Actual source code: dmlabelimpl.h
petsc-3.12.4 2020-02-04
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      1: #if !defined(_LABELIMPL_H)
      2: #define _LABELIMPL_H

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

     10: /* This is an integer map, in addition it is also a container class
     11:    Design points:
     12:      - Low storage is the most important design point
     13:      - We want flexible insertion and deletion
     14:      - We can live with O(log) query, but we need O(1) iteration over strata
     15: */
     16: struct _p_DMLabel {
     17:   PETSCHEADER(int);
     18:   PetscInt    numStrata;      /* Number of integer values */
     19:   PetscInt    defaultValue;   /* Background value when no value explicitly given */
     20:   PetscInt   *stratumValues;  /* Value of each stratum */
     21:   /* Basic IS storage */
     22:   PetscBool  *validIS;        /* The IS is valid (no additions need to be merged in) */
     23:   PetscInt   *stratumSizes;   /* Size of each stratum */
     24:   IS         *points;         /* Points for each stratum, always sorted */
     25:   /* Hash tables for fast search and insertion */
     26:   PetscHMapI  hmap;           /* Hash map for fast strata search */
     27:   PetscHSetI *ht;             /* Hash set for fast insertion */
     28:   /* Index for fast search */
     29:   PetscInt    pStart, pEnd;   /* Bounds for index lookup */
     30:   PetscBT     bt;             /* A bit-wise index */
     31: };

     33: PETSC_INTERN PetscErrorCode PetscSectionSymCreate_Label(PetscSectionSym);
     34: #endif