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_ */
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