/* * Copyright (C) 1998 NCSA * All rights reserved. * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Purpose: Point selection data space I/O functions. */ #include #include #include #include #include #include /* Interface initialization */ #define PABLO_MASK H5Spoint_mask #define INTERFACE_INIT NULL static intn interface_initialize_g = 0; static herr_t H5S_point_init (const struct H5O_layout_t *layout, const H5S_t *space, H5S_sel_iter_t *iter); static size_t H5S_point_favail (const H5S_t *space, const H5S_sel_iter_t *iter, size_t max); static size_t H5S_point_fgath (H5F_t *f, const struct H5O_layout_t *layout, const struct H5O_pline_t *pline, const struct H5O_fill_t *fill, const struct H5O_efl_t *efl, size_t elmt_size, const H5S_t *file_space, H5S_sel_iter_t *file_iter, size_t nelmts, const H5F_xfer_t *xfer_parms, void *buf/*out*/); static herr_t H5S_point_fscat (H5F_t *f, const struct H5O_layout_t *layout, const struct H5O_pline_t *pline, const struct H5O_fill_t *fill, const struct H5O_efl_t *efl, size_t elmt_size, const H5S_t *file_space, H5S_sel_iter_t *file_iter, size_t nelmts, const H5F_xfer_t *xfer_parms, const void *buf); static size_t H5S_point_mgath (const void *_buf, size_t elmt_size, const H5S_t *mem_space, H5S_sel_iter_t *mem_iter, size_t nelmts, void *_tconv_buf/*out*/); static herr_t H5S_point_mscat (const void *_tconv_buf, size_t elmt_size, const H5S_t *mem_space, H5S_sel_iter_t *mem_iter, size_t nelmts, void *_buf/*out*/); const H5S_fconv_t H5S_POINT_FCONV[1] = {{ "point", /*name */ H5S_SEL_POINTS, /*selection type */ H5S_point_init, /*initialize */ H5S_point_favail, /*available */ H5S_point_fgath, /*gather */ H5S_point_fscat, /*scatter */ }}; const H5S_mconv_t H5S_POINT_MCONV[1] = {{ "point", /*name */ H5S_SEL_POINTS, /*selection type */ H5S_point_init, /*initialize */ H5S_point_mgath, /*gather */ H5S_point_mscat, /*scatter */ }}; /*------------------------------------------------------------------------- * Function: H5S_point_init * * Purpose: Initializes iteration information for point selection. * * Return: non-negative on success, negative on failure. * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_point_init (const struct H5O_layout_t UNUSED *layout, const H5S_t *space, H5S_sel_iter_t *sel_iter) { FUNC_ENTER (H5S_point_init, FAIL); /* Check args */ assert (layout); assert (space && H5S_SEL_POINTS==space->select.type); assert (sel_iter); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ /* Initialize the number of points to iterate over */ sel_iter->pnt.elmt_left=space->select.num_elem; /* Start at the head of the list of points */ sel_iter->pnt.curr=space->select.sel_info.pnt_lst->head; FUNC_LEAVE (SUCCEED); } /*-------------------------------------------------------------------------- NAME H5S_point_add PURPOSE Add a series of elements to a point selection USAGE herr_t H5S_point_add(space, num_elem, coord) H5S_t *space; IN: Dataspace of selection to modify size_t num_elem; IN: Number of elements in COORD array. const hssize_t *coord[]; IN: The location of each element selected RETURNS Non-negative on success/Negative on failure DESCRIPTION This function adds elements to the current point selection for a dataspace GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ herr_t H5S_point_add (H5S_t *space, size_t num_elem, const hssize_t **_coord) { H5S_pnt_node_t *top, *curr, *new; /* Point selection nodes */ const hssize_t *coord=(const hssize_t *)_coord; /* Pointer to the actual coordinates */ uintn i; /* Counter */ herr_t ret_value=FAIL; /* return value */ FUNC_ENTER (H5S_point_add, FAIL); assert(space); assert(num_elem>0); assert(coord); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ top=curr=NULL; for(i=0; iextent.u.simple.rank); #endif /* QAK */ if((new->pnt = H5MM_malloc(space->extent.u.simple.rank*sizeof(hssize_t)))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate coordinate information"); #ifdef QAK printf("%s: check 1.2\n",FUNC); #endif /* QAK */ /* Copy over the coordinates */ HDmemcpy(new->pnt,coord+(i*space->extent.u.simple.rank),(space->extent.u.simple.rank*sizeof(hssize_t))); #ifdef QAK printf("%s: check 1.3\n",FUNC); { intn j; for(j=0; jextent.u.simple.rank; j++) { printf("%s: pnt[%d]=%d\n",FUNC,(int)j,(int)new->pnt[j]); printf("%s: coord[%d][%d]=%d\n", FUNC, (int)i, (int)j, (int)*(coord+(i*space->extent.u.simple.rank)+j)); } } #endif /* QAK */ /* Link into list */ new->next=NULL; if(top==NULL) top=new; else curr->next=new; curr=new; } /* end for */ #ifdef QAK printf("%s: check 2.0\n",FUNC); #endif /* QAK */ /* Append current list, if there is one */ if(space->select.sel_info.pnt_lst->head!=NULL) curr->next=space->select.sel_info.pnt_lst->head; /* Put new list in point selection */ space->select.sel_info.pnt_lst->head=top; /* Add the number of elements in the new selection */ space->select.num_elem+=num_elem; ret_value=SUCCEED; #ifdef QAK printf("%s: check 3.0\n",FUNC); #endif /* QAK */ done: FUNC_LEAVE (ret_value); } /* H5S_point_add() */ /*------------------------------------------------------------------------- * Function: H5S_point_favail * * Purpose: Figure out the optimal number of elements to transfer to/from the file * * Return: non-negative number of elements on success, negative on failure * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static size_t H5S_point_favail (const H5S_t UNUSED *space, const H5S_sel_iter_t *sel_iter, size_t max) { FUNC_ENTER (H5S_point_favail, FAIL); /* Check args */ assert (space && H5S_SEL_POINTS==space->select.type); assert (sel_iter); #ifdef QAK printf("%s: check 1.0, ret=%d\n", FUNC,(int)MIN(sel_iter->pnt.elmt_left,max)); #endif /* QAK */ FUNC_LEAVE (MIN(sel_iter->pnt.elmt_left,max)); } /* H5S_point_favail() */ /*------------------------------------------------------------------------- * Function: H5S_point_fgath * * Purpose: Gathers data points from file F and accumulates them in the * type conversion buffer BUF. The LAYOUT argument describes * how the data is stored on disk and EFL describes how the data * is organized in external files. ELMT_SIZE is the size in * bytes of a datum which this function treats as opaque. * FILE_SPACE describes the data space of the dataset on disk * and the elements that have been selected for reading (via * hyperslab, etc). This function will copy at most NELMTS * elements. * * Notes: This could be optimized by gathering selected elements near (how * near?) each other into one I/O request and then moving the correct * elements into the return buffer * * Return: Success: Number of elements copied. * * Failure: 0 * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static size_t H5S_point_fgath (H5F_t *f, const struct H5O_layout_t *layout, const struct H5O_pline_t *pline, const struct H5O_fill_t *fill, const struct H5O_efl_t *efl, size_t elmt_size, const H5S_t *file_space, H5S_sel_iter_t *file_iter, size_t nelmts, const H5F_xfer_t *xfer_parms, void *_buf/*out*/) { hssize_t file_offset[H5O_LAYOUT_NDIMS]; /*offset of slab in file*/ hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */ hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero */ uint8_t *buf=(uint8_t *)_buf; /* Alias for pointer arithmetic */ uintn ndims; /* Number of dimensions of dataset */ intn i; /*counters */ size_t num_read; /* number of elements read into buffer */ FUNC_ENTER (H5S_point_fgath, 0); /* Check args */ assert (f); assert (layout); assert (elmt_size>0); assert (file_space); assert (file_iter); assert (nelmts>0); assert (buf); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ ndims=file_space->extent.u.simple.rank; /* initialize hyperslab size and offset in memory buffer */ for(i=0; i<(int)(ndims+1); i++) { hsize[i]=1; /* hyperslab size is 1, except for last element */ zero[i]=0; /* memory offset is 0 */ } /* end for */ hsize[ndims] = elmt_size; /* * Walk though and request each element we need and put it into the * buffer. */ num_read=0; while(num_readpnt.elmt_left>0) { /* Copy the location of the point to get */ HDmemcpy(file_offset, file_iter->pnt.curr->pnt, ndims*sizeof(hssize_t)); file_offset[ndims] = 0; /* Add in the offset */ for(i=0; iextent.u.simple.rank; i++) file_offset[i] += file_space->select.offset[i]; /* Go read the point */ if (H5F_arr_read (f, xfer_parms, layout, pline, fill, efl, hsize, hsize, zero, file_offset, buf/*out*/)<0) { HRETURN_ERROR (H5E_DATASPACE, H5E_READERROR, 0, "read error"); } #ifdef QAK printf("%s: check 3.0\n",FUNC); { for(i=0; ipnt.curr->pnt[i]); printf("%s: %d - file_offset=%d\n", FUNC, (int)i, (int)file_offset[i]); } printf("%s: *buf=%u\n",FUNC,(unsigned)*buf); } #endif /* QAK */ /* Increment the offset of the buffer */ buf+=elmt_size; /* Increment the count read */ num_read++; /* Advance the point iterator */ file_iter->pnt.elmt_left--; file_iter->pnt.curr=file_iter->pnt.curr->next; } else { break; /* out of elements in the selection */ } /* end else */ } /* end while */ FUNC_LEAVE (num_read); } /* H5S_point_fgath() */ /*------------------------------------------------------------------------- * Function: H5S_point_fscat * * Purpose: Scatters dataset elements from the type conversion buffer BUF * to the file F where the data points are arranged according to * the file data space FILE_SPACE and stored according to * LAYOUT and EFL. Each element is ELMT_SIZE bytes. * The caller is requesting that NELMTS elements are copied. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_point_fscat (H5F_t *f, const struct H5O_layout_t *layout, const struct H5O_pline_t *pline, const struct H5O_fill_t *fill, const struct H5O_efl_t *efl, size_t elmt_size, const H5S_t *file_space, H5S_sel_iter_t *file_iter, size_t nelmts, const H5F_xfer_t *xfer_parms, const void *_buf) { hssize_t file_offset[H5O_LAYOUT_NDIMS]; /*offset of hyperslab */ hsize_t hsize[H5O_LAYOUT_NDIMS]; /*size of hyperslab */ hssize_t zero[H5O_LAYOUT_NDIMS]; /*zero vector */ const uint8_t *buf=(const uint8_t *)_buf; /* Alias for pointer arithmetic */ uintn ndims; /* Number of dimensions of dataset */ intn i; /*counters */ size_t num_written; /* number of elements written from buffer */ FUNC_ENTER (H5S_point_fscat, FAIL); /* Check args */ assert (f); assert (layout); assert (elmt_size>0); assert (file_space); assert (file_iter); assert (nelmts>0); assert (buf); #ifdef QAK printf("%s: check 1.0, layout->ndims=%d\n",FUNC,(int)layout->ndims); #endif /* QAK */ ndims=file_space->extent.u.simple.rank; /* initialize hyperslab size and offset in memory buffer */ for(i=0; i<(int)(ndims+1); i++) { hsize[i]=1; /* hyperslab size is 1, except for last element */ zero[i]=0; /* memory offset is 0 */ } /* end for */ hsize[ndims] = elmt_size; /* * Walk though and request each element we need and put it into the * buffer. */ num_written=0; while(num_writtenpnt.elmt_left>0) { #ifdef QAK printf("%s: check 2.0\n",FUNC); { for(i=0; ipnt.curr->pnt[i]); } } #endif /* QAK */ /* Copy the location of the point to get */ HDmemcpy(file_offset,file_iter->pnt.curr->pnt,ndims*sizeof(hssize_t)); file_offset[ndims] = 0; /* Add in the offset, if there is one */ for(i=0; iextent.u.simple.rank; i++) file_offset[i] += file_space->select.offset[i]; #ifdef QAK printf("%s: check 3.0\n",FUNC); { for(i=0; ipnt.curr->pnt[i]); printf("%s: %d - file_offset=%d\n", FUNC,(int)i,(int)file_offset[i]); } printf("%s: *buf=%u\n",FUNC,(unsigned)*buf); } #endif /* QAK */ /* Go write the point */ if (H5F_arr_write (f, xfer_parms, layout, pline, fill, efl, hsize, hsize, zero, file_offset, buf)<0) { HRETURN_ERROR (H5E_DATASPACE, H5E_WRITEERROR, 0, "write error"); } /* Increment the offset of the buffer */ buf+=elmt_size; /* Increment the count read */ num_written++; /* Advance the point iterator */ file_iter->pnt.elmt_left--; file_iter->pnt.curr=file_iter->pnt.curr->next; #ifdef QAK printf("%s: check 5.0, file_iter->pnt.curr=%p\n", FUNC,file_iter->pnt.curr); #endif } /* end while */ FUNC_LEAVE (num_written>0 ? SUCCEED : FAIL); } /* H5S_point_fscat() */ /*------------------------------------------------------------------------- * Function: H5S_point_mgath * * Purpose: Gathers dataset elements from application memory BUF and * copies them into the data type conversion buffer TCONV_BUF. * Each element is ELMT_SIZE bytes and arranged in application * memory according to MEM_SPACE. * The caller is requesting that at most NELMTS be gathered. * * Return: Success: Number of elements copied. * * Failure: 0 * * Programmer: Quincey Koziol * Tuesday, June 16, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static size_t H5S_point_mgath (const void *_buf, size_t elmt_size, const H5S_t *mem_space, H5S_sel_iter_t *mem_iter, size_t nelmts, void *_tconv_buf/*out*/) { hsize_t mem_size[H5O_LAYOUT_NDIMS]; /*total size of app buf */ const uint8_t *buf=(const uint8_t *)_buf; /* Get local copies for address arithmetic */ uint8_t *tconv_buf=(uint8_t *)_tconv_buf; hsize_t acc; /* coordinate accumulator */ hsize_t off; /* coordinate offset */ intn space_ndims; /*dimensionality of space*/ intn i; /*counters */ size_t num_gath; /* number of elements gathered */ FUNC_ENTER (H5S_point_mgath, 0); /* Check args */ assert (buf); assert (elmt_size>0); assert (mem_space && H5S_SEL_POINTS==mem_space->select.type); assert (nelmts>0); assert (tconv_buf); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ if ((space_ndims=H5S_get_simple_extent_dims (mem_space, mem_size, NULL))<0) { HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, 0, "unable to retrieve data space dimensions"); } for(num_gath=0; num_gathpnt.elmt_left>0) { /* Compute the location of the point to get */ for(i=space_ndims-1,acc=1,off=0; i>=0; i--) { off+=(mem_iter->pnt.curr->pnt[i]+mem_space->select.offset[i])*acc; acc*=mem_size[i]; } /* end for */ #ifdef QAK printf("%s: check 2.0, acc=%d, off=%d\n",FUNC,(int)acc,(int)off); #endif /* QAK */ /* Copy the elements into the type conversion buffer */ HDmemcpy(tconv_buf,buf+off,elmt_size); /* Increment the offset of the buffers */ tconv_buf+=elmt_size; /* Advance the point iterator */ mem_iter->pnt.elmt_left--; mem_iter->pnt.curr=mem_iter->pnt.curr->next; } else { break; /* out of elements in the selection */ } /* end else */ } /* end for */ FUNC_LEAVE (num_gath); } /* H5S_point_mgath() */ /*------------------------------------------------------------------------- * Function: H5S_point_mscat * * Purpose: Scatters NELMTS data points from the type conversion buffer * TCONV_BUF to the application buffer BUF. Each element is * ELMT_SIZE bytes and they are organized in application memory * according to MEM_SPACE. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Wednesday, June 17, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5S_point_mscat (const void *_tconv_buf, size_t elmt_size, const H5S_t *mem_space, H5S_sel_iter_t *mem_iter, size_t nelmts, void *_buf/*out*/) { hsize_t mem_size[H5O_LAYOUT_NDIMS]; /*total size of app buf */ uint8_t *buf=(uint8_t *)_buf; /* Get local copies for address arithmetic */ const uint8_t *tconv_buf=(const uint8_t *)_tconv_buf; hsize_t acc; /* coordinate accumulator */ hsize_t off; /* coordinate offset */ intn space_ndims; /*dimensionality of space*/ intn i; /*counters */ size_t num_scat; /* Number of elements scattered */ FUNC_ENTER (H5S_point_mscat, FAIL); /* Check args */ assert (tconv_buf); assert (elmt_size>0); assert (mem_space && H5S_SEL_POINTS==mem_space->select.type); assert (nelmts>0); assert (buf); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ /* * Retrieve hyperslab information to determine what elements are being * selected (there might be other selection methods in the future). We * only handle hyperslabs with unit sample because there's currently no * way to pass sample information to H5V_hyper_copy(). */ if ((space_ndims=H5S_get_simple_extent_dims (mem_space, mem_size, NULL))<0) { HRETURN_ERROR (H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to retrieve data space dimensions"); } for(num_scat=0; num_scatpnt.elmt_left>0) { /* Compute the location of the point to get */ for(i=space_ndims-1,acc=1,off=0; i>=0; i--) { off+=(mem_iter->pnt.curr->pnt[i]+mem_space->select.offset[i])*acc; acc*=mem_size[i]; } /* end for */ /* Copy the elements into the type conversion buffer */ HDmemcpy(buf+off,tconv_buf,elmt_size); /* Increment the offset of the buffers */ tconv_buf+=elmt_size; /* Advance the point iterator */ mem_iter->pnt.elmt_left--; mem_iter->pnt.curr=mem_iter->pnt.curr->next; } else { break; /* out of elements in the selection */ } /* end else */ } /* end for */ FUNC_LEAVE (SUCCEED); } /* H5S_point_mscat() */ /*-------------------------------------------------------------------------- NAME H5S_point_release PURPOSE Release point selection information for a dataspace USAGE herr_t H5S_point_release(space) H5S_t *space; IN: Pointer to dataspace RETURNS Non-negative on success/Negative on failure DESCRIPTION Releases all point selection information for a dataspace GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ herr_t H5S_point_release (H5S_t *space) { H5S_pnt_node_t *curr, *next; /* Point selection nodes */ FUNC_ENTER (H5S_point_release, FAIL); /* Check args */ assert (space); /* Delete all the nodes from the list */ curr=space->select.sel_info.pnt_lst->head; while(curr!=NULL) { next=curr->next; H5MM_xfree(curr->pnt); H5MM_xfree(curr); curr=next; } /* end while */ /* Free & reset the point list header */ H5MM_xfree(space->select.sel_info.pnt_lst); space->select.sel_info.pnt_lst=NULL; /* Reset the number of elements in the selection */ space->select.num_elem=0; FUNC_LEAVE (SUCCEED); } /* H5S_point_release() */ /*-------------------------------------------------------------------------- NAME H5S_point_npoints PURPOSE Compute number of elements in current selection USAGE hsize_t H5S_point_npoints(space) H5S_t *space; IN: Pointer to dataspace RETURNS The number of elements in selection on success, 0 on failure DESCRIPTION Compute number of elements in current selection. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ hsize_t H5S_point_npoints (const H5S_t *space) { FUNC_ENTER (H5S_point_npoints, 0); /* Check args */ assert (space); #ifdef QAK printf("%s: check 1.0, nelmts=%d\n",FUNC,(int)space->select.num_elem); #endif /* QAK */ FUNC_LEAVE (space->select.num_elem); } /* H5S_point_npoints() */ /*-------------------------------------------------------------------------- NAME H5S_point_copy PURPOSE Copy a selection from one dataspace to another USAGE herr_t H5S_point_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 all the point selection information from the source dataspace to the destination dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ herr_t H5S_point_copy (H5S_t *dst, const H5S_t *src) { H5S_pnt_node_t *curr, *new, *new_head; /* Point information nodes */ herr_t ret_value=SUCCEED; /* return value */ FUNC_ENTER (H5S_point_copy, FAIL); assert(src); assert(dst); #ifdef QAK printf("%s: check 1.0\n",FUNC); #endif /* QAK */ /* Allocate room for the head of the point list */ if((dst->select.sel_info.pnt_lst=H5MM_malloc(sizeof(H5S_pnt_list_t)))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate point node"); curr=src->select.sel_info.pnt_lst->head; new_head=NULL; while(curr!=NULL) { /* Create each point */ if((new=H5MM_malloc(sizeof(H5S_pnt_node_t)))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate point node"); if((new->pnt = H5MM_malloc(src->extent.u.simple.rank*sizeof(hssize_t)))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate coordinate information"); HDmemcpy(new->pnt,curr->pnt,(src->extent.u.simple.rank*sizeof(hssize_t))); new->next=NULL; #ifdef QAK printf("%s: check 5.0\n",FUNC); { intn i; for(i=0; iextent.u.simple.rank; i++) printf("%s: check 5.1, new->pnt[%d]=%d\n",FUNC,i,(int)new->pnt[i]); } #endif /* QAK */ /* Keep the order the same when copying */ if(new_head==NULL) new_head=dst->select.sel_info.pnt_lst->head=new; else { new_head->next=new; new_head=new; } /* end else */ curr=curr->next; } /* end while */ #ifdef QAK printf("%s: check 10.0 src->select.sel_info.pnt_lst=%p, dst->select.sel_info.pnt_lst=%p\n",FUNC,src->select.sel_info.pnt_lst,dst->select.sel_info.pnt_lst); printf("%s: check 10.0 src->select.sel_info.pnt_lst->head=%p, dst->select.sel_info.pnt_lst->head=%p\n",FUNC,src->select.sel_info.pnt_lst->head,dst->select.sel_info.pnt_lst->head); #endif /* QAK */ done: FUNC_LEAVE (ret_value); } /* end H5S_point_copy() */ /*-------------------------------------------------------------------------- NAME H5S_point_select_valid PURPOSE Check whether the selection fits within the extent, with the current offset defined. USAGE htri_t H5S_point_select_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. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ htri_t H5S_point_select_valid (const H5S_t *space) { H5S_pnt_node_t *curr; /* Point information nodes */ intn i; /* Counter */ htri_t ret_value=TRUE; /* return value */ FUNC_ENTER (H5S_point_select_valid, FAIL); assert(space); /* Check each point to determine whether selection+offset is within extent */ curr=space->select.sel_info.pnt_lst->head; while(curr!=NULL) { /* Check each dimension */ for(i=0; iextent.u.simple.rank; i++) { /* Check if an offset has been defined */ /* Bounds check the selected point + offset against the extent */ if(((curr->pnt[i]+space->select.offset[i])>(hssize_t)space->extent.u.simple.size[i]) || ((curr->pnt[i]+space->select.offset[i])<0)) { ret_value=FALSE; break; } /* end if */ } /* end for */ curr=curr->next; } /* end while */ FUNC_LEAVE (ret_value); } /* end H5S_point_select_valid() */ /*-------------------------------------------------------------------------- NAME H5S_point_select_serial_size PURPOSE Determine the number of bytes needed to store the serialized point selection information. USAGE hssize_t H5S_point_select_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 the current point selection information for storage on disk. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ hssize_t H5S_point_select_serial_size (const H5S_t *space) { H5S_pnt_node_t *curr; /* Point information nodes */ hssize_t ret_value=FAIL; /* return value */ FUNC_ENTER (H5S_point_select_serial_size, FAIL); assert(space); /* Basic number of bytes required to serialize point selection: * + + + * + + <# of points (4 bytes)> = 24 bytes */ ret_value=24; /* Count points in selection */ curr=space->select.sel_info.pnt_lst->head; while(curr!=NULL) { /* Add 4 bytes times the rank for each element selected */ ret_value+=4*space->extent.u.simple.rank; curr=curr->next; } /* end while */ FUNC_LEAVE (ret_value); } /* end H5S_point_select_serial_size() */ /*-------------------------------------------------------------------------- NAME H5S_point_select_serialize PURPOSE Serialize the current selection into a user-provided buffer. USAGE herr_t H5S_point_select_serialize(space, buf) H5S_t *space; IN: Dataspace pointer of selection to serialize uint8 *buf; OUT: Buffer to put serialized selection into 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 --------------------------------------------------------------------------*/ herr_t H5S_point_select_serialize (const H5S_t *space, uint8_t *buf) { H5S_pnt_node_t *curr; /* Point information nodes */ uint8_t *lenp; /* pointer to length location for later storage */ uint32_t len=0; /* number of bytes used */ intn i; /* local counting variable */ herr_t ret_value=FAIL; /* return value */ FUNC_ENTER (H5S_point_select_serialize, FAIL); assert(space); /* Store the preamble information */ UINT32ENCODE(buf, (uint32_t)space->select.type); /* Store the type of selection */ UINT32ENCODE(buf, (uint32_t)1); /* Store the version number */ UINT32ENCODE(buf, (uint32_t)0); /* Store the un-used padding */ lenp=buf; /* keep the pointer to the length location for later */ buf+=4; /* skip over space for length */ /* Encode number of dimensions */ INT32ENCODE(buf, (uint32_t)space->extent.u.simple.rank); len+=4; /* Encode number of elements */ UINT32ENCODE(buf, (uint32_t)space->select.num_elem); len+=4; /* Encode each point in selection */ curr=space->select.sel_info.pnt_lst->head; while(curr!=NULL) { /* Add 4 bytes times the rank for each element selected */ len+=4*space->extent.u.simple.rank; /* Encode each point */ for(i=0; iextent.u.simple.rank; i++) UINT32ENCODE(buf, (uint32_t)curr->pnt[i]); curr=curr->next; } /* end while */ /* Encode length */ UINT32ENCODE(lenp, (uint32_t)len); /* Store the length of the extra information */ /* Set success */ ret_value=SUCCEED; FUNC_LEAVE (ret_value); } /* H5S_point_select_serialize() */ /*-------------------------------------------------------------------------- NAME H5S_point_select_deserialize PURPOSE Deserialize the current selection from a user-provided buffer. USAGE herr_t H5S_point_select_deserialize(space, buf) H5S_t *space; IN/OUT: Dataspace pointer to place selection into uint8 *buf; IN: Buffer to retrieve serialized selection from 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 --------------------------------------------------------------------------*/ herr_t H5S_point_select_deserialize (H5S_t *space, const uint8_t *buf) { H5S_seloper_t op=H5S_SELECT_SET; /* Selection operation */ int32_t rank; /* Rank of points */ size_t num_elem=0; /* Number of elements in selection */ hssize_t *coord=NULL, *tcoord; /* Pointer to array of elements */ uintn i,j; /* local counting variables */ herr_t ret_value=FAIL; /* return value */ FUNC_ENTER (H5S_point_select_deserialize, FAIL); /* Check args */ assert(space); assert(buf); /* Deserialize points to select */ buf+=16; /* Skip over selection header */ INT32DECODE(buf,rank); /* decode the rank of the point selection */ if(rank!=space->extent.u.simple.rank) HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "rank of pointer does not match dataspace"); UINT32DECODE(buf,num_elem); /* decode the number of points */ /* Allocate space for the coordinates */ if((coord = H5MM_malloc(num_elem*rank*sizeof(hssize_t)))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate coordinate information"); /* Retrieve the coordinates from the buffer */ for(tcoord=coord,i=0; iextent.u.simple.rank; /* Iterate through the node, checking the bounds on each element */ node=space->select.sel_info.pnt_lst->head; while(node!=NULL) { for(i=0; i(hsize_t)(node->pnt[i]+space->select.offset[i])) start[i]=node->pnt[i]+space->select.offset[i]; if(end[i]<(hsize_t)(node->pnt[i]+space->select.offset[i])) end[i]=node->pnt[i]+space->select.offset[i]; } /* end for */ node=node->next; } /* end while */ FUNC_LEAVE (ret_value); } /* H5Sget_point_bounds() */