1 { Copyright (C) 2005 Bas Steendijk and Peter Green
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2 For conditions of distribution and use, see copyright notice in zlib_license.txt
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3 which is included in the package
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4 ----------------------------------------------------------------------------- }
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6 this unit returns unix timestamp with seconds and microseconds (as float)
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7 works on windows/delphi, and on freepascal on unix.
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20 irctime,unixtime:integer;
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22 settimebias:integer;
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23 qpcjump:float; {can be read out and reset for debug purpose}
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24 performancecountfreq:extended;
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26 function irctimefloat:float;
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27 function irctimeint:integer;
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29 function unixtimefloat:float;
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30 function unixtimeint:integer;
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32 function wintimefloat:float;
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34 procedure settime(newtime:integer);
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35 procedure gettimezone;
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36 procedure timehandler;
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39 function timestring(i:integer):string;
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40 function timestrshort(i:integer):string;
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42 function oletounixfloat(t:float):float;
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43 function oletounix(t:tdatetime):integer;
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44 function unixtoole(i:integer):tdatetime;
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47 timefloatbias:float;
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48 lastunixtimefloat:float=0;
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61 baseunix,unix,unixutil, {needed for 2.0.2}
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68 {$include unixstuff.inc}
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72 daysdifference=25569;
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74 function oletounixfloat(t:float):float;
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76 t := (t - daysdifference) * 86400;
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80 function oletounix(t:tdatetime):integer;
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82 result := trunc(oletounixfloat(t));
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85 function unixtoole(i:integer):tdatetime;
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87 result := ((i)/86400)+daysdifference;
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91 {-----------------------------------------*nix/freepascal code to read time }
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93 function unixtimefloat:float;
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98 result := tv.tv_sec+(tv.tv_usec/1000000);
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101 function wintimefloat:extended;
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103 result := unixtimefloat;
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106 function unixtimeint:integer;
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111 result := tv.tv_sec;
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115 {------------------------------ windows/delphi code to read time}
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117 { free pascals tsystemtime is incomaptible with windows api calls
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118 so we declare it ourselves - plugwash
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122 TSystemTime = record
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130 wMilliseconds: Word;
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133 function Date_utc: extended;
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135 SystemTime: TSystemTime;
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138 GetsystemTime(@SystemTime);
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140 GetsystemTime(SystemTime);
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142 with SystemTime do Result := EncodeDate(wYear, wMonth, wDay);
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145 function Time_utc: extended;
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147 SystemTime: TSystemTime;
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150 GetsystemTime(@SystemTime);
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152 GetsystemTime(SystemTime);
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155 Result := EncodeTime(wHour, wMinute, wSecond, wMilliSeconds);
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158 function Now_utc: extended;
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160 Result := round(Date_utc) + Time_utc;
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164 highdwordconst=4294967296.0;
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166 function wintimefloat:extended;
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172 p2:tlargeinteger absolute p;
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175 if performancecountfreq = 0 then begin
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176 QueryPerformancefrequency(p2);
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178 if e < 0 then e := e + highdwordconst;
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179 performancecountfreq := ((p.highpart*highdwordconst)+e);
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181 queryperformancecounter(p2);
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183 if e < 0 then e := e + highdwordconst;
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184 result := ((p.highpart*highdwordconst)+e)/performancecountfreq;
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188 classpriority,threadpriority:integer;
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192 hprocess,hthread:integer;
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194 hProcess := GetCurrentProcess;
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195 hThread := GetCurrentThread;
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197 ClassPriority := GetPriorityClass(hProcess);
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198 ThreadPriority := GetThreadPriority(hThread);
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200 SetPriorityClass(hProcess, REALTIME_PRIORITY_CLASS);
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201 SetThreadPriority(hThread, THREAD_PRIORITY_TIME_CRITICAL);
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206 hprocess,hthread:integer;
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208 hProcess := GetCurrentProcess;
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209 hThread := GetCurrentThread;
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211 SetPriorityClass(hProcess, ClassPriority);
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212 SetThreadPriority(hThread, ThreadPriority);
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215 function unixtimefloat:float;
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219 if timefloatbias = 0 then begin
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222 repeat g := now_utc; h := wintimefloat until g > f;
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223 timefloatbias := oletounixfloat(g)-h;
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226 result := wintimefloat+timefloatbias;
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229 workaround for QPC jumps
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230 (approach 2: always check "hi res" QPC unixtime against the "guaranteed" systemtime one)
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232 f := result-(oletounixfloat(now_utc));
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233 if abs(f) > 0.02 then begin
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234 f := timefloatbias;
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235 timefloatbias := 0;
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236 result := unixtimefloat;
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237 qpcjump := qpcjump + f - timefloatbias;
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240 if (result <= lastunixtimefloat) then result := lastunixtimefloat + 0.0000001;
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241 lastunixtimefloat := result;
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244 function unixtimeint:integer;
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246 result := trunc(unixtimefloat);
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250 {-----------------------------------------------end of platform specific}
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252 function irctimefloat:float;
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254 result := unixtimefloat+settimebias;
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257 function irctimeint:integer;
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259 result := unixtimeint+settimebias;
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263 procedure settime(newtime:integer);
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267 a := irctimeint-settimebias;
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268 if newtime = 0 then settimebias := 0 else settimebias := newtime-a;
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270 irctime := irctimeint;
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273 procedure timehandler;
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275 if unixtime = 0 then init;
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276 unixtime := unixtimeint;
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277 irctime := irctimeint;
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278 if unixtime and 63 = 0 then begin
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279 {update everything, apply timezone changes, clock changes, etc}
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281 timefloatbias := 0;
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282 unixtime := unixtimeint;
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283 irctime := irctimeint;
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288 procedure gettimezone;
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304 timezone := tzseconds;
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307 timezone := (longint(hh) * 3600 + mm * 60 + ss) - (unixtimeint mod 86400);
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310 timezone := round((now-now_utc)*86400);
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313 while timezone > 43200 do dec(timezone,86400);
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314 while timezone < -43200 do inc(timezone,86400);
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316 if timezone >= 0 then timezonestr := '+' else timezonestr := '-';
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317 l := abs(timezone) div 60;
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318 timezonestr := timezonestr + char(l div 600 mod 10+48)+char(l div 60 mod 10+48)+':'+char(l div 10 mod 6+48)+char(l mod 10+48);
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321 function timestrshort(i:integer):string;
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323 weekday:array[0..6] of string[4]=('Thu','Fri','Sat','Sun','Mon','Tue','Wed');
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324 month:array[0..11] of string[4]=('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
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326 y,m,d,h,min,sec,ms:word;
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329 t := unixtoole(i+timezone);
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330 decodedate(t,y,m,d);
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331 decodetime(t,h,min,sec,ms);
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332 result := weekday[(i+timezone) div 86400 mod 7]+' '+month[m-1]+' '+inttostr(d)+' '+
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333 inttostr(h div 10)+inttostr(h mod 10)+':'+inttostr(min div 10)+inttostr(min mod 10)+':'+inttostr(sec div 10)+inttostr(sec mod 10)+' '+
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337 function timestring(i:integer):string;
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339 weekday:array[0..6] of string[10]=('Thursday','Friday','Saturday','Sunday','Monday','Tuesday','Wednesday');
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340 month:array[0..11] of string[10]=('January','February','March','April','May','June','July','August','September','October','November','December');
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342 y,m,d,h,min,sec,ms:word;
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345 t := unixtoole(i+timezone);
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346 decodedate(t,y,m,d);
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347 decodetime(t,h,min,sec,ms);
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348 result := weekday[(i+timezone) div 86400 mod 7]+' '+month[m-1]+' '+inttostr(d)+' '+inttostr(y)+' -- '+
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349 inttostr(h div 10)+inttostr(h mod 10)+':'+inttostr(min div 10)+inttostr(min mod 10)+':'+inttostr(sec div 10)+inttostr(sec mod 10)+' '+
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358 unixtime := unixtimeint;
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359 irctime := irctimeint;
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