ref: 37e4ca9b85b68ca0441c18c2f4fbf24c866e38cb dir: /lib/c/src/isgraph.c/
#define __USE_MACROS #include <ctype.h> #undef isgraph int isgraph(int c) { return (__ctype+1)[c] & (_P|_U|_L|_D); }