[svn-r766] Checkpointing the reference code.

8 files changed, 168 insertions, 233 deletions

diff --git a/src/H5.c b/src/H5.c
index f0de26e..8e35cc9 100644
--- a/src/H5.c
+++ b/src/H5.c
@@ -1938,33 +1938,14 @@ H5_trace (hbool_t returning, const char *func, const char *type, ...)
 
 	case 'r':
 	    if (ptr) {
-		if (vp) {
-		    fprintf (out, "0x%lx", (unsigned long)vp);
-		} else {
-		    fprintf(out, "NULL");
-		}
+            if (vp) {
+                fprintf (out, "0x%lx", (unsigned long)vp);
+            } else {
+                fprintf(out, "NULL");
+            }
 	    } else {
-		href_t ref = va_arg (ap, href_t);
-		switch (ref.type) {
-		case H5R_BADTYPE:
-		    fprintf (out, "H5R_BADTYPE");
-		    break;
-		case H5R_OBJECT:
-		    fprintf (out, "H5R_OBJECT");
-		    break;
-		case H5R_DATASET_REGION:
-		    fprintf (out, "H5R_DATASET_REGION");
-		    break;
-		case H5R_INTERNAL:
-		    fprintf (out, "H5R_INTERNAL");
-		    break;
-		case H5R_MAXTYPE:
-		    fprintf (out, "H5R_MAXTYPE");
-		    break;
-		default:
-		    fprintf (out, "BADTYPE(%ld)", (long)ref.type);
-		    break;
-		}
+            href_t ref = va_arg (ap, href_t);
+            fprintf (out, "Reference Object=%p", &ref);
 	    }
 	    break;
 
diff --git a/src/H5D.c b/src/H5D.c
index 6f5ca00..e24fe4f 100644
--- a/src/H5D.c
+++ b/src/H5D.c
@@ -1865,6 +1865,7 @@ H5D_write(H5D_t *dataset, const H5T_t *mem_type, const H5S_t *mem_space,
 			"unable to register types for conversion");
 	}
     }
+printf("%s: after H5T_find, tconv_func=%p\n",FUNC,tconv_func);
     if (NULL==(sconv=H5S_find(mem_space, file_space))) {
 	HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL,
 		     "unable to convert from memory to file data space");
diff --git a/src/H5O.c b/src/H5O.c
index 0902b1c..342643d 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -1044,6 +1044,11 @@ H5O_find_in_ohdr(H5F_t *f, const haddr_t *addr, const H5O_class_t **type_p,
     assert(addr && H5F_addr_defined(addr));
     assert(type_p);
 
+printf("%s: addr=",FUNC);
+H5F_addr_print(stdout,addr);
+printf("\n%s: f=%p, addr=%p\n",FUNC,f,addr);
+printf("%s: f->shared=%p\n",FUNC,f->shared);
+printf("%s: H5AC_HASH=%lu\n",FUNC,(unsigned long)H5AC_HASH(f,addr));
     /* Load the object header */
     if (NULL == (oh = H5AC_find(f, H5AC_OHDR, addr, NULL, NULL))) {
 	HRETURN_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL,
diff --git a/src/H5R.c b/src/H5R.c
index 48051de..f936202 100644
--- a/src/H5R.c
+++ b/src/H5R.c
@@ -34,9 +34,8 @@ static void		H5R_term_interface(void);
 /* Static functions */
 static herr_t H5R_create(href_t *ref, H5G_entry_t *loc, const char *name,
         H5R_type_t ref_type, H5S_t *space);
-static hid_t H5R_dereference(href_t *ref);
+static hid_t H5R_dereference(H5D_t *dset, href_t *ref);
 static H5S_t * H5R_get_space(href_t *ref);
-static H5R_type_t H5R_get_type(href_t *ref);
 
 
 /*--------------------------------------------------------------------------
@@ -136,10 +135,8 @@ H5R_create(href_t *ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type,
         HGOTO_ERROR (H5E_REFERENCE, H5E_NOTFOUND, FAIL, "unable to stat object");
 
     /* Set information for reference */
-    ref->type=ref_type;
-    ref->objno[0]=sb.objno[0];
-    ref->objno[1]=sb.objno[1];
-    ref->file=loc->file;
+    ref->oid[0]=sb.objno[0];
+    ref->oid[1]=sb.objno[1];
 
     /* Return success */
     ret_value=SUCCEED;
@@ -216,6 +213,7 @@ done:
     Opens the HDF5 object referenced.
  USAGE
     hid_t H5R_dereference(ref)
+        H5D_t *dset;        IN: Dataset reference object is in.
         href_t *ref;        IN: Reference to open.
         
  RETURNS
@@ -230,7 +228,7 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 static hid_t
-H5R_dereference(href_t *ref)
+H5R_dereference(H5D_t *dset, href_t *ref)
 {
     H5D_t *dataset;             /* Pointer to dataset to open */
     H5G_entry_t ent;            /* Symbol table entry */
@@ -240,6 +238,7 @@ H5R_dereference(href_t *ref)
 
     assert(ref);
 
+printf("%s: ref->oid=%ld-%ld\n",FUNC,(long)ref->oid[0],ref->oid[1]);
     /*
      * Switch on object type, when we implement that feature, always try to
      *  open a dataset for now
@@ -252,9 +251,9 @@ H5R_dereference(href_t *ref)
 
     /* Initialize the symbol table entry */
     HDmemset(&ent,0,sizeof(H5G_entry_t));
-    HDmemcpy(&(ent.header),ref->objno,sizeof(haddr_t));
+    HDmemcpy(&(ent.header),ref->oid,sizeof(haddr_t));
     ent.type=H5G_NOTHING_CACHED;
-    ent.file=ref->file;
+/* ent.file=ref->file; */
 
     /* Open the dataset object */
     if (H5D_open_oid(dataset, &ent) < 0) {
@@ -267,6 +266,7 @@ H5R_dereference(href_t *ref)
         HRETURN_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL,
 		      "can't register dataset");
     }
+printf("%s: ret_value=%ld\n",FUNC,(long)ret_value);
 
 done:
     FUNC_LEAVE(ret_value);
@@ -280,6 +280,7 @@ done:
     Opens the HDF5 object referenced.
  USAGE
     hid_t H5Rdereference(ref)
+        hid_t dataset;      IN: Dataset reference object is in.
         href_t *ref;        IN: Reference to open.
         
  RETURNS
@@ -293,19 +294,22 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 hid_t
-H5Rdereference(href_t *ref)
+H5Rdereference(hid_t dataset, href_t *ref)
 {
+    H5D_t		   *dset = NULL;	/* dataset object */
     hid_t ret_value = FAIL;
 
     FUNC_ENTER(H5Rdereference, FAIL);
-    H5TRACE1("i","*r",ref);
+    H5TRACE2("i","i*r",dataset,ref);
 
     /* Check args */
+    if (H5I_DATASET != H5I_get_type(dataset) || NULL == (dset = H5I_object(dataset)))
+        HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset");
     if(ref==NULL)
         HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer");
 
     /* Create reference */
-    if ((ret_value=H5R_dereference(ref))<0)
+    if ((ret_value=H5R_dereference(dset, ref))<0)
         HGOTO_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable dereference object");
 
 done:
@@ -394,80 +398,3 @@ done:
     FUNC_LEAVE(ret_value);
 }   /* end H5Rget_space() */
 
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_get_type
- PURPOSE
-    Retrieves the type of a reference.
- USAGE
-    H5R_type_t H5R_get_type(ref)
-        href_t *ref;        IN: Reference to open.
-        
- RETURNS
-    Reference type on success, <0 on failure
- DESCRIPTION
-    Given a reference to some object, returns the type of reference.  See
-    list of valid H5R_type_t in H5Rpublic.h
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static H5R_type_t
-H5R_get_type(href_t *ref)
-{
-    H5R_type_t ret_value = H5R_BADTYPE;
-
-    FUNC_ENTER(H5R_get_type, H5R_BADTYPE);
-
-    assert(ref);
-
-    ret_value=ref->type;
-
-#ifdef LATER
-done:
-#endif /* LATER */
-    FUNC_LEAVE(ret_value);
-}   /* end H5R_get_type() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5Rget_type
- PURPOSE
-    Retrieves the type of a reference.
- USAGE
-    H5R_type_t H5Rget_space(ref)
-        href_t *ref;        IN: Reference to open.
-        
- RETURNS
-    Valid reference type on success, <0 on failure
- DESCRIPTION
-    Given a reference to some object, returns the type of reference.  See
-    list of valid H5R_type_t in H5Rpublic.h
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-H5R_type_t
-H5Rget_type(href_t *ref)
-{
-    H5R_type_t ret_value = H5R_BADTYPE;
-
-    FUNC_ENTER(H5Rget_type, FAIL);
-    H5TRACE1("Rt","*r",ref);
-
-    /* Check args */
-    if(ref==NULL)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer");
-
-    /* Create reference */
-    if ((ret_value=H5R_get_type(ref))<0)
-        HGOTO_ERROR (H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to check reference type");
-
-done:
-    FUNC_LEAVE(ret_value);
-}   /* end H5Rget_type() */
-
diff --git a/src/H5Rpublic.h b/src/H5Rpublic.h
index 121a853..4882444 100644
--- a/src/H5Rpublic.h
+++ b/src/H5Rpublic.h
@@ -33,17 +33,9 @@ typedef enum {
 
 /* Reference structure for user's code */
 typedef struct {
-    H5R_type_t  type;           /* Type of reference information in union */
-    unsigned long objno[2];     /* OID of object referenced */
-    struct H5F_t *file;         /* Pointer to the file the reference is in */
-    union {     /* union to hold structs */
-        struct {
-        } obj;                  /* Object reference structure */
-        struct {
-        } dreg;                 /* Dataset Region reference structure */
-        struct {
-        } intrl;                /* Internal reference structure */
-    }u;
+    unsigned long oid[2];       /* OID of object referenced */
+    unsigned long region[2];    /* heap ID of region in object */
+    unsigned long file[2];      /* heap ID of external filename */
 } href_t;
 
 /* Publicly visible datastructures */
@@ -55,9 +47,8 @@ extern "C" {
 /* Functions in H5R.c */
 herr_t H5Rcreate(href_t *ref, hid_t loc_id, const char *name,
         H5R_type_t ref_type, hid_t space_id);
-hid_t H5Rdereference(href_t *ref);
+hid_t H5Rdereference(hid_t dataset, href_t *ref);
 hid_t H5Rget_space(href_t *ref);
-H5R_type_t H5Rget_type(href_t *ref);
 
 #ifdef __cplusplus
 }
diff --git a/src/H5T.c b/src/H5T.c
index cb72c8c..34b19a1 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -59,6 +59,7 @@ hid_t H5T_STD_B32BE_g = FAIL;
 hid_t H5T_STD_B32LE_g = FAIL;
 hid_t H5T_STD_B64BE_g = FAIL;
 hid_t H5T_STD_B64LE_g = FAIL;
+hid_t H5T_STD_PTR_OBJ_g = FAIL;
 
 hid_t H5T_UNIX_D32BE_g = FAIL;
 hid_t H5T_UNIX_D32LE_g = FAIL;
@@ -91,7 +92,6 @@ hid_t H5T_NATIVE_HSIZE_g = FAIL;
 hid_t H5T_NATIVE_HSSIZE_g = FAIL;
 hid_t H5T_NATIVE_HERR_g = FAIL;
 hid_t H5T_NATIVE_HBOOL_g = FAIL;
-hid_t H5T_NATIVE_PTR_OBJ_g = FAIL;
 
 /* The path database */
 static intn H5T_npath_g = 0;			/*num paths defined	*/
@@ -221,9 +221,11 @@ H5T_init_interface(void)
     dt->u.atomic.offset = 0;
 
     /* Object pointer (i.e. object header address in file) */
-    dt = H5I_object (H5T_NATIVE_PTR_OBJ_g = H5Tcopy (H5T_NATIVE_INT_g));
+    dt = H5I_object (H5T_STD_PTR_OBJ_g = H5Tcopy (H5T_NATIVE_INT_g));
+    dt->type = H5T_POINTER;
     dt->state = H5T_STATE_IMMUTABLE;
     dt->size = sizeof(haddr_t);
+    dt->u.atomic.u.r.rtype = H5R_OBJECT;
     dt->u.atomic.prec = 8*dt->size;
     dt->u.atomic.offset = 0;
 
@@ -4116,7 +4118,7 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2)
     intn	i, j, tmp;
     hbool_t	swapped;
 
-    FUNC_ENTER(H5T_equal, 0);
+    FUNC_ENTER(H5T_cmp, 0);
 
     /* the easy case */
     if (dt1 == dt2) HGOTO_DONE(0);
@@ -4330,6 +4332,20 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2)
 	    /*void */
 	    break;
 
+	case H5T_POINTER:
+        if (dt1->u.atomic.u.r.rtype < dt2->u.atomic.u.r.rtype) HGOTO_DONE(-1);
+        if (dt1->u.atomic.u.r.rtype > dt2->u.atomic.u.r.rtype) HGOTO_DONE(1);
+
+        switch(dt1->u.atomic.u.r.rtype) {
+            case H5R_OBJECT:
+                /*void */
+                break;
+
+            default:
+                assert("not implemented yet" && 0);
+        } /* end switch */
+	    break;
+
 	default:
 	    assert("not implemented yet" && 0);
 	}
@@ -4378,23 +4394,27 @@ H5T_find(const H5T_t *src, const H5T_t *dst, H5T_bkg_t need_bkg,
 
     FUNC_ENTER(H5T_find, NULL);
 
+printf("%s: check 1.0\n",FUNC);
     if (!noop_cdata.stats &&
 	NULL==(noop_cdata.stats = H5MM_calloc (sizeof(H5T_stats_t)))) {
 	HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
 		       "memory allocation failed");
     }
 
+printf("%s: check 2.0, src->type=%d, dst->type=%d\n",FUNC,(int)src->type,(int)dst->type);
     /* No-op case */
     if (need_bkg<H5T_BKG_YES && 0==H5T_cmp(src, dst)) {
 	*pcdata = &noop_cdata;
 	HRETURN(H5T_conv_noop);
     }
     
+printf("%s: check 3.0\n",FUNC);
     /* Find it */
     if (NULL == (path = H5T_path_find(NULL, src, dst, TRUE, NULL))) {
 	HRETURN_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL,
 		      "unable to create conversion path");
     }
+printf("%s: path=%p\n",FUNC,path);
 
     if ((ret_value=path->func)) {
 	*pcdata = &(path->cdata);
@@ -4448,114 +4468,119 @@ H5T_path_find(const char *name, const H5T_t *src, const H5T_t *dst,
 
     /* Binary search */
     while (lt < rt) {
-	md = (lt + rt) / 2;
-	assert (H5T_path_g[md]);
+        md = (lt + rt) / 2;
+        assert (H5T_path_g[md]);
 
-	cmp = H5T_cmp(src, H5T_path_g[md]->src);
-	if (0 == cmp) cmp = H5T_cmp(dst, H5T_path_g[md]->dst);
+        cmp = H5T_cmp(src, H5T_path_g[md]->src);
+        if (0 == cmp) cmp = H5T_cmp(dst, H5T_path_g[md]->dst);
 
-	if (cmp < 0) {
-	    rt = md;
-	} else if (cmp > 0) {
-	    lt = md + 1;
-	} else {
-	    HRETURN(H5T_path_g[md]);
-	}
+        if (cmp < 0) {
+            rt = md;
+        } else if (cmp > 0) {
+            lt = md + 1;
+        } else {
+            HRETURN(H5T_path_g[md]);
+        }
     }
+printf("%s: check 2.0, create=%d, md=%d\n",FUNC,(int)create,md);
 
     /* Insert */
     if (create) {
-	if (H5T_npath_g >= H5T_apath_g) {
-	    size_t na = MAX(64, 2 * H5T_apath_g);
-	    H5T_path_t **x = H5MM_realloc (H5T_path_g,
-					   na*sizeof(H5T_path_t*));
-	    if (!x) {
-		HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
-			       "memory allocation failed");
-	    }
-	    H5T_apath_g = (intn)na;
-	    H5T_path_g = x;
-	}
-	if (cmp > 0) md++;
-
-	/* make room */
-	HDmemmove(H5T_path_g + md + 1, H5T_path_g + md,
-		  (H5T_npath_g - md) * sizeof(H5T_path_t*));
-	H5T_npath_g++;
-
-	/* insert */
-	if (NULL==(path=H5T_path_g[md]=H5MM_calloc (sizeof(H5T_path_t)))) {
-	    HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
-			   "memory allocation failed");
-	}
-	path->src = H5T_copy(src, H5T_COPY_ALL);
-	path->dst = H5T_copy(dst, H5T_COPY_ALL);
-
-	/* Associate a function with the path if possible */
-	if (func) {
-	    HDstrncpy (path->name, name, H5T_NAMELEN);
-	    path->name[H5T_NAMELEN-1] = '\0';
-	    path->func = func;
-	    path->is_hard = TRUE;
-	    path->cdata.command = H5T_CONV_INIT;
-	    if (NULL==(path->cdata.stats=H5MM_calloc(sizeof(H5T_stats_t)))) {
-		HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
-			       "memory allocation failed");
-	    }
-	    if ((src_id=H5I_register(H5I_DATATYPE,
-				     H5T_copy(path->src, H5T_COPY_ALL))) < 0 ||
-		(dst_id=H5I_register(H5I_DATATYPE,
-				     H5T_copy(path->dst, H5T_COPY_ALL))) < 0) {
-		HRETURN_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL,
-			      "unable to register conv types for query");
-	    }
-	    if ((func)(src_id, dst_id, &(path->cdata), 0, NULL, NULL)<0) {
+        if (H5T_npath_g >= H5T_apath_g) {
+            size_t na = MAX(64, 2 * H5T_apath_g);
+            H5T_path_t **x = H5MM_realloc (H5T_path_g,
+                           na*sizeof(H5T_path_t*));
+            if (!x) {
+            HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
+                       "memory allocation failed");
+            }
+            H5T_apath_g = (intn)na;
+            H5T_path_g = x;
+        }
+        if (cmp > 0) md++;
+
+        /* make room */
+        HDmemmove(H5T_path_g + md + 1, H5T_path_g + md,
+              (H5T_npath_g - md) * sizeof(H5T_path_t*));
+        H5T_npath_g++;
+
+        /* insert */
+        if (NULL==(path=H5T_path_g[md]=H5MM_calloc (sizeof(H5T_path_t)))) {
+            HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
+                   "memory allocation failed");
+        }
+printf("%s: check 3.0, src=%p, dst=%p\n",FUNC,src,dst);
+printf("%s: check 3.0, src->type=%d, dst->type=%d\n",FUNC,(int)src->type,(int)dst->type);
+        path->src = H5T_copy(src, H5T_COPY_ALL);
+        path->dst = H5T_copy(dst, H5T_COPY_ALL);
+
+printf("%s: check 3.5, func=%p, name=%s\n",FUNC,func,(name!=NULL ? name : "NULL"));
+        /* Associate a function with the path if possible */
+        if (func) {
+            HDstrncpy (path->name, name, H5T_NAMELEN);
+            path->name[H5T_NAMELEN-1] = '\0';
+            path->func = func;
+            path->is_hard = TRUE;
+            path->cdata.command = H5T_CONV_INIT;
+            if (NULL==(path->cdata.stats=H5MM_calloc(sizeof(H5T_stats_t)))) {
+            HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
+                       "memory allocation failed");
+            }
+            if ((src_id=H5I_register(H5I_DATATYPE,
+                         H5T_copy(path->src, H5T_COPY_ALL))) < 0 ||
+            (dst_id=H5I_register(H5I_DATATYPE,
+                         H5T_copy(path->dst, H5T_COPY_ALL))) < 0) {
+            HRETURN_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL,
+                      "unable to register conv types for query");
+            }
+            if ((func)(src_id, dst_id, &(path->cdata), 0, NULL, NULL)<0) {
 #ifdef H5T_DEBUG
-		if (H5DEBUG(T)) {
-		    fprintf (H5DEBUG(T), "H5T: conversion function init "
-			     "failed\n");
-		}
+            if (H5DEBUG(T)) {
+                fprintf (H5DEBUG(T), "H5T: conversion function init "
+                     "failed\n");
+            }
 #endif
-		H5E_clear(); /*ignore the failure*/
-	    }
-	    H5I_dec_ref(src_id);
-	    H5I_dec_ref(dst_id);
-	} else {
-	    /* Locate a soft function */
-	    for (i=H5T_nsoft_g-1; i>=0 && !path->func; --i) {
-		if (src->type!=H5T_soft_g[i].src ||
-		    dst->type!=H5T_soft_g[i].dst) {
-		    continue;
-		}
-		if ((src_id=H5I_register(H5I_DATATYPE,
-					 H5T_copy(path->src,
-						  H5T_COPY_ALL))) < 0 ||
-		    (dst_id=H5I_register(H5I_DATATYPE,
-					 H5T_copy(path->dst,
-						  H5T_COPY_ALL))) < 0) {
-		    HRETURN_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL,
-				  "unable to register conv types for query");
-		}
-		path->cdata.command = H5T_CONV_INIT;
-		path->cdata.stats = H5MM_calloc (sizeof(H5T_stats_t));
-		if (NULL==path->cdata.stats) {
-		    HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
-				   "memory allocation failed");
-		}
-		if ((H5T_soft_g[i].func) (src_id, dst_id, &(path->cdata),
-					  H5T_CONV_INIT, NULL, NULL) < 0) {
-		    H5MM_xfree(path->cdata.stats);
-		    HDmemset (&(path->cdata), 0, sizeof(H5T_cdata_t));
-		    H5E_clear(); /*ignore the error*/
-		} else {
-		    HDstrcpy (path->name, H5T_soft_g[i].name);
-		    path->func = H5T_soft_g[i].func;
-		}
-		H5I_dec_ref(src_id);
-		H5I_dec_ref(dst_id);
-	    }
-	}
-    }
+            H5E_clear(); /*ignore the failure*/
+            }
+            H5I_dec_ref(src_id);
+            H5I_dec_ref(dst_id);
+        } else {
+            /* Locate a soft function */
+            for (i=H5T_nsoft_g-1; i>=0 && !path->func; --i) {
+            if (src->type!=H5T_soft_g[i].src ||
+                dst->type!=H5T_soft_g[i].dst) {
+                continue;
+            }
+            if ((src_id=H5I_register(H5I_DATATYPE,
+                         H5T_copy(path->src,
+                              H5T_COPY_ALL))) < 0 ||
+                (dst_id=H5I_register(H5I_DATATYPE,
+                         H5T_copy(path->dst,
+                              H5T_COPY_ALL))) < 0) {
+                HRETURN_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL,
+                      "unable to register conv types for query");
+            }
+            path->cdata.command = H5T_CONV_INIT;
+            path->cdata.stats = H5MM_calloc (sizeof(H5T_stats_t));
+            if (NULL==path->cdata.stats) {
+                HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
+                       "memory allocation failed");
+            }
+            if ((H5T_soft_g[i].func) (src_id, dst_id, &(path->cdata),
+                          H5T_CONV_INIT, NULL, NULL) < 0) {
+                H5MM_xfree(path->cdata.stats);
+                HDmemset (&(path->cdata), 0, sizeof(H5T_cdata_t));
+                H5E_clear(); /*ignore the error*/
+            } else {
+                HDstrcpy (path->name, H5T_soft_g[i].name);
+                path->func = H5T_soft_g[i].func;
+            }
+            H5I_dec_ref(src_id);
+            H5I_dec_ref(dst_id);
+            }
+        }
+    }
+printf("%s: leaving path=%p\n",FUNC,path);
     FUNC_LEAVE(path);
 }
 
diff --git a/src/H5Tpkg.h b/src/H5Tpkg.h
index 8068069..4930bd5 100644
--- a/src/H5Tpkg.h
+++ b/src/H5Tpkg.h
@@ -24,6 +24,7 @@
 #endif
 
 #include <H5HGprivate.h>
+#include <H5Rprivate.h>
 #include <H5Tprivate.h>
 
 #define H5T_NAMELEN	10	/*length of debugging name buffer	     */
@@ -54,6 +55,10 @@ typedef struct H5T_atomic_t {
 	    H5T_cset_t	cset;	/*character set				     */
 	    H5T_str_t	pad;	/*space or null padding of extra bytes	     */
 	} s;
+
+	struct {
+	    H5R_type_t	rtype;	/* Type of reference stored */
+	} r;
     } u;
 } H5T_atomic_t;
 
diff --git a/src/H5Tpublic.h b/src/H5Tpublic.h
index 88b2433..a523e87 100644
--- a/src/H5Tpublic.h
+++ b/src/H5Tpublic.h
@@ -209,6 +209,7 @@ extern hid_t H5T_IEEE_F64LE_g;
 #define H5T_STD_B32LE		(H5open(), H5T_STD_B32LE_g)
 #define H5T_STD_B64BE		(H5open(), H5T_STD_B64BE_g)
 #define H5T_STD_B64LE		(H5open(), H5T_STD_B64LE_g)
+#define H5T_STD_PTR_OBJ	    (H5open(), H5T_STD_PTR_OBJ_g)
 extern hid_t H5T_STD_I8BE_g;
 extern hid_t H5T_STD_I8LE_g;
 extern hid_t H5T_STD_I16BE_g;
@@ -233,6 +234,7 @@ extern hid_t H5T_STD_B32BE_g;
 extern hid_t H5T_STD_B32LE_g;
 extern hid_t H5T_STD_B64BE_g;
 extern hid_t H5T_STD_B64LE_g;
+extern hid_t H5T_STD_PTR_OBJ_g;
 
 /*
  * Types which are particular to Unix.
@@ -347,7 +349,6 @@ extern hid_t H5T_FORTRAN_S1_g;
 #define H5T_NATIVE_HSSIZE	(H5open(), H5T_NATIVE_HSSIZE_g)
 #define H5T_NATIVE_HERR		(H5open(), H5T_NATIVE_HERR_g)
 #define H5T_NATIVE_HBOOL	(H5open(), H5T_NATIVE_HBOOL_g)
-#define H5T_NATIVE_PTR_OBJ	(H5open(), H5T_NATIVE_PTR_OBJ_g)
 extern hid_t H5T_NATIVE_CHAR_g;
 extern hid_t H5T_NATIVE_UCHAR_g;
 extern hid_t H5T_NATIVE_SHORT_g;
@@ -370,7 +371,6 @@ extern hid_t H5T_NATIVE_HSIZE_g;
 extern hid_t H5T_NATIVE_HSSIZE_g;
 extern hid_t H5T_NATIVE_HERR_g;
 extern hid_t H5T_NATIVE_HBOOL_g;
-extern hid_t H5T_NATIVE_PTR_OBJ_g;
    
 /* Operations defined on all data types */
 hid_t H5Topen (hid_t loc_id, const char *name);