// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright 2014-2017 browserify-aes contributors. All rights reserved. MIT license.
// Copyright 2013 Maxwell Krohn. All rights reserved. MIT license.
// Copyright 2009-2013 Jeff Mott. All rights reserved. MIT license.

export function incr32(iv) {
  let len = iv.length;
  let item;
  while (len--) {
    item = iv.readUInt8(len);
    if (item === 255) {
      iv.writeUInt8(0, len);
    } else {
      item++;
      iv.writeUInt8(item, len);
      break;
    }
  }
}