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74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
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/*
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* Copyright (c) 2001, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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* $Id: lib.c,v 1.1 2003/01/18 18:21:57 jani Exp $
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*/
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/* These are generic implementations of various library functions used
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* throughout the lwIP code. When porting, those should be optimized
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* for the particular processor architecture, preferably coded in
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* assembler.
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*/
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#include "lwip/arch.h"
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#if BYTE_ORDER == LITTLE_ENDIAN
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/*-----------------------------------------------------------------------------------*/
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u16_t
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htons(u16_t n)
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{
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return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
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}
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/*-----------------------------------------------------------------------------------*/
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u16_t
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ntohs(u16_t n)
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{
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return htons(n);
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}
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/*-----------------------------------------------------------------------------------*/
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u32_t
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htonl(u32_t n)
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{
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return ((n & 0xff) << 24) |
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((n & 0xff00) << 8) |
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((n & 0xff0000) >> 8) |
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((n & 0xff000000) >> 24);
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}
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/*-----------------------------------------------------------------------------------*/
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u32_t
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ntohl(u32_t n)
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{
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return htonl(n);
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}
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/*-----------------------------------------------------------------------------------*/
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#endif /* BYTE_ORDER == LITTLE_ENDIAN */
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