dw_read_u32
error = dw_read_u32(dwbuf, &dav->dav_u32);
error = dw_read_u32(dwbuf, &dav->dav_u32);
error = dw_read_u32(dwbuf, &dav->dav_u32);
error = dw_read_u32(dwbuf, &dav->dav_u32);
static int dw_read_u32(struct dwbuf *, uint32_t *);
if (dw_read_u32(info, &length))