functions/Split-File.ps1
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<#
.Synopsis Splits a file to smaller files with choosable size. .Description Splits a file to smaller files with choosable size. The source file remains unchanged. The resulting files have the name of the source file with an appended forthcounting number. .Parameter Path Path of the source file .Parameter NewSize Size of the splitted parts (default is 100MB) .Inputs None .Outputs None .Example Split-File "BigFile.dat" 10000000 Divides the file BigFile.dat into parts of 10000000 byte size .Notes Author: Markus Scholtes Version: 1.01 Date: 2020-05-03 #> function Split-File([STRING] $Path, [INT64] $Newsize = 100MB) { if ($Newsize -le 0) { Write-Error "Only positive sizes allowed" return } "Splitting file $Path to parts of $Newsize byte size" $FILEPATH = [IO.Path]::GetDirectoryName($Path) if ($FILEPATH -ne "") { $FILEPATH = $FILEPATH + "\" } $FILENAME = [IO.Path]::GetFileNameWithoutExtension($Path) $EXTENSION = [IO.Path]::GetExtension($Path) $MAXVALUE = 1GB # Hard maximum limit for Byte array for 64-Bit .Net 4 = [INT32]::MaxValue - 56, see here https://stackoverflow.com/questions/3944320/maximum-length-of-byte # but only around 1.5 GB in 32-Bit environment! So I chose 1 GB just to be safe $PASSES = [MATH]::Floor($Newsize / $MAXVALUE) $REMAINDER = $Newsize % $MAXVALUE if ($PASSES -gt 0) { $BUFSIZE = $MAXVALUE } else { $BUFSIZE = $REMAINDER } $OBJREADER = New-Object System.IO.BinaryReader([System.IO.File]::Open($Path, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read)) [Byte[]]$BUFFER = New-Object Byte[] $BUFSIZE $NUMFILE = 1 do { $NEWNAME = "{0}{1}{2,2:00}{3}" -f ($FILEPATH, $FILENAME, $NUMFILE, $EXTENSION) $COUNT = 0 $OBJWRITER = $NULL [INT32]$BYTESREAD = 0 while (($COUNT -lt $PASSES) -and (($BYTESREAD = $OBJREADER.Read($BUFFER, 0, $BUFFER.Length)) -gt 0)) { if (!$OBJWRITER) { $OBJWRITER = New-Object System.IO.BinaryWriter([System.IO.File]::Create($NEWNAME)) "Writing to file $NEWNAME" } "Reading $BYTESREAD bytes of $Path" $OBJWRITER.Write($BUFFER, 0, $BYTESREAD) $COUNT++ } if (($REMAINDER -gt 0) -and (($BYTESREAD = $OBJREADER.Read($BUFFER, 0, $REMAINDER)) -gt 0)) { if (!$OBJWRITER) { $OBJWRITER = New-Object System.IO.BinaryWriter([System.IO.File]::Create($NEWNAME)) "Writing to file $NEWNAME" } "Reading $BYTESREAD bytes of $Path" $OBJWRITER.Write($BUFFER, 0, $BYTESREAD) } if ($OBJWRITER) { $OBJWRITER.Close() } ++$NUMFILE } while ($BYTESREAD -gt 0) $OBJREADER.Close() } <# .Synopsis Joins files whose names or filesystem objects are handed in the pipeline to one target file .Description Joins files whose names or filesystem objects are handed in the pipeline to one target file. If the target file exists it will be overwritten. The source files remain unchanged. .Parameter Path Path to the source file .Inputs Array of strings or filesystem objects .Outputs None .Example dir *.pdf | Join-File All.pdf Joins all PDF files to target file All.pdf .Example "E.pdf", "C.pdf", "G.pdf", "V.pdf", "P.pdf"| Join-File .\Result.dat Joins the listed PDF files to target file Result.dat .Notes Author: Markus Scholtes Version: 1.0 Date: 2017-09-04 #> function Join-File([STRING] $Path) { if ((!$Path) -or ($Path -eq "")) { Write-Error "Target filename missing." return } $OBJARRAY = @($INPUT) if ($OBJARRAY.Count -eq 0) { Write-Error "Source filename list missing." return } $OBJWRITER = New-Object System.IO.BinaryWriter([System.IO.File]::Create($Path)) $OBJARRAY | ForEach-Object { "Appending $_ to $Path." $OBJREADER = New-Object System.IO.BinaryReader([System.IO.File]::Open($_, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read)) $OBJWRITER.BaseStream.Position = $OBJWRITER.BaseStream.Length $OBJREADER.BaseStream.CopyTo($OBJWRITER.BaseStream) $OBJWRITER.BaseStream.Flush() $OBJREADER.Close() } $OBJWRITER.Close() } |