corrected DoReadLong

[wxWidgets.git] / src / common / dynlib.cpp

diff --git a/src/common/dynlib.cpp b/src/common/dynlib.cpp
index 447fb80a87e7026eded1bc30861bd8ae218a354f..f105941fdc1b7200c0ac9c5da014f2206c117246 100644 (file)
--- a/src/common/dynlib.cpp
+++ b/src/common/dynlib.cpp
@@ -18,49 +18,100 @@
 // ----------------------------------------------------------------------------
 
 #ifdef __GNUG__
 // ----------------------------------------------------------------------------
 
 #ifdef __GNUG__

-    #pragma implementation "dynlib.h"
+#   pragma implementation "dynlib.h"

 #endif
 
 #include  "wx/wxprec.h"
 
 #endif
 
 #include  "wx/wxprec.h"
 

-#ifdef    __BORLANDC__
+#ifdef __BORLANDC__

   #pragma hdrstop
   #pragma hdrstop

-#endif  //__BORLANDC__
+#endif
+
+#if wxUSE_DYNLIB_CLASS && !wxUSE_DYNAMIC_LOADER

 
 

-#if wxUSE_DYNLIB_CLASS
+#if defined(__WINDOWS__)
+    #include "wx/msw/private.h"
+#endif

 
 #include "wx/dynlib.h"
 #include "wx/filefn.h"
 #include "wx/intl.h"
 #include "wx/log.h"
 
 #include "wx/dynlib.h"
 #include "wx/filefn.h"
 #include "wx/intl.h"
 #include "wx/log.h"

-#include "wx/tokenzr.h"
+
+#if defined(__WXMAC__)
+    #include "wx/mac/private.h"
+#endif

 
 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------
 

-#if defined(HAVE_DLOPEN)
-    #define wxDllOpen(lib)                dlopen(lib, RTLD_LAZY)
-    #define wxDllGetSymbol(handle, name)  dlsym(handle, (char *)name)
-    #define wxDllClose                    dlclose
+#if defined(__WXPM__) || defined(__EMX__)
+#  define INCL_DOS
+#  include <os2.h>
+#  define wxDllOpen(error, lib, handle)     DosLoadModule(error, sizeof(error), lib, &handle)
+#  define wxDllGetSymbol(handle, modaddr)   DosQueryProcAddr(handle, 1L, NULL, (PFN*)modaddr)
+#  define wxDllClose(handle)                DosFreeModule(handle)
+#elif defined(HAVE_DLOPEN)
+    // note about dlopen() flags: we use RTLD_NOW to have more Windows-like
+    // behaviour (Win won't let you load a library with missing symbols) and
+    // RTLD_GLOBAL because it is needed sometimes and probably doesn't hurt
+    // otherwise. On True64-Unix RTLD_GLOBAL is not allowed and on VMS the
+    // second argument on dlopen is ignored.
+#ifdef __VMS
+# define wxDllOpen(lib)                dlopen(lib.fn_str(), 0 )
+#elif defined( __osf__ )
+# define wxDllOpen(lib)                dlopen(lib.fn_str(), RTLD_LAZY )
+#else
+# define wxDllOpen(lib)                dlopen(lib.fn_str(), RTLD_LAZY | RTLD_GLOBAL)
+#endif
+#define wxDllGetSymbol(handle, name)  dlsym(handle, name)
+#   define wxDllClose                    dlclose

 #elif defined(HAVE_SHL_LOAD)
 #elif defined(HAVE_SHL_LOAD)

-    #define wxDllOpen(lib)                shl_load(lib, BIND_DEFERRED, 0)
-    #define wxDllClose      shl_unload
+#   define wxDllOpen(lib)                shl_load(lib.fn_str(), BIND_DEFERRED, 0)
+#   define wxDllClose                    shl_unload

 
 

-    static inline void *wxDllGetSymbol(shl_t handle, const char *name)
-    {
-        void *sym;
-        if ( shl_findsym(&handle, name, TYPE_UNDEFINED, &sym) == 0 )
-            return sym;
-        else
-            return (void *)0;
-    }
+static inline void *wxDllGetSymbol(shl_t handle, const wxString& name)
+{
+    void *sym;
+    if ( shl_findsym(&handle, name.mb_str(), TYPE_UNDEFINED, &sym) == 0 )
+        return sym;
+    else
+        return 0;
+}
+
+#elif defined(__DARWIN__)
+/* Porting notes:
+ *   The dlopen port is a port from dl_next.xs by Anno Siegel.
+ *   dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess.
+ *   The method used here is just to supply the sun style dlopen etc.
+ *   functions in terms of Darwin NS*.
+ */
+void *dlopen(const char *path, int mode /* mode is ignored */);
+void *dlsym(void *handle, const char *symbol);
+int   dlclose(void *handle);
+const char *dlerror(void);
+
+#   define wxDllOpen(lib)                dlopen(lib.fn_str(), 0)
+#   define wxDllGetSymbol(handle, name)  dlsym(handle, name)
+#   define wxDllClose                    dlclose

 #elif defined(__WINDOWS__)
 #elif defined(__WINDOWS__)

-    #define wxDllOpen(lib)                  ::LoadLibrary(lib)
-    #define wxDllGetSymbol(handle, name)    ::GetProcAddress(handle, name)
-    #define wxDllClose                      ::FreeLibrary
+    // using LoadLibraryEx under Win32 to avoid name clash with LoadLibrary
+#   ifdef __WIN32__
+#ifdef _UNICODE
+#      define wxDllOpen(lib)                  ::LoadLibraryExW(lib, 0, 0)
+#else
+#      define wxDllOpen(lib)                  ::LoadLibraryExA(lib, 0, 0)
+#endif
+#   else   // Win16
+#      define wxDllOpen(lib)                  ::LoadLibrary(lib)
+#   endif  // Win32/16
+#   define wxDllGetSymbol(handle, name)    ::GetProcAddress(handle, name)
+#   define wxDllClose                      ::FreeLibrary
+#elif defined(__WXMAC__)
+#   define wxDllClose(handle)               CloseConnection(&((CFragConnectionID)handle))

 #else
 #else

-    #error "Don't know how to load shared libraries on this platform."
+#   error "Don't know how to load shared libraries on this platform."

 #endif // OS
 
 // ---------------------------------------------------------------------------
 #endif // OS
 
 // ---------------------------------------------------------------------------


@@ -69,33 +120,20 @@
 
 wxLibraries wxTheLibraries;
 
 
 wxLibraries wxTheLibraries;
 

-// ----------------------------------------------------------------------------
-// private functions
-// ----------------------------------------------------------------------------
+// ============================================================================
+// implementation
+// ============================================================================

 
 // construct the full name from the base shared object name: adds a .dll
 // suffix under Windows or .so under Unix
 static wxString ConstructLibraryName(const wxString& basename)
 {
 
 // construct the full name from the base shared object name: adds a .dll
 // suffix under Windows or .so under Unix
 static wxString ConstructLibraryName(const wxString& basename)
 {

-    wxString fullname(basename);
-
-#if defined(__UNIX__)
-    #if defined(__HPUX__)
-        fullname << ".sl";
-    #else      //__HPUX__
-        fullname << ".so";
-    #endif     //__HPUX__
-#elif defined(__WINDOWS__)
-    fullname << ".dll";
-#endif
+    wxString fullname;
+    fullname << basename << wxDllLoader::GetDllExt();

 
     return fullname;
 }
 
 
     return fullname;
 }
 

-// ============================================================================
-// implementation
-// ============================================================================
-

 // ---------------------------------------------------------------------------
 // wxLibrary (one instance per dynamic library)
 // ---------------------------------------------------------------------------
 // ---------------------------------------------------------------------------
 // wxLibrary (one instance per dynamic library)
 // ---------------------------------------------------------------------------


@@ -140,7 +178,7 @@ void wxLibrary::PrepareClasses(wxClassInfo *first)
     {
         if (info->m_className)
             classTable.Put(info->m_className, (wxObject *)info);
     {
         if (info->m_className)
             classTable.Put(info->m_className, (wxObject *)info);

-        info = info->GetNext();
+        info = info->m_next;

     }
 
     // Set base pointers for each wxClassInfo
     }
 
     // Set base pointers for each wxClassInfo


@@ -157,32 +195,158 @@ void wxLibrary::PrepareClasses(wxClassInfo *first)
 
 void *wxLibrary::GetSymbol(const wxString& symbname)
 {
 
 void *wxLibrary::GetSymbol(const wxString& symbname)
 {

-    void *symbol = NULL;    // return value
+   return wxDllLoader::GetSymbol(m_handle, symbname);
+}
+
+// ---------------------------------------------------------------------------
+// wxDllLoader
+// ---------------------------------------------------------------------------
+
+
+#if defined(__WINDOWS__) || defined(__WXPM__) || defined(__EMX__)
+const wxString wxDllLoader::ms_dllext( _T(".dll") );
+#elif defined(__UNIX__)
+#if defined(__HPUX__)
+const wxString wxDllLoader::ms_dllext( _T(".sl") );
+#else
+const wxString wxDllLoader::ms_dllext( _T(".so") );
+#endif
+#endif
+
+/* static */
+wxDllType wxDllLoader::GetProgramHandle()
+{
+#if defined( HAVE_DLOPEN ) && !defined(__EMX__)
+   // optain handle for main program
+   return dlopen(NULL, RTLD_NOW/*RTLD_LAZY*/);
+#elif defined (HAVE_SHL_LOAD)
+   // shl_findsymbol with NULL handle looks up in main program
+   return 0;
+#else
+   wxFAIL_MSG( wxT("This method is not implemented under Windows or OS/2"));
+   return 0;
+#endif
+}
+
+/* static */
+wxDllType wxDllLoader::LoadLibrary(const wxString & libname, bool *success)
+{
+    wxDllType   handle;
+    bool        failed = FALSE;
+
+#if defined(__WXMAC__) && !defined(__UNIX__)
+    FSSpec      myFSSpec;
+    Ptr         myMainAddr;
+    Str255      myErrName;
+
+    wxMacFilename2FSSpec( libname , &myFSSpec );
+
+    if( GetDiskFragment( &myFSSpec,
+                         0,
+                         kCFragGoesToEOF,
+                         "\p",
+                         kPrivateCFragCopy,
+                         &((CFragConnectionID)handle),
+                         &myMainAddr,
+                         myErrName ) != noErr )
+    {
+        p2cstr( myErrName );
+        wxLogSysError( _("Failed to load shared library '%s' Error '%s'"),
+                       libname.c_str(),
+                       (char*)myErrName );
+        handle = 0;
+        failed = TRUE;
+    }
+
+#elif defined(__WXPM__) || defined(__EMX__)
+    char        zError[256] = "";
+    wxDllOpen(zError, libname, handle);

 
 

-#if defined( __WXMAC__ )
-    Ptr symAddress ;
-    CFragSymbolClass symClass ;
-    Str255     symName ;
+#else
+    handle = wxDllOpen(libname);

 
 

-    strcpy( (char*) symName , symbname ) ;
-    c2pstr( (char*) symName ) ;
+#endif

 
 

-    if ( FindSymbol( m_handle , symName , &symAddress , &symClass ) == noErr )
+    if ( !handle )

     {
     {

-        symbol = (void *)symAddress ; 
+        wxString msg(_("Failed to load shared library '%s'"));
+
+#ifdef HAVE_DLERROR
+        const wxChar *err = dlerror();
+        if( err )
+        {
+            failed = TRUE;
+            wxLogError( msg, err );
+        }
+#else
+        failed = TRUE;
+        wxLogSysError( msg, libname.c_str() );
+#endif

     }
     }

+
+    if ( success )
+        *success = !failed;
+
+    return handle;
+}
+
+
+/* static */
+void wxDllLoader::UnloadLibrary(wxDllType handle)
+{
+   wxDllClose(handle);
+}
+
+/* static */
+void *wxDllLoader::GetSymbol(wxDllType dllHandle, const wxString &name, bool *success)
+{
+    bool    failed = FALSE;
+    void    *symbol = 0;
+
+#if defined(__WXMAC__) && !defined(__UNIX__)
+    Ptr                 symAddress;
+    CFragSymbolClass    symClass;
+    Str255              symName;
+
+#if TARGET_CARBON
+    c2pstrcpy( (StringPtr) symName, name );
+#else
+    strcpy( (char *) symName, name );
+    c2pstr( (char *) symName );
+#endif
+    if( FindSymbol( ((CFragConnectionID)dllHandle), symName, &symAddress, &symClass ) == noErr )
+        symbol = (void *)symAddress;
+
+#elif defined(__WXPM__) || defined(__EMX__)
+    wxDllGetSymbol(dllHandle, symbol);
+

 #else
 #else

-    // VZ: hmm... why is WXSTRINGCAST needed? if it's really modified, we
-    //     should make a copy of it
-    symbol = wxDllGetSymbol(m_handle, WXSTRINGCAST symbname);
+    // mb_str() is necessary in Unicode build
+    symbol = wxDllGetSymbol(dllHandle, name.mb_str());
+

 #endif
 
     if ( !symbol )
     {
 #endif
 
     if ( !symbol )
     {

+        wxString msg(_("wxDllLoader failed to GetSymbol '%s'"));
+
+#ifdef HAVE_DLERROR
+        const wxChar *err = dlerror();
+        if( err )
+        {
+            failed = TRUE;
+            wxLogError( msg, err );
+        }
+#else
+        failed = TRUE;

         wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
         wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),

-                      symbname.c_str());
+                      name.c_str());
+#endif

     }
 
     }
 

+    if( success )
+        *success = !failed;
+

     return symbol;
 }
 
     return symbol;
 }
 


@@ -190,7 +354,7 @@ void *wxLibrary::GetSymbol(const wxString& symbname)
 // wxLibraries (only one instance should normally exist)
 // ---------------------------------------------------------------------------
 
 // wxLibraries (only one instance should normally exist)
 // ---------------------------------------------------------------------------
 

-wxLibraries::wxLibraries()
+wxLibraries::wxLibraries():m_loaded(wxKEY_STRING)

 {
 }
 
 {
 }
 


@@ -208,92 +372,142 @@ wxLibraries::~wxLibraries()
 
 wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
 {
 
 wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
 {

-    wxNode *node;
-    wxLibrary *lib;
+    wxLibrary   *lib;

     wxClassInfo *old_sm_first;
     wxClassInfo *old_sm_first;

+    wxNode      *node = m_loaded.Find(name.GetData());

 
 

-    if ( (node = m_loaded.Find(name.GetData())) )
+    if (node != NULL)

         return ((wxLibrary *)node->Data());
 
     // If DLL shares data, this is necessary.
     old_sm_first = wxClassInfo::sm_first;
     wxClassInfo::sm_first = NULL;
 
         return ((wxLibrary *)node->Data());
 
     // If DLL shares data, this is necessary.
     old_sm_first = wxClassInfo::sm_first;
     wxClassInfo::sm_first = NULL;
 

-    wxString lib_name = ConstructLibraryName(name);
+    wxString libname = ConstructLibraryName(name);

 
 

-#if defined(__UNIX__)
-    // found the first file in LD_LIBRARY_PATH with this name
-    wxString libPath("/lib:/usr/lib"); // system path first
-    const char *envLibPath = getenv("LD_LIBRARY_PATH");
-    if ( envLibPath )
-        libPath << ':' << envLibPath;
-    wxStringTokenizer tokenizer(libPath, ':');
-    while ( tokenizer.HasMoreToken() )
+    bool success = FALSE;
+    wxDllType handle = wxDllLoader::LoadLibrary(libname, &success);
+    if(success)

     {
     {

-        wxString fullname(tokenizer.NextToken());
+       lib = new wxLibrary(handle);
+       wxClassInfo::sm_first = old_sm_first;

 
 

-        fullname << '/' << lib_name;
-        if ( wxFileExists(fullname) )
-        {
-            lib_name = fullname;
+       m_loaded.Append(name.GetData(), lib);
+    }
+    else
+       lib = NULL;
+    return lib;
+}

 
 

-            // found the library
-            break;
-        }
+wxObject *wxLibraries::CreateObject(const wxString& path)
+{
+    wxNode *node = m_loaded.First();
+    wxObject *obj;
+
+    while (node) {
+        obj = ((wxLibrary *)node->Data())->CreateObject(path);
+        if (obj)
+            return obj;
+
+        node = node->Next();

     }
     }

-    //else: not found in the path, leave the name as is (secutiry risk?)
+    return NULL;
+}
+
+#ifdef __DARWIN__
+// ---------------------------------------------------------------------------
+// For Darwin/Mac OS X
+//   supply the sun style dlopen functions in terms of Darwin NS*
+// ---------------------------------------------------------------------------

 
 

-#endif // __UNIX__
+extern "C" {
+#import <mach-o/dyld.h>
+};

 
 

-    wxDllType handle;
+enum dyldErrorSource
+{
+    OFImage,
+};

 
 

-#if defined(__WXMAC__)
-    FSSpec myFSSpec ;
-    Ptr        myMainAddr ;
-    Str255     myErrName ;
+static char dl_last_error[1024];

 
 

-    wxMacPathToFSSpec( lib_name , &myFSSpec ) ;
-    if (GetDiskFragment( &myFSSpec , 0 , kCFragGoesToEOF , "\p" , kPrivateCFragCopy , &handle , &myMainAddr ,
-                myErrName ) != noErr )
+static
+void TranslateError(const char *path, enum dyldErrorSource type, int number)
+{
+    unsigned int index;
+    static char *OFIErrorStrings[] =

     {
     {

-        p2cstr( myErrName ) ;
-        wxASSERT_MSG( 1 , (char*)myErrName ) ;
-        return NULL ;
-    }
-#else // !Mac
-    handle = wxDllOpen(lib_name);
-#endif // OS
-
-    if ( !handle )
+       "%s(%d): Object Image Load Failure\n",
+       "%s(%d): Object Image Load Success\n",
+       "%s(%d): Not an recognisable object file\n",
+       "%s(%d): No valid architecture\n",
+       "%s(%d): Object image has an invalid format\n",
+       "%s(%d): Invalid access (permissions?)\n",
+       "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
+    };
+#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
+
+    switch (type)

     {
     {

-        wxLogSysError(_("Failed to load shared library '%s'"),
-                      lib_name.c_str());
-
-        return NULL;
+     case OFImage:
+        index = number;
+        if (index > NUM_OFI_ERRORS - 1) {
+            index = NUM_OFI_ERRORS - 1;
+        }
+        sprintf(dl_last_error, OFIErrorStrings[index], path, number);
+        break;
+        
+     default:
+        sprintf(dl_last_error, "%s(%d): Totally unknown error type %d\n",
+                path, number, type);
+        break;

     }
     }

+}

 
 

-    lib = new wxLibrary(handle);
+const char *dlerror()
+{
+    return dl_last_error;
+}

 
 

-    wxClassInfo::sm_first = old_sm_first;
+void *dlopen(const char *path, int mode /* mode is ignored */)
+{
+    int dyld_result;
+    NSObjectFileImage ofile;
+    NSModule handle = NULL;

 
 

-    m_loaded.Append(name.GetData(), lib);
+    dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
+    if (dyld_result != NSObjectFileImageSuccess)
+    {
+       TranslateError(path, OFImage, dyld_result);
+    }
+    else
+    {
+       // NSLinkModule will cause the run to abort on any link error's
+       // not very friendly but the error recovery functionality is limited.
+       handle = NSLinkModule(ofile, path, TRUE);
+    }

 
 

-    return lib;
+    return handle;

 }
 
 }
 

-wxObject *wxLibraries::CreateObject(const wxString& path)
+int dlclose(void *handle) /* stub only */

 {
 {

-    wxNode *node = m_loaded.First();
-    wxObject *obj;
+    return 0;
+}

 
 

-    while (node) {
-        obj = ((wxLibrary *)node->Data())->CreateObject(path);
-        if (obj)
-            return obj;
+void *dlsym(void *handle, const char *symbol)
+{
+    void *addr;

 
 

-        node = node->Next();
+    if (NSIsSymbolNameDefined(symbol)) {
+       addr = NSAddressOfSymbol(NSLookupAndBindSymbol(symbol));

     }
     }

-    return NULL;
+    else {
+       addr = NULL;
+    }
+    return addr;

 }
 
 }
 

+#endif // __DARWIN__
+

 #endif // wxUSE_DYNLIB_CLASS
 #endif // wxUSE_DYNLIB_CLASS