// Copyright (C) 2013 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_ARRAY_tOOLS_H_
#define DLIB_ARRAY_tOOLS_H_

#include "../assert.h"
#include "array_tools_abstract.h"

namespace dlib
{
 template <typename T>
 void split_array (
 T& a,
 T& b,
 double frac
 )
 {
 // make sure requires clause is not broken
 DLIB_ASSERT(0 <= frac && frac <= 1,
 "\t void split_array()"
 << "\n\t frac must be between 0 and 1."
 << "\n\t frac: " << frac
 );

 const unsigned long asize = static_cast<unsigned long>(a.size()*frac);
 const unsigned long bsize = a.size()-asize;

 b.resize(bsize);
 for (unsigned long i = 0; i < b.size(); ++i)
 {
 swap(b[i], a[i+asize]);
 }
 a.resize(asize);
 }
}

#endif // DLIB_ARRAY_tOOLS_H_