Split H5L.c internal code to H5Lint.c (#691)

* Committing clang-format changes

* Splits internal parts of H5L.c to H5Lint.c

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

5 files changed, 2249 insertions, 2171 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 97384f0..555fb98 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -398,6 +398,7 @@ set (H5L_SOURCES
     ${HDF5_SRC_DIR}/H5L.c
     ${HDF5_SRC_DIR}/H5Ldeprec.c
     ${HDF5_SRC_DIR}/H5Lexternal.c
+    ${HDF5_SRC_DIR}/H5Lint.c
 )
 set (H5L_HDRS
     ${HDF5_SRC_DIR}/H5Lpublic.h
diff --git a/src/H5L.c b/src/H5L.c
index 982813b..d3c0fe3 100644
--- a/src/H5L.c
+++ b/src/H5L.c
@@ -21,17 +21,13 @@
 /* Headers */
 /***********/
 #include "H5private.h"          /* Generic Functions                        */
-#include "H5ACprivate.h"        /* Metadata cache                           */
 #include "H5CXprivate.h"        /* API Contexts                             */
-#include "H5Dprivate.h"         /* Datasets                                 */
 #include "H5Eprivate.h"         /* Error handling                           */
 #include "H5ESprivate.h"        /* Event Sets                               */
-#include "H5Fprivate.h"         /* File access                              */
 #include "H5Gprivate.h"         /* Groups                                   */
 #include "H5Iprivate.h"         /* IDs                                      */
 #include "H5Lpkg.h"             /* Links                                    */
 #include "H5MMprivate.h"        /* Memory management                        */
-#include "H5Oprivate.h"         /* File objects                             */
 #include "H5Pprivate.h"         /* Property lists                           */
 #include "H5VLprivate.h"        /* Virtual Object Layer                     */
 #include "H5VLnative_private.h" /* Native VOL                               */
@@ -40,96 +36,14 @@
 /* Local Macros */
 /****************/
 
-#define H5L_MIN_TABLE_SIZE 32 /* Minimum size of the user-defined link type table if it is allocated */
-
 /******************/
 /* Local Typedefs */
 /******************/
 
-/* User data for path traversal routine for getting link info by name */
-typedef struct {
-    H5L_info2_t *linfo; /* Buffer to return to user */
-} H5L_trav_gi_t;
-
-/* User data for path traversal callback to creating a link */
-typedef struct {
-    H5F_t *           file;      /* Pointer to the file */
-    H5P_genplist_t *  lc_plist;  /* Link creation property list */
-    H5G_name_t *      path;      /* Path to object being linked */
-    H5O_obj_create_t *ocrt_info; /* Pointer to object creation info */
-    H5O_link_t *      lnk;       /* Pointer to link information to insert */
-} H5L_trav_cr_t;
-
-/* User data for path traversal routine for moving and renaming a link */
-typedef struct {
-    const char *     dst_name;         /* Destination name for moving object */
-    H5T_cset_t       cset;             /* Char set for new name */
-    const H5G_loc_t *dst_loc;          /* Destination location for moving object */
-    unsigned         dst_target_flags; /* Target flags for destination object */
-    hbool_t          copy;             /* TRUE if this is a copy operation */
-    size_t           orig_nlinks; /* The original value for the # of soft / UD links that can be traversed */
-} H5L_trav_mv_t;
-
-/* User data for path traversal routine for moving and renaming an object */
-typedef struct {
-    H5F_t *     file; /* Pointer to the file */
-    H5O_link_t *lnk;  /* Pointer to link information to insert */
-    hbool_t     copy; /* TRUE if this is a copy operation */
-} H5L_trav_mv2_t;
-
-/* User data for path traversal routine for checking if a link exists */
-typedef struct {
-    /* Down */
-    char *sep; /* Pointer to next separator in the string */
-
-    /* Up */
-    hbool_t *exists; /* Whether the link exists or not */
-} H5L_trav_le_t;
-
-/* User data for path traversal routine for getting link value */
-typedef struct {
-    size_t size; /* Size of user buffer */
-    void * buf;  /* User buffer */
-} H5L_trav_gv_t;
-
 /********************/
 /* Local Prototypes */
 /********************/
 
-static int    H5L__find_class_idx(H5L_type_t id);
-static herr_t H5L__link_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                           H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__create_real(const H5G_loc_t *link_loc, const char *link_name, H5G_name_t *obj_path,
-                               H5F_t *obj_file, H5O_link_t *lnk, H5O_obj_create_t *ocrt_info, hid_t lcpl_id);
-static herr_t H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size);
-static herr_t H5L__get_val_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                              H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__get_val_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                     H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                     H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__delete_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                             H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__delete_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                    H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                    H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__move_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                           H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__move_dest_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__exists_final_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                   H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                   H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__exists_inter_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                   H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                   H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__get_info_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                               H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__get_info_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                      H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                      H5G_own_loc_t *own_loc /*out*/);
-static herr_t H5L__get_name_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                                      H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                                      H5G_own_loc_t *own_loc /*out*/);
 static herr_t H5L__create_soft_api_common(const char *link_target, hid_t link_loc_id, const char *link_name,
                                           hid_t lcpl_id, hid_t lapl_id, void **token_ptr,
                                           H5VL_object_t **_vol_obj_ptr);
@@ -151,9 +65,6 @@ static herr_t H5L__iterate_api_common(hid_t group_id, H5_index_t idx_type, H5_it
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
 /*****************************/
 /* Library Private Variables */
 /*****************************/
@@ -162,99 +73,6 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Local Variables */
 /*******************/
 
-/* Information about user-defined links */
-static size_t       H5L_table_alloc_g = 0;
-static size_t       H5L_table_used_g  = 0;
-static H5L_class_t *H5L_table_g       = NULL;
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_init
- *
- * Purpose:	Initialize the interface from some other package.
- *
- * Return:	Success:	non-negative
- *
- *		Failure:	negative
- *
- * Programmer:	James Laird
- *              Thursday, July 13, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_init(void)
-{
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-    /* FUNC_ENTER() does all the work */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_init() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__init_package
- *
- * Purpose:	Initialize information specific to H5L interface.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Tuesday, January 24, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__init_package(void)
-{
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Initialize user-defined link classes */
-    if (H5L_register_external() < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "unable to register external link class")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_init_package() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_term_package
- *
- * Purpose:	Terminate any resources allocated in H5L__init_package.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Tuesday, January 24, 2006
- *
- *-------------------------------------------------------------------------
- */
-int
-H5L_term_package(void)
-{
-    int n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if (H5_PKG_INIT_VAR) {
-        /* Free the table of link types */
-        if (H5L_table_g) {
-            H5L_table_g      = (H5L_class_t *)H5MM_xfree(H5L_table_g);
-            H5L_table_used_g = H5L_table_alloc_g = 0;
-            n++;
-        } /* end if */
-
-        /* Mark the interface as uninitialized */
-        if (0 == n)
-            H5_PKG_INIT_VAR = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* H5L_term_package() */
-
 /*-------------------------------------------------------------------------
  * Function:    H5Lmove
  *
@@ -1603,8 +1421,8 @@ done:
 htri_t
 H5Lis_registered(H5L_type_t id)
 {
-    size_t i;                 /* Local index variable */
-    htri_t ret_value = FALSE; /* Return value */
+    hbool_t is_registered = FALSE;
+    htri_t  ret_value     = FALSE; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("t", "Ll", id);
@@ -1614,11 +1432,10 @@ H5Lis_registered(H5L_type_t id)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid link type id number")
 
     /* Is the link class already registered? */
-    for (i = 0; i < H5L_table_used_g; i++)
-        if (H5L_table_g[i].id == id) {
-            ret_value = TRUE;
-            break;
-        } /* end if */
+    if (H5L_is_registered(id, &is_registered) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_BADTYPE, FAIL, "could not determine registration status of UD link type")
+
+    ret_value = is_registered ? TRUE : FALSE;
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2110,1984 +1927,3 @@ H5Lunpack_elink_val(const void *_ext_linkval, size_t link_size, unsigned *flags,
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Lunpack_elink_val() */
-
-/*
- *-------------------------------------------------------------------------
- *-------------------------------------------------------------------------
- *   N O   A P I   F U N C T I O N S   B E Y O N D   T H I S   P O I N T
- *-------------------------------------------------------------------------
- *-------------------------------------------------------------------------
- */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__find_class_idx
- *
- * Purpose:	Given a link class ID, return the offset in the global array
- *              that holds all the registered link classes.
- *
- * Return:	Success:	Non-negative index of entry in global
- *                              link class table.
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *              Monday, July 10, 2006
- *
- *-------------------------------------------------------------------------
- */
-static int
-H5L__find_class_idx(H5L_type_t id)
-{
-    size_t i;                /* Local index variable */
-    int    ret_value = FAIL; /* Return value */
-
-    FUNC_ENTER_STATIC_NOERR
-
-    for (i = 0; i < H5L_table_used_g; i++)
-        if (H5L_table_g[i].id == id)
-            HGOTO_DONE((int)i)
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__find_class_idx */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_find_class
- *
- * Purpose:	Given a link class ID return a pointer to a global struct that
- *		defines the link class.
- *
- * Return:	Success:	Ptr to entry in global link class table.
- *		Failure:	NULL
- *
- * Programmer:	James Laird
- *              Monday, July 10, 2006
- *
- *-------------------------------------------------------------------------
- */
-const H5L_class_t *
-H5L_find_class(H5L_type_t id)
-{
-    int          idx;              /* Filter index in global table */
-    H5L_class_t *ret_value = NULL; /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* Get the index in the global table */
-    if ((idx = H5L__find_class_idx(id)) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, NULL, "unable to find link class")
-
-    /* Set return value */
-    ret_value = H5L_table_g + idx;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_find_class */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_register
- *
- * Purpose:	Registers a class of user-defined links, or changes the
- *              behavior of an existing class.
- *
- *              See H5Lregister for full documentation.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Monday, July 10, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_register(const H5L_class_t *cls)
-{
-    size_t i;                   /* Local index variable */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(cls);
-    HDassert(cls->id >= 0 && cls->id <= H5L_TYPE_MAX);
-
-    /* Is the link type already registered? */
-    for (i = 0; i < H5L_table_used_g; i++)
-        if (H5L_table_g[i].id == cls->id)
-            break;
-
-    /* Filter not already registered */
-    if (i >= H5L_table_used_g) {
-        if (H5L_table_used_g >= H5L_table_alloc_g) {
-            size_t       n     = MAX(H5L_MIN_TABLE_SIZE, (2 * H5L_table_alloc_g));
-            H5L_class_t *table = (H5L_class_t *)H5MM_realloc(H5L_table_g, (n * sizeof(H5L_class_t)));
-            if (!table)
-                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend link type table")
-            H5L_table_g       = table;
-            H5L_table_alloc_g = n;
-        } /* end if */
-
-        /* Initialize */
-        i = H5L_table_used_g++;
-    } /* end if */
-
-    /* Copy link class info into table */
-    H5MM_memcpy(H5L_table_g + i, cls, sizeof(H5L_class_t));
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_register */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_unregister
- *
- * Purpose:	Unregisters a class of user-defined links.
- *
- *              See H5Lunregister for full documentation.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Monday, July 10, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_unregister(H5L_type_t id)
-{
-    size_t i;                   /* Local index variable */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(id >= 0 && id <= H5L_TYPE_MAX);
-
-    /* Is the filter already registered? */
-    for (i = 0; i < H5L_table_used_g; i++)
-        if (H5L_table_g[i].id == id)
-            break;
-
-    /* Fail if filter not found */
-    if (i >= H5L_table_used_g)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "link class is not registered")
-
-    /* Remove filter from table */
-    /* Don't worry about shrinking table size (for now) */
-    HDmemmove(&H5L_table_g[i], &H5L_table_g[i + 1], sizeof(H5L_class_t) * ((H5L_table_used_g - 1) - i));
-    H5L_table_used_g--;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_unregister() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_link
- *
- * Purpose:	Creates a link from OBJ_ID to CUR_NAME.  See H5Olink() for
- *		full documentation.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Tuesday, December 13, 2005
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_link(const H5G_loc_t *new_loc, const char *new_name, H5G_loc_t *obj_loc, hid_t lcpl_id)
-{
-    H5O_link_t lnk;                 /* Link to insert */
-    herr_t     ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(new_loc);
-    HDassert(obj_loc);
-    HDassert(new_name && *new_name);
-
-    /* The link callback will check that the object isn't being hard linked
-     * into a different file, so we don't need to do it here (there could be
-     * external links along the path).
-     */
-
-    /* Construct link information for eventual insertion */
-    lnk.type        = H5L_TYPE_HARD;
-    lnk.u.hard.addr = obj_loc->oloc->addr;
-
-    /* Create the link */
-    if (H5L__create_real(new_loc, new_name, obj_loc->path, obj_loc->oloc->file, &lnk, NULL, lcpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_link() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_link_object
- *
- * Purpose:	Creates a new object and a link to it.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, April 9, 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_link_object(const H5G_loc_t *new_loc, const char *new_name, H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
-{
-    H5O_link_t lnk;                 /* Link to insert */
-    herr_t     ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(new_loc);
-    HDassert(new_name && *new_name);
-    HDassert(ocrt_info);
-
-    /* The link callback will check that the object isn't being hard linked
-     * into a different file, so we don't need to do it here (there could be
-     * external links along the path).
-     */
-
-    /* Construct link information for eventual insertion */
-    lnk.type = H5L_TYPE_HARD;
-
-    /* Create the link */
-    if (H5L__create_real(new_loc, new_name, NULL, NULL, &lnk, ocrt_info, lcpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_link_object() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__link_cb
- *
- * Purpose:	Callback for creating a link to an object.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, September 19, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__link_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
-             H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_cr_t *udata  = (H5L_trav_cr_t *)_udata; /* User data passed in */
-    H5G_t *        grp    = NULL;    /* H5G_t for this group, opened to pass to user callback */
-    hid_t          grp_id = FAIL;    /* Id for this group (passed to user callback */
-    H5G_loc_t      temp_loc;         /* For UD callback */
-    hbool_t temp_loc_init = FALSE;   /* Temporary location for UD callback (temp_loc) has been initialized */
-    hbool_t obj_created   = FALSE;   /* Whether an object was created (through a hard link) */
-    herr_t  ret_value     = SUCCEED; /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name in this group resolved to a valid location */
-    /* (which is not what we want) */
-    if (obj_loc != NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name already exists")
-
-    /* Check for crossing file boundaries with a new hard link */
-    if (udata->lnk->type == H5L_TYPE_HARD) {
-        /* Check for creating an object */
-        /* (only for hard links) */
-        if (udata->ocrt_info) {
-            H5G_loc_t new_loc; /* Group location for new object */
-
-            /* Create new object at this location */
-            if (NULL ==
-                (udata->ocrt_info->new_obj = H5O_obj_create(grp_loc->oloc->file, udata->ocrt_info->obj_type,
-                                                            udata->ocrt_info->crt_info, &new_loc)))
-                HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create object")
-
-            /* Set address for hard link */
-            udata->lnk->u.hard.addr = new_loc.oloc->addr;
-
-            /* Set object path to use for setting object name (below) */
-            udata->path = new_loc.path;
-
-            /* Indicate that an object was created */
-            obj_created = TRUE;
-        } /* end if */
-        else {
-            /* Check that both objects are in same file */
-            if (!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
-                HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "interfile hard links are not allowed")
-        } /* end else */
-    }     /* end if */
-
-    /* Set 'standard' aspects of link */
-    udata->lnk->corder =
-        0; /* Will be re-written during group insertion, if the group is tracking creation order */
-    udata->lnk->corder_valid = FALSE; /* Creation order not valid (yet) */
-
-    /* Check for non-default link creation properties */
-    if (udata->lc_plist) {
-        /* Get character encoding property */
-        if (H5CX_get_encoding(&udata->lnk->cset) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get 'character set' property")
-    } /* end if */
-    else
-        udata->lnk->cset = H5F_DEFAULT_CSET; /* Default character encoding for link */
-
-    /* Set the link's name correctly */
-    /* Casting away const OK -QAK */
-    udata->lnk->name = (char *)name;
-
-    /* Insert link into group */
-    if (H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE,
-                       udata->ocrt_info ? udata->ocrt_info->obj_type : H5O_TYPE_UNKNOWN,
-                       udata->ocrt_info ? udata->ocrt_info->crt_info : NULL) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link for object")
-
-    /* Set object's path if it has been passed in and is not set */
-    if (udata->path != NULL && udata->path->user_path_r == NULL)
-        if (H5G_name_set(grp_loc->path, udata->path, name) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "cannot set name")
-
-    /* If link is a user-defined link, trigger its creation callback if it has one */
-    if (udata->lnk->type >= H5L_TYPE_UD_MIN) {
-        const H5L_class_t *link_class; /* User-defined link class */
-
-        /* Get the link class for this type of link. */
-        if (NULL == (link_class = H5L_find_class(udata->lnk->type)))
-            HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "unable to get class of UD link")
-
-        if (link_class->create_func != NULL) {
-            H5O_loc_t  temp_oloc;
-            H5G_name_t temp_path;
-
-            /* Create a temporary location (or else H5G_open will do a shallow
-             * copy and wipe out grp_loc)
-             */
-            H5G_name_reset(&temp_path);
-            if (H5O_loc_copy_deep(&temp_oloc, grp_loc->oloc) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
-
-            temp_loc.oloc = &temp_oloc;
-            temp_loc.path = &temp_path;
-            temp_loc_init = TRUE;
-
-            /* Set up location for user-defined callback */
-            if (NULL == (grp = H5G_open(&temp_loc)))
-                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
-            if ((grp_id = H5VL_wrap_register(H5I_GROUP, grp, TRUE)) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register ID for group")
-
-            /* Make callback */
-            if ((link_class->create_func)(name, grp_id, udata->lnk->u.ud.udata, udata->lnk->u.ud.size,
-                                          H5P_DEFAULT) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "link creation callback failed")
-        } /* end if */
-    }     /* end if */
-
-done:
-    /* Check if an object was created */
-    if (obj_created) {
-        H5O_loc_t oloc; /* Object location for created object */
-
-        /* Set up object location */
-        HDmemset(&oloc, 0, sizeof(oloc));
-        oloc.file = grp_loc->oloc->file;
-        oloc.addr = udata->lnk->u.hard.addr;
-
-        /* Decrement refcount on new object's object header in memory */
-        if (H5O_dec_rc_by_loc(&oloc) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
-    } /* end if */
-
-    /* Close the location given to the user callback if it was created */
-    if (grp_id >= 0) {
-        if (H5I_dec_app_ref(grp_id) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close ID from UD callback")
-    } /* end if */
-    else if (grp != NULL) {
-        if (H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
-    } /* end if */
-    else if (temp_loc_init)
-        H5G_loc_free(&temp_loc);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__link_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__create_real
- *
- * Purpose:     Creates a link at a path location
- *
- *              lnk should have linkclass-specific information already
- *              set, but this function will take care of setting name.
- *
- *              obj_path can be NULL if the object's path doesn't need to
- *              be set, and obj_file can be NULL if the object is not a
- *              hard link.
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Quincey Koziol
- *              Monday, December  5, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__create_real(const H5G_loc_t *link_loc, const char *link_name, H5G_name_t *obj_path, H5F_t *obj_file,
-                 H5O_link_t *lnk, H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
-{
-    char *          norm_link_name = NULL;              /* Pointer to normalized link name */
-    unsigned        target_flags   = H5G_TARGET_NORMAL; /* Flags to pass to group traversal function */
-    H5P_genplist_t *lc_plist       = NULL;              /* Link creation property list */
-    H5L_trav_cr_t   udata;                              /* User data for callback */
-    herr_t          ret_value = SUCCEED;                /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check args */
-    HDassert(link_loc);
-    HDassert(link_name && *link_name);
-    HDassert(lnk);
-    HDassert(lnk->type >= H5L_TYPE_HARD && lnk->type <= H5L_TYPE_MAX);
-
-    /* Get normalized link name */
-    if ((norm_link_name = H5G_normalize(link_name)) == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
-
-    /* Check for flags present in creation property list */
-    if (lcpl_id != H5P_DEFAULT) {
-        unsigned crt_intmd_group;
-
-        /* Get link creation property list */
-        if (NULL == (lc_plist = (H5P_genplist_t *)H5I_object(lcpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-
-        /* Get intermediate group creation property */
-        if (H5CX_get_intermediate_group(&crt_intmd_group) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get 'create intermediate group' property")
-
-        if (crt_intmd_group > 0)
-            target_flags |= H5G_CRT_INTMD_GROUP;
-    } /* end if */
-
-    /* Set up user data
-     * FILE is used to make sure that hard links don't cross files, and
-     * should be NULL for other link types.
-     * LC_PLIST is a pointer to the link creation property list.
-     * PATH is a pointer to the path of the object being inserted if this is
-     * a hard link; this is used to set the paths to objects when they are
-     * created.  For other link types, this is NULL.
-     * OCRT_INFO is a pointer to the structure for object creation.
-     * LNK is the link struct passed into this function.  At this point all
-     * of its fields should be populated except for name, which is set when
-     * inserting it in the callback.
-     */
-    udata.file      = obj_file;
-    udata.lc_plist  = lc_plist;
-    udata.path      = obj_path;
-    udata.ocrt_info = ocrt_info;
-    udata.lnk       = lnk;
-
-    /* Traverse the destination path & create new link */
-    if (H5G_traverse(link_loc, link_name, target_flags, H5L__link_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINSERT, FAIL, "can't insert link")
-
-done:
-    /* Free the normalized path name */
-    if (norm_link_name)
-        H5MM_xfree(norm_link_name);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__create_real() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__create_hard
- *
- * Purpose:	Creates a hard link from NEW_NAME to CUR_NAME.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, April  6, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__create_hard(H5G_loc_t *cur_loc, const char *cur_name, const H5G_loc_t *link_loc, const char *link_name,
-                 hid_t lcpl_id)
-{
-    char *     norm_cur_name = NULL; /* Pointer to normalized current name */
-    H5F_t *    link_file     = NULL; /* Pointer to file to link to */
-    H5O_link_t lnk;                  /* Link to insert */
-    H5G_loc_t  obj_loc;              /* Location of object to link to */
-    H5G_name_t path;                 /* obj_loc's path*/
-    H5O_loc_t  oloc;                 /* obj_loc's oloc */
-    hbool_t    loc_valid = FALSE;
-    herr_t     ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check args */
-    HDassert(cur_loc);
-    HDassert(cur_name && *cur_name);
-    HDassert(link_loc);
-    HDassert(link_name && *link_name);
-
-    /* Get normalized copy of the current name */
-    if ((norm_cur_name = H5G_normalize(cur_name)) == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
-
-    /* Set up link data specific to hard links */
-    lnk.type = H5L_TYPE_HARD;
-
-    /* Get object location for object pointed to */
-    obj_loc.path = &path;
-    obj_loc.oloc = &oloc;
-    H5G_loc_reset(&obj_loc);
-    if (H5G_loc_find(cur_loc, norm_cur_name, &obj_loc) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "source object not found")
-    loc_valid = TRUE;
-
-    /* Construct link information for eventual insertion */
-    lnk.u.hard.addr = obj_loc.oloc->addr;
-
-    /* Set destination's file information */
-    link_file = obj_loc.oloc->file;
-
-    /* Create actual link to the object.  Pass in NULL for the path, since this
-     * function shouldn't change an object's user path. */
-    if (H5L__create_real(link_loc, link_name, NULL, link_file, &lnk, NULL, lcpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
-
-done:
-    /* Free the object header location */
-    if (loc_valid)
-        if (H5G_loc_free(&obj_loc) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to free location")
-
-    /* Free the normalized path name */
-    if (norm_cur_name)
-        H5MM_xfree(norm_cur_name);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__create_hard() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__create_soft
- *
- * Purpose:     Creates a soft link from LINK_NAME to TARGET_PATH.
- *
- * Return:      SUCCEED/FAIL
- *
- * Programmer:	Robb Matzke
- *              Monday, April  6, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__create_soft(const char *target_path, const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id)
-{
-    char *     norm_target = NULL;  /* Pointer to normalized current name */
-    H5O_link_t lnk;                 /* Link to insert */
-    herr_t     ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check args */
-    HDassert(link_loc);
-    HDassert(target_path && *target_path);
-    HDassert(link_name && *link_name);
-
-    /* Get normalized copy of the link target */
-    if ((norm_target = H5G_normalize(target_path)) == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
-
-    /* Set up link data specific to soft links */
-    lnk.type        = H5L_TYPE_SOFT;
-    lnk.u.soft.name = norm_target;
-
-    /* Create actual link to the object */
-    if (H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
-
-done:
-    /* Free the normalized target name */
-    if (norm_target)
-        H5MM_xfree(norm_target);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__create_soft() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__create_ud
- *
- * Purpose:	Creates a user-defined link. See H5Lcreate_ud for
- *              full documentation.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Friday, May 19, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__create_ud(const H5G_loc_t *link_loc, const char *link_name, const void *ud_data, size_t ud_data_size,
-               H5L_type_t type, hid_t lcpl_id)
-{
-    H5O_link_t lnk;                 /* Link to insert */
-    herr_t     ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check args */
-    HDassert(type >= H5L_TYPE_UD_MIN && type <= H5L_TYPE_MAX);
-    HDassert(link_loc);
-    HDassert(link_name && *link_name);
-    HDassert(ud_data_size == 0 || ud_data);
-
-    /* Initialize the link struct's pointer to its udata buffer */
-    lnk.u.ud.udata = NULL;
-
-    /* Make sure that this link class is registered */
-    if (H5L__find_class_idx(type) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "link class has not been registered with library")
-
-    /* Fill in UD link-specific information in the link struct*/
-    if (ud_data_size > 0) {
-        lnk.u.ud.udata = H5MM_malloc((size_t)ud_data_size);
-        H5MM_memcpy(lnk.u.ud.udata, ud_data, (size_t)ud_data_size);
-    } /* end if */
-    else
-        lnk.u.ud.udata = NULL;
-
-    lnk.u.ud.size = ud_data_size;
-    lnk.type      = type;
-
-    /* Create actual link to the object */
-    if (H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to register new name for object")
-
-done:
-    /* Free the link's udata buffer if it's been allocated */
-    H5MM_xfree(lnk.u.ud.udata);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__create_ud() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_val_real
- *
- * Purpose:	Retrieve link value from a link object
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 13 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size)
-{
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Sanity check */
-    HDassert(lnk);
-
-    /* Check for soft link */
-    if (H5L_TYPE_SOFT == lnk->type) {
-        /* Copy to output buffer */
-        if (size > 0 && buf) {
-            HDstrncpy((char *)buf, lnk->u.soft.name, size);
-            if (HDstrlen(lnk->u.soft.name) >= size)
-                ((char *)buf)[size - 1] = '\0';
-        } /* end if */
-    }     /* end if */
-    /* Check for user-defined link */
-    else if (lnk->type >= H5L_TYPE_UD_MIN) {
-        const H5L_class_t *link_class; /* User-defined link class */
-
-        /* Get the link class for this type of link.  It's okay if the class
-         * isn't registered, though--we just can't give any more information
-         * about it
-         */
-        link_class = H5L_find_class(lnk->type);
-
-        if (link_class != NULL && link_class->query_func != NULL) {
-            if ((link_class->query_func)(lnk->name, lnk->u.ud.udata, lnk->u.ud.size, buf, size) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "query callback returned failure")
-        } /* end if */
-        else if (buf && size > 0)
-            ((char *)buf)[0] = '\0';
-    } /* end if */
-    else
-        HGOTO_ERROR(H5E_LINK, H5E_BADTYPE, FAIL, "object is not a symbolic or user-defined link")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_val_real() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_val_cb
- *
- * Purpose:	Callback for retrieving link value or udata.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, September 20, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_val_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-                H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gv_t *udata     = (H5L_trav_gv_t *)_udata; /* User data passed in */
-    herr_t         ret_value = SUCCEED;                 /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name in this group resolved to a valid link */
-    if (lnk == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "'%s' doesn't exist", name)
-
-    /* Retrieve the value for the link */
-    if (H5L__get_val_real(lnk, udata->buf, udata->size) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
-
-done:
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_val_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_val
- *
- * Purpose:	Returns the value of a symbolic link or the udata for a
- *              user-defined link.
- *
- * Return:	Success:	Non-negative, with at most SIZE bytes of the
- *				link value copied into the BUF buffer.  If the
- *				link value is larger than SIZE characters
- *				counting the null terminator then the BUF
- *				result will not be null terminated.
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *              Monday, April 13, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__get_val(const H5G_loc_t *loc, const char *name, void *buf /*out*/, size_t size)
-{
-    H5L_trav_gv_t udata;               /* User data for callback */
-    herr_t        ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Sanity check */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Set up user data for retrieving information */
-    udata.size = size;
-    udata.buf  = buf;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L__get_val() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_val_by_idx_cb
- *
- * Purpose:	Callback for retrieving a link's value according to an
- *              index's order.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 13 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_val_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                       const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                       H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gvbi_t *udata = (H5L_trav_gvbi_t *)_udata; /* User data passed in */
-    H5O_link_t       fnd_lnk;                           /* Link within group */
-    hbool_t          lnk_copied = FALSE;                /* Whether the link was copied */
-    herr_t           ret_value  = SUCCEED;              /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name of the group resolved to a valid object */
-    if (obj_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
-
-    /* Query link */
-    if (H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
-    lnk_copied = TRUE;
-
-    /* Retrieve the value for the link */
-    if (H5L__get_val_real(&fnd_lnk, udata->buf, udata->size) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
-
-done:
-    /* Reset the link information, if we have a copy */
-    if (lnk_copied)
-        H5O_msg_reset(H5O_LINK_ID, &fnd_lnk);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_val_by_idx_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__get_val_by_idx
- *
- * Purpose:     Internal routine to query a link value according to the
- *              index within a group
- *
- * Return:      SUCCEED/FAIL
- *
- * Programmer:	Quincey Koziol
- *		December 27, 2017
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__get_val_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
-                    hsize_t n, void *buf /*out*/, size_t size)
-{
-    H5L_trav_gvbi_t udata;               /* User data for callback */
-    herr_t          ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check arguments */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Set up user data for retrieving information */
-    udata.idx_type = idx_type;
-    udata.order    = order;
-    udata.n        = n;
-    udata.buf      = buf;
-    udata.size     = size;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_by_idx_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info for index: %llu", (unsigned long long)n)
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_val_by_idx() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__delete_cb
- *
- * Purpose:	Callback for deleting a link.  This routine
- *              actually deletes the link
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, September 19, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__delete_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
-               H5G_loc_t H5_ATTR_UNUSED *obj_loc, void H5_ATTR_UNUSED *_udata /*in,out*/,
-               H5G_own_loc_t *own_loc /*out*/)
-{
-    herr_t ret_value = SUCCEED;
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the group resolved to a valid link */
-    if (grp_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
-
-    /* Check if the name in this group resolved to a valid link */
-    if (name == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
-
-    /* Check for non-existent (NULL) link.
-     * Note that this can also occur when attempting to remove '.'
-     */
-    if (lnk == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL,
-                    "callback link pointer is NULL (specified link may be '.' or not exist)")
-
-    /* Remove the link from the group */
-    if (H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, name) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to remove link from group")
-
-done:
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__delete_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__delete
- *
- * Purpose:	Delete a link from a group.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Thursday, September 17, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__delete(const H5G_loc_t *loc, const char *name)
-{
-    char * norm_name = NULL;    /* Pointer to normalized name */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Sanity check */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Get normalized copy of the name */
-    if ((norm_name = H5G_normalize(name)) == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
-
-    /* Set up user data for unlink operation */
-    if (H5G_traverse(loc, norm_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT, H5L__delete_cb,
-                     NULL) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTREMOVE, FAIL, "can't unlink object")
-
-done:
-    /* Free the normalized path name */
-    if (norm_name)
-        H5MM_xfree(norm_name);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__delete() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__delete_by_idx_cb
- *
- * Purpose:	Callback for removing a link according to an index's order.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 13 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__delete_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                      const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                      H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gvbi_t *udata     = (H5L_trav_gvbi_t *)_udata; /* User data passed in */
-    herr_t           ret_value = SUCCEED;                   /* Return value */
-
-    FUNC_ENTER_STATIC_TAG((obj_loc) ? (obj_loc->oloc->addr) : HADDR_UNDEF)
-
-    /* Check if the name of the group resolved to a valid object */
-    if (obj_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
-
-    /* Delete link */
-    if (H5G_obj_remove_by_idx(obj_loc->oloc, obj_loc->path->full_path_r, udata->idx_type, udata->order,
-                              udata->n) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
-
-done:
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value)
-} /* end H5L__delete_by_idx_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__delete_by_idx
- *
- * Purpose:     Internal routine to delete a link according to its index
- *              within a group.
- *
- * Return:      SUCCEED/FAIL
- *
- * Programmer:	Quincey Koziol
- *		December 27, 2017
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__delete_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
-                   hsize_t n)
-{
-    H5L_trav_rmbi_t udata;               /* User data for callback */
-    herr_t          ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Sanity check */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Set up user data for unlink operation */
-    udata.idx_type = idx_type;
-    udata.order    = order;
-    udata.n        = n;
-
-    /* Traverse the group hierarchy to remove the link */
-    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT,
-                     H5L__delete_by_idx_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "link doesn't exist")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__delete_by_idx() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__move_dest_cb
- *
- * Purpose:	Second callback for moving and renaming an object.  This routine
- *              inserts a new link into the group returned by the traversal.
- *              It is called by H5L__move_cb.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Monday, April 3, 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__move_dest_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
-                  H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_mv2_t *udata  = (H5L_trav_mv2_t *)_udata; /* User data passed in */
-    H5G_t *         grp    = NULL; /* H5G_t for this group, opened to pass to user callback */
-    hid_t           grp_id = FAIL; /* ID for this group (passed to user callback */
-    H5G_loc_t       temp_loc;      /* For UD callback */
-    hbool_t         temp_loc_init = FALSE;
-    herr_t          ret_value     = SUCCEED; /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Make sure an object with this name doesn't already exist */
-    if (obj_loc != NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "an object with that name already exists")
-
-    /* Check for crossing file boundaries with a new hard link */
-    if (udata->lnk->type == H5L_TYPE_HARD)
-        /* Check that both objects are in same file */
-        if (!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "moving a link across files is not allowed")
-
-    /* Give the object its new name */
-    /* Casting away const okay -JML */
-    HDassert(udata->lnk->name == NULL);
-    udata->lnk->name = (char *)name;
-
-    /* Insert the link into the group */
-    if (H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE, H5O_TYPE_UNKNOWN, NULL) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
-
-    /* If the link was a user-defined link, call its move callback if it has one */
-    if (udata->lnk->type >= H5L_TYPE_UD_MIN) {
-        const H5L_class_t *link_class; /* User-defined link class */
-
-        /* Get the link class for this type of link. */
-        if (NULL == (link_class = H5L_find_class(udata->lnk->type)))
-            HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "link class is not registered")
-
-        if ((!udata->copy && link_class->move_func) || (udata->copy && link_class->copy_func)) {
-            H5O_loc_t  temp_oloc;
-            H5G_name_t temp_path;
-
-            /* Create a temporary location (or else H5G_open will do a shallow
-             * copy and wipe out grp_loc)
-             */
-            H5G_name_reset(&temp_path);
-            if (H5O_loc_copy_deep(&temp_oloc, grp_loc->oloc) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
-
-            temp_loc.oloc = &temp_oloc;
-            temp_loc.path = &temp_path;
-            temp_loc_init = TRUE;
-
-            /* Set up location for user-defined callback */
-            if (NULL == (grp = H5G_open(&temp_loc)))
-                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
-            if ((grp_id = H5VL_wrap_register(H5I_GROUP, grp, TRUE)) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register group ID")
-
-            if (udata->copy) {
-                if ((link_class->copy_func)(udata->lnk->name, grp_id, udata->lnk->u.ud.udata,
-                                            udata->lnk->u.ud.size) < 0)
-                    HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "UD copy callback returned error")
-            } /* end if */
-            else {
-                if ((link_class->move_func)(udata->lnk->name, grp_id, udata->lnk->u.ud.udata,
-                                            udata->lnk->u.ud.size) < 0)
-                    HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "UD move callback returned error")
-            } /* end else */
-        }     /* end if */
-    }         /* end if */
-
-done:
-    /* Close the location given to the user callback if it was created */
-    if (grp_id >= 0) {
-        if (H5I_dec_app_ref(grp_id) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close ID from UD callback")
-    } /* end if */
-    else if (grp != NULL) {
-        if (H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
-    } /* end if */
-    else if (temp_loc_init)
-        H5G_loc_free(&temp_loc);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    /* Reset the "name" field in udata->lnk because it is owned by traverse()
-     * and must not be manipulated after traverse closes */
-    udata->lnk->name = NULL;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__move_dest_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__move_cb
- *
- * Purpose:	Callback for moving and renaming an object.  This routine
- *              replaces the names of open objects with the moved object
- *              in the path
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Friday, April 3, 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__move_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk, H5G_loc_t *obj_loc,
-             void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_mv_t *udata = (H5L_trav_mv_t *)_udata; /* User data passed in */
-    H5L_trav_mv2_t udata_out;                       /* User data for H5L__move_dest_cb traversal */
-    char *         orig_name   = NULL;              /* The name of the link in this group */
-    hbool_t        link_copied = FALSE;             /* Has udata_out.lnk been allocated? */
-    herr_t         ret_value   = SUCCEED;           /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name in this group resolved to a valid link */
-    if (obj_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
-
-    /* Check for operations on '.' */
-    if (lnk == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "the name of a link must be supplied to move or copy")
-
-    /* Set up user data for move_dest_cb */
-    if (NULL == (udata_out.lnk = (H5O_link_t *)H5O_msg_copy(H5O_LINK_ID, lnk, NULL)))
-        HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy link to be moved")
-
-    /* In this special case, the link's name is going to be replaced at its
-     * destination, so we should free it here.
-     */
-    udata_out.lnk->name = (char *)H5MM_xfree(udata_out.lnk->name);
-    link_copied         = TRUE;
-
-    udata_out.lnk->cset = udata->cset;
-    udata_out.file      = grp_loc->oloc->file;
-    udata_out.copy      = udata->copy;
-
-    /* Keep a copy of link's name (it's "owned" by the H5G_traverse() routine) */
-    orig_name = H5MM_xstrdup(name);
-
-    /* Reset the # of soft / UD links that can be traversed, so that the second
-     * (destination) traversal has the correct value
-     */
-    if (H5CX_set_nlinks(udata->orig_nlinks) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't reset # of soft / UD links to traverse")
-
-    /* Insert the link into its new location */
-    if (H5G_traverse(udata->dst_loc, udata->dst_name, udata->dst_target_flags, H5L__move_dest_cb,
-                     &udata_out) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to follow symbolic link")
-
-    /* If this is a move and not a copy operation, change the object's name and remove the old link */
-    if (!udata->copy) {
-        H5RS_str_t *dst_name_r; /* Ref-counted version of dest name */
-
-        /* Make certain that the destination name is a full (not relative) path */
-        if (*(udata->dst_name) != '/') {
-            HDassert(udata->dst_loc->path->full_path_r);
-
-            /* Create reference counted string for full dst path */
-            if ((dst_name_r = H5G_build_fullpath_refstr_str(udata->dst_loc->path->full_path_r,
-                                                            udata->dst_name)) == NULL)
-                HGOTO_ERROR(H5E_LINK, H5E_PATH, FAIL, "can't build destination path name")
-        } /* end if */
-        else
-            dst_name_r = H5RS_wrap(udata->dst_name);
-        HDassert(dst_name_r);
-
-        /* Fix names up */
-        if (H5G_name_replace(lnk, H5G_NAME_MOVE, obj_loc->oloc->file, obj_loc->path->full_path_r,
-                             udata->dst_loc->oloc->file, dst_name_r) < 0) {
-            H5RS_decr(dst_name_r);
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to replace name")
-        } /* end if */
-
-        /* Remove the old link */
-        if (H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, orig_name) < 0) {
-            H5RS_decr(dst_name_r);
-            HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to remove old name")
-        } /* end if */
-
-        H5RS_decr(dst_name_r);
-    } /* end if */
-
-done:
-    /* Cleanup */
-    if (orig_name)
-        H5MM_xfree(orig_name);
-
-    /* If udata_out.lnk was copied, free any memory allocated
-     * In this special case, the H5L__move_dest_cb callback resets the name
-     * so H5O_msg_free shouldn't try to free it
-     */
-    if (link_copied)
-        H5O_msg_free(H5O_LINK_ID, udata_out.lnk);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__move_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__move
- *
- * Purpose:	Atomically move or copy a link.
- *
- *              Creates a copy of a link in a new destination with a new name.
- *              SRC_LOC and SRC_NAME together define the link's original
- *              location, while DST_LOC and DST_NAME together define its
- *              final location.
- *
- *              If copy_flag is FALSE, the original link is removed
- *              (effectively moving the link).
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Monday, May 1, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__move(const H5G_loc_t *src_loc, const char *src_name, const H5G_loc_t *dst_loc, const char *dst_name,
-          hbool_t copy_flag, hid_t lcpl_id)
-{
-    unsigned        dst_target_flags = H5G_TARGET_NORMAL;
-    H5T_cset_t      char_encoding    = H5F_DEFAULT_CSET; /* Character encoding for link */
-    H5P_genplist_t *lc_plist;                            /* Link creation property list */
-    H5L_trav_mv_t   udata;                               /* User data for traversal */
-    herr_t          ret_value = SUCCEED;                 /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Sanity check */
-    HDassert(src_loc);
-    HDassert(dst_loc);
-    HDassert(src_name && *src_name);
-    HDassert(dst_name && *dst_name);
-
-    /* Check for flags present in creation property list */
-    if (lcpl_id != H5P_DEFAULT) {
-        unsigned crt_intmd_group;
-
-        if (NULL == (lc_plist = (H5P_genplist_t *)H5I_object(lcpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-
-        /* Get intermediate group creation property */
-        if (H5CX_get_intermediate_group(&crt_intmd_group) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for creating missing groups")
-
-        /* Set target flags for source and destination */
-        if (crt_intmd_group > 0)
-            dst_target_flags |= H5G_CRT_INTMD_GROUP;
-
-        /* Get character encoding property */
-        if (H5CX_get_encoding(&char_encoding) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for character encoding")
-    } /* end if */
-
-    /* Set up user data */
-    udata.dst_loc          = dst_loc;
-    udata.dst_name         = dst_name;
-    udata.dst_target_flags = dst_target_flags;
-    udata.cset             = char_encoding;
-    udata.copy             = copy_flag;
-
-    /* Retrieve the original # of soft / UD links that can be traversed, so
-     *  that the countdown can be reset after the first path is traversed.
-     */
-    if (H5CX_get_nlinks(&udata.orig_nlinks) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
-
-    /* Do the move */
-    if (H5G_traverse(src_loc, src_name, H5G_TARGET_MOUNT | H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__move_cb,
-                     &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to find link")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__move() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__exists_final_cb
- *
- * Purpose:	Callback for checking whether a link exists, as the final
- *              component of a path
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, March 16 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__exists_final_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                     const H5O_link_t *lnk, H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/,
-                     H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_le_t *udata = (H5L_trav_le_t *)_udata; /* User data passed in */
-
-    FUNC_ENTER_STATIC_NOERR
-
-    /* Check if the name in this group resolved to a valid link */
-    *udata->exists = (hbool_t)(lnk != NULL);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5L__exists_final_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__exists_inter_cb
- *
- * Purpose:	Callback for checking whether a link exists, as an intermediate
- *              component of a path
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Thursday, December 31 2015
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__exists_inter_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                     H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_le_t *udata     = (H5L_trav_le_t *)_udata; /* User data passed in */
-    herr_t         ret_value = SUCCEED;                 /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name in this group resolved to a valid link */
-    if (lnk != NULL) {
-        /* Check for more components to the path */
-        if (udata->sep) {
-            H5G_traverse_t cb_func; /* Callback function for tranversal */
-            char *         next;    /* Pointer to next component name */
-
-            /* Look for another separator */
-            next = udata->sep;
-            if (NULL == (udata->sep = HDstrchr(udata->sep, '/')))
-                cb_func = H5L__exists_final_cb;
-            else {
-                /* Chew through adjacent separators, if present */
-                do {
-                    *udata->sep = '\0';
-                    udata->sep++;
-                } while ('/' == *udata->sep);
-                cb_func = H5L__exists_inter_cb;
-            } /* end else */
-            if (H5G_traverse(obj_loc, next, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, udata) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
-        } /* end if */
-        else
-            *udata->exists = TRUE;
-    } /* end if */
-    else
-        *udata->exists = FALSE;
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__exists_inter_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L_exists_tolerant
- *
- * Purpose:	Returns whether a link exists in a group
- *
- * Note:	Same as H5L__exists, except that missing links are reported
- *		as 'FALSE' instead of causing failures
- *
- * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Thursday, December 31 2015
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hbool_t *exists)
-{
-    H5L_trav_le_t  udata;               /* User data for traversal */
-    H5G_traverse_t cb_func;             /* Callback function for tranversal */
-    char *         name_copy = NULL;    /* Duplicate of name */
-    char *         name_trav;           /* Name to traverse */
-    herr_t         ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Sanity checks */
-    HDassert(loc);
-    HDassert(name);
-    HDassert(exists);
-
-    /* Copy the name and skip leading '/'s */
-    name_trav = name_copy = H5MM_strdup(name);
-    while ('/' == *name_trav)
-        name_trav++;
-
-    /* A path of "/" will always exist in a file */
-    if ('\0' == *name_trav)
-        *exists = TRUE;
-    else {
-        /* Set up user data & correct callback */
-        udata.exists = exists;
-        if (NULL == (udata.sep = HDstrchr(name_trav, '/')))
-            cb_func = H5L__exists_final_cb;
-        else {
-            /* Chew through adjacent separators, if present */
-            do {
-                *udata.sep = '\0';
-                udata.sep++;
-            } while ('/' == *udata.sep);
-            cb_func = H5L__exists_inter_cb;
-        } /* end else */
-
-        /* Traverse the group hierarchy to locate the link to check */
-        if (H5G_traverse(loc, name_trav, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, &udata) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
-    }
-
-done:
-    /* Release duplicated string */
-    H5MM_xfree(name_copy);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L_exists_tolerant() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__exists
- *
- * Purpose:	Returns whether a link exists in a group
- *
- * Note:	Same as H5L_exists_tolerant, except that missing links are reported
- *		as failures
- *
- * Return:	Non-negative on success, with *exists set/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, March 16 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__exists(const H5G_loc_t *loc, const char *name, hbool_t *exists)
-{
-    H5L_trav_le_t udata;               /* User data for traversal */
-    herr_t        ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Sanity checks */
-    HDassert(loc);
-    HDassert(name);
-    HDassert(exists);
-
-    /* A path of "/" will always exist in a file */
-    if (0 == HDstrcmp(name, "/"))
-        *exists = TRUE;
-    else {
-        /* Traverse the group hierarchy to locate the object to get info about */
-        udata.exists = exists;
-        if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__exists_final_cb, &udata) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "link doesn't exist")
-    }
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L__exists() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_info_cb
- *
- * Purpose:	Callback for retrieving a link's metadata
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	James Laird
- *              Monday, April 17 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_info_cb(H5G_loc_t *grp_loc /*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t *lnk,
-                 H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gi_t *udata     = (H5L_trav_gi_t *)_udata; /* User data passed in */
-    herr_t         ret_value = SUCCEED;                 /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name in this group resolved to a valid link */
-    if (lnk == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
-
-    /* Get information from the link */
-    if (H5G_link_to_info(grp_loc->oloc, lnk, udata->linfo) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info")
-
-done:
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_info_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L_get_info
- *
- * Purpose:     Returns metadata about a link.
- *
- * Return:      SUCCEED/FAIL
- *
- * Programmer:	James Laird
- *              Monday, April 17 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_get_info(const H5G_loc_t *loc, const char *name, H5L_info2_t *linfo /*out*/)
-{
-    H5L_trav_gi_t udata;               /* User data for callback */
-    herr_t        ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    udata.linfo = linfo;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name doesn't exist")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L_get_info() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_info_by_idx_cb
- *
- * Purpose:	Callback for retrieving a link's metadata according to an
- *              index's order.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Monday, November  6 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_info_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                        const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                        H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gibi_t *udata = (H5L_trav_gibi_t *)_udata; /* User data passed in */
-    H5O_link_t       fnd_lnk;                           /* Link within group */
-    hbool_t          lnk_copied = FALSE;                /* Whether the link was copied */
-    herr_t           ret_value  = SUCCEED;              /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name of the group resolved to a valid object */
-    if (obj_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
-
-    /* Query link */
-    if (H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
-    lnk_copied = TRUE;
-
-    /* Get information from the link */
-    if (H5G_link_to_info(obj_loc->oloc, &fnd_lnk, udata->linfo) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info")
-
-done:
-    /* Reset the link information, if we have a copy */
-    if (lnk_copied)
-        H5O_msg_reset(H5O_LINK_ID, &fnd_lnk);
-
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_info_by_idx_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__get_info_by_idx
- *
- * Purpose:     Internal routine to retrieve link info according to an
- *              index's order.
- *
- * Return:      SUCCEED/FAIL
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__get_info_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
-                     hsize_t n, H5L_info2_t *linfo /*out*/)
-{
-    H5L_trav_gibi_t udata;               /* User data for callback */
-    herr_t          ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check arguments */
-    HDassert(loc);
-    HDassert(name && *name);
-    HDassert(linfo);
-
-    /* Set up user data for callback */
-    udata.idx_type = idx_type;
-    udata.order    = order;
-    udata.n        = n;
-    udata.linfo    = linfo;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_by_idx_cb, &udata) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_info_by_idx() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__get_name_by_idx_cb
- *
- * Purpose:	Callback for retrieving a link's name according to an
- *              index's order.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Saturday, November 11 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5L__get_name_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
-                        const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
-                        H5G_own_loc_t *own_loc /*out*/)
-{
-    H5L_trav_gnbi_t *udata     = (H5L_trav_gnbi_t *)_udata; /* User data passed in */
-    herr_t           ret_value = SUCCEED;                   /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check if the name of the group resolved to a valid object */
-    if (obj_loc == NULL)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
-
-    /* Query link */
-    if ((udata->name_len = H5G_obj_get_name_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n,
-                                                   udata->name, udata->size)) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
-
-done:
-    /* Indicate that this callback didn't take ownership of the group *
-     * location for the object */
-    *own_loc = H5G_OWN_NONE;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_name_by_idx_cb() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L__get_name_by_idx
- *
- * Purpose:     Internal routine to retrieve link name according to an
- *              index's order.
- *
- * Return:      SUCCEED/FAIL
- *
- *-------------------------------------------------------------------------
- */
-ssize_t
-H5L__get_name_by_idx(const H5G_loc_t *loc, const char *group_name, H5_index_t idx_type, H5_iter_order_t order,
-                     hsize_t n, char *name /*out*/, size_t size)
-{
-    H5L_trav_gnbi_t udata;            /* User data for callback */
-    ssize_t         ret_value = FAIL; /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check arguments */
-    HDassert(loc);
-    HDassert(group_name && *group_name);
-
-    /* Set up user data for callback */
-    udata.idx_type = idx_type;
-    udata.order    = order;
-    udata.n        = n;
-    udata.name     = name;
-    udata.size     = size;
-    udata.name_len = -1;
-
-    /* Traverse the group hierarchy to locate the link to get name of */
-    if (H5G_traverse(loc, group_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_name_by_idx_cb, &udata) <
-        0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get name")
-
-    /* Set the return value */
-    ret_value = udata.name_len;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__get_name_by_idx() */
-
-/*-------------------------------------------------------------------------
- * Function:	H5L__link_copy_file
- *
- * Purpose:     Copy a link and the object it points to from one file to
- *              another.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Sep 29 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L__link_copy_file(H5F_t *dst_file, const H5O_link_t *_src_lnk, const H5O_loc_t *src_oloc,
-                    H5O_link_t *dst_lnk, H5O_copy_t *cpy_info)
-{
-    H5O_link_t        tmp_src_lnk;                   /* Temporary copy of src link, when needed */
-    const H5O_link_t *src_lnk            = _src_lnk; /* Source link */
-    hbool_t           dst_lnk_init       = FALSE;    /* Whether the destination link is initialized */
-    hbool_t           expanded_link_open = FALSE;    /* Whether the target location has been opened */
-    H5G_loc_t         tmp_src_loc;                   /* Group location holding target object */
-    H5G_name_t        tmp_src_path;                  /* Path for target object */
-    H5O_loc_t         tmp_src_oloc;                  /* Object location for target object */
-    herr_t            ret_value = SUCCEED;           /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* check arguments */
-    HDassert(dst_file);
-    HDassert(src_lnk);
-    HDassert(dst_lnk);
-    HDassert(cpy_info);
-
-    /* Expand soft or external link, if requested */
-    if ((H5L_TYPE_SOFT == src_lnk->type && cpy_info->expand_soft_link) ||
-        (H5L_TYPE_EXTERNAL == src_lnk->type && cpy_info->expand_ext_link)) {
-        H5G_loc_t  lnk_grp_loc;  /* Group location holding link */
-        H5G_name_t lnk_grp_path; /* Path for link */
-        htri_t     tar_exists;   /* Whether the target object exists */
-
-        /* Set up group location for link */
-        H5G_name_reset(&lnk_grp_path);
-        lnk_grp_loc.path = &lnk_grp_path;
-        lnk_grp_loc.oloc = (H5O_loc_t *)src_oloc; /* Casting away const OK -QAK */
-
-        /* Check if the target object exists */
-        if ((tar_exists = H5G_loc_exists(&lnk_grp_loc, src_lnk->name)) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to check if target object exists")
-
-        if (tar_exists) {
-            /* Make a temporary copy of the link, so that it will not change the
-             * info in the cache when we change it to a hard link */
-            if (NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, &tmp_src_lnk))
-                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
-
-            /* Set up group location for target object.  Let H5G_traverse expand
-             * the link. */
-            tmp_src_loc.path = &tmp_src_path;
-            tmp_src_loc.oloc = &tmp_src_oloc;
-            if (H5G_loc_reset(&tmp_src_loc) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to reset location")
-
-            /* Find the target object */
-            if (H5G_loc_find(&lnk_grp_loc, src_lnk->name, &tmp_src_loc) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to find target object")
-            expanded_link_open = TRUE;
-
-            /* Convert symbolic link to hard link */
-            if (tmp_src_lnk.type == H5L_TYPE_SOFT)
-                tmp_src_lnk.u.soft.name = (char *)H5MM_xfree(tmp_src_lnk.u.soft.name);
-            else if (tmp_src_lnk.u.ud.size > 0)
-                tmp_src_lnk.u.ud.udata = H5MM_xfree(tmp_src_lnk.u.ud.udata);
-            tmp_src_lnk.type        = H5L_TYPE_HARD;
-            tmp_src_lnk.u.hard.addr = tmp_src_oloc.addr;
-            src_lnk                 = &tmp_src_lnk;
-        } /* end if */
-    }     /* end if */
-
-    /* Copy src link information to dst link information */
-    if (NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, dst_lnk))
-        HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
-    dst_lnk_init = TRUE;
-
-    /* Check if object in source group is a hard link & copy it */
-    if (H5L_TYPE_HARD == src_lnk->type) {
-        H5O_loc_t new_dst_oloc; /* Copied object location in destination */
-
-        /* Set up copied object location to fill in */
-        H5O_loc_reset(&new_dst_oloc);
-        new_dst_oloc.file = dst_file;
-
-        if (!expanded_link_open) {
-            /* Build temporary object location for source */
-            H5O_loc_reset(&tmp_src_oloc);
-            tmp_src_oloc.file = src_oloc->file;
-            tmp_src_oloc.addr = src_lnk->u.hard.addr;
-        } /* end if */
-        HDassert(H5F_addr_defined(tmp_src_oloc.addr));
-
-        /* Copy the shared object from source to destination */
-        /* Don't care about obj_type or udata because those are only important
-         * for old style groups */
-        if (H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, cpy_info, TRUE, NULL, NULL) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object")
-
-        /* Copy new destination object's information for eventual insertion */
-        dst_lnk->u.hard.addr = new_dst_oloc.addr;
-    } /* end if */
-
-done:
-    /* Check if we used a temporary src link */
-    if (src_lnk != _src_lnk) {
-        HDassert(src_lnk == &tmp_src_lnk);
-        H5O_msg_reset(H5O_LINK_ID, &tmp_src_lnk);
-    } /* end if */
-    if (ret_value < 0)
-        if (dst_lnk_init)
-            H5O_msg_reset(H5O_LINK_ID, dst_lnk);
-    /* Check if we need to free the temp source oloc */
-    if (expanded_link_open)
-        if (H5G_loc_free(&tmp_src_loc) < 0)
-            HDONE_ERROR(H5E_LINK, H5E_CANTFREE, FAIL, "unable to free object")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L__link_copy_file() */
-
-/*-------------------------------------------------------------------------
- * Function:    H5L_iterate
- *
- * Purpose:     Iterates through links in a group
- *
- * Return:      SUCCEED/FAIL
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5L_iterate(H5G_loc_t *loc, const char *group_name, H5_index_t idx_type, H5_iter_order_t order,
-            hsize_t *idx_p, H5L_iterate2_t op, void *op_data)
-{
-    H5G_link_iterate_t lnk_op;           /* Link operator                    */
-    hsize_t            last_lnk;         /* Index of last object looked at   */
-    hsize_t            idx;              /* Internal location to hold index  */
-    herr_t             ret_value = FAIL; /* Return value                     */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity checks */
-    HDassert(loc);
-    HDassert(group_name);
-    HDassert(op);
-
-    /* Set up iteration beginning/end info */
-    idx      = (idx_p == NULL ? 0 : *idx_p);
-    last_lnk = 0;
-
-    /* Build link operator info */
-    lnk_op.op_type        = H5G_LINK_OP_NEW;
-    lnk_op.op_func.op_new = op;
-
-    /* Iterate over the links */
-    if ((ret_value = H5G_iterate(loc, group_name, idx_type, order, idx, &last_lnk, &lnk_op, op_data)) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link iteration failed")
-
-    /* Set the index we stopped at */
-    if (idx_p)
-        *idx_p = last_lnk;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_iterate() */
diff --git a/src/H5Lint.c b/src/H5Lint.c
new file mode 100644
index 0000000..a8e9ba2
--- /dev/null
+++ b/src/H5Lint.c
@@ -0,0 +1,2240 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://www.hdfgroup.org/licenses.               *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5Lmodule.h" /* This source code file is part of the H5L module */
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"   /* Generic Functions                        */
+#include "H5CXprivate.h" /* API Contexts                             */
+#include "H5Eprivate.h"  /* Error handling                           */
+#include "H5Fprivate.h"  /* File access                              */
+#include "H5Gprivate.h"  /* Groups                                   */
+#include "H5Iprivate.h"  /* IDs                                      */
+#include "H5Lpkg.h"      /* Links                                    */
+#include "H5MMprivate.h" /* Memory management                        */
+#include "H5Oprivate.h"  /* File objects                             */
+#include "H5Pprivate.h"  /* Property lists                           */
+#include "H5VLprivate.h" /* Virtual Object Layer                     */
+
+/****************/
+/* Local Macros */
+/****************/
+
+#define H5L_MIN_TABLE_SIZE 32 /* Minimum size of the user-defined link type table if it is allocated */
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* User data for path traversal routine for getting link info by name */
+typedef struct {
+    H5L_info2_t *linfo; /* Buffer to return to user */
+} H5L_trav_gi_t;
+
+/* User data for path traversal callback to creating a link */
+typedef struct {
+    H5F_t *           file;      /* Pointer to the file */
+    H5P_genplist_t *  lc_plist;  /* Link creation property list */
+    H5G_name_t *      path;      /* Path to object being linked */
+    H5O_obj_create_t *ocrt_info; /* Pointer to object creation info */
+    H5O_link_t *      lnk;       /* Pointer to link information to insert */
+} H5L_trav_cr_t;
+
+/* User data for path traversal routine for moving and renaming a link */
+typedef struct {
+    const char *     dst_name;         /* Destination name for moving object */
+    H5T_cset_t       cset;             /* Char set for new name */
+    const H5G_loc_t *dst_loc;          /* Destination location for moving object */
+    unsigned         dst_target_flags; /* Target flags for destination object */
+    hbool_t          copy;             /* TRUE if this is a copy operation */
+    size_t           orig_nlinks; /* The original value for the # of soft / UD links that can be traversed */
+} H5L_trav_mv_t;
+
+/* User data for path traversal routine for moving and renaming an object */
+typedef struct {
+    H5F_t *     file; /* Pointer to the file */
+    H5O_link_t *lnk;  /* Pointer to link information to insert */
+    hbool_t     copy; /* TRUE if this is a copy operation */
+} H5L_trav_mv2_t;
+
+/* User data for path traversal routine for checking if a link exists */
+typedef struct {
+    /* Down */
+    char *sep; /* Pointer to next separator in the string */
+
+    /* Up */
+    hbool_t *exists; /* Whether the link exists or not */
+} H5L_trav_le_t;
+
+/* User data for path traversal routine for getting link value */
+typedef struct {
+    size_t size; /* Size of user buffer */
+    void * buf;  /* User buffer */
+} H5L_trav_gv_t;
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static int    H5L__find_class_idx(H5L_type_t id);
+static herr_t H5L__link_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                           H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__create_real(const H5G_loc_t *link_loc, const char *link_name, H5G_name_t *obj_path,
+                               H5F_t *obj_file, H5O_link_t *lnk, H5O_obj_create_t *ocrt_info, hid_t lcpl_id);
+static herr_t H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size);
+static herr_t H5L__get_val_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                              H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__get_val_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                     H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                     H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__delete_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                             H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__delete_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                    H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                    H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__move_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                           H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__move_dest_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__exists_final_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                   H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                   H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__exists_inter_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                   H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                   H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__get_info_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                               H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__get_info_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                      H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                      H5G_own_loc_t *own_loc /*out*/);
+static herr_t H5L__get_name_by_idx_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                                      H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                                      H5G_own_loc_t *own_loc /*out*/);
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Information about user-defined links */
+static size_t       H5L_table_alloc_g = 0;
+static size_t       H5L_table_used_g  = 0;
+static H5L_class_t *H5L_table_g       = NULL;
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L_init
+ *
+ * Purpose:     Initialize the interface from some other package.
+ *
+ * Return:      Success:	non-negative
+ *
+ *              Failure:	negative
+ *
+ * Programmer:	James Laird
+ *              Thursday, July 13, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_init(void)
+{
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+    /* FUNC_ENTER() does all the work */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_init() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__init_package
+ *
+ * Purpose:     Initialize information specific to H5L interface.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Tuesday, January 24, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__init_package(void)
+{
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Initialize user-defined link classes */
+    if (H5L_register_external() < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "unable to register external link class")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_init_package() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L_term_package
+ *
+ * Purpose:     Terminate any resources allocated in H5L__init_package.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Tuesday, January 24, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5L_term_package(void)
+{
+    int n = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if (H5_PKG_INIT_VAR) {
+        /* Free the table of link types */
+        if (H5L_table_g) {
+            H5L_table_g      = (H5L_class_t *)H5MM_xfree(H5L_table_g);
+            H5L_table_used_g = H5L_table_alloc_g = 0;
+            n++;
+        } /* end if */
+
+        /* Mark the interface as uninitialized */
+        if (0 == n)
+            H5_PKG_INIT_VAR = FALSE;
+    } /* end if */
+
+    FUNC_LEAVE_NOAPI(n)
+} /* H5L_term_package() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__find_class_idx
+ *
+ * Purpose:	Given a link class ID, return the offset in the global array
+ *              that holds all the registered link classes.
+ *
+ * Return:	Success:	Non-negative index of entry in global
+ *                              link class table.
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *              Monday, July 10, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+H5L__find_class_idx(H5L_type_t id)
+{
+    size_t i;                /* Local index variable */
+    int    ret_value = FAIL; /* Return value */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    for (i = 0; i < H5L_table_used_g; i++)
+        if (H5L_table_g[i].id == id)
+            HGOTO_DONE((int)i)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__find_class_idx */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_find_class
+ *
+ * Purpose:	Given a link class ID return a pointer to a global struct that
+ *		defines the link class.
+ *
+ * Return:	Success:	Ptr to entry in global link class table.
+ *		Failure:	NULL
+ *
+ * Programmer:	James Laird
+ *              Monday, July 10, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+const H5L_class_t *
+H5L_find_class(H5L_type_t id)
+{
+    int          idx;              /* Filter index in global table */
+    H5L_class_t *ret_value = NULL; /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* Get the index in the global table */
+    if ((idx = H5L__find_class_idx(id)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, NULL, "unable to find link class")
+
+    /* Set return value */
+    ret_value = H5L_table_g + idx;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_find_class */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_register
+ *
+ * Purpose:	Registers a class of user-defined links, or changes the
+ *              behavior of an existing class.
+ *
+ *              See H5Lregister for full documentation.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Monday, July 10, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_register(const H5L_class_t *cls)
+{
+    size_t i;                   /* Local index variable */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    HDassert(cls);
+    HDassert(cls->id >= 0 && cls->id <= H5L_TYPE_MAX);
+
+    /* Is the link type already registered? */
+    for (i = 0; i < H5L_table_used_g; i++)
+        if (H5L_table_g[i].id == cls->id)
+            break;
+
+    /* Filter not already registered */
+    if (i >= H5L_table_used_g) {
+        if (H5L_table_used_g >= H5L_table_alloc_g) {
+            size_t       n     = MAX(H5L_MIN_TABLE_SIZE, (2 * H5L_table_alloc_g));
+            H5L_class_t *table = (H5L_class_t *)H5MM_realloc(H5L_table_g, (n * sizeof(H5L_class_t)));
+            if (!table)
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend link type table")
+            H5L_table_g       = table;
+            H5L_table_alloc_g = n;
+        } /* end if */
+
+        /* Initialize */
+        i = H5L_table_used_g++;
+    } /* end if */
+
+    /* Copy link class info into table */
+    H5MM_memcpy(H5L_table_g + i, cls, sizeof(H5L_class_t));
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_register */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_unregister
+ *
+ * Purpose:	Unregisters a class of user-defined links.
+ *
+ *              See H5Lunregister for full documentation.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Monday, July 10, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_unregister(H5L_type_t id)
+{
+    size_t i;                   /* Local index variable */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    HDassert(id >= 0 && id <= H5L_TYPE_MAX);
+
+    /* Is the filter already registered? */
+    for (i = 0; i < H5L_table_used_g; i++)
+        if (H5L_table_g[i].id == id)
+            break;
+
+    /* Fail if filter not found */
+    if (i >= H5L_table_used_g)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "link class is not registered")
+
+    /* Remove filter from table */
+    /* Don't worry about shrinking table size (for now) */
+    HDmemmove(&H5L_table_g[i], &H5L_table_g[i + 1], sizeof(H5L_class_t) * ((H5L_table_used_g - 1) - i));
+    H5L_table_used_g--;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_unregister() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_is_registered
+ *
+ * Purpose:     Tests whether a user-defined link class has been registered
+ *              or not.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_is_registered(H5L_type_t id, hbool_t *is_registered)
+{
+    size_t i; /* Local index variable */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check args */
+    HDassert(is_registered);
+
+    /* Is the link class already registered? */
+    *is_registered = FALSE;
+    for (i = 0; i < H5L_table_used_g; i++)
+        if (H5L_table_g[i].id == id) {
+            *is_registered = TRUE;
+            break;
+        }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5L_is_registered() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_link
+ *
+ * Purpose:	Creates a link from OBJ_ID to CUR_NAME.  See H5Olink() for
+ *		full documentation.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Tuesday, December 13, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_link(const H5G_loc_t *new_loc, const char *new_name, H5G_loc_t *obj_loc, hid_t lcpl_id)
+{
+    H5O_link_t lnk;                 /* Link to insert */
+    herr_t     ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check args */
+    HDassert(new_loc);
+    HDassert(obj_loc);
+    HDassert(new_name && *new_name);
+
+    /* The link callback will check that the object isn't being hard linked
+     * into a different file, so we don't need to do it here (there could be
+     * external links along the path).
+     */
+
+    /* Construct link information for eventual insertion */
+    lnk.type        = H5L_TYPE_HARD;
+    lnk.u.hard.addr = obj_loc->oloc->addr;
+
+    /* Create the link */
+    if (H5L__create_real(new_loc, new_name, obj_loc->path, obj_loc->oloc->file, &lnk, NULL, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_link() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_link_object
+ *
+ * Purpose:	Creates a new object and a link to it.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, April 9, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_link_object(const H5G_loc_t *new_loc, const char *new_name, H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
+{
+    H5O_link_t lnk;                 /* Link to insert */
+    herr_t     ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check args */
+    HDassert(new_loc);
+    HDassert(new_name && *new_name);
+    HDassert(ocrt_info);
+
+    /* The link callback will check that the object isn't being hard linked
+     * into a different file, so we don't need to do it here (there could be
+     * external links along the path).
+     */
+
+    /* Construct link information for eventual insertion */
+    lnk.type = H5L_TYPE_HARD;
+
+    /* Create the link */
+    if (H5L__create_real(new_loc, new_name, NULL, NULL, &lnk, ocrt_info, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_link_object() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__link_cb
+ *
+ * Purpose:	Callback for creating a link to an object.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, September 19, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__link_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
+             H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_cr_t *udata  = (H5L_trav_cr_t *)_udata; /* User data passed in */
+    H5G_t *        grp    = NULL;    /* H5G_t for this group, opened to pass to user callback */
+    hid_t          grp_id = FAIL;    /* Id for this group (passed to user callback */
+    H5G_loc_t      temp_loc;         /* For UD callback */
+    hbool_t temp_loc_init = FALSE;   /* Temporary location for UD callback (temp_loc) has been initialized */
+    hbool_t obj_created   = FALSE;   /* Whether an object was created (through a hard link) */
+    herr_t  ret_value     = SUCCEED; /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name in this group resolved to a valid location */
+    /* (which is not what we want) */
+    if (obj_loc != NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name already exists")
+
+    /* Check for crossing file boundaries with a new hard link */
+    if (udata->lnk->type == H5L_TYPE_HARD) {
+        /* Check for creating an object */
+        /* (only for hard links) */
+        if (udata->ocrt_info) {
+            H5G_loc_t new_loc; /* Group location for new object */
+
+            /* Create new object at this location */
+            if (NULL ==
+                (udata->ocrt_info->new_obj = H5O_obj_create(grp_loc->oloc->file, udata->ocrt_info->obj_type,
+                                                            udata->ocrt_info->crt_info, &new_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create object")
+
+            /* Set address for hard link */
+            udata->lnk->u.hard.addr = new_loc.oloc->addr;
+
+            /* Set object path to use for setting object name (below) */
+            udata->path = new_loc.path;
+
+            /* Indicate that an object was created */
+            obj_created = TRUE;
+        } /* end if */
+        else {
+            /* Check that both objects are in same file */
+            if (!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
+                HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "interfile hard links are not allowed")
+        } /* end else */
+    }     /* end if */
+
+    /* Set 'standard' aspects of link */
+    udata->lnk->corder =
+        0; /* Will be re-written during group insertion, if the group is tracking creation order */
+    udata->lnk->corder_valid = FALSE; /* Creation order not valid (yet) */
+
+    /* Check for non-default link creation properties */
+    if (udata->lc_plist) {
+        /* Get character encoding property */
+        if (H5CX_get_encoding(&udata->lnk->cset) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get 'character set' property")
+    } /* end if */
+    else
+        udata->lnk->cset = H5F_DEFAULT_CSET; /* Default character encoding for link */
+
+    /* Set the link's name correctly */
+    /* Casting away const OK -QAK */
+    udata->lnk->name = (char *)name;
+
+    /* Insert link into group */
+    if (H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE,
+                       udata->ocrt_info ? udata->ocrt_info->obj_type : H5O_TYPE_UNKNOWN,
+                       udata->ocrt_info ? udata->ocrt_info->crt_info : NULL) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link for object")
+
+    /* Set object's path if it has been passed in and is not set */
+    if (udata->path != NULL && udata->path->user_path_r == NULL)
+        if (H5G_name_set(grp_loc->path, udata->path, name) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "cannot set name")
+
+    /* If link is a user-defined link, trigger its creation callback if it has one */
+    if (udata->lnk->type >= H5L_TYPE_UD_MIN) {
+        const H5L_class_t *link_class; /* User-defined link class */
+
+        /* Get the link class for this type of link. */
+        if (NULL == (link_class = H5L_find_class(udata->lnk->type)))
+            HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "unable to get class of UD link")
+
+        if (link_class->create_func != NULL) {
+            H5O_loc_t  temp_oloc;
+            H5G_name_t temp_path;
+
+            /* Create a temporary location (or else H5G_open will do a shallow
+             * copy and wipe out grp_loc)
+             */
+            H5G_name_reset(&temp_path);
+            if (H5O_loc_copy_deep(&temp_oloc, grp_loc->oloc) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
+
+            temp_loc.oloc = &temp_oloc;
+            temp_loc.path = &temp_path;
+            temp_loc_init = TRUE;
+
+            /* Set up location for user-defined callback */
+            if (NULL == (grp = H5G_open(&temp_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
+            if ((grp_id = H5VL_wrap_register(H5I_GROUP, grp, TRUE)) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register ID for group")
+
+            /* Make callback */
+            if ((link_class->create_func)(name, grp_id, udata->lnk->u.ud.udata, udata->lnk->u.ud.size,
+                                          H5P_DEFAULT) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "link creation callback failed")
+        } /* end if */
+    }     /* end if */
+
+done:
+    /* Check if an object was created */
+    if (obj_created) {
+        H5O_loc_t oloc; /* Object location for created object */
+
+        /* Set up object location */
+        HDmemset(&oloc, 0, sizeof(oloc));
+        oloc.file = grp_loc->oloc->file;
+        oloc.addr = udata->lnk->u.hard.addr;
+
+        /* Decrement refcount on new object's object header in memory */
+        if (H5O_dec_rc_by_loc(&oloc) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
+    } /* end if */
+
+    /* Close the location given to the user callback if it was created */
+    if (grp_id >= 0) {
+        if (H5I_dec_app_ref(grp_id) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close ID from UD callback")
+    } /* end if */
+    else if (grp != NULL) {
+        if (H5G_close(grp) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
+    } /* end if */
+    else if (temp_loc_init)
+        H5G_loc_free(&temp_loc);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__link_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__create_real
+ *
+ * Purpose:     Creates a link at a path location
+ *
+ *              lnk should have linkclass-specific information already
+ *              set, but this function will take care of setting name.
+ *
+ *              obj_path can be NULL if the object's path doesn't need to
+ *              be set, and obj_file can be NULL if the object is not a
+ *              hard link.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Monday, December  5, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__create_real(const H5G_loc_t *link_loc, const char *link_name, H5G_name_t *obj_path, H5F_t *obj_file,
+                 H5O_link_t *lnk, H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
+{
+    char *          norm_link_name = NULL;              /* Pointer to normalized link name */
+    unsigned        target_flags   = H5G_TARGET_NORMAL; /* Flags to pass to group traversal function */
+    H5P_genplist_t *lc_plist       = NULL;              /* Link creation property list */
+    H5L_trav_cr_t   udata;                              /* User data for callback */
+    herr_t          ret_value = SUCCEED;                /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check args */
+    HDassert(link_loc);
+    HDassert(link_name && *link_name);
+    HDassert(lnk);
+    HDassert(lnk->type >= H5L_TYPE_HARD && lnk->type <= H5L_TYPE_MAX);
+
+    /* Get normalized link name */
+    if ((norm_link_name = H5G_normalize(link_name)) == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
+
+    /* Check for flags present in creation property list */
+    if (lcpl_id != H5P_DEFAULT) {
+        unsigned crt_intmd_group;
+
+        /* Get link creation property list */
+        if (NULL == (lc_plist = (H5P_genplist_t *)H5I_object(lcpl_id)))
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
+
+        /* Get intermediate group creation property */
+        if (H5CX_get_intermediate_group(&crt_intmd_group) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get 'create intermediate group' property")
+
+        if (crt_intmd_group > 0)
+            target_flags |= H5G_CRT_INTMD_GROUP;
+    } /* end if */
+
+    /* Set up user data
+     * FILE is used to make sure that hard links don't cross files, and
+     * should be NULL for other link types.
+     * LC_PLIST is a pointer to the link creation property list.
+     * PATH is a pointer to the path of the object being inserted if this is
+     * a hard link; this is used to set the paths to objects when they are
+     * created.  For other link types, this is NULL.
+     * OCRT_INFO is a pointer to the structure for object creation.
+     * LNK is the link struct passed into this function.  At this point all
+     * of its fields should be populated except for name, which is set when
+     * inserting it in the callback.
+     */
+    udata.file      = obj_file;
+    udata.lc_plist  = lc_plist;
+    udata.path      = obj_path;
+    udata.ocrt_info = ocrt_info;
+    udata.lnk       = lnk;
+
+    /* Traverse the destination path & create new link */
+    if (H5G_traverse(link_loc, link_name, target_flags, H5L__link_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINSERT, FAIL, "can't insert link")
+
+done:
+    /* Free the normalized path name */
+    if (norm_link_name)
+        H5MM_xfree(norm_link_name);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__create_real() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__create_hard
+ *
+ * Purpose:	Creates a hard link from NEW_NAME to CUR_NAME.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, April  6, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__create_hard(H5G_loc_t *cur_loc, const char *cur_name, const H5G_loc_t *link_loc, const char *link_name,
+                 hid_t lcpl_id)
+{
+    char *     norm_cur_name = NULL; /* Pointer to normalized current name */
+    H5F_t *    link_file     = NULL; /* Pointer to file to link to */
+    H5O_link_t lnk;                  /* Link to insert */
+    H5G_loc_t  obj_loc;              /* Location of object to link to */
+    H5G_name_t path;                 /* obj_loc's path*/
+    H5O_loc_t  oloc;                 /* obj_loc's oloc */
+    hbool_t    loc_valid = FALSE;
+    herr_t     ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args */
+    HDassert(cur_loc);
+    HDassert(cur_name && *cur_name);
+    HDassert(link_loc);
+    HDassert(link_name && *link_name);
+
+    /* Get normalized copy of the current name */
+    if ((norm_cur_name = H5G_normalize(cur_name)) == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
+
+    /* Set up link data specific to hard links */
+    lnk.type = H5L_TYPE_HARD;
+
+    /* Get object location for object pointed to */
+    obj_loc.path = &path;
+    obj_loc.oloc = &oloc;
+    H5G_loc_reset(&obj_loc);
+    if (H5G_loc_find(cur_loc, norm_cur_name, &obj_loc) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "source object not found")
+    loc_valid = TRUE;
+
+    /* Construct link information for eventual insertion */
+    lnk.u.hard.addr = obj_loc.oloc->addr;
+
+    /* Set destination's file information */
+    link_file = obj_loc.oloc->file;
+
+    /* Create actual link to the object.  Pass in NULL for the path, since this
+     * function shouldn't change an object's user path. */
+    if (H5L__create_real(link_loc, link_name, NULL, link_file, &lnk, NULL, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
+
+done:
+    /* Free the object header location */
+    if (loc_valid)
+        if (H5G_loc_free(&obj_loc) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to free location")
+
+    /* Free the normalized path name */
+    if (norm_cur_name)
+        H5MM_xfree(norm_cur_name);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__create_hard() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__create_soft
+ *
+ * Purpose:     Creates a soft link from LINK_NAME to TARGET_PATH.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, April  6, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__create_soft(const char *target_path, const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id)
+{
+    char *     norm_target = NULL;  /* Pointer to normalized current name */
+    H5O_link_t lnk;                 /* Link to insert */
+    herr_t     ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args */
+    HDassert(link_loc);
+    HDassert(target_path && *target_path);
+    HDassert(link_name && *link_name);
+
+    /* Get normalized copy of the link target */
+    if ((norm_target = H5G_normalize(target_path)) == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
+
+    /* Set up link data specific to soft links */
+    lnk.type        = H5L_TYPE_SOFT;
+    lnk.u.soft.name = norm_target;
+
+    /* Create actual link to the object */
+    if (H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
+
+done:
+    /* Free the normalized target name */
+    if (norm_target)
+        H5MM_xfree(norm_target);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__create_soft() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__create_ud
+ *
+ * Purpose:	Creates a user-defined link. See H5Lcreate_ud for
+ *              full documentation.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Friday, May 19, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__create_ud(const H5G_loc_t *link_loc, const char *link_name, const void *ud_data, size_t ud_data_size,
+               H5L_type_t type, hid_t lcpl_id)
+{
+    H5O_link_t lnk;                 /* Link to insert */
+    herr_t     ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args */
+    HDassert(type >= H5L_TYPE_UD_MIN && type <= H5L_TYPE_MAX);
+    HDassert(link_loc);
+    HDassert(link_name && *link_name);
+    HDassert(ud_data_size == 0 || ud_data);
+
+    /* Initialize the link struct's pointer to its udata buffer */
+    lnk.u.ud.udata = NULL;
+
+    /* Make sure that this link class is registered */
+    if (H5L__find_class_idx(type) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "link class has not been registered with library")
+
+    /* Fill in UD link-specific information in the link struct*/
+    if (ud_data_size > 0) {
+        lnk.u.ud.udata = H5MM_malloc((size_t)ud_data_size);
+        H5MM_memcpy(lnk.u.ud.udata, ud_data, (size_t)ud_data_size);
+    } /* end if */
+    else
+        lnk.u.ud.udata = NULL;
+
+    lnk.u.ud.size = ud_data_size;
+    lnk.type      = type;
+
+    /* Create actual link to the object */
+    if (H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to register new name for object")
+
+done:
+    /* Free the link's udata buffer if it's been allocated */
+    H5MM_xfree(lnk.u.ud.udata);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__create_ud() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_val_real
+ *
+ * Purpose:	Retrieve link value from a link object
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 13 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size)
+{
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity check */
+    HDassert(lnk);
+
+    /* Check for soft link */
+    if (H5L_TYPE_SOFT == lnk->type) {
+        /* Copy to output buffer */
+        if (size > 0 && buf) {
+            HDstrncpy((char *)buf, lnk->u.soft.name, size);
+            if (HDstrlen(lnk->u.soft.name) >= size)
+                ((char *)buf)[size - 1] = '\0';
+        } /* end if */
+    }     /* end if */
+    /* Check for user-defined link */
+    else if (lnk->type >= H5L_TYPE_UD_MIN) {
+        const H5L_class_t *link_class; /* User-defined link class */
+
+        /* Get the link class for this type of link.  It's okay if the class
+         * isn't registered, though--we just can't give any more information
+         * about it
+         */
+        link_class = H5L_find_class(lnk->type);
+
+        if (link_class != NULL && link_class->query_func != NULL) {
+            if ((link_class->query_func)(lnk->name, lnk->u.ud.udata, lnk->u.ud.size, buf, size) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "query callback returned failure")
+        } /* end if */
+        else if (buf && size > 0)
+            ((char *)buf)[0] = '\0';
+    } /* end if */
+    else
+        HGOTO_ERROR(H5E_LINK, H5E_BADTYPE, FAIL, "object is not a symbolic or user-defined link")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_val_real() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_val_cb
+ *
+ * Purpose:	Callback for retrieving link value or udata.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Tuesday, September 20, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_val_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+                H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gv_t *udata     = (H5L_trav_gv_t *)_udata; /* User data passed in */
+    herr_t         ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name in this group resolved to a valid link */
+    if (lnk == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "'%s' doesn't exist", name)
+
+    /* Retrieve the value for the link */
+    if (H5L__get_val_real(lnk, udata->buf, udata->size) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
+
+done:
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_val_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_val
+ *
+ * Purpose:	Returns the value of a symbolic link or the udata for a
+ *              user-defined link.
+ *
+ * Return:	Success:	Non-negative, with at most SIZE bytes of the
+ *				link value copied into the BUF buffer.  If the
+ *				link value is larger than SIZE characters
+ *				counting the null terminator then the BUF
+ *				result will not be null terminated.
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, April 13, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__get_val(const H5G_loc_t *loc, const char *name, void *buf /*out*/, size_t size)
+{
+    H5L_trav_gv_t udata;               /* User data for callback */
+    herr_t        ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity check */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up user data for retrieving information */
+    udata.size = size;
+    udata.buf  = buf;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5L__get_val() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_val_by_idx_cb
+ *
+ * Purpose:	Callback for retrieving a link's value according to an
+ *              index's order.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 13 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_val_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                       const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                       H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gvbi_t *udata = (H5L_trav_gvbi_t *)_udata; /* User data passed in */
+    H5O_link_t       fnd_lnk;                           /* Link within group */
+    hbool_t          lnk_copied = FALSE;                /* Whether the link was copied */
+    herr_t           ret_value  = SUCCEED;              /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name of the group resolved to a valid object */
+    if (obj_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
+
+    /* Query link */
+    if (H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
+    lnk_copied = TRUE;
+
+    /* Retrieve the value for the link */
+    if (H5L__get_val_real(&fnd_lnk, udata->buf, udata->size) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
+
+done:
+    /* Reset the link information, if we have a copy */
+    if (lnk_copied)
+        H5O_msg_reset(H5O_LINK_ID, &fnd_lnk);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_val_by_idx_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__get_val_by_idx
+ *
+ * Purpose:     Internal routine to query a link value according to the
+ *              index within a group
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__get_val_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
+                    hsize_t n, void *buf /*out*/, size_t size)
+{
+    H5L_trav_gvbi_t udata;               /* User data for callback */
+    herr_t          ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up user data for retrieving information */
+    udata.idx_type = idx_type;
+    udata.order    = order;
+    udata.n        = n;
+    udata.buf      = buf;
+    udata.size     = size;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info for index: %llu", (unsigned long long)n)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_val_by_idx() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__delete_cb
+ *
+ * Purpose:	Callback for deleting a link.  This routine
+ *              actually deletes the link
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, September 19, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__delete_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk,
+               H5G_loc_t H5_ATTR_UNUSED *obj_loc, void H5_ATTR_UNUSED *_udata /*in,out*/,
+               H5G_own_loc_t *own_loc /*out*/)
+{
+    herr_t ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the group resolved to a valid link */
+    if (grp_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
+
+    /* Check if the name in this group resolved to a valid link */
+    if (name == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
+
+    /* Check for non-existent (NULL) link.
+     * Note that this can also occur when attempting to remove '.'
+     */
+    if (lnk == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL,
+                    "callback link pointer is NULL (specified link may be '.' or not exist)")
+
+    /* Remove the link from the group */
+    if (H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, name) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to remove link from group")
+
+done:
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__delete_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__delete
+ *
+ * Purpose:	Delete a link from a group.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, September 17, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__delete(const H5G_loc_t *loc, const char *name)
+{
+    char * norm_name = NULL;    /* Pointer to normalized name */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity check */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Get normalized copy of the name */
+    if ((norm_name = H5G_normalize(name)) == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
+
+    /* Set up user data for unlink operation */
+    if (H5G_traverse(loc, norm_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT, H5L__delete_cb,
+                     NULL) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTREMOVE, FAIL, "can't unlink object")
+
+done:
+    /* Free the normalized path name */
+    if (norm_name)
+        H5MM_xfree(norm_name);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__delete() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__delete_by_idx_cb
+ *
+ * Purpose:	Callback for removing a link according to an index's order.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 13 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__delete_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                      const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                      H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gvbi_t *udata     = (H5L_trav_gvbi_t *)_udata; /* User data passed in */
+    herr_t           ret_value = SUCCEED;                   /* Return value */
+
+    FUNC_ENTER_STATIC_TAG((obj_loc) ? (obj_loc->oloc->addr) : HADDR_UNDEF)
+
+    /* Check if the name of the group resolved to a valid object */
+    if (obj_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
+
+    /* Delete link */
+    if (H5G_obj_remove_by_idx(obj_loc->oloc, obj_loc->path->full_path_r, udata->idx_type, udata->order,
+                              udata->n) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
+
+done:
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5L__delete_by_idx_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__delete_by_idx
+ *
+ * Purpose:     Internal routine to delete a link according to its index
+ *              within a group.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__delete_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
+                   hsize_t n)
+{
+    H5L_trav_rmbi_t udata;               /* User data for callback */
+    herr_t          ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity check */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up user data for unlink operation */
+    udata.idx_type = idx_type;
+    udata.order    = order;
+    udata.n        = n;
+
+    /* Traverse the group hierarchy to remove the link */
+    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT,
+                     H5L__delete_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "link doesn't exist")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__delete_by_idx() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__move_dest_cb
+ *
+ * Purpose:	Second callback for moving and renaming an object.  This routine
+ *              inserts a new link into the group returned by the traversal.
+ *              It is called by H5L__move_cb.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Monday, April 3, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__move_dest_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
+                  H5G_loc_t *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_mv2_t *udata  = (H5L_trav_mv2_t *)_udata; /* User data passed in */
+    H5G_t *         grp    = NULL; /* H5G_t for this group, opened to pass to user callback */
+    hid_t           grp_id = FAIL; /* ID for this group (passed to user callback */
+    H5G_loc_t       temp_loc;      /* For UD callback */
+    hbool_t         temp_loc_init = FALSE;
+    herr_t          ret_value     = SUCCEED; /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Make sure an object with this name doesn't already exist */
+    if (obj_loc != NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "an object with that name already exists")
+
+    /* Check for crossing file boundaries with a new hard link */
+    if (udata->lnk->type == H5L_TYPE_HARD)
+        /* Check that both objects are in same file */
+        if (!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "moving a link across files is not allowed")
+
+    /* Give the object its new name */
+    /* Casting away const okay -JML */
+    HDassert(udata->lnk->name == NULL);
+    udata->lnk->name = (char *)name;
+
+    /* Insert the link into the group */
+    if (H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE, H5O_TYPE_UNKNOWN, NULL) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
+
+    /* If the link was a user-defined link, call its move callback if it has one */
+    if (udata->lnk->type >= H5L_TYPE_UD_MIN) {
+        const H5L_class_t *link_class; /* User-defined link class */
+
+        /* Get the link class for this type of link. */
+        if (NULL == (link_class = H5L_find_class(udata->lnk->type)))
+            HGOTO_ERROR(H5E_LINK, H5E_NOTREGISTERED, FAIL, "link class is not registered")
+
+        if ((!udata->copy && link_class->move_func) || (udata->copy && link_class->copy_func)) {
+            H5O_loc_t  temp_oloc;
+            H5G_name_t temp_path;
+
+            /* Create a temporary location (or else H5G_open will do a shallow
+             * copy and wipe out grp_loc)
+             */
+            H5G_name_reset(&temp_path);
+            if (H5O_loc_copy_deep(&temp_oloc, grp_loc->oloc) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
+
+            temp_loc.oloc = &temp_oloc;
+            temp_loc.path = &temp_path;
+            temp_loc_init = TRUE;
+
+            /* Set up location for user-defined callback */
+            if (NULL == (grp = H5G_open(&temp_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
+            if ((grp_id = H5VL_wrap_register(H5I_GROUP, grp, TRUE)) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register group ID")
+
+            if (udata->copy) {
+                if ((link_class->copy_func)(udata->lnk->name, grp_id, udata->lnk->u.ud.udata,
+                                            udata->lnk->u.ud.size) < 0)
+                    HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "UD copy callback returned error")
+            } /* end if */
+            else {
+                if ((link_class->move_func)(udata->lnk->name, grp_id, udata->lnk->u.ud.udata,
+                                            udata->lnk->u.ud.size) < 0)
+                    HGOTO_ERROR(H5E_LINK, H5E_CALLBACK, FAIL, "UD move callback returned error")
+            } /* end else */
+        }     /* end if */
+    }         /* end if */
+
+done:
+    /* Close the location given to the user callback if it was created */
+    if (grp_id >= 0) {
+        if (H5I_dec_app_ref(grp_id) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close ID from UD callback")
+    } /* end if */
+    else if (grp != NULL) {
+        if (H5G_close(grp) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
+    } /* end if */
+    else if (temp_loc_init)
+        H5G_loc_free(&temp_loc);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    /* Reset the "name" field in udata->lnk because it is owned by traverse()
+     * and must not be manipulated after traverse closes */
+    udata->lnk->name = NULL;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__move_dest_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__move_cb
+ *
+ * Purpose:	Callback for moving and renaming an object.  This routine
+ *              replaces the names of open objects with the moved object
+ *              in the path
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Friday, April 3, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__move_cb(H5G_loc_t *grp_loc /*in*/, const char *name, const H5O_link_t *lnk, H5G_loc_t *obj_loc,
+             void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_mv_t *udata = (H5L_trav_mv_t *)_udata; /* User data passed in */
+    H5L_trav_mv2_t udata_out;                       /* User data for H5L__move_dest_cb traversal */
+    char *         orig_name   = NULL;              /* The name of the link in this group */
+    hbool_t        link_copied = FALSE;             /* Has udata_out.lnk been allocated? */
+    herr_t         ret_value   = SUCCEED;           /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name in this group resolved to a valid link */
+    if (obj_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
+
+    /* Check for operations on '.' */
+    if (lnk == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "the name of a link must be supplied to move or copy")
+
+    /* Set up user data for move_dest_cb */
+    if (NULL == (udata_out.lnk = (H5O_link_t *)H5O_msg_copy(H5O_LINK_ID, lnk, NULL)))
+        HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy link to be moved")
+
+    /* In this special case, the link's name is going to be replaced at its
+     * destination, so we should free it here.
+     */
+    udata_out.lnk->name = (char *)H5MM_xfree(udata_out.lnk->name);
+    link_copied         = TRUE;
+
+    udata_out.lnk->cset = udata->cset;
+    udata_out.file      = grp_loc->oloc->file;
+    udata_out.copy      = udata->copy;
+
+    /* Keep a copy of link's name (it's "owned" by the H5G_traverse() routine) */
+    orig_name = H5MM_xstrdup(name);
+
+    /* Reset the # of soft / UD links that can be traversed, so that the second
+     * (destination) traversal has the correct value
+     */
+    if (H5CX_set_nlinks(udata->orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't reset # of soft / UD links to traverse")
+
+    /* Insert the link into its new location */
+    if (H5G_traverse(udata->dst_loc, udata->dst_name, udata->dst_target_flags, H5L__move_dest_cb,
+                     &udata_out) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to follow symbolic link")
+
+    /* If this is a move and not a copy operation, change the object's name and remove the old link */
+    if (!udata->copy) {
+        H5RS_str_t *dst_name_r; /* Ref-counted version of dest name */
+
+        /* Make certain that the destination name is a full (not relative) path */
+        if (*(udata->dst_name) != '/') {
+            HDassert(udata->dst_loc->path->full_path_r);
+
+            /* Create reference counted string for full dst path */
+            if ((dst_name_r = H5G_build_fullpath_refstr_str(udata->dst_loc->path->full_path_r,
+                                                            udata->dst_name)) == NULL)
+                HGOTO_ERROR(H5E_LINK, H5E_PATH, FAIL, "can't build destination path name")
+        } /* end if */
+        else
+            dst_name_r = H5RS_wrap(udata->dst_name);
+        HDassert(dst_name_r);
+
+        /* Fix names up */
+        if (H5G_name_replace(lnk, H5G_NAME_MOVE, obj_loc->oloc->file, obj_loc->path->full_path_r,
+                             udata->dst_loc->oloc->file, dst_name_r) < 0) {
+            H5RS_decr(dst_name_r);
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to replace name")
+        } /* end if */
+
+        /* Remove the old link */
+        if (H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, orig_name) < 0) {
+            H5RS_decr(dst_name_r);
+            HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to remove old name")
+        } /* end if */
+
+        H5RS_decr(dst_name_r);
+    } /* end if */
+
+done:
+    /* Cleanup */
+    if (orig_name)
+        H5MM_xfree(orig_name);
+
+    /* If udata_out.lnk was copied, free any memory allocated
+     * In this special case, the H5L__move_dest_cb callback resets the name
+     * so H5O_msg_free shouldn't try to free it
+     */
+    if (link_copied)
+        H5O_msg_free(H5O_LINK_ID, udata_out.lnk);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__move_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__move
+ *
+ * Purpose:	Atomically move or copy a link.
+ *
+ *              Creates a copy of a link in a new destination with a new name.
+ *              SRC_LOC and SRC_NAME together define the link's original
+ *              location, while DST_LOC and DST_NAME together define its
+ *              final location.
+ *
+ *              If copy_flag is FALSE, the original link is removed
+ *              (effectively moving the link).
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Monday, May 1, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__move(const H5G_loc_t *src_loc, const char *src_name, const H5G_loc_t *dst_loc, const char *dst_name,
+          hbool_t copy_flag, hid_t lcpl_id)
+{
+    unsigned        dst_target_flags = H5G_TARGET_NORMAL;
+    H5T_cset_t      char_encoding    = H5F_DEFAULT_CSET; /* Character encoding for link */
+    H5P_genplist_t *lc_plist;                            /* Link creation property list */
+    H5L_trav_mv_t   udata;                               /* User data for traversal */
+    herr_t          ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity check */
+    HDassert(src_loc);
+    HDassert(dst_loc);
+    HDassert(src_name && *src_name);
+    HDassert(dst_name && *dst_name);
+
+    /* Check for flags present in creation property list */
+    if (lcpl_id != H5P_DEFAULT) {
+        unsigned crt_intmd_group;
+
+        if (NULL == (lc_plist = (H5P_genplist_t *)H5I_object(lcpl_id)))
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
+
+        /* Get intermediate group creation property */
+        if (H5CX_get_intermediate_group(&crt_intmd_group) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for creating missing groups")
+
+        /* Set target flags for source and destination */
+        if (crt_intmd_group > 0)
+            dst_target_flags |= H5G_CRT_INTMD_GROUP;
+
+        /* Get character encoding property */
+        if (H5CX_get_encoding(&char_encoding) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for character encoding")
+    } /* end if */
+
+    /* Set up user data */
+    udata.dst_loc          = dst_loc;
+    udata.dst_name         = dst_name;
+    udata.dst_target_flags = dst_target_flags;
+    udata.cset             = char_encoding;
+    udata.copy             = copy_flag;
+
+    /* Retrieve the original # of soft / UD links that can be traversed, so
+     *  that the countdown can be reset after the first path is traversed.
+     */
+    if (H5CX_get_nlinks(&udata.orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
+
+    /* Do the move */
+    if (H5G_traverse(src_loc, src_name, H5G_TARGET_MOUNT | H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__move_cb,
+                     &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to find link")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__move() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__exists_final_cb
+ *
+ * Purpose:	Callback for checking whether a link exists, as the final
+ *              component of a path
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Friday, March 16 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__exists_final_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                     const H5O_link_t *lnk, H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/,
+                     H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_le_t *udata = (H5L_trav_le_t *)_udata; /* User data passed in */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Check if the name in this group resolved to a valid link */
+    *udata->exists = (hbool_t)(lnk != NULL);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5L__exists_final_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__exists_inter_cb
+ *
+ * Purpose:	Callback for checking whether a link exists, as an intermediate
+ *              component of a path
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, December 31 2015
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__exists_inter_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                     H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_le_t *udata     = (H5L_trav_le_t *)_udata; /* User data passed in */
+    herr_t         ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name in this group resolved to a valid link */
+    if (lnk != NULL) {
+        /* Check for more components to the path */
+        if (udata->sep) {
+            H5G_traverse_t cb_func; /* Callback function for tranversal */
+            char *         next;    /* Pointer to next component name */
+
+            /* Look for another separator */
+            next = udata->sep;
+            if (NULL == (udata->sep = HDstrchr(udata->sep, '/')))
+                cb_func = H5L__exists_final_cb;
+            else {
+                /* Chew through adjacent separators, if present */
+                do {
+                    *udata->sep = '\0';
+                    udata->sep++;
+                } while ('/' == *udata->sep);
+                cb_func = H5L__exists_inter_cb;
+            } /* end else */
+            if (H5G_traverse(obj_loc, next, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, udata) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
+        } /* end if */
+        else
+            *udata->exists = TRUE;
+    } /* end if */
+    else
+        *udata->exists = FALSE;
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__exists_inter_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L_exists_tolerant
+ *
+ * Purpose:	Returns whether a link exists in a group
+ *
+ * Note:	Same as H5L__exists, except that missing links are reported
+ *		as 'FALSE' instead of causing failures
+ *
+ * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, December 31 2015
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hbool_t *exists)
+{
+    H5L_trav_le_t  udata;               /* User data for traversal */
+    H5G_traverse_t cb_func;             /* Callback function for tranversal */
+    char *         name_copy = NULL;    /* Duplicate of name */
+    char *         name_trav;           /* Name to traverse */
+    herr_t         ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity checks */
+    HDassert(loc);
+    HDassert(name);
+    HDassert(exists);
+
+    /* Copy the name and skip leading '/'s */
+    name_trav = name_copy = H5MM_strdup(name);
+    while ('/' == *name_trav)
+        name_trav++;
+
+    /* A path of "/" will always exist in a file */
+    if ('\0' == *name_trav)
+        *exists = TRUE;
+    else {
+        /* Set up user data & correct callback */
+        udata.exists = exists;
+        if (NULL == (udata.sep = HDstrchr(name_trav, '/')))
+            cb_func = H5L__exists_final_cb;
+        else {
+            /* Chew through adjacent separators, if present */
+            do {
+                *udata.sep = '\0';
+                udata.sep++;
+            } while ('/' == *udata.sep);
+            cb_func = H5L__exists_inter_cb;
+        } /* end else */
+
+        /* Traverse the group hierarchy to locate the link to check */
+        if (H5G_traverse(loc, name_trav, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, &udata) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
+    }
+
+done:
+    /* Release duplicated string */
+    H5MM_xfree(name_copy);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5L_exists_tolerant() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__exists
+ *
+ * Purpose:	Returns whether a link exists in a group
+ *
+ * Note:	Same as H5L_exists_tolerant, except that missing links are reported
+ *		as failures
+ *
+ * Return:	Non-negative on success, with *exists set/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Friday, March 16 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__exists(const H5G_loc_t *loc, const char *name, hbool_t *exists)
+{
+    H5L_trav_le_t udata;               /* User data for traversal */
+    herr_t        ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity checks */
+    HDassert(loc);
+    HDassert(name);
+    HDassert(exists);
+
+    /* A path of "/" will always exist in a file */
+    if (0 == HDstrcmp(name, "/"))
+        *exists = TRUE;
+    else {
+        /* Traverse the group hierarchy to locate the object to get info about */
+        udata.exists = exists;
+        if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__exists_final_cb, &udata) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "link doesn't exist")
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5L__exists() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_info_cb
+ *
+ * Purpose:	Callback for retrieving a link's metadata
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	James Laird
+ *              Monday, April 17 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_info_cb(H5G_loc_t *grp_loc /*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t *lnk,
+                 H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata /*in,out*/, H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gi_t *udata     = (H5L_trav_gi_t *)_udata; /* User data passed in */
+    herr_t         ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name in this group resolved to a valid link */
+    if (lnk == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
+
+    /* Get information from the link */
+    if (H5G_link_to_info(grp_loc->oloc, lnk, udata->linfo) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info")
+
+done:
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_info_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L_get_info
+ *
+ * Purpose:     Returns metadata about a link.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:	James Laird
+ *              Monday, April 17 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_get_info(const H5G_loc_t *loc, const char *name, H5L_info2_t *linfo /*out*/)
+{
+    H5L_trav_gi_t udata;               /* User data for callback */
+    herr_t        ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    udata.linfo = linfo;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name doesn't exist")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5L_get_info() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_info_by_idx_cb
+ *
+ * Purpose:	Callback for retrieving a link's metadata according to an
+ *              index's order.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November  6 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_info_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                        const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                        H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gibi_t *udata = (H5L_trav_gibi_t *)_udata; /* User data passed in */
+    H5O_link_t       fnd_lnk;                           /* Link within group */
+    hbool_t          lnk_copied = FALSE;                /* Whether the link was copied */
+    herr_t           ret_value  = SUCCEED;              /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name of the group resolved to a valid object */
+    if (obj_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
+
+    /* Query link */
+    if (H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
+    lnk_copied = TRUE;
+
+    /* Get information from the link */
+    if (H5G_link_to_info(obj_loc->oloc, &fnd_lnk, udata->linfo) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info")
+
+done:
+    /* Reset the link information, if we have a copy */
+    if (lnk_copied)
+        H5O_msg_reset(H5O_LINK_ID, &fnd_lnk);
+
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_info_by_idx_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__get_info_by_idx
+ *
+ * Purpose:     Internal routine to retrieve link info according to an
+ *              index's order.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__get_info_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type, H5_iter_order_t order,
+                     hsize_t n, H5L_info2_t *linfo /*out*/)
+{
+    H5L_trav_gibi_t udata;               /* User data for callback */
+    herr_t          ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+    HDassert(linfo);
+
+    /* Set up user data for callback */
+    udata.idx_type = idx_type;
+    udata.order    = order;
+    udata.n        = n;
+    udata.linfo    = linfo;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if (H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_info_by_idx() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_name_by_idx_cb
+ *
+ * Purpose:	Callback for retrieving a link's name according to an
+ *              index's order.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, November 11 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_name_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc /*in*/, const char H5_ATTR_UNUSED *name,
+                        const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata /*in,out*/,
+                        H5G_own_loc_t *own_loc /*out*/)
+{
+    H5L_trav_gnbi_t *udata     = (H5L_trav_gnbi_t *)_udata; /* User data passed in */
+    herr_t           ret_value = SUCCEED;                   /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check if the name of the group resolved to a valid object */
+    if (obj_loc == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
+
+    /* Query link */
+    if ((udata->name_len = H5G_obj_get_name_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n,
+                                                   udata->name, udata->size)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
+
+done:
+    /* Indicate that this callback didn't take ownership of the group *
+     * location for the object */
+    *own_loc = H5G_OWN_NONE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_name_by_idx_cb() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__get_name_by_idx
+ *
+ * Purpose:     Internal routine to retrieve link name according to an
+ *              index's order.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+ssize_t
+H5L__get_name_by_idx(const H5G_loc_t *loc, const char *group_name, H5_index_t idx_type, H5_iter_order_t order,
+                     hsize_t n, char *name /*out*/, size_t size)
+{
+    H5L_trav_gnbi_t udata;            /* User data for callback */
+    ssize_t         ret_value = FAIL; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(group_name && *group_name);
+
+    /* Set up user data for callback */
+    udata.idx_type = idx_type;
+    udata.order    = order;
+    udata.n        = n;
+    udata.name     = name;
+    udata.size     = size;
+    udata.name_len = -1;
+
+    /* Traverse the group hierarchy to locate the link to get name of */
+    if (H5G_traverse(loc, group_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_name_by_idx_cb, &udata) <
+        0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get name")
+
+    /* Set the return value */
+    ret_value = udata.name_len;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__get_name_by_idx() */
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__link_copy_file
+ *
+ * Purpose:     Copy a link and the object it points to from one file to
+ *              another.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		Sep 29 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L__link_copy_file(H5F_t *dst_file, const H5O_link_t *_src_lnk, const H5O_loc_t *src_oloc,
+                    H5O_link_t *dst_lnk, H5O_copy_t *cpy_info)
+{
+    H5O_link_t        tmp_src_lnk;                   /* Temporary copy of src link, when needed */
+    const H5O_link_t *src_lnk            = _src_lnk; /* Source link */
+    hbool_t           dst_lnk_init       = FALSE;    /* Whether the destination link is initialized */
+    hbool_t           expanded_link_open = FALSE;    /* Whether the target location has been opened */
+    H5G_loc_t         tmp_src_loc;                   /* Group location holding target object */
+    H5G_name_t        tmp_src_path;                  /* Path for target object */
+    H5O_loc_t         tmp_src_oloc;                  /* Object location for target object */
+    herr_t            ret_value = SUCCEED;           /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check arguments */
+    HDassert(dst_file);
+    HDassert(src_lnk);
+    HDassert(dst_lnk);
+    HDassert(cpy_info);
+
+    /* Expand soft or external link, if requested */
+    if ((H5L_TYPE_SOFT == src_lnk->type && cpy_info->expand_soft_link) ||
+        (H5L_TYPE_EXTERNAL == src_lnk->type && cpy_info->expand_ext_link)) {
+        H5G_loc_t  lnk_grp_loc;  /* Group location holding link */
+        H5G_name_t lnk_grp_path; /* Path for link */
+        htri_t     tar_exists;   /* Whether the target object exists */
+
+        /* Set up group location for link */
+        H5G_name_reset(&lnk_grp_path);
+        lnk_grp_loc.path = &lnk_grp_path;
+        lnk_grp_loc.oloc = (H5O_loc_t *)src_oloc; /* Casting away const OK -QAK */
+
+        /* Check if the target object exists */
+        if ((tar_exists = H5G_loc_exists(&lnk_grp_loc, src_lnk->name)) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to check if target object exists")
+
+        if (tar_exists) {
+            /* Make a temporary copy of the link, so that it will not change the
+             * info in the cache when we change it to a hard link */
+            if (NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, &tmp_src_lnk))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
+
+            /* Set up group location for target object.  Let H5G_traverse expand
+             * the link. */
+            tmp_src_loc.path = &tmp_src_path;
+            tmp_src_loc.oloc = &tmp_src_oloc;
+            if (H5G_loc_reset(&tmp_src_loc) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to reset location")
+
+            /* Find the target object */
+            if (H5G_loc_find(&lnk_grp_loc, src_lnk->name, &tmp_src_loc) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to find target object")
+            expanded_link_open = TRUE;
+
+            /* Convert symbolic link to hard link */
+            if (tmp_src_lnk.type == H5L_TYPE_SOFT)
+                tmp_src_lnk.u.soft.name = (char *)H5MM_xfree(tmp_src_lnk.u.soft.name);
+            else if (tmp_src_lnk.u.ud.size > 0)
+                tmp_src_lnk.u.ud.udata = H5MM_xfree(tmp_src_lnk.u.ud.udata);
+            tmp_src_lnk.type        = H5L_TYPE_HARD;
+            tmp_src_lnk.u.hard.addr = tmp_src_oloc.addr;
+            src_lnk                 = &tmp_src_lnk;
+        } /* end if */
+    }     /* end if */
+
+    /* Copy src link information to dst link information */
+    if (NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, dst_lnk))
+        HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
+    dst_lnk_init = TRUE;
+
+    /* Check if object in source group is a hard link & copy it */
+    if (H5L_TYPE_HARD == src_lnk->type) {
+        H5O_loc_t new_dst_oloc; /* Copied object location in destination */
+
+        /* Set up copied object location to fill in */
+        H5O_loc_reset(&new_dst_oloc);
+        new_dst_oloc.file = dst_file;
+
+        if (!expanded_link_open) {
+            /* Build temporary object location for source */
+            H5O_loc_reset(&tmp_src_oloc);
+            tmp_src_oloc.file = src_oloc->file;
+            tmp_src_oloc.addr = src_lnk->u.hard.addr;
+        } /* end if */
+        HDassert(H5F_addr_defined(tmp_src_oloc.addr));
+
+        /* Copy the shared object from source to destination */
+        /* Don't care about obj_type or udata because those are only important
+         * for old style groups */
+        if (H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, cpy_info, TRUE, NULL, NULL) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object")
+
+        /* Copy new destination object's information for eventual insertion */
+        dst_lnk->u.hard.addr = new_dst_oloc.addr;
+    } /* end if */
+
+done:
+    /* Check if we used a temporary src link */
+    if (src_lnk != _src_lnk) {
+        HDassert(src_lnk == &tmp_src_lnk);
+        H5O_msg_reset(H5O_LINK_ID, &tmp_src_lnk);
+    } /* end if */
+    if (ret_value < 0)
+        if (dst_lnk_init)
+            H5O_msg_reset(H5O_LINK_ID, dst_lnk);
+    /* Check if we need to free the temp source oloc */
+    if (expanded_link_open)
+        if (H5G_loc_free(&tmp_src_loc) < 0)
+            HDONE_ERROR(H5E_LINK, H5E_CANTFREE, FAIL, "unable to free object")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L__link_copy_file() */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L_iterate
+ *
+ * Purpose:     Iterates through links in a group
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5L_iterate(H5G_loc_t *loc, const char *group_name, H5_index_t idx_type, H5_iter_order_t order,
+            hsize_t *idx_p, H5L_iterate2_t op, void *op_data)
+{
+    H5G_link_iterate_t lnk_op;           /* Link operator                    */
+    hsize_t            last_lnk;         /* Index of last object looked at   */
+    hsize_t            idx;              /* Internal location to hold index  */
+    herr_t             ret_value = FAIL; /* Return value                     */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(loc);
+    HDassert(group_name);
+    HDassert(op);
+
+    /* Set up iteration beginning/end info */
+    idx      = (idx_p == NULL ? 0 : *idx_p);
+    last_lnk = 0;
+
+    /* Build link operator info */
+    lnk_op.op_type        = H5G_LINK_OP_NEW;
+    lnk_op.op_func.op_new = op;
+
+    /* Iterate over the links */
+    if ((ret_value = H5G_iterate(loc, group_name, idx_type, order, idx, &last_lnk, &lnk_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link iteration failed")
+
+    /* Set the index we stopped at */
+    if (idx_p)
+        *idx_p = last_lnk;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5L_iterate() */
diff --git a/src/H5Lprivate.h b/src/H5Lprivate.h
index 740fc1e..b114c17 100644
--- a/src/H5Lprivate.h
+++ b/src/H5Lprivate.h
@@ -123,6 +123,7 @@ H5_DLL herr_t H5L_iterate(H5G_loc_t *loc, const char *group_name, H5_index_t idx
 /* User-defined link functions */
 H5_DLL herr_t H5L_register(const H5L_class_t *cls);
 H5_DLL herr_t H5L_unregister(H5L_type_t id);
+H5_DLL herr_t H5L_is_registered(H5L_type_t id, hbool_t *is_registered);
 H5_DLL const H5L_class_t *H5L_find_class(H5L_type_t id);
 
 #endif /* H5Lprivate_H */
diff --git a/src/Makefile.am b/src/Makefile.am
index 6d5a56e..51d847f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -76,7 +76,7 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5lib_settings.c H5system.c \
         H5HL.c H5HLcache.c H5HLdbg.c H5HLint.c H5HLprfx.c H5HLdblk.c \
         H5HP.c \
         H5I.c H5Idbg.c H5Iint.c H5Itest.c \
-        H5L.c H5Ldeprec.c H5Lexternal.c \
+        H5L.c H5Ldeprec.c H5Lexternal.c H5Lint.c \
         H5M.c \
         H5MF.c H5MFaggr.c H5MFdbg.c H5MFsection.c \
         H5MM.c H5MP.c H5MPtest.c \