Donatien Garnier / LwIPNetworking

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Dependencies:   DebugLib Socket lwip lwip-sys

Dependents:   EthernetInterface

Fork of NetworkingCoreLib by Donatien Garnier

main/lwip/src/include/lwip/def.h@0:013f5d54248c, 2012-05-24 (annotated)

Committer:
donatien
Date:
Thu May 24 14:49:40 2012 +0000
Revision:
0:013f5d54248c
Initial Commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:013f5d54248c 1 /*
donatien 0:013f5d54248c 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:013f5d54248c 3 * All rights reserved.
donatien 0:013f5d54248c 4 *
donatien 0:013f5d54248c 5 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:013f5d54248c 6 * are permitted provided that the following conditions are met:
donatien 0:013f5d54248c 7 *
donatien 0:013f5d54248c 8 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:013f5d54248c 9 * this list of conditions and the following disclaimer.
donatien 0:013f5d54248c 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:013f5d54248c 11 * this list of conditions and the following disclaimer in the documentation
donatien 0:013f5d54248c 12 * and/or other materials provided with the distribution.
donatien 0:013f5d54248c 13 * 3. The name of the author may not be used to endorse or promote products
donatien 0:013f5d54248c 14 * derived from this software without specific prior written permission.
donatien 0:013f5d54248c 15 *
donatien 0:013f5d54248c 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:013f5d54248c 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:013f5d54248c 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:013f5d54248c 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:013f5d54248c 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:013f5d54248c 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:013f5d54248c 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:013f5d54248c 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:013f5d54248c 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:013f5d54248c 25 * OF SUCH DAMAGE.
donatien 0:013f5d54248c 26 *
donatien 0:013f5d54248c 27 * This file is part of the lwIP TCP/IP stack.
donatien 0:013f5d54248c 28 *
donatien 0:013f5d54248c 29 * Author: Adam Dunkels <adam@sics.se>
donatien 0:013f5d54248c 30 *
donatien 0:013f5d54248c 31 */
donatien 0:013f5d54248c 32 #ifndef __LWIP_DEF_H__
donatien 0:013f5d54248c 33 #define __LWIP_DEF_H__
donatien 0:013f5d54248c 34
donatien 0:013f5d54248c 35 /* arch.h might define NULL already */
donatien 0:013f5d54248c 36 #include "lwip/arch.h"
donatien 0:013f5d54248c 37 #include "lwip/opt.h"
donatien 0:013f5d54248c 38
donatien 0:013f5d54248c 39 #ifdef __cplusplus
donatien 0:013f5d54248c 40 extern "C" {
donatien 0:013f5d54248c 41 #endif
donatien 0:013f5d54248c 42
donatien 0:013f5d54248c 43 #define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y))
donatien 0:013f5d54248c 44 #define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y))
donatien 0:013f5d54248c 45
donatien 0:013f5d54248c 46 #ifndef NULL
donatien 0:013f5d54248c 47 #define NULL ((void *)0)
donatien 0:013f5d54248c 48 #endif
donatien 0:013f5d54248c 49
donatien 0:013f5d54248c 50 /** Get the absolute difference between 2 u32_t values (correcting overflows)
donatien 0:013f5d54248c 51 * 'a' is expected to be 'higher' (without overflow) than 'b'. */
donatien 0:013f5d54248c 52 #define LWIP_U32_DIFF(a, b) (((a) >= (b)) ? ((a) - (b)) : (((a) + ((b) ^ 0xFFFFFFFF) + 1)))
donatien 0:013f5d54248c 53
donatien 0:013f5d54248c 54 /* Endianess-optimized shifting of two u8_t to create one u16_t */
donatien 0:013f5d54248c 55 #if BYTE_ORDER == LITTLE_ENDIAN
donatien 0:013f5d54248c 56 #define LWIP_MAKE_U16(a, b) ((a << 8) | b)
donatien 0:013f5d54248c 57 #else
donatien 0:013f5d54248c 58 #define LWIP_MAKE_U16(a, b) ((b << 8) | a)
donatien 0:013f5d54248c 59 #endif
donatien 0:013f5d54248c 60
donatien 0:013f5d54248c 61 #ifndef LWIP_PLATFORM_BYTESWAP
donatien 0:013f5d54248c 62 #define LWIP_PLATFORM_BYTESWAP 0
donatien 0:013f5d54248c 63 #endif
donatien 0:013f5d54248c 64
donatien 0:013f5d54248c 65 #ifndef LWIP_PREFIX_BYTEORDER_FUNCS
donatien 0:013f5d54248c 66 /* workaround for naming collisions on some platforms */
donatien 0:013f5d54248c 67
donatien 0:013f5d54248c 68 #ifdef htons
donatien 0:013f5d54248c 69 #undef htons
donatien 0:013f5d54248c 70 #endif /* htons */
donatien 0:013f5d54248c 71 #ifdef htonl
donatien 0:013f5d54248c 72 #undef htonl
donatien 0:013f5d54248c 73 #endif /* htonl */
donatien 0:013f5d54248c 74 #ifdef ntohs
donatien 0:013f5d54248c 75 #undef ntohs
donatien 0:013f5d54248c 76 #endif /* ntohs */
donatien 0:013f5d54248c 77 #ifdef ntohl
donatien 0:013f5d54248c 78 #undef ntohl
donatien 0:013f5d54248c 79 #endif /* ntohl */
donatien 0:013f5d54248c 80
donatien 0:013f5d54248c 81 #define htons(x) lwip_htons(x)
donatien 0:013f5d54248c 82 #define ntohs(x) lwip_ntohs(x)
donatien 0:013f5d54248c 83 #define htonl(x) lwip_htonl(x)
donatien 0:013f5d54248c 84 #define ntohl(x) lwip_ntohl(x)
donatien 0:013f5d54248c 85 #endif /* LWIP_PREFIX_BYTEORDER_FUNCS */
donatien 0:013f5d54248c 86
donatien 0:013f5d54248c 87 #if BYTE_ORDER == BIG_ENDIAN
donatien 0:013f5d54248c 88 #define lwip_htons(x) (x)
donatien 0:013f5d54248c 89 #define lwip_ntohs(x) (x)
donatien 0:013f5d54248c 90 #define lwip_htonl(x) (x)
donatien 0:013f5d54248c 91 #define lwip_ntohl(x) (x)
donatien 0:013f5d54248c 92 #define PP_HTONS(x) (x)
donatien 0:013f5d54248c 93 #define PP_NTOHS(x) (x)
donatien 0:013f5d54248c 94 #define PP_HTONL(x) (x)
donatien 0:013f5d54248c 95 #define PP_NTOHL(x) (x)
donatien 0:013f5d54248c 96 #else /* BYTE_ORDER != BIG_ENDIAN */
donatien 0:013f5d54248c 97 #if LWIP_PLATFORM_BYTESWAP
donatien 0:013f5d54248c 98 #define lwip_htons(x) LWIP_PLATFORM_HTONS(x)
donatien 0:013f5d54248c 99 #define lwip_ntohs(x) LWIP_PLATFORM_HTONS(x)
donatien 0:013f5d54248c 100 #define lwip_htonl(x) LWIP_PLATFORM_HTONL(x)
donatien 0:013f5d54248c 101 #define lwip_ntohl(x) LWIP_PLATFORM_HTONL(x)
donatien 0:013f5d54248c 102 #else /* LWIP_PLATFORM_BYTESWAP */
donatien 0:013f5d54248c 103 u16_t lwip_htons(u16_t x);
donatien 0:013f5d54248c 104 u16_t lwip_ntohs(u16_t x);
donatien 0:013f5d54248c 105 u32_t lwip_htonl(u32_t x);
donatien 0:013f5d54248c 106 u32_t lwip_ntohl(u32_t x);
donatien 0:013f5d54248c 107 #endif /* LWIP_PLATFORM_BYTESWAP */
donatien 0:013f5d54248c 108
donatien 0:013f5d54248c 109 /* These macros should be calculated by the preprocessor and are used
donatien 0:013f5d54248c 110 with compile-time constants only (so that there is no little-endian
donatien 0:013f5d54248c 111 overhead at runtime). */
donatien 0:013f5d54248c 112 #define PP_HTONS(x) ((((x) & 0xff) << 8) | (((x) & 0xff00) >> 8))
donatien 0:013f5d54248c 113 #define PP_NTOHS(x) PP_HTONS(x)
donatien 0:013f5d54248c 114 #define PP_HTONL(x) ((((x) & 0xff) << 24) | \
donatien 0:013f5d54248c 115 (((x) & 0xff00) << 8) | \
donatien 0:013f5d54248c 116 (((x) & 0xff0000UL) >> 8) | \
donatien 0:013f5d54248c 117 (((x) & 0xff000000UL) >> 24))
donatien 0:013f5d54248c 118 #define PP_NTOHL(x) PP_HTONL(x)
donatien 0:013f5d54248c 119
donatien 0:013f5d54248c 120 #endif /* BYTE_ORDER == BIG_ENDIAN */
donatien 0:013f5d54248c 121
donatien 0:013f5d54248c 122 #ifdef __cplusplus
donatien 0:013f5d54248c 123 }
donatien 0:013f5d54248c 124 #endif
donatien 0:013f5d54248c 125
donatien 0:013f5d54248c 126 #endif /* __LWIP_DEF_H__ */
donatien 0:013f5d54248c 127