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I also moved the isprint case to the correct position.
This adds a FIXME to our lua code from sword25, which uses iscntrl directly.
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On some systems, passing signed chars to macros like isspace() etc. lead
to a runtime error. Hence, mark these macros as forbidden by default,
and introduce otherwise equivalent alternatives for them.
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This fixes a potential problem with passing char values that would be sign-extended and yield unexpected results.
See http://msdn.microsoft.com/en-us/library/ms245348.aspx
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The trydecpoint() function *is* used, though probably only in
countries which don't use a decimal point. We can't use the ISO C
locale functions here because they're not fully implemented on
some platforms, e.g. Android. Hopefully this method will work.
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svn-id: r53568
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