Actual source code: isltog.h

petsc-3.11.2 2019-05-18
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  2: /*
  3:      This is a terrible way of doing "templates" in C.
  4: */
  5: #define PETSCMAP1_a(a,b)  a ## b
  6: #define PETSCMAP1_b(a,b)  PETSCMAP1_a(a,b)
  7: #define PETSCMAPNAME(a)   PETSCMAP1_b(a,GTOLNAME)
  8: #define PETSCMAPTYPE(a)   PETSCMAP1_b(a,GTOLTYPE)

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

 19:   if (!map) {
 20:     ISGlobalToLocalMappingSetUp(mapping);
 21:     map  = (PETSCMAPTYPE(ISLocalToGlobalMapping) *)mapping->data;
 22:   }
 23:   start   = mapping->globalstart;
 24:   end     = mapping->globalend;
 25:   bs      = GTOLBS;



 29:   if (type == IS_GTOLM_MASK) {
 30:     if (idxout) {
 31:       for (i=0; i<n; i++) {
 32:         if (idx[i] < 0)                   idxout[i] = idx[i];
 33:         else if (idx[i] < bs*start)       idxout[i] = -1;
 34:         else if (idx[i] > bs*(end+1)-1)   idxout[i] = -1;
 35:         else                              GTOL(idx[i], idxout[i]);
 36:       }
 37:     }
 38:     if (nout) *nout = n;
 39:   } else {
 40:     if (idxout) {
 41:       for (i=0; i<n; i++) {
 42:         if (idx[i] < 0) continue;
 43:         if (idx[i] < bs*start) continue;
 44:         if (idx[i] > bs*(end+1)-1) continue;
 45:         GTOL(idx[i], tmp);
 46:         if (tmp < 0) continue;
 47:         idxout[nf++] = tmp;
 48:       }
 49:     } else {
 50:       for (i=0; i<n; i++) {
 51:         if (idx[i] < 0) continue;
 52:         if (idx[i] < bs*start) continue;
 53:         if (idx[i] > bs*(end+1)-1) continue;
 54:         GTOL(idx[i], tmp);
 55:         if (tmp < 0) continue;
 56:         nf++;
 57:       }
 58:     }
 59:     if (nout) *nout = nf;
 60:   }
 61:   return(0);
 62: }

 64: #undef PETSCMAP1_a
 65: #undef PETSCMAP1_b
 66: #undef PETSCMAPTYPE
 67: #undef PETSCMAPNAME
 68: #undef GTOLTYPE
 69: #undef GTOLNAME
 70: #undef GTOLBS
 71: #undef GTOL