/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * File: tmacro.h
 *
 * Purpose: define basic common types and macros
 *
 * Author: Tevin Chen
 *
 * Date: May 21, 1996
 *
 */


#ifndef __TMACRO_H__
#define __TMACRO_H__


#if !defined(__TTYPE_H__)
#include "ttype.h"
#endif


/****** Common helper macros ***********************************************/

#if !defined(LONIBBLE)
#define LONIBBLE(b)         ((BYTE)(b) & 0x0F)
#endif
#if !defined(HINIBBLE)
#define HINIBBLE(b)         ((BYTE)(((WORD)(b) >> 4) & 0x0F))
#endif

#if !defined(LOBYTE)
#define LOBYTE(w)           ((BYTE)(w))
#endif
#if !defined(HIBYTE)
#define HIBYTE(w)           ((BYTE)(((WORD)(w) >> 8) & 0xFF))
#endif

#if !defined(LOWORD)
#define LOWORD(d)           ((WORD)(d))
#endif
#if !defined(HIWORD)
#define HIWORD(d)           ((WORD)((((DWORD)(d)) >> 16) & 0xFFFF))
#endif

#define LODWORD(q)          ((q).u.dwLowDword)
#define HIDWORD(q)          ((q).u.dwHighDword)


#if !defined(MAKEBYTE)
#define MAKEBYTE(ln, hn)    ((BYTE)(((BYTE)(ln) & 0x0F) | ((BYTE)(hn) << 4)))
#endif
#if !defined(MAKEWORD)
#define MAKEWORD(lb, hb)    ((WORD)(((BYTE)(lb)) | (((WORD)((BYTE)(hb))) << 8)))
#endif
#if !defined(MAKEDWORD)
#define MAKEDWORD(lw, hw)   ((DWORD)(((WORD)(lw)) | (((DWORD)((WORD)(hw))) << 16)))
#endif
#if !defined(MAKEQWORD)
#define MAKEQWORD(ld, hd, pq) {pq->u.dwLowDword = ld; pq->u.dwHighDword = hd;}
#endif

#if !defined(MAKELONG)
#define MAKELONG(low, high) ((LONG)(((WORD)(low)) | (((DWORD)((WORD)(high))) << 16)))
#endif


// Bytes Reverse: big endian to little endian convert
#if !defined(REVWORD)
#define REVWORD(w) ((WORD)( ((WORD)(w) >> 8) | ((WORD)(w) << 8) ))
#endif
#if !defined(REVDWORD)
#define REVDWORD(d) (MAKEDWORD(MAKEWORD(HIBYTE(HIWORD(d)),LOBYTE(HIWORD(d))),MAKEWORD(HIBYTE(LOWORD(d)),LOBYTE(LOWORD(d)))))
#endif

/* map to known network names */
/*
#define ntohs(x)        REVWORD(x)
#define ntohl(x)        REVDWORD(x)
#define htons(x)        REVWORD(x)
#define htonl(x)        REVDWORD(x)
*/


/*
#ifndef NOMINMAX
#ifndef max
#define max(a,b)            (((a) > (b)) ? (a) : (b))
#endif
#ifndef min
#define min(a,b)            (((a) < (b)) ? (a) : (b))
#endif
#endif // NOMINMAX
*/


/****** Misc macros ********************************************************/

// get the field offset in the type(struct, class, ...)
#define OFFSET(type, field) ((int)(&((type NEAR*)1)->field)-1)


/* string equality shorthand */
#define STR_EQ(x, y)        (strcmp(x, y) == 0)
#define STR_NE(x, y)        (strcmp(x, y) != 0)


// calculate element # of array
#define ELEMENT_NUM(array)  (sizeof(array) / sizeof(array[0]))
//#define ARRAY_SIZE(a)       (sizeof(a) / sizeof(a[0]))


// null statement
#define NULL_FUNC()


/* Since not all compilers support structure assignment, the ASSIGN()
 * macro is used. This controls how it's actually implemented.
 */
#ifdef	NOSTRUCTASSIGN	/* Version for old compilers that don't support it */
#define	ASSIGN(a,b)	memcpy((char *)&(a),(char *)&(b),sizeof(b);
#else			/* Version for compilers that do */
#define	ASSIGN(a,b)	((a) = (b))
#endif


#endif // __TMACRO_H__