Open-USB-Extreme/lib/dusbextreme.d

module dusbextreme;
import std.stdint;

enum USBEXTREME_NAME_LENGTH = 32;
enum USBEXTREME_ID_LENGTH = 15;
enum USBEXTREME_NAME_EXT_LENGTH = 10;
enum USBEXTREME_MAGIC = 0x08;
enum USBEXTREME_HEADER_SIZE = usb_extreme_base.sizeof;

struct usb_extreme_base {
    uint8_t[6 + USBEXTREME_ID_LENGTH + USBEXTREME_NAME_LENGTH] empty;
    uint8_t magic;
    uint8_t[10] empty2;
}

extern(C) int is_oue(immutable(void)* headers, immutable(size_t) headerslen) {
    immutable headers_oeu = cast(immutable usb_extreme_base*) headers;
    immutable headers_nlen = headerslen / USBEXTREME_HEADER_SIZE;
    
    for (auto i = 0; i < headers_nlen; i++) {
        immutable header = headers_oeu[i];
        
        if (header.magic != USBEXTREME_MAGIC) {
            return 0;
        }
    }
    
    return 1;
}