Re: xxd -i vs DIY Was: C23 thoughts and opinions

On Mon, 3 Jun 2024 07:49:00 -0000 (UTC)
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Wed, 29 May 2024 21:31:54 +0100, bart wrote:
 

Conclusion: beating xxd is apparently not hard if even a scripting
language can do so. I wonder what slows it down? 

 
It’s written in a very stdio-dependent vanilla C style.
 

So are all our [much much faster] mini-utils.

Have a look at the source for yourself. It’s part of the “vim”
package on Debian and no doubt other distros. The xxd binary itself
is built from a single source file of just some 1200 lines, and the
hex-to-binary conversion is done in a function called “huntype” of
just 133 lines.

The question was about binary-to-hex rather than hex-to-binary.

BTW, it seems that 'xxd -i -r' does not work at all. Or, at least, I was
unable to figure out right combination of flags.