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hdf5/src/H5Gobj.c
Quincey Koziol c04a55d65e [svn-r13796] Description: 
Clean up ISOHM code further and get rid of several non-optimal ways
of working with object headers.

Tested on:
	FreeBSD/32 6.2 (duty)
	Mac OS X/32 10.4.9 (amazon)
2007-05-22 21:16:41 -05:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Gobj.c
* Sep 5 2005
* Quincey Koziol <koziol@ncsa.uiuc.edu>
*
* Purpose: Functions for abstract handling of objects in groups.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
#define H5G_PACKAGE /*suppress error about including H5Gpkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5Gpkg.h" /* Groups */
#include "H5HLprivate.h" /* Local Heaps */
#include "H5Iprivate.h" /* IDs */
#include "H5Lprivate.h" /* Links */
#include "H5MMprivate.h" /* Memory management */
#include "H5Pprivate.h" /* Property Lists */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/* User data for object header iterator when converting link messages to dense
* link storage
*/
typedef struct {
H5F_t *f; /* Pointer to file for insertion */
hid_t dxpl_id; /* DXPL during insertion */
H5O_linfo_t *linfo; /* Pointer to link info */
} H5G_obj_oh_it_ud1_t;
/* User data for link iterator when converting dense link storage to link
* messages
*/
typedef struct {
H5O_link_t *lnk_table; /* Array of links to convert */
size_t nlinks; /* Number of links converted */
size_t alloc_links; /* Size of link table */
} H5G_obj_lnk_it_ud1_t;
/* User data for symbol table iterator when converting old-format group to
* a new-format group
*/
typedef struct {
const H5O_loc_t *grp_oloc; /* Pointer to group for insertion */
hid_t dxpl_id; /* DXPL during insertion */
} H5G_obj_stab_it_ud1_t;
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
static herr_t H5G_obj_compact_to_dense_cb(const void *_mesg, unsigned idx,
void *_udata);
static herr_t H5G_obj_remove_update_linfo(H5O_loc_t *oloc, H5O_linfo_t *linfo,
hid_t dxpl_id);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5G_obj_create
*
* Purpose: Create an object header for a group and update object location info
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sep 29 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_create(H5F_t *f, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
const H5O_linfo_t *linfo, hid_t gcpl_id, H5O_loc_t *oloc/*out*/)
{
size_t hdr_size; /* Size of object header to request */
hbool_t use_latest_format; /* Flag indicating the new group format should be used */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_create, FAIL)
/*
* Check arguments.
*/
HDassert(f);
HDassert(ginfo);
HDassert(oloc);
/* Check for using the latest version of the group format */
/* (add more checks for creating "new format" groups when needed) */
if(H5F_USE_LATEST_FORMAT(f) || linfo->track_corder)
use_latest_format = TRUE;
else
use_latest_format = FALSE;
/* Make certain that the creation order is being tracked if an index is
* going to be built on it.
*/
if(linfo->index_corder && !linfo->track_corder)
HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "must track creation order to create index for it")
/* Check if we should be using the latest version of the group format */
if(use_latest_format) {
H5O_link_t lnk; /* Temporary link message info for computing message size */
char null_char = '\0'; /* Character for creating null string */
size_t ginfo_size; /* Size of the group info message */
size_t linfo_size; /* Size of the link info message */
size_t link_size; /* Size of a link message */
/* Calculate message size infomation, for creating group's object header */
linfo_size = H5O_msg_size_f(f, gcpl_id, H5O_LINFO_ID, linfo, (size_t)0);
HDassert(linfo_size);
ginfo_size = H5O_msg_size_f(f, gcpl_id, H5O_GINFO_ID, ginfo, (size_t)0);
HDassert(ginfo_size);
lnk.type = H5L_TYPE_HARD;
lnk.corder = 0;
lnk.corder_valid = linfo->track_corder;
lnk.cset = H5T_CSET_ASCII;
lnk.name = &null_char;
link_size = H5O_msg_size_f(f, gcpl_id, H5O_LINK_ID, &lnk, (size_t)ginfo->est_name_len);
HDassert(link_size);
/* Compute size of header to use for creation */
hdr_size = linfo_size +
ginfo_size +
(ginfo->est_num_entries * link_size);
} /* end if */
else
hdr_size = 4 + 2 * H5F_SIZEOF_ADDR(f);
/*
* Create group's object header. It has a zero link count
* since nothing refers to it yet. The link count will be
* incremented if the object is added to the group directed graph.
*/
if(H5O_create(f, dxpl_id, hdr_size, gcpl_id, oloc/*out*/) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create header")
/* Check for format of group to create */
if(use_latest_format) {
/* Insert link info message */
if(H5O_msg_create(oloc, H5O_LINFO_ID, 0, 0, linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
/* Insert group info message */
if(H5O_msg_create(oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, H5O_UPDATE_TIME, ginfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
} /* end if */
else {
H5O_stab_t stab; /* Symbol table message */
/* The group doesn't currently have a 'stab' message, go create one */
if(H5G_stab_create(oloc, dxpl_id, ginfo, &stab) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create symbol table")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_create() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_ent_decode
*
* Purpose: Decodes a symbol table entry into a object location
*
* Return: Success: Non-negative with *pp pointing to the first byte
* following the symbol table entry.
*
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sep 26 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_ent_decode(H5F_t *f, const uint8_t **pp, H5O_loc_t *oloc)
{
const uint8_t *p_ret = *pp;
FUNC_ENTER_NOAPI_NOFUNC(H5G_obj_ent_decode)
/* check arguments */
HDassert(f);
HDassert(pp);
HDassert(oloc);
/* Set file pointer for root object location */
oloc->file = f;
oloc->holding_file = FALSE;
/* decode header */
*pp += H5F_SIZEOF_SIZE(f); /* Skip over local heap address */
H5F_addr_decode(f, pp, &(oloc->addr));
*pp += 4; /* Skip over "cache type" */
*pp += 4; /* Reserved */
/* Set decode pointer */
*pp = p_ret + H5G_SIZEOF_ENTRY(f);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_obj_ent_decode() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_ent_encode
*
* Purpose: Encodes the specified object location into a symbol table
* entry in the buffer pointed to by *pp.
*
* Return: Success: Non-negative, with *pp pointing to the first byte
* after the symbol table entry.
*
* Failure: Negative
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sep 26 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_ent_encode(const H5F_t *f, uint8_t **pp, const H5O_loc_t *oloc)
{
uint8_t *p_ret = *pp + H5G_SIZEOF_ENTRY(f);
FUNC_ENTER_NOAPI_NOFUNC(H5G_obj_ent_encode)
/* check arguments */
HDassert(f);
HDassert(pp);
/* encode header */
H5F_ENCODE_LENGTH(f, *pp, 0); /* No name for root group */
if(oloc)
H5F_addr_encode(f, pp, oloc->addr);
else
H5F_addr_encode(f, pp, HADDR_UNDEF);
UINT32ENCODE(*pp, H5G_NOTHING_CACHED);
UINT32ENCODE(*pp, 0); /*reserved*/
/* fill with zero */
while(*pp < p_ret)
*(*pp)++ = 0;
*pp = p_ret;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_obj_ent_encode() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_get_linfo
*
* Purpose: Retrieves the "link info" message for an object. Also
* sets the number of links correctly, if it isn't set up yet.
*
* Return: Success: Ptr to message in native format.
* Failure: NULL
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Mar 11 2007
*
*-------------------------------------------------------------------------
*/
H5O_linfo_t *
H5G_obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
{
H5O_linfo_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_get_linfo, NULL)
/* check arguments */
HDassert(grp_oloc);
/* Retrieve the "link info" structure */
if((ret_value = H5O_msg_read(grp_oloc, H5O_LINFO_ID, linfo, dxpl_id))) {
/* Check if we don't know how many links there are */
if(ret_value->nlinks == HSIZET_MAX) {
/* Check if we are using "dense" link storage */
if(H5F_addr_defined(ret_value->fheap_addr)) {
/* Retrieve # of records in "name" B-tree */
/* (should be same # of records in all indices) */
if(H5B2_get_nrec(grp_oloc->file, dxpl_id, H5G_BT2_NAME, ret_value->name_bt2_addr, &ret_value->nlinks) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "can't retrieve # of records in index")
} /* end if */
else {
/* Retrieve # of links from object header */
if(H5O_get_nlinks(grp_oloc, dxpl_id, &ret_value->nlinks) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "can't retrieve # of links for object")
} /* end if */
} /* end if */
} /* end if */
else
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "link info message not present")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_get_linfo() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_compact_to_dense_cb
*
* Purpose: Callback routine for converting "compact" to "dense"
* link storage form.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Aug 30 2005
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_obj_compact_to_dense_cb(const void *_mesg, unsigned UNUSED idx, void *_udata)
{
const H5O_link_t *lnk = (const H5O_link_t *)_mesg; /* Pointer to link */
H5G_obj_oh_it_ud1_t *udata = (H5G_obj_oh_it_ud1_t *)_udata; /* 'User data' passed in */
herr_t ret_value = H5_ITER_CONT; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_obj_compact_to_dense_cb)
/* check arguments */
HDassert(lnk);
HDassert(udata);
/* Insert link into dense link storage */
if(H5G_dense_insert(udata->f, udata->dxpl_id, udata->linfo, lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into dense storage")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_compact_to_dense_cb() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_stab_to_new_cb
*
* Purpose: Callback routine for converting "symbol table" link storage to
* "new format" storage (either "compact" or "dense" storage).
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Sept 16 2006
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_obj_stab_to_new_cb(const H5O_link_t *lnk, void *_udata)
{
H5G_obj_stab_it_ud1_t *udata = (H5G_obj_stab_it_ud1_t *)_udata; /* 'User data' passed in */
herr_t ret_value = H5_ITER_CONT; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_obj_stab_to_new_cb)
/* check arguments */
HDassert(lnk);
HDassert(udata);
/* Insert link into group */
/* (Casting away const OK - QAK) */
if(H5G_obj_insert(udata->grp_oloc, lnk->name, (H5O_link_t *)lnk, FALSE, udata->dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert link into group")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_stab_to_new_cb() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_insert
*
* Purpose: Insert a new symbol into the group described by GRP_OLOC.
* file F. The name of the new symbol is NAME and its symbol
* table entry is OBJ_LNK. Increment the reference
* count for the object the link points if OBJ_LNK is a hard link
* and ADJ_LINK is true.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sep 6 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
hbool_t adj_link, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
hbool_t use_old_format; /* Whether to use 'old format' (symbol table) for insertions or not */
hbool_t use_new_dense = FALSE; /* Whether to use "dense" form of 'new format' group */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_insert, FAIL)
/* check arguments */
HDassert(grp_oloc && grp_oloc->file);
HDassert(name && *name);
HDassert(obj_lnk);
/* Check if we have information about the number of objects in this group */
/* (by attempting to get the link info message for this group) */
if(H5G_obj_get_linfo(grp_oloc, &linfo, dxpl_id)) {
H5O_ginfo_t ginfo; /* Group info message */
size_t link_msg_size; /* Size of new link message in the file */
/* Using the new format for groups */
use_old_format = FALSE;
/* Check for tracking creation order on this group's links */
if(linfo.track_corder) {
/* Set the creation order for the new link & indicate that it's valid */
obj_lnk->corder = linfo.max_corder;
obj_lnk->corder_valid = TRUE;
/* Increment the max. creation order used in the group */
linfo.max_corder++;
} /* end if */
/* Get the link's message size */
if((link_msg_size = H5O_msg_raw_size(grp_oloc->file, H5O_LINK_ID, FALSE, obj_lnk)) == 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTGETSIZE, FAIL, "can't get link size")
/* Get the group info */
if(NULL == H5O_msg_read(grp_oloc, H5O_GINFO_ID, &ginfo, dxpl_id))
HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get group info")
/* If there's still a small enough number of links, use the 'link' message */
/* (If the encoded form of the link is too large to fit into an object
* header message, convert to using dense link storage instead of link messages)
*/
if(H5F_addr_defined(linfo.fheap_addr))
use_new_dense = TRUE;
else if(linfo.nlinks < ginfo.max_compact && link_msg_size < H5O_MESG_MAX_SIZE)
use_new_dense = FALSE;
else {
H5G_obj_oh_it_ud1_t udata; /* User data for iteration */
H5O_mesg_operator_t op; /* Message operator */
/* The group doesn't currently have "dense" storage for links */
if(H5G_dense_create(grp_oloc->file, dxpl_id, &linfo) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create 'dense' form of new format group")
/* Set up user data for object header message iteration */
udata.f = grp_oloc->file;
udata.dxpl_id = dxpl_id;
udata.linfo = &linfo;
/* Iterate over the 'link' messages, inserting them into the dense link storage */
op.op_type = H5O_MESG_OP_APP;
op.u.app_op = H5G_obj_compact_to_dense_cb;
if(H5O_msg_iterate(grp_oloc, H5O_LINK_ID, &op, &udata, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over links")
/* Remove all the 'link' messages */
if(H5O_msg_remove(grp_oloc, H5O_LINK_ID, H5O_ALL, FALSE, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link messages")
use_new_dense = TRUE;
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Check for new-style link information */
if(obj_lnk->cset != H5T_CSET_ASCII || obj_lnk->type > H5L_TYPE_BUILTIN_MAX) {
H5O_linfo_t new_linfo = H5G_CRT_LINK_INFO_DEF; /* Link information */
H5O_ginfo_t new_ginfo = H5G_CRT_GROUP_INFO_DEF; /* Group information */
H5G_obj_stab_it_ud1_t udata; /* User data for iteration */
H5G_link_iterate_t lnk_op; /* Link operator */
/* Convert group to "new format" group, in order to hold the information */
/* Insert link info message */
if(H5O_msg_create(grp_oloc, H5O_LINFO_ID, 0, 0, &new_linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
/* Insert group info message */
if(H5O_msg_create(grp_oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, H5O_UPDATE_TIME, &new_ginfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
/* Set up user data for iteration */
udata.grp_oloc = grp_oloc;
udata.dxpl_id = dxpl_id;
/* Build iterator operator */
lnk_op.op_type = H5G_LINK_OP_LIB;
lnk_op.u.lib_op = H5G_obj_stab_to_new_cb;
/* Iterate through all links in "old format" group and insert them into new format */
if(H5G_stab_iterate(grp_oloc, dxpl_id, H5_ITER_NATIVE, (hsize_t)0, NULL, (hid_t)0, &lnk_op, &udata) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over old format links")
/* Remove the symbol table message from the group */
if(H5O_msg_remove(grp_oloc, H5O_STAB_ID, 0, FALSE, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete old format link storage")
/* Recursively call this routine to insert the new link, since the
* group is in the "new format" now and the link info should be
* set up, etc.
*/
if(H5G_obj_insert(grp_oloc, name, obj_lnk, adj_link, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into group")
/* Done with insertion now */
HGOTO_DONE(SUCCEED)
} /* end if */
else
use_old_format = TRUE;
} /* end if */
/* Insert into symbol table or "dense" storage */
if(use_old_format) {
/* Insert into symbol table */
if(H5G_stab_insert(grp_oloc, name, obj_lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert entry into symbol table")
} /* end if */
else {
if(use_new_dense) {
/* Insert into dense link storage */
if(H5G_dense_insert(grp_oloc->file, dxpl_id, &linfo, obj_lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into dense storage")
} /* end if */
else {
/* Insert with link message */
if(H5G_compact_insert(grp_oloc, obj_lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link as link message")
} /* end else */
} /* end else */
/* Increment the number of objects in this group */
if(!use_old_format) {
linfo.nlinks++;
if(H5O_msg_write(grp_oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, &linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't update link info message")
} /* end if */
/* Increment link count on object, if requested and it's a hard link */
if(adj_link && obj_lnk->type == H5L_TYPE_HARD) {
H5O_loc_t obj_oloc; /* Object location */
H5O_loc_reset(&obj_oloc);
/* Create temporary object location */
obj_oloc.file = grp_oloc->file;
obj_oloc.addr = obj_lnk->u.hard.addr;
/* Increment reference count for object */
if(H5O_link(&obj_oloc, 1, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_LINKCOUNT, FAIL, "unable to increment hard link count")
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_insert() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_iterate
*
* Purpose: Private function for H5Giterate.
* Iterates over objects in a group
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Quincey Koziol
* Oct 3, 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_iterate(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
H5G_link_iterate_t *lnk_op, void *op_data, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
hid_t gid = -1; /* ID of group to iterate over */
H5G_t *grp; /* Pointer to group data structure to iterate over */
herr_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_iterate, FAIL)
/* Sanity check */
HDassert(group_name);
HDassert(last_lnk);
HDassert(lnk_op && lnk_op->u.lib_op);
/*
* Open the group on which to operate. We also create a group ID which
* we can pass to the application-defined operator.
*/
if((gid = H5Gopen(loc_id, group_name)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
if((grp = H5I_object(gid)) == NULL)
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "bad group ID")
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(&(grp->oloc), &linfo, dxpl_id)) {
/* Check for going out of bounds */
if(skip > 0 && (size_t)skip >= linfo.nlinks)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "index out of bound")
/* Check for creation order tracking, if creation order index lookup requested */
if(idx_type == H5_INDEX_CRT_ORDER) {
/* Check if creation order is tracked */
if(!linfo.track_corder)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "creation order not tracked for links in group")
} /* end if */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Iterate over the links in the group, building a table of the link messages */
if((ret_value = H5G_dense_iterate(grp->oloc.file, dxpl_id, &linfo, idx_type, order, skip, last_lnk, gid, lnk_op, op_data)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
} /* end if */
else {
/* Get the object's name from the link messages */
if((ret_value = H5G_compact_iterate(&(grp->oloc), dxpl_id, &linfo, idx_type, order, skip, last_lnk, gid, lnk_op, op_data)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't iterate over links")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Can only perform name lookups on groups with symbol tables */
if(idx_type != H5_INDEX_NAME)
HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
/* Iterate over symbol table */
if((ret_value = H5G_stab_iterate(&(grp->oloc), dxpl_id, order, skip, last_lnk, gid, lnk_op, op_data)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't iterate over symbol table")
} /* end else */
done:
if(gid > 0)
H5I_dec_ref(gid); /*also closes 'grp'*/
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_iterate() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_info
*
* Purpose: Retrieve information about a group
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Nov 27 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_info(H5O_loc_t *oloc, H5G_info_t *grp_info, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_info, FAIL)
/* Sanity check */
HDassert(oloc);
HDassert(grp_info);
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(oloc, &linfo, dxpl_id)) {
/* Retrieve the information about the links */
grp_info->nlinks = linfo.nlinks;
grp_info->max_corder = linfo.max_corder;
/* Check if the group is using compact or dense storage for its links */
if(H5F_addr_defined(linfo.fheap_addr))
grp_info->storage_type = H5G_STORAGE_TYPE_DENSE;
else
grp_info->storage_type = H5G_STORAGE_TYPE_COMPACT;
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Get the number of objects in this group by iterating over symbol table */
if(H5G_stab_count(oloc, &grp_info->nlinks, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "can't count objects")
/* Set the other information about the group */
grp_info->storage_type = H5G_STORAGE_TYPE_SYMBOL_TABLE;
grp_info->max_corder = 0;
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_info() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_get_name_by_idx
*
* Purpose: Private function for H5Gget_objname_by_idx.
* Returns the name of objects in the group by giving index.
*
* Return: Success: Non-negative, length of name
* Failure: Negative
*
* Programmer: Raymond Lu
* Nov 20, 2002
*
*-------------------------------------------------------------------------
*/
ssize_t
H5G_obj_get_name_by_idx(H5O_loc_t *oloc, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, char* name, size_t size, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
ssize_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_get_name_by_idx, FAIL)
/* Sanity check */
HDassert(oloc && oloc->file);
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(oloc, &linfo, dxpl_id)) {
/* Check for creation order tracking, if creation order index lookup requested */
if(idx_type == H5_INDEX_CRT_ORDER) {
/* Check if creation order is tracked */
if(!linfo.track_corder)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "creation order not tracked for links in group")
} /* end if */
/* Check for dense link storage */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Get the object's name from the dense link storage */
if((ret_value = H5G_dense_get_name_by_idx(oloc->file, dxpl_id, &linfo, idx_type, order, n, name, size)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
} /* end if */
else {
/* Get the object's name from the link messages */
if((ret_value = H5G_compact_get_name_by_idx(oloc, dxpl_id, &linfo, idx_type, order, n, name, size)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Can only perform name lookups on groups with symbol tables */
if(idx_type != H5_INDEX_NAME)
HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
/* Get the object's name from the symbol table */
if((ret_value = H5G_stab_get_name_by_idx(oloc, order, n, name, size, dxpl_id)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_get_name_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_get_type_by_idx
*
* Purpose: Private function for H5Gget_objtype_by_idx.
* Returns the type of objects in the group by giving index.
*
* Return: Success: H5G_GROUP(1), H5G_DATASET(2), H5G_TYPE(3)
*
* Failure: Negative
*
* Programmer: Raymond Lu
* Nov 20, 2002
*
*-------------------------------------------------------------------------
*/
H5G_obj_t
H5G_obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
H5G_obj_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_get_type_by_idx, H5G_UNKNOWN)
/* Sanity check */
HDassert(oloc);
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(oloc, &linfo, dxpl_id)) {
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Get the object's name from the dense link storage */
if((ret_value = H5G_dense_get_type_by_idx(oloc->file, dxpl_id, &linfo, idx)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
} /* end if */
else {
/* Get the object's type from the link messages */
if((ret_value = H5G_compact_get_type_by_idx(oloc, dxpl_id, &linfo, idx)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Get the object's type from the symbol table */
if((ret_value = H5G_stab_get_type_by_idx(oloc, idx, dxpl_id)) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_get_type_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_remove_update_linfo
*
* Purpose: Update the link info after removing a link from a group
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Nov 14, 2006
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_obj_remove_update_linfo(H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_obj_remove_update_linfo)
/* Sanity check */
HDassert(oloc);
HDassert(linfo);
/* Decrement # of links in group */
linfo->nlinks--;
/* Reset the creation order min/max if there's no more links in group */
if(linfo->nlinks == 0)
linfo->max_corder = 0;
/* Check for transitioning out of dense storage, if we are using it */
if(H5F_addr_defined(linfo->fheap_addr)) {
/* Check if there's no more links */
if(linfo->nlinks == 0) {
/* Delete the dense storage */
if(H5G_dense_delete(oloc->file, dxpl_id, linfo, FALSE) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete dense link storage")
} /* end if */
/* Check for switching back to compact storage */
else {
H5O_ginfo_t ginfo; /* Group info message */
/* Get the group info */
if(NULL == H5O_msg_read(oloc, H5O_GINFO_ID, &ginfo, dxpl_id))
HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get group info")
/* Check if we should switch from dense storage back to link messages */
if(linfo->nlinks < ginfo.min_dense) {
struct H5O_t *oh = NULL; /* Pointer to group's object header */
H5G_link_table_t ltable; /* Table of links */
hbool_t can_convert = TRUE; /* Whether converting to link messages is possible */
size_t u; /* Local index */
/* Build the table of links for this group */
if(H5G_dense_build_table(oloc->file, dxpl_id, linfo, H5_INDEX_NAME, H5_ITER_NATIVE, &ltable) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
/* Get a pointer to the object header itself */
if((oh = H5O_protect(oloc, dxpl_id)) == NULL)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to protect dataset object header")
/* Inspect links in table for ones that can't be converted back
* into link message form (currently only links which can't fit
* into an object header message)
*/
for(u = 0; u < linfo->nlinks; u++)
if(H5O_msg_size_oh(oloc->file, oh, H5O_LINK_ID, &(ltable.lnks[u]), (size_t)0) >= H5O_MESG_MAX_SIZE) {
can_convert = FALSE;
break;
} /* end if */
/* If ok, insert links as link messages */
if(can_convert) {
/* Insert link messages into group */
for(u = 0; u < linfo->nlinks; u++)
if(H5O_msg_append(oloc->file, dxpl_id, oh, H5O_LINK_ID, 0, H5O_UPDATE_TIME, &(ltable.lnks[u])) < 0) {
/* Release object header */
if(H5O_unprotect(oloc, oh) < 0)
HDONE_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to unprotect dataset object header")
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
} /* end if */
/* Remove the dense storage */
if(H5G_dense_delete(oloc->file, dxpl_id, linfo, FALSE) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete dense link storage")
} /* end if */
/* Release object header */
if(H5O_unprotect(oloc, oh) < 0)
HDONE_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to unprotect dataset object header")
/* Free link table information */
if(H5G_link_release_table(&ltable) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
} /* end if */
} /* end else */
} /* end if */
/* Update link info in the object header */
if(H5O_msg_write(oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't update link info message")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_remove_update_linfo() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_remove
*
* Purpose: Remove a link from a group.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Sep 19, 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_remove(H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r, const char *name, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
hbool_t use_old_format; /* Whether to use 'old format' (symbol table) for deletion or not */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_remove, FAIL)
/* Sanity check */
HDassert(oloc);
HDassert(name && *name);
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(oloc, &linfo, dxpl_id)) {
/* Using the new format for groups */
use_old_format = FALSE;
/* Check for dense or compact storage */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Remove object from the dense link storage */
if(H5G_dense_remove(oloc->file, dxpl_id, &linfo, grp_full_path_r, name) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end if */
else {
/* Remove object from the link messages */
if(H5G_compact_remove(oloc, dxpl_id, grp_full_path_r, name) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Using the old format for groups */
use_old_format = TRUE;
/* Remove object from the symbol table */
if(H5G_stab_remove(oloc, dxpl_id, grp_full_path_r, name) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end else */
/* Update link info for a new-style group */
if(!use_old_format)
if(H5G_obj_remove_update_linfo(oloc, &linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTUPDATE, FAIL, "unable to update link info")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_remove() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_remove_by_idx
*
* Purpose: Remove a link from a group, according to the order within an index.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Nov 14, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_remove_by_idx(H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
hbool_t use_old_format; /* Whether to use 'old format' (symbol table) for deletion or not */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_remove_by_idx, FAIL)
/* Sanity check */
HDassert(grp_oloc && grp_oloc->file);
/* Attempt to get the link info for this group */
if(H5G_obj_get_linfo(grp_oloc, &linfo, dxpl_id)) {
/* Check for creation order tracking, if creation order index lookup requested */
if(idx_type == H5_INDEX_CRT_ORDER) {
/* Check if creation order is tracked */
if(!linfo.track_corder)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "creation order not tracked for links in group")
} /* end if */
/* Using the new format for groups */
use_old_format = FALSE;
/* Check for dense or compact storage */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Remove object from the dense link storage */
if(H5G_dense_remove_by_idx(grp_oloc->file, dxpl_id, &linfo, grp_full_path_r, idx_type, order, n) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end if */
else {
/* Remove object from compact link storage */
if(H5G_compact_remove_by_idx(grp_oloc, dxpl_id, &linfo, grp_full_path_r, idx_type, order, n) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Can only perform name lookups on groups with symbol tables */
if(idx_type != H5_INDEX_NAME)
HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
/* Using the old format for groups */
use_old_format = TRUE;
/* Remove object from the symbol table */
if(H5G_stab_remove_by_idx(grp_oloc, dxpl_id, grp_full_path_r, order, n) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
} /* end else */
/* Update link info for a new-style group */
if(!use_old_format) {
if(H5G_obj_remove_update_linfo(grp_oloc, &linfo, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTUPDATE, FAIL, "unable to update link info")
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_remove() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_lookup
*
* Purpose: Look up a link in a group, using the name as the key.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Sep 26 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_lookup(H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk,
hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_lookup, FAIL)
/* check arguments */
HDassert(grp_oloc && grp_oloc->file);
HDassert(name && *name);
/* Attempt to get the link info message for this group */
if(H5G_obj_get_linfo(grp_oloc, &linfo, dxpl_id)) {
/* Check for dense link storage */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Get the object's info from the dense link storage */
if(H5G_dense_lookup(grp_oloc->file, dxpl_id, &linfo, name, lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end if */
else {
/* Get the object's info from the link messages */
if(H5G_compact_lookup(grp_oloc, name, lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Get the object's info from the symbol table */
if(H5G_stab_lookup(grp_oloc, name, lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_lookup() */
/*-------------------------------------------------------------------------
* Function: H5G_obj_lookup_by_idx
*
* Purpose: Look up link info in a group, according to an order within an
* index.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Nov 6 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_obj_lookup_by_idx(H5O_loc_t *grp_oloc, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, H5O_link_t *lnk, hid_t dxpl_id)
{
H5O_linfo_t linfo; /* Link info message */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_obj_lookup_by_idx, FAIL)
/* check arguments */
HDassert(grp_oloc && grp_oloc->file);
/* Attempt to get the link info message for this group */
if(H5G_obj_get_linfo(grp_oloc, &linfo, dxpl_id)) {
/* Check for creation order tracking, if creation order index lookup requested */
if(idx_type == H5_INDEX_CRT_ORDER) {
/* Check if creation order is tracked */
if(!linfo.track_corder)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "creation order not tracked for links in group")
} /* end if */
/* Check for dense link storage */
if(H5F_addr_defined(linfo.fheap_addr)) {
/* Get the link from the dense storage */
if(H5G_dense_lookup_by_idx(grp_oloc->file, dxpl_id, &linfo, idx_type, order, n, lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end if */
else {
/* Get the link from the link messages */
if(H5G_compact_lookup_by_idx(grp_oloc, dxpl_id, &linfo, idx_type, order, n, lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end else */
} /* end if */
else {
/* Clear error stack from not finding the link info message */
H5E_clear_stack(NULL);
/* Can only perform name lookups on groups with symbol tables */
if(idx_type != H5_INDEX_NAME)
HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
/* Get the object's info from the symbol table */
if(H5G_stab_lookup_by_idx(grp_oloc, order, n, lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_obj_lookup_by_idx() */
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