rb_io_stdio_file 651 ext/fiddle/pointer.c fp = rb_io_stdio_file(fptr); rb_io_stdio_file 377 ext/objspace/objspace_dump.c dc->stream = rb_io_stdio_file(fptr); rb_io_stdio_file 128 include/ruby/io.h FILE *rb_io_stdio_file(rb_io_t *fptr);