ref: 128f871fd0d4943b50c2de4b5afcde1b1210ae30 dir: /lib/c/src/isprint.c/
#define __USE_MACROS #include <ctype.h> #undef isprint int isprint(int c) { return (__ctype+1)[c] & (_P|_U|_L|_D|_SP); }