Actual source code: ex26.c
2: static char help[] = "Tests MatGetRowIJ for SeqAIJ, SeqBAIJ and SeqSBAIJ\n\n";
4: #include <petscmat.h>
6: PetscErrorCode DumpCSR(Mat A, PetscInt shift, PetscBool symmetric, PetscBool compressed)
7: {
8: MatType type;
9: PetscInt i, j, nr, bs = 1;
10: const PetscInt *ia, *ja;
11: PetscBool done, isseqbaij, isseqsbaij;
13: PetscFunctionBeginUser;
14: PetscCall(PetscObjectBaseTypeCompare((PetscObject)A, MATSEQBAIJ, &isseqbaij));
15: PetscCall(PetscObjectBaseTypeCompare((PetscObject)A, MATSEQSBAIJ, &isseqsbaij));
16: if (isseqbaij || isseqsbaij) PetscCall(MatGetBlockSize(A, &bs));
17: PetscCall(MatGetType(A, &type));
18: PetscCall(MatGetRowIJ(A, shift, symmetric, compressed, &nr, &ia, &ja, &done));
19: PetscCall(PetscPrintf(PETSC_COMM_SELF, "===========================================================\n"));
20: PetscCall(PetscPrintf(PETSC_COMM_SELF, "CSR for %s: shift %" PetscInt_FMT " symmetric %" PetscInt_FMT " compressed %" PetscInt_FMT "\n", type, shift, (PetscInt)symmetric, (PetscInt)compressed));
21: for (i = 0; i < nr; i++) {
22: PetscCall(PetscPrintf(PETSC_COMM_SELF, "%" PetscInt_FMT ":", i + shift));
23: for (j = ia[i]; j < ia[i + 1]; j++) PetscCall(PetscPrintf(PETSC_COMM_SELF, " %" PetscInt_FMT, ja[j - shift]));
24: PetscCall(PetscPrintf(PETSC_COMM_SELF, "\n"));
25: }
26: PetscCall(MatRestoreRowIJ(A, shift, symmetric, compressed, &nr, &ia, &ja, &done));
27: PetscFunctionReturn(PETSC_SUCCESS);
28: }
30: int main(int argc, char **args)
31: {
32: Mat A, B, C;
33: PetscInt i, j, k, m = 3, n = 3, bs = 1;
34: PetscMPIInt size;
36: PetscFunctionBeginUser;
37: PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
38: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
39: PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!");
40: PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL));
41: PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL));
42: PetscCall(PetscOptionsGetInt(NULL, NULL, "-bs", &bs, NULL));
43: /* adjust sizes by block size */
44: if (m % bs) m += bs - m % bs;
45: if (n % bs) n += bs - n % bs;
47: PetscCall(MatCreate(PETSC_COMM_SELF, &A));
48: PetscCall(MatSetSizes(A, m * n, m * n, PETSC_DECIDE, PETSC_DECIDE));
49: PetscCall(MatSetBlockSize(A, bs));
50: PetscCall(MatSetType(A, MATSEQAIJ));
51: PetscCall(MatSetUp(A));
52: PetscCall(MatCreate(PETSC_COMM_SELF, &B));
53: PetscCall(MatSetSizes(B, m * n, m * n, PETSC_DECIDE, PETSC_DECIDE));
54: PetscCall(MatSetBlockSize(B, bs));
55: PetscCall(MatSetType(B, MATSEQBAIJ));
56: PetscCall(MatSetUp(B));
57: PetscCall(MatCreate(PETSC_COMM_SELF, &C));
58: PetscCall(MatSetSizes(C, m * n, m * n, PETSC_DECIDE, PETSC_DECIDE));
59: PetscCall(MatSetBlockSize(C, bs));
60: PetscCall(MatSetType(C, MATSEQSBAIJ));
61: PetscCall(MatSetUp(C));
62: PetscCall(MatSetOption(C, MAT_IGNORE_LOWER_TRIANGULAR, PETSC_TRUE));
64: for (i = 0; i < m; i++) {
65: for (j = 0; j < n; j++) {
66: PetscScalar v = -1.0;
67: PetscInt Ii = j + n * i, J;
68: J = Ii - n;
69: if (J >= 0) {
70: PetscCall(MatSetValues(A, 1, &Ii, 1, &J, &v, INSERT_VALUES));
71: PetscCall(MatSetValues(B, 1, &Ii, 1, &J, &v, INSERT_VALUES));
72: PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));
73: }
74: J = Ii + n;
75: if (J < m * n) {
76: PetscCall(MatSetValues(A, 1, &Ii, 1, &J, &v, INSERT_VALUES));
77: PetscCall(MatSetValues(B, 1, &Ii, 1, &J, &v, INSERT_VALUES));
78: PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));
79: }
80: J = Ii - 1;
81: if (J >= 0) {
82: PetscCall(MatSetValues(A, 1, &Ii, 1, &J, &v, INSERT_VALUES));
83: PetscCall(MatSetValues(B, 1, &Ii, 1, &J, &v, INSERT_VALUES));
84: PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));
85: }
86: J = Ii + 1;
87: if (J < m * n) {
88: PetscCall(MatSetValues(A, 1, &Ii, 1, &J, &v, INSERT_VALUES));
89: PetscCall(MatSetValues(B, 1, &Ii, 1, &J, &v, INSERT_VALUES));
90: PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));
91: }
92: v = 4.0;
93: PetscCall(MatSetValues(A, 1, &Ii, 1, &Ii, &v, INSERT_VALUES));
94: PetscCall(MatSetValues(B, 1, &Ii, 1, &Ii, &v, INSERT_VALUES));
95: PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES));
96: }
97: }
98: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
99: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
100: PetscCall(MatAssemblyBegin(B, MAT_FINAL_ASSEMBLY));
101: PetscCall(MatAssemblyEnd(B, MAT_FINAL_ASSEMBLY));
102: PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));
103: PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));
105: /* test MatGetRowIJ for the three Mat types */
106: PetscCall(MatView(A, NULL));
107: PetscCall(MatView(B, NULL));
108: PetscCall(MatView(C, NULL));
109: for (i = 0; i < 2; i++) {
110: PetscInt shift = i;
111: for (j = 0; j < 2; j++) {
112: PetscBool symmetric = ((j > 0) ? PETSC_FALSE : PETSC_TRUE);
113: for (k = 0; k < 2; k++) {
114: PetscBool compressed = ((k > 0) ? PETSC_FALSE : PETSC_TRUE);
115: PetscCall(DumpCSR(A, shift, symmetric, compressed));
116: PetscCall(DumpCSR(B, shift, symmetric, compressed));
117: PetscCall(DumpCSR(C, shift, symmetric, compressed));
118: }
119: }
120: }
121: PetscCall(MatDestroy(&A));
122: PetscCall(MatDestroy(&B));
123: PetscCall(MatDestroy(&C));
124: PetscCall(PetscFinalize());
125: return 0;
126: }
128: /*TEST
130: test:
132: test:
133: suffix: 2
134: args: -bs 2
136: TEST*/