test_numbers.h

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// -*- C++ -*-
#ifndef __test_numbers_h__
#define __test_numbers_h__
 
#include <fstream>
#include "base/base.h"
 
namespace CNORXZ
{
    namespace Test
    {
    class Numbers
    {
    private:
        static Vector<Double> sCont;
        static void init()
        {
        std::fstream f(TEST_NUMBER_FILE, f.in); // text file with simple format: size\nnum0\nnum1\n...
        CXZ_ASSERT(f.is_open(), "test number file '" << TEST_NUMBER_FILE << "'not found");
        SizeT nsize;
        f >> nsize;
        sCont.resize(nsize);
        for(SizeT i = 0; i != nsize; ++i){
            f >> sCont[i];
        }
        CXZ_ASSERT(f.good(), "error while reading test number file '" << TEST_NUMBER_FILE << "'");
        f.close();
        }   
        
    public:
 
        static auto begin()
        {
        if(sCont.size() == 0) init();
        return sCont.cbegin();
        }
 
        static auto end()
        {
        if(sCont.size() == 0) init();
        return sCont.cend();
        }
 
        static auto get(SizeT pos, SizeT size)
        {
        auto b = begin()+pos;
        auto e = b+size;
        CXZ_ASSERT(e <= end(), "requested test numbers out of range");
        return Vector<Double>(b,e);
        }
    };
    }
}
 
#endif