dbatools

1.1.23

internal/functions/Convert-DbaLSN.ps1

                                function Convert-DbaLSN {

    <#

    .SYNOPSIS

        Converts Lsns betweent Hex and/or numeric formats

    .DESCRIPTION

        Function takes an LSN in either split Hexadecimal format () or numberic

        It then returns both formats in an object

    .PARAMETER LSN

        The LSN value to be converted

    .EXAMPLE

        PS C:\ $output = Convert-DbaLSN -LSN 0000002f:000044aa:002b

        Will return object $Output with the following value

        $Output.HexLSN = 0000002f:000044aa:002b

        $Output.NumbericLSN =

    #>

    [CmdletBinding()]

    param(

        [string]$LSN,

        [switch]$EnableException

    )

    if ($LSN -match '^[a-fA-F0-9]{8}:[a-fA-F0-9]{8}:[a-fA-F0-9]{4}$') {

        Write-Message -Message 'Hexadecimal LSN passed in, converting to numeric' -Level Verbose

        $sections = $LSN.Split(':')

        $sect1 = [System.Convert]::ToInt64($sections[0], 16).ToString()

        $sect2 = [System.Convert]::ToInt64($sections[1], 16).ToString().PadLeft(10, '0')

        $sect3 = [System.Convert]::ToInt64($sections[2], 16).ToString().PadLeft(5, '0')

        $Hexadecimal = $LSN

        $Numeric = $sect1 + $sect2 + $sect3

    } elseif ($LSN -match '^[0-9]{15}[0-9]+$') {

        Write-Message -Message 'Numeric LSN passed in, converting to Hexadecimal' -Level Verbose

        $sect1 = '{0:x}' -f [System.Convert]::ToString($LSN.Substring(0, $LSN.length - 15), 16).PadLeft(8, '0')

        $sect2 = '{0:x}' -f [System.Convert]::ToString($LSN.Substring($lsn.length - 14, 9), 16).PadLeft(8, '0')

        $sect3 = '{0:x}' -f [System.Convert]::ToString($LSN.Substring($lsn.length - 5, 5), 16).PadLeft(4, '0')

        $Numeric = $LSN

        $Hexadecimal = $sect1 + ':' + $sect2 + ':' + $sect3

    } else {

        Stop-Function -Message 'LSN passed in is neither Numeric nor in the correct hexadecimal format'

        return

    }

    [PSCustomObject]@{

        Hexadecimal = $Hexadecimal

        Numeric     = $Numeric

    }

}

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