ref: 6ed60e4e77c4c59fdd0aa27fb6b9af2be9658faf dir: /lib/c/isgraph.c/
#define __USE_MACROS #include <ctype.h> #undef isgraph int isgraph(int c) { return (__ctype+1)[c] & (_P|_U|_L|_D); }