zircon/bootloader/src/device_id.c

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "device_id.h"

#include <stdio.h>
#include <string.h>

#include "eff_short_wordlist_1.h"

#define APPEND_WORD(NUM, SEP)       \
  word = dictionary[(NUM) % 1296];  \
  memcpy(dest, word, strlen(word)); \
  dest += strlen(word);             \
  *dest = SEP;                      \
  dest++;

void device_id(mac_addr addr, char out[DEVICE_ID_MAX]) {
  const char* word;
  char* dest = out;
  APPEND_WORD(addr.x[0] | ((addr.x[4] << 8) & 0xF00), '-');
  APPEND_WORD(addr.x[1] | ((addr.x[5] << 8) & 0xF00), '-');
  APPEND_WORD(addr.x[2] | ((addr.x[4] << 4) & 0xF00), '-');
  APPEND_WORD(addr.x[3] | ((addr.x[5] << 4) & 0xF00), 0);
}