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RTOp_TOp_sign.c
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00001 /*
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00004 // 
00005 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00006 //                  Copyright (2003) Sandia Corporation
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00042 */
00043 
00044 /* ///////////////////////////////////////////// */
00045 /* RTOp_TOp_sign.c */
00046 
00047 #include "RTOp_TOp_sign.h"
00048 #include "RTOp_obj_null_vtbl.h"  /* vtbl for operator object instance data */
00049 
00050 /* Implementation functions for RTOp_RTOp */
00051 
00052 static int RTOp_TOp_sign_apply_op(
00053   const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
00054   , const int num_vecs, const struct RTOp_SubVector vecs[]
00055   , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
00056   , RTOp_ReductTarget reduct_obj )
00057 {
00058   /* */
00059   /* Declare local variables */
00060   /* */
00061 
00062   /* Vector data */
00063   RTOp_index_type           sub_dim;
00064   /* z0 */
00065   RTOp_value_type           *z0_val;
00066   ptrdiff_t                 z0_val_s;
00067   /* v0 */
00068   const RTOp_value_type     *v0_val;
00069   ptrdiff_t                 v0_val_s;
00070 
00071   /* Automatic temporary variables */
00072   register RTOp_index_type  k;
00073 
00074   /* */
00075   /* Validate the input */
00076   /* */
00077   if( num_vecs != 1 || ( num_vecs && vecs == NULL ) )
00078     return RTOp_ERR_INVALID_NUM_VECS;
00079   if( num_targ_vecs != 1 || ( num_targ_vecs && targ_vecs == NULL ) )
00080     return RTOp_ERR_INVALID_NUM_TARG_VECS;
00081   if( /* Validate sub_dim */
00082     targ_vecs[0].sub_dim != vecs[0].sub_dim
00083     )
00084     return RTOp_ERR_INCOMPATIBLE_VECS;
00085 
00086 
00087   /* */
00088   /* Get pointers to data */
00089   /* */
00090   sub_dim       = vecs[0].sub_dim;
00091   /* z0 */
00092   z0_val        = targ_vecs[0].values;
00093   z0_val_s      = targ_vecs[0].values_stride;
00094   /* v0 */
00095   v0_val        = vecs[0].values;
00096   v0_val_s      = vecs[0].values_stride;
00097 
00098 
00099   /* */
00100   /* Apply the operator: */
00101   /* */
00102   for( k = 0; k < sub_dim; ++k, v0_val += v0_val_s, z0_val += z0_val_s )
00103   {
00104     /* Element-wise transformation */
00105     (*z0_val) = ( (*v0_val) == 0.0 ? 0.0 : ( (*v0_val) < 0.0 ? -1.0 : +1.0 ) );
00106   }
00107 
00108   return 0; /* success? */
00109 }
00110 
00111 /* Virtual function table */
00112 const struct RTOp_RTOp_vtbl_t RTOp_TOp_sign_vtbl =
00113 {
00114   &RTOp_obj_null_vtbl
00115   ,&RTOp_obj_null_vtbl
00116   ,"TOp_sign"
00117   ,NULL
00118   ,RTOp_TOp_sign_apply_op
00119   ,NULL
00120   ,NULL
00121 };
00122 
00123 /* Class specific functions */
00124 
00125 int RTOp_TOp_sign_construct(  struct RTOp_RTOp* op )
00126 {
00127 #ifdef RTOp_DEBUG
00128   assert(op);
00129 #endif
00130   op->obj_data  = NULL;
00131   op->vtbl      = &RTOp_TOp_sign_vtbl;
00132   op->vtbl->obj_data_vtbl->obj_create(NULL,NULL,&op->obj_data);
00133   return 0;
00134 }
00135 
00136 int RTOp_TOp_sign_destroy( struct RTOp_RTOp* op )
00137 {
00138   op->vtbl->obj_data_vtbl->obj_free(NULL,NULL,&op->obj_data);
00139   op->obj_data  = NULL;
00140   op->vtbl      = NULL;
00141   return 0;
00142 }
00143 
00144 
00145 
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