1 /* 2 * Copyright (c) 2007 Niels Provos <provos@citi.umich.edu> 3 * 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. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef _EVUTIL_H_ 28 #define _EVUTIL_H_ 29 30 /** @file evutil.h 31 32 Common convenience functions for cross-platform portability and 33 related socket manipulations. 34 35 */ 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 #include "event-config.h" 42 #ifdef _EVENT_HAVE_SYS_TIME_H 43 #include <sys/time.h> 44 #endif 45 #ifdef _EVENT_HAVE_STDINT_H 46 #include <stdint.h> 47 #elif defined(_EVENT_HAVE_INTTYPES_H) 48 #include <inttypes.h> 49 #endif 50 #ifdef _EVENT_HAVE_SYS_TYPES_H 51 #include <sys/types.h> 52 #endif 53 #include <stdarg.h> 54 55 #ifdef _EVENT_HAVE_UINT64_T 56 #define ev_uint64_t uint64_t 57 #define ev_int64_t int64_t 58 #elif defined(WIN32) 59 #define ev_uint64_t unsigned __int64 60 #define ev_int64_t signed __int64 61 #elif _EVENT_SIZEOF_LONG_LONG == 8 62 #define ev_uint64_t unsigned long long 63 #define ev_int64_t long long 64 #elif _EVENT_SIZEOF_LONG == 8 65 #define ev_uint64_t unsigned long 66 #define ev_int64_t long 67 #else 68 #error "No way to define ev_uint64_t" 69 #endif 70 71 #ifdef _EVENT_HAVE_UINT32_T 72 #define ev_uint32_t uint32_t 73 #elif defined(WIN32) 74 #define ev_uint32_t unsigned int 75 #elif _EVENT_SIZEOF_LONG == 4 76 #define ev_uint32_t unsigned long 77 #elif _EVENT_SIZEOF_INT == 4 78 #define ev_uint32_t unsigned int 79 #else 80 #error "No way to define ev_uint32_t" 81 #endif 82 83 #ifdef _EVENT_HAVE_UINT16_T 84 #define ev_uint16_t uint16_t 85 #elif defined(WIN32) 86 #define ev_uint16_t unsigned short 87 #elif _EVENT_SIZEOF_INT == 2 88 #define ev_uint16_t unsigned int 89 #elif _EVENT_SIZEOF_SHORT == 2 90 #define ev_uint16_t unsigned short 91 #else 92 #error "No way to define ev_uint16_t" 93 #endif 94 95 #ifdef _EVENT_HAVE_UINT8_T 96 #define ev_uint8_t uint8_t 97 #else 98 #define ev_uint8_t unsigned char 99 #endif 100 101 int evutil_socketpair(int d, int type, int protocol, int sv[2]); 102 int evutil_make_socket_nonblocking(int sock); 103 #ifdef WIN32 104 #define EVUTIL_CLOSESOCKET(s) closesocket(s) 105 #else 106 #define EVUTIL_CLOSESOCKET(s) close(s) 107 #endif 108 109 #ifdef WIN32 110 #define EVUTIL_SOCKET_ERROR() WSAGetLastError() 111 #define EVUTIL_SET_SOCKET_ERROR(errcode) \ 112 do { WSASetLastError(errcode); } while (0) 113 #else 114 #define EVUTIL_SOCKET_ERROR() (errno) 115 #define EVUTIL_SET_SOCKET_ERROR(errcode) \ 116 do { errno = (errcode); } while (0) 117 #endif 118 119 /* 120 * Manipulation functions for struct timeval 121 */ 122 #ifdef _EVENT_HAVE_TIMERADD 123 #define evutil_timeradd(tvp, uvp, vvp) timeradd((tvp), (uvp), (vvp)) 124 #define evutil_timersub(tvp, uvp, vvp) timersub((tvp), (uvp), (vvp)) 125 #else 126 #define evutil_timeradd(tvp, uvp, vvp) \ 127 do { \ 128 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 129 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 130 if ((vvp)->tv_usec >= 1000000) { \ 131 (vvp)->tv_sec++; \ 132 (vvp)->tv_usec -= 1000000; \ 133 } \ 134 } while (0) 135 #define evutil_timersub(tvp, uvp, vvp) \ 136 do { \ 137 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 138 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 139 if ((vvp)->tv_usec < 0) { \ 140 (vvp)->tv_sec--; \ 141 (vvp)->tv_usec += 1000000; \ 142 } \ 143 } while (0) 144 #endif /* !_EVENT_HAVE_HAVE_TIMERADD */ 145 146 #ifdef _EVENT_HAVE_TIMERCLEAR 147 #define evutil_timerclear(tvp) timerclear(tvp) 148 #else 149 #define evutil_timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 150 #endif 151 152 #define evutil_timercmp(tvp, uvp, cmp) \ 153 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 154 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 155 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 156 157 #ifdef _EVENT_HAVE_TIMERISSET 158 #define evutil_timerisset(tvp) timerisset(tvp) 159 #else 160 #define evutil_timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 161 #endif 162 163 164 /* big-int related functions */ 165 ev_int64_t evutil_strtoll(const char *s, char **endptr, int base); 166 167 168 #ifdef _EVENT_HAVE_GETTIMEOFDAY 169 #define evutil_gettimeofday(tv, tz) gettimeofday((tv), (tz)) 170 #else 171 struct timezone; 172 int evutil_gettimeofday(struct timeval *tv, struct timezone *tz); 173 #endif 174 175 int evutil_snprintf(char *buf, size_t buflen, const char *format, ...) 176 #ifdef __GNUC__ 177 __attribute__((format(printf, 3, 4))) 178 #endif 179 ; 180 int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap); 181 182 #ifdef __cplusplus 183 } 184 #endif 185 186 #endif /* _EVUTIL_H_ */ 187