rb_str_buf_new_cstr  839 include/ruby/intern.h #define rb_str_buf_new_cstr(str) RB_GNUC_EXTENSION_BLOCK( \
rb_str_buf_new_cstr   53 string.c       #undef rb_str_buf_new_cstr
rb_str_buf_new_cstr 1194 string.c       rb_str_buf_new_cstr(const char *ptr)