[M3devel] Posix < 0 vs. # 0 vs. = -1?

[Tony Hosking]

Checking < 0 is much cheaper than checking = -1.
C idioms typically check < 0.
-1 is simply a convenient negative value to return.
Leave it as is.



On 18 Apr 2010, at 09:57, Jay K wrote:

> Posix often says:
>  function foo() returns 0 for success, -1 for error
>  
>  m3core/libm3/etc, often say if foo() < 0 or if foo() # 0 "instead".
>  Generally ok to tighten these up to "= -1", perhaps upon checking manpages,
>   or a known rat's nest of inconsistencies?
> 
>  - Jay
> 

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