This file is indexed.

/usr/include/libmints/ref.h is in libpsi3-dev 3.4.0-6+b1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
#ifndef _psi_src_lib_libmints_ref_h_
#define _psi_src_lib_libmints_ref_h_

/*!
    \file libmints/ref.h
    \ingroup MINTS
*/

#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <assert.h>

namespace psi {
    
// For most object counted by Refs we can use the following simple object policy:
class StandardObjectPolicy {
public:
	template<typename T> void dispose(T* object) {
		delete object;
	}
};

// Clearly, the above policy will not work for arrays allocated with operator new[].
// A replacement policy for this case is trival, fortunately:
class StandardArrayPolicy {
public:
	template<typename T> void dispose(T* array) {
		delete[] array;
	}
};

class SimpleReferenceCount {
private:
	size_t* _counter;
public:
	SimpleReferenceCount() {
		_counter = NULL;
	}
	
public:
	template<typename T> void init(T*) {
		_counter = ::new size_t;
		*_counter = 1;
	}
	
	template<typename T> void dispose(T*) {
		::delete _counter;
	}
	
	template<typename T> void increment(T*) {
		++*_counter;
	}
	
	template<typename T> void decrement(T*) {
		--*_counter;
	}
	
	template<typename T> bool is_zero(T*) {
		return *_counter == 0;
	}
};
// Reference counting pointer:
template<typename T, typename CounterPolicy = SimpleReferenceCount, typename ObjectPolicy = StandardObjectPolicy>
class Ref : private CounterPolicy, private ObjectPolicy {
protected:
    // shortcuts
    typedef CounterPolicy CP;
    typedef ObjectPolicy  OP;

    T* _object_pointed_to;		// Object referred to (or NULL if none)

public:
    // default constructor
    Ref() {
        _object_pointed_to = NULL;
    }

    // Test of copy constructor
    Ref(T* p) {
        _object_pointed_to = NULL;
        if (p) {
            init(p);
        }
    }

    // explicit Ref(T* p) {
    //     init(p);
    // }

    Ref(Ref<T, CP, OP> const& cp) : CP((CP const&) cp), OP((OP const&)cp) {
        _object_pointed_to = NULL;
        attach(cp);
    }

    ~Ref() {
        detach();
    }

    Ref<T,CP,OP>& operator= (T* p) {
        assert(p != _object_pointed_to);
        detach();
        init(p);
        return *this;
    }

    Ref<T,CP,OP>& operator= (Ref<T,CP,OP> const& cp) {
        if (_object_pointed_to != cp._object_pointed_to) {
            detach();
            CP::operator=((CP const&)cp);
            OP::operator=((OP const&)cp);
            attach(cp);
        }
        return *this;
    }

    T* operator-> () const {
        return _object_pointed_to;
    }

    T& operator* () const {
        return *_object_pointed_to;
    }

    operator T*() const { return _object_pointed_to; }
    
    T* pointer() const {
        #ifdef DEBUG
        assert(_object_pointed_to != NULL);
        #endif
        return _object_pointed_to;
    }

    T& operator[] (int i) const {
        return _object_pointed_to[i];
    }
private:
    void init(T* p) {
        if (p != NULL) {
            CounterPolicy::init(p);
        }
        _object_pointed_to = p;
    }

    void attach(Ref<T,CP,OP> const& cp) {
        _object_pointed_to = cp._object_pointed_to;
        if (cp._object_pointed_to != NULL) {
            CounterPolicy::increment(cp._object_pointed_to);
        }
    }

    void detach() {
        if (_object_pointed_to != NULL) {
            CounterPolicy::decrement(_object_pointed_to);
            if (CounterPolicy::is_zero(_object_pointed_to)) {
                CounterPolicy::dispose(_object_pointed_to);
                ObjectPolicy::dispose(_object_pointed_to);
            }
        }
    }
};

}

#endif /*Ref_H_*/