You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
5.1 KiB
144 lines
5.1 KiB
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 2016 - 2017, Steve Holme, <steve_holme@hotmail.com>.
|
|
* Copyright (C) 2017, Expat development team
|
|
*
|
|
* All rights reserved.
|
|
* Licensed under the MIT license:
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
|
|
* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
|
|
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH
|
|
* THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Except as contained in this notice, the name of a copyright holder shall
|
|
* not be used in advertising or otherwise to promote the sale, use or other
|
|
* dealings in this Software without prior written authorization of the
|
|
* copyright holder.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#if defined(_WIN32)
|
|
|
|
#include <windows.h>
|
|
#include <tchar.h>
|
|
|
|
|
|
HMODULE _Expat_LoadLibrary(LPCTSTR filename);
|
|
|
|
|
|
#if !defined(LOAD_WITH_ALTERED_SEARCH_PATH)
|
|
#define LOAD_WITH_ALTERED_SEARCH_PATH 0x00000008
|
|
#endif
|
|
|
|
#if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32)
|
|
#define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800
|
|
#endif
|
|
|
|
/* We use our own typedef here since some headers might lack these */
|
|
typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD);
|
|
|
|
/* See function definitions in winbase.h */
|
|
#ifdef UNICODE
|
|
# ifdef _WIN32_WCE
|
|
# define LOADLIBARYEX L"LoadLibraryExW"
|
|
# else
|
|
# define LOADLIBARYEX "LoadLibraryExW"
|
|
# endif
|
|
#else
|
|
# define LOADLIBARYEX "LoadLibraryExA"
|
|
#endif
|
|
|
|
|
|
/*
|
|
* _Expat_LoadLibrary()
|
|
*
|
|
* This is used to dynamically load DLLs using the most secure method available
|
|
* for the version of Windows that we are running on.
|
|
*
|
|
* Parameters:
|
|
*
|
|
* filename [in] - The filename or full path of the DLL to load. If only the
|
|
* filename is passed then the DLL will be loaded from the
|
|
* Windows system directory.
|
|
*
|
|
* Returns the handle of the module on success; otherwise NULL.
|
|
*/
|
|
HMODULE _Expat_LoadLibrary(LPCTSTR filename)
|
|
{
|
|
HMODULE hModule = NULL;
|
|
LOADLIBRARYEX_FN pLoadLibraryEx = NULL;
|
|
|
|
/* Get a handle to kernel32 so we can access it's functions at runtime */
|
|
HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32"));
|
|
if(!hKernel32)
|
|
return NULL; /* LCOV_EXCL_LINE */
|
|
|
|
/* Attempt to find LoadLibraryEx() which is only available on Windows 2000
|
|
and above */
|
|
pLoadLibraryEx = (LOADLIBRARYEX_FN) GetProcAddress(hKernel32, LOADLIBARYEX);
|
|
|
|
/* Detect if there's already a path in the filename and load the library if
|
|
there is. Note: Both back slashes and forward slashes have been supported
|
|
since the earlier days of DOS at an API level although they are not
|
|
supported by command prompt */
|
|
if(_tcspbrk(filename, TEXT("\\/"))) {
|
|
/** !checksrc! disable BANNEDFUNC 1 **/
|
|
hModule = pLoadLibraryEx ?
|
|
pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
|
|
LoadLibrary(filename);
|
|
}
|
|
/* Detect if KB2533623 is installed, as LOAD_LIBARY_SEARCH_SYSTEM32 is only
|
|
supported on Windows Vista, Windows Server 2008, Windows 7 and Windows
|
|
Server 2008 R2 with this patch or natively on Windows 8 and above */
|
|
else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) {
|
|
/* Load the DLL from the Windows system directory */
|
|
hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
|
|
}
|
|
else {
|
|
/* Attempt to get the Windows system path */
|
|
UINT systemdirlen = GetSystemDirectory(NULL, 0);
|
|
if(systemdirlen) {
|
|
/* Allocate space for the full DLL path (Room for the null terminator
|
|
is included in systemdirlen) */
|
|
size_t filenamelen = _tcslen(filename);
|
|
TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen));
|
|
if(path && GetSystemDirectory(path, systemdirlen)) {
|
|
/* Calculate the full DLL path */
|
|
_tcscpy(path + _tcslen(path), TEXT("\\"));
|
|
_tcscpy(path + _tcslen(path), filename);
|
|
|
|
/* Load the DLL from the Windows system directory */
|
|
/** !checksrc! disable BANNEDFUNC 1 **/
|
|
hModule = pLoadLibraryEx ?
|
|
pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
|
|
LoadLibrary(path);
|
|
|
|
}
|
|
free(path);
|
|
}
|
|
}
|
|
|
|
return hModule;
|
|
}
|
|
|
|
#else /* defined(_WIN32) */
|
|
|
|
/* ISO C requires a translation unit to contain at least one declaration
|
|
[-Wempty-translation-unit] */
|
|
typedef int _TRANSLATION_UNIT_LOAD_LIBRARY_C_NOT_EMTPY;
|
|
|
|
#endif /* defined(_WIN32) */
|