// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2013 Google Inc. All rights reserved.
// http://code.google.com/p/ceres-solver/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
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//   this list of conditions and the following disclaimer.
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//   and/or other materials provided with the distribution.
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//
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// Author: sameeragarwal@google.com (Sameer Agarwal)

#include "ceres/preconditioner.h"
#include "glog/logging.h"

namespace ceres {
namespace internal {

Preconditioner::~Preconditioner() {
}

SparseMatrixPreconditionerWrapper::SparseMatrixPreconditionerWrapper(
    const SparseMatrix* matrix)
    : matrix_(CHECK_NOTNULL(matrix)) {
}

SparseMatrixPreconditionerWrapper::~SparseMatrixPreconditionerWrapper() {
}

bool SparseMatrixPreconditionerWrapper::UpdateImpl(const SparseMatrix& A,
                                                   const double* D) {
  return true;
}

void SparseMatrixPreconditionerWrapper::RightMultiply(const double* x,
                                                      double* y) const {
  matrix_->RightMultiply(x, y);
}

int  SparseMatrixPreconditionerWrapper::num_rows() const {
  return matrix_->num_rows();
}

}  // namespace internal
}  // namespace ceres