ReactOS  0.4.13-dev-1181-gb6654c0
def.h
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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
40 extern "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 */
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 
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
#define lwip_ntohl(x)
Definition: def.h:87
#define lwip_ntohs(x)
Definition: def.h:85
unsigned long u32_t
Definition: cc.h:25
#define lwip_htons(x)
Definition: def.h:84
#define lwip_htonl(x)
Definition: def.h:86
unsigned short u16_t
Definition: cc.h:24