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/*
* plugin_win32.c
*
* $Id: plugin_win32.c,v 1.3 2009/04/09 17:53:08 source Exp $
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include "plugin.h"
extern int _gate_export (void *tgt);
static char *get_win_error (void)
{
DWORD err;
LPVOID errbuf = NULL;
err = GetLastError();
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &errbuf,
0,
NULL );
if ((NULL != errbuf) && ('\0' != ((char *)errbuf)[0]))
{
char *last = (char *)errbuf;
last += strlen(last)-1;
if (('\n' == last[0]) || ('\r' == last[0]))
last[0] = '\0';
}
return errbuf;
}
unit_version_t *uv_load_and_check_plugin(
char *file_name, char *function_name,
unit_version_t *dock_version, void *appdata)
{
char fname[_MAX_PATH];
int fnameidx;
HMODULE dll;
unit_check_t CALLBACK *check_callback;
unit_version_t *res;
FILE *test;
for (fnameidx = 0; fnameidx < (_MAX_PATH-5); fnameidx++)
{
char c = file_name[fnameidx];
if ('\0' == c)
break;
fname[fnameidx] = (('/' == c) ? '\\' : c);
}
strcpy (fname+fnameidx, ".dll");
test = fopen (fname, "rb");
if (NULL == test)
{
res = calloc (1, sizeof (unit_version_t));
res->uv_filename = strdup (fname);
res->uv_load_error = "Unable to locate file";
return res;
}
fclose (test);
dll = LoadLibrary (fname);
if (NULL == dll)
{
res = calloc (1, sizeof (unit_version_t));
res->uv_filename = strdup (fname);
res->uv_load_error = get_win_error();
return res;
}
if (NULL == function_name)
{
res = calloc (1, sizeof (unit_version_t));
res->uv_filename = strdup (fname);
res->uv_load_error = NULL;
return res;
}
check_callback = (unit_check_t CALLBACK *) GetProcAddress (dll, function_name);
if (NULL == check_callback)
{
FreeLibrary (dll);
res = calloc (1, sizeof (unit_version_t));
res->uv_filename = strdup (fname);
res->uv_load_error = get_win_error();
return res;
}
res = check_callback (dock_version, appdata);
if (NULL == res)
{
FreeLibrary (dll);
res = calloc (1, sizeof (unit_version_t));
res->uv_filename = strdup (fname);
res->uv_load_error = get_win_error();
/* FreeLibrary (dll); -- result we will return now is in dll's address space */
return res;
}
res->uv_filename = strdup (fname);
if (NULL != res->uv_load_error)
{
/* FreeLibrary (dll); -- result we will return now is in dll's address space */
return res;
}
if (NULL == res->uv_gate)
{
/* FreeLibrary (dll); -- result we will return now is in dll's address space */
res->uv_load_error = "Loaded plugin is not compatible with your version of Windows";
return res;
}
if (0 != _gate_export (res->uv_gate))
{
/* FreeLibrary (dll); -- result we will return now is in dll's address space */
res->uv_load_error = "Loaded plugin requires core functionality not provided by main application";
return res;
}
return res;
}
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