The ctype functions isspace() and friends are unaware of whether the compiler is set to treat chars as signed or unsigned. So things like isspace('µ') produce random results depending on what is in memory before the _pctype array.

Should ALL the macros in ctype.h cast to unsigned char? Curiously, the isleadbyte() macro already does.

John Jameson skrev:
> The ctype functions isspace() and friends are unaware of whether
> the compiler is set to treat chars as signed or unsigned. So things
> like isspace('�') produce random results depending on what is in
> memory before the _pctype array.
> 
> Should ALL the macros in ctype.h cast to unsigned char? Curiously,
> the isleadbyte() macro already does.

You should cast the argument to the macros/functions in ctype.h
to unsigned.

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