Adam Green / Mbed 2 deprecated WeatherStation

Web server based weather station using Sparkfun Weather Meters.

Dependencies:   FatFileSystem mbed WeatherMeters SDFileSystem

NetStack/lwip/core/def.c@1:c7958aa34fa1, 2012-02-25 (annotated)

Committer:
AdamGreen
Date:
Sat Feb 25 03:28:05 2012 +0000
Revision:
1:c7958aa34fa1
Parent:
0:616601bde9fb 
Use published libraries where possible.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:616601bde9fb 1 /**
AdamGreen 0:616601bde9fb 2 * @file
AdamGreen 0:616601bde9fb 3 * Common functions used throughout the stack.
AdamGreen 0:616601bde9fb 4 *
AdamGreen 0:616601bde9fb 5 */
AdamGreen 0:616601bde9fb 6
AdamGreen 0:616601bde9fb 7 /*
AdamGreen 0:616601bde9fb 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
AdamGreen 0:616601bde9fb 9 * All rights reserved.
AdamGreen 0:616601bde9fb 10 *
AdamGreen 0:616601bde9fb 11 * Redistribution and use in source and binary forms, with or without modification,
AdamGreen 0:616601bde9fb 12 * are permitted provided that the following conditions are met:
AdamGreen 0:616601bde9fb 13 *
AdamGreen 0:616601bde9fb 14 * 1. Redistributions of source code must retain the above copyright notice,
AdamGreen 0:616601bde9fb 15 * this list of conditions and the following disclaimer.
AdamGreen 0:616601bde9fb 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
AdamGreen 0:616601bde9fb 17 * this list of conditions and the following disclaimer in the documentation
AdamGreen 0:616601bde9fb 18 * and/or other materials provided with the distribution.
AdamGreen 0:616601bde9fb 19 * 3. The name of the author may not be used to endorse or promote products
AdamGreen 0:616601bde9fb 20 * derived from this software without specific prior written permission.
AdamGreen 0:616601bde9fb 21 *
AdamGreen 0:616601bde9fb 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
AdamGreen 0:616601bde9fb 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
AdamGreen 0:616601bde9fb 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
AdamGreen 0:616601bde9fb 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
AdamGreen 0:616601bde9fb 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
AdamGreen 0:616601bde9fb 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
AdamGreen 0:616601bde9fb 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
AdamGreen 0:616601bde9fb 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
AdamGreen 0:616601bde9fb 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
AdamGreen 0:616601bde9fb 31 * OF SUCH DAMAGE.
AdamGreen 0:616601bde9fb 32 *
AdamGreen 0:616601bde9fb 33 * This file is part of the lwIP TCP/IP stack.
AdamGreen 0:616601bde9fb 34 *
AdamGreen 0:616601bde9fb 35 * Author: Simon Goldschmidt
AdamGreen 0:616601bde9fb 36 *
AdamGreen 0:616601bde9fb 37 */
AdamGreen 0:616601bde9fb 38
AdamGreen 0:616601bde9fb 39 #include "lwip/opt.h"
AdamGreen 0:616601bde9fb 40 #include "lwip/def.h"
AdamGreen 0:616601bde9fb 41
AdamGreen 0:616601bde9fb 42 /**
AdamGreen 0:616601bde9fb 43 * These are reference implementations of the byte swapping functions.
AdamGreen 0:616601bde9fb 44 * Again with the aim of being simple, correct and fully portable.
AdamGreen 0:616601bde9fb 45 * Byte swapping is the second thing you would want to optimize. You will
AdamGreen 0:616601bde9fb 46 * need to port it to your architecture and in your cc.h:
AdamGreen 0:616601bde9fb 47 *
AdamGreen 0:616601bde9fb 48 * #define LWIP_PLATFORM_BYTESWAP 1
AdamGreen 0:616601bde9fb 49 * #define LWIP_PLATFORM_HTONS(x) <your_htons>
AdamGreen 0:616601bde9fb 50 * #define LWIP_PLATFORM_HTONL(x) <your_htonl>
AdamGreen 0:616601bde9fb 51 *
AdamGreen 0:616601bde9fb 52 * Note ntohs() and ntohl() are merely references to the htonx counterparts.
AdamGreen 0:616601bde9fb 53 */
AdamGreen 0:616601bde9fb 54
AdamGreen 0:616601bde9fb 55 #if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
AdamGreen 0:616601bde9fb 56
AdamGreen 0:616601bde9fb 57 /**
AdamGreen 0:616601bde9fb 58 * Convert an u16_t from host- to network byte order.
AdamGreen 0:616601bde9fb 59 *
AdamGreen 0:616601bde9fb 60 * @param n u16_t in host byte order
AdamGreen 0:616601bde9fb 61 * @return n in network byte order
AdamGreen 0:616601bde9fb 62 */
AdamGreen 0:616601bde9fb 63 u16_t
AdamGreen 0:616601bde9fb 64 lwip_htons(u16_t n)
AdamGreen 0:616601bde9fb 65 {
AdamGreen 0:616601bde9fb 66 return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
AdamGreen 0:616601bde9fb 67 }
AdamGreen 0:616601bde9fb 68
AdamGreen 0:616601bde9fb 69 /**
AdamGreen 0:616601bde9fb 70 * Convert an u16_t from network- to host byte order.
AdamGreen 0:616601bde9fb 71 *
AdamGreen 0:616601bde9fb 72 * @param n u16_t in network byte order
AdamGreen 0:616601bde9fb 73 * @return n in host byte order
AdamGreen 0:616601bde9fb 74 */
AdamGreen 0:616601bde9fb 75 u16_t
AdamGreen 0:616601bde9fb 76 lwip_ntohs(u16_t n)
AdamGreen 0:616601bde9fb 77 {
AdamGreen 0:616601bde9fb 78 return lwip_htons(n);
AdamGreen 0:616601bde9fb 79 }
AdamGreen 0:616601bde9fb 80
AdamGreen 0:616601bde9fb 81 /**
AdamGreen 0:616601bde9fb 82 * Convert an u32_t from host- to network byte order.
AdamGreen 0:616601bde9fb 83 *
AdamGreen 0:616601bde9fb 84 * @param n u32_t in host byte order
AdamGreen 0:616601bde9fb 85 * @return n in network byte order
AdamGreen 0:616601bde9fb 86 */
AdamGreen 0:616601bde9fb 87 u32_t
AdamGreen 0:616601bde9fb 88 lwip_htonl(u32_t n)
AdamGreen 0:616601bde9fb 89 {
AdamGreen 0:616601bde9fb 90 return ((n & 0xff) << 24) |
AdamGreen 0:616601bde9fb 91 ((n & 0xff00) << 8) |
AdamGreen 0:616601bde9fb 92 ((n & 0xff0000UL) >> 8) |
AdamGreen 0:616601bde9fb 93 ((n & 0xff000000UL) >> 24);
AdamGreen 0:616601bde9fb 94 }
AdamGreen 0:616601bde9fb 95
AdamGreen 0:616601bde9fb 96 /**
AdamGreen 0:616601bde9fb 97 * Convert an u32_t from network- to host byte order.
AdamGreen 0:616601bde9fb 98 *
AdamGreen 0:616601bde9fb 99 * @param n u32_t in network byte order
AdamGreen 0:616601bde9fb 100 * @return n in host byte order
AdamGreen 0:616601bde9fb 101 */
AdamGreen 0:616601bde9fb 102 u32_t
AdamGreen 0:616601bde9fb 103 lwip_ntohl(u32_t n)
AdamGreen 0:616601bde9fb 104 {
AdamGreen 0:616601bde9fb 105 return lwip_htonl(n);
AdamGreen 0:616601bde9fb 106 }
AdamGreen 0:616601bde9fb 107
AdamGreen 0:616601bde9fb 108 #endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */