Achamenes.ID3.Fields.UnicodeTextField.Parse C# (CSharp) Method

        public override int Parse(byte[] data, int offset)
        {
            base.Parse(data, offset);
            Encoding encoder=null;
            if(data[offset]==0xff && data[offset+1]==0xfe)
            {
                encoder=Encoding.Unicode;
            }
            else if(data[offset]==0xfe && data[offset+1]==0xff)
            {
                encoder=Encoding.BigEndianUnicode;
            }
            else
            {
                throw new FieldParsingException(this.GetType(), "Invalid Unicode text field: incorrect BOM character.");
            }

            if(this.IsNullTerminated)
            {
                int nullTerminator=-1;
                for(int i = offset+2;i < data.Length-1;i+=2)
                {
                    if(data[i]==0 && data[i+1]==0)
                    {
                        nullTerminator=i;
                        break;
                    }
                }
                if(nullTerminator==-1 || nullTerminator>=data.Length) // null-terminator was not found.
                {
                    throw new FieldParsingException(this.GetType(), "Invalid Unicode text field: not null terminated.");
                }
                this.Text=encoder.GetString(data, offset+2, nullTerminator-offset-2);
                return nullTerminator-offset+2;
            }
            else
            {
                this.Text=encoder.GetString(data, offset+2, data.Length-offset-2);
                int nullTerminator=this.Text.IndexOf('\0');
                if(nullTerminator!=-1)
                {
                    this.Text=this.Text.Substring(0, nullTerminator);
                }
                return data.Length-offset;
            }
        }