ref: 1e3dd27b9b1dcd2c8f16a0f51effaade0e12c227 dir: /lib/c/src/isprint.c/
#define __USE_MACROS #include <ctype.h> #undef isprint int isprint(int c) { return __ctype[(unsigned char) c] & (_P|_U|_L|_D|_SP); }