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<h1>timeval.h</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> * $Id: timeval.h 2787 2009-12-03 19:59:06Z mloskot $</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * GEOS - Geometry Engine Open Source</span>
<a name="l00005"></a>00005 <span class="comment"> * http://geos.refractions.net</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Copyright (C) 2006 Wu Yongwei</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * This is free software; you can redistribute and/or modify it under</span>
<a name="l00010"></a>00010 <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span>
<a name="l00011"></a>00011 <span class="comment"> * by the Free Software Foundation. </span>
<a name="l00012"></a>00012 <span class="comment"> * See the COPYING file for more information.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> **********************************************************************/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#ifndef GEOS_TIMEVAL_H</span>
<a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_TIMEVAL_H</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span>
<a name="l00019"></a>00019 <span class="preprocessor">#ifndef WIN32_LEAN_AND_MEAN</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor">#define WIN32_LEAN_AND_MEAN</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <winsock2.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <time.h></span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="preprocessor">#if defined(_MSC_VER) || defined(__BORLANDC__)</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#define EPOCHFILETIME (116444736000000000i64)</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define EPOCHFILETIME (116444736000000000LL)</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span>
<a name="l00032"></a>00032 <span class="keyword">struct </span>timezone {
<a name="l00033"></a>00033 <span class="keywordtype">int</span> tz_minuteswest; <span class="comment">/* minutes W of Greenwich */</span>
<a name="l00034"></a>00034 <span class="keywordtype">int</span> tz_dsttime; <span class="comment">/* type of dst correction */</span>
<a name="l00035"></a>00035 };
<a name="l00036"></a>00036
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="preprocessor">#if !defined(_WIN32_WCE)</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 __inline <span class="keywordtype">int</span> gettimeofday(<span class="keyword">struct</span> timeval *tv, <span class="keyword">struct</span> timezone *tz)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 FILETIME ft;
<a name="l00043"></a>00043 LARGE_INTEGER li;
<a name="l00044"></a>00044 __int64 t;
<a name="l00045"></a>00045 <span class="keyword">static</span> <span class="keywordtype">int</span> tzflag;
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordflow">if</span> (tv)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 GetSystemTimeAsFileTime(&ft);
<a name="l00050"></a>00050 li.LowPart = ft.dwLowDateTime;
<a name="l00051"></a>00051 li.HighPart = ft.dwHighDateTime;
<a name="l00052"></a>00052 t = li.QuadPart; <span class="comment">/* In 100-nanosecond intervals */</span>
<a name="l00053"></a>00053 t -= EPOCHFILETIME; <span class="comment">/* Offset to the Epoch time */</span>
<a name="l00054"></a>00054 t /= 10; <span class="comment">/* In microseconds */</span>
<a name="l00055"></a>00055 tv->tv_sec = (long)(t / 1000000);
<a name="l00056"></a>00056 tv->tv_usec = (long)(t % 1000000);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">if</span> (tz)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (!tzflag)
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 _tzset();
<a name="l00064"></a>00064 tzflag++;
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 tz->tz_minuteswest = _timezone / 60;
<a name="l00067"></a>00067 tz->tz_dsttime = _daylight;
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keywordflow">return</span> 0;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="preprocessor">#else</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span>
<a name="l00075"></a>00075 __inline <span class="keywordtype">int</span> gettimeofday(<span class="keyword">struct</span> timeval *tv, <span class="keyword">struct</span> timezone *tz)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 SYSTEMTIME st;
<a name="l00078"></a>00078 FILETIME ft;
<a name="l00079"></a>00079 LARGE_INTEGER li;
<a name="l00080"></a>00080 TIME_ZONE_INFORMATION tzi;
<a name="l00081"></a>00081 __int64 t;
<a name="l00082"></a>00082 <span class="keyword">static</span> <span class="keywordtype">int</span> tzflag;
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keywordflow">if</span> (tv)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 GetSystemTime(&st);
<a name="l00087"></a>00087 SystemTimeToFileTime(&st, &ft);
<a name="l00088"></a>00088 li.LowPart = ft.dwLowDateTime;
<a name="l00089"></a>00089 li.HighPart = ft.dwHighDateTime;
<a name="l00090"></a>00090 t = li.QuadPart; <span class="comment">/* In 100-nanosecond intervals */</span>
<a name="l00091"></a>00091 t -= EPOCHFILETIME; <span class="comment">/* Offset to the Epoch time */</span>
<a name="l00092"></a>00092 t /= 10; <span class="comment">/* In microseconds */</span>
<a name="l00093"></a>00093 tv->tv_sec = (long)(t / 1000000);
<a name="l00094"></a>00094 tv->tv_usec = (long)(t % 1000000);
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (tz)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 GetTimeZoneInformation(&tzi);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 tz->tz_minuteswest = tzi.Bias;
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (tzi.StandardDate.wMonth != 0)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 tz->tz_minuteswest += tzi.StandardBias * 60;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keywordflow">if</span> (tzi.DaylightDate.wMonth != 0)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 tz->tz_dsttime = 1;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111 <span class="keywordflow">else</span>
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 tz->tz_dsttime = 0;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keywordflow">return</span> 0;
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="preprocessor">#endif </span><span class="comment">/* _WIN32_WCE */</span>
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="preprocessor">#endif </span><span class="comment">/* GEOS_TIMEVAL_H */</span>
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