395 		size_t write_offset;  in bio_write()  local
400 		write_offset = b->offset + b->len;  in bio_write()
401 		if (write_offset >= b->size)  in bio_write()
402 			write_offset -= b->size;  in bio_write()
405 		if (write_offset + rest <= b->size)  in bio_write()
409 			chunk = b->size - write_offset;  in bio_write()
411 		memcpy(b->buf + write_offset, buf, chunk);  in bio_write()
435 	size_t write_offset;  in bio_nwrite0()  local
463 	write_offset = b->offset + b->len;  in bio_nwrite0()
464 	if (write_offset >= b->size)  in bio_nwrite0()
465 		write_offset -= b->size;  in bio_nwrite0()
466 	if (write_offset + num > b->size)  in bio_nwrite0()
470 		num = b->size - write_offset;  in bio_nwrite0()
473 		*buf = b->buf + write_offset;  in bio_nwrite0()
474 	assert(write_offset + num <= b->size);  in bio_nwrite0()