/usr/include/tjutils/tjindex.h is in libodin-dev 1.8.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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tjindex.h - description
-------------------
begin : Tue Aug 13 2002
copyright : (C) 2000-2014 by Thies H. Jochimsen
email : thies@jochimsen.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef TJINDEX_H
#define TJINDEX_H
#include <tjutils/tjutils.h>
#include <tjutils/tjstatic.h>
#include <tjutils/tjlabel.h>
#include <tjutils/tjhandler.h>
/**
* @addtogroup tjutils
* @{
*/
class Index {
public:
static const char* get_compName();
};
//////////////////////////////////////////////////////////
// mapping between UniquIndex types and typenames
struct UniqueIndexMap : public STD_map<STD_string, STD_list<unsigned int> >, public Labeled {
UniqueIndexMap() : contiguous(true) {}
unsigned int get_index(STD_list<unsigned int>::iterator& index, const STD_string& type, unsigned int max_instances);
void remove_index(const STD_list<unsigned int>::iterator& index, const STD_string& type);
private:
bool contiguous; // cache whether list of indices is contiguous for fast assignment of indices
unsigned int assign_index(STD_list<unsigned int>::iterator& index, const STD_string& type); // Get the next lowest index which is available
};
//////////////////////////////////////////////////////////
// keeps track of all index lists
class UniqueIndexBase : public StaticHandler<UniqueIndexBase> {
public:
// for StaticHandler
static void init_static() {indices_map.init("indices_map");}
static void destroy_static() {indices_map.destroy();}
protected:
UniqueIndexBase() {} // Use only as base class
static SingletonHandler<UniqueIndexMap,true> indices_map; // global lists of indices
};
//////////////////////////////////////////////////////////
/**
* This template class provides a unique index, i.e. an unique
* unsigned integer number for all instances of the (derived) class.
* A new index for the object is created whenever a call to 'get_index()'
* is issued the first time. The assigned index is removed from the list
* of assigned indices if the object is destroyed.
* Please note that the index of temporary objects is deleted from
* the list of indices, even it is assigned to another object.
* The class T must have two static member functions, 'get_typename()'
* and 'get_max_instances()' to return a unique label and the
* maximum number of instances per class, respectively.
*/
template<class T>
class UniqueIndex : public UniqueIndexBase {
public:
UniqueIndex() {init();}
UniqueIndex(const UniqueIndex<T>&) {init();}
UniqueIndex<T>& operator = (const UniqueIndex<T>&) {erase(); init(); return *this;}
~UniqueIndex() {erase();}
/**
* Returns a unique index for this object.
*/
unsigned int get_index() const {
return indices_map->get_index(index, T::get_typename(), T::get_max_instances());
}
private:
void init() { // Start with unassigned index (pointing to end())
index=indices_map->operator[](T::get_typename()).end();
}
void erase() { // Remove index
indices_map->remove_index(index, T::get_typename());
}
mutable STD_list<unsigned int>::iterator index;
};
/** @}
*/
#endif
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