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      1 /**
      2  * @file comma_list.h
      3  * Container holding items from a list of comma separated items
      4  *
      5  * @remark Copyright 2003 OProfile authors
      6  * @remark Read the file COPYING
      7  *
      8  * @author Philippe Elie
      9  */
     10 
     11 #ifndef COMMA_LIST_H
     12 #define COMMA_LIST_H
     13 
     14 #include <string>
     15 #include <vector>
     16 
     17 #include "string_manip.h"
     18 
     19 /**
     20  * hold a list of item of type T, tracking also if item has been set.
     21  */
     22 template <class T>
     23 class comma_list
     24 {
     25 public:
     26 	comma_list();
     27 
     28 	/**
     29 	 * @param str  list of comma separated item
     30 	 *
     31 	 * setup items array according to str parameters. Implement PP:3.17
     32 	 * w/o restriction on charset and with the special string all which
     33 	 * match anything.
     34 	 */
     35 	void set(std::string const & str);
     36 
     37 	/// return true if a specific value is held by this container
     38 	bool is_set() const {
     39 		return !is_all;
     40 	}
     41 
     42 	/**
     43 	 * @param value  the value to test
     44 	 *
     45 	 * return true if value match one the stored value in items
     46 	 */
     47 	bool match(T const & value) const;
     48 
     49 private:
     50 	typedef T value_type;
     51 	typedef std::vector<value_type> container_type;
     52 	typedef typename container_type::const_iterator const_iterator;
     53 	bool is_all;
     54 	container_type items;
     55 };
     56 
     57 
     58 template <class T>
     59 comma_list<T>::comma_list()
     60 	: is_all(true)
     61 {
     62 }
     63 
     64 
     65 template <class T>
     66 void comma_list<T>::set(std::string const & str)
     67 {
     68 	items.clear();
     69 
     70 	is_all = false;
     71 
     72 	std::vector<std::string> result = separate_token(str, ',');
     73 	for (size_t i = 0 ; i < result.size() ; ++i) {
     74 		if (result[i] == "all") {
     75 			is_all = true;
     76 			items.clear();
     77 			break;
     78 		}
     79 		items.push_back(op_lexical_cast<T>(result[i]));
     80 	}
     81 }
     82 
     83 
     84 template <class T>
     85 bool comma_list<T>::match(T const & value) const
     86 {
     87 	if (is_all)
     88 		return true;
     89 
     90 	const_iterator cit = items.begin();
     91 	const_iterator const end = items.end();
     92 
     93 	for (; cit != end; ++cit) {
     94 		if (value == *cit)
     95 			return true;
     96 	}
     97 
     98 	return false;
     99 }
    100 
    101 
    102 #endif /* !COMMA_LIST_H */
    103