- _mime_header_decode/
- _unicode_caseflip/
- _unicode_check/
- decode_entities/
- drupal_convert_to_utf8/
- drupal_strlen/
- drupal_strtolower/
- drupal_strtoupper/
- drupal_substr/
- drupal_truncate_bytes/
- drupal_ucfirst/
- drupal_xml_parser_create/
- mime_header_decode/
- mime_header_encode/
- truncate_utf8/
- unicode_check/
- unicode_requirements/