diff options
Diffstat (limited to 'hl/src/H5DO.c')
-rw-r--r-- | hl/src/H5DO.c | 89 |
1 files changed, 78 insertions, 11 deletions
diff --git a/hl/src/H5DO.c b/hl/src/H5DO.c index 99dbd93..f17e5d5 100644 --- a/hl/src/H5DO.c +++ b/hl/src/H5DO.c @@ -5,12 +5,10 @@ * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * -* the files COPYING and Copyright.html. COPYING can be found at the root * -* of the source code distribution tree; Copyright.html can be found at the * -* root level of an installed copy of the electronic HDF5 document set and * -* is linked from the top-level documents page. It can also be found at * -* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have * -* access to either file, you may request a copy from help@hdfgroup.org. * + * the COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #include <string.h> @@ -29,7 +27,7 @@ /*------------------------------------------------------------------------- * Function: H5DOwrite_chunk * - * Purpose: Writes an entire chunk to the file directly. + * Purpose: Writes an entire chunk to the file directly. * * Return: Non-negative on success/Negative on failure * @@ -39,14 +37,14 @@ *------------------------------------------------------------------------- */ herr_t -H5DOwrite_chunk(hid_t dset_id, hid_t dxpl_id, uint32_t filters, const hsize_t *offset, +H5DOwrite_chunk(hid_t dset_id, hid_t dxpl_id, uint32_t filters, const hsize_t *offset, size_t data_size, const void *buf) { hbool_t created_dxpl = FALSE; /* Whether we created a DXPL */ hbool_t do_direct_write = TRUE; /* Flag for direct writes */ uint32_t data_size_32; /* Chunk data size (limited to 32-bits currently) */ herr_t ret_value = FAIL; /* Return value */ - + /* Check arguments */ if(dset_id < 0) goto done; @@ -62,7 +60,7 @@ H5DOwrite_chunk(hid_t dset_id, hid_t dxpl_id, uint32_t filters, const hsize_t *o /* If the user passed in a default DXPL, create one to pass to H5Dwrite() */ if(H5P_DEFAULT == dxpl_id) { - if((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0) + if((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0) goto done; created_dxpl = TRUE; } /* end if */ @@ -89,11 +87,80 @@ done: if(H5Pclose(dxpl_id) < 0) ret_value = FAIL; } /* end if */ - else + else { /* Reset the direct write flag on user DXPL */ + do_direct_write = FALSE; if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, &do_direct_write) < 0) ret_value = FAIL; + } return(ret_value); } /* end H5DOwrite_chunk() */ +/*------------------------------------------------------------------------- + * Function: H5DOread_chunk + * + * Purpose: Reads an entire chunk from the file directly. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Matthew Strong (GE Healthcare) + * 14 February 2016 + * + *------------ ------------------------------------------------------------- + */ +herr_t +H5DOread_chunk(hid_t dset_id, hid_t dxpl_id, const hsize_t *offset, uint32_t *filters, + void *buf) +{ + hbool_t created_dxpl = FALSE; /* Whether we created a DXPL */ + hbool_t do_direct_read = TRUE; /* Flag for direct writes */ + herr_t ret_value = FAIL; /* Return value */ + + /* Check arguments */ + if(dset_id < 0) + goto done; + if(!buf) + goto done; + if(!offset) + goto done; + if(!filters) + goto done; + + /* If the user passed in a default DXPL, create one to pass to H5Dwrite() */ + if(H5P_DEFAULT == dxpl_id) { + if((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0) + goto done; + created_dxpl = TRUE; + } /* end if */ + + /* Set direct write parameters */ + if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, &do_direct_read) < 0) + goto done; + if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME, &offset) < 0) + goto done; + + /* Read chunk */ + if(H5Dread(dset_id, 0, H5S_ALL, H5S_ALL, dxpl_id, buf) < 0) + goto done; + /* Get the filter mask */ + if(H5Pget(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME, filters) < 0) + goto done; + + /* Indicate success */ + ret_value = SUCCEED; + +done: + if(created_dxpl) { + if(H5Pclose(dxpl_id) < 0) + ret_value = FAIL; + } /* end if */ + else { + /* Reset the direct read flag on user DXPL */ + do_direct_read = FALSE; + if(H5Pset(dxpl_id, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, &do_direct_read) < 0) + ret_value = FAIL; + } + + return(ret_value); +} /* end H5DOread_chunk() */ |