usb_descriptor_fillbuf — fill buffer with descriptors
int usb_descriptor_fillbuf ( | void * | buf, |
| unsigned | buflen, | |
| const struct usb_descriptor_header ** | src); |
bufBuffer to be filled
buflenSize of buf
srcArray of descriptor pointers, terminated by null pointer.
Copies descriptors into the buffer, returning the length or a negative error code if they can't all be copied. Useful when assembling descriptors for an associated set of interfaces used as part of configuring a composite device; or in other cases where sets of descriptors need to be marshaled.