RTOpPack: Extra C/C++ Code for Vector Reduction/Transformation Operators Version of the Day
RTOp_ROp_fraction_to_zero_boundary.c
00001 /*
00002 // @HEADER
00003 // ***********************************************************************
00004 // 
00005 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00006 //                  Copyright (2003) Sandia Corporation
00007 // 
00008 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00009 // license for use of this work by or on behalf of the U.S. Government.
00010 // 
00011 // This library is free software; you can redistribute it and/or modify
00012 // it under the terms of the GNU Lesser General Public License as
00013 // published by the Free Software Foundation; either version 2.1 of the
00014 // License, or (at your option) any later version.
00015 //  
00016 // This library is distributed in the hope that it will be useful, but
00017 // WITHOUT ANY WARRANTY; without even the implied warranty of
00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00019 // Lesser General Public License for more details.
00020 //  
00021 // You should have received a copy of the GNU Lesser General Public
00022 // License along with this library; if not, write to the Free Software
00023 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00024 // USA
00025 // Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
00026 // 
00027 // ***********************************************************************
00028 // @HEADER
00029 */
00030 
00031 /* ///////////////////////////////////////////// */
00032 /* RTOp_ROp_fraction_to_zero_boundary.c */
00033 
00034 /* */
00035 /* Note: This file was created automatically by 'new_rtop.pl' */
00036 /*       on 7/8/2002 at 19:19 */
00037 /* */
00038 
00039 #define max(a,b) ( (a) > (b) ? (a) : (b) )
00040 #define min(a,b) ( (a) < (b) ? (a) : (b) )
00041 
00042 
00043 #include "RTOp_ROp_fraction_to_zero_boundary.h"
00044 #include "RTOp_obj_value_vtbl.h"  /* vtbl for operator object instance data */
00045 #include "RTOp_reduct_min_value.h"  /* Reduction of intermediate reduction objects */
00046 
00047 
00048 
00049 /* Implementation functions for RTOp_RTOp */
00050 
00051 static int RTOp_ROp_fraction_to_zero_boundary_apply_op(
00052   const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
00053   , const int num_vecs, const struct RTOp_SubVector vecs[]
00054   , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
00055   , RTOp_ReductTarget reduct_obj )
00056 {
00057   /* */
00058   /* Declare local variables */
00059   /* */
00060 
00061   /* Access to the operator object instance data */
00062   RTOp_value_type *tau = (RTOp_value_type*)obj_data;
00063   /* Access to the reduction object data */
00064   RTOp_value_type *alpha_max = (RTOp_value_type*)reduct_obj;
00065   /* Vector data */
00066   RTOp_index_type           sub_dim;
00067   /* v0 */
00068   const RTOp_value_type     *v0_val;
00069   ptrdiff_t                 v0_val_s;
00070   /* v1 */
00071   const RTOp_value_type     *v1_val;
00072   ptrdiff_t                 v1_val_s;
00073 
00074   /* Automatic temporary variables */
00075   register RTOp_index_type  k;
00076   /* Temporary element-wise reduction object */
00077   RTOp_value_type alpha_max_ith;
00078 
00079   /* */
00080   /* Validate the input */
00081   /* */
00082   if( num_vecs != 2 || ( num_vecs && vecs == NULL ) )
00083     return RTOp_ERR_INVALID_NUM_VECS;
00084   if( num_targ_vecs != 0 || ( num_targ_vecs && targ_vecs == NULL ) )
00085     return RTOp_ERR_INVALID_NUM_TARG_VECS;
00086   if( /* Validate sub_dim */
00087     vecs[1].sub_dim != vecs[0].sub_dim
00088     )
00089     return RTOp_ERR_INCOMPATIBLE_VECS;
00090   assert(obj_data);
00091   assert(reduct_obj);
00092 
00093   /* */
00094   /* Get pointers to data */
00095   /* */
00096   sub_dim       = vecs[0].sub_dim;
00097   /* v0 */
00098   v0_val        = vecs[0].values;
00099   v0_val_s      = vecs[0].values_stride;
00100   /* v1 */
00101   v1_val        = vecs[1].values;
00102   v1_val_s      = vecs[1].values_stride;
00103 
00104   /* */
00105   /* Apply the operator: */
00106   /* */
00107   for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s, v1_val += v1_val_s )
00108   {
00109     /* Element-wise reduction */
00110     alpha_max_ith = ((*v1_val) >= 0) ? 1.0 : (*tau)*(*v0_val)/(-(*v1_val));
00111     /* Reduction of intermediates */
00112     (*alpha_max) = min( (*alpha_max), alpha_max_ith );
00113   }
00114 
00115   return 0; /* success? */
00116 }
00117 
00118 static int RTOp_ROp_fraction_to_zero_boundary_reduct_obj_reinit(
00119   const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
00120   ,RTOp_ReductTarget reduct_obj
00121   )
00122 {
00123   RTOp_value_type *alpha_max = (RTOp_value_type*)reduct_obj;
00124   *alpha_max = 1.0;
00125   return 0;
00126 }
00127 
00128 /* Virtual function table */
00129 const struct RTOp_RTOp_vtbl_t RTOp_ROp_fraction_to_zero_boundary_vtbl =
00130 {
00131   &RTOp_obj_value_vtbl
00132   ,&RTOp_obj_value_vtbl
00133   ,"ROp_fraction_to_zero_boundary"
00134   ,RTOp_ROp_fraction_to_zero_boundary_reduct_obj_reinit
00135   ,RTOp_ROp_fraction_to_zero_boundary_apply_op
00136   ,RTOp_reduct_min_value
00137   ,RTOp_get_reduct_min_value_op
00138 };
00139 
00140 /* Class specific functions */
00141 
00142 int RTOp_ROp_fraction_to_zero_boundary_construct( RTOp_value_type tau,  struct RTOp_RTOp* op )
00143 {
00144 #ifdef RTOp_DEBUG
00145   assert(op);
00146 #endif
00147   op->obj_data  = NULL;
00148   op->vtbl      = &RTOp_ROp_fraction_to_zero_boundary_vtbl;
00149   op->vtbl->obj_data_vtbl->obj_create(NULL,NULL,&op->obj_data);
00150   return RTOp_ROp_fraction_to_zero_boundary_init(tau,op);
00151 }
00152 
00153 int RTOp_ROp_fraction_to_zero_boundary_destroy( struct RTOp_RTOp* op )
00154 {
00155   op->vtbl->obj_data_vtbl->obj_free(NULL,NULL,&op->obj_data);
00156   op->obj_data  = NULL;
00157   op->vtbl      = NULL;
00158   return 0;
00159 }
00160 
00161 int RTOp_ROp_fraction_to_zero_boundary_init( RTOp_value_type tau, struct RTOp_RTOp* op )
00162 {
00163   RTOp_value_type *ptr_tau = (RTOp_value_type*)op->obj_data;
00164   *ptr_tau = tau;
00165   return 0;
00166 }
00167 RTOp_value_type RTOp_ROp_fraction_to_zero_boundary_val(RTOp_ReductTarget reduct_obj)
00168 {
00169   return *((RTOp_value_type*)reduct_obj);
00170 }
00171 
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