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Diffstat (limited to 'src/H5Doh.c')
| -rw-r--r-- | src/H5Doh.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/H5Doh.c b/src/H5Doh.c new file mode 100644 index 0000000..f9f9249 --- /dev/null +++ b/src/H5Doh.c @@ -0,0 +1,176 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by the Board of Trustees of the University of Illinois. * + * All rights reserved. * + * * + * 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/****************/ +/* Module Setup */ +/****************/ + +#define H5O_PACKAGE /*suppress error about including H5Opkg */ + +/***********/ +/* Headers */ +/***********/ +#include "H5private.h" /* Generic Functions */ +#include "H5Eprivate.h" /* Error handling */ +#include "H5FLprivate.h" /* Free lists */ +#include "H5Opkg.h" /* Object headers */ + +/****************/ +/* Local Macros */ +/****************/ + +/******************/ +/* Local Typedefs */ +/******************/ + +/********************/ +/* Local Prototypes */ +/********************/ +static htri_t H5O_dset_isa(H5O_t *loc); +static void *H5O_dset_get_copy_file_udata(void); +static void H5O_dset_free_copy_file_udata(void *); + +/*********************/ +/* Package Variables */ +/*********************/ + +/*****************************/ +/* Library Private Variables */ +/*****************************/ + +/*******************/ +/* Local Variables */ +/*******************/ + +/* This message derives from H5O object class */ +const H5O_obj_class_t H5O_OBJ_DATASET[1] = {{ + H5G_DATASET, /* object type */ + "dataset", /* object name, for debugging */ + H5O_dset_get_copy_file_udata, /* get 'copy file' user data */ + H5O_dset_free_copy_file_udata, /* free 'copy file' user data */ + H5O_dset_isa /* "isa" message */ +}}; + +/* Declare a free list to manage the H5D_copy_file_ud_t struct */ +H5FL_DEFINE(H5D_copy_file_ud_t); + + +/*------------------------------------------------------------------------- + * Function: H5O_dset_isa + * + * Purpose: Determines if an object has the requisite messages for being + * a dataset. + * + * Return: Success: TRUE if the required dataset messages are + * present; FALSE otherwise. + * + * Failure: FAIL if the existence of certain messages + * cannot be determined. + * + * Programmer: Robb Matzke + * Monday, November 2, 1998 + * + *------------------------------------------------------------------------- + */ +htri_t +H5O_dset_isa(H5O_t *oh) +{ + htri_t exists; /* Flag if header message of interest exists */ + htri_t ret_value = TRUE; /* Return value */ + + FUNC_ENTER_NOAPI(H5O_dset_isa, FAIL) + + HDassert(oh); + + /* Datatype */ + if((exists = H5O_exists_oh(oh, H5O_DTYPE_ID, 0)) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read object header") + else if(!exists) + HGOTO_DONE(FALSE) + + /* Layout */ + if((exists = H5O_exists_oh(oh, H5O_SDSPACE_ID, 0)) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read object header") + else if(!exists) + HGOTO_DONE(FALSE) + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5O_dset_isa() */ + + +/*------------------------------------------------------------------------- + * Function: H5O_dset_get_copy_file_udata + * + * Purpose: Allocates the user data needed for copying a dataset's + * object header from file to file. + * + * Return: Success: Non-NULL pointer to user data + * + * Failure: NULL + * + * Programmer: Quincey Koziol + * Monday, November 21, 2005 + * + *------------------------------------------------------------------------- + */ +static void * +H5O_dset_get_copy_file_udata(void) +{ + void *ret_value; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT(H5O_dset_get_copy_file_udata) + + /* Allocate space for the 'copy file' user data for copying datasets */ + if(NULL == (ret_value = H5FL_CALLOC(H5D_copy_file_ud_t))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5O_dset_get_copy_file_udata() */ + + +/*------------------------------------------------------------------------- + * Function: H5O_dset_free_copy_file_udata + * + * Purpose: Release the user data needed for copying a dataset's + * object header from file to file. + * + * Return: <none> + * + * Programmer: Quincey Koziol + * Monday, November 21, 2005 + * + *------------------------------------------------------------------------- + */ +static void +H5O_dset_free_copy_file_udata(void *_udata) +{ + H5D_copy_file_ud_t *udata = (H5D_copy_file_ud_t *)_udata; + + FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_dset_free_copy_file_udata) + + /* Sanity check */ + HDassert(udata); + + /* Release copy of dataset's datatype, if it was set */ + if(udata->src_dtype) + H5T_close(udata->src_dtype); + + /* Release space for 'copy file' user data */ + H5FL_FREE(H5D_copy_file_ud_t, udata); + + FUNC_LEAVE_NOAPI_VOID +} /* end H5O_dset_free_copy_file_udata() */ + |