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 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 #ifndef HAVE_STRLCPY 47 /* 48 * Macro that does the same thing as strlcpy(). 49 */ 50 #ifdef _MSC_VER 51 /* 52 * strncpy_s() is supported at least back to Visual 53 * Studio 2005. 54 */ 55 #define strlcpy(x, y, z) \ 56 strncpy_s((x), (z), (y), _TRUNCATE) 57 58 #else 59 #define strlcpy(x, y, z) \ 60 (strncpy((x), (y), (z)), \ 61 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \ 62 (void) strlen((y))) 63 #endif 64 #endif 65 66 /* 67 * For flagging arguments as format strings in MSVC. 68 */ 69 #if _MSC_VER >= 1400 70 #include <sal.h> 71 #if _MSC_VER > 1400 72 #define FORMAT_STRING(p) _Printf_format_string_ p 73 #else 74 #define FORMAT_STRING(p) __format_string p 75 #endif 76 #else 77 #define FORMAT_STRING(p) p 78 #endif 79 80 #ifdef _MSC_VER 81 #define strdup _strdup 82 #define sscanf sscanf_s 83 #define setbuf(x, y) \ 84 setvbuf((x), (y), _IONBF, 0) 85 #define fopen(x, y) \ 86 fopen_safe((x), (y)) 87 FILE *fopen_safe(const char *filename, const char* mode); 88 #endif 89 90 #if defined(_MSC_VER) || defined(__MINGW32__) 91 #define strlcat(x, y, z) \ 92 strncat_s((x), (z), (y), _TRUNCATE) 93 #endif 94 95 #ifdef _MSC_VER 96 /* 97 * MSVC. 98 */ 99 #if _MSC_VER >= 1900 100 /* 101 * VS 2015 or newer; we have snprintf() function. 102 */ 103 #define HAVE_SNPRINTF 104 #endif 105 #endif 106 107 /* 108 * On Windows, snprintf(), with that name and with C99 behavior - i.e., 109 * guaranteeing that the formatted string is null-terminated - didn't 110 * appear until Visual Studio 2015. Prior to that, the C runtime had 111 * only _snprintf(), which *doesn't* guarantee that the string is 112 * null-terminated if it is truncated due to the buffer being too 113 * small. We therefore can't just define snprintf to be _snprintf 114 * and define vsnprintf to be _vsnprintf, as we're relying on null- 115 * termination of strings in all cases. 116 * 117 * We also want to allow this to be built with versions of Visual Studio 118 * prior to VS 2015, so we can't rely on snprintf() being present. 119 * 120 * And we want to make sure that, if we support plugins in the future, 121 * a routine with C99 snprintf() behavior will be available to them. 122 * We also don't want it to collide with the C library snprintf() if 123 * there is one. 124 * 125 * So we make pcap_snprintf() and pcap_vsnprintf() available, either by 126 * #defining them to be snprintf or vsnprintf, respectively, or by 127 * defining our own versions and exporting them. 128 */ 129 #ifdef HAVE_SNPRINTF 130 #define pcap_snprintf snprintf 131 #else 132 extern int pcap_snprintf(char *, size_t, FORMAT_STRING(const char *), ...) 133 #ifdef __ATTRIBUTE___FORMAT_OK 134 __attribute__((format (printf, 3, 4))) 135 #endif /* __ATTRIBUTE___FORMAT_OK */ 136 ; 137 #endif 138 139 #ifdef HAVE_VSNPRINTF 140 #define pcap_vsnprintf vsnprintf 141 #else 142 extern int pcap_vsnprintf(char *, size_t, const char *, va_list ap); 143 #endif 144 145 #ifdef HAVE_STRTOK_R 146 #define pcap_strtok_r strtok_r 147 #else 148 #ifdef _MSC_VER 149 /* 150 * Microsoft gives it a different name. 151 */ 152 #define pcap_strtok_r strtok_s 153 #else 154 /* 155 * Define it ourselves. 156 */ 157 #define NEED_STRTOK_R 158 extern int pcap_strtok_r(char *, const char *, char **); 159 #endif 160 #endif /* HAVE_STRTOK_R */ 161 162 #ifdef _WIN32 163 /* 164 * These may be defined by <inttypes.h>. 165 * 166 * XXX - for MSVC, we always want the _MSC_EXTENSIONS versions. 167 * What about other compilers? If, as the MinGW Web site says MinGW 168 * does, the other compilers just use Microsoft's run-time library, 169 * then they should probably use the _MSC_EXTENSIONS even if the 170 * compiler doesn't define _MSC_EXTENSIONS. 171 * 172 * XXX - we currently aren't using any of these, but this allows 173 * their use in the future. 174 */ 175 #ifndef PRId64 176 #ifdef _MSC_EXTENSIONS 177 #define PRId64 "I64d" 178 #else 179 #define PRId64 "lld" 180 #endif 181 #endif /* PRId64 */ 182 183 #ifndef PRIo64 184 #ifdef _MSC_EXTENSIONS 185 #define PRIo64 "I64o" 186 #else 187 #define PRIo64 "llo" 188 #endif 189 #endif /* PRIo64 */ 190 191 #ifndef PRIx64 192 #ifdef _MSC_EXTENSIONS 193 #define PRIx64 "I64x" 194 #else 195 #define PRIx64 "llx" 196 #endif 197 #endif 198 199 #ifndef PRIu64 200 #ifdef _MSC_EXTENSIONS 201 #define PRIu64 "I64u" 202 #else 203 #define PRIu64 "llu" 204 #endif 205 #endif 206 207 #if !defined(__cplusplus) 208 #define inline __inline 209 #endif 210 #endif /* _WIN32 */ 211 212 #ifdef __cplusplus 213 } 214 #endif 215 216 #endif 217
