从字节数组中删除范围

我有一个文件在byte[]，我需要删除0x1000字节每x偏移量（我有一个偏移量列表）。我有一些代码可以做到，但我想知道是否有更好的方法来做到这一点;从字节数组中删除范围

private byte[] RemoveHashBlocks(byte[] fileArray, STFSExplorer stfs) 
{ 
    long startOffset = StartingOffset; 
    long endOffset = StartingOffset + Size; 

    List<long> hashBlockOffsets = new List<long>(); 
    foreach (xBlockEntry block in stfs._stfsBlockEntry) 
     if (block.IsHashBlock && (block.BlockOffset >= startOffset && block.BlockOffset <= endOffset)) 
      hashBlockOffsets.Add(block.BlockOffset - (hashBlockOffsets.Count * 0x1000)); 

    byte[] newFileAray = new byte[fileArray.Length - (hashBlockOffsets.Count * 0x1000)]; 

    for (int offset = 0; offset < fileArray.Length; offset++) 
     if (hashBlockOffsets[0] == offset) 
     { 
      offset += 0x1000; 
      hashBlockOffsets.RemoveAt(0); 
     } 
     else 
      newFileAray[offset] = fileArray[offset]; 

    return newFileAray; 
}

来源

2012-07-08 Alexander Forbes-Reed

RemoveAt for List或数组重新定位它们。而不是从阵列中删除某些东西来创建一个新的，只复制那些需要的值。 – 2012-07-08 14:07:19

使用LINQ - 'array.Skip（0x1000）.Take（N）.ToArray（）;' - from：http://stackoverflow.com/questions/943635/c-sharp-arrays-getting-a-sub-array -from-AN-现有阵列 – Tisho 2012-07-08 14:11:32

private byte[] RemoveHashBlocks(byte[] fileArray, STFSExplorer stfs) 
{ 
    long startOffset = StartingOffset; 
    long size = Size; 

    MemoryStream ms = new MemoryStream(); 
    long lastBlockEnd = 0; 

    foreach (xBlockEntry block in stfs._stfsBlockEntry) 
    { 
     if (block.IsHashBlock) 
     { 
      long offset = block.BlockOffset - startOffset; 
      if (offset + 0x1000 > 0 && offset < size) 
      { 
       if (offset > lastBlockEnd) 
       { 
        ms.Write(fileArray, (int) lastBlockEnd, 
          (int) (offset - lastBlockEnd)); 
       } 
       lastBlockEnd = offset + 0x1000; 
      } 
     } 
    } 

    if (lastBlockEnd < size) 
    { 
     ms.Write(fileArray, (int) lastBlockEnd, (int) (size - lastBlockEnd)); 
    } 

    return ms.ToArray(); 
}

这是假设stfs._stfsBlockEntry由BlockOffset排序。

来源

2012-07-15 22:46:07

从字节数组中删除范围

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