/*

 * Windows backend common header for libusb 1.0

 *

 * This file brings together header code common between

 * the desktop Windows and Windows CE backends.

 * Copyright © 2012-2013 RealVNC Ltd.

 * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>

 * With contributions from Michael Plante, Orin Eman et al.

 * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer

 * Major code testing contribution by Xiaofan Chen

 *

 * This library 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 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#pragma once

// Windows API default is uppercase - ugh!

#if !defined(bool)

#define bool BOOL

#endif

#if !defined(true)

#define true TRUE

#endif

#if !defined(false)

#define false FALSE

#endif

#define EPOCH_TIME	UINT64_C(116444736000000000)	// 1970.01.01 00:00:000 in MS Filetime

#if defined(__CYGWIN__ )

#define _stricmp strcasecmp

#define _strdup strdup

// _beginthreadex is MSVCRT => unavailable for cygwin. Fallback to using CreateThread

#define _beginthreadex(a, b, c, d, e, f) CreateThread(a, b, (LPTHREAD_START_ROUTINE)c, d, e, (LPDWORD)f)

#endif

#define safe_free(p) do {if (p != NULL) {free((void *)p); p = NULL;}} while (0)

#ifndef ARRAYSIZE

#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))

#endif

#define ERR_BUFFER_SIZE	256

/*

 * API macros - leveraged from libusb-win32 1.x

 */

#ifndef _WIN32_WCE

#define DLL_STRINGIFY(s) #s

#define DLL_LOAD_LIBRARY(name) LoadLibraryA(DLL_STRINGIFY(name))

#else

#define DLL_STRINGIFY(s) L#s

#define DLL_LOAD_LIBRARY(name) LoadLibrary(DLL_STRINGIFY(name))

#endif

/*

 * Macros for handling DLL themselves

 */

#define DLL_HANDLE_NAME(name) __dll_##name##_handle

#define DLL_DECLARE_HANDLE(name)				\

	static HMODULE DLL_HANDLE_NAME(name) = NULL

#define DLL_GET_HANDLE(name)					\

	do {							\

		DLL_HANDLE_NAME(name) = DLL_LOAD_LIBRARY(name);	\

		if (!DLL_HANDLE_NAME(name))			\

			return FALSE;				\

	} while (0)

#define DLL_FREE_HANDLE(name)					\

	do {							\

		if (DLL_HANDLE_NAME(name)) {			\

			FreeLibrary(DLL_HANDLE_NAME(name));	\

			DLL_HANDLE_NAME(name) = NULL;		\

		}						\

	} while (0)

/*

 * Macros for handling functions within a DLL

 */

#define DLL_FUNC_NAME(name) __dll_##name##_func_t

#define DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefixname, name, args)	\

	typedef ret (api * DLL_FUNC_NAME(name))args;			\

	static DLL_FUNC_NAME(name) prefixname = NULL

#define DLL_DECLARE_FUNC(api, ret, name, args)				\

	DLL_DECLARE_FUNC_PREFIXNAME(api, ret, name, name, args)

#define DLL_DECLARE_FUNC_PREFIXED(api, ret, prefix, name, args)		\

	DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefix##name, name, args)

#define DLL_LOAD_FUNC_PREFIXNAME(dll, prefixname, name, ret_on_failure)	\

	do {								\

		HMODULE h = DLL_HANDLE_NAME(dll);			\

		prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,	\

				DLL_STRINGIFY(name));			\

		if (prefixname)						\

			break;						\

		prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,	\

				DLL_STRINGIFY(name) DLL_STRINGIFY(A));	\

		if (prefixname)						\

			break;						\

		prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,	\

				DLL_STRINGIFY(name) DLL_STRINGIFY(W));	\

		if (prefixname)						\

			break;						\

		if (ret_on_failure)					\

			return FALSE;					\

	} while (0)

#define DLL_LOAD_FUNC(dll, name, ret_on_failure)			\

	DLL_LOAD_FUNC_PREFIXNAME(dll, name, name, ret_on_failure)

#define DLL_LOAD_FUNC_PREFIXED(dll, prefix, name, ret_on_failure)	\

	DLL_LOAD_FUNC_PREFIXNAME(dll, prefix##name, name, ret_on_failure)