/* --------------------------------------------------------------------------
CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-16 Bradley M. Bell

CppAD is distributed under the terms of the
             Eclipse Public License Version 2.0.

This Source Code may also be made available under the following
Secondary License when the conditions for such availability set forth
in the Eclipse Public License, Version 2.0 are satisfied:
      GNU General Public License, Version 2.0 or later.
---------------------------------------------------------------------------- */
/*
$begin double_sparse_jacobian.cpp$$
$spell
    const
    onetape
    boolsparsity
    yp
    jac
    Jacobian
    fp
    bool
    cppad
    hpp
    CppAD
    cmath
    exp
    std
$$

$section Double Speed: Sparse Jacobian$$


$head Specifications$$
See $cref link_sparse_jacobian$$.

$head Implementation$$

$srccode%cpp% */
# include <cppad/utility/vector.hpp>
# include <cppad/speed/uniform_01.hpp>
# include <cppad/speed/sparse_jac_fun.hpp>

// Note that CppAD uses global_option["memory"] at the main program level
# include <map>
extern std::map<std::string, bool> global_option;

bool link_sparse_jacobian(
    size_t                           size     ,
    size_t                           repeat   ,
    size_t                           m        ,
    const CppAD::vector<size_t>&     row      ,
    const CppAD::vector<size_t>&     col      ,
          CppAD::vector<double>&     x        ,
          CppAD::vector<double>&     jacobian ,
          size_t&                    n_sweep  )
{
    if(global_option["onetape"]||global_option["atomic"]||global_option["optimize"]||global_option["boolsparsity"])
        return false;
    // -----------------------------------------------------
    // setup
    using CppAD::vector;
    size_t i;
    size_t order = 0;          // order for computing function value
    size_t n     = size;       // argument space dimension
    vector<double> yp(m);      // function value yp = f(x)

    // ------------------------------------------------------
    while(repeat--)
    {   // choose a value for x
        CppAD::uniform_01(n, x);

        // computation of the function
        CppAD::sparse_jac_fun<double>(m, n, x, row, col, order, yp);
    }
    for(i = 0; i < m; i++)
        jacobian[i] = yp[i];

    return true;
}
/* %$$
$end
*/
