shithub: scc

ref: 3102bca6cc3346fec2531740b1af9bb3729ebc3e
dir: /lib/c/isdigit.c/

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

int
isdigit(int c)
{
	return (__ctype+1)[c] & (_D);
}