diff options
Diffstat (limited to 'hl/src/H5DO.c')
| -rw-r--r-- | hl/src/H5DO.c | 81 |
1 files changed, 77 insertions, 4 deletions
diff --git a/hl/src/H5DO.c b/hl/src/H5DO.c index 8db6768..22d40fc 100644 --- a/hl/src/H5DO.c +++ b/hl/src/H5DO.c @@ -32,7 +32,7 @@ * Return: Non-negative on success/Negative on failure * * Programmer: Raymond Lu - * 30 July 2012 + * 30 July 2012 * *------------------------------------------------------------------------- */ @@ -60,7 +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 */ @@ -87,16 +87,87 @@ 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() */ + + +/*------------------------------------------------------------------------- * Function: H5DOappend() * * Purpose: To append elements to a dataset. @@ -122,6 +193,8 @@ done: * ret_value = FAIL; * goto done; * } + * + *------------------------------------------------------------------------- */ herr_t H5DOappend(hid_t dset_id, hid_t dxpl_id, unsigned axis, size_t extension, |