PetscSortIntWithIntCountArrayPair#

Sorts an array of PetscInt in place in increasing order; changes a PetscInt array and a PetscCount array to match the sorted first array.

Synopsis#

#include "petscsys.h"  
PetscErrorCode PetscSortIntWithIntCountArrayPair(PetscCount n, PetscInt X[], PetscInt Y[], PetscCount Z[])

Not Collective

Input Parameters#

  • n - number of values

  • X - array of integers

  • Y - second array of integers (first array of the pair)

  • Z - third array of PetscCounts (second array of the pair)

Note#

Usually X, Y are matrix row/column indices, and Z is a permutation array and therefore Z’s type is PetscCount to allow 2B+ nonzeros even with 32-bit PetscInt.

See Also#

PetscSortReal(), PetscSortIntPermutation(), PetscSortIntWithArray(), PetscIntSortSemiOrdered(), PetscSortIntWithArrayPair()

Level#

intermediate

Location#

src/sys/utils/sorti.c

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