From: Avdi Grimm <avdi@...>
Date: 2008-04-29T01:56:30+09:00
Subject: Re: Transpose a large file(>2GB)

On Mon, Apr 28, 2008 at 12:47 PM, Avdi Grimm <avdi@avdi.org> wrote:
>  fseek to the end of the file.  fseek backwards by a nice round number
>  like 4k.  Read in that exact number of bytes.  Transpose it.  Write
>  the transposed block to your output file.  Then fseek back 2*4k.
>  Read, transpose, write.  fseek back 3*4k.  Etc.  Rinse and repeat to
>  the beginning of the file.

Of course, if you're transposing lines, that's trickier.

-- 
Avdi

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