Yann Garcia / Mbed 2 deprecated DS130x_I2CApp

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Dependencies:   mbed DebugLibrary

NetServices/lwip/core/def.c@1:995212d326ca, 2011-02-11 (annotated)

Committer:
Yann
Date:
Fri Feb 11 10:17:20 2011 +0000
Revision:
1:995212d326ca
Parent:
0:f30e2135b0db 
V0.0.0.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yann 0:f30e2135b0db 1 /**
Yann 0:f30e2135b0db 2 * @file
Yann 0:f30e2135b0db 3 * Common functions used throughout the stack.
Yann 0:f30e2135b0db 4 *
Yann 0:f30e2135b0db 5 */
Yann 0:f30e2135b0db 6
Yann 0:f30e2135b0db 7 /*
Yann 0:f30e2135b0db 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
Yann 0:f30e2135b0db 9 * All rights reserved.
Yann 0:f30e2135b0db 10 *
Yann 0:f30e2135b0db 11 * Redistribution and use in source and binary forms, with or without modification,
Yann 0:f30e2135b0db 12 * are permitted provided that the following conditions are met:
Yann 0:f30e2135b0db 13 *
Yann 0:f30e2135b0db 14 * 1. Redistributions of source code must retain the above copyright notice,
Yann 0:f30e2135b0db 15 * this list of conditions and the following disclaimer.
Yann 0:f30e2135b0db 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
Yann 0:f30e2135b0db 17 * this list of conditions and the following disclaimer in the documentation
Yann 0:f30e2135b0db 18 * and/or other materials provided with the distribution.
Yann 0:f30e2135b0db 19 * 3. The name of the author may not be used to endorse or promote products
Yann 0:f30e2135b0db 20 * derived from this software without specific prior written permission.
Yann 0:f30e2135b0db 21 *
Yann 0:f30e2135b0db 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
Yann 0:f30e2135b0db 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
Yann 0:f30e2135b0db 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
Yann 0:f30e2135b0db 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Yann 0:f30e2135b0db 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
Yann 0:f30e2135b0db 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Yann 0:f30e2135b0db 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Yann 0:f30e2135b0db 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
Yann 0:f30e2135b0db 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
Yann 0:f30e2135b0db 31 * OF SUCH DAMAGE.
Yann 0:f30e2135b0db 32 *
Yann 0:f30e2135b0db 33 * This file is part of the lwIP TCP/IP stack.
Yann 0:f30e2135b0db 34 *
Yann 0:f30e2135b0db 35 * Author: Simon Goldschmidt
Yann 0:f30e2135b0db 36 *
Yann 0:f30e2135b0db 37 */
Yann 0:f30e2135b0db 38
Yann 0:f30e2135b0db 39 #include "lwip/opt.h"
Yann 0:f30e2135b0db 40 #include "lwip/def.h"
Yann 0:f30e2135b0db 41
Yann 0:f30e2135b0db 42 /**
Yann 0:f30e2135b0db 43 * These are reference implementations of the byte swapping functions.
Yann 0:f30e2135b0db 44 * Again with the aim of being simple, correct and fully portable.
Yann 0:f30e2135b0db 45 * Byte swapping is the second thing you would want to optimize. You will
Yann 0:f30e2135b0db 46 * need to port it to your architecture and in your cc.h:
Yann 0:f30e2135b0db 47 *
Yann 0:f30e2135b0db 48 * #define LWIP_PLATFORM_BYTESWAP 1
Yann 0:f30e2135b0db 49 * #define LWIP_PLATFORM_HTONS(x) <your_htons>
Yann 0:f30e2135b0db 50 * #define LWIP_PLATFORM_HTONL(x) <your_htonl>
Yann 0:f30e2135b0db 51 *
Yann 0:f30e2135b0db 52 * Note ntohs() and ntohl() are merely references to the htonx counterparts.
Yann 0:f30e2135b0db 53 */
Yann 0:f30e2135b0db 54
Yann 0:f30e2135b0db 55 #if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
Yann 0:f30e2135b0db 56
Yann 0:f30e2135b0db 57 /**
Yann 0:f30e2135b0db 58 * Convert an u16_t from host- to network byte order.
Yann 0:f30e2135b0db 59 *
Yann 0:f30e2135b0db 60 * @param n u16_t in host byte order
Yann 0:f30e2135b0db 61 * @return n in network byte order
Yann 0:f30e2135b0db 62 */
Yann 0:f30e2135b0db 63 u16_t
Yann 0:f30e2135b0db 64 lwip_htons(u16_t n)
Yann 0:f30e2135b0db 65 {
Yann 0:f30e2135b0db 66 return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
Yann 0:f30e2135b0db 67 }
Yann 0:f30e2135b0db 68
Yann 0:f30e2135b0db 69 /**
Yann 0:f30e2135b0db 70 * Convert an u16_t from network- to host byte order.
Yann 0:f30e2135b0db 71 *
Yann 0:f30e2135b0db 72 * @param n u16_t in network byte order
Yann 0:f30e2135b0db 73 * @return n in host byte order
Yann 0:f30e2135b0db 74 */
Yann 0:f30e2135b0db 75 u16_t
Yann 0:f30e2135b0db 76 lwip_ntohs(u16_t n)
Yann 0:f30e2135b0db 77 {
Yann 0:f30e2135b0db 78 return lwip_htons(n);
Yann 0:f30e2135b0db 79 }
Yann 0:f30e2135b0db 80
Yann 0:f30e2135b0db 81 /**
Yann 0:f30e2135b0db 82 * Convert an u32_t from host- to network byte order.
Yann 0:f30e2135b0db 83 *
Yann 0:f30e2135b0db 84 * @param n u32_t in host byte order
Yann 0:f30e2135b0db 85 * @return n in network byte order
Yann 0:f30e2135b0db 86 */
Yann 0:f30e2135b0db 87 u32_t
Yann 0:f30e2135b0db 88 lwip_htonl(u32_t n)
Yann 0:f30e2135b0db 89 {
Yann 0:f30e2135b0db 90 return ((n & 0xff) << 24) |
Yann 0:f30e2135b0db 91 ((n & 0xff00) << 8) |
Yann 0:f30e2135b0db 92 ((n & 0xff0000UL) >> 8) |
Yann 0:f30e2135b0db 93 ((n & 0xff000000UL) >> 24);
Yann 0:f30e2135b0db 94 }
Yann 0:f30e2135b0db 95
Yann 0:f30e2135b0db 96 /**
Yann 0:f30e2135b0db 97 * Convert an u32_t from network- to host byte order.
Yann 0:f30e2135b0db 98 *
Yann 0:f30e2135b0db 99 * @param n u32_t in network byte order
Yann 0:f30e2135b0db 100 * @return n in host byte order
Yann 0:f30e2135b0db 101 */
Yann 0:f30e2135b0db 102 u32_t
Yann 0:f30e2135b0db 103 lwip_ntohl(u32_t n)
Yann 0:f30e2135b0db 104 {
Yann 0:f30e2135b0db 105 return lwip_htonl(n);
Yann 0:f30e2135b0db 106 }
Yann 0:f30e2135b0db 107
Yann 0:f30e2135b0db 108 #endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */