source: UsbWattMeter/trunk/lwip-1.4.1/src/include/lwip/def.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-chdr
File size: 3.8 KB
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1/*
2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32#ifndef __LWIP_DEF_H__
33#define __LWIP_DEF_H__
34
35/* arch.h might define NULL already */
36#include "lwip/arch.h"
37#include "lwip/opt.h"
38
39#ifdef __cplusplus
40extern "C" {
41#endif
42
43#define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y))
44#define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y))
45
46#ifndef NULL
47#define NULL ((void *)0)
48#endif
49
50/* Endianess-optimized shifting of two u8_t to create one u16_t */
51#if BYTE_ORDER == LITTLE_ENDIAN
52#define LWIP_MAKE_U16(a, b) ((a << 8) | b)
53#else
54#define LWIP_MAKE_U16(a, b) ((b << 8) | a)
55#endif
56
57#ifndef LWIP_PLATFORM_BYTESWAP
58#define LWIP_PLATFORM_BYTESWAP 0
59#endif
60
61#ifndef LWIP_PREFIX_BYTEORDER_FUNCS
62/* workaround for naming collisions on some platforms */
63
64#ifdef htons
65#undef htons
66#endif /* htons */
67#ifdef htonl
68#undef htonl
69#endif /* htonl */
70#ifdef ntohs
71#undef ntohs
72#endif /* ntohs */
73#ifdef ntohl
74#undef ntohl
75#endif /* ntohl */
76
77#define htons(x) lwip_htons(x)
78#define ntohs(x) lwip_ntohs(x)
79#define htonl(x) lwip_htonl(x)
80#define ntohl(x) lwip_ntohl(x)
81#endif /* LWIP_PREFIX_BYTEORDER_FUNCS */
82
83#if BYTE_ORDER == BIG_ENDIAN
84#define lwip_htons(x) (x)
85#define lwip_ntohs(x) (x)
86#define lwip_htonl(x) (x)
87#define lwip_ntohl(x) (x)
88#define PP_HTONS(x) (x)
89#define PP_NTOHS(x) (x)
90#define PP_HTONL(x) (x)
91#define PP_NTOHL(x) (x)
92#else /* BYTE_ORDER != BIG_ENDIAN */
93#if LWIP_PLATFORM_BYTESWAP
94#define lwip_htons(x) LWIP_PLATFORM_HTONS(x)
95#define lwip_ntohs(x) LWIP_PLATFORM_HTONS(x)
96#define lwip_htonl(x) LWIP_PLATFORM_HTONL(x)
97#define lwip_ntohl(x) LWIP_PLATFORM_HTONL(x)
98#else /* LWIP_PLATFORM_BYTESWAP */
99u16_t lwip_htons(u16_t x);
100u16_t lwip_ntohs(u16_t x);
101u32_t lwip_htonl(u32_t x);
102u32_t lwip_ntohl(u32_t x);
103#endif /* LWIP_PLATFORM_BYTESWAP */
104
105/* These macros should be calculated by the preprocessor and are used
106 with compile-time constants only (so that there is no little-endian
107 overhead at runtime). */
108#define PP_HTONS(x) ((((x) & 0xff) << 8) | (((x) & 0xff00) >> 8))
109#define PP_NTOHS(x) PP_HTONS(x)
110#define PP_HTONL(x) ((((x) & 0xff) << 24) | \
111 (((x) & 0xff00) << 8) | \
112 (((x) & 0xff0000UL) >> 8) | \
113 (((x) & 0xff000000UL) >> 24))
114#define PP_NTOHL(x) PP_HTONL(x)
115
116#endif /* BYTE_ORDER == BIG_ENDIAN */
117
118#ifdef __cplusplus
119}
120#endif
121
122#endif /* __LWIP_DEF_H__ */
123
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