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https://github.com/HDFGroup/hdf5.git
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f859cb732b
* fixed missed closing of a dataset * fixed missed closing of a dataset * fixed typo in error return * Committing clang-format changes * minor edits * code format * Committing clang-format changes * code format * minor edit * switched from using MPI_count, to actual bytes written for H5FD_mpio_debug rw debugging * Committing clang-format changes * changed size_i in printf to reflect the I/O. * Committing clang-format changes * Fixed seg fault with xlf on BE with -qintsize=8 * fixed error function string * spelling corrections via codespell, added new spell check github actions * Committing clang-format changes * misc * misc * misc * misc * misc * misc * misc * misc * misc * misc * misc * misc * misc * misc * Committing clang-format changes * misc * misc * misc * misc * misc * misc * Committing clang-format changes * misc * work around for https://github.com/codespell-project/codespell/issues/2137 * misc * added missing file * misc * misc. * misc * switch to using Codespell with GitHub Actions * misc. * misc. * fixed more sp errors * Fix new typos found by codespell. * fixed proceed with precede * fixed variable in fortran test * fixed minnum * updated spelling list Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Larry Knox <lrknox@hdfgroup.org>
130 lines
4.8 KiB
Fortran
130 lines
4.8 KiB
Fortran
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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! Copyright by The HDF Group. *
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! Copyright by the Board of Trustees of the University of Illinois. *
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! All rights reserved. *
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! *
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! This file is part of HDF5. The full HDF5 copyright notice, including *
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! terms governing use, modification, and redistribution, is contained in *
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! the COPYING file, which can be found at the root of the source code *
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! distribution tree, or in https://www.hdfgroup.org/licenses. *
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! If you do not have access to either file, you may request a copy from *
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! help@hdfgroup.org. *
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! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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!
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! This example illustrates how to create a compressed dataset.
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! It is used in the HDF5 Tutorial.
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!
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PROGRAM h5_cmprss
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USE HDF5 ! This module contains all necessary modules
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IMPLICIT NONE
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!
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! The dataset is stored in file "h5_cmprss.h5"
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!
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CHARACTER(LEN=12), PARAMETER :: filename = "h5_cmprss.h5"
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INTEGER, PARAMETER :: rank = 2 ! Rank of the data set
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INTEGER, PARAMETER :: dim0 = 100 ! Data set sizes
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INTEGER, PARAMETER :: dim1 = 20
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INTEGER(hid_t) :: file_id, dataset_id, dataspace_id ! Identifiers
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INTEGER(hid_t) :: plist_id ! Property list identifier
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INTEGER :: error
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INTEGER(hsize_t), DIMENSION(1:rank) :: dims ! dimensions of data
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INTEGER(hsize_t), DIMENSION(1:rank) :: cdims ! sizes of chunked data
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INTEGER :: i,j, numfilt
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INTEGER, DIMENSION(1:dim0,1:dim1) :: buf ! write buffer
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INTEGER, DIMENSION(1:dim0,1:dim1) :: rbuf ! read buffer
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INTEGER(HSIZE_T), DIMENSION(1:rank) :: data_dims ! dimensions of data buffers
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INTEGER, DIMENSION(1:1) :: cd_values ! Auxiliary data for the filter
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INTEGER(size_t) :: nelmts ! Number of elements in cd_values
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INTEGER :: flags ! Bit vector specifying certain general properties of the filter
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INTEGER(SIZE_T) :: namelen = 180 ! Anticipated number of characters in name
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CHARACTER(LEN=180) :: name ! Name of the filter
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INTEGER :: filter_id ! Filter identification number
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! Uncomment these variables to use SZIP compression
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!INTEGER :: szip_options_mask
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!INTEGER :: szip_pixels_per_block
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!
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!Initialize FORTRAN predefined datatypes
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!
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CALL h5open_f(error)
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!
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! Create a file
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CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
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!
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! Create dataset "Compressed Data" in the group using absolute name.
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dims(1:2) = (/dim0, dim1/)
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CALL h5screate_simple_f(rank, dims, dataspace_id, error)
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CALL h5pcreate_f(H5P_DATASET_CREATE_F, plist_id, error)
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!
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! Dataset must be chunked for compression
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cdims(1:2) = 20
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CALL h5pset_chunk_f(plist_id, 2, cdims, error)
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! Set ZLIB / DEFLATE Compression using compression level 6.
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! To use SZIP Compression comment out these lines.
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CALL h5pset_deflate_f(plist_id, 6, error)
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! Uncomment these lines to set SZIP Compression
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!szip_options_mask = H5_SZIP_NN_OM_F
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!szip_pixels_per_block = 16
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!CALL H5Pset_szip_f(plist_id, szip_options_mask, szip_pixels_per_block, error)
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! Create data set
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CALL h5dcreate_f(file_id, "Compressed_Data", H5T_NATIVE_INTEGER, dataspace_id, &
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dataset_id, error, dcpl_id=plist_id)
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DO j = 1, dim1
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DO i = 1, dim0
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buf(i,j) = i+j
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ENDDO
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ENDDO
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data_dims(1:2) = (/dim0,dim1/)
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CALL h5dwrite_f(dataset_id, H5T_NATIVE_INTEGER, buf, data_dims, error)
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! Close resources
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CALL h5sclose_f(dataspace_id, error)
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CALL h5pclose_f(plist_id, error)
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CALL h5dclose_f(dataset_id, error)
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CALL h5fclose_f(file_id, error)
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! Now reopen the file and dataset in the file.
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CALL h5fopen_f(filename, H5F_ACC_RDONLY_F, file_id, error)
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CALL h5dopen_f(file_id, "Compressed_Data", dataset_id, error)
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! Retrieve filter information.
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CALL h5dget_create_plist_f(dataset_id, plist_id, error)
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CALL h5pget_nfilters_f(plist_id, numfilt, error)
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WRITE(*,'(A, I0)') "Number of filters associated with dataset: ", numfilt
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DO i = 1, numfilt
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nelmts = 1
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CALL h5pget_filter_f(plist_id, 0, flags, nelmts, cd_values, &
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namelen, name, filter_id, error)
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WRITE(*,'(30X,A)', ADVANCE='NO')"Filter Type: "
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IF(filter_id.EQ.H5Z_FILTER_DEFLATE_F)THEN
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WRITE(*,'(A)') "H5Z_FILTER_DEFLATE"
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ELSEIF (filter_id.EQ.H5Z_FILTER_SZIP_F)THEN
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WRITE(*,'(A)') "H5Z_FILTER_SZIP"
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ELSE
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WRITE(*,'(A)') "Other filter type included"
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ENDIF
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ENDDO
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data_dims(1:2) = (/dim0,dim1/)
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CALL h5dread_f(dataset_id, H5T_NATIVE_INTEGER, rbuf, data_dims, error)
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CALL h5dclose_f(dataset_id, error)
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CALL h5pclose_f(plist_id, error)
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CALL h5fclose_f(file_id, error)
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END PROGRAM h5_cmprss
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