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#include <iostream>
#include <type_traits>
#include <boost/iterator/transform_iterator.hpp>
#include <boost/range/iterator_range.hpp>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <amgcl/relaxation/runtime.hpp>
#include <amgcl/coarsening/runtime.hpp>
#include <amgcl/solver/runtime.hpp>
#include <amgcl/make_solver.hpp>
#include <amgcl/amg.hpp>
#include <amgcl/backend/builtin.hpp>
#include <amgcl/adapter/crs_tuple.hpp>
#include "amgcl.h"
#ifdef AMGCL_PROFILING
#include <amgcl/profiler.hpp>
namespace amgcl {
profiler<> prof;
}
#endif
//---------------------------------------------------------------------------
typedef amgcl::backend::builtin<double> Backend;
typedef amgcl::amg<Backend, amgcl::runtime::coarsening::wrapper, amgcl::runtime::relaxation::wrapper> AMG;
typedef amgcl::runtime::solver::wrapper<Backend> ISolver;
typedef amgcl::make_solver<AMG, ISolver> Solver;
typedef boost::property_tree::ptree Params;
//---------------------------------------------------------------------------
amgclHandle STDCALL amgcl_params_create() {
return static_cast<amgclHandle>( new Params() );
}
//---------------------------------------------------------------------------
void STDCALL amgcl_params_seti(amgclHandle prm, const char *name, int value) {
static_cast<Params*>(prm)->put(name, value);
}
//---------------------------------------------------------------------------
void STDCALL amgcl_params_setf(amgclHandle prm, const char *name, float value) {
static_cast<Params*>(prm)->put(name, value);
}
//---------------------------------------------------------------------------
void STDCALL amgcl_params_sets(amgclHandle prm, const char *name, const char *value) {
static_cast<Params*>(prm)->put(name, value);
}
//---------------------------------------------------------------------------
void STDCALL amgcl_params_read_json(amgclHandle prm, const char *fname) {
read_json(fname, *static_cast<Params*>(prm));
}
//---------------------------------------------------------------------------
void STDCALL amgcl_params_destroy(amgclHandle prm) {
delete static_cast<Params*>(prm);
}
//---------------------------------------------------------------------------
amgclHandle STDCALL amgcl_precond_create(
int n,
const int *ptr,
const int *col,
const double *val,
amgclHandle prm
)
{
auto A = std::make_tuple(n,
boost::make_iterator_range(ptr, ptr + n + 1),
boost::make_iterator_range(col, col + ptr[n]),
boost::make_iterator_range(val, val + ptr[n])
);
if (prm)
return static_cast<amgclHandle>(new AMG(A, *static_cast<Params*>(prm)));
else
return static_cast<amgclHandle>(new AMG(A));
}
//---------------------------------------------------------------------------
amgclHandle STDCALL amgcl_precond_create_f(
int n,
const int *ptr,
const int *col,
const double *val,
amgclHandle prm
)
{
auto ptr_c = boost::make_transform_iterator(ptr, [](int i){ return i - 1; });
auto col_c = boost::make_transform_iterator(col, [](int i){ return i - 1; });
auto A = std::make_tuple(n,
boost::make_iterator_range(ptr_c, ptr_c + n + 1),
boost::make_iterator_range(col_c, col_c + ptr[n]),
boost::make_iterator_range(val, val + ptr[n])
);
if (prm)
return static_cast<amgclHandle>(new AMG(A, *static_cast<Params*>(prm)));
else
return static_cast<amgclHandle>(new AMG(A));
}
//---------------------------------------------------------------------------
void STDCALL amgcl_precond_apply(amgclHandle handle, const double *rhs, double *x)
{
AMG *amg = static_cast<AMG*>(handle);
size_t n = amgcl::backend::rows(amg->system_matrix());
boost::iterator_range<double*> x_range =
boost::make_iterator_range(x, x + n);
amg->apply(boost::make_iterator_range(rhs, rhs + n), x_range);
}
//---------------------------------------------------------------------------
void STDCALL amgcl_precond_report(amgclHandle handle) {
std::cout << *static_cast<AMG*>(handle) << std::endl;
}
//---------------------------------------------------------------------------
void STDCALL amgcl_precond_destroy(amgclHandle handle) {
delete static_cast<AMG*>(handle);
}
//---------------------------------------------------------------------------
amgclHandle STDCALL amgcl_solver_create(
int n,
const int *ptr,
const int *col,
const double *val,
amgclHandle prm
)
{
auto A = std::make_tuple(n,
boost::make_iterator_range(ptr, ptr + n + 1),
boost::make_iterator_range(col, col + ptr[n]),
boost::make_iterator_range(val, val + ptr[n])
);
if (prm)
return static_cast<amgclHandle>(new Solver(A, *static_cast<Params*>(prm)));
else
return static_cast<amgclHandle>(new Solver(A));
}
//---------------------------------------------------------------------------
amgclHandle STDCALL amgcl_solver_create_f(
int n,
const int *ptr,
const int *col,
const double *val,
amgclHandle prm
)
{
auto ptr_c = boost::make_transform_iterator(ptr, [](int i){ return i - 1; });
auto col_c = boost::make_transform_iterator(col, [](int i){ return i - 1; });
auto A = std::make_tuple(n,
boost::make_iterator_range(ptr_c, ptr_c + n + 1),
boost::make_iterator_range(col_c, col_c + ptr[n]),
boost::make_iterator_range(val, val + ptr[n])
);
if (prm)
return static_cast<amgclHandle>(new Solver(A, *static_cast<Params*>(prm)));
else
return static_cast<amgclHandle>(new Solver(A));
}
//---------------------------------------------------------------------------
void STDCALL amgcl_solver_report(amgclHandle handle) {
std::cout << static_cast<Solver*>(handle)->precond() << std::endl;
}
//---------------------------------------------------------------------------
void STDCALL amgcl_solver_destroy(amgclHandle handle) {
delete static_cast<Solver*>(handle);
}
//---------------------------------------------------------------------------
conv_info STDCALL amgcl_solver_solve(
amgclHandle handle,
const double *rhs,
double *x
)
{
Solver *slv = static_cast<Solver*>(handle);
size_t n = slv->size();
conv_info cnv;
boost::iterator_range<double*> x_range = boost::make_iterator_range(x, x + n);
std::tie(cnv.iterations, cnv.residual) = (*slv)(
boost::make_iterator_range(rhs, rhs + n), x_range
);
return cnv;
}
//---------------------------------------------------------------------------
void STDCALL amgcl_solver_solve_f(
amgclHandle handle,
const double *rhs,
double *x,
conv_info *cnv
)
{
*cnv = amgcl_solver_solve(handle, rhs, x);
}
//---------------------------------------------------------------------------
conv_info STDCALL amgcl_solver_solve_mtx(
amgclHandle handle,
int const * A_ptr,
int const * A_col,
double const * A_val,
const double *rhs,
double *x
)
{
Solver *slv = static_cast<Solver*>(handle);
size_t n = slv->size();
conv_info cnv;
boost::iterator_range<double*> x_range = boost::make_iterator_range(x, x + n);
std::tie(cnv.iterations, cnv.residual) = (*slv)(
std::make_tuple(
n,
boost::make_iterator_range(A_ptr, A_ptr + n + 1),
boost::make_iterator_range(A_col, A_col + A_ptr[n]),
boost::make_iterator_range(A_val, A_val + A_ptr[n])
),
boost::make_iterator_range(rhs, rhs + n), x_range
);
return cnv;
}
//---------------------------------------------------------------------------
void STDCALL amgcl_solver_solve_mtx_f(
amgclHandle handle,
int const * A_ptr,
int const * A_col,
double const * A_val,
const double *rhs,
double *x,
conv_info *cnv
)
{
Solver *slv = static_cast<Solver*>(handle);
size_t n = slv->size();
boost::iterator_range<double*> x_range = boost::make_iterator_range(x, x + n);
auto ptr_c = boost::make_transform_iterator(A_ptr, [](int i){ return i - 1; });
auto col_c = boost::make_transform_iterator(A_col, [](int i){ return i - 1; });
std::tie(cnv->iterations, cnv->residual) = (*slv)(
std::make_tuple(
n,
boost::make_iterator_range(ptr_c, ptr_c + n + 1),
boost::make_iterator_range(col_c, col_c + A_ptr[n]),
boost::make_iterator_range(A_val, A_val + A_ptr[n])
),
boost::make_iterator_range(rhs, rhs + n), x_range
);
}
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