RTOp_TOp_sign.c

/*
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// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) Sandia Corporation
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/* ///////////////////////////////////////////// */
/* RTOp_TOp_sign.c */

#include "RTOp_TOp_sign.h"
#include "RTOp_obj_null_vtbl.h"  /* vtbl for operator object instance data */

/* Implementation functions for RTOp_RTOp */

static int RTOp_TOp_sign_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 reduct_obj )
{
  /* */
  /* Declare local variables */
  /* */

  /* Vector data */
  RTOp_index_type           sub_dim;
  /* z0 */
  RTOp_value_type           *z0_val;
  ptrdiff_t                 z0_val_s;
  /* v0 */
  const RTOp_value_type     *v0_val;
  ptrdiff_t                 v0_val_s;

  /* Automatic temporary variables */
  register RTOp_index_type  k;

  /* */
  /* Validate the input */
  /* */
  if( num_vecs != 1 || ( num_vecs && vecs == NULL ) )
    return RTOp_ERR_INVALID_NUM_VECS;
  if( num_targ_vecs != 1 || ( num_targ_vecs && targ_vecs == NULL ) )
    return RTOp_ERR_INVALID_NUM_TARG_VECS;
  if( /* Validate sub_dim */
    targ_vecs[0].sub_dim != vecs[0].sub_dim
    )
    return RTOp_ERR_INCOMPATIBLE_VECS;


  /* */
  /* Get pointers to data */
  /* */
  sub_dim       = vecs[0].sub_dim;
  /* z0 */
  z0_val        = targ_vecs[0].values;
  z0_val_s      = targ_vecs[0].values_stride;
  /* v0 */
  v0_val        = vecs[0].values;
  v0_val_s      = vecs[0].values_stride;


  /* */
  /* Apply the operator: */
  /* */
  for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s, z0_val += z0_val_s )
  {
    /* Element-wise transformation */
    (*z0_val) = ( (*v0_val) == 0.0 ? 0.0 : ( (*v0_val) < 0.0 ? -1.0 : +1.0 ) );
  }

  return 0; /* success? */
}

/* Virtual function table */
const struct RTOp_RTOp_vtbl_t RTOp_TOp_sign_vtbl =
{
  &RTOp_obj_null_vtbl
  ,&RTOp_obj_null_vtbl
  ,"TOp_sign"
  ,NULL
  ,RTOp_TOp_sign_apply_op
  ,NULL
  ,NULL
};

/* Class specific functions */

int RTOp_TOp_sign_construct(  struct RTOp_RTOp* op )
{
#ifdef RTOp_DEBUG
  assert(op);
#endif
  op->obj_data  = NULL;
  op->vtbl      = &RTOp_TOp_sign_vtbl;
  op->vtbl->obj_data_vtbl->obj_create(NULL,NULL,&op->obj_data);
  return 0;
}

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