PowerShell Script to Split Large Files

join.ps1

function join($path)
{
    $files = Get-ChildItem -Path "$path.*.part" | Sort-Object -Property @{Expression={
        $shortName = [System.IO.Path]::GetFileNameWithoutExtension($_.Name)
        $extension = [System.IO.Path]::GetExtension($shortName)
        if ($extension -ne $null -and $extension -ne '')
        {
            $extension = $extension.Substring(1)
        }
        [System.Convert]::ToInt32($extension)
    }}
    $writer = [System.IO.File]::OpenWrite($path)
    foreach ($file in $files)
    {
        $bytes = [System.IO.File]::ReadAllBytes($file)
        $writer.Write($bytes, 0, $bytes.Length)
    }
    $writer.Close()
}

#join "C:\path\to\file"

split.ps1

function split($path, $chunkSize=107374182)
{
    $fileName = [System.IO.Path]::GetFileNameWithoutExtension($path)
    $directory = [System.IO.Path]::GetDirectoryName($path)
    $extension = [System.IO.Path]::GetExtension($path)

    $file = New-Object System.IO.FileInfo($path)
    $totalChunks = [int]($file.Length / $chunkSize) + 1
    $digitCount = [int][System.Math]::Log10($totalChunks) + 1

    $reader = [System.IO.File]::OpenRead($path)
    $count = 0
    $buffer = New-Object Byte[] $chunkSize
    $hasMore = $true
    while($hasMore)
    {
        $bytesRead = $reader.Read($buffer, 0, $buffer.Length)
        $chunkFileName = "$directory\$fileName$extension.{0:D$digitCount}.part"
        $chunkFileName = $chunkFileName -f $count
        $output = $buffer
        if ($bytesRead -ne $buffer.Length)
        {
            $hasMore = $false
            $output = New-Object Byte[] $bytesRead
            [System.Array]::Copy($buffer, $output, $bytesRead)
        }
        [System.IO.File]::WriteAllBytes($chunkFileName, $output)
        ++$count
    }

    $reader.Close()
}

#split "C:\path\to\file"

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