Actual source code: mpiadj.h
petsc-3.10.5 2019-03-28
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      4:  #include <petsc/private/matimpl.h>

      7: /*
      8:   MATMPIAdj format - Compressed row storage for storing adjacency lists, and possibly weights
      9:                      This is for grid reorderings (to reduce bandwidth)
     10:                      grid partitionings, etc. This is NOT currently a dynamic data-structure.

     12: */

     14: typedef struct {
     15:   PetscInt  nz;
     16:   PetscInt  *diag;                   /* pointers to diagonal elements, if they exist */
     17:   PetscInt  *i;                      /* pointer to beginning of each row */
     18:   PetscInt  *j;                      /* column values: j + i[k] is start of row k */
     19:   PetscInt  *values;                 /* numerical values */
     20:   PetscBool symmetric;               /* user indicates the nonzero structure is symmetric */
     21:   PetscBool freeaij;                 /* free a, i,j at destroy */
     22:   PetscBool freeaijwithfree;         /* use free() to free i,j instead of PetscFree() */
     23:   PetscScalar *rowvalues;            /* scalar work space for MatGetRow() */
     24:   PetscInt    rowvalues_alloc;
     25: } Mat_MPIAdj;

     27: #endif