2: /*
  3:      This is a terrible way of doing "templates" in C.
  4: */
  5: #define PETSCMAPNAME(a) PetscConcat(a,GTOLNAME)
  6: #define PETSCMAPTYPE(a) PetscConcat(a,GTOLTYPE)

  8: static PetscErrorCode PETSCMAPNAME(ISGlobalToLocalMappingApply)(ISLocalToGlobalMapping mapping,ISGlobalToLocalMappingMode type,
  9:                                                       PetscInt n,const PetscInt idx[],PetscInt *nout,PetscInt idxout[])
 10: {
 11:   PetscInt                             i,nf = 0,tmp,start,end,bs;
 12:   PETSCMAPTYPE(ISLocalToGlobalMapping) *map = (PETSCMAPTYPE(ISLocalToGlobalMapping)*)mapping->data;

 15:   if (!map) {
 16:     ISGlobalToLocalMappingSetUp(mapping);
 17:     map  = (PETSCMAPTYPE(ISLocalToGlobalMapping) *)mapping->data;
 18:   }
 19:   start = mapping->globalstart;
 20:   end   = mapping->globalend;
 21:   bs    = GTOLBS;

 23:   if (type == IS_GTOLM_MASK) {
 24:     if (idxout) {
 25:       for (i=0; i<n; i++) {
 26:         if (idx[i] < 0)                 idxout[i] = idx[i];
 27:         else if (idx[i] < bs*start)     idxout[i] = -1;
 28:         else if (idx[i] > bs*(end+1)-1) idxout[i] = -1;
 29:         else                            GTOL(idx[i], idxout[i]);
 30:       }
 31:     }
 32:     if (nout) *nout = n;
 33:   } else {
 34:     if (idxout) {
 35:       for (i=0; i<n; i++) {
 36:         if (idx[i] < 0) continue;
 37:         if (idx[i] < bs*start) continue;
 38:         if (idx[i] > bs*(end+1)-1) continue;
 39:         GTOL(idx[i], tmp);
 40:         if (tmp < 0) continue;
 41:         idxout[nf++] = tmp;
 42:       }
 43:     } else {
 44:       for (i=0; i<n; i++) {
 45:         if (idx[i] < 0) continue;
 46:         if (idx[i] < bs*start) continue;
 47:         if (idx[i] > bs*(end+1)-1) continue;
 48:         GTOL(idx[i], tmp);
 49:         if (tmp < 0) continue;
 50:         nf++;
 51:       }
 52:     }
 53:     if (nout) *nout = nf;
 54:   }
 55:   return 0;
 56: }

 58: #undef PETSCMAPTYPE
 59: #undef PETSCMAPNAME
 60: #undef GTOLTYPE
 61: #undef GTOLNAME
 62: #undef GTOLBS
 63: #undef GTOL