BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file |
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3 | * various utility macros |
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4 | */ |
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5 | |||
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 | #ifndef LWIP_HDR_DEF_H |
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38 | #define LWIP_HDR_DEF_H |
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39 | |||
40 | /* arch.h might define NULL already */ |
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41 | #include "lwip/arch.h" |
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42 | #include "lwip/opt.h" |
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43 | #if LWIP_PERF |
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44 | #include "arch/perf.h" |
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45 | #else /* LWIP_PERF */ |
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46 | #define PERF_START /* null definition */ |
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47 | #define PERF_STOP(x) /* null definition */ |
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48 | #endif /* LWIP_PERF */ |
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49 | |||
50 | #ifdef __cplusplus |
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51 | extern "C" { |
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52 | #endif |
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53 | |||
54 | #define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y)) |
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55 | #define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y)) |
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56 | |||
57 | /* Get the number of entries in an array ('x' must NOT be a pointer!) */ |
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58 | #define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0])) |
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59 | |||
60 | /** Create u32_t value from bytes */ |
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61 | #define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \ |
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62 | ((u32_t)((b) & 0xff) << 16) | \ |
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63 | ((u32_t)((c) & 0xff) << 8) | \ |
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64 | (u32_t)((d) & 0xff)) |
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65 | |||
66 | #ifndef NULL |
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67 | #ifdef __cplusplus |
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68 | #define NULL 0 |
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69 | #else |
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70 | #define NULL ((void *)0) |
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71 | #endif |
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72 | #endif |
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73 | |||
74 | #if BYTE_ORDER == BIG_ENDIAN |
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75 | #define lwip_htons(x) (x) |
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76 | #define lwip_ntohs(x) (x) |
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77 | #define lwip_htonl(x) (x) |
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78 | #define lwip_ntohl(x) (x) |
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79 | #define PP_HTONS(x) (x) |
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80 | #define PP_NTOHS(x) (x) |
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81 | #define PP_HTONL(x) (x) |
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82 | #define PP_NTOHL(x) (x) |
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83 | #else /* BYTE_ORDER != BIG_ENDIAN */ |
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84 | #ifndef lwip_htons |
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85 | u16_t lwip_htons(u16_t x); |
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86 | #endif |
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87 | #define lwip_ntohs(x) lwip_htons(x) |
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88 | |||
89 | #ifndef lwip_htonl |
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90 | u32_t lwip_htonl(u32_t x); |
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91 | #endif |
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92 | #define lwip_ntohl(x) lwip_htonl(x) |
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93 | |||
94 | /* These macros should be calculated by the preprocessor and are used |
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95 | with compile-time constants only (so that there is no little-endian |
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96 | overhead at runtime). */ |
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97 | #define PP_HTONS(x) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8))) |
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98 | #define PP_NTOHS(x) PP_HTONS(x) |
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99 | #define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \ |
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100 | (((x) & (u32_t)0x0000ff00UL) << 8) | \ |
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101 | (((x) & (u32_t)0x00ff0000UL) >> 8) | \ |
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102 | (((x) & (u32_t)0xff000000UL) >> 24)) |
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103 | #define PP_NTOHL(x) PP_HTONL(x) |
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104 | #endif /* BYTE_ORDER == BIG_ENDIAN */ |
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105 | |||
106 | /* Provide usual function names as macros for users, but this can be turned off */ |
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107 | #ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS |
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108 | #define htons(x) lwip_htons(x) |
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109 | #define ntohs(x) lwip_ntohs(x) |
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110 | #define htonl(x) lwip_htonl(x) |
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111 | #define ntohl(x) lwip_ntohl(x) |
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112 | #endif |
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113 | |||
114 | /* Functions that are not available as standard implementations. |
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115 | * In cc.h, you can #define these to implementations available on |
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116 | * your platform to save some code bytes if you use these functions |
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117 | * in your application, too. |
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118 | */ |
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119 | |||
120 | #ifndef lwip_itoa |
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121 | /* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */ |
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122 | void lwip_itoa(char* result, size_t bufsize, int number); |
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123 | #endif |
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124 | #ifndef lwip_strnicmp |
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125 | /* This can be #defined to strnicmp() or strncasecmp() depending on your platform */ |
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126 | int lwip_strnicmp(const char* str1, const char* str2, size_t len); |
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127 | #endif |
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128 | #ifndef lwip_stricmp |
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129 | /* This can be #defined to stricmp() or strcasecmp() depending on your platform */ |
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130 | int lwip_stricmp(const char* str1, const char* str2); |
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131 | #endif |
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132 | #ifndef lwip_strnstr |
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133 | /* This can be #defined to strnstr() depending on your platform */ |
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134 | char* lwip_strnstr(const char* buffer, const char* token, size_t n); |
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135 | #endif |
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136 | |||
137 | #ifdef __cplusplus |
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138 | } |
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139 | #endif |
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140 | |||
141 | #endif /* LWIP_HDR_DEF_H */ |