www.pudn.com > zlIP-8051-rtl8019as.zip > GloblDef.c

/* 
 * Copyright (c) 2003 Electric Application Laboratory of NAN KAI University 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution. 
 * 3. The name of the author may not be used to endorse or promote products 
 *    derived from this software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE. 
 * 
 * Author: Li Zhanglin  
 * 
 */ 
 
#include "..\GloblDef\GloblDef.h" 
 
#ifdef MCU_C51 
/* assume a fun return a pointer to a address. If it return 
NULL, we assume it return a error. but in 51 MCU a value at  
address 0 of xdata is possible. To a avoid other value use  
address 0 we define a value at address by KeilC keyword _at_ */ 
BYTE DT_XDATA OmitAddr0 _at_ 0; 
#endif 
 
#ifndef HOST_ORDER_AS_NET	 
DWORD ntohl(DWORD in) REENTRANT_SIG 
{ 
	DWORD out; 
	out = (in<<24) | ((in<<8)&(0x00FF0000)) | ((in>>8)&(0x0000FF00)) | (in>>24) ; 
	return out; 
} 
 
WORD ntohs(WORD in) REENTRANT_SIG 
{ 
	WORD out; 
	out = (in<<8) | (in>>8); 
	return out; 
} 
#endif 
 
/* MemCopy offered by normal C lib */ 
void MemCopy(void DT_XDATA *buf1,void DT_XDATA *buf2,WORD size) REENTRANT_SIG 
{ 
	BYTE DT_XDATA * EndBuf; 
	for(EndBuf = (BYTE DT_XDATA *)buf1 + size; EndBuf != (BYTE DT_XDATA *)buf1;) 
	{ 
		*((BYTE DT_XDATA *)buf1)++ = *((BYTE DT_XDATA *)buf2)++; 
	} 
}