// ISC License
// 
// Copyright (c) 2024 Stephen Seo
// 
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// 
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include "big_endian.h"

int is_big_endian(void) {
  union {
    int i;
    char c[4];
  } bint = {0x01020304};

  return bint.c[0] == 1 ? 1 : 0;
}

unsigned short u16_be_swap(unsigned short value) {
  if (is_big_endian()) {
    return value;
  } else {
    return ((value >> 8) & 0xFF) | ((value << 8) & 0xFF00);
  }
}

// vim: ts=2 sts=2 sw=2