text: #ifndef UTIL_H
  #define UTIL_H
  
  #include "ustring.h"
  
  bool _is_space(CharType c);
  
  bool _is_text_char(CharType c);
  
  bool _is_symbol(CharType c);
  
  bool _is_char(CharType c);
  
  bool _is_number(CharType c);
  
  bool _is_hex_symbol(CharType c);
  
  bool _is_pair_right_symbol(CharType c);
  
  bool _is_pair_left_symbol(CharType c);
  
  bool _is_pair_symbol(CharType c);
  
  CharType _get_right_pair_symbol(CharType c);
  
  CharType _get_left_pair_symbol(CharType c);
  
  bool _is_same_word(CharType a, CharType b);
  
  bool _is_end_of_word(int col, String line);
  
  bool _is_end_of_big_word(int col, String line);
  
  bool _is_beginning_of_word(int col, String line);
  
  bool _is_beginning_of_big_word(int col, String line);
  
  int _find_first_non_blank(String line);
  
  int find_in_line(String line, String c, int from = 0);
  
  String _join_lines(Vector<String> lines);
  
  #endif // UTIL_H
  