从文本文件中的字节偏移确定行号 [英] Determine Line Number from Byte Offset in a text file

问题描述

我目前有一个场景，我知道文本文件的字节偏移量。我想知道无论如何我可以从字节偏移中确定行号。文本文件中的记录不是固定长度，在这种情况下，我会将偏移量除以宽度。

I currently have a scenario where I know the byte offset of a text file. I want to know is there anyway in which I can determine the line number from the byte offset. The records in the text file are not of fixed length, in which case I would have divided the offset by the width.

推荐答案

除非所有行都是统一长度，否则无法从字节偏移量确定行号。但是，您可以扫描换行并跟踪它们以计算文件中的偏移量。

You cannot determine the line number from byte offset unless all the lines are a uniform length. However you can scan for newlines and keep track of them to calculate the offset in the file.

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