rb_str_buf_new_cstr  657 include/ruby/intern.h #define rb_str_buf_new_cstr(str) __extension__ ( \
rb_str_buf_new_cstr   40 string.c       #undef rb_str_buf_new_cstr
rb_str_buf_new_cstr  728 string.c       rb_str_buf_new_cstr(const char *ptr)