src/common/dynlib.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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) Guilhem Lavaux
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dynlib.h"
  14 #endif
  15
  16 #include <wx/dynlib.h>
  17 #include <wx/filefn.h>
  18 #include <wx/list.h>
  19 #include <wx/string.h>
  20
  21 // ---------------------------------------------------------------------------
  22 // System dependent include
  23 // ---------------------------------------------------------------------------
  24
  25 #if defined(__LINUX__) || defined(__SGI__)
  26 #include <dlfcn.h>
  27 #endif
  28
  29 #ifdef __WINDOWS__
  30 #include <windows.h>
  31 #endif
  32
  33 // ---------------------------------------------------------------------------
  34 // Global variables
  35 // ---------------------------------------------------------------------------
  36
  37 wxLibraries wxTheLibraries;
  38
  39 // ---------------------------------------------------------------------------
  40 // wxLibrary (one instance per dynamic library
  41 // ---------------------------------------------------------------------------
  42
  43 wxLibrary::wxLibrary(void *handle)
  44 {
  45   typedef wxClassLibrary *(*t_get_list)(void);
  46   t_get_list get_list;
  47
  48   m_handle = handle;
  49
  50   get_list = (t_get_list)GetSymbol("GetClassList");
  51   m_liblist = (*get_list)();
  52 }
  53
  54 wxLibrary::~wxLibrary()
  55 {
  56   if (m_handle) {
  57     typedef void (*t_free_list)(wxClassLibrary *);
  58     t_free_list free_list;
  59
  60     free_list = (t_free_list) GetSymbol("FreeClassList");
  61     if (free_list != NULL)
  62       free_list(m_liblist);
  63     else
  64       delete m_liblist;
  65
  66 #if defined(__LINUX__) || defined(__SGI__)
  67     dlclose(m_handle);
  68 #endif
  69 #ifdef __WINDOWS__
  70     FreeLibrary((HMODULE)m_handle);
  71 #endif
  72   }
  73 }
  74
  75 wxObject *wxLibrary::CreateObject(const wxString& name)
  76 {
  77   return m_liblist->CreateObject(name);
  78 }
  79
  80 void *wxLibrary::GetSymbol(const wxString& symbname)
  81 {
  82 #if defined(__LINUX__) || defined(__SGI__)
  83   return dlsym(m_handle, WXSTRINGCAST symbname);
  84 #endif
  85 #ifdef __WINDOWS__
  86   return GetProcAddress(m_handle, WXSTRINGCAST symbname);
  87 #endif
  88   return NULL;
  89 }
  90
  91 // ---------------------------------------------------------------------------
  92 // wxLibraries (only one instance should normally exist)
  93 // ---------------------------------------------------------------------------
  94
  95 wxLibraries::wxLibraries()
  96 {
  97 }
  98
  99 wxLibraries::~wxLibraries()
 100 {
 101   wxNode *node = m_loaded.First();
 102
 103   while (node) {
 104     wxLibrary *lib = (wxLibrary *)node->Data();
 105     delete lib;
 106
 107     node = node->Next();
 108   }
 109 }
 110
 111 wxLibrary *wxLibraries::LoadLibrary(const wxString& name)
 112 {
 113   wxString lib_name = name;
 114   wxNode *node;
 115   wxLibrary *lib;
 116
 117   if ( (node = m_loaded.Find(name.GetData())) )
 118     return ((wxLibrary *)node->Data());
 119
 120 #if defined(__LINUX__) || defined(__SGI__)
 121   lib_name.Prepend("lib");
 122   lib_name += ".so";
 123
 124   printf("lib_name = %s\n", WXSTRINGCAST lib_name);
 125
 126   void *handle = dlopen(WXSTRINGCAST lib_name, RTLD_LAZY);
 127
 128   if (!handle)
 129     return NULL;
 130 #endif
 131 #ifdef __WINDOWS__
 132   lib_name += ".dll";
 133
 134   HMODULE handle = LoadLibrary(lib_name);
 135   if (!handle)
 136     return NULL;
 137 #endif
 138   lib = new wxLibrary((void *)handle);
 139
 140   m_loaded.Append(name.GetData(), lib);
 141   return lib;
 142 }
 143
 144 wxObject *wxLibraries::CreateObject(const wxString& path)
 145 {
 146   wxNode *node = m_loaded.First();
 147   wxObject *obj;
 148
 149   while (node) {
 150     obj = ((wxLibrary *)node->Data())->CreateObject(path);
 151     if (obj)
 152       return obj;
 153
 154     node = node->Next();
 155   }
 156   return NULL;
 157 }
 158
 159 // ---------------------------------------------------------------------------
 160 // wxClassLibrary (this class is used to access the internal class)
 161 // ---------------------------------------------------------------------------
 162
 163 wxClassLibrary::wxClassLibrary(void)
 164 {
 165 }
 166
 167 wxClassLibrary::~wxClassLibrary(void)
 168 {
 169   uint i;
 170
 171   for (i=0;i<m_list.Count();i++)
 172     delete (m_list[i]);
 173 }
 174
 175 void wxClassLibrary::RegisterClass(wxClassInfo *class_info,
 176                                    const wxString& path)
 177 {
 178   wxClassLibInfo *info = new wxClassLibInfo;
 179
 180   info->class_info = class_info;
 181   info->path = path;
 182   m_list.Add(info);
 183 }
 184
 185 void wxClassLibrary::UnregisterClass(wxClassInfo *class_info)
 186 {
 187   uint i = 0;
 188
 189   while (i < m_list.Count()) {
 190     if (m_list[i]->class_info == class_info) {
 191       delete (m_list[i]);
 192       m_list.Remove(i);
 193       return;
 194     }
 195     i++;
 196   }
 197 }
 198
 199 bool wxClassLibrary::CreateObjects(const wxString& path,
 200                                    wxArrayClassInfo& objs)
 201 {
 202   wxClassLibInfo *info;
 203   uint i = 0;
 204
 205   while (i < m_list.Count()) {
 206     info = m_list[i];
 207     if (wxMatchWild(path, info->path))
 208       objs.Add(info->class_info);
 209     i++;
 210   }
 211   return (i > 0);
 212 }
 213
 214 bool wxClassLibrary::FetchInfos(const wxString& path,
 215                                 wxArrayClassLibInfo& infos)
 216 {
 217   wxClassLibInfo *info;
 218   uint i = 0;
 219
 220   while (i < m_list.Count()) {
 221     info = m_list[i];
 222     if (wxMatchWild(path, info->path)) {
 223       wxClassLibInfo *inf = new wxClassLibInfo;
 224       *inf = *info;
 225       infos.Add(inf);
 226     }
 227     i++;
 228   }
 229   return (i > 0);
 230 }
 231
 232 wxObject *wxClassLibrary::CreateObject(const wxString& path)
 233 {
 234   wxClassLibInfo *info;
 235   uint i = 0;
 236
 237   while (i < m_list.Count()) {
 238     info = m_list[i];
 239     if (wxMatchWild(path, info->path))
 240       return info->class_info->CreateObject();
 241     i++;
 242   }
 243   return NULL;
 244 }