some date/time/timestamp functions revisited
#1
One thing QB64 and its ancestors lacks, that VB6 and VBA and pretty much all modern languages have, is a native date/time type and associated operations and formatting functions. There are already 16 or so numeric types, so how about one for date/time? 

I started throwing together some basic date/time functions, maybe someone will find this useful.

I'm sure this code could be done more efficiently but it seems to be working OK. There are still some features missing (a standard format date function, epoch-to-string function, count quarter/month/weekday/week, etc.) so this is still a Work in Progress. 

Code: (Select All)
_TITLE "TimeStampFunctions"

' BOOLEAN VALUES
Const FALSE = 0
Const TRUE = Not FALSE

' BASIC PROGRAM METADATA
Dim Shared m_ProgramPath$: m_ProgramPath$ = Left$(Command$(0), _InStrRev(Command$(0), "\"))
Dim Shared m_ProgramName$: m_ProgramName$ = Mid$(Command$(0), _InStrRev(Command$(0), "\") + 1)

' MAKE SCREEN BIG TO FIT A LOT OF TEXT: 1024x768=128cols,48rows and 1280x1024=160cols,64rows
Screen _NewImage(1280, 1024, 32): _ScreenMove 0, 0

' DEMONSTRATION OF DATE/TIME STUFF:
TimeStringToSecondsTest
GetElapsedTimeTest
DateDiffTest

' EXIT
Screen 0
System ' return control to the operating system
End

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN TIMESTAMP FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' /////////////////////////////////////////////////////////////////////////////
' QB64 equivalent of the Visual Basic / VBA DateDiff function.

' See:
' Microsoft > Office VBA Reference > DateDiff function
' https://docs.microsoft.com/en-us/office/vba/language/reference/user-interface-help/datediff-function

' Receives:
' interval$ = String expression that is the interval of time you use
'             to calculate the difference between date1$ and date2$,
'             and can be one of the following values:
'             SETTING   DESCRIPTION   COMMENT
'             -------   -----------   -------------------
'             yyyy      Year          (NOT SUPPORTED YET)
'             q         Quarter       (NOT SUPPORTED YET)
'             m         Month         (NOT SUPPORTED YET)
'             y         Day of year   (NOT SUPPORTED YET)
'             d         Day
'             w         Weekday       (NOT SUPPORTED YET)
'             ww        Week          (NOT SUPPORTED YET)
'             h         Hour
'             n         Minute
'             s         Second
'
' date1##, date2## = Two dates you want to use in the calculation,
'                    in UNIX time (# seconds elapsed since 1/1/1970 12:00:00 AM GMT),
'                    we assume the dates are timezone-corrected.

' Returns an _Float specifying the number of time intervals between
' two specified dates.

Function DateDiff## (interval$, fDate1##, fDate2##)
    Dim fResult As _Float: fResult = 0
    Dim fDiffSeconds As _Float
   
    fDiffSeconds = fDate2## - fDate1##
   
    Select Case interval$
        Case "yyyy":
            ' Year = UNDER CONSTRUCTION
        Case "q":
            ' Quarter = UNDER CONSTRUCTION
        Case "m":
            ' Month = UNDER CONSTRUCTION
        Case "y":
            ' Day of year = UNDER CONSTRUCTION
        Case "d":
            ' Get # of days
            fResult = (fDiffSeconds \ 86400)
        Case "w":
            ' Weekday = UNDER CONSTRUCTION
        Case "ww":
            ' Week = UNDER CONSTRUCTION
        Case "h":
            ' Get # of hours
            fResult = (fDiffSeconds \ 3600)
        Case "n":
            ' get # of minutes
            fResult = (fDiffSeconds \ 60)
        Case "s":
            ' get # of seconds
            fResult = fDiffSeconds
        Case Else:
            ' Unknown
    End Select
   
    DateDiff## = fResult
End Function ' DateDiff##

' /////////////////////////////////////////////////////////////////////////////

Sub DateDiffTest
    Dim in$
    Cls
    Print "Demonstration of Function DateDiff## (interval$, fDate1##, fDate2##)"
    Print "--------------------------------------------------------------------"
    DateDiffTest1 "s", "07-04-2022 12:00:00 PM", "07-04-2022 12:00:45 PM" ' 45s
    DateDiffTest1 "s", "07/04/2022 12:00:00 PM", "07/04/2022 12:00:45 PM" ' 45s
    DateDiffTest1 "s", "07-04-2022 12:00:00", "07-04-2022 12:00:45" ' 45s
    DateDiffTest1 "s", "07/04/2022 12:00:00", "07/04/2022 12:00:45" ' 45s
    Print
    DateDiffTest1 "n", "07-04-2022 12:00:00 PM", "07-04-2022 12:12:34 PM" ' 754s
    DateDiffTest1 "n", "07/04/2022 12:00:00 PM", "07/04/2022 12:12:34 PM" ' 754s
    DateDiffTest1 "n", "07-04-2022 12:00:00", "07-04-2022 12:12:34" ' 754s
    DateDiffTest1 "n", "07/04/2022 12:00:00", "07/04/2022 12:12:34" ' 754s
    Print
    DateDiffTest1 "h", "07-04-2022 12:00:00 PM", "07-04-2022 01:15:43 PM" ' 47743s
    DateDiffTest1 "h", "07/04/2022 12:00:00 PM", "07/04/2022 01:15:43 PM" ' 47743s  1:15:43
    DateDiffTest1 "h", "07-04-2022 12:00:00", "07-04-2022 13:15:43" ' 4543s 1:15:43
    DateDiffTest1 "h", "07/04/2022 12:00:00", "07/04/2022 13:15:43" ' 4543s 1:15:43
    Print
    DateDiffTest1 "d", "07-04-2022 12:00:00 PM", "07-05-2022 01:15:43 PM" ' 134143s
    DateDiffTest1 "d", "07/04/2022 12:00:00 PM", "07/05/2022 01:15:43 PM" ' 134143s 1:15:43
    DateDiffTest1 "d", "07-04-2022 12:00:00", "07-05-2022 13:15:43" ' 94543s 26:15:43
    DateDiffTest1 "d", "07/04/2022 12:00:00", "07/05/2022 13:15:43" ' 94543s 26:15:43
    Input "PRESS ENTER TO CONTINUE"; in$
End Sub ' DateDiffTest

' /////////////////////////////////////////////////////////////////////////////

Sub DateDiffTest1 (interval$, date1$, date2$)
    Dim fDiff As _Float
    Dim sInterval As String
    sInterval = GetTimeIntervalName$(interval$)
    fDiff = DateDiff##(interval$, GetUnixTime##(date1$), GetUnixTime##(date2$))
    Print _
        StrPadLeft$(_Trim$(Str$(fDiff)), 8) + " " + _
        StrPadRight$(sInterval, 7) + " " + _
        "elapsed between " + _
        StrPadRight$(date1$, 22) + " and " + _
        StrPadRight$(date2$, 22)
End Sub ' DateDiffTest1

' /////////////////////////////////////////////////////////////////////////////

Sub DateDiffSanityTest1 (interval$, date1$, date2$)
    Dim fDate1 As _Float
    Dim fDate2 As _Float
    fDate1 = GetUnixTime##(date1$)
    fDate2 = GetUnixTime##(date2$)
    Print StrPadRight$(date1$, 22) + " = " + StrPadRight$(_Trim$(Str$(fDate1)), 12) + " seconds"
    Print StrPadRight$(date2$, 22) + " = " + StrPadRight$(_Trim$(Str$(fDate2)), 12) + " seconds"
    Print StrPadRight$("", 22) + "   " + StrPadRight$(_Trim$(Str$(fDate2 - fDate1)), 12) + " seconds difference"
    Print
End Sub ' DateDiffSanityTest1

' /////////////////////////////////////////////////////////////////////////////
' Receives:
' fSeconds = time period in seconds

' Returns:
' The time period in the format "{days} days, {hours} hours, {minutes} minutes, {seconds} seconds"

' TODO:
' Add support for years, months, weeks

Function GetElapsedTime$ (fElapsedSeconds As _Float)
    Dim sResult As String: sResult = ""
    Dim fSeconds As _Float
    Dim iDays As _Integer64
    Dim iHours As Integer
    Dim iMinutes As Integer
    Dim iSeconds As Integer
    Dim sSign As String
   
    ' Handle negative values
    If Sgn(fElapsedSeconds) = -1 Then
        fSeconds = 0 - fElapsedSeconds
        sSign = "-"
    Else
        fSeconds = fElapsedSeconds
        sSign = ""
    End If
   
    ' Get # of days
    iDays = fSeconds \ 86400
   
    ' Get # of hours
    fSeconds = fSeconds - (iDays * 86400)
    iHours = fSeconds \ 3600
   
    ' get # of minutes
    fSeconds = fSeconds - (iHours * 3600)
    iMinutes = fSeconds \ 60
   
    ' get # of seconds
    fSeconds = fSeconds - (iMinutes * 60)
    iSeconds = Int(fSeconds)
   
    ' Assemble output
    If (iDays > 0) Then sResult = _Trim$(Str$(iDays)) + " days"
    If (iHours > 0) Then sResult = AppendString$(sResult, _Trim$(Str$(iHours)) + " hours", ", ")
    If (iMinutes > 0) Then sResult = AppendString$(sResult, _Trim$(Str$(iMinutes)) + " minutes", ", ")
    If (iSeconds > 0) Then sResult = AppendString$(sResult, _Trim$(Str$(iSeconds)) + " seconds", ", ")
    sResult = sSign + sResult
   
    ' Return result
    GetElapsedTime$ = sResult
End Function ' GetElapsedTime$

' /////////////////////////////////////////////////////////////////////////////
' Based on "Test Steve timeStamp" by SMcNeill & bplus
' https://www.qb64.org/forum/index.php?topic=1638.30
' https://www.qb64.org/forum/index.php?topic=1638.msg108650#msg108650

Sub GetElapsedTimeTest
    ReDim arrDateTime$(-1)
    Dim iLoop1 As Integer
    Dim iLoop2 As Integer
    Dim MyDateTime1$
    Dim MyDateTime2$
    Dim iYear As Integer
    Dim MyDate1$
    Dim MyDate2$
    Dim fSeconds1 As _Float
    Dim fSeconds2 As _Float
    Dim fDiffSeconds As _Float
    Dim in$
   
    Cls
    Print "Demonstration of Function GetElapsedTime$ (fElapsedSeconds As _Float)"
    Print "---------------------------------------------------------------------"
   
    ' TEST DATES
    AppendToStringArray arrDateTime$(), "01-01-0966 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-1815 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-1970 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-2020 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-2020 12:00:00 AM"
    AppendToStringArray arrDateTime$(), "01-01-2020 12:00:00 PM"
    AppendToStringArray arrDateTime$(), "01-01-2020 01:00:00 PM"
    AppendToStringArray arrDateTime$(), "01-01-2020 11:59:59 PM"
    AppendToStringArray arrDateTime$(), "01-02-2020 12:00:00 AM"
    AppendToStringArray arrDateTime$(), "07-27-2022 12:00:00 PM"
    AppendToStringArray arrDateTime$(), "07-27-2022 06:00:00 PM"
    AppendToStringArray arrDateTime$(), "07-28-2022 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-2023 00:00:00"
    AppendToStringArray arrDateTime$(), "01-01-2525 00:00:00"
   
    ' GET CURRENT DATE/TIME
    MyDateTime1$ = GetCurrentDateTime$("{mm}/{dd}/{yyyy} {hh}:{nn}:{ss} {ampm}")
    fSeconds1 = GetUnixTime##(MyDateTime1$)
    Print "Current date/time is " + MyDateTime1$ + " = " + _Trim$(Str$(fSeconds1)) + " seconds"
    Print
   
    ' COMPARE TEST DATES
    For iLoop1 = LBound(arrDateTime$) To UBound(arrDateTime$)
        MyDateTime2$ = arrDateTime$(iLoop1)
        fSeconds2 = GetUnixTime##(MyDateTime2$)
        fDiffSeconds = fSeconds1 - fSeconds2
       
        Print _
            StrPadRight$(MyDateTime1$, 22) + _
            " - " + _
            StrPadRight$(MyDateTime2$, 22) + _
            " = " + _
            StrPadRight$(_Trim$(Str$(fSeconds1)), 12) + "s" + _
            " - " + _
            StrPadRight$(_Trim$(Str$(fSeconds2)), 12) + "s" + _
            " = " + _
            StrPadRight$(_Trim$(Str$(fDiffSeconds)), 12) + "s" + _
            " = " + _
            GetElapsedTime$(fDiffSeconds)
    Next iLoop1
   
    Input "PRESS ENTER TO CONTINUE"; in$
End Sub ' GetElapsedTimeTest

' /////////////////////////////////////////////////////////////////////////////

Function GetTimeIntervalName$ (interval$)
    Dim sInterval As String
    Select Case interval$
        Case "yyyy":
            sInterval = "years"
        Case "q":
            sInterval = "quarters"
        Case "m":
            sInterval = "months"
        Case "y":
            sInterval = "days of the year"
        Case "d":
            sInterval = "days"
        Case "w":
            sInterval = "weekdays"
        Case "ww":
            sInterval = "weeks"
        Case "h":
            sInterval = "hours"
        Case "n":
            sInterval = "minutes"
        Case "s":
            sInterval = "seconds"
        Case Else:
            sInterval = "unknown units"
    End Select
    GetTimeIntervalName$ = sInterval
End Function ' GetTimeIntervalName$

' /////////////////////////////////////////////////////////////////////////////
' Based on "Test Steve timeStamp" by SMcNeill & bplus
' https://www.qb64.org/forum/index.php?topic=1638.30
' https://www.qb64.org/forum/index.php?topic=1638.msg108650#msg108650

' Receives:
' MyDate$ can be date or date+time, in any of the following formats:
' 12-hour time:
' 01-01-2020 11:59:59 PM
' 01/01/2020 11:59:59 PM
' 24-hour time:
' 01-01-2020 23:59:59
' 01/01/2020 23:59:59

' TODO: create the inverse function, receives epoch and returns a formatted date string.

Function GetUnixTime## (sDate$)
    Dim iPos1 As Integer
    Dim iPos2 As Integer
    Dim iMonth As Integer
    Dim iDay As Integer
    Dim iYear As Integer
    Dim iLoop1 As Integer
    Dim fDateSeconds As _Float
    Dim MyDate$
    Dim sTime$
    Dim fTimeSeconds As _Float ' MyTime##
    Dim fTotalSeconds As _Float: fTotalSeconds = 0
   
    ' Do we have date+time or just date?
    ' Look at sDate$:
    ' e.g. 01-01-2020 11:59:59 PM
    '      1234567890123456789012
    '                 10987654321
    If Len(sDate$) > 19 Then
        ' Date + time, 12-hour time
        sTime$ = Right$(sDate$, Len(sDate$) - 11)
        fTimeSeconds = TimeStringToSeconds##(sTime$)
        MyDate$ = Left$(sDate$, 10)
    ElseIf Len(sDate$) > 10 Then
        ' Date + time, 24-hour time
        sTime$ = Right$(sDate$, Len(sDate$) - 11)
        fTimeSeconds = TimeStringToSeconds##(sTime$)
        MyDate$ = Left$(sDate$, 10)
    Else
        ' Just a date, assume time=12:00:00 AM
        fTimeSeconds = 0
        MyDate$ = sDate$
    End If
    MyDate$ = Replace$(MyDate$, "/", "-")
   
    ' Get seconds for date
    iPos1 = InStr(MyDate$, "-")
    iPos2 = InStr(iPos1 + 1, MyDate$, "-")
    iMonth = Val(Left$(MyDate$, iPos1))
    iDay = Val(Mid$(MyDate$, iPos1 + 1))
    iYear = Val(Mid$(MyDate$, iPos2 + 1))
   
    If iYear < 1970 Then
        ' CALCULATE SHE-IT BACKWARDS
        Select Case iMonth ' turn the day backwards for the month
            Case 1, 3, 5, 7, 8, 10, 12: iDay = 31 - iDay ' 31 days
            Case 2: iDay = 28 - iDay ' special 28 or 29.
            Case 4, 6, 9, 11: iDay = 30 - iDay ' 30 days
        End Select
       
        If iYear Mod 4 = 0 And iMonth < 3 Then ' check for normal leap year, and we're before it...
            iDay = iDay + 1 ' assume we had a leap year, subtract another day
            If iYear Mod 100 = 0 And iYear Mod 400 <> 0 Then iDay = iDay - 1 ' not a leap year if year is divisible by 100 and not 400
        End If
       
        ' then count the months that passed after the current month
        For iLoop1 = iMonth + 1 To 12
            Select Case iLoop1
                Case 2: iDay = iDay + 28
                Case 3, 5, 7, 8, 10, 12: iDay = iDay + 31
                Case 4, 6, 9, 11: iDay = iDay + 30
            End Select
        Next iLoop1
       
        ' we should now have the entered year calculated.  Now lets add in for each year from this point to 1970
        iDay = iDay + 365 * (1969 - iYear) ' 365 days per each standard year
       
        For iLoop1 = 1968 To iYear + 1 Step -4 ' from 1968 onwards,backwards, skipping the current year (which we handled previously in the FOR loop)
            iDay = iDay + 1 ' subtract an extra day every leap year
            If (iLoop1 Mod 100) = 0 And (iLoop1 Mod 400) <> 0 Then iDay = iDay - 1 ' but skipping every year divisible by 100, but not 400
        Next iLoop1
       
        fDateSeconds = iDay * 24 * 60 * 60 ' Seconds are days * 24 hours * 60 minutes * 60 seconds
        fTotalSeconds = -(fDateSeconds + 24 * 60 * 60 - fTimeSeconds)
        'fDateSeconds = -(fDateSeconds + 24 * 60 * 60)
        'Exit Function
    Else
        ' CALCULATE FORWARD
        iYear = iYear - 1970
        For iLoop1 = 1 To iMonth ' for this year,
            Select Case iLoop1 ' Add the number of days for each previous month passed
                Case 1: iDay = iDay ' January doestn't have any carry over days.
                Case 2, 4, 6, 8, 9, 11: iDay = iDay + 31
                Case 3 ' Feb might be a leap year
                    If (iYear Mod 4) = 2 Then ' if this year is divisible by 4 (starting in 1972)
                        iDay = iDay + 29 ' its a leap year
                        If (iYear Mod 100) = 30 And (iYear Mod 400) <> 30 Then ' unless..
                            iDay = iDay - 1 ' the year is divisible by 100, and not divisible by 400
                        End If
                    Else ' year not divisible by 4, no worries
                        iDay = iDay + 28
                    End If
                Case 5, 7, 10, 12: iDay = iDay + 30
            End Select
        Next iLoop1
       
        iDay = (iDay - 1) + 365 * iYear ' current month days passed + 365 days per each standard year
       
        For iLoop1 = 2 To iYear - 1 Step 4 ' from 1972 onwards, skipping the current year (which we handled previously in the FOR loopp)
            iDay = iDay + 1 ' add an extra day every leap year
            If (iLoop1 Mod 100) = 30 And (iLoop1 Mod 400) <> 30 Then iDay = iDay - 1 ' but skiping every year divisible by 100, but not 400
        Next iLoop1
       
        fDateSeconds = iDay * 24 * 60 * 60 ' Seconds are days * 24 hours * 60 minutes * 60 seconds
       
        fTotalSeconds = fDateSeconds + fTimeSeconds
    End If
   
    GetUnixTime## = fTotalSeconds
End Function ' GetUnixTime##

' /////////////////////////////////////////////////////////////////////////////
' mod from Pete's calendar this is a very clear calc

' From "Test Steve timeStamp" by SMcNeill & bplus
' https://www.qb64.org/forum/index.php?topic=1638.30
' https://www.qb64.org/forum/index.php?topic=1638.msg108650#msg108650

Function IsLeapYear% (yr)
    Dim bResult%: bResult% = FALSE
    If yr Mod 4 = 0 Then
        If yr Mod 100 = 0 Then
            If yr Mod 400 = 0 Then
                bResult% = TRUE
            End If
        Else
            bResult% = TRUE
        End If
    End If
    IsLeapYear% = bResult%
End Function ' IsLeapYear%

' /////////////////////////////////////////////////////////////////////////////
' Convert time string to seconds.

' Receives a time string in the format:
' {hh}:[mm}:{ss} {AM/PM}

' If the string contains "AM" or "PM" then it is treated as 12-hour time,
' else it is treated as 24-hour (military) time.

' Counts up the number of seconds from midnight until that time,
' and returns it as type Float.

' TODO:
' * First remove all non-numeric characters, except AM or PM on the right,
'   so that we can parse dates with other separators, like "12.25.2003".
' * Create the inverse function "SecondsToTimeString$".
' * Create a date/time type with all the standard Date operations.

Function TimeStringToSeconds## (sTime$)
    Dim sHH$: sHH$ = Left$(sTime$, 2)
    Dim sNN$: sNN$ = Mid$(sTime$, 4, 2)
    Dim sSS$: sSS$ = Mid$(sTime$, 7, 2)
    Dim fSeconds##: fSeconds## = 0
   
    ' MAKE SURE VALUES ARE NUMBERS
    If (IsNum%(sHH$) = TRUE) And (IsNum%(sNN$) = TRUE) And (IsNum%(sSS$) = TRUE) Then
        ' IF TIME CONTAINS AM/PM, USE 12-HOUR TIME, ELSE 24-HOUR
        If InStr(UCase$(sTime$), "AM") > 0 Then
            ' 12-HOUR TIME, A.M.
            'Print "Ante-meridian!"
            If Val(sHH$) = 12 Then
                ' Hour is zero for 12 A.M.
                'Print "12 A.M., that's zero for hours"
                fSeconds## = (Val(sNN$) * 60) + Val(sSS$)
            Else
                ' Count hour normally
                'Print "Between 1 A.M. and 11:59:59 A.M."
                fSeconds## = (Val(sHH$) * 3600) + (Val(sNN$) * 60) + Val(sSS$)
            End If
        ElseIf InStr(UCase$(sTime$), "PM") > 0 Then
            ' 12-HOUR TIME, P.M.
            ' Unless it is noon, add 12 hours.
            If Val(sHH$) = 12 Then
                ' Count hour normally
                'Print "12 noon. Leave hours alone."
                fSeconds## = (Val(sHH$) * 3600) + (Val(sNN$) * 60) + Val(sSS$)
            Else
                ' Add 12 hours.
                'Print "Post-meridian but not noon. Add 12 hours."
                fSeconds## = ((Val(sHH$) + 12) * 3600) + (Val(sNN$) * 60) + Val(sSS$)
            End If
        Else
            ' 24-HOUR TIME
            'Print "24 hours, boys!!"
            fSeconds## = (Val(sHH$) * 3600) + (Val(sNN$) * 60) + Val(sSS$)
        End If
        'Else
        '    Print "Something's not right"
        '    Print "(IsNum%(sHH$) = " + _Trim$(Str$(IsNum%(sHH$))) + ", sHH$=" + chr$(34) + sHH$ + chr$(34)
        '    Print "(IsNum%(sNN$) = " + _Trim$(Str$(IsNum%(sNN$))) + ", sNN$=" + chr$(34) + sNN$ + chr$(34)
        '    Print "(IsNum%(sSS$) = " + _Trim$(Str$(IsNum%(sSS$))) + ", sSS$=" + chr$(34) + sSS$ + chr$(34)
    End If
   
    ' RETURN RESULT
    TimeStringToSeconds## = fSeconds##
   
End Function ' TimeStringToSeconds##

' /////////////////////////////////////////////////////////////////////////////

Sub TimeStringToSecondsTest
    ReDim arrTime$(0 To 17)
    Dim iLoop%
    Dim in$
    arrTime$(0) = "00:00:00"
    arrTime$(1) = "12:00:00 AM"
    arrTime$(2) = "01:00:00"
    arrTime$(3) = "01:00:00 AM"
    arrTime$(4) = "01:02:00 AM"
    arrTime$(5) = "01:02:34 AM"
    arrTime$(6) = "02:00:00"
    arrTime$(7) = "02:00:00 AM"
    arrTime$(8) = "02:02:00 AM"
    arrTime$(9) = "02:02:34 AM"
    arrTime$(10) = "01:00:00 PM"
    arrTime$(11) = "01:02:00 PM"
    arrTime$(12) = "01:02:34 PM"
    arrTime$(13) = "13:00:00"
    arrTime$(14) = "13:01:00"
    arrTime$(15) = "13:01:34"
    arrTime$(16) = "23:59:59"
    arrTime$(17) = "11:59:59 PM"
    Cls
    Print "Demonstration of Function TimeStringToSeconds## (sTime$)"
    Print "--------------------------------------------------------"
    For iLoop% = LBound(arrTime$) To UBound(arrTime$)
        Print "Time " + Chr$(34) + arrTime$(iLoop%) + Chr$(34) + " = " + _Trim$(Str$(TimeStringToSeconds##(arrTime$(iLoop%)))) + " seconds."
    Next iLoop%
    Input "PRESS ENTER TO CONTINUE"; in$
End Sub ' TimeStringToSecondsTest

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END TIMESTAMP FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN GENERAL PURPOSE ROUTINES #GEN
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' /////////////////////////////////////////////////////////////////////////////

Function AppendString$ (MyString As String, NewString As String, MyDelimiter As String)
    Dim sResult As String: sResult = MyString
    If Len(MyString) > 0 Then
        sResult = sResult + MyDelimiter
    End If
    sResult = sResult + NewString
    AppendString$ = sResult
End Function ' AppendString$

' /////////////////////////////////////////////////////////////////////////////

Sub AppendToStringArray (MyStringArray$(), MyString$)
    ReDim _Preserve MyStringArray$(LBound(MyStringArray$) To UBound(MyStringArray$) + 1)
    MyStringArray$(UBound(MyStringArray$)) = MyString$
End Sub ' AppendToStringArray

' /////////////////////////////////////////////////////////////////////////////
' See also StringTo2dArray

Function Array2dToString$ (MyArray() As String)
    Dim MyString As String
    Dim iY As Integer
    Dim iX As Integer
    Dim sLine As String
    MyString = ""
    For iY = LBound(MyArray, 1) To UBound(MyArray, 1)
        sLine = ""
        For iX = LBound(MyArray, 2) To UBound(MyArray, 2)
            sLine = sLine + MyArray(iY, iX)
        Next iX
        MyString = MyString + sLine + Chr$(13)
    Next iY
    Array2dToString$ = MyString
End Function ' Array2dToString$

' /////////////////////////////////////////////////////////////////////////////

'Function Array2dToStringTest$ (MyArray() As String)
'    Dim MyString As String
'    Dim iY As Integer
'    Dim iX As Integer
'    Dim sLine As String
'    MyString = ""
'    MyString = MyString + "           11111111112222222222333" + Chr$(13)
'    MyString = MyString + "  12345678901234567890123456789012" + Chr$(13)
'    For iY = LBound(MyArray, 1) To UBound(MyArray, 1)
'        sLine = ""
'        sLine = sLine + Right$("  " + cstr$(iY), 2)
'        For iX = LBound(MyArray, 2) To UBound(MyArray, 2)
'            sLine = sLine + MyArray(iY, iX)
'        Next iX
'        sLine = sLine + Right$("  " + cstr$(iY), 2)
'        MyString = MyString + sLine + Chr$(13)
'    Next iY
'    MyString = MyString + "  12345678901234567890123456789012" + Chr$(13)
'    MyString = MyString + "           11111111112222222222333" + Chr$(13)
'    Array2dToStringTest$ = MyString
'End Function ' Array2dToStringTest$

' /////////////////////////////////////////////////////////////////////////////
' Convert a value to string and trim it (because normal Str$ adds spaces)

Function cstr$ (myValue)
    'cstr$ = LTRIM$(RTRIM$(STR$(myValue)))
    cstr$ = _Trim$(Str$(myValue))
End Function ' cstr$

'' /////////////////////////////////////////////////////////////////////////////
'' Convert a Long value to string and trim it (because normal Str$ adds spaces)
'
'Function cstrl$ (myValue As Long)
'    cstrl$ = _Trim$(Str$(myValue))
'End Function ' cstrl$
'
'' /////////////////////////////////////////////////////////////////////////////
'' Convert a Single value to string and trim it (because normal Str$ adds spaces)
'
'Function cstrs$ (myValue As Single)
'    ''cstr$ = LTRIM$(RTRIM$(STR$(myValue)))
'    cstrs$ = _Trim$(Str$(myValue))
'End Function ' cstrs$
'
'' /////////////////////////////////////////////////////////////////////////////
'' Convert an unsigned Long value to string and trim it (because normal Str$ adds spaces)
'
'Function cstrul$ (myValue As _Unsigned Long)
'    cstrul$ = _Trim$(Str$(myValue))
'End Function ' cstrul$

' /////////////////////////////////////////////////////////////////////////////
' Simple timestamp function

Function CurrentDateTime$
    CurrentDateTime$ = Mid$(Date$, 7, 4) + "-" + _
        Mid$(Date$, 1, 5) + " " + _
        Time$
End Function ' CurrentDateTime$

' /////////////////////////////////////////////////////////////////////////////
' TODO: verify this works

' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

Function DblToStr$ (n#)
    value$ = UCase$(LTrim$(Str$(n#)))
    Xpos% = InStr(value$, "D") + InStr(value$, "E") 'only D or E can be present
    If Xpos% Then
        expo% = Val(Mid$(value$, Xpos% + 1))
        If Val(value$) < 0 Then
            sign$ = "-": valu$ = Mid$(value$, 2, Xpos% - 2)
        Else valu$ = Mid$(value$, 1, Xpos% - 1)
        End If
        dot% = InStr(valu$, "."): L% = Len(valu$)
        If expo% > 0 Then add$ = String$(expo% - (L% - dot%), "0")
        If expo% < 0 Then min$ = String$(Abs(expo%) - (dot% - 1), "0"): DP$ = "."
        For n = 1 To L%
            If Mid$(valu$, n, 1) <> "." Then num$ = num$ + Mid$(valu$, n, 1)
        Next
    Else DblToStr$ = value$: Exit Function
    End If
    DblToStr$ = _Trim$(sign$ + DP$ + min$ + num$ + add$)
End Function ' DblToStr$

' /////////////////////////////////////////////////////////////////////////////
' Receives an {sDelim} delimited list {sInput}
' returns the list with all duplicate entries removed.

Function DedupeDelimList$ (sInput As String, sDelim As String)
    ReDim arrLines(-1) As String
    Dim sOutput As String
    Dim iLoop As Integer

    split sInput, sDelim, arrLines()
    sOutput = sDelim
    For iLoop = LBound(arrLines) To UBound(arrLines)
        If InStr(1, sOutput, sDelim + arrLines(iLoop) + sDelim) = 0 Then
            sOutput = sOutput + arrLines(iLoop) + sDelim
        End If
    Next iLoop

    DedupeDelimList$ = sOutput
End Function ' DedupeDelimList$

' /////////////////////////////////////////////////////////////////////////////
' SMcNeill
' More efficient version of ExtendedTimer.
' This stores our day values and only updates them when necessary.
' We really don't need to figure out how many seconds are in today over and over endlessly
' -- just count them once, and when the clock swaps back to 0:0:0, add 24*60*60 seconds to the count.
' Re: how to time something (ie do loop for n seconds)
' https://forum.qb64.org/index.php?topic=4682.0

Function ExtendedTimer##
    'modified extendedtimer to store the old day's count, and not have to recalculate it every time the routine is called.

    Static olds As _Float, old_day As _Float
    Dim m As Integer, d As Integer, y As Integer
    Dim s As _Float, day As String
    If olds = 0 Then 'calculate the day the first time the extended timer runs
        day = Date$
        m = Val(Left$(day, 2))
        d = Val(Mid$(day, 4, 2))
        y = Val(Right$(day, 4)) - 1970
        Select Case m 'Add the number of days for each previous month passed
            Case 2: d = d + 31
            Case 3: d = d + 59
            Case 4: d = d + 90
            Case 5: d = d + 120
            Case 6: d = d + 151
            Case 7: d = d + 181
            Case 8: d = d + 212
            Case 9: d = d + 243
            Case 10: d = d + 273
            Case 11: d = d + 304
            Case 12: d = d + 334
        End Select
        If (y Mod 4) = 2 And m > 2 Then d = d + 1 'add a day if this is leap year and we're past february
        d = (d - 1) + 365 * y 'current month days passed + 365 days per each standard year
        d = d + (y + 2) \ 4 'add in days for leap years passed
        s = d * 24 * 60 * 60 'Seconds are days * 24 hours * 60 minutes * 60 seconds
        old_day = s
    End If
    If Timer < oldt Then 'we went from 23:59:59 (a second before midnight) to 0:0:0 (midnight)
        old_day = s + 83400 'add another worth of seconds to our counter
    End If
    oldt = Timer
    olds = old_day + oldt
    ExtendedTimer## = olds
End Function ' ExtendedTimer##

' /////////////////////////////////////////////////////////////////////////////
' TODO: find the newer formatting function?

Function FormatNumber$ (myValue, iDigits As Integer)
    Dim strValue As String
    strValue = DblToStr$(myValue) + String$(iDigits, " ")
    If myValue < 1 Then
        If myValue < 0 Then
            strValue = Replace$(strValue, "-.", "-0.")
        ElseIf myValue > 0 Then
            strValue = "0" + strValue
        End If
    End If
    FormatNumber$ = Left$(strValue, iDigits)
End Function ' FormatNumber$

' /////////////////////////////////////////////////////////////////////////////
' From: Bitwise Manipulations By Steven Roman
' http://www.romanpress.com/Articles/Bitwise_R/Bitwise.htm

' Returns the 8-bit binary representation
' of an integer iInput where 0 <= iInput <= 255

Function GetBinary$ (iInput1 As Integer)
    Dim sResult As String
    Dim iLoop As Integer
    Dim iInput As Integer: iInput = iInput1

    sResult = ""

    If iInput >= 0 And iInput <= 255 Then
        For iLoop = 1 To 8
            sResult = LTrim$(RTrim$(Str$(iInput Mod 2))) + sResult
            iInput = iInput \ 2
            'If iLoop = 4 Then sResult = " " + sResult
        Next iLoop
    End If

    GetBinary$ = sResult
End Function ' GetBinary$

' /////////////////////////////////////////////////////////////////////////////
' wonderfully inefficient way to read if a bit is set
' ival = GetBit256%(int we are comparing, int containing the bits we want to read)

' See also: GetBit256%, SetBit256%

Function GetBit256% (iNum1 As Integer, iBit1 As Integer)
    Dim iResult As Integer
    Dim sNum As String
    Dim sBit As String
    Dim iLoop As Integer
    Dim bContinue As Integer
    'DIM iTemp AS INTEGER
    Dim iNum As Integer: iNum = iNum1
    Dim iBit As Integer: iBit = iBit1

    iResult = FALSE
    bContinue = TRUE

    If iNum < 256 And iBit <= 128 Then
        sNum = GetBinary$(iNum)
        sBit = GetBinary$(iBit)
        For iLoop = 1 To 8
            If Mid$(sBit, iLoop, 1) = "1" Then
                'if any of the bits in iBit are false, return false
                If Mid$(sNum, iLoop, 1) = "0" Then
                    iResult = FALSE
                    bContinue = FALSE
                    Exit For
                End If
            End If
        Next iLoop
        If bContinue = TRUE Then
            iResult = TRUE
        End If
    End If

    GetBit256% = iResult
End Function ' GetBit256%

' /////////////////////////////////////////////////////////////////////////////
' Returns the text character at positon x%, y%

' Does the same as:
'   Locate y%, x%
'   GetCharXY% = Screen(CsrLin, Pos(0))

' See also: GetColorXY&

Function GetCharXY% (x%, y%)
    GetCharXY% = Screen(y%, x%, 0) ' when 3rd parameter = 0 returns character code
End Function ' GetCharXY%

' /////////////////////////////////////////////////////////////////////////////
' Returns the text color at positon x%, y%

' See also: GetCharXY%

Function GetColorXY& (x%, y%)
    GetColorXY& = Screen(y%, x%, 1) ' when 3rd parameter = 1 returns character color
End Function ' GetColorXY

' /////////////////////////////////////////////////////////////////////////////
' Simple timestamp function
' Format: {YYYY}-{MM}-{DD} {hh}:[mm}:{ss}

' Uses:
'     TIME$
'         The TIME$ Function returns a STRING representation
'         of the current computer time in a 24 hour format.
'         https://qb64phoenix.com/qb64wiki/index.php/TIME$
'     DATE$
'         The DATE$ function returns the current computer date
'         as a string in the format "mm-dd-yyyy".
'         https://qb64phoenix.com/qb64wiki/index.php/DATE$
'
' TODO: support template where
'       {yyyy} = 4 digit year
'       {mm}   = 2 digit month
'       {dd}   = 2 digit day
'       {hh}   = 2 digit hour (12-hour)
'       {rr}   = 2 digit hour (24-hour)
'       {nn}   = 2 digit minute
'       {ss}   = 2 digit second
'       {ampm} = AM/PM

' We got the nn for minute from Microsoft > Office VBA Reference > DateDiff function
' https://docs.microsoft.com/en-us/office/vba/language/reference/user-interface-help/datediff-function

' PRINT "Current date time (simple format) = " + Chr$(34) + GetCurrentDateTime$("{yyyy}-{mm}-{dd} {rr}:{nn}:{ss}") + Chr$(34)
' PRINT "Current date time (US format)     = " + Chr$(34) + GetCurrentDateTime$("{mm}/{dd}/{yyyy} {hh}:{nn}:{ss} {ampm}") + Chr$(34)
' PRINT "Filename timestamp                = " + Chr$(34) + GetCurrentDateTime$("{yyyy}{mm}{dd}_{rr}{nn}{ss}") + Chr$(34)

Function GetCurrentDateTime$ (sTemplate$)
    Dim sDate$: sDate$ = Date$
    Dim sTime$: sTime$ = Time$
    Dim sYYYY$: sYYYY$ = Mid$(sDate$, 7, 4)
    Dim sMM$: sMM$ = Mid$(sDate$, 1, 2)
    Dim sDD$: sDD$ = Mid$(sDate$, 4, 2)
    Dim sHH24$: sHH24$ = Mid$(sTime$, 1, 2)
    Dim sHH$: sHH$ = ""
    Dim sMI$: sMI$ = Mid$(sTime$, 4, 2)
    Dim sSS$: sSS$ = Mid$(sTime$, 7, 2)
    Dim iHour%: iHour% = Val(sHH24$)
    Dim sAMPM$: sAMPM$ = ""
    Dim result$: result$ = ""

    ' FIGURE OUT AM/PM
    If InStr(sTemplate$, "{ampm}") > 0 Then
        If iHour% = 0 Then
            sAMPM$ = "AM"
            iHour% = 12
        ElseIf iHour% > 0 And iHour% < 12 Then
            sAMPM$ = "AM"
        ElseIf iHour% = 12 Then
            sAMPM$ = "PM"
        Else
            sAMPM$ = "PM"
            iHour% = iHour% - 12
        End If
        sHH$ = Right$("00" + _Trim$(Str$(iHour%)), 2)
    End If

    ' POPULATE TEMPLATE
    result$ = sTemplate$
    result$ = Replace$(result$, "{yyyy}", sYYYY$)
    result$ = Replace$(result$, "{mm}", sMM$)
    result$ = Replace$(result$, "{dd}", sDD$)
    result$ = Replace$(result$, "{hh}", sHH$)
    result$ = Replace$(result$, "{rr}", sHH24$)
    result$ = Replace$(result$, "{nn}", sMI$)
    result$ = Replace$(result$, "{ss}", sSS$)
    result$ = Replace$(result$, "{ampm}", sAMPM$)

    ' RETURN RESULT
    GetCurrentDateTime$ = result$
End Function ' GetCurrentDateTime$

' /////////////////////////////////////////////////////////////////////////////
' From: Bitwise Manipulations By Steven Roman
' http://www.romanpress.com/Articles/Bitwise_R/Bitwise.htm

' Returns the integer that corresponds to a binary string of length 8

Function GetIntegerFromBinary% (sBinary1 As String)
    Dim iResult As Integer
    Dim iLoop As Integer
    Dim strBinary As String
    Dim sBinary As String: sBinary = sBinary1

    iResult = 0
    strBinary = Replace$(sBinary, " ", "") ' Remove any spaces
    For iLoop = 0 To Len(strBinary) - 1
        iResult = iResult + 2 ^ iLoop * Val(Mid$(strBinary, Len(strBinary) - iLoop, 1))
    Next iLoop

    GetIntegerFromBinary% = iResult
End Function ' GetIntegerFromBinary%

' /////////////////////////////////////////////////////////////////////////////
' Receives a {sDelimeter} delimited list of numbers {MyString}
' and splits it up into an integer array arrInteger()
' beginning at index {iMinIndex}.

Sub GetIntegerArrayFromDelimList (MyString As String, sDelimiter As String, iMinIndex As Integer, arrInteger() As Integer)
    ReDim arrString(-1) As String
    Dim CleanString As String
    Dim iLoop As Integer
    Dim iCount As Integer: iCount = iMinIndex - 1

    ReDim arrInteger(-1) As Integer

    'DebugPrint "GetIntegerArrayFromDelimList " + _
    '    "MyString=" + chr$(34) + MyString + chr$(34) + ", " + _
    '    "sDelimiter=" + chr$(34) + sDelimiter + chr$(34) + ", " + _
    '    "iMinIndex=" + cstr$(iMinIndex) + ", " + _
    '    "arrInteger()"


    If Len(sDelimiter) > 0 Then
        CleanString = MyString
        If sDelimiter <> " " Then
            CleanString = Replace$(CleanString, " ", "")
        End If

        split CleanString, sDelimiter, arrString()
        iCount = iMinIndex - 1
        For iLoop = LBound(arrString) To UBound(arrString)
            If IsNum%(arrString(iLoop)) = TRUE Then
                iCount = iCount + 1
                ReDim _Preserve arrInteger(iMinIndex To iCount) As Integer
                arrInteger(iCount) = Val(arrString(iLoop))
                'DebugPrint "5633 arrInteger(" + cstr$(iCount) + ") = VAL(arrString(" + cstr$(iLoop) + ")) = " + cstr$(arrInteger(iCount))

            End If
        Next iLoop
    Else
        If IsNum%(MyString) = TRUE Then
            ReDim _Preserve arrInteger(iMinIndex To iMinIndex) As Integer
            arrInteger(iMinIndex) = Val(MyString)
        End If
    End If

    'CleanString=""
    'for iLoop=lbound(arrInteger) to ubound(arrInteger)
    'CleanString = CleanString + iifstr$(iLoop=lbound(arrInteger), "", ",") + cstr$(arrInteger(iLoop))
    'next iLoop
    'DebugPrint "arrInteger=(" + CleanString + ")"
End Sub ' GetIntegerArrayFromDelimList

' /////////////////////////////////////////////////////////////////////////////
' IIF function for QB for integers

Function IIF (Condition, IfTrue, IfFalse)
    If Condition Then IIF = IfTrue Else IIF = IfFalse
End Function

' /////////////////////////////////////////////////////////////////////////////
' IIF function for QB for strings

Function IIFSTR$ (Condition, IfTrue$, IfFalse$)
    If Condition Then IIFSTR$ = IfTrue$ Else IIFSTR$ = IfFalse$
End Function

' /////////////////////////////////////////////////////////////////////////////

Function IntPadLeft$ (iValue As Integer, iWidth As Integer)
    IntPadLeft$ = Right$(String$(iWidth, " ") + _Trim$(Str$(iValue)), iWidth)
End Function ' IntPadLeft$

' /////////////////////////////////////////////////////////////////////////////

Function IntPadRight$ (iValue As Integer, iWidth As Integer)
    IntPadRight$ = Left$(_Trim$(Str$(iValue)) + String$(iWidth, " "), iWidth)
End Function ' IntPadRight$

' /////////////////////////////////////////////////////////////////////////////
' Returns TRUE if number n is even
' https://slaystudy.com/qbasic-program-to-check-if-number-is-even-or-odd/

Function IsEven% (n)
    If n Mod 2 = 0 Then
        IsEven% = TRUE
    Else
        IsEven% = FALSE
    End If
End Function ' IsEven%

' /////////////////////////////////////////////////////////////////////////////
' Returns TRUE if number n is odd
' https://slaystudy.com/qbasic-program-to-check-if-number-is-even-or-odd/

Function IsOdd% (n)
    If n Mod 2 = 1 Then
        IsOdd% = TRUE
    Else
        IsOdd% = FALSE
    End If
End Function ' IsOdd%

' /////////////////////////////////////////////////////////////////////////////
' Returns TRUE if value text$ is numeric.

Function IsNum% (text$)
    IsNum% = IsNumber%(text$)
End Function ' IsNum%

'' NOTE: THIS FAILS FOR NUMBERS LIKE "002" AND "2.000":
'Function IsNum% (text$)
'    Dim a$
'    Dim b$
'    a$ = _Trim$(text$)
'    b$ = _Trim$(Str$(Val(text$)))
'    If a$ = b$ Then
'        IsNum% = TRUE
'    Else
'        IsNum% = FALSE
'    End If
'End Function ' IsNum%

' /////////////////////////////////////////////////////////////////////////////
' Returns TRUE if value OriginalString$ is numeric.

' Re: Does a Is Number function exist in QB64?
' https://www.qb64.org/forum/index.php?topic=896.15

' Version 2 by madscijr
' Returns TRUE (-1) if string is an integer, FALSE (0) if not

' Version 1 by MWheatley
' Reply #18 on: January 01, 2019, 11:24:30 AM
' returns 1 if string is an integer, 0 if not

Function IsNumber% (OriginalString$)
    Dim bResult%: bResult% = FALSE
    Dim iLoop%
    Dim TestString$
    'Dim bNegative%
    Dim iDecimalCount%
    Dim sNextChar$
   
    'THEY SHOULD TRIM OUTSIDE THE FUNCTION!
    'TestString$ = _TRIM$(OriginalString$)
   
    If Len(OriginalString$) > 0 Then
        TestString$ = ""
        If Left$(OriginalString$, 1) = "+" Then
            TestString$ = Right$(OriginalString$, Len(OriginalString$) - 1)
            'bNegative% = FALSE
        ElseIf Left$(OriginalString$, 1) = "-" Then
            TestString$ = Right$(OriginalString$, Len(OriginalString$) - 1)
            'bNegative% = TRUE
        Else
            TestString$ = OriginalString$
            'bNegative% = FALSE
        End If
        If Len(TestString$) > 0 Then
            bResult% = TRUE
            iDecimalCount% = 0
            For iLoop% = 1 To Len(TestString$)
                sNextChar$ = Mid$(TestString$, iLoop%, 1)
                If sNextChar$ = "." Then
                    iDecimalCount% = iDecimalCount% + 1
                    If iDecimalCount% > 1 Then
                        ' TOO MANY DECIMAL POINTS, INVALID!
                        bResult% = FALSE
                        Exit For
                    End If
                ElseIf Asc(sNextChar$) < 48 Or Asc(sNextChar$) > 57 Then
                    ' NOT A NUMERAL OR A DECIMAL, INVALID!
                    bResult% = FALSE
                    Exit For
                End If
            Next iLoop%
        End If
    End If
    IsNumber% = bResult%
End Function ' IsNumber%

' /////////////////////////////////////////////////////////////////////////////

'Sub IsNumberTest
'    Dim in$
'    Cls
'    IsNumberTest1 "1"
'    IsNumberTest1 "01"
'    IsNumberTest1 "001"
'    IsNumberTest1 "-1"
'    IsNumberTest1 "-01"
'    IsNumberTest1 "-001"
'    IsNumberTest1 "+1"
'    IsNumberTest1 "+01"
'    IsNumberTest1 "+001"
'    IsNumberTest1 ".1"
'    IsNumberTest1 ".01"
'    IsNumberTest1 ".001"
'    IsNumberTest1 ".10"
'    IsNumberTest1 ".100"
'    IsNumberTest1 "..100"
'    IsNumberTest1 "100."
'    Input "PRESS ENTER TO CONTINUE TEST";in$
'    Cls
'    IsNumberTest1 "0.10"
'    IsNumberTest1 "00.100"
'    IsNumberTest1 "000.1000"
'    IsNumberTest1 "000..1000"
'    IsNumberTest1 "000.1000.00"
'    IsNumberTest1 "+1.00"
'    IsNumberTest1 "++1.00"
'    IsNumberTest1 "+-1.00"
'    IsNumberTest1 "-1.00"
'    IsNumberTest1 "-+1.00"
'    IsNumberTest1 " 1"
'    IsNumberTest1 "1 "
'    IsNumberTest1 "1. 01"
'    IsNumberTest1 "+1 "
'End Sub ' IsNumberTest
'Sub IsNumberTest1(MyString As String)
'    Const cWidth = 16
'    Dim sInput As String : sInput = left$(Chr$(34) + MyString + Chr$(34) + String$(cWidth, " "), cWidth)
'    Dim sResult As String : sResult = right$(String$(2, " ") + _Trim$(Str$(IsNumber%(MyString))), 2)
'    Print "IsNumber%(" + sInput + ") returns " + sResult
'End Sub ' IsNumberTest1

' /////////////////////////////////////////////////////////////////////////////
' Split and join strings
' https://www.qb64.org/forum/index.php?topic=1073.0

'Combine all elements of in$() into a single string with delimiter$ separating the elements.

Function join$ (in$(), delimiter$)
    Dim result$
    Dim i As Long
    result$ = in$(LBound(in$))
    For i = LBound(in$) + 1 To UBound(in$)
        result$ = result$ + delimiter$ + in$(i)
    Next i
    join$ = result$
End Function ' join$

' /////////////////////////////////////////////////////////////////////////////
' ABS was returning strange values with type LONG
' so I created this which does not.

Function LongABS& (lngValue As Long)
    If Sgn(lngValue) = -1 Then
        LongABS& = 0 - lngValue
    Else
        LongABS& = lngValue
    End If
End Function ' LongABS&

' /////////////////////////////////////////////////////////////////////////////
' remove scientific Notation to String (~40 LOC)
' SMcNeill Jan 7, 2020
' https://www.qb64.org/forum/index.php?topic=1555.msg112989#msg112989

' Last Function in code marked Best Answer (removed debug comments and
' blank lines added these 2 lines.)

Function N2S$ (EXP$)
    ReDim t$, sign$, l$, r$, r&&
    ReDim dp As Long, dm As Long, ep As Long, em As Long, check1 As Long, l As Long, i As Long
    t$ = LTrim$(RTrim$(EXP$))
    If Left$(t$, 1) = "-" Or Left$(t$, 1) = "N" Then sign$ = "-": t$ = Mid$(t$, 2)
    dp = InStr(t$, "D+"): dm = InStr(t$, "D-")
    ep = InStr(t$, "E+"): em = InStr(t$, "E-")
    check1 = Sgn(dp) + Sgn(dm) + Sgn(ep) + Sgn(em)
    If check1 < 1 Or check1 > 1 Then N2S = _Trim$(EXP$): Exit Function ' If no scientic notation is found, or if we find more than 1 type, it's not SN!
    Select Case l ' l now tells us where the SN starts at.
        Case Is < dp: l = dp
        Case Is < dm: l = dm
        Case Is < ep: l = ep
        Case Is < em: l = em
    End Select
    l$ = Left$(t$, l - 1) ' The left of the SN
    r$ = Mid$(t$, l + 1): r&& = Val(r$) ' The right of the SN, turned into a workable long
    If InStr(l$, ".") Then ' Location of the decimal, if any
        If r&& > 0 Then
            r&& = r&& - Len(l$) + 2
        Else
            r&& = r&& + 1
        End If
        l$ = Left$(l$, 1) + Mid$(l$, 3)
    End If
    Select Case r&&
        Case 0 ' what the heck? We solved it already?
            ' l$ = l$
        Case Is < 0
            For i = 1 To -r&&
                l$ = "0" + l$
            Next
            l$ = "." + l$
        Case Else
            For i = 1 To r&&
                l$ = l$ + "0"
            Next
            l$ = l$
    End Select
    N2S$ = sign$ + l$
End Function ' N2S$

' /////////////////////////////////////////////////////////////////////////////
' Pauses for iDS deciseconds (iDS * 100 ms)

Sub PauseDecisecond (iDS As Integer)
    Dim iCount As Integer
    iCount = 0
    Do
        iCount = iCount + 1
        _Limit 10 ' run 10x every second
    Loop Until iCount = iDS
End Sub ' PauseDecisecond

' /////////////////////////////////////////////////////////////////////////////
' Returns TRUE if point (x1%, y1%) is adjacent to point (x2%, y2%)

Function PointsAreAdjacent% (x1%, y1%, x2%, y2%)
    Dim bResult%: bResult% = FALSE

    ' x or y can be the same, but not both
    If (x1% <> x2%) Or (y1% <> y2%) Then
        If (x1% = x2%) Or ((x1% = (x2% + 1)) Or (x2% = (x1% + 1))) Then
            If (y1% = y2%) Or ((y1% = (y2% + 1)) Or (y2% = (y1% + 1))) Then
                bResult% = TRUE
            End If
        End If
    End If
    PointsAreAdjacent% = bResult%
End Function ' PointsAreAdjacent%

' /////////////////////////////////////////////////////////////////////////////
' Writes sText to file sFileName.
' If bAppend=TRUE appends to file, else overwrites it.

' Returns blank if successful else returns error message.

' Example:
' ProgramPath$ = Left$(Command$(0), _InStrRev(Command$(0), "\"))
' ProgramName$: m_ProgramName$ = Mid$(Command$(0), _InStrRev(Command$(0), "\") + 1)
' sFileName = ProgramPath$ + ProgramName$ + ".OUT.txt"
' sText = "This is a test." + chr$(13) + "Here is line 2." + chr$(13) + "End."
' sError = PrintFile$(sFileName, sText, FALSE)

Function PrintFile$ (sFileName As String, sText As String, bAppend As Integer)
    Dim sError As String: sError = ""

    If Len(sError) = 0 Then
        If (bAppend = TRUE) Then
            If _FileExists(sFileName) Then
                Open sFileName For Append As #1 ' opens an existing file for appending
            Else
                sError = "Error in PrintFile$ : File not found. Cannot append."
            End If
        Else
            Open sFileName For Output As #1 ' opens and clears an existing file or creates new empty file
        End If
    End If
    If Len(sError) = 0 Then
        ' NOTE: WRITE places text in quotes in the file
        'WRITE #1, x, y, z$
        'WRITE #1, sText

        ' PRINT does not put text inside quotes
        Print #1, sText

        Close #1
    End If

    PrintFile$ = sError
End Function ' PrintFile$

' /////////////////////////////////////////////////////////////////////////////
' Does a _PrintString at the specified row+column.
' iRow and iCol are 0-based.
' See also: PrintString1

Sub PrintString (iRow As Integer, iCol As Integer, MyString As String)
    Dim iX As Integer
    Dim iY As Integer
    iX = _FontWidth * iCol
    iY = _FontHeight * iRow ' (iRow + 1)
    _PrintString (iX, iY), MyString
End Sub ' PrintString

' /////////////////////////////////////////////////////////////////////////////
' Does a _PrintString at the specified row+column.
' iRow and iCol are 1-based.
' See also: PrintString

Sub PrintString1 (iRow As Integer, iCol As Integer, MyString As String)
    Dim iX As Integer
    Dim iY As Integer
    iX = _FontWidth * (iCol - 1)
    iY = _FontHeight * (iRow - 1)
    _PrintString (iX, iY), MyString
End Sub ' PrintString1

' /////////////////////////////////////////////////////////////////////////////
' Prints text character char$ at positoin x%,y% in color myColor&.

Sub PutCharXY (x%, y%, char$, myColor&)
    Color myColor&
    Locate y%, x%
    Print char$;
End Sub ' PutCharXY

' /////////////////////////////////////////////////////////////////////////////
' Generate random value between Min and Max inclusive.

Function RandomNumber% (Min%, Max%)
    Dim NumSpread%

    ' SET RANDOM SEED
    'Randomize ' Initialize random-number generator.
    Randomize Timer

    ' GET RANDOM # Min%-Max%
    'RandomNumber = Int((Max * Rnd) + Min) ' generate number

    NumSpread% = (Max% - Min%) + 1

    RandomNumber% = Int(Rnd * NumSpread%) + Min% ' GET RANDOM # BETWEEN Max% AND Min%

End Function ' RandomNumber%

'' /////////////////////////////////////////////////////////////////////////////
'
'Sub RandomNumberTest
'    Dim iCols As Integer: iCols = 10
'    Dim iRows As Integer: iRows = 20
'    Dim iLoop As Integer
'    Dim iX As Integer
'    Dim iY As Integer
'    Dim sError As String
'    Dim sFileName As String
'    Dim sText As String
'    Dim bAppend As Integer
'    Dim iMin As Integer
'    Dim iMax As Integer
'    Dim iNum As Integer
'    Dim iErrorCount As Integer
'    Dim sInput$
'
'    sFileName = "c:\temp\maze_test_1.txt"
'    sText = "Count" + Chr$(9) + "Min" + Chr$(9) + "Max" + Chr$(9) + "Random"
'    bAppend = FALSE
'    sError = PrintFile$(sFileName, sText, bAppend)
'    If Len(sError) = 0 Then
'        bAppend = TRUE
'        iErrorCount = 0
'
'        iMin = 0
'        iMax = iCols - 1
'        For iLoop = 1 To 100
'            iNum = RandomNumber%(iMin, iMax)
'            sText = Str$(iLoop) + Chr$(9) + Str$(iMin) + Chr$(9) + Str$(iMax) + Chr$(9) + Str$(iNum)
'            sError = PrintFile$(sFileName, sText, bAppend)
'            If Len(sError) > 0 Then
'                iErrorCount = iErrorCount + 1
'                Print Str$(iLoop) + ". ERROR"
'                Print "    " + "iMin=" + Str$(iMin)
'                Print "    " + "iMax=" + Str$(iMax)
'                Print "    " + "iNum=" + Str$(iNum)
'                Print "    " + "Could not write to file " + Chr$(34) + sFileName + Chr$(34) + "."
'                Print "    " + sError
'            End If
'        Next iLoop
'
'        iMin = 0
'        iMax = iRows - 1
'        For iLoop = 1 To 100
'            iNum = RandomNumber%(iMin, iMax)
'            sText = Str$(iLoop) + Chr$(9) + Str$(iMin) + Chr$(9) + Str$(iMax) + Chr$(9) + Str$(iNum)
'            sError = PrintFile$(sFileName, sText, bAppend)
'            If Len(sError) > 0 Then
'                iErrorCount = iErrorCount + 1
'                Print Str$(iLoop) + ". ERROR"
'                Print "    " + "iMin=" + Str$(iMin)
'                Print "    " + "iMax=" + Str$(iMax)
'                Print "    " + "iNum=" + Str$(iNum)
'                Print "    " + "Could not write to file " + Chr$(34) + sFileName + Chr$(34) + "."
'                Print "    " + sError
'            End If
'        Next iLoop
'
'        Print "Finished generating numbers. Errors: " + Str$(iErrorCount)
'    Else
'        Print "Error creating file " + Chr$(34) + sFileName + Chr$(34) + "."
'        Print sError
'    End If
'
'    Input "Press <ENTER> to continue", sInput$
'End Sub ' RandomNumberTest

' /////////////////////////////////////////////////////////////////////////////
' FROM: String Manipulation
' found at abandoned, outdated and now likely malicious qb64 dot net website
' http://www.qb64.[net]/forum/index_topic_5964-0/
'
'SUMMARY:
'   Purpose:  A library of custom functions that transform strings.
'   Author:   Dustinian Camburides (dustinian@gmail.com)
'   Platform: QB64 (www.qb64.org)
'   Revision: 1.6
'   Updated:  5/28/2012

'SUMMARY:
'[Replace$] replaces all instances of the [Find] sub-string with the [Add] sub-string within the [Text] string.
'INPUT:
'Text: The input string; the text that's being manipulated.
'Find: The specified sub-string; the string sought within the [Text] string.
'Add: The sub-string that's being added to the [Text] string.

Function Replace$ (Text1 As String, Find1 As String, Add1 As String)
    ' VARIABLES:
    Dim Text2 As String
    Dim Find2 As String
    Dim Add2 As String
    Dim lngLocation As Long ' The address of the [Find] substring within the [Text] string.
    Dim strBefore As String ' The characters before the string to be replaced.
    Dim strAfter As String ' The characters after the string to be replaced.

    ' INITIALIZE:
    ' MAKE COPIESSO THE ORIGINAL IS NOT MODIFIED (LIKE ByVal IN VBA)
    Text2 = Text1
    Find2 = Find1
    Add2 = Add1

    lngLocation = InStr(1, Text2, Find2)

    ' PROCESSING:
    ' While [Find2] appears in [Text2]...
    While lngLocation
        ' Extract all Text2 before the [Find2] substring:
        strBefore = Left$(Text2, lngLocation - 1)

        ' Extract all text after the [Find2] substring:
        strAfter = Right$(Text2, ((Len(Text2) - (lngLocation + Len(Find2) - 1))))

        ' Return the substring:
        Text2 = strBefore + Add2 + strAfter

        ' Locate the next instance of [Find2]:
        lngLocation = InStr(1, Text2, Find2)

        ' Next instance of [Find2]...
    Wend

    ' OUTPUT:
    Replace$ = Text2
End Function ' Replace$

'' /////////////////////////////////////////////////////////////////////////////
'
'Sub ReplaceTest
'    Dim in$
'
'    Print "-------------------------------------------------------------------------------"
'    Print "ReplaceTest"
'    Print
'
'    Print "Original value"
'    in$ = "Thiz iz a teZt."
'    Print "in$ = " + Chr$(34) + in$ + Chr$(34)
'    Print
'
'    Print "Replacing lowercase " + Chr$(34) + "z" + Chr$(34) + " with " + Chr$(34) + "s" + Chr$(34) + "..."
'    in$ = Replace$(in$, "z", "s")
'    Print "in$ = " + Chr$(34) + in$ + Chr$(34)
'    Print
'
'    Print "Replacing uppercase " + Chr$(34) + "Z" + Chr$(34) + " with " + Chr$(34) + "s" + Chr$(34) + "..."
'    in$ = Replace$(in$, "Z", "s")
'    Print "in$ = " + Chr$(34) + in$ + Chr$(34)
'    Print
'
'    Print "ReplaceTest finished."
'End Sub ' ReplaceTest

' /////////////////////////////////////////////////////////////////////////////
' https://staging.qb64phoenix.com/showthread.php?tid=644
' From: bplus
' Date: 07-18-2022, 03:16 PM
' Here is a Round$ that acts the way you'd expect in under 100 LOC
' b = b + ...

Function Round$ (anyNumber, dp As Long)
    ' 5 and up at decimal place dp+1 > +1 at decimal place   4 and down  > +0 at dp
    ' 2 1 0.-1 -2 -3 -4 ...  pick dp like this for this Round$ Function
    sn$ = N2S$(Str$(anyNumber + .5 * 10 ^ dp)) ' get rid of sci notation, steve trims it so next find dot
    dot = InStr(sn$, ".")
    If dot Then
        predot = dot - 1
        postdot = Len(sn$) - (dot + 1)
    Else
        predot = Len(sn$)
        postdot = 0
    End If
    ' xxx.yyyyyy  dp = -2
    '      ^ dp
    If dp >= 0 Then
        Rtn$ = Mid$(sn$, 1, predot - dp) + String$(dp, "0")
    Else
        Rtn$ = Mid$(sn$, 1, predot) + "." + Mid$(sn$, dot + 1, -dp)
    End If
    If Rtn$ = "" Then
        Round$ = "0"
    Else
        Round$ = Rtn$
    End If
End Function ' Round$

'' /////////////////////////////////////////////////////////////////////////////
'
'Sub RoundTest
'   Print Round$(.15, 0) '  0
'   Print Round$(.15, -1) ' .2
'   Print Round$(.15, -2) ' .15
'   Print Round$(.15, -3) ' .150
'   Print
'   Print Round$(3555, 0) ' 3555
'   Print Round$(3555, 1) ' 3560
'   Print Round$(3555, 2) ' 3600 'good
'   Print Round$(3555, 3) ' 4000
'   Print
'   Print Round$(23.149999, -1) ' 23.1
'   Print Round$(23.149999, -2) ' 23.15
'   Print Round$(23.149999, -3) ' 23.150
'   Print Round$(23.149999, -4) ' 23.1500
'   Print
'   Print Round$(23.143335, -1) ' 23.1 OK?
'   Print Round$(23.143335, -2) ' 23.14
'   Print Round$(23.143335, -3) ' 23.143
'   Print Round$(23.143335, -4) ' 23.1433
'   Print Round$(23.143335, -5) ' 23.14334
'   Print
'   Dim float31 As _Float
'   float31 = .310000000000009
'   Print Round$(.31, -2) ' .31
'   Print Round$(.31##, -2)
'   Print Round$(float31, -2)
'End Sub ' RoundTest

' /////////////////////////////////////////////////////////////////////////////
' TODO: verify these work (function Round$ works)

' https://www.qb64.org/forum/index.php?topic=3605.0
' Quote from: SMcNeill on Today at 03:53:48 PM
'
' Sometimes, you guys make things entirely too complicated.
' There ya go!  Three functions to either round naturally,
' always round down, or always round up, to whatever number of digits you desire.
' EDIT: Modified to add another option to round scientific,
' since you had it's description included in your example.

Function RoundNatural## (num##, digits%)
    RoundNatural## = Int(num## * 10 ^ digits% + .5) / 10 ^ digits%
End Function

Function RoundUp## (num##, digits%)
    RoundUp## = _Ceil(num## * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundDown## (num##, digits%)
    RoundDown## = Int(num## * 10 ^ digits%) / 10 ^ digits%
End Function

Function Round_Scientific## (num##, digits%)
    Round_Scientific## = _Round(num## * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundUpDouble# (num#, digits%)
    RoundUpDouble# = _Ceil(num# * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundUpSingle! (num!, digits%)
    RoundUpSingle! = _Ceil(num! * 10 ^ digits%) / 10 ^ digits%
End Function

' /////////////////////////////////////////////////////////////////////////////
' fantastically inefficient way to set a bit

' example use: arrMaze(iX, iY) = SetBit256%(arrMaze(iX, iY), cS, FALSE)

' See also: GetBit256%, SetBit256%

' newint=SetBit256%(oldint, int containing the bits we want to set, value to set them to)
Function SetBit256% (iNum1 As Integer, iBit1 As Integer, bVal1 As Integer)
    Dim sNum As String
    Dim sBit As String
    Dim sVal As String
    Dim iLoop As Integer
    Dim strResult As String
    Dim iResult As Integer
    Dim iNum As Integer: iNum = iNum1
    Dim iBit As Integer: iBit = iBit1
    Dim bVal As Integer: bVal = bVal1

    If iNum < 256 And iBit <= 128 Then
        sNum = GetBinary$(iNum)
        sBit = GetBinary$(iBit)
        If bVal = TRUE Then
            sVal = "1"
        Else
            sVal = "0"
        End If
        strResult = ""
        For iLoop = 1 To 8
            If Mid$(sBit, iLoop, 1) = "1" Then
                strResult = strResult + sVal
            Else
                strResult = strResult + Mid$(sNum, iLoop, 1)
            End If
        Next iLoop
        iResult = GetIntegerFromBinary%(strResult)
    Else
        iResult = iNum
    End If

    SetBit256% = iResult
End Function ' SetBit256%

' /////////////////////////////////////////////////////////////////////////////
' TODO: verify this works

' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

Function SngToStr$ (n!)
    value$ = UCase$(LTrim$(Str$(n!)))
    Xpos% = InStr(value$, "D") + InStr(value$, "E") 'only D or E can be present
    If Xpos% Then
        expo% = Val(Mid$(value$, Xpos% + 1))
        If Val(value$) < 0 Then
            sign$ = "-": valu$ = Mid$(value$, 2, Xpos% - 2)
        Else valu$ = Mid$(value$, 1, Xpos% - 1)
        End If
        dot% = InStr(valu$, "."): L% = Len(valu$)
        If expo% > 0 Then add$ = String$(expo% - (L% - dot%), "0")
        If expo% < 0 Then min$ = String$(Abs(expo%) - (dot% - 1), "0"): DP$ = "."
        For n = 1 To L%
            If Mid$(valu$, n, 1) <> "." Then num$ = num$ + Mid$(valu$, n, 1)
        Next
    Else SngToStr$ = value$: Exit Function
    End If
    SngToStr$ = _Trim$(sign$ + DP$ + min$ + num$ + add$)
End Function ' SngToStr$

' /////////////////////////////////////////////////////////////////////////////
' Split and join strings
' https://www.qb64.org/forum/index.php?topic=1073.0
'
' FROM luke, QB64 Developer
' Date: February 15, 2019, 04:11:07 AM
'
' Given a string of words separated by spaces (or any other character),
' splits it into an array of the words. I've no doubt many people have
' written a version of this over the years and no doubt there's a million
' ways to do it, but I thought I'd put mine here so we have at least one
' version. There's also a join function that does the opposite
' array -> single string.
'
' Code is hopefully reasonably self explanatory with comments and a little demo.
' Note, this is akin to Python/JavaScript split/join, PHP explode/implode.

'Split in$ into pieces, chopping at every occurrence of delimiter$. Multiple consecutive occurrences
'of delimiter$ are treated as a single instance. The chopped pieces are stored in result$().
'
'delimiter$ must be one character long.
'result$() must have been REDIMmed previously.

' Modified to handle multi-character delimiters

Sub split (in$, delimiter$, result$())
    Dim start As Integer
    Dim finish As Integer
    Dim iDelimLen As Integer
    ReDim result$(-1)

    iDelimLen = Len(delimiter$)

    start = 1
    Do
        'While Mid$(in$, start, 1) = delimiter$
        While Mid$(in$, start, iDelimLen) = delimiter$
            'start = start + 1
            start = start + iDelimLen
            If start > Len(in$) Then
                Exit Sub
            End If
        Wend
        finish = InStr(start, in$, delimiter$)
        If finish = 0 Then
            finish = Len(in$) + 1
        End If

        ReDim _Preserve result$(0 To UBound(result$) + 1)

        result$(UBound(result$)) = Mid$(in$, start, finish - start)
        start = finish + 1
    Loop While start <= Len(in$)
End Sub ' split

'' /////////////////////////////////////////////////////////////////////////////
'
'Sub SplitTest
'    Dim in$
'    Dim delim$
'    ReDim arrTest$(0)
'    Dim iLoop%
'
'    delim$ = Chr$(10)
'    in$ = "this" + delim$ + "is" + delim$ + "a" + delim$ + "test"
'    Print "in$ = " + Chr$(34) + in$ + Chr$(34)
'    Print "delim$ = " + Chr$(34) + delim$ + Chr$(34)
'    split in$, delim$, arrTest$()
'
'    For iLoop% = LBound(arrTest$) To UBound(arrTest$)
'        Print "arrTest$(" + LTrim$(RTrim$(Str$(iLoop%))) + ") = " + Chr$(34) + arrTest$(iLoop%) + Chr$(34)
'    Next iLoop%
'    Print
'    Print "Split test finished."
'End Sub ' SplitTest

'' /////////////////////////////////////////////////////////////////////////////
'
'Sub SplitAndReplaceTest
'    Dim in$
'    Dim out$
'    Dim iLoop%
'    ReDim arrTest$(0)
'
'    Print "-------------------------------------------------------------------------------"
'    Print "SplitAndReplaceTest"
'    Print
'
'    Print "Original value"
'    in$ = "This line 1 " + Chr$(13) + Chr$(10) + "and line 2" + Chr$(10) + "and line 3 " + Chr$(13) + "finally THE END."
'    out$ = in$
'    out$ = Replace$(out$, Chr$(13), "\r")
'    out$ = Replace$(out$, Chr$(10), "\n")
'    out$ = Replace$(out$, Chr$(9), "\t")
'    Print "in$ = " + Chr$(34) + out$ + Chr$(34)
'    Print
'
'    Print "Fixing linebreaks..."
'    in$ = Replace$(in$, Chr$(13) + Chr$(10), Chr$(13))
'    in$ = Replace$(in$, Chr$(10), Chr$(13))
'    out$ = in$
'    out$ = Replace$(out$, Chr$(13), "\r")
'    out$ = Replace$(out$, Chr$(10), "\n")
'    out$ = Replace$(out$, Chr$(9), "\t")
'    Print "in$ = " + Chr$(34) + out$ + Chr$(34)
'    Print
'
'    Print "Splitting up..."
'    split in$, Chr$(13), arrTest$()
'
'    For iLoop% = LBound(arrTest$) To UBound(arrTest$)
'        out$ = arrTest$(iLoop%)
'        out$ = Replace$(out$, Chr$(13), "\r")
'        out$ = Replace$(out$, Chr$(10), "\n")
'        out$ = Replace$(out$, Chr$(9), "\t")
'        Print "arrTest$(" + cstr$(iLoop%) + ") = " + Chr$(34) + out$ + Chr$(34)
'    Next iLoop%
'    Print
'
'    Print "SplitAndReplaceTest finished."
'End Sub ' SplitAndReplaceTest

' /////////////////////////////////////////////////////////////////////////////
' Converts a chr$(13) delimited string
' into a 2-dimensional array.

' Usage:
' Dim StringArray(1 To 48, 1 To 128) As String
' StringTo2dArray StringArray(), GetMap$

' Version 2 with indexed array(row, columm)
' Renamed StringToArray to StringTo2dArray.

' See also: Array2dToString$

Sub StringTo2dArray (MyArray() As String, MyString As String)
    Dim sDelim As String
    ReDim arrLines(0) As String
    Dim iRow As Integer
    Dim iCol As Integer
    Dim sChar As String
    Dim iDim1 As Integer
    Dim iDim2 As Integer
    Dim iIndex1 As Integer
    Dim iIndex2 As Integer

    iDim1 = LBound(MyArray, 1)
    iDim2 = LBound(MyArray, 2)
    sDelim = Chr$(13)
    split MyString, sDelim, arrLines()
    For iRow = LBound(arrLines) To UBound(arrLines)
        If iRow <= UBound(MyArray, 1) Then
            For iCol = 1 To Len(arrLines(iRow))
                If iCol <= UBound(MyArray, 2) Then
                    sChar = Mid$(arrLines(iRow), iCol, 1)

                    If Len(sChar) > 1 Then
                        sChar = Left$(sChar, 1)
                    Else
                        If Len(sChar) = 0 Then
                            sChar = "."
                        End If
                    End If

                    iIndex1 = iRow + iDim1
                    iIndex2 = (iCol - 1) + iDim2
                    MyArray(iIndex1, iIndex2) = sChar
                    'DebugPrint "MyArray(" + cstr$(iIndex1) + ", " + cstr$(iIndex2) + " = " + chr$(34) + sChar + chr$(34)
                Else
                    ' Exit if out of bounds
                    Exit For
                End If
            Next iCol
        Else
            ' Exit if out of bounds
            Exit For
        End If
    Next iRow
End Sub ' StringTo2dArray

' /////////////////////////////////////////////////////////////////////////////

Function StrPadLeft$ (sValue As String, iWidth As Integer)
    StrPadLeft$ = Right$(String$(iWidth, " ") + sValue, iWidth)
End Function ' StrPadLeft$

' /////////////////////////////////////////////////////////////////////////////

Function StrJustifyRight$ (sValue As String, iWidth As Integer)
    StrJustifyRight$ = Right$(String$(iWidth, " ") + sValue, iWidth)
End Function ' StrJustifyRight$

' /////////////////////////////////////////////////////////////////////////////

Function StrPadRight$ (sValue As String, iWidth As Integer)
    StrPadRight$ = Left$(sValue + String$(iWidth, " "), iWidth)
End Function ' StrPadRight$

' /////////////////////////////////////////////////////////////////////////////

Function StrJustifyLeft$ (sValue As String, iWidth As Integer)
    StrJustifyLeft$ = Left$(sValue + String$(iWidth, " "), iWidth)
End Function ' StrJustifyLeft$

' /////////////////////////////////////////////////////////////////////////////
' div: int1% = num1% \ den1%
' mod: rem1% = num1% MOD den1%

Function StrJustifyCenter$ (sValue As String, iWidth As Integer)
    Dim iLen0 As Integer
    Dim iLen1 As Integer
    Dim iLen2 As Integer
    Dim iExtra As Integer

    iLen0 = Len(sValue)
    If iWidth = iLen0 Then
        ' no extra space: return unchanged
        StrJustifyCenter$ = sValue
    ElseIf iWidth > iLen0 Then
        If IsOdd%(iWidth) Then
            iWidth = iWidth - 1
        End If

        ' center
        iExtra = iWidth - iLen0
        iLen1 = iExtra \ 2
        iLen2 = iLen1 + (iExtra Mod 2)
        StrJustifyCenter$ = String$(iLen1, " ") + sValue + String$(iLen2, " ")
    Else
        ' string is too long: truncate
        StrJustifyCenter$ = Left$(sValue, iWidth)
    End If
End Function ' StrJustifyCenter$

' /////////////////////////////////////////////////////////////////////////////
' Use to pretty print TRUE and FALSE values.

Function TrueFalse$ (myValue)
    If myValue = TRUE Then
        TrueFalse$ = "TRUE"
    Else
        TrueFalse$ = "FALSE"
    End If
End Function ' TrueFalse$

' /////////////////////////////////////////////////////////////////////////////

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END GENERAL PURPOSE ROUTINES
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' #REFERENCE
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' SOME USEFUL STUFF FOR REFERENCE:

' Type Name               Type suffix symbol   Minimum value                  Maximum value                Size in Bytes
' ---------------------   ------------------   ----------------------------   --------------------------   -------------
' _BIT                    `                    -1                             0                            1/8
' _BIT * n                `n                   -128                           127                          n/8
' _UNSIGNED _BIT          ~`                   0                              1                            1/8
' _BYTE                   %%                   -128                           127                          1
' _UNSIGNED _BYTE         ~%%                  0                              255                          1
' INTEGER                 %                    -32,768                        32,767                       2
' _UNSIGNED INTEGER       ~%                   0                              65,535                       2
' LONG                    &                    -2,147,483,648                 2,147,483,647                4
' _UNSIGNED LONG          ~&                   0                              4,294,967,295                4
' _INTEGER64              &&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    8
' _UNSIGNED _INTEGER64    ~&&                  0                              18,446,744,073,709,551,615   8
' SINGLE                  ! or none            -2.802597E-45                  +3.402823E+38                4
' DOUBLE                  #                    -4.490656458412465E-324        +1.797693134862310E+308      8
' _FLOAT                  ##                   -1.18E-4932                    +1.18E+4932                  32(10 used)
' _OFFSET                 %&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    Use LEN
' _UNSIGNED _OFFSET       ~%&                  0                              18,446,744,073,709,551,615   Use LEN
' _MEM                    none                 combined memory variable type  N/A                          Use LEN

' div: int1% = num1% \ den1%
' mod: rem1% = num1% MOD den1%

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' @REFERENCE
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Reply
#2
Nice work. One thing that I advise, though, is that instead of this line:

Code: (Select All)
Screen _NewImage(1280, 1024, 32): _ScreenMove 0, 0

could put this at the top:

Code: (Select All)
$CONSOLE:ONLY

Some of us are on "tiny" laptops with only 768 pixel rows, and 8x8 characters become unreadable.

However I noticed a function GetColorXY(). Does this program do any text highlighting?
Reply
#3
I've written this a long time ago and still using it everywhere to handle/calculate with dates/times:
Code: (Select All)
Function timeStamp~&& (dt$)
  year% = Val(Left$(dt$, 4)): month% = Val(Mid$(dt$, 6, 2)): day% = Val(Mid$(dt$, 9, 2))
  hour% = Val(Mid$(dt$, 13, 2)): minute% = Val(Mid$(dt$, 16, 2)): second% = Val(Mid$(dt$, 19, 2))
  timeStamp~&& = TIM.stamp(year%, month%, day%, hour%, minute%, second%)
End Function

Function timeString$ (dt~&&)
  dt$ = TIM.dateTime$(dt~&&, year%, month%, day%, hour%, minute%, second%)
  timeString$ = Left$(dt$, 4) + "-" + Mid$(dt$, 5, 2) + "-" + Mid$(dt$, 7, 2) + "  " + Mid$(dt$, 9, 2) + ":" + Mid$(dt$, 11, 2) + ":" + Mid$(dt$, 13, 2)
End Function

Function TIM.now~&& ()
  dat$ = Date$: tim~& = Timer
  month% = Val(Left$(dat$, 2))
  day% = Val(Mid$(dat$, 4, 2))
  year% = Val(Mid$(dat$, 7, 4))
  TIM.now~&& = TIM.days~&(year%, month%, day%) * 86400~&& + tim~&
End Function

Function TIM.utc~&& ()
  Type UTCtype
    year As Integer
    month As Integer
    weekday As Integer
    day As Integer
    hour As Integer
    minute As Integer
    second As Integer
    millis As Integer
  End Type
  Declare Dynamic Library "Kernel32"
    Sub GetUTC Alias GetSystemTime (lpSystemTime As UTCtype)
  End Declare
  Dim utc As UTCtype: GetUTC utc
  TIM.utc~&& = TIM.stamp~&&(utc.year, utc.month, utc.day, utc.hour, utc.minute, utc.second)
End Function

Function TIM.stamp~&& (year%, month%, day%, hour%, minute%, second%)
  TIM.stamp~&& = TIM.days~&(year%, month%, day%) * 86400~&& + TIM.seconds~&(hour%, minute%, second%)
End Function

Function TIM.days~& (year%, month%, day%)
  leap% = TIM.leapYear(year%): prevYear% = year% - 1
  dPrevYears& = ((((prevYear% * 365) + (prevYear% \ 4)) - (prevYear% \ 100)) + (prevYear% \ 400))
  Select Case month%
    Case 1: TIM.days~& = ((dPrevYears&) + day%) - 1
    Case 2: TIM.days~& = ((dPrevYears& + 31) + day%) - 1
    Case 3: TIM.days~& = ((dPrevYears& + 59 - leap%) + day%) - 1
    Case 4: TIM.days~& = ((dPrevYears& + 90 - leap%) + day%) - 1
    Case 5: TIM.days~& = ((dPrevYears& + 120 - leap%) + day%) - 1
    Case 6: TIM.days~& = ((dPrevYears& + 151 - leap%) + day%) - 1
    Case 7: TIM.days~& = ((dPrevYears& + 181 - leap%) + day%) - 1
    Case 8: TIM.days~& = ((dPrevYears& + 212 - leap%) + day%) - 1
    Case 9: TIM.days~& = ((dPrevYears& + 243 - leap%) + day%) - 1
    Case 10: TIM.days~& = ((dPrevYears& + 273 - leap%) + day%) - 1
    Case 11: TIM.days~& = ((dPrevYears& + 304 - leap%) + day%) - 1
    Case 12: TIM.days~& = ((dPrevYears& + 334 - leap%) + day%) - 1
    Case Else: TIM.days~& = 0
  End Select
End Function

Function TIM.seconds~& (hour%, minute%, second%)
  TIM.seconds~& = hour% * 3600 + minute% * 60 + second%
End Function

Function TIM.dateTime$ (timestmp~&&, year%, month%, day%, hour%, minute%, second%)
  tdays~& = timestmp~&& \ 86400 + 306
  secs~& = timestmp~&& Mod 86400
  era% = tdays~& \ 146097
  doe~& = tdays~& Mod 146097 ' [0, 146096]
  yoe% = (doe~& - doe~& \ 1460 + doe~& \ 36524 - doe~& \ 146096) \ 365 ' [0, 399]
  year% = yoe% + era% * 400
  doy% = doe~& - (365 * yoe% + yoe% \ 4 - yoe% \ 100) ' [0, 365]
  mp% = (5 * doy% + 2) \ 153 ' [0, 11]
  day% = doy% - (153 * mp% + 2) \ 5 + 1 ' [1, 31]
  If mp% < 10 Then month% = mp% + 3 Else month% = mp% - 9 ' [1, 12]
  year% = year% - (month% <= 2)
  dat$ = Right$("000" + LTrim$(Str$(year%)), 4) + _
    Right$("0" + LTrim$(Str$(month%)), 2) + _
    Right$("0" + LTrim$(Str$(day%)), 2)
  hour% = secs~& \ 3600
  minsec% = secs~& - (hour% * 3600)
  minute% = minsec% \ 60
  second% = minsec% - (minute% * 60)
  TIM.dateTime$ = dat$ + _
  Right$("0" + LTrim$(Str$(hour%)), 2) + _
    Right$("0" + LTrim$(Str$(minute%)), 2) + _
    Right$("0" + LTrim$(Str$(second%)), 2)
End Function

Function TIM.format$ (ts~&&)
  dt$ = TIM.dateTime$(ts~&&, year, month, day, hour, minute, second)
  dt2$ = Mid$("SuMoTuWeThFrSa", TIM.weekDay(ts~&&) * 2 + 1, 2)+" " + _
    Mid$(dt$, 7, 2) + "-" + Mid$(dt$, 5, 2) + "-" + Mid$(dt$, 1, 4) + " " + _
    Mid$(dt$, 9, 2) + ":" + Mid$(dt$, 11, 2) + ":" + Mid$(dt$, 13, 2)
  TIM.format$ = dt2$
End Function

Function TIM.leapYear% (year%)
  If (year% Mod 4) <> 0 Then
    TIM.leapYear% = FALSE
  ElseIf (year% Mod 100) = 0 Then
    TIM.leapYear% = (year% Mod 400) = 0
  Else
    TIM.leapYear% = TRUE
  End If
End Function

Function TIM.weekDay% (ts~&&)
  tdays~& = ts~&& \ 86400
  TIM.weekDay% = (tdays~& + 1) Mod 7
End Function
45y and 2M lines of MBASIC>BASICA>QBASIC>QBX>QB64 experience
Reply
#4
Well done but for Windows only. I made an attempt to fix the "TIM.UTC~&&()" function so it worked for Linux but was unsuccessful. Must instead use "gmtime()" or "mktime()" from C library and "struct tm" which is ordered a bit differently and doesn't offer milliseconds. The "mktime()" takes only one parameter of "struct tm" but goes on local time not UTC. The "gmtime()" however is more complicated to use, the first parameter is a structure with "calendar" time and the second parameter is the return value of type "struct tm". Is the "TIM.UTC~&&()" used to get today's date and current time? That's how I attempted to fix it.

This is the one function in mdijkens' code that I tried to fix:

Code: (Select All)
Function TIM.utc~&& ()
$IF WIN THEN
  Type UTCtype
    year As Integer
    month As Integer
    weekday As Integer
    day As Integer
    hour As Integer
    minute As Integer
    second As Integer
    millis As Integer
  End Type
  Declare Dynamic Library "Kernel32"
    Sub GetUTC Alias GetSystemTime (lpSystemTime As UTCtype)
  End Declare
  Dim utc As UTCtype: GetUTC utc
  TIM.utc~&& = TIM.stamp~&&(utc.year, utc.month, utc.day, utc.hour, utc.minute, utc.second)
$ELSE
  Type UTCtype
    second as Integer
    minute as Integer
    hour as Integer
    day as Integer
    month as Integer
    year as Integer
    weekday as Integer
    yearday as Integer
    isdst as Integer
    tmgmtoff as Long
    tmzone as _Offset
  End Type
  Declare CustomType Library
    Sub GetUTC Alias mktime (lpSystemTime As UTCtype)
  End Declare
  Dim utc As UTCtype: GetUTC utc
  TIM.utc~&& = TIM.stamp~&&(utc.year, utc.month, utc.day, utc.hour, utc.minute, utc.second)
$END IF
End Function

and this is the "struct tm" definition and the two C functions:

Code: (Select All)
/* from "(include_path)/bits/types/struct_tm.h" */
struct tm
{
  int tm_sec;            /* Seconds.    [0-60] (1 leap second) */
  int tm_min;            /* Minutes.    [0-59] */
  int tm_hour;            /* Hours.    [0-23] */
  int tm_mday;            /* Day.        [1-31] */
  int tm_mon;            /* Month.    [0-11] */
  int tm_year;            /* Year    - 1900.  */
  int tm_wday;            /* Day of week.    [0-6] */
  int tm_yday;            /* Days in year.[0-365]    */
  int tm_isdst;            /* DST.        [-1/0/1]*/

# ifdef    __USE_MISC
  long int tm_gmtoff;        /* Seconds east of UTC.  */
  const char *tm_zone;        /* Timezone abbreviation.  */
# else
  long int __tm_gmtoff;        /* Seconds east of UTC.  */
  const char *__tm_zone;    /* Timezone abbreviation.  */
# endif
};

/* from "(include_path)/time.h" */
extern struct tm *gmtime (const time_t *__timer) __THROW;
# ifdef __REDIRECT_NTH
extern struct tm*__REDIRECT_NTH (gmtime, (const time_t *__timer), __gmtime64);
# endif
extern time_t mktime (struct tm *__tp) __THROW;
Reply
#5
Quote:@mnrvovrfc - could put this at the top: $CONSOLE:ONLY

When using "$Console:only" an error occurs: The output remains empty!

[Image: Timestamp-Console-Only.jpg]
Reply
#6
@Kernelpanic
Comment out the SCREEN NEWIMAGE line when using $CONSOLE:ONLY
Ask me about Windows API and maybe some Linux stuff
Reply
#7
(03-03-2023, 03:02 PM)Balderdash Wrote: @Kernelpanic
Comment out the SCREEN NEWIMAGE line when using $CONSOLE:ONLY

Yes, that's how it works. Thanks!
Reply
#8
LOL at "SHE-IT BACKWARDS" and needing to look up a function that determines if an integer is odd or even...

There is a whole toolbox in this source code. But what are the chances that there could be at least one thing that isn't around in the code, such as "epoch to string"?

For many jobs to get a formatted date, the "strftime()" function from C library could be used. But there should be an intelligent format to cover the cryptic codes required by the C function because some people don't like typing in "%a" and "%M" and having to remember something alien to BASIC.

I don't know, something like:

Code: (Select All)
dow, mon day, yea at h24:min zon

which returns:

Code: (Select All)
Monday, March 13, 2023 at 14:05 ESTDST

Search for three-letter codes to convert into internal percent-codes for "strftime()". Any text not recognized is left alone. Or maybe preface the search tag with "squiggle" or some other character unlikely to be used in a normal communication.

These are just ideas. I'm proposing stuff without coding anything, see if somebody else does it.
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