Date: 2026-07-30T21:14:20+00:00

Actual source code: matio.c

      1: #include <petscviewer.h>
      2: #include <petsc/private/matimpl.h>

      4: PetscErrorCode MatView_Binary_BlockSizes(Mat mat, PetscViewer viewer)
      5: {
      6:   FILE       *info;
      7:   PetscMPIInt rank;
      8:   PetscInt    rbs, cbs;
      9:   PetscBool   skip;

     11:   PetscFunctionBegin;
     12:   PetscCall(PetscViewerBinaryGetSkipInfo(viewer, &skip));
     13:   if (skip) PetscFunctionReturn(PETSC_SUCCESS);
     14:   PetscCall(MatGetBlockSizes(mat, &rbs, &cbs));
     15:   PetscCall(PetscViewerBinaryGetInfoPointer(viewer, &info));
     16:   PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)viewer), &rank));
     17:   if (rank == 0 && info) {
     18:     if (rbs != cbs) PetscCall(PetscFPrintf(PETSC_COMM_SELF, info, "-matload_block_size %" PetscInt_FMT ",%" PetscInt_FMT "\n", rbs, cbs));
     19:     else PetscCall(PetscFPrintf(PETSC_COMM_SELF, info, "-matload_block_size %" PetscInt_FMT "\n", rbs));
     20:   }
     21:   PetscFunctionReturn(PETSC_SUCCESS);
     22: }

     24: PetscErrorCode MatLoad_Binary_BlockSizes(Mat mat, PetscViewer viewer)
     25: {
     26:   PetscInt  rbs, cbs, bs[2], n = 2;
     27:   PetscBool set;

     29:   PetscFunctionBegin;
     30:   /* get current block sizes */
     31:   PetscCall(MatGetBlockSizes(mat, &rbs, &cbs));
     32:   bs[0] = rbs;
     33:   bs[1] = cbs;
     34:   /* get block sizes from the options database */
     35:   PetscOptionsBegin(PetscObjectComm((PetscObject)viewer), NULL, "Options for loading matrix block size", "Mat");
     36:   PetscCall(PetscOptionsIntArray("-matload_block_size", "Set the block size used to store the matrix", "MatLoad", bs, &n, &set));
     37:   PetscOptionsEnd();
     38:   if (!set) PetscFunctionReturn(PETSC_SUCCESS);
     39:   if (n == 1) bs[1] = bs[0]; /* to support -matload_block_size <bs> */
     40:   /* set matrix block sizes */
     41:   if (bs[0] > 0) rbs = bs[0];
     42:   if (bs[1] > 0) cbs = bs[1];
     43:   PetscCall(MatSetBlockSizes(mat, rbs, cbs));
     44:   PetscFunctionReturn(PETSC_SUCCESS);
     45: }