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/** | ||
* @file | ||
* various utility macros | ||
*/ | ||
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/* | ||
* Copyright (c) 2001-2004 Swedish Institute of Computer Science. | ||
* All rights reserved. | ||
* | ||
* Redistribution and use in source and binary forms, with or without modification, | ||
* are permitted provided that the following conditions are met: | ||
* | ||
* 1. Redistributions of source code must retain the above copyright notice, | ||
* this list of conditions and the following disclaimer. | ||
* 2. Redistributions in binary form must reproduce the above copyright notice, | ||
* this list of conditions and the following disclaimer in the documentation | ||
* and/or other materials provided with the distribution. | ||
* 3. The name of the author may not be used to endorse or promote products | ||
* derived from this software without specific prior written permission. | ||
* | ||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | ||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT | ||
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT | ||
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | ||
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY | ||
* OF SUCH DAMAGE. | ||
* | ||
* This file is part of the lwIP TCP/IP stack. | ||
* | ||
* Author: Adam Dunkels <adam@sics.se> | ||
* | ||
*/ | ||
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/** | ||
* @defgroup perf Performance measurement | ||
* @ingroup sys_layer | ||
* All defines related to this section must not be placed in lwipopts.h, | ||
* but in arch/perf.h! | ||
* Measurement calls made throughout lwip, these can be defined to nothing. | ||
* - PERF_START: start measuring something. | ||
* - PERF_STOP(x): stop measuring something, and record the result. | ||
*/ | ||
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#ifndef LWIP_HDR_DEF_H | ||
#define LWIP_HDR_DEF_H | ||
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/* arch.h might define NULL already */ | ||
#define PERF_START /* null definition */ | ||
#define PERF_STOP(x) /* null definition */ | ||
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#ifdef __cplusplus | ||
extern "C" { | ||
#endif | ||
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#define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y)) | ||
#define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y)) | ||
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/* Get the number of entries in an array ('x' must NOT be a pointer!) */ | ||
#define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0])) | ||
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/** Create uint32_t value from bytes */ | ||
#define LWIP_MAKEU32(a,b,c,d) (((uint32_t)((a) & 0xff) << 24) | \ | ||
((uint32_t)((b) & 0xff) << 16) | \ | ||
((uint32_t)((c) & 0xff) << 8) | \ | ||
(uint32_t)((d) & 0xff)) | ||
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#ifndef NULL | ||
#ifdef __cplusplus | ||
#define NULL 0 | ||
#else | ||
#define NULL ((void *)0) | ||
#endif | ||
#endif | ||
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#if BYTE_ORDER == BIG_ENDIAN | ||
#define lwip_htons(x) ((uint16_t)(x)) | ||
#define lwip_ntohs(x) ((uint16_t)(x)) | ||
#define lwip_htonl(x) ((uint32_t)(x)) | ||
#define lwip_ntohl(x) ((uint32_t)(x)) | ||
#define PP_HTONS(x) ((uint16_t)(x)) | ||
#define PP_NTOHS(x) ((uint16_t)(x)) | ||
#define PP_HTONL(x) ((uint32_t)(x)) | ||
#define PP_NTOHL(x) ((uint32_t)(x)) | ||
#else /* BYTE_ORDER != BIG_ENDIAN */ | ||
#ifndef lwip_htons | ||
uint16_t lwip_htons(uint16_t x); | ||
#endif | ||
#define lwip_ntohs(x) lwip_htons(x) | ||
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#ifndef lwip_htonl | ||
uint32_t lwip_htonl(uint32_t x); | ||
#endif | ||
#define lwip_ntohl(x) lwip_htonl(x) | ||
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/* These macros should be calculated by the preprocessor and are used | ||
with compile-time constants only (so that there is no little-endian | ||
overhead at runtime). */ | ||
#define PP_HTONS(x) ((uint16_t)((((x) & (uint16_t)0x00ffU) << 8) | (((x) & (uint16_t)0xff00U) >> 8))) | ||
#define PP_NTOHS(x) PP_HTONS(x) | ||
#define PP_HTONL(x) ((((x) & (uint32_t)0x000000ffUL) << 24) | \ | ||
(((x) & (uint32_t)0x0000ff00UL) << 8) | \ | ||
(((x) & (uint32_t)0x00ff0000UL) >> 8) | \ | ||
(((x) & (uint32_t)0xff000000UL) >> 24)) | ||
#define PP_NTOHL(x) PP_HTONL(x) | ||
#endif /* BYTE_ORDER == BIG_ENDIAN */ | ||
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/* Functions that are not available as standard implementations. | ||
* In cc.h, you can #define these to implementations available on | ||
* your platform to save some code bytes if you use these functions | ||
* in your application, too. | ||
*/ | ||
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#ifndef lwip_itoa | ||
/* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */ | ||
void lwip_itoa(char* result, size_t bufsize, int number); | ||
#endif | ||
#ifndef lwip_strnicmp | ||
/* This can be #defined to strnicmp() or strncasecmp() depending on your platform */ | ||
int lwip_strnicmp(const char* str1, const char* str2, size_t len); | ||
#endif | ||
#ifndef lwip_stricmp | ||
/* This can be #defined to stricmp() or strcasecmp() depending on your platform */ | ||
int lwip_stricmp(const char* str1, const char* str2); | ||
#endif | ||
#ifndef lwip_strnstr | ||
/* This can be #defined to strnstr() depending on your platform */ | ||
char* lwip_strnstr(const char* buffer, const char* token, size_t n); | ||
#endif | ||
#ifndef lwip_strnistr | ||
/* This can be #defined to strnistr() depending on your platform */ | ||
char* lwip_strnistr(const char* buffer, const char* token, size_t n); | ||
#endif | ||
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#ifdef __cplusplus | ||
} | ||
#endif | ||
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#endif /* LWIP_HDR_DEF_H */ |
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