shithub: scc

ref: 640caa73c7b211720c1ffa5cd81aba2ea63cb130
dir: /lib/c/isupper.c/

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#define __USE_MACROS
#include <ctype.h>
#undef isupper

int
isupper(int c)
{
	return (__ctype+1)[c] & _U;
}