GEOS
3.4.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2006 Wu Yongwei 00007 * 00008 * This is free software; you can redistribute and/or modify it under 00009 * the terms of the GNU Lesser General Public Licence as published 00010 * by the Free Software Foundation. 00011 * See the COPYING file for more information. 00012 * 00013 * Note: This code is in the public domain, see 00014 * http://wyw.dcweb.cn/time.htm 00015 * 00016 **********************************************************************/ 00017 00018 #ifndef GEOS_TIMEVAL_H 00019 #define GEOS_TIMEVAL_H 00020 00021 #ifndef WIN32_LEAN_AND_MEAN 00022 #define WIN32_LEAN_AND_MEAN 00023 #endif 00024 00025 #include <winsock2.h> 00026 #include <time.h> 00027 00028 #if defined(_MSC_VER) || defined(__BORLANDC__) 00029 #define EPOCHFILETIME (116444736000000000i64) 00030 #else 00031 #define EPOCHFILETIME (116444736000000000LL) 00032 #endif 00033 00034 struct timezone { 00035 int tz_minuteswest; /* minutes W of Greenwich */ 00036 int tz_dsttime; /* type of dst correction */ 00037 }; 00038 00039 00040 #if !defined(_WIN32_WCE) 00041 00042 __inline int gettimeofday(struct timeval *tv, struct timezone *tz) 00043 { 00044 FILETIME ft; 00045 LARGE_INTEGER li; 00046 __int64 t; 00047 static int tzflag; 00048 00049 if (tv) 00050 { 00051 GetSystemTimeAsFileTime(&ft); 00052 li.LowPart = ft.dwLowDateTime; 00053 li.HighPart = ft.dwHighDateTime; 00054 t = li.QuadPart; /* In 100-nanosecond intervals */ 00055 t -= EPOCHFILETIME; /* Offset to the Epoch time */ 00056 t /= 10; /* In microseconds */ 00057 tv->tv_sec = (long)(t / 1000000); 00058 tv->tv_usec = (long)(t % 1000000); 00059 } 00060 00061 if (tz) 00062 { 00063 if (!tzflag) 00064 { 00065 _tzset(); 00066 tzflag++; 00067 } 00068 tz->tz_minuteswest = _timezone / 60; 00069 tz->tz_dsttime = _daylight; 00070 } 00071 00072 return 0; 00073 } 00074 00075 #else 00076 00077 __inline int gettimeofday(struct timeval *tv, struct timezone *tz) 00078 { 00079 SYSTEMTIME st; 00080 FILETIME ft; 00081 LARGE_INTEGER li; 00082 TIME_ZONE_INFORMATION tzi; 00083 __int64 t; 00084 static int tzflag; 00085 00086 if (tv) 00087 { 00088 GetSystemTime(&st); 00089 SystemTimeToFileTime(&st, &ft); 00090 li.LowPart = ft.dwLowDateTime; 00091 li.HighPart = ft.dwHighDateTime; 00092 t = li.QuadPart; /* In 100-nanosecond intervals */ 00093 t -= EPOCHFILETIME; /* Offset to the Epoch time */ 00094 t /= 10; /* In microseconds */ 00095 tv->tv_sec = (long)(t / 1000000); 00096 tv->tv_usec = (long)(t % 1000000); 00097 } 00098 00099 if (tz) 00100 { 00101 GetTimeZoneInformation(&tzi); 00102 00103 tz->tz_minuteswest = tzi.Bias; 00104 if (tzi.StandardDate.wMonth != 0) 00105 { 00106 tz->tz_minuteswest += tzi.StandardBias * 60; 00107 } 00108 00109 if (tzi.DaylightDate.wMonth != 0) 00110 { 00111 tz->tz_dsttime = 1; 00112 } 00113 else 00114 { 00115 tz->tz_dsttime = 0; 00116 } 00117 } 00118 00119 return 0; 00120 } 00121 00122 #endif /* _WIN32_WCE */ 00123 00124 #endif /* GEOS_TIMEVAL_H */