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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