Array.h Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 #ifndef __ARRAY_H__
 #define __ARRAY_H__

 /*
  *  Array.h
  *  zxing
  *
  *  Copyright 2010 ZXing authors All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <vector>

 #include <zxing/common/Counted.h>

 namespace zxing {

 template<typename T> class Array : public Counted {
 protected:
 public:
   std::vector<T> values_;
   Array() {}
   Array(int n) :
       Counted(), values_(n, T()) {
   }
   Array(T const* ts, int n) :
       Counted(), values_(ts, ts+n) {
   }
   Array(T const* ts, T const* te) :
       Counted(), values_(ts, te) {
   }
   Array(T v, int n) :
       Counted(), values_(n, v) {
   }
   Array(std::vector<T> &v) :
       Counted(), values_(v) {
   }
   Array(Array<T> &other) :
       Counted(), values_(other.values_) {
   }
   Array(Array<T> *other) :
       Counted(), values_(other->values_) {
   }
   virtual ~Array() {
   }
   Array<T>& operator=(const Array<T> &other) {
     values_ = other.values_;
     return *this;
   }
   Array<T>& operator=(const std::vector<T> &array) {
     values_ = array;
     return *this;
   }
   T const& operator[](int i) const {
     return values_[i];
   }
   T& operator[](int i) {
     return values_[i];
   }
   int size() const {
     return values_.size();
   }
   bool empty() const {
     return values_.size() == 0;
   }
   std::vector<T> const& values() const {
     return values_;
   }
   std::vector<T>& values() {
     return values_;
   }
   void push_back(T value) {
     values_.push_back(value);
   }
 };

 template<typename T> class ArrayRef : public Counted {
 private:
 public:
   Array<T> *array_;
   ArrayRef() :
       array_(0) {
   }
   explicit ArrayRef(int n) :
       array_(0) {
     reset(new Array<T> (n));
   }
   ArrayRef(T *ts, int n) :
       array_(0) {
     reset(new Array<T> (ts, n));
   }
   ArrayRef(Array<T> *a) :
       array_(0) {
     reset(a);
   }
   ArrayRef(const ArrayRef &other) :
       Counted(), array_(0) {
     reset(other.array_);
   }

   template<class Y>
   ArrayRef(const ArrayRef<Y> &other) :
       array_(0) {
     reset(static_cast<const Array<T> *>(other.array_));
   }

   ~ArrayRef() {
     if (array_) {
       array_->release();
     }
     array_ = 0;
   }

   T const& operator[](int i) const {
     return (*array_)[i];
   }

   T& operator[](int i) {
     return (*array_)[i];
   }

   void reset(Array<T> *a) {
     if (a) {
       a->retain();
     }
     if (array_) {
       array_->release();
     }
     array_ = a;
   }
   void reset(const ArrayRef<T> &other) {
     reset(other.array_);
   }
   ArrayRef<T>& operator=(const ArrayRef<T> &other) {
     reset(other);
     return *this;
   }
   ArrayRef<T>& operator=(Array<T> *a) {
     reset(a);
     return *this;
   }

   Array<T>& operator*() const {
     return *array_;
   }

   Array<T>* operator->() const {
     return array_;
   }

   operator bool () const {
     return array_ != 0;
   }
   bool operator ! () const {
     return array_ == 0;
   }
 };

 } // namespace zxing

 #endif // __ARRAY_H__