PATCH: reduce strlen() calls

[Mark Mitchell]

> I think, that's what `write_string` macro is doing. But if a string size
> is fixed, why run strlen() to measure it?

1. It makes it easy to get the right answer.

2. It makes the code more robust -- you do not have to remember to change
   the number.

3. It is not any slower; GCC will optimize away the call to strlen anyhow.

-- 
Mark Mitchell                mark@codesourcery.com
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