[457] | 1 | /**
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| 2 | * @file
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| 3 | * various utility macros
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without modification,
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| 11 | * are permitted provided that the following conditions are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. The name of the author may not be used to endorse or promote products
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| 19 | * derived from this software without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 30 | * OF SUCH DAMAGE.
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| 31 | *
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| 32 | * This file is part of the lwIP TCP/IP stack.
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| 33 | *
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| 34 | * Author: Adam Dunkels <adam@sics.se>
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| 35 | *
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| 36 | */
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| 37 |
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| 38 | /**
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| 39 | * @defgroup perf Performance measurement
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| 40 | * @ingroup sys_layer
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| 41 | * All defines related to this section must not be placed in lwipopts.h,
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| 42 | * but in arch/perf.h!
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| 43 | * Measurement calls made throughout lwip, these can be defined to nothing.
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| 44 | * - PERF_START: start measuring something.
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| 45 | * - PERF_STOP(x): stop measuring something, and record the result.
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| 46 | */
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| 47 |
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| 48 | #ifndef LWIP_HDR_DEF_H
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| 49 | #define LWIP_HDR_DEF_H
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| 50 |
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| 51 | /* arch.h might define NULL already */
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| 52 | #include "lwip/arch.h"
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| 53 | #include "lwip/opt.h"
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| 54 | #if LWIP_PERF
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| 55 | #include "arch/perf.h"
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| 56 | #else /* LWIP_PERF */
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| 57 | #define PERF_START /* null definition */
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| 58 | #define PERF_STOP(x) /* null definition */
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| 59 | #endif /* LWIP_PERF */
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| 60 |
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| 61 | #ifdef __cplusplus
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| 62 | extern "C" {
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| 63 | #endif
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| 64 |
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| 65 | #define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y))
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| 66 | #define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y))
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| 67 |
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| 68 | /* Get the number of entries in an array ('x' must NOT be a pointer!) */
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| 69 | #define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0]))
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| 70 |
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| 71 | /** Create u32_t value from bytes */
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| 72 | #define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \
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| 73 | ((u32_t)((b) & 0xff) << 16) | \
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| 74 | ((u32_t)((c) & 0xff) << 8) | \
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| 75 | (u32_t)((d) & 0xff))
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| 76 |
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| 77 | #ifndef NULL
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| 78 | #ifdef __cplusplus
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| 79 | #define NULL 0
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| 80 | #else
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| 81 | #define NULL ((void *)0)
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| 82 | #endif
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| 83 | #endif
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| 84 |
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| 85 | #if BYTE_ORDER == BIG_ENDIAN
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| 86 | #define lwip_htons(x) ((u16_t)(x))
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| 87 | #define lwip_ntohs(x) ((u16_t)(x))
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| 88 | #define lwip_htonl(x) ((u32_t)(x))
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| 89 | #define lwip_ntohl(x) ((u32_t)(x))
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| 90 | #define PP_HTONS(x) ((u16_t)(x))
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| 91 | #define PP_NTOHS(x) ((u16_t)(x))
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| 92 | #define PP_HTONL(x) ((u32_t)(x))
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| 93 | #define PP_NTOHL(x) ((u32_t)(x))
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| 94 | #else /* BYTE_ORDER != BIG_ENDIAN */
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| 95 | #ifndef lwip_htons
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| 96 | u16_t lwip_htons(u16_t x);
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| 97 | #endif
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| 98 | #define lwip_ntohs(x) lwip_htons(x)
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| 99 |
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| 100 | #ifndef lwip_htonl
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| 101 | u32_t lwip_htonl(u32_t x);
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| 102 | #endif
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| 103 | #define lwip_ntohl(x) lwip_htonl(x)
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| 104 |
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| 105 | /* These macros should be calculated by the preprocessor and are used
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| 106 | with compile-time constants only (so that there is no little-endian
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| 107 | overhead at runtime). */
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| 108 | #define PP_HTONS(x) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8)))
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| 109 | #define PP_NTOHS(x) PP_HTONS(x)
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| 110 | #define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \
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| 111 | (((x) & (u32_t)0x0000ff00UL) << 8) | \
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| 112 | (((x) & (u32_t)0x00ff0000UL) >> 8) | \
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| 113 | (((x) & (u32_t)0xff000000UL) >> 24))
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| 114 | #define PP_NTOHL(x) PP_HTONL(x)
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| 115 | #endif /* BYTE_ORDER == BIG_ENDIAN */
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| 116 |
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| 117 | /* Provide usual function names as macros for users, but this can be turned off */
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| 118 | #ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
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| 119 | #define htons(x) lwip_htons(x)
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| 120 | #define ntohs(x) lwip_ntohs(x)
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| 121 | #define htonl(x) lwip_htonl(x)
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| 122 | #define ntohl(x) lwip_ntohl(x)
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| 123 | #endif
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| 124 |
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| 125 | /* Functions that are not available as standard implementations.
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| 126 | * In cc.h, you can #define these to implementations available on
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| 127 | * your platform to save some code bytes if you use these functions
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| 128 | * in your application, too.
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| 129 | */
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| 130 |
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| 131 | #ifndef lwip_itoa
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| 132 | /* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */
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| 133 | void lwip_itoa(char* result, size_t bufsize, int number);
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| 134 | #endif
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| 135 | #ifndef lwip_strnicmp
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| 136 | /* This can be #defined to strnicmp() or strncasecmp() depending on your platform */
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| 137 | int lwip_strnicmp(const char* str1, const char* str2, size_t len);
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| 138 | #endif
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| 139 | #ifndef lwip_stricmp
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| 140 | /* This can be #defined to stricmp() or strcasecmp() depending on your platform */
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| 141 | int lwip_stricmp(const char* str1, const char* str2);
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| 142 | #endif
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| 143 | #ifndef lwip_strnstr
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| 144 | /* This can be #defined to strnstr() depending on your platform */
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| 145 | char* lwip_strnstr(const char* buffer, const char* token, size_t n);
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| 146 | #endif
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| 147 |
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| 148 | #ifdef __cplusplus
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| 149 | }
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| 150 | #endif
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| 151 |
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| 152 | #endif /* LWIP_HDR_DEF_H */
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