1: #pragma once

  3: #include <petscdmlabel.h>
  4: #include <petscbt.h>
  5: #include <petscistypes.h>
  6: #include <petsc/private/hashmapi.h>
  7: #include <petsc/private/hashseti.h>

  9: typedef struct _p_DMLabelOps *DMLabelOps;
 10: struct _p_DMLabelOps {
 11:   PetscErrorCode (*view)(DMLabel, PetscViewer);
 12:   PetscErrorCode (*setup)(DMLabel);
 13:   PetscErrorCode (*destroy)(DMLabel);
 14:   PetscErrorCode (*duplicate)(DMLabel, DMLabel *);
 15:   PetscErrorCode (*getstratumis)(DMLabel, PetscInt, IS *);
 16: };

 18: /* This is an integer map, in addition it is also a container class
 19:    Design points:
 20:      - Low storage is the most important design point
 21:      - We want flexible insertion and deletion
 22:      - We can live with O(log) query, but we need O(1) iteration over strata
 23: */
 24: struct _p_DMLabel {
 25:   PETSCHEADER(struct _p_DMLabelOps);
 26:   PetscBool readonly;      /* Flag for labels which cannot be modified after creation */
 27:   PetscInt  numStrata;     /* Number of integer values */
 28:   PetscInt  defaultValue;  /* Background value when no value explicitly given */
 29:   PetscInt *stratumValues; /* Value of each stratum */
 30:   /* Basic IS storage */
 31:   PetscBool *validIS;      /* The IS is valid (no additions need to be merged in) */
 32:   PetscInt  *stratumSizes; /* Size of each stratum */
 33:   IS        *points;       /* Points for each stratum, always sorted */
 34:   /* Hash tables for fast search and insertion */
 35:   PetscHMapI  hmap; /* Hash map for fast strata search */
 36:   PetscHSetI *ht;   /* Hash set for fast insertion */
 37:   /* Index for fast search */
 38:   PetscInt pStart, pEnd; /* Bounds for index lookup */
 39:   PetscBT  bt;           /* A bit-wise index */
 40:   /* Propagation */
 41:   PetscInt *propArray; /* Array of values for propagation */
 42: };

 44: PETSC_INTERN PetscErrorCode DMLabelLookupStratum(DMLabel, PetscInt, PetscInt *);
 45: PETSC_INTERN PetscErrorCode DMLabelGetStratumSize_Private(DMLabel, PetscInt, PetscInt *);
 46: PETSC_INTERN PetscErrorCode PetscSectionSymCreate_Label(PetscSectionSym);
 47: PETSC_INTERN PetscErrorCode DMLabelMakeAllInvalid_Internal(DMLabel);