RTOp_ROp_norms.c

/*
// @HEADER
// ***********************************************************************
// 
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//  
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
// 
// ***********************************************************************
// @HEADER
*/

#include <math.h>

#include "RTOp_ROp_norms.h"
#include "RTOp_obj_null_vtbl.h"
#include "RTOp_obj_value_vtbl.h"
#include "RTOp_reduct_sum_value.h"
#include "RTOp_reduct_max_value.h"

#define MY_MAX(a,b) a > b ? a : b

/* One norm reduction operator class. */

static int RTOp_ROp_norms_apply_op_norm_1(
  const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
  , const int num_vecs, const struct RTOp_SubVector vecs[]
  , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
  , RTOp_ReductTarget targ_obj )
{
  RTOp_index_type        sub_dim;
  const RTOp_value_type  *v0_val;
  ptrdiff_t              v0_val_s;
  register RTOp_index_type k;
  RTOp_value_type        *norm = NULL;

  /* */
  /* Validate the input */
  /* */
  if( num_vecs != 1 )
    return RTOp_ERR_INVALID_NUM_VECS;
  if( num_targ_vecs != 0 )
    return RTOp_ERR_INVALID_NUM_TARG_VECS;
  assert(targ_obj);
  assert(vecs);

  /* */
  /* Get pointers to data */
  /* */

  /* v0 */
  sub_dim        = vecs[0].sub_dim;
  v0_val         = vecs[0].values;
  v0_val_s       = vecs[0].values_stride;

  /* */
  /* Perform the reduction */
  /* */
  norm = (RTOp_value_type*)targ_obj;
  for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s ) {
    *norm += fabs(*v0_val);  /* ||v[0]||_1 */
  }

  return 0; /* success? */
}

const struct RTOp_RTOp_vtbl_t RTOp_ROp_norm_1_vtbl =
{
  &RTOp_obj_null_vtbl   /* use null type for instance data */
  ,&RTOp_obj_value_vtbl /* use simple scalar type for target object */
  ,"RTOp_ROp_norm_1"
  ,NULL
  ,RTOp_ROp_norms_apply_op_norm_1
  ,RTOp_reduct_sum_value
  ,RTOp_get_reduct_sum_value_op
};

int RTOp_ROp_norm_1_construct( struct RTOp_RTOp* op )
{
  op->vtbl     = &RTOp_ROp_norm_1_vtbl;
  op->obj_data = NULL;
  return 0;
}

RTOp_value_type RTOp_ROp_norm_1_val(RTOp_ReductTarget targ_obj)
{
#ifdef RTOp_DEBUG
  assert(targ_obj != RTOp_REDUCT_OBJ_NULL );
#endif
  return *(RTOp_value_type*)targ_obj;
}

/* Two norm reduction operator class. */

static int RTOp_ROp_norms_apply_op_norm_2(
  const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
  , const int num_vecs, const struct RTOp_SubVector vecs[]
  , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
  , RTOp_ReductTarget targ_obj )
{
  RTOp_index_type        sub_dim;
  const RTOp_value_type  *v0_val;
  ptrdiff_t              v0_val_s;
  register RTOp_index_type k;
  RTOp_value_type        *norm = NULL;

  /* */
  /* Validate the input */
  /* */
  if( num_vecs != 1 )
    return RTOp_ERR_INVALID_NUM_VECS;
  if( num_targ_vecs != 0 )
    return RTOp_ERR_INVALID_NUM_TARG_VECS;
  assert(targ_obj);
  assert(vecs);

  /* */
  /* Get pointers to data */
  /* */

  /* v0 */
  sub_dim        = vecs[0].sub_dim;
  v0_val         = vecs[0].values;
  v0_val_s       = vecs[0].values_stride;

  /* */
  /* Perform the reduction */
  /* */
  norm = (RTOp_value_type*)targ_obj;
  for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s )
    *norm += (*v0_val)*(*v0_val);  /* (||v[0]||_2)^2 */

  return 0; /* success? */
}

const struct RTOp_RTOp_vtbl_t RTOp_ROp_norm_2_vtbl =
{
  &RTOp_obj_null_vtbl   /* use null type for instance data */
  ,&RTOp_obj_value_vtbl /* use simple scalar type for target object */
  ,"RTOp_ROp_norm_2"
  ,NULL
  ,RTOp_ROp_norms_apply_op_norm_2
  ,RTOp_reduct_sum_value
  ,RTOp_get_reduct_sum_value_op
};

int RTOp_ROp_norm_2_construct( struct RTOp_RTOp* op )
{
  op->vtbl     = &RTOp_ROp_norm_2_vtbl;
  op->obj_data = NULL;
  return 0;
}

RTOp_value_type RTOp_ROp_norm_2_val(RTOp_ReductTarget targ_obj)
{
#ifdef RTOp_DEBUG
  assert(targ_obj != RTOp_REDUCT_OBJ_NULL );
#endif
  return sqrt(*(RTOp_value_type*)targ_obj);
}

/* Infinity norm reduction operator class. */

static int RTOp_ROp_norms_apply_op_norm_inf(
  const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
  , const int num_vecs, const struct RTOp_SubVector vecs[]
  , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
  , RTOp_ReductTarget targ_obj )
{
  RTOp_index_type        sub_dim;
  const RTOp_value_type  *v0_val;
  ptrdiff_t              v0_val_s;
  register RTOp_index_type k;
  RTOp_value_type        *norm = NULL;

  /* */
  /* Validate the input */
  /* */
  if( num_vecs != 1 )
    return RTOp_ERR_INVALID_NUM_VECS;
  if( num_targ_vecs != 0 )
    return RTOp_ERR_INVALID_NUM_TARG_VECS;
  assert(targ_obj);
  assert(vecs);

  /* */
  /* Get pointers to data */
  /* */

  /* v0 */
  sub_dim        = vecs[0].sub_dim;
  v0_val         = vecs[0].values;
  v0_val_s       = vecs[0].values_stride;

  /* */
  /* Perform the reduction */
  /* */
  norm = (RTOp_value_type*)targ_obj;
  for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s )
    *norm = MY_MAX( fabs(*v0_val), (*(RTOp_value_type*)targ_obj) );  /* ||v[0]||_inf */

  return 0; /* success? */
}

const struct RTOp_RTOp_vtbl_t RTOp_ROp_norm_inf_vtbl =
{
  &RTOp_obj_null_vtbl  /* use null type for instance data */
  ,&RTOp_obj_value_vtbl /* use simple scalar type for target object */
  ,"RTOp_ROp_norm_inf"
  ,NULL
  ,RTOp_ROp_norms_apply_op_norm_inf
  ,RTOp_reduct_max_value
  ,RTOp_get_reduct_max_value_op
};

int RTOp_ROp_norm_inf_construct( struct RTOp_RTOp* op )
{
  op->vtbl     = &RTOp_ROp_norm_inf_vtbl;
  op->obj_data = NULL;
  return 0;
}

RTOp_value_type RTOp_ROp_norm_inf_val(RTOp_ReductTarget targ_obj)
{
#ifdef RTOp_DEBUG
  assert(targ_obj != RTOp_REDUCT_OBJ_NULL );
#endif
  return *(RTOp_value_type*)targ_obj;
}

/* Common functions */

int RTOp_ROp_norm_destroy( struct RTOp_RTOp* op )
{
  op->vtbl = NULL;
  return 0;
}