+++ /dev/null
-/* loader-loadlibrary.c -- dynamic linking for Win32
-
- Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006,
- 2007, 2008 Free Software Foundation, Inc.
- Written by Thomas Tanner, 1998
-
- NOTE: The canonical source of this file is maintained with the
- GNU Libtool package. Report bugs to bug-libtool@gnu.org.
-
-GNU Libltdl is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2 of the License, or (at your option) any later version.
-
-As a special exception to the GNU Lesser General Public License,
-if you distribute this file as part of a program or library that
-is built using GNU Libtool, you may include this file under the
-same distribution terms that you use for the rest of that program.
-
-GNU Libltdl 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 Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with GNU Libltdl; see the file COPYING.LIB. If not, a
-copy can be downloaded from http://www.gnu.org/licenses/lgpl.html,
-or obtained by writing to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-*/
-
-#include "lt__private.h"
-#include "lt_dlloader.h"
-
-#if defined(__CYGWIN__)
-# include <sys/cygwin.h>
-#endif
-
-/* Use the preprocessor to rename non-static symbols to avoid namespace
- collisions when the loader code is statically linked into libltdl.
- Use the "<module_name>_LTX_" prefix so that the symbol addresses can
- be fetched from the preloaded symbol list by lt_dlsym(): */
-#define get_vtable loadlibrary_LTX_get_vtable
-
-LT_BEGIN_C_DECLS
-LT_SCOPE lt_dlvtable *get_vtable (lt_user_data loader_data);
-LT_END_C_DECLS
-
-
-/* Boilerplate code to set up the vtable for hooking this loader into
- libltdl's loader list: */
-static int vl_exit (lt_user_data loader_data);
-static lt_module vm_open (lt_user_data loader_data, const char *filename,
- lt_dladvise advise);
-static int vm_close (lt_user_data loader_data, lt_module module);
-static void * vm_sym (lt_user_data loader_data, lt_module module,
- const char *symbolname);
-
-static lt_dlinterface_id iface_id = 0;
-static lt_dlvtable *vtable = 0;
-
-/* Return the vtable for this loader, only the name and sym_prefix
- attributes (plus the virtual function implementations, obviously)
- change between loaders. */
-lt_dlvtable *
-get_vtable (lt_user_data loader_data)
-{
- if (!vtable)
- {
- vtable = (lt_dlvtable *) lt__zalloc (sizeof *vtable);
- iface_id = lt_dlinterface_register ("ltdl loadlibrary", NULL);
- }
-
- if (vtable && !vtable->name)
- {
- vtable->name = "lt_loadlibrary";
- vtable->module_open = vm_open;
- vtable->module_close = vm_close;
- vtable->find_sym = vm_sym;
- vtable->dlloader_exit = vl_exit;
- vtable->dlloader_data = loader_data;
- vtable->priority = LT_DLLOADER_APPEND;
- }
-
- if (vtable && (vtable->dlloader_data != loader_data))
- {
- LT__SETERROR (INIT_LOADER);
- return 0;
- }
-
- return vtable;
-}
-
-
-
-/* --- IMPLEMENTATION --- */
-
-
-#include <windows.h>
-
-/* A function called through the vtable when this loader is no
- longer needed by the application. */
-static int
-vl_exit (lt_user_data LT__UNUSED loader_data)
-{
- vtable = NULL;
- return 0;
-}
-
-/* A function called through the vtable to open a module with this
- loader. Returns an opaque representation of the newly opened
- module for processing with this loader's other vtable functions. */
-static lt_module
-vm_open (lt_user_data LT__UNUSED loader_data, const char *filename,
- lt_dladvise LT__UNUSED advise)
-{
- lt_module module = 0;
- char *ext;
- char wpath[MAX_PATH];
- size_t len;
-
- if (!filename)
- {
- /* Get the name of main module */
- *wpath = 0;
- GetModuleFileName (NULL, wpath, sizeof (wpath));
- filename = wpath;
- }
- else
- {
- len = LT_STRLEN (filename);
-
- if (len >= MAX_PATH)
- {
- LT__SETERROR (CANNOT_OPEN);
- return 0;
- }
-
-#if HAVE_DECL_CYGWIN_CONV_PATH
- if (cygwin_conv_path (CCP_POSIX_TO_WIN_A, filename, wpath, MAX_PATH))
- {
- LT__SETERROR (CANNOT_OPEN);
- return 0;
- }
- len = 0;
-#elif defined(__CYGWIN__)
- cygwin_conv_to_full_win32_path (filename, wpath);
- len = 0;
-#else
- strcpy(wpath, filename);
-#endif
-
- ext = strrchr (wpath, '.');
- if (!ext)
- {
- /* Append a `.' to stop Windows from adding an
- implicit `.dll' extension. */
- if (!len)
- len = LT_STRLEN (wpath);
-
- if (len + 1 >= MAX_PATH)
- {
- LT__SETERROR (CANNOT_OPEN);
- return 0;
- }
-
- wpath[len] = '.';
- wpath[len+1] = '\0';
- }
- }
-
- {
- /* Silence dialog from LoadLibrary on some failures.
- No way to get the error mode, but to set it,
- so set it twice to preserve any previous flags. */
- UINT errormode = SetErrorMode(SEM_FAILCRITICALERRORS);
- SetErrorMode(errormode | SEM_FAILCRITICALERRORS);
-
- module = LoadLibrary (wpath);
-
- /* Restore the error mode. */
- SetErrorMode(errormode);
- }
-
- /* libltdl expects this function to fail if it is unable
- to physically load the library. Sadly, LoadLibrary
- will search the loaded libraries for a match and return
- one of them if the path search load fails.
-
- We check whether LoadLibrary is returning a handle to
- an already loaded module, and simulate failure if we
- find one. */
- {
- lt_dlhandle cur = 0;
-
- while ((cur = lt_dlhandle_iterate (iface_id, cur)))
- {
- if (!cur->module)
- {
- cur = 0;
- break;
- }
-
- if (cur->module == module)
- {
- break;
- }
- }
-
- if (cur || !module)
- {
- LT__SETERROR (CANNOT_OPEN);
- module = 0;
- }
- }
-
- return module;
-}
-
-
-/* A function called through the vtable when a particular module
- should be unloaded. */
-static int
-vm_close (lt_user_data LT__UNUSED loader_data, lt_module module)
-{
- int errors = 0;
-
- if (FreeLibrary((HMODULE) module) == 0)
- {
- LT__SETERROR (CANNOT_CLOSE);
- ++errors;
- }
-
- return errors;
-}
-
-
-/* A function called through the vtable to get the address of
- a symbol loaded from a particular module. */
-static void *
-vm_sym (lt_user_data LT__UNUSED loader_data, lt_module module, const char *name)
-{
- void *address = (void *) GetProcAddress ((HMODULE) module, name);
-
- if (!address)
- {
- LT__SETERROR (SYMBOL_NOT_FOUND);
- }
-
- return address;
-}
HCoop / hcoop / debian / courier-authlib.git / blobdiff