diff options
| -rw-r--r-- | examples/h5_select.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/examples/h5_select.c b/examples/h5_select.c index 0137221..fa8ec0c 100644 --- a/examples/h5_select.c +++ b/examples/h5_select.c @@ -6,7 +6,7 @@ * Then four elements of the matrix are overwritten with the new values and * file is closed. Program reopens the file and selects the union of two * hyperslabs in the dataset in the file. Then it reads the selection into the - * memory dataset preserving the shape of the selectin. + * memory dataset preserving the shape of the selection. */ #include <hdf5.h> @@ -38,6 +38,8 @@ int main (void) hid_t file, dataset; /* File and dataset identifiers */ hid_t mid1, mid2, mid, fid; /* Dataspace identifiers */ + hid_t plist; /* Dataset property list identifier */ + hsize_t dim1[] = {MSPACE1_DIM}; /* Dimension size of the first dataset (in memory) */ hsize_t dim2[] = {MSPACE2_DIM}; /* Dimension size of the second dataset @@ -58,7 +60,8 @@ int main (void) from the file dataspace */ herr_t ret; unsigned i,j; - int matrix[FSPACE_DIM1][FSPACE_DIM2]; /* Buffer to write to the dataset */ + int fillvalue = 0; /* Fill value for the dataset */ + int matrix_out[MSPACE_DIM1][MSPACE_DIM2]; /* Buffer to read from the dataset */ int vector[MSPACE1_DIM]; @@ -70,15 +73,16 @@ int main (void) vector[0] = vector[MSPACE1_DIM - 1] = -1; for (i = 1; i < MSPACE1_DIM - 1; i++) vector[i] = i; - for (i = 0; i < FSPACE_DIM1; i++) { - for (j = 0; j < FSPACE_DIM2; j++) - matrix[i][j] = 0; - } + /* + * Create a file. + */ + file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT); - /* - * Create a file. - */ - file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT); + /* + * Create property list for a dataset and set up fill values. + */ + plist = H5Pcreate(H5P_DATASET_CREATE); + ret = H5Pset_fill_value(plist, H5T_NATIVE_INT, &fillvalue); /* * Create dataspace for the dataset in the file. @@ -86,10 +90,10 @@ int main (void) fid = H5Screate_simple(FSPACE_RANK, fdim, NULL); /* - * Create dataset and write it into the file. + * Create dataset in the file. Notice that creation + * property list plist is used. */ - dataset = H5Dcreate(file, "Matrix in file", H5T_NATIVE_INT, fid, H5P_DEFAULT); - ret = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, matrix); + dataset = H5Dcreate(file, "Matrix in file", H5T_NATIVE_INT, fid, plist); /* * Select hyperslab for the dataset in the file, using 3x2 blocks, |