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#include <iostream>
#include <itpp/base/circular_buffer.h>
#include <itpp/base/random.h>
using namespace std;
using namespace itpp;
int main()
{
//Set a fixed seed to the random number generator
RNG_reset(12345);
int nrof_elements;
ivec index_vec;
vec a = randn(3);
vec b = randn(8);
vec out_vec;
double out;
Array <double> out_array;
Circular_Buffer<double> cb1(10);
//Put the elements of a to the buffer
cb1.put(a);
//Vector output: Peek at the two oldest elements of the buffer (the two first extracted)
cb1.peek(out_vec,2);
cout << "peek(out_vec,2) = " << out_vec << ": display 2 first elements of the buffer, without affecting the content" << endl;
//Vector output: Peek at all elements of the buffer in reverse order
cb1.peek_reverse(out_vec);
cout << "peek_reverse(out_vec,-1) = " << out_vec << ": display buffer, without affecting the content" << endl;
//Array output: Peek at all elements of the buffer in reverse order
cb1.peek_reverse(out_array);
cout << "peek_reverse(out_array,-1) = " << out_array << ": display buffer, without affecting the content" << endl;
//Put the elements of \c b to the buffer
cb1.put(b);
//Extract the oldest element of the buffer
cb1.get(out_vec,1);
cout << "get(out_vec,1) = " << out_vec << endl ;
//Extract all element of the buffer
cb1.get(out_vec);
cout << "get(out_vec) = " << out_vec << endl ;
cb1.get(out_vec);
cb1.get(out_array,0);
cout << "get(out_vec) = " << out_vec;
cout << "; get(out_array,0) = " << out_array << ": empty buffer, no content" << endl;
for (int i=0;i<a.length();i++) { cb1.put(a(i)); }
for (int i=0;i<b.length();i++) { cb1.put(b(i)); }
cout << "buffer size = " << cb1.size() << endl;
cout << "nrof_elements = " << cb1.nrof_elements() << endl;
nrof_elements=cb1.nrof_elements();
for (int i=0;i<nrof_elements;i++) {
cout << "i = " << i;
cout << ": peek() = " << cb1.peek();
cout << "; peek_reverse() = " << cb1.peek_reverse();
cout << "; get() = " << cb1.get();
cout << endl;
}
//Test of error handling
//cout << "get() = " << cb1.get() << endl;
cb1.put(b);
cout << "buffer size = " << cb1.size() << endl;
cout << "nrof_elements = " << cb1.nrof_elements() << endl;
cb1.peek(out_vec,-1);
cout << "peek(out_vec) = " << out_vec << endl;
index_vec="5 3 7 1";
for (int i=0;i<index_vec.size();i++) {
cb1.peek(index_vec(i),out);
cout << "peek at index " << index_vec(i);
cout << ": peek(" << index_vec(i) << ") = " << out << endl;
}
cb1.peek(index_vec,out_vec);
cout << "peek at indices " << index_vec << ":"<< endl;
cout << "peek(index_vec,out_vec) = " << out_vec << endl;
cb1.set_size(15,true);
cout << "buffer size = " << cb1.size() << endl;
cout << "nrof_elements = " << cb1.nrof_elements() << endl;
cb1.peek(out_vec,-1);
cout << "peek(out_vec) = " << out_vec << endl;
cb1.set_size(5,true);
cout << "buffer size = " << cb1.size() << endl;
cout << "nrof_elements = " << cb1.nrof_elements() << endl;
cb1.peek(out_vec,-1);
cout << "peek(out_vec) = " << out_vec << endl;
cout << "Copy constructor: " << endl;
Circular_Buffer<double> cb2(cb1);
cb2.peek(out_vec,-1);
cout << "Circular_Buffer<double> cb2(cb1): cb2.peek(out_vec) = " << out_vec << endl;
cout << "Copy operator: " << endl;
Circular_Buffer<double> cb3=cb1;
cb3.peek(out_array,-1);
cout << "Circular_Buffer<double> cb3=cb1: cb3.peek(out_array) = " << out_array << endl;
return 0;
}
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