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<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
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<title>Harbour Reference Guide · hbct lib</title>
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<aside>
<a href="#acos" title="Acos()"><code>Acos()</code></a>
<a href="#addascii" title="AddAscii()"><code>AddAscii()</code></a>
<a href="#addmonth" title="AddMonth()"><code>AddMonth()</code></a>
<a href="#afteratnum" title="AfterAtNum()"><code>AfterAtNum()</code></a>
<a href="#asciisum" title="AsciiSum()"><code>AsciiSum()</code></a>
<a href="#ascpos" title="AscPos()"><code>AscPos()</code></a>
<a href="#asin" title="Asin()"><code>Asin()</code></a>
<a href="#atan" title="Atan()"><code>Atan()</code></a>
<a href="#atadjust" title="AtAdjust()"><code>AtAdjust()</code></a>
<a href="#atn2" title="Atn2()"><code>Atn2()</code></a>
<a href="#atnum" title="AtNum()"><code>AtNum()</code></a>
<a href="#atrepl" title="AtRepl()"><code>AtRepl()</code></a>
<a href="#attoken" title="AtToken()"><code>AtToken()</code></a>
<a href="#beforatnum" title="BeforAtNum()"><code>BeforAtNum()</code></a>
<a href="#bittoc" title="BitToC()"><code>BitToC()</code></a>
<a href="#bom" title="BoM()"><code>BoM()</code></a>
<a href="#boq" title="BoQ()"><code>BoQ()</code></a>
<a href="#boy" title="BoY()"><code>BoY()</code></a>
<a href="#ceiling" title="Ceiling()"><code>Ceiling()</code></a>
<a href="#celsius" title="Celsius()"><code>Celsius()</code></a>
<a href="#charadd" title="CharAdd()"><code>CharAdd()</code></a>
<a href="#charand" title="CharAnd()"><code>CharAnd()</code></a>
<a href="#chareven" title="CharEven()"><code>CharEven()</code></a>
<a href="#charhist" title="CharHist()"><code>CharHist()</code></a>
<a href="#charlist" title="CharList()"><code>CharList()</code></a>
<a href="#charmirr" title="CharMirr()"><code>CharMirr()</code></a>
<a href="#charmix" title="CharMix()"><code>CharMix()</code></a>
<a href="#charnolist" title="CharNoList()"><code>CharNoList()</code></a>
<a href="#charnot" title="CharNot()"><code>CharNot()</code></a>
<a href="#charodd" title="CharOdd()"><code>CharOdd()</code></a>
<a href="#charone" title="CharOne()"><code>CharOne()</code></a>
<a href="#charonly" title="CharOnly()"><code>CharOnly()</code></a>
<a href="#charor" title="CharOr()"><code>CharOr()</code></a>
<a href="#charpix" title="CharPix()"><code>CharPix()</code></a>
<a href="#charrela" title="CharRelA()"><code>CharRelA()</code></a>
<a href="#charrelrep" title="CharRelRep()"><code>CharRelRep()</code></a>
<a href="#charrem" title="CharRem()"><code>CharRem()</code></a>
<a href="#charrepl" title="CharRepl()"><code>CharRepl()</code></a>
<a href="#charrll" title="CharRll()"><code>CharRll()</code></a>
<a href="#charrlr" title="CharRlr()"><code>CharRlr()</code></a>
<a href="#charshl" title="CharShl()"><code>CharShl()</code></a>
<a href="#charshr" title="CharShr()"><code>CharShr()</code></a>
<a href="#charslist" title="CharSList()"><code>CharSList()</code></a>
<a href="#charsort" title="CharSort()"><code>CharSort()</code></a>
<a href="#charsub" title="CharSub()"><code>CharSub()</code></a>
<a href="#charswap" title="CharSwap()"><code>CharSwap()</code></a>
<a href="#charwin" title="CharWin()"><code>CharWin()</code></a>
<a href="#charxor" title="CharXor()"><code>CharXor()</code></a>
<a href="#colorrepl" title="ColorRepl()"><code>ColorRepl()</code></a>
<a href="#colorton" title="ColorToN()"><code>ColorToN()</code></a>
<a href="#colorwin" title="ColorWin()"><code>ColorWin()</code></a>
<a href="#cos" title="Cos()"><code>Cos()</code></a>
<a href="#cosh" title="Cosh()"><code>Cosh()</code></a>
<a href="#cot" title="Cot()"><code>Cot()</code></a>
<a href="#countleft" title="CountLeft()"><code>CountLeft()</code></a>
<a href="#countright" title="CountRight()"><code>CountRight()</code></a>
<a href="#csetargerr" title="CSetArgErr()"><code>CSetArgErr()</code></a>
<a href="#csetatmupa" title="CSetAtMupa()"><code>CSetAtMupa()</code></a>
<a href="#csetref" title="CSetRef()"><code>CSetRef()</code></a>
<a href="#ctobit" title="CToBit()"><code>CToBit()</code></a>
<a href="#ctodow" title="CToDoW()"><code>CToDoW()</code></a>
<a href="#ctof" title="CToF()"><code>CToF()</code></a>
<a href="#ctomonth" title="CToMonth()"><code>CToMonth()</code></a>
<a href="#cton" title="CToN()"><code>CToN()</code></a>
<a href="#dmy" title="DMY()"><code>DMY()</code></a>
<a href="#doy" title="DoY()"><code>DoY()</code></a>
<a href="#dtor" title="DToR()"><code>DToR()</code></a>
<a href="#enhanced" title="Enhanced()"><code>Enhanced()</code></a>
<a href="#eom" title="EoM()"><code>EoM()</code></a>
<a href="#eoq" title="EoQ()"><code>EoQ()</code></a>
<a href="#eoy" title="EoY()"><code>EoY()</code></a>
<a href="#exponent" title="Exponent()"><code>Exponent()</code></a>
<a href="#fact" title="Fact()"><code>Fact()</code></a>
<a href="#fahrenheit" title="Fahrenheit()"><code>Fahrenheit()</code></a>
<a href="#floor" title="Floor()"><code>Floor()</code></a>
<a href="#ftoc" title="FToC()"><code>FToC()</code></a>
<a href="#fv" title="FV()"><code>FV()</code></a>
<a href="#getprec" title="GetPrec()"><code>GetPrec()</code></a>
<a href="#infinity" title="Infinity()"><code>Infinity()</code></a>
<a href="#invertattr" title="InvertAttr()"><code>InvertAttr()</code></a>
<a href="#invertwin" title="InvertWin()"><code>InvertWin()</code></a>
<a href="#isleap" title="IsLeap()"><code>IsLeap()</code></a>
<a href="#justleft" title="JustLeft()"><code>JustLeft()</code></a>
<a href="#justright" title="JustRight()"><code>JustRight()</code></a>
<a href="#ksetcaps" title="KSetCaps()"><code>KSetCaps()</code></a>
<a href="#ksetins" title="KSetIns()"><code>KSetIns()</code></a>
<a href="#ksetnum" title="KSetNum()"><code>KSetNum()</code></a>
<a href="#ksetscroll" title="KSetScroll()"><code>KSetScroll()</code></a>
<a href="#lastdayom" title="LastDayOM()"><code>LastDayOM()</code></a>
<a href="#log10" title="Log10()"><code>Log10()</code></a>
<a href="#mantissa" title="Mantissa()"><code>Mantissa()</code></a>
<a href="#mdy" title="MDY()"><code>MDY()</code></a>
<a href="#ntoc" title="NToC()"><code>NToC()</code></a>
<a href="#ntocdow" title="NToCDoW()"><code>NToCDoW()</code></a>
<a href="#ntocmonth" title="NToCMonth()"><code>NToCMonth()</code></a>
<a href="#ntocolor" title="NToColor()"><code>NToColor()</code></a>
<a href="#numat" title="NumAt()"><code>NumAt()</code></a>
<a href="#numtoken" title="NumToken()"><code>NumToken()</code></a>
<a href="#padleft" title="PadLeft()"><code>PadLeft()</code></a>
<a href="#padright" title="PadRight()"><code>PadRight()</code></a>
<a href="#payment" title="Payment()"><code>Payment()</code></a>
<a href="#periods" title="Periods()"><code>Periods()</code></a>
<a href="#pi" title="Pi()"><code>Pi()</code></a>
<a href="#posalpha" title="PosAlpha()"><code>PosAlpha()</code></a>
<a href="#poschar" title="PosChar()"><code>PosChar()</code></a>
<a href="#posdel" title="PosDel()"><code>PosDel()</code></a>
<a href="#posdiff" title="PosDiff()"><code>PosDiff()</code></a>
<a href="#posequal" title="PosEqual()"><code>PosEqual()</code></a>
<a href="#posins" title="PosIns()"><code>PosIns()</code></a>
<a href="#poslower" title="PosLower()"><code>PosLower()</code></a>
<a href="#posrange" title="PosRange()"><code>PosRange()</code></a>
<a href="#posrepl" title="PosRepl()"><code>PosRepl()</code></a>
<a href="#posupper" title="PosUpper()"><code>PosUpper()</code></a>
<a href="#printready" title="PrintReady()"><code>PrintReady()</code></a>
<a href="#printstat" title="PrintStat()"><code>PrintStat()</code></a>
<a href="#pv" title="PV()"><code>PV()</code></a>
<a href="#quarter" title="Quarter()"><code>Quarter()</code></a>
<a href="#rangerem" title="RangeRem()"><code>RangeRem()</code></a>
<a href="#rate" title="Rate()"><code>Rate()</code></a>
<a href="#rangerepl" title="RANGEREPL"><code>RANGEREPL</code></a>
<a href="#remall" title="RemAll()"><code>RemAll()</code></a>
<a href="#remleft" title="RemLeft()"><code>RemLeft()</code></a>
<a href="#remright" title="RemRight()"><code>RemRight()</code></a>
<a href="#replall" title="ReplAll()"><code>ReplAll()</code></a>
<a href="#replleft" title="ReplLeft()"><code>ReplLeft()</code></a>
<a href="#replright" title="ReplRight()"><code>ReplRight()</code></a>
<a href="#resttoken" title="RestToken()"><code>RestToken()</code></a>
<a href="#rtod" title="RToD()"><code>RToD()</code></a>
<a href="#savetoken" title="SaveToken()"><code>SaveToken()</code></a>
<a href="#sayscreen" title="SayScreen()"><code>SayScreen()</code></a>
<a href="#screenattr" title="ScreenAttr()"><code>ScreenAttr()</code></a>
<a href="#screenmix" title="ScreenMix()"><code>ScreenMix()</code></a>
<a href="#screentext" title="ScreenText()"><code>ScreenText()</code></a>
<a href="#setatlike" title="SetAtLike()"><code>SetAtLike()</code></a>
<a href="#setdate" title="SetDate()"><code>SetDate()</code></a>
<a href="#setfont" title="SetFont()"><code>SetFont()</code></a>
<a href="#setprec" title="SetPrec()"><code>SetPrec()</code></a>
<a href="#settime" title="SetTime()"><code>SetTime()</code></a>
<a href="#sign" title="Sign()"><code>Sign()</code></a>
<a href="#sin" title="Sin()"><code>Sin()</code></a>
<a href="#sinh" title="Sinh()"><code>Sinh()</code></a>
<a href="#standard" title="Standard()"><code>Standard()</code></a>
<a href="#strdiff" title="StrDiff()"><code>StrDiff()</code></a>
<a href="#strswap" title="StrSwap()"><code>StrSwap()</code></a>
<a href="#tabexpand" title="TabExpand()"><code>TabExpand()</code></a>
<a href="#tabpack" title="TabPack()"><code>TabPack()</code></a>
<a href="#tan" title="Tan()"><code>Tan()</code></a>
<a href="#tanh" title="Tanh()"><code>Tanh()</code></a>
<a href="#timevalid" title="TimeValid()"><code>TimeValid()</code></a>
<a href="#token" title="Token()"><code>Token()</code></a>
<a href="#tokenat" title="TokenAt()"><code>TokenAt()</code></a>
<a href="#tokenend" title="TokenEnd()"><code>TokenEnd()</code></a>
<a href="#tokenexit" title="TokenExit()"><code>TokenExit()</code></a>
<a href="#tokeninit" title="TokenInit()"><code>TokenInit()</code></a>
<a href="#tokenlower" title="TokenLower()"><code>TokenLower()</code></a>
<a href="#tokennext" title="TokenNext()"><code>TokenNext()</code></a>
<a href="#tokennum" title="TokenNum()"><code>TokenNum()</code></a>
<a href="#tokensep" title="TokenSep()"><code>TokenSep()</code></a>
<a href="#tokenupper" title="TokenUpper()"><code>TokenUpper()</code></a>
<a href="#unselected" title="Unselected()"><code>Unselected()</code></a>
<a href="#untextwin" title="UnTextWin()"><code>UnTextWin()</code></a>
<a href="#valpos" title="ValPos()"><code>ValPos()</code></a>
<a href="#vgapalette" title="VGAPalette()"><code>VGAPalette()</code></a>
<a href="#videotype" title="VideoType()"><code>VideoType()</code></a>
<a href="#waitperiod" title="WaitPeriod()"><code>WaitPeriod()</code></a>
<a href="#week" title="Week()"><code>Week()</code></a>
<a href="#wordone" title="WordOne()"><code>WordOne()</code></a>
<a href="#wordonly" title="WordOnly()"><code>WordOnly()</code></a>
<a href="#wordrem" title="WordRem()"><code>WordRem()</code></a>
<a href="#wordrepl" title="WordRepl()"><code>WordRepl()</code></a>
<a href="#wordswap" title="WordSwap()"><code>WordSwap()</code></a>
<a href="#wordtochar" title="WordToChar()"><code>WordToChar()</code></a>
<a href="#xtoc" title="XToC()"><code>XToC()</code></a>
</aside>
<main>
<section>
<h4><a href="#addmonth" class="d-id" id="addmonth" title="∞"><code>AddMonth()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L250" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=AddMonth">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+AddMonth">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/dattime2.txt">Improve this doc</a></span></h4>
<div class="d-ol">add months to a date</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>AddMonth( [<dDate>,] <nMonths> ) → dShiftedDate</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#bom" class="d-id" id="bom" title="∞"><code>BoM()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L52" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=BoM">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+BoM">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/datetime.txt">Improve this doc</a></span></h4>
<div class="d-ol">Begin of Month</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>BoM( [<dDate>] ) → dDateBeginOfMonth</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#boq">BoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boy">BoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boy">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoq">EoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoy">EoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#boq" class="d-id" id="boq" title="∞"><code>BoQ()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L102" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=BoQ">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+BoQ">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/datetime.txt">Improve this doc</a></span></h4>
<div class="d-ol">Begin of Quarter</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>BoQ( [<dDate>] ) → dDateBeginOfQuarter</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#bom">BoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#bom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boy">BoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boy">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoq">EoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoy">EoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#boy" class="d-id" id="boy" title="∞"><code>BoY()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L154" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=BoY">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+BoY">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/datetime.txt">Improve this doc</a></span></h4>
<div class="d-ol">Begin of Year</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>BoY( [<dDate>] ) → dDateBeginOfYear</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#bom">BoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#bom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boq">BoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoq">EoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoy">EoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#ctodow" class="d-id" id="ctodow" title="∞"><code>CToDoW()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L99" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=CToDoW">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+CToDoW">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/dattime2.txt">Improve this doc</a></span></h4>
<div class="d-ol">convert name of day of the week to its ordinal number</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>CToDoW( <cName> ) → nOrdinal</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#ntocdow">NToCDoW()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#ntocdow">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#ctomonth" class="d-id" id="ctomonth" title="∞"><code>CToMonth()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L120" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=CToMonth">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+CToMonth">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/dattime2.txt">Improve this doc</a></span></h4>
<div class="d-ol">convert name of month to its ordinal number</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>CToMonth( <cName> ) → nOrdinal</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#ntocmonth">NToCMonth()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#ntocmonth">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#dmy" class="d-id" id="dmy" title="∞"><code>DMY()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L140" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=DMY">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+DMY">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/dattime2.txt">Improve this doc</a></span></h4>
<div class="d-ol">Returns the date as a string in <code>DD Month YY</code> format</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>DMY( [<dDate>][, <lMode>] ) → cDateString</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>Returns the date as a string in <code>DD Month YY</code> format. If <code>lMode</code> is TRUE, a "." is inserted after the <code>DD</code>.</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#mdy">MDY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#mdy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#doy" class="d-id" id="doy" title="∞"><code>DoY()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L300" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=DoY">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+DoY">in Discussions</a></nav></nav></span>
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<div class="d-ol">Determines the day of the year for a specific date</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>DMY( [<dDate>] ) → nDayOfYear</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>Determines the day of the year for a specific date if <code>dDate</code> is invalid, returns 0.</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#eom" class="d-id" id="eom" title="∞"><code>EoM()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L74" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=EoM">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+EoM">in Discussions</a></nav></nav></span>
<span class="d-eb"><a href="#" title="Top" class="d-ebi">⌃</a> | <a href="index.html" title="Index" class="d-ebi">☰</a> | <a href="https://github.com/vszakats/hb/edit/main/contrib/hbct/doc/en/datetime.txt">Improve this doc</a></span></h4>
<div class="d-ol">End of Month</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>EoM( [<dDate>] ) → dDateEndOfMonth</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#bom">BoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#bom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boq">BoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boy">BoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boy">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoq">EoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoy">EoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#eoq" class="d-id" id="eoq" title="∞"><code>EoQ()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L126" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=EoQ">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+EoQ">in Discussions</a></nav></nav></span>
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<div class="d-ol">End of Quarter</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>EoQ( [<dDate>] ) → dDateEndOfQuarter</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#bom">BoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#bom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boq">BoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boy">BoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boy">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoy">EoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#eoy" class="d-id" id="eoy" title="∞"><code>EoY()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/datetime.c#L176" class="d-so" title="contrib/hbct/datetime.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=EoY">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+EoY">in Discussions</a></nav></nav></span>
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<div class="d-ol">End of Year</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>EoY( [<dDate>] ) → dDateEndOfYear</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#bom">BoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#bom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boq">BoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boq">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#boy">BoY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#boy">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#eoq">EoQ()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eoq">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#isleap" class="d-id" id="isleap" title="∞"><code>IsLeap()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L317" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=IsLeap">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+IsLeap">in Discussions</a></nav></nav></span>
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<div class="d-ol">determines of year of date is a leap year</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>IsLeap( [<dDate>] ) → lIsLeap</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add further documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#lastdayom" class="d-id" id="lastdayom" title="∞"><code>LastDayOM()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L341" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=LastDayOM">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+LastDayOM">in Discussions</a></nav></nav></span>
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<div class="d-ol">Returns the the number of days in the month.</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>LastDayOM( [<dDate|nMonth>] ) → nDaysInMonth</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p><code>dDate|nMonth</code> can be a date or a month number. If empty uses the system date. If <code>nMonth</code> is a 2, <code>LastDayOM()</code> will not know if it is a leap year or not. If <code>dDate</code> is invalid, returns 0</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#eom">EoM()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#eom">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#mdy" class="d-id" id="mdy" title="∞"><code>MDY()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L202" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=MDY">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+MDY">in Discussions</a></nav></nav></span>
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<div class="d-ol">Returns the date as a string in <code>Month DD, YY</code> or <code>Month DD, YYYY</code></div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>MDY( [<dDate>] ) → cDateString</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>Returns the date as a string in <code>Month DD, YY</code> or <code>Month DD, YYYY</code>. If <code>dDate</code> is <code>NULL</code>, the system date is used.</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#dmy">DMY()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#dmy">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#ntocdow" class="d-id" id="ntocdow" title="∞"><code>NToCDoW()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L361" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=NToCDoW">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+NToCDoW">in Discussions</a></nav></nav></span>
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<div class="d-ol">(num of day) → day name</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>NToCDoW( <nDay> ) → cDay</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#ctodow">CToDoW()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#ctodow">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#ntocmonth" class="d-id" id="ntocmonth" title="∞"><code>NToCMonth()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L366" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=NToCMonth">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+NToCMonth">in Discussions</a></nav></nav></span>
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<div class="d-ol">(num of month ) → Month Name</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>NToCMonth( <nMonth> ) → cMonth</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">TODO: add documentation</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#ctomonth">CToMonth()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#ctomonth">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#quarter" class="d-id" id="quarter" title="∞"><code>Quarter()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L329" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Quarter">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Quarter">in Discussions</a></nav></nav></span>
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<div class="d-ol">Returns a number equal to the quarter in which a date falls</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Quarter( [<dDate>] ) → nQuarter</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>Returns a number equal to the quarter in which <code>dDate</code> falls. If <code>dDate</code> is empty, the system date is employed.</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#setdate" class="d-id" id="setdate" title="∞"><code>SetDate()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime3.c#L172" class="d-so" title="contrib/hbct/dattime3.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=SetDate">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+SetDate">in Discussions</a></nav></nav></span>
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<div class="d-ol">Sets the system date</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>SetDate( <dDate>, [<lMode>] ) → lSet</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it">
<div><code>dDate</code> Designates which date to use to set the system date.</div>
<div><code>lMode</code> Designates whether the date should also be set in the CMOS-RAM of an AT. The default is do not write (<code>.F.</code>). Note that in Windows platform this adjust is automatic, therefore this parameter is without effect.</div>
</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>SetDate()</code> returns <code>.T.</code> when the date is successfully set.</div>
<div class="d-d">Description</div>
<div class="d-it">When you use this function to set the system date from within your application, all files acquire this date with each write procedure.</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">LOCAL dNewDate
// Set the system date in each case; but the hardware clock only
// on an AT:
dNewDate := 0d19910730
IF IsAt()
SetDate( dNewDate, .T. )
ELSE
SetDate( dNewDate )
ENDIF
// Or, more compactly:
SetDate( dNewDate, IsAt() )
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">
<div>Available on Linux</div>
<div>Available on Windows</div>
</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#settime">SetTime()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#settime">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#settime" class="d-id" id="settime" title="∞"><code>SetTime()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime3.c#L133" class="d-so" title="contrib/hbct/dattime3.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=SetTime">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+SetTime">in Discussions</a></nav></nav></span>
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<div class="d-ol">Sets the system clock</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>SetTime( <cTime>, [<lMode>] ) → lSet</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it">
<div><code>cTime</code> Designates a character string that contains the time that is to become the system time.</div>
<div><code>lMode</code> Designates whether the time should also be set in the CMOS-RAM of an AT. The default is do not write to CMOS-RAM. Note that in Windows platform this adjust is automatic, therefore this parameter is without effect.</div>
</div>
<div class="d-d">Returns</div>
<div class="d-it">The function returns <code>.T.</code> when the time is set successfully.</div>
<div class="d-d">Description</div>
<div class="d-it">When you use this function to convert the time into the system time from within your application, all files acquire this time with each write procedure.</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">LOCAL cNewTime
// Set the system time in each case; but the hardware clock only
// on an AT:
cNewTime := "10:20:00"
IF IsAt()
SetTime( cNewTime, .T. )
ELSE
SetTime( cNewTime )
ENDIF
// Or, more compactly:
SetTime( cNewTime, IsAt() )
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">
<div>Available on Linux</div>
<div>Available on Windows</div>
</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#setdate">SetDate()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#setdate">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#timevalid">TimeValid()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#timevalid">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#timevalid" class="d-id" id="timevalid" title="∞"><code>TimeValid()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime3.c#L128" class="d-so" title="contrib/hbct/dattime3.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=TimeValid">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+TimeValid">in Discussions</a></nav></nav></span>
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<div class="d-ol">Determines whether a specified time is valid</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>TimeValid( <cTime> ) → lValid</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>cTime</code> Designates a character string that contains the time to test.</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>TimeValid()</code> returns <code>.T.</code> when <code>cTime</code> is a valid time; or <code>.F.</code> when <code>cTime</code> is an invalid time.</div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>With input that requires time manipulation, writing your own UDF to check time inputs was unavoidable up to now. <code>TimeValid()</code> permits Complete checking of a time designation. You can use this function effectively with a <code>VALID</code> clause within a <code>READ</code> mask.</div>
<div><p>Note</div>
<div><p>Note the format for time designations. There must always be two digits for hours, minutes, seconds, and hundredths; otherwise, the time it is regarded as invalid. Valid examples are <code>"12"</code>, <code>"12:59"</code>, <code>"12:59:59"</code>, and <code>"12:59:59:99"</code>. By contrast, invalid examples are <code>"24"</code>, <code>"12:60"</code>, or <code>"12:1"</code>, and/or <code>"12:"</code>. If you work with time strings that are not completely filled and that you need to check with <code>TimeValid()</code>, then they must be <code><a href="harbour.html#rtrim" title="harbour">RTrim()</a></code>-med prior to the use of <code>TimeValid()</code> (see following Examples).</div>
</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">LOCAL cBegin, GetList := {}
// Using the VALID clause with RTrim(), all valid times are
// accepted, even if no seconds or minutes are specified:
cBegin := Space( 11 )
@ 5, 10 SAY "Please input time for beginning work:";
GET cBegin VALID TimeValid( RTrim( cBegin ) )
READ
// Using a VALID clause without TRIM, hours and minutes must be
// specified, so that TimeValid() can confirm a valid time:
cBegin := Space( 5 )
@ 5, 10 SAY "Please input time for beginning work:" ;
GET cBegin VALID TimeValid( cBegin )
READ
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#settime">SetTime()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#settime">Clipper Tools 3</a></nav></nav></div>
</section>
<section>
<h4><a href="#waitperiod" class="d-id" id="waitperiod" title="∞"><code>WaitPeriod()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime3.c#L81" class="d-so" title="contrib/hbct/dattime3.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=WaitPeriod">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+WaitPeriod">in Discussions</a></nav></nav></span>
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<div class="d-ol">Pauses a specified time in increments of 1/100 seconds</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>WaitPeriod( [<nDelay>] ) → lNotElapsed</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>nDelay</code> Designates the waiting period at initialization in 1/100ths of seconds. Values from 1 to 8, 640, 000 (one day) are possible.</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>WaitPeriod()</code> returns <code>.T.</code>, if the time span designated at initialization has not elapsed.</div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>This function sets a time span for a <code>DO WHILE</code> loop to run. The function must initialize prior to the loop, since you must specify the <code>nDelay</code> parameter in 1/100th seconds. Subsequently, the function can be implemented without a parameter for additional loop conditions. It returns <code>.T.</code>, as long as the designated time span has not yet run out.</div>
<div><p>Note:</div>
<div><p>The function notes the status of the internal timer at initialization. From that point on, the initialization should always precede the respective <code>DO WHILE</code>; otherwise, the time delay is incorrect. The passing of midnight (the time resets to the 0 value) is taken into account.</div>
</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">// Run a loop for 5 seconds:
WaitPeriod( 500 ) // Initialization, 5 seconds
DO WHILE <cond1> .AND. <cond2> .AND. WaitPeriod()
// ...
ENDDO
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#week" class="d-id" id="week" title="∞"><code>Week()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/dattime2.c#L371" class="d-so" title="contrib/hbct/dattime2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Week">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Week">in Discussions</a></nav></nav></span>
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<div class="d-ol">Returns the calendar week a number</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Week( [<dDate>][, <lSWN>] ) → nWeek</code></pre></div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>Returns the calendar week a number. If no date is specified, the system date is used. An empty date via <code>hb_SToD()</code> returns 0.</div>
<div><p>If <code>lSWN</code> is <code>.T.</code>, <code>Week()</code> will calculate the "simple week number", defined by</div>
<div><p>- week #1 starts on January, 1st - week #(n+1) starts seven days after start of week #n</div>
<div><p>If <code>lSWN</code> is <code>.F.</code> (default), the ISO 8601 week number, defined by</div>
<div><p>- weeks start on Mondays - week #1 is the one that includes January, 4</div>
<div><p>will be calculated</div>
<div><p>TODO: add further documentation</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 date and time functions</div>
</section>
<section>
<h4><a href="#csetargerr" class="d-id" id="csetargerr" title="∞"><code>CSetArgErr()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/ctc.c#L213" class="d-so" title="contrib/hbct/ctc.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=CSetArgErr">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+CSetArgErr">in Discussions</a></nav></nav></span>
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<div class="d-ol">Sets argument error behaviour</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>CSetArgErr( [<nNewMode>] ) → nOldMode</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it">[<code>nNewMode</code>] New argument error throwing mode</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>nOldMode</code> The current or old argument error throwing mode.</div>
<div class="d-d">Description</div>
<div class="d-it">
<div><p>All CT3 functions are very compliant in their reaction to wrong parameters. By using the <code>CSetArgErr()</code> function, you can make the library throw an error with the severity <code>nNewMode</code>. It is then up to the error handler to substitute the return value. <code>nNewMode</code> can be one of the severity modes defined in <code><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/ct.ch">ct.ch</a></code>:</div>
<div class="d-t d-t0">
<div> CT_ARGERR_WHOCARES corresponds to ES_WHOCARES</div>
<div> CT_ARGERR_WARNING corresponds to ES_WARNING</div>
<div> CT_ARGERR_ERROR corresponds to ES_ERROR</div>
<div> CT_ARGERR_CATASTROPHIC corresponds to ES_CATASTROPHIC</div>
<div> CT_ARGERR_IGNORE</div>
</div>
<div><p>The last is the default behaviour and switches any argument error throwing off.</div>
</div>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 general functions</div>
</section>
<section>
<h4><a href="#acos" class="d-id" id="acos" title="∞"><code>Acos()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/trig.c#L249" class="d-so" title="contrib/hbct/trig.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Acos">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Acos">in Discussions</a></nav></nav></span>
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<div class="d-ol">Arcus cosine of the argument</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Acos( nCosine ) → nRadiant</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>nCosine</code> the cosine of an angle</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>nRadiant</code> the angle whose cosine is <code>nCosine</code></div>
<div class="d-d">Description</div>
<div class="d-it">The function <code>Acos()</code> is the inverse function of <code><a href="#cos">Cos()</a></code>. It takes a cosine value and returns the smallest(!) angle whose cosine equals to the argument. The return value is given in radiants (full angle equals <code>2 * <code><a href="#pi">Pi()</a></code></code> - see <code><a href="#dtor">DToR()</a></code> if you need to convert it into degrees). Note, that <code>nCosine</code> must be between -1 and 1 and that <code>nRadiant</code> is always between 0 and <code><a href="#pi">Pi()</a></code>.</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">? Acos( 0.0 ) // --> Pi() / 2
? Acos( 0.5 ) // --> 1.04719...
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 math functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#asin">Asin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#asin">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atan">Atan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atan">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atn2">Atn2()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atn2">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#cos">Cos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cos">Clipper Tools 3</a></nav></nav>, <code><a href="#cosh">Cosh()</a></code>, <nav class="dropdown"><code><a href="#cot">Cot()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cot">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#dtor">DToR()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#dtor">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#pi">Pi()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#pi">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#rtod">RToD()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#rtod">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#sin">Sin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#sin">Clipper Tools 3</a></nav></nav>, <code><a href="#sinh">Sinh()</a></code>, <nav class="dropdown"><code><a href="#tan">Tan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#tan">Clipper Tools 3</a></nav></nav>, <code><a href="#tanh">Tanh()</a></code></div>
</section>
<section>
<h4><a href="#asin" class="d-id" id="asin" title="∞"><code>Asin()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/trig.c#L213" class="d-so" title="contrib/hbct/trig.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Asin">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Asin">in Discussions</a></nav></nav></span>
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<div class="d-ol">Arcus sine of the argument</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Asin( nSine ) → nRadiant</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>nSine</code> the sine of an angle</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>nRadiant</code> the angle whose sine is <code>nSine</code></div>
<div class="d-d">Description</div>
<div class="d-it">The function <code>Asin()</code> is the inverse function of <code><a href="#sin">Sin()</a></code>. It takes a sine value and returns the smallest(!) angle whose sine equals to the argument. The return value is given in radiants (full angle equals <code>2 * <code><a href="#pi">Pi()</a></code></code> - see <code><a href="#dtor">DToR()</a></code> if you need to convert it into degrees). Note, that <code>nSine</code> must be between -1 and 1 and that <code>nRadiant</code> is always between <code>-<code><a href="#pi">Pi()</a></code> / 2</code> and <code><code><a href="#pi">Pi()</a></code> / 2</code>.</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">? Asin( 0.0 ) // --> 0.0
? Asin( 0.5 ) // --> 0.5235...
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 math functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#acos">Acos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#acos">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atan">Atan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atan">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atn2">Atn2()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atn2">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#cos">Cos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cos">Clipper Tools 3</a></nav></nav>, <code><a href="#cosh">Cosh()</a></code>, <nav class="dropdown"><code><a href="#cot">Cot()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cot">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#dtor">DToR()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#dtor">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#pi">Pi()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#pi">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#rtod">RToD()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#rtod">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#sin">Sin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#sin">Clipper Tools 3</a></nav></nav>, <code><a href="#sinh">Sinh()</a></code>, <nav class="dropdown"><code><a href="#tan">Tan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#tan">Clipper Tools 3</a></nav></nav>, <code><a href="#tanh">Tanh()</a></code></div>
</section>
<section>
<h4><a href="#atan" class="d-id" id="atan" title="∞"><code>Atan()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/trig.c#L285" class="d-so" title="contrib/hbct/trig.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Atan">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Atan">in Discussions</a></nav></nav></span>
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<div class="d-ol">Arcus tangent of the argument</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Acos( nTangent ) → nRadiant</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>nTangent</code> the tangent of an angle</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>nRadiant</code> the angle whose tangent is <code>nTangent</code></div>
<div class="d-d">Description</div>
<div class="d-it">The function <code>Atan()</code> is the inverse function of <code><a href="#tan">Tan()</a></code>. It takes a tangent value and returns the smallest(!) angle whose tangent equals to the argument. The return value is given in radiants between <code>-<code><a href="#pi">Pi()</a></code> / 2</code> and <code><code><a href="#pi">Pi()</a></code> / 2</code> (full angle equals <code>2 * <code><a href="#pi">Pi()</a></code></code> - see <code><a href="#dtor">DToR()</a></code> if you need to convert it into degrees).</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">? Atan( 0.0 ) // --> 0.0
? Atan( 0.5 ) // --> 0.4636...
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 math functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#acos">Acos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#acos">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#asin">Asin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#asin">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atan">Atan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atan">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#cos">Cos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cos">Clipper Tools 3</a></nav></nav>, <code><a href="#cosh">Cosh()</a></code>, <nav class="dropdown"><code><a href="#cot">Cot()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cot">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#dtor">DToR()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#dtor">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#pi">Pi()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#pi">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#rtod">RToD()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#rtod">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#sin">Sin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#sin">Clipper Tools 3</a></nav></nav>, <code><a href="#sinh">Sinh()</a></code>, <nav class="dropdown"><code><a href="#tan">Tan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#tan">Clipper Tools 3</a></nav></nav>, <code><a href="#tanh">Tanh()</a></code></div>
</section>
<section>
<h4><a href="#atn2" class="d-id" id="atn2" title="∞"><code>Atn2()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/trig.c#L329" class="d-so" title="contrib/hbct/trig.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Atn2">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Atn2">in Discussions</a></nav></nav></span>
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<div class="d-ol">Arcus tangent a sine and a cosine argument</div>
<div class="d-d">Syntax</div>
<div class="d-sy"><pre><code>Atn2( nSine, nCosine ) → nRadiant</code></pre></div>
<div class="d-d">Arguments</div>
<div class="d-it"><code>nSine</code> the sine of an angle <code>nCosine</code> the cosine of an angle</div>
<div class="d-d">Returns</div>
<div class="d-it"><code>nRadiant</code> the angle whose tangent is <code>nSine</code>/<code>nCosine</code></div>
<div class="d-d">Description</div>
<div class="d-it">The function <code>Atn2()</code> is an alternate function for calculating the arcus tangent, <code>Atn2( x, y )</code> = <code>Atan( x / y)</code>. It takes two arguments, the sine and the cosine of the angle that should be calculated. Thus, in contrast to the <code><a href="#atan">Atan()</a></code> function, <code>Atn2()</code> can distinguish whether the sine or the cosine has a negative sign (or both being positive or negative), so that the return value can be between <code>-<code><a href="#pi">Pi()</a></code></code> and <code><a href="#pi">Pi()</a></code> and covers the full angle. The return value is given in radiants (full angle equals <code>2 * <code><a href="#pi">Pi()</a></code></code> - see <code><a href="#dtor">DToR()</a></code> if you need to convert it into degrees).</div>
<div class="d-d">Examples</div>
<section class="d-ex"><div class="playground"><pre contenteditable="true" spellcheck="false"><code class="language-c">? Atn2( 0.0, 1.0 ) // --> 0.0
? Atn2( Sqrt( 1 / 2 ), Sqrt( 1 / 2 ) ) // --> Pi() / 4
</code></pre></div></section>
<div class="d-d">Status</div>
<div class="d-it">Ready</div>
<div class="d-d">Compliance</div>
<div class="d-it">CA-Cl*pper v5.x compatible</div>
<div class="d-d">Platforms</div>
<div class="d-it">Available on all platforms</div>
<div class="d-d">File</div>
<div class="d-it">Library is hbct.</div>
<div class="d-d">Tag</div>
<div class="d-it">CT3 math functions</div>
<div class="d-d">See also</div>
<div class="d-it"><nav class="dropdown"><code><a href="#acos">Acos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#acos">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#asin">Asin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#asin">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#atan">Atan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#atan">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#cos">Cos()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cos">Clipper Tools 3</a></nav></nav>, <code><a href="#cosh">Cosh()</a></code>, <nav class="dropdown"><code><a href="#cot">Cot()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#cot">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#dtor">DToR()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#dtor">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#pi">Pi()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#pi">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#rtod">RToD()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#rtod">Clipper Tools 3</a></nav></nav>, <nav class="dropdown"><code><a href="#sin">Sin()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#sin">Clipper Tools 3</a></nav></nav>, <code><a href="#sinh">Sinh()</a></code>, <nav class="dropdown"><code><a href="#tan">Tan()</a></code><nav class="dropdown-content d-dd"><a href="clct3.html#tan">Clipper Tools 3</a></nav></nav>, <code><a href="#tanh">Tanh()</a></code></div>
</section>
<section>
<h4><a href="#ceiling" class="d-id" id="ceiling" title="∞"><code>Ceiling()</code></a><a href="https://github.com/vszakats/hb/blob/096e855/contrib/hbct/ctmath2.c#L94" class="d-so" title="contrib/hbct/ctmath2.c">Source code</a><span class="d-so"><nav class="dropdown d-ebi">🔎<nav class="dropdown-content d-dd"><a href="https://github.com/vszakats/hb/search?type=Code&q=Ceiling">in Repository</a><a href="https://google.com/search?q=site:groups.google.com/d/msg/harbour+Ceiling">in Discussions</a></nav></nav></span>
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<div class="d-ol">Rounds up a number to the next integer</div>
<div class="d-d">Syntax</div>