Actual source code: ex190.c
petsc-3.8.4 2018-03-24
1: static char help[] = "Tests MatLoad() with uneven dimensions set in program\n\n";
3: #include <petscmat.h>
5: int main(int argc,char **args)
6: {
7: Mat A;
8: PetscViewer fd;
9: char file[PETSC_MAX_PATH_LEN];
11: PetscBool flg;
12: PetscMPIInt rank;
14: PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
15: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
17: /* Determine files from which we read the matrix */
18: PetscOptionsGetString(NULL,NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);
19: if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f");
21: /* Load matrices */
22: PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);
23: MatCreate(PETSC_COMM_WORLD,&A);
24: MatSetFromOptions(A);
25: MatSetBlockSize(A,2);
26: if (!rank) {
27: MatSetSizes(A, 4, PETSC_DETERMINE, PETSC_DETERMINE,PETSC_DETERMINE);
28: } else {
29: MatSetSizes(A, 8, PETSC_DETERMINE, PETSC_DETERMINE,PETSC_DETERMINE);
30: }
31: MatLoad(A,fd);
32: PetscViewerDestroy(&fd);
33: MatDestroy(&A);
34: PetscFinalize();
35: return ierr;
36: }