ref: e2fe38d6738c7d231fd926a36a0b1e173af7f2d2 dir: /lib/c/isprint.c/
#define __USE_MACROS #include <ctype.h> #undef isprint int isprint(int c) { return (__ctype+1)[c] & (_P|_U|_L|_D|_SP); }