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void kputhex(int out){               const char *hextable = "0123456789ABCDEF";        char buffer[sizeof(int)*2 + 1] = {0};        kputs("0x");        for (int i = 0; i < sizeof(int)*2; i++) {                buffer[sizeof(int)*2 - i] = hextable[out & 0x0F];                kputc(hextable[out & 0x0F]);                out = out >> 4;        }                kputs((char *)buffer);}