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@@ -97,10 +97,44 @@ |
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/// @{ |
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///A counter class |
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/// A counter class |
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///This class makes it easier to count certain events. You can increment |
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///or decrement the counter using operator++ and operator--. |
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///A report is automatically printed on destruction. |
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///\todo More doc |
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/// This class makes it easier to count certain events (e.g. for debug |
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/// reasons). |
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/// You can increment or decrement the counter using \c operator++, |
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/// \c operator--, \c operator+= and \c operator-=. You can also |
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/// define subcounters for the different phases of the algorithm or |
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/// for different types of operations. |
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/// A report containing the given title and the value of the counter |
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/// is automatically printed on destruction. |
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/// |
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/// The following example shows the usage of counters and subcounters. |
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/// \code |
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/// // Bubble sort |
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/// std::vector<T> v; |
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/// ... |
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/// Counter op("Operations: "); |
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/// Counter::SubCounter as(op, "Assignments: "); |
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/// Counter::SubCounter co(op, "Comparisons: "); |
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/// for (int i = v.size()-1; i > 0; --i) { |
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/// for (int j = 0; j < i; ++j) { |
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/// if (v[j] > v[j+1]) { |
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/// T tmp = v[j]; |
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/// v[j] = v[j+1]; |
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/// v[j+1] = tmp; |
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/// as += 3; // three assignments |
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/// } |
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/// ++co; // one comparison |
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/// } |
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/// } |
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/// \endcode |
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/// |
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/// This code prints out something like that: |
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/// \code |
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/// Comparisons: 45 |
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/// Assignments: 57 |
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/// Operations: 102 |
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/// \endcode |
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/// |
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/// \sa NoCounter |
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class Counter |
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{ |
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@@ -109,24 +143,49 @@ |
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int count; |
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public: |
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///\e |
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/// |
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/// SubCounter class |
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/// This class can be used to setup subcounters for a \ref Counter |
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/// to have finer reports. A subcounter provides exactly the same |
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/// operations as the main \ref Counter, but it also increments and |
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/// decrements the value of its parent. |
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/// Subcounters can also have subcounters. |
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/// |
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/// The parent counter must be given as the first parameter of the |
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/// constructor. Apart from that a title and an \c ostream object |
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/// can also be given just like for the main \ref Counter. |
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/// |
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/// A report containing the given title and the value of the |
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/// subcounter is automatically printed on destruction. If you |
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/// would like to turn off this report, use \ref NoSubCounter |
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/// instead. |
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/// |
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/// \sa NoSubCounter |
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typedef _SubCounter<Counter> SubCounter; |
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///\e |
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/// |
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/// SubCounter class without printing report on destruction |
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/// This class can be used to setup subcounters for a \ref Counter. |
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/// It is the same as \ref SubCounter but it does not print report |
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/// on destruction. (It modifies the value of its parent, so 'No' |
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/// only means 'do not print'.) |
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/// |
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/// Replacing \ref SubCounter "SubCounter"s with \ref NoSubCounter |
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/// "NoSubCounter"s makes it possible to turn off reporting |
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/// subcounter values without actually removing the definitions |
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/// and the increment or decrement operators. |
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/// |
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/// \sa SubCounter |
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typedef _NoSubCounter<Counter> NoSubCounter; |
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/// |
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/// Constructor. |
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Counter() : _title(), _os(std::cerr), count(0) {} |
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/// |
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/// Constructor. |
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Counter(std::string title,std::ostream &os=std::cerr) |
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: _title(title), _os(os), count(0) {} |
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/// |
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/// Constructor. |
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Counter(const char *title,std::ostream &os=std::cerr) |
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: _title(title), _os(os), count(0) {} |
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///Destructor. Prints the given title and the value of the counter. |
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/// Destructor. Prints the given title and the value of the counter. |
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~Counter() { |
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_os << _title << count <<std::endl; |
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///\e |
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Counter &operator-=(int c) { count-=c; return *this;} |
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/// |
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/// Resets the counter to the given value. |
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void reset(int c=0) {count=c;} |
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/// |
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/// Returns the value of the counter. |
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operator int() {return count;} |
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}; |
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///'Do nothing' version of |
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/// 'Do nothing' version of Counter. |
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///'Do nothing' version of \ref Counter. |
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///\sa Counter |
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/// This class can be used in the same way as \ref Counter however it |
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/// does not count at all and does not print report on destruction. |
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/// |
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/// Replacing a \ref Counter with a \ref NoCounter makes it possible |
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/// to turn off all counting and reporting (SubCounters should also |
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/// be replaced with NoSubCounters), so it does not affect the |
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/// efficiency of the program at all. |
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/// |
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/// \sa Counter |
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class NoCounter |
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{ |
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