在 Powershell 中，如何拆分大型二进制文件? [英] In Powershell, How do I split a large binary file?

问题描述

我已经在别处看到了文本文件的答案，但我需要为压缩文件执行此操作.

I've seen the answer elsewhere for text files, but I need to do this for a compressed file.

我有一个 6G 的二进制文件，需要拆分为 100M 的块.我是否在某处错过了 unix 的头"的模拟?

I've got a 6G binary file which needs to be split into 100M chunks. Am I missing the analog for unix's "head" somewhere?

推荐答案

没关系.给你:

function split($inFile,  $outPrefix, [Int32] $bufSize){

  $stream = [System.IO.File]::OpenRead($inFile)
  $chunkNum = 1
  $barr = New-Object byte[] $bufSize

  while( $bytesRead = $stream.Read($barr,0,$bufsize)){
    $outFile = "$outPrefix$chunkNum"
    $ostream = [System.IO.File]::OpenWrite($outFile)
    $ostream.Write($barr,0,$bytesRead);
    $ostream.close();
    echo "wrote $outFile"
    $chunkNum += 1
  }
}

假设:bufSize 适合内存.

Assumption: bufSize fits in memory.

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