RTOp_TOp_scale_vector.c

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/*
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// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) Sandia Corporation
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#include "RTOp_TOp_scale_vector.h"
#include "RTOp_obj_value_vtbl.h"
#include "RTOp_obj_null_vtbl.h"

/* Implementation functions for RTOp_RTOp */

static int RTOp_TOp_scale_vector_apply_op(
  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_value_type        alpha = 0.0;
  RTOp_index_type        z_sub_dim;
  RTOp_value_type        *z_val;
  ptrdiff_t              z_val_s;
  register RTOp_index_type k;

  /* */
  /* Validate the input */
  /* */

  if( num_vecs != 0 || vecs != NULL )
    return RTOp_ERR_INVALID_NUM_VECS;
  if( num_targ_vecs != 1 || targ_vecs == NULL )
    return RTOp_ERR_INVALID_NUM_TARG_VECS;
  assert(obj_data);

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

  /* alpha */
  alpha = *((RTOp_value_type*)obj_data);

  /* z */
  z_sub_dim     = targ_vecs[0].sub_dim;
  z_val         = targ_vecs[0].values;
  z_val_s       = targ_vecs[0].values_stride;

  /* */
  /* Scale the elements */
  /* */

  for( k = 0; k < z_sub_dim; ++k, z_val += z_val_s )
    *z_val *= alpha;

  return 0; /* success? */
}

/* Virtual function table */
const struct RTOp_RTOp_vtbl_t RTOp_TOp_scale_vector_vtbl =
{
  &RTOp_obj_value_vtbl /* use simple scalar value type for object instance data */
  ,&RTOp_obj_null_vtbl /* use null type for target object */
  ,"TOp_scalar_vector"
  ,NULL /* use default from reduct_vtbl */
  ,RTOp_TOp_scale_vector_apply_op
  ,NULL
  ,NULL
};

/* Class specific functions */

int RTOp_TOp_scale_vector_construct( RTOp_value_type alpha, struct RTOp_RTOp* op )
{
  op->vtbl = &RTOp_TOp_scale_vector_vtbl;
  op->vtbl->obj_data_vtbl->obj_create(NULL,NULL,&op->obj_data);
  *((RTOp_value_type*)op->obj_data) = alpha;
  return 0; /* success? */
}

int RTOp_TOp_scale_vector_destroy( struct RTOp_RTOp* op )
{
  op->vtbl->obj_data_vtbl->obj_free(NULL,NULL,&op->obj_data);
  op->vtbl = NULL;
  return 0; /* success? */
}

int RTOp_TOp_scale_vector_set_alpha( RTOp_value_type alpha, struct RTOp_RTOp* op )
{
  *((RTOp_value_type*)op->obj_data) = alpha;
  return 0; /* success? */
}