ref: 371b267234d3eed3c3db5f52bab1a89c83cb08d3 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); }