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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "h5tools_ref.h"
+#include "H5private.h"
+#include "h5tools.h"
+#include "h5tools_utils.h"
+
+
+/*
+ * Table to look up a path name for an object
+ * reference.
+ *
+ * This table stores mappings of reference -> path
+ * for all objects in the file that may be the target of
+ * an object reference.
+ *
+ * The 'path' is an absolute path by which the object
+ * can be accessed. When an object has > 1 such path,
+ * only one will be used in the table, with no particular
+ * method of selecting which one.
+ */
+
+
+extern hid_t thefile;
+extern char *prefix;
+extern char *progname;
+extern int d_status;
+
+
+
+ref_path_table_entry_t *ref_path_table = NULL; /* the table */
+
+/*-------------------------------------------------------------------------
+ * Function: ref_path_table_lookup
+ *
+ * Purpose: Looks up a table entry given a path name.
+ * Used during construction of the table.
+ *
+ * Return: The table entre (pte) or NULL if not in the
+ * table.
+ *
+ * Programmer: REMcG
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+ref_path_table_entry_t *
+ref_path_table_lookup(const char *thepath)
+{
+ H5G_stat_t sb;
+ ref_path_table_entry_t *pte = ref_path_table;
+
+ if(H5Gget_objinfo(thefile, thepath, TRUE, &sb)<0) {
+ /* fatal error ? */
+ return NULL;
+ }
+
+ while(pte!=NULL) {
+ if (sb.objno==pte->statbuf.objno)
+ return pte;
+ pte = pte->next;
+ }
+
+ return NULL;
+}
+
+/*-------------------------------------------------------------------------
+ * Function: ref_path_table_put
+ *
+ * Purpose: Enter the 'obj' with 'path' in the table if
+ * not already there.
+ * Create an object reference, pte, and store them
+ * in the table.
+ *
+ * Return: The object reference for the object.
+ *
+ * Programmer: REMcG
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+ref_path_table_entry_t *
+ref_path_table_put(hid_t obj, const char *path)
+{
+ ref_path_table_entry_t *pte;
+
+ /* look up 'obj'. If already in table, return */
+ pte = ref_path_table_lookup(path);
+ if (pte != NULL)
+ return pte;
+
+ /* if not found, then make new entry */
+
+ pte = (ref_path_table_entry_t *) malloc(sizeof(ref_path_table_entry_t));
+ if (pte == NULL) {
+ /* fatal error? */
+ return NULL;
+ }
+
+ pte->obj = obj;
+
+ pte->apath = HDstrdup(path);
+
+ if(H5Gget_objinfo(thefile, path, TRUE, &pte->statbuf)<0) {
+ /* fatal error? */
+ free(pte);
+ return NULL;
+ }
+
+ pte->next = ref_path_table;
+ ref_path_table = pte;
+
+ return pte;
+}
+
+/*
+ * counter used to disambiguate multiple instances of same object.
+ */
+int xid = 1;
+
+int get_next_xid() {
+ return xid++;
+}
+
+/*
+ * This counter is used to create fake object ID's
+ * The idea is to set it to the largest possible offest, which
+ * minimizes the chance of collision with a real object id.
+ *
+ */
+haddr_t fake_xid = HADDR_MAX;
+haddr_t
+get_fake_xid () {
+ return (fake_xid--);
+}
+
+/*
+ * for an object that does not have an object id (e.g., soft link),
+ * create a table entry with a fake object id as the key.
+ */
+
+ref_path_table_entry_t *
+ref_path_table_gen_fake(const char *path)
+{
+ ref_path_table_entry_t *pte;
+
+ /* look up 'obj'. If already in table, return */
+ pte = ref_path_table_lookup(path);
+ if (pte != NULL) {
+ return pte;
+ }
+
+ /* if not found, then make new entry */
+
+ pte = (ref_path_table_entry_t *) malloc(sizeof(ref_path_table_entry_t));
+ if (pte == NULL) {
+ /* fatal error? */
+ return NULL;
+ }
+
+ pte->obj = (hid_t)-1;
+
+ memset(&pte->statbuf,0,sizeof(H5G_stat_t));
+ pte->statbuf.objno = get_fake_xid();
+
+ pte->apath = HDstrdup(path);
+
+ pte->next = ref_path_table;
+ ref_path_table = pte;
+
+ return pte;
+}
+
+/*-------------------------------------------------------------------------
+ * Function: lookup_ref_path
+ *
+ * Purpose: Lookup the path to the object with refernce 'ref'.
+ *
+ * Return: Return a path to the object, or NULL if not found.
+ *
+ * Programmer: REMcG
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+char *
+lookup_ref_path(hobj_ref_t ref)
+{
+ ref_path_table_entry_t *pte = ref_path_table;
+
+ while(pte!=NULL) {
+ if (ref==pte->statbuf.objno)
+ return pte->apath;
+ pte = pte->next;
+ }
+ return NULL;
+}
+
+/*-------------------------------------------------------------------------
+ * Function: fill_ref_path_table
+ *
+ * Purpose: Called by interator to create references for
+ * all objects and enter them in the table.
+ *
+ * Return: Error status.
+ *
+ * Programmer: REMcG
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+fill_ref_path_table(hid_t group, const char *name, void UNUSED * op_data)
+{
+ hid_t obj;
+ char *tmp;
+ H5G_stat_t statbuf;
+ ref_path_table_entry_t *pte;
+ char *thepath;
+
+ H5Gget_objinfo(group, name, FALSE, &statbuf);
+ tmp = (char *) malloc(strlen(prefix) + strlen(name) + 2);
+
+ if (tmp == NULL)
+ return FAIL;
+
+ thepath = (char *) malloc(strlen(prefix) + strlen(name) + 2);
+
+ if (thepath == NULL) {
+ free(tmp);
+ return FAIL;
+ }
+
+ strcpy(tmp, prefix);
+
+ strcpy(thepath, prefix);
+ strcat(thepath, "/");
+ strcat(thepath, name);
+
+ switch (statbuf.type) {
+ case H5G_DATASET:
+ if ((obj = H5Dopen(group, name)) >= 0) {
+ pte = ref_path_table_lookup(thepath);
+ if (pte == NULL) {
+ ref_path_table_put(obj, thepath);
+ }
+ H5Dclose(obj);
+ } else {
+ error_msg(progname, "unable to get dataset \"%s\"\n", name);
+ d_status = EXIT_FAILURE;
+ }
+ break;
+ case H5G_GROUP:
+ if ((obj = H5Gopen(group, name)) >= 0) {
+ strcat(strcat(prefix, "/"), name);
+ pte = ref_path_table_lookup(thepath);
+ if (pte == NULL) {
+ ref_path_table_put(obj, thepath);
+ H5Giterate(obj, ".", NULL, fill_ref_path_table, NULL);
+ strcpy(prefix, tmp);
+ }
+ H5Gclose(obj);
+ } else {
+ error_msg(progname, "unable to dump group \"%s\"\n", name);
+ d_status = EXIT_FAILURE;
+ }
+ break;
+ case H5G_TYPE:
+ if ((obj = H5Topen(group, name)) >= 0) {
+ pte = ref_path_table_lookup(thepath);
+ if (pte == NULL) {
+ ref_path_table_put(obj, thepath);
+ }
+ H5Tclose(obj);
+ } else {
+ error_msg(progname, "unable to get dataset \"%s\"\n", name);
+ d_status = EXIT_FAILURE;
+ }
+ break;
+ default:
+ break;
+ }
+
+ free(tmp);
+ free(thepath);
+ return 0;
+}
+
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