ref: e6baf91cf4a7df1de7d0d64688cf3f5ed0b89d1a 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); }