🚀 go-pugleaf

In article <4hdqn5$8qn@solutions.solon.com>, fred@genesis.demon.co.uk
(Lawrence Kirby) writes about memcmp et al. with n==0:
> Probably. However the result is defined by some rather unfortunate wording in
> the standard:

The intent of the standard has been clarified by a Technical Corrigendum
which adds the following text to the introductory matter in 7.11.1
String Function Conventions:

	Where an argument declared as |size_t n| specifies the length of
	the array for a function, |n| can have the value zero on a call
	to that function.  Unless explicitly stated otherwise in the
	description of a particular function in this subclause, pointer
	arguments on such a call must still have valid values, as
	described in subclause 7.1.7.  On such a call, a function that
	locates a character finds no occurrence, a function that
	compares two character sequences returns zero, and a function
	that copies characters copies zero characters.

Note that this applies to the strn* functions as well as the mem*
functions.
----
Larry Jones, SDRC, 2000 Eastman Dr., Milford, OH  45150-2789  513-576-2070
larry.jones@sdrc.com
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