// Parses a field from bytes starting from position 'start' and ending at 'end'.
// Advances 'start' to the start of the next field. Throws if there is no field between
// start and end.
public static Field ParseField(byte[] bytes, ref int start, int end)
{
int fieldMiddle = Find(Delimiters.TagValueSeparator, bytes, start, end);
int fieldEnd = Find(Delimiters.FieldDelimiter, bytes, fieldMiddle + 1, end);
var res = new Field(
new ArraySegment<byte>(bytes, start, fieldMiddle - start),
new ArraySegment<byte>(bytes, fieldMiddle + 1, fieldEnd - fieldMiddle - 1));
start = fieldEnd + 1;
return res;
}
static void WriteField(Stream strm, Field field, ref byte checksum, StringBuilder log)
{
if (log != null)
{
log.Append(field);
log.Append((char)Delimiters.FieldDelimiter);
}
WriteBytes(strm, field.Tag, ref checksum);
WriteByte(strm, Delimiters.TagValueSeparator, ref checksum);
WriteBytes(strm, field.Value, ref checksum);
WriteByte(strm, Delimiters.FieldDelimiter, ref checksum);
}