1 /* 2 * Copyright (c) 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the Computer Systems 16 * Engineering Group at Lawrence Berkeley Laboratory. 17 * 4. Neither the name of the University nor of the Laboratory may be used 18 * to endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef portability_h 35 #define portability_h 36 37 /* 38 * Helpers for portability between Windows and UN*X and between different 39 * flavors of UN*X. 40 */ 41 #include <stdarg.h> /* we declare varargs functions on some platforms */ 42 43 /* Take the OS definitions early for timeradd and others so that the guards 44 * below have an effect. 45 */ 46 #ifndef _WIN32 47 #include <sys/time.h> 48 #endif 49 50 #include "pcap/funcattrs.h" 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 #ifdef HAVE_STRLCAT 57 #define pcap_strlcat strlcat 58 #else 59 #if defined(_MSC_VER) || defined(__MINGW32__) 60 /* 61 * strncat_s() is supported at least back to Visual 62 * Studio 2005; we require Visual Studio 2015 or later. 63 */ 64 #define pcap_strlcat(x, y, z) \ 65 strncat_s((x), (z), (y), _TRUNCATE) 66 #else 67 /* 68 * Define it ourselves. 69 */ 70 extern size_t pcap_strlcat(char * restrict dst, const char * restrict src, size_t dstsize); 71 #endif 72 #endif 73 74 #ifdef HAVE_STRLCPY 75 #define pcap_strlcpy strlcpy 76 #else 77 #if defined(_MSC_VER) || defined(__MINGW32__) 78 /* 79 * strncpy_s() is supported at least back to Visual 80 * Studio 2005; we require Visual Studio 2015 or later. 81 */ 82 #define pcap_strlcpy(x, y, z) \ 83 strncpy_s((x), (z), (y), _TRUNCATE) 84 #else 85 /* 86 * Define it ourselves. 87 */ 88 extern size_t pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dstsize); 89 #endif 90 #endif 91 92 #ifdef _MSC_VER 93 /* 94 * If <crtdbg.h> has been included, and _DEBUG is defined, and 95 * __STDC__ is zero, <crtdbg.h> will define strdup() to call 96 * _strdup_dbg(). So if it's already defined, don't redefine 97 * it. 98 */ 99 #ifndef strdup 100 #define strdup _strdup 101 #endif 102 #endif 103 104 /* 105 * We want asprintf(), for some cases where we use it to construct 106 * dynamically-allocated variable-length strings; it's present on 107 * some, but not all, platforms. 108 */ 109 #ifdef HAVE_ASPRINTF 110 #define pcap_asprintf asprintf 111 #else 112 extern int pcap_asprintf(char **, PCAP_FORMAT_STRING(const char *), ...) 113 PCAP_PRINTFLIKE(2, 3); 114 #endif 115 116 #ifdef HAVE_VASPRINTF 117 #define pcap_vasprintf vasprintf 118 #else 119 extern int pcap_vasprintf(char **, const char *, va_list ap); 120 #endif 121 122 /* For Solaris before 11. */ 123 #ifndef timeradd 124 #define timeradd(a, b, result) \ 125 do { \ 126 (result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \ 127 (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \ 128 if ((result)->tv_usec >= 1000000) { \ 129 ++(result)->tv_sec; \ 130 (result)->tv_usec -= 1000000; \ 131 } \ 132 } while (0) 133 #endif /* timeradd */ 134 #ifndef timersub 135 #define timersub(a, b, result) \ 136 do { \ 137 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ 138 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ 139 if ((result)->tv_usec < 0) { \ 140 --(result)->tv_sec; \ 141 (result)->tv_usec += 1000000; \ 142 } \ 143 } while (0) 144 #endif /* timersub */ 145 146 #ifdef HAVE_STRTOK_R 147 #define pcap_strtok_r strtok_r 148 #else 149 #ifdef _WIN32 150 /* 151 * Microsoft gives it a different name. 152 */ 153 #define pcap_strtok_r strtok_s 154 #else 155 /* 156 * Define it ourselves. 157 */ 158 extern char *pcap_strtok_r(char *, const char *, char **); 159 #endif 160 #endif /* HAVE_STRTOK_R */ 161 162 #ifdef _WIN32 163 #if !defined(__cplusplus) 164 #define inline __inline 165 #endif 166 #endif /* _WIN32 */ 167 168 #ifdef __cplusplus 169 } 170 #endif 171 172 #endif 173