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/*
* 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__
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