modules/plugin/sdk/samples/npthread/windows/plugload.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is mozilla.org code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
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  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include "windows.h"
  39
  40 DWORD GetPluginsDir(char * path, DWORD maxsize)
  41 {
  42   if(!path)
  43     return 0;
  44
  45   path[0] = '\0';
  46
  47   DWORD res = GetModuleFileName(NULL, path, maxsize);
  48   if(res == 0)
  49     return 0;
  50
  51   if(path[strlen(path) - 1] == '\\')
  52     path[lstrlen(path) - 1] = '\0';
  53
  54   char *p = strrchr(path, '\\');
  55
  56   if(p)
  57     *p = '\0';
  58
  59   strcat(path, "\\plugins");
  60
  61   res = strlen(path);
  62   return res;
  63 }
  64
  65 HINSTANCE LoadRealPlugin(char * mimetype)
  66 {
  67   if(!mimetype || !strlen(mimetype))
  68     return NULL;
  69
  70   BOOL bDone = FALSE;
  71   WIN32_FIND_DATA ffdataStruct;
  72
  73   char szPath[_MAX_PATH];
  74   char szFileName[_MAX_PATH];
  75
  76   GetPluginsDir(szPath, _MAX_PATH);
  77
  78   strcpy(szFileName, szPath);
  79   strcat(szFileName, "\\00*");
  80
  81   HANDLE handle = FindFirstFile(szFileName, &ffdataStruct);
  82   if(handle == INVALID_HANDLE_VALUE) {
  83     FindClose(handle);
  84     return NULL;
  85   }
  86
  87   DWORD versize = 0L;
  88   DWORD zero = 0L;
  89   char * verbuf = NULL;
  90
  91   do {
  92     strcpy(szFileName, szPath);
  93     strcat(szFileName, "\\");
  94     strcat(szFileName, ffdataStruct.cFileName);
  95     if(!(ffdataStruct. dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
  96       versize = GetFileVersionInfoSize(szFileName, &zero);
  97             if (versize > 0)
  98                     verbuf = new char[versize];
  99       else
 100         continue;
 101
 102       if(!verbuf)
 103                     continue;
 104
 105       GetFileVersionInfo(szFileName, NULL, versize, verbuf);
 106
 107       char *mimetypes = NULL;
 108       UINT len = 0;
 109
 110       if(!VerQueryValue(verbuf, "\\StringFileInfo\\040904E4\\MIMEType", (void **)&mimetypes, &len)
 111          || !mimetypes || !len) {
 112         delete [] verbuf;
 113         continue;
 114       }
 115
 116       // browse through a string of mimetypes
 117       mimetypes[len] = '\0';
 118       char * type = mimetypes;
 119
 120       BOOL more = TRUE;
 121       while(more) {
 122         char * p = strchr(type, '|');
 123         if(p)
 124           *p = '\0';
 125         else
 126           more = FALSE;
 127
 128         if(0 == stricmp(mimetype, type)) {
 129           // this is it!
 130           delete [] verbuf;
 131           FindClose(handle);
 132           HINSTANCE hLib = LoadLibrary(szFileName);
 133           return hLib;
 134         }
 135
 136         type = p;
 137         type++;
 138       }
 139
 140       delete [] verbuf;
 141     }
 142
 143   } while(FindNextFile(handle, &ffdataStruct));
 144
 145   FindClose(handle);
 146   return NULL;
 147 }
 148
 149 void UnloadRealPlugin(HINSTANCE hLib)
 150 {
 151   if(!hLib)
 152     FreeLibrary(hLib);
 153 }