPORTED_OBJARRAY(wxDynamicLibraryDetailsArray)
 
 
-wxLibrary::~wxLibrary()
-{
-  if (m_handle) {
-    typedef void (*t_free_list)(wxClassLibrary *);
-    t_free_list free_list;
+// ============================================================================
+// implementation
+// ============================================================================
 
 
-    free_list = (t_free_list) GetSymbol("FreeClassList");
-    if (free_list != NULL)
-      free_list(m_liblist);
-    else
-      delete m_liblist;
+// ---------------------------------------------------------------------------
+// wxDynamicLibrary
+// ---------------------------------------------------------------------------
 
 
-#ifdef __UNIX__
-    dlclose(m_handle);
-#endif
-#ifdef __WINDOWS__
-    FreeLibrary((HMODULE)m_handle);
+#if defined(__WXPM__) || defined(__EMX__)
+    const wxString wxDynamicLibrary::ms_dllext(_T(".dll"));
 #endif
 #endif
-  }
-}
 
 
-wxObject *wxLibrary::CreateObject(const wxString& name)
-{
-  return m_liblist->CreateObject(name);
-}
+// for MSW/Unix it is defined in platform-specific file
+#if !(defined(__WXMSW__) || defined(__UNIX__)) || defined(__EMX__)
 
 
-void *wxLibrary::GetSymbol(const wxString& symbname)
+wxDllType wxDynamicLibrary::GetProgramHandle()
 {
 {
-#ifdef __UNIX__
-  return dlsym(m_handle, WXSTRINGCAST symbname);
-#endif
-#ifdef __WINDOWS__
-  return GetProcAddress(m_handle, WXSTRINGCAST symbname);
-#endif
-  return NULL;
+   wxFAIL_MSG( wxT("GetProgramHandle() is not implemented under this platform"));
+   return 0;
 }
 
 }
 
-// ---------------------------------------------------------------------------
-// wxLibraries (only one instance should normally exist)
-// ---------------------------------------------------------------------------
+#endif // __WXMSW__ || __UNIX__
 
 
-wxLibraries::wxLibraries()
-{
-}
 
 
-wxLibraries::~wxLibraries()
+bool wxDynamicLibrary::Load(const wxString& libnameOrig, int flags)
 {
 {
-  wxNode *node = m_loaded.First();
+    wxASSERT_MSG(m_handle == 0, _T("Library already loaded."));
+
+    // add the proper extension for the DLL ourselves unless told not to
+    wxString libname = libnameOrig;
+    if ( !(flags & wxDL_VERBATIM) )
+    {
+        // and also check that the libname doesn't already have it
+        wxString ext;
+        wxFileName::SplitPath(libname, NULL, NULL, &ext);
+        if ( ext.empty() )
+        {
+            libname += GetDllExt();
+        }
+    }
+
+    // different ways to load a shared library
+    //
+    // FIXME: should go to the platform-specific files!
+#if defined(__WXPM__) || defined(__EMX__)
+    char err[256] = "";
+    DosLoadModule(err, sizeof(err), libname.c_str(), &m_handle);
+#else // this should be the only remaining branch eventually
+    m_handle = RawLoad(libname, flags);
+#endif
 
 
-  while (node) {
-    wxLibrary *lib = (wxLibrary *)node->Data();
-    delete lib;
+    if ( m_handle == 0 && !(flags & wxDL_QUIET) )
+    {
+#ifdef wxHAVE_DYNLIB_ERROR
+        Error();
+#else
+        wxLogSysError(_("Failed to load shared library '%s'"), libname.c_str());
+#endif
+    }
 
 
-    node = node->Next();
-  }
+    return IsLoaded();
 }
 
 }
 
-wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
-{
-  wxString lib_name = name;
-  wxNode *node;
-  wxLibrary *lib;
+// for MSW and Unix this is implemented in the platform-specific file
+//
+// TODO: move the rest to os2/dlpm.cpp and mac/dlmac.cpp!
+#if (!defined(__WXMSW__) && !defined(__UNIX__)) || defined(__EMX__)
 
 
-  if ( (node = m_loaded.Find(name.GetData())) )
-    return ((wxLibrary *)node->Data());
+/* static */
+void wxDynamicLibrary::Unload(wxDllType handle)
+{
+#if defined(__OS2__) || defined(__EMX__)
+    DosFreeModule( handle );
+#else
+    #error  "runtime shared lib support not implemented"
+#endif
+}
 
 
-#ifdef __UNIX__
-  lib_name.Prepend("lib");
-  lib_name += ".so";
+#endif // !(__WXMSW__ || __UNIX__)
 
 
-  printf("lib_name = %s\n", WXSTRINGCAST lib_name);
+void *wxDynamicLibrary::DoGetSymbol(const wxString &name, bool *success) const
+{
+    wxCHECK_MSG( IsLoaded(), NULL,
+                 _T("Can't load symbol from unloaded library") );
 
 
-  void *handle = dlopen(WXSTRINGCAST lib_name, RTLD_LAZY);
+    void    *symbol = 0;
 
 
-  if (!handle)
-    return NULL;
+    wxUnusedVar(symbol);
+#if defined(__WXPM__) || defined(__EMX__)
+    DosQueryProcAddr( m_handle, 1L, name.c_str(), (PFN*)symbol );
+#else
+    symbol = RawGetSymbol(m_handle, name);
 #endif
 #endif
-#ifdef __WINDOWS__
-  lib_name += ".dll";
 
 
-  HMODULE handle = LoadLibrary(lib_name);
-  if (!handle)
-    return NULL;
-#endif
-  lib = new wxLibrary((void *)handle);
+    if ( success )
+        *success = symbol != NULL;
 
 
-  m_loaded.Append(name.GetData(), lib);
-  return lib;
+    return symbol;
 }
 
 }
 
-wxObject *wxLibraries::CreateObject(const wxString& path)
+void *wxDynamicLibrary::GetSymbol(const wxString& name, bool *success) const
 {
 {
-  wxNode *node = m_loaded.First();
-  wxObject *obj;
-
-  while (node) {
-    obj = ((wxLibrary *)node->Data())->CreateObject(path);
-    if (obj) 
-      return obj;
+    void *symbol = DoGetSymbol(name, success);
+    if ( !symbol )
+    {
+#ifdef wxHAVE_DYNLIB_ERROR
+        Error();
+#else
+        wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
+                      name.c_str());
+#endif
+    }
 
 
-    node = node->Next();
-  }
-  return NULL;
+    return symbol;
 }
 
 }
 
-// ---------------------------------------------------------------------------
-// wxClassLibrary (this class is used to access the internal class)
-// ---------------------------------------------------------------------------
-
-wxClassLibrary::wxClassLibrary(void)
-{
-}
+// ----------------------------------------------------------------------------
+// informational methods
+// ----------------------------------------------------------------------------
 
 
-wxClassLibrary::~wxClassLibrary(void)
+/*static*/
+wxString
+wxDynamicLibrary::CanonicalizeName(const wxString& name,
+                                   wxDynamicLibraryCategory cat)
 {
 {
-  uint i;
+    wxString nameCanonic;
+
+    // under Unix the library names usually start with "lib" prefix, add it
+#if defined(__UNIX__) && !defined(__EMX__)
+    switch ( cat )
+    {
+        default:
+            wxFAIL_MSG( _T("unknown wxDynamicLibraryCategory value") );
+            // fall through
+
+        case wxDL_MODULE:
+            // don't do anything for modules, their names are arbitrary
+            break;
+
+        case wxDL_LIBRARY:
+            // library names should start with "lib" under Unix
+            nameCanonic = _T("lib");
+            break;
+    }
+#else // !__UNIX__
+    wxUnusedVar(cat);
+#endif // __UNIX__/!__UNIX__
 
 
-  for (i=0;i<m_list.Count();i++)
-    delete (m_list[i]);
+    nameCanonic << name << GetDllExt();
+    return nameCanonic;
 }
 
 }
 
-void wxClassLibrary::RegisterClass(wxClassInfo *class_info,
-                                   const wxString& path)
+/*static*/
+wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
+                                                  wxPluginCategory cat)
 {
 {
-  wxClassLibInfo *info = new wxClassLibInfo;
+    wxString suffix;
+    if ( cat == wxDL_PLUGIN_GUI )
+    {
+        suffix = wxPlatformInfo::Get().GetPortIdShortName();
+    }
+#if wxUSE_UNICODE
+    suffix << _T('u');
+#endif
+#ifdef __WXDEBUG__
+    suffix << _T('d');
+#endif
 
 
-  info->class_info = class_info;
-  info->path = path;
-  m_list.Add(info);
-}
+    if ( !suffix.empty() )
+        suffix = wxString(_T("_")) + suffix;
+
+#define WXSTRINGIZE(x)  #x
+#if defined(__UNIX__) && !defined(__EMX__)
+    #if (wxMINOR_VERSION % 2) == 0
+        #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y)
+    #else
+        #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y) "." WXSTRINGIZE(z)
+    #endif
+#else
+    #if (wxMINOR_VERSION % 2) == 0
+        #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y)
+    #else
+        #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y) WXSTRINGIZE(z)
+    #endif
+#endif
 
 
-void wxClassLibrary::UnregisterClass(wxClassInfo *class_info)
-{
-  uint i = 0;
+    suffix << wxString::FromAscii(wxDLLVER(wxMAJOR_VERSION, wxMINOR_VERSION,
+                                           wxRELEASE_NUMBER));
+#undef wxDLLVER
+#undef WXSTRINGIZE
 
 
-  while (i < m_list.Count()) {
-    if (m_list[i]->class_info == class_info) {
-      delete (m_list[i]);
-      m_list.Remove(i);
-      return;
-    }
-    i++;
-  }
-}
+#ifdef __WINDOWS__
+    // Add compiler identification:
+    #if defined(__GNUG__)
+        suffix << _T("_gcc");
+    #elif defined(__VISUALC__)
+        suffix << _T("_vc");
+    #elif defined(__WATCOMC__)
+        suffix << _T("_wat");
+    #elif defined(__BORLANDC__)
+        suffix << _T("_bcc");
+    #endif
+#endif
 
 
-bool wxClassLibrary::CreateObjects(const wxString& path,
-                                   wxArrayClassInfo& objs)
-{
-  wxClassLibInfo *info;
-  uint i = 0;
-
-  while (i < m_list.Count()) {
-    info = m_list[i];
-    if (wxMatchWild(path, info->path))
-      objs.Add(info->class_info);
-    i++;
-  }
-  return (i > 0);
+    return CanonicalizeName(name + suffix, wxDL_MODULE);
 }
 
 }
 
-bool wxClassLibrary::FetchInfos(const wxString& path,
-                                wxArrayClassLibInfo& infos)
+/*static*/
+wxString wxDynamicLibrary::GetPluginsDirectory()
 {
 {
-  wxClassLibInfo *info;
-  uint i = 0;
-
-  while (i < m_list.Count()) {
-    info = m_list[i];
-    if (wxMatchWild(path, info->path)) {
-      wxClassLibInfo *inf = new wxClassLibInfo;
-      *inf = *info;
-      infos.Add(inf);
-    }
-    i++;
-  }
-  return (i > 0);
-}
+#ifdef __UNIX__
+    wxString format = wxGetInstallPrefix();
+    wxString dir;
+    format << wxFILE_SEP_PATH
+           << wxT("lib") << wxFILE_SEP_PATH
+           << wxT("wx") << wxFILE_SEP_PATH
+#if (wxMINOR_VERSION % 2) == 0
+           << wxT("%i.%i");
+    dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
+#else
+           << wxT("%i.%i.%i");
+    dir.Printf(format.c_str(),
+               wxMAJOR_VERSION, wxMINOR_VERSION, wxRELEASE_NUMBER);
+#endif
+    return dir;
 
 
-wxObject *wxClassLibrary::CreateObject(const wxString& path)
-{
-  wxClassLibInfo *info;
-  uint i = 0;
-
-  while (i < m_list.Count()) {
-    info = m_list[i];
-    if (wxMatchWild(path, info->path))
-      return info->class_info->CreateObject();
-    i++;
-  }
-  return NULL;
+#else // ! __UNIX__
+    return wxEmptyString;
+#endif
 }
 }
+
+
+#endif // wxUSE_DYNLIB_CLASS
wxWidgets (Impactor)