/**
* Read (and remove) the UNA segment from the passed string.
*
* @param string $message The EDI message to extract the UNA from
*
* @return void
*/
protected function setupSpecialCharacters(&$message, Tokenizer $tokenizer)
{
if (substr($message, 0, 3) !== "UNA") {
return;
}
# Get the character definitions
$chars = mb_substr($message, 3, 6);
# Remove the UNA segment from the original message
$message = ltrim(mb_substr($message, 9), "\r\n");
$pos = 0;
$tokenizer->setComponentSeparator(mb_substr($chars, $pos++, 1));
$tokenizer->setDataSeparator(mb_substr($chars, $pos++, 1));
$tokenizer->setDecimalPoint(mb_substr($chars, $pos++, 1));
$tokenizer->setEscapeCharacter(mb_substr($chars, $pos++, 1));
mb_substr($chars, $pos++, 1);
$tokenizer->setSegmentTerminator(mb_substr($chars, $pos++, 1));
}
