I hope this is not too much off topic.
Time ago, Edmund Grimley Evans asked what should be the value of this
expression:
mbrtowc(&wc, "", 0, &ps)
I have two other similar questions for cases that seems unspecified:
1) What should the function do when passed a NULL as the last argument?
Should it use an internal mbstate_t variable or not? What should it return?
2) What should it do and return if a mbstate_t is supplied that contains
invalid state values (as it may happen with, e.g., an uninitialized local
variable)?
TIA.
_ Marco
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