/* * Copyright (c) 2001, Swedish Institute of Computer Science. * 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. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels * * $Id: lib.c,v 1.1 2002/11/29 11:03:34 likewise Exp $ */ /* These are generic implementations of various library functions used * throughout the lwIP code. When porting, those should be optimized * for the particular processor architecture, preferably coded in * assembler. */ #include "lwip/arch.h" #if BYTE_ORDER == LITTLE_ENDIAN /*-----------------------------------------------------------------------------------*/ u16_t htons(u16_t n) { return ((n & 0xff) << 8) | ((n & 0xff00) >> 8); } /*-----------------------------------------------------------------------------------*/ u16_t ntohs(u16_t n) { return htons(n); } /*-----------------------------------------------------------------------------------*/ u32_t htonl(u32_t n) { return ((n & 0xff) << 24) | ((n & 0xff00) << 8) | ((n & 0xff0000) >> 8) | ((n & 0xff000000) >> 24); } /*-----------------------------------------------------------------------------------*/ u32_t ntohl(u32_t n) { return htonl(n); } /*-----------------------------------------------------------------------------------*/ #endif /* BYTE_ORDER == LITTLE_ENDIAN */ void bcopy(const void *src, void *dst, unsigned int size) { char *csrc, *cdst; int i; csrc = (char *)src; cdst = dst; for(i = 0; i < size; i++) { cdst[i] = csrc[i]; } } /*-----------------------------------------------------------------------------------*/ void bzero(void *s, int n) { for(n--; n > 0; n--) { ((char *)s)[n] = 0; } } /*-----------------------------------------------------------------------------------*/