/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by The HDF Group. * * 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* * Programmer: Quincey Koziol * Tuesday, November 10, 1998 * * Purpose: "None" selection data space I/O functions. */ #define H5S_PACKAGE /*suppress error about including H5Spkg */ #include "H5private.h" #include "H5Eprivate.h" #include "H5Iprivate.h" #include "H5Spkg.h" #include "H5VMprivate.h" #include "H5Dprivate.h" /* Static function prototypes */ /* Selection callbacks */ static herr_t H5S_none_copy(H5S_t *dst, const H5S_t *src, hbool_t share_selection); static herr_t H5S_none_get_seq_list(const H5S_t *space, unsigned flags, H5S_sel_iter_t *iter, size_t maxseq, size_t maxbytes, size_t *nseq, size_t *nbytes, hsize_t *off, size_t *len); static herr_t H5S_none_release(H5S_t *space); static htri_t H5S_none_is_valid(const H5S_t *space); static hssize_t H5S_none_serial_size(const H5S_t *space); static herr_t H5S_none_serialize(const H5S_t *space, uint8_t **p); static herr_t H5S_none_deserialize(H5S_t *space, const uint8_t **p); static herr_t H5S_none_bounds(const H5S_t *space, hsize_t *start, hsize_t *end); static herr_t H5S_none_offset(const H5S_t *space, hsize_t *off); static htri_t H5S_none_is_contiguous(const H5S_t *space); static htri_t H5S_none_is_single(const H5S_t *space); static htri_t H5S_none_is_regular(const H5S_t *space); static herr_t H5S_none_adjust_u(H5S_t *space, const hsize_t *offset); static herr_t H5S_none_project_scalar(const H5S_t *space, hsize_t *offset); static herr_t H5S_none_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset); static herr_t H5S_none_iter_init(H5S_sel_iter_t *iter, const H5S_t *space); /* Selection iteration callbacks */ static herr_t H5S_none_iter_coords(const H5S_sel_iter_t *iter, hsize_t *coords); static herr_t H5S_none_iter_block(const H5S_sel_iter_t *iter, hsize_t *start, hsize_t *end); static hsize_t H5S_none_iter_nelmts(const H5S_sel_iter_t *iter); static htri_t H5S_none_iter_has_next_block(const H5S_sel_iter_t *iter); static herr_t H5S_none_iter_next(H5S_sel_iter_t *sel_iter, size_t nelem); static herr_t H5S_none_iter_next_block(H5S_sel_iter_t *sel_iter); static herr_t H5S_none_iter_release(H5S_sel_iter_t *sel_iter); /* Selection properties for "none" selections */ const H5S_select_class_t H5S_sel_none[1] = {{ H5S_SEL_NONE, /* Methods on selection */ H5S_none_copy, H5S_none_get_seq_list, H5S_none_release, H5S_none_is_valid, H5S_none_serial_size, H5S_none_serialize, H5S_none_deserialize, H5S_none_bounds, H5S_none_offset, H5S_none_is_contiguous, H5S_none_is_single, H5S_none_is_regular, H5S_none_adjust_u, H5S_none_project_scalar, H5S_none_project_simple, H5S_none_iter_init, }}; /* Iteration properties for "none" selections */ static const H5S_sel_iter_class_t H5S_sel_iter_none[1] = {{ H5S_SEL_NONE, /* Methods on selection iterator */ H5S_none_iter_coords, H5S_none_iter_block, H5S_none_iter_nelmts, H5S_none_iter_has_next_block, H5S_none_iter_next, H5S_none_iter_next_block, H5S_none_iter_release, }}; /*------------------------------------------------------------------------- * Function: H5S_none_iter_init * * Purpose: Initializes iteration information for "none" selection. * * Return: non-negative on success, negative on failure. * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_none_iter_init(H5S_sel_iter_t *iter, const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space && H5S_SEL_NONE==H5S_GET_SELECT_TYPE(space)); HDassert(iter); /* Initialize type of selection iterator */ iter->type = H5S_sel_iter_none; FUNC_LEAVE_NOAPI(SUCCEED) } /* H5S_none_iter_init() */ /*------------------------------------------------------------------------- * Function: H5S_none_iter_coords * * Purpose: Retrieve the current coordinates of iterator for current * selection * * Return: non-negative on success, negative on failure * * Programmer: Quincey Koziol * Tuesday, April 22, 2003 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_none_iter_coords(const H5S_sel_iter_t UNUSED *iter, hsize_t UNUSED *coords) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); HDassert(coords); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_iter_coords() */ /*------------------------------------------------------------------------- * Function: H5S_none_iter_block * * Purpose: Retrieve the current block of iterator for current * selection * * Return: non-negative on success, negative on failure * * Programmer: Quincey Koziol * Monday, June 2, 2003 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_none_iter_block(const H5S_sel_iter_t UNUSED *iter, hsize_t UNUSED *start, hsize_t UNUSED *end) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); HDassert(start); HDassert(end); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_iter_block() */ /*------------------------------------------------------------------------- * Function: H5S_none_iter_nelmts * * Purpose: Return number of elements left to process in iterator * * Return: non-negative number of elements on success, zero on failure * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static hsize_t H5S_none_iter_nelmts(const H5S_sel_iter_t UNUSED *iter) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); FUNC_LEAVE_NOAPI(0) } /* H5S_none_iter_nelmts() */ /*-------------------------------------------------------------------------- NAME H5S_none_iter_has_next_block PURPOSE Check if there is another block left in the current iterator USAGE htri_t H5S_none_iter_has_next_block(iter) const H5S_sel_iter_t *iter; IN: Pointer to selection iterator RETURNS Non-negative (TRUE/FALSE) on success/Negative on failure DESCRIPTION Check if there is another block available in the selection iterator. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static htri_t H5S_none_iter_has_next_block(const H5S_sel_iter_t UNUSED *iter) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_iter_has_next_block() */ /*-------------------------------------------------------------------------- NAME H5S_none_iter_next PURPOSE Increment selection iterator USAGE herr_t H5S_none_iter_next(iter, nelem) H5S_sel_iter_t *iter; IN: Pointer to selection iterator size_t nelem; IN: Number of elements to advance by RETURNS Non-negative on success/Negative on failure DESCRIPTION Advance selection iterator to the NELEM'th next element in the selection. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_iter_next(H5S_sel_iter_t UNUSED *iter, size_t UNUSED nelem) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); HDassert(nelem>0); FUNC_LEAVE_NOAPI(SUCCEED) } /* H5S_none_iter_next() */ /*-------------------------------------------------------------------------- NAME H5S_none_iter_next_block PURPOSE Increment selection iterator to next block USAGE herr_t H5S_none_iter_next(iter) H5S_sel_iter_t *iter; IN: Pointer to selection iterator RETURNS Non-negative on success/Negative on failure DESCRIPTION Advance selection iterator to the next block in the selection. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_iter_next_block(H5S_sel_iter_t UNUSED *iter) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_iter_next_block() */ /*-------------------------------------------------------------------------- NAME H5S_none_iter_release PURPOSE Release "none" selection iterator information for a dataspace USAGE herr_t H5S_none_iter_release(iter) H5S_sel_iter_t *iter; IN: Pointer to selection iterator RETURNS Non-negative on success/Negative on failure DESCRIPTION Releases all information for a dataspace "none" selection iterator GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_iter_release(H5S_sel_iter_t UNUSED * iter) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(iter); FUNC_LEAVE_NOAPI(SUCCEED) } /* H5S_none_iter_release() */ /*-------------------------------------------------------------------------- NAME H5S_none_release PURPOSE Release none selection information for a dataspace USAGE herr_t H5S_none_release(space) H5S_t *space; IN: Pointer to dataspace RETURNS Non-negative on success/Negative on failure DESCRIPTION Releases "none" selection information for a dataspace GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_release(H5S_t UNUSED * space) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space); FUNC_LEAVE_NOAPI(SUCCEED) } /* H5S_none_release() */ /*-------------------------------------------------------------------------- NAME H5S_none_copy PURPOSE Copy a selection from one dataspace to another USAGE herr_t H5S_none_copy(dst, src) H5S_t *dst; OUT: Pointer to the destination dataspace H5S_t *src; IN: Pointer to the source dataspace RETURNS Non-negative on success/Negative on failure DESCRIPTION Copies the 'none' selection information from the source dataspace to the destination dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_copy(H5S_t *dst, const H5S_t UNUSED *src, hbool_t UNUSED share_selection) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(src); HDassert(dst); /* Set number of elements in selection */ dst->select.num_elem = 0; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5S_none_copy() */ /*-------------------------------------------------------------------------- NAME H5S_none_is_valid PURPOSE Check whether the selection fits within the extent, with the current offset defined. USAGE htri_t H5S_none_is_valid(space); H5S_t *space; IN: Dataspace pointer to query RETURNS TRUE if the selection fits within the extent, FALSE if it does not and Negative on an error. DESCRIPTION Determines if the current selection at the current offet fits within the extent for the dataspace. Offset is irrelevant for this type of selection. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static htri_t H5S_none_is_valid(const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); FUNC_LEAVE_NOAPI(TRUE) } /* end H5S_none_is_valid() */ /*-------------------------------------------------------------------------- NAME H5S_none_serial_size PURPOSE Determine the number of bytes needed to store the serialized "none" selection information. USAGE hssize_t H5S_none_serial_size(space) H5S_t *space; IN: Dataspace pointer to query RETURNS The number of bytes required on success, negative on an error. DESCRIPTION Determines the number of bytes required to serialize an "none" selection for storage on disk. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static hssize_t H5S_none_serial_size(const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); /* Basic number of bytes required to serialize point selection: * + + + * = 16 bytes */ FUNC_LEAVE_NOAPI(16) } /* end H5S_none_serial_size() */ /*-------------------------------------------------------------------------- NAME H5S_none_serialize PURPOSE Serialize the current selection into a user-provided buffer. USAGE herr_t H5S_none_serialize(space, p) const H5S_t *space; IN: Dataspace with selection to serialize uint8_t **p; OUT: Pointer to buffer to put serialized selection. Will be advanced to end of serialized selection. RETURNS Non-negative on success/Negative on failure DESCRIPTION Serializes the current element selection into a buffer. (Primarily for storing on disk). GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_serialize(const H5S_t *space, uint8_t **p) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); /* Store the preamble information */ UINT32ENCODE(*p, (uint32_t)H5S_GET_SELECT_TYPE(space)); /* Store the type of selection */ UINT32ENCODE(*p, (uint32_t)1); /* Store the version number */ UINT32ENCODE(*p, (uint32_t)0); /* Store the un-used padding */ UINT32ENCODE(*p, (uint32_t)0); /* Store the additional information length */ FUNC_LEAVE_NOAPI(SUCCEED) } /* H5S_none_serialize() */ /*-------------------------------------------------------------------------- NAME H5S_none_deserialize PURPOSE Deserialize the current selection from a user-provided buffer. USAGE herr_t H5S_none_deserialize(space, p) H5S_t *space; IN/OUT: Dataspace pointer to place selection into uint8 **p; OUT: Pointer to buffer holding serialized selection. Will be advanced to end of serialized selection. RETURNS Non-negative on success/Negative on failure DESCRIPTION Deserializes the current selection into a buffer. (Primarily for retrieving from disk). GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_deserialize(H5S_t *space, const uint8_t **p) { herr_t ret_value = SUCCEED; /* return value */ FUNC_ENTER_NOAPI_NOINIT HDassert(space); HDassert(p); HDassert(*p); /* Change to "none" selection */ if(H5S_select_none(space) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection") done: FUNC_LEAVE_NOAPI(ret_value) } /* H5S_none_deserialize() */ /*-------------------------------------------------------------------------- NAME H5S_none_bounds PURPOSE Gets the bounding box containing the selection. USAGE herr_t H5S_none_bounds(space, start, end) H5S_t *space; IN: Dataspace pointer of selection to query hsize_t *start; OUT: Starting coordinate of bounding box hsize_t *end; OUT: Opposite coordinate of bounding box RETURNS Non-negative on success, negative on failure DESCRIPTION Retrieves the bounding box containing the current selection and places it into the user's buffers. The start and end buffers must be large enough to hold the dataspace rank number of coordinates. The bounding box exactly contains the selection, ie. if a 2-D element selection is currently defined with the following points: (4,5), (6,8) (10,7), the bounding box with be (4, 5), (10, 8). Calling this function on a "none" selection returns fail. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_bounds(const H5S_t UNUSED *space, hsize_t UNUSED *start, hsize_t UNUSED *end) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); HDassert(start); HDassert(end); FUNC_LEAVE_NOAPI(FAIL) } /* H5Sget_none_bounds() */ /*-------------------------------------------------------------------------- NAME H5S_none_offset PURPOSE Gets the linear offset of the first element for the selection. USAGE herr_t H5S_none_offset(space, offset) const H5S_t *space; IN: Dataspace pointer of selection to query hsize_t *offset; OUT: Linear offset of first element in selection RETURNS Non-negative on success, negative on failure DESCRIPTION Retrieves the linear offset (in "units" of elements) of the first element selected within the dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS Calling this function on a "none" selection returns fail. EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_offset(const H5S_t UNUSED *space, hsize_t UNUSED *offset) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); HDassert(offset); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_offset() */ /*-------------------------------------------------------------------------- NAME H5S_none_is_contiguous PURPOSE Check if a "none" selection is contiguous within the dataspace extent. USAGE htri_t H5S_none_is_contiguous(space) H5S_t *space; IN: Dataspace pointer to check RETURNS TRUE/FALSE/FAIL DESCRIPTION Checks to see if the current selection in the dataspace is contiguous. This is primarily used for reading the entire selection in one swoop. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static htri_t H5S_none_is_contiguous(const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); FUNC_LEAVE_NOAPI(FALSE) } /* H5S_none_is_contiguous() */ /*-------------------------------------------------------------------------- NAME H5S_none_is_single PURPOSE Check if a "none" selection is a single block within the dataspace extent. USAGE htri_t H5S_none_is_single(space) H5S_t *space; IN: Dataspace pointer to check RETURNS TRUE/FALSE/FAIL DESCRIPTION Checks to see if the current selection in the dataspace is a single block. This is primarily used for reading the entire selection in one swoop. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static htri_t H5S_none_is_single(const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); FUNC_LEAVE_NOAPI(FALSE) } /* H5S_none_is_single() */ /*-------------------------------------------------------------------------- NAME H5S_none_is_regular PURPOSE Check if a "none" selection is "regular" USAGE htri_t H5S_none_is_regular(space) const H5S_t *space; IN: Dataspace pointer to check RETURNS TRUE/FALSE/FAIL DESCRIPTION Checks to see if the current selection in a dataspace is the a regular pattern. This is primarily used for reading the entire selection in one swoop. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static htri_t H5S_none_is_regular(const H5S_t UNUSED *space) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space); FUNC_LEAVE_NOAPI(TRUE) } /* H5S_none_is_regular() */ /*-------------------------------------------------------------------------- NAME H5S_none_adjust_u PURPOSE Adjust an "none" selection by subtracting an offset USAGE herr_t H5S_none_adjust_u(space, offset) H5S_t *space; IN/OUT: Pointer to dataspace to adjust const hsize_t *offset; IN: Offset to subtract RETURNS Non-negative on success, negative on failure DESCRIPTION Moves selection by subtracting an offset from it. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_adjust_u(H5S_t UNUSED *space, const hsize_t UNUSED *offset) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space); HDassert(offset); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_adjust_u() */ /*------------------------------------------------------------------------- * Function: H5S_none_project_scalar * * Purpose: Projects a 'none' selection into a scalar dataspace * * Return: non-negative on success, negative on failure. * * Programmer: Quincey Koziol * Sunday, July 18, 2010 * *------------------------------------------------------------------------- */ static herr_t H5S_none_project_scalar(const H5S_t UNUSED *space, hsize_t UNUSED *offset) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space && H5S_SEL_NONE == H5S_GET_SELECT_TYPE(space)); HDassert(offset); FUNC_LEAVE_NOAPI(FAIL) } /* H5S_none_project_scalar() */ /*------------------------------------------------------------------------- * Function: H5S_none_project_simple * * Purpose: Projects an 'none' selection onto/into a simple dataspace * of a different rank * * Return: non-negative on success, negative on failure. * * Programmer: Quincey Koziol * Sunday, July 18, 2010 * *------------------------------------------------------------------------- */ static herr_t H5S_none_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *offset) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT /* Check args */ HDassert(base_space && H5S_SEL_NONE == H5S_GET_SELECT_TYPE(base_space)); HDassert(new_space); HDassert(offset); /* Select the entire new space */ if(H5S_select_none(new_space) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "unable to set none selection") done: FUNC_LEAVE_NOAPI(ret_value) } /* H5S_none_project_simple() */ /*-------------------------------------------------------------------------- NAME H5S_select_none PURPOSE Specify that nothing is selected in the extent USAGE herr_t H5S_select_none(dsid) hid_t dsid; IN: Dataspace ID of selection to modify RETURNS Non-negative on success/Negative on failure DESCRIPTION This function de-selects the entire extent for a dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ herr_t H5S_select_none(H5S_t *space) { herr_t ret_value = SUCCEED; /* return value */ FUNC_ENTER_NOAPI(FAIL) /* Check args */ HDassert(space); /* Remove current selection first */ if(H5S_SELECT_RELEASE(space) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't release hyperslab") /* Set number of elements in selection */ space->select.num_elem = 0; /* Set selection type */ space->select.type = H5S_sel_none; done: FUNC_LEAVE_NOAPI(ret_value) } /* H5S_select_none() */ /*-------------------------------------------------------------------------- NAME H5Sselect_none PURPOSE Specify that nothing is selected in the extent USAGE herr_t H5Sselect_none(dsid) hid_t dsid; IN: Dataspace ID of selection to modify RETURNS Non-negative on success/Negative on failure DESCRIPTION This function de-selects the entire extent for a dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ herr_t H5Sselect_none(hid_t spaceid) { H5S_t *space; /* Dataspace to modify selection of */ herr_t ret_value = SUCCEED; /* return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "i", spaceid); /* Check args */ if(NULL == (space = (H5S_t *)H5I_object_verify(spaceid, H5I_DATASPACE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space") /* Change to "none" selection */ if(H5S_select_none(space) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection") done: FUNC_LEAVE_API(ret_value) } /* H5Sselect_none() */ /*-------------------------------------------------------------------------- NAME H5S_none_get_seq_list PURPOSE Create a list of offsets & lengths for a selection USAGE herr_t H5S_none_get_seq_list(space,flags,iter,maxseq,maxelem,nseq,nelem,off,len) H5S_t *space; IN: Dataspace containing selection to use. unsigned flags; IN: Flags for extra information about operation H5S_sel_iter_t *iter; IN/OUT: Selection iterator describing last position of interest in selection. size_t maxseq; IN: Maximum number of sequences to generate size_t maxelem; IN: Maximum number of elements to include in the generated sequences size_t *nseq; OUT: Actual number of sequences generated size_t *nelem; OUT: Actual number of elements in sequences generated hsize_t *off; OUT: Array of offsets size_t *len; OUT: Array of lengths RETURNS Non-negative on success/Negative on failure. DESCRIPTION Use the selection in the dataspace to generate a list of byte offsets and lengths for the region(s) selected. Start/Restart from the position in the ITER parameter. The number of sequences generated is limited by the MAXSEQ parameter and the number of sequences actually generated is stored in the NSEQ parameter. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static herr_t H5S_none_get_seq_list(const H5S_t UNUSED *space, unsigned UNUSED flags, H5S_sel_iter_t UNUSED *iter, size_t UNUSED maxseq, size_t UNUSED maxelem, size_t *nseq, size_t *nelem, hsize_t UNUSED *off, size_t UNUSED *len) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Check args */ HDassert(space); HDassert(iter); HDassert(maxseq > 0); HDassert(maxelem > 0); HDassert(nseq); HDassert(nelem); HDassert(off); HDassert(len); /* "none" selections don't generate sequences of bytes */ *nseq = 0; /* They don't use any elements, either */ *nelem = 0; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5S_none_get_seq_list() */