diff options
Diffstat (limited to 'src/H5Rint.c')
| -rw-r--r-- | src/H5Rint.c | 1856 |
1 files changed, 1414 insertions, 442 deletions
diff --git a/src/H5Rint.c b/src/H5Rint.c index 07efae2..e33eecb 100644 --- a/src/H5Rint.c +++ b/src/H5Rint.c @@ -35,11 +35,73 @@ #include "H5Sprivate.h" /* Dataspaces */ #include "H5Tprivate.h" /* Datatypes */ - /****************/ /* Local Macros */ /****************/ +#define H5R_MAX_STRING_LEN (1 << 16) /* Max encoded string length */ + +/* Encode macro */ +#define H5R_ENCODE(func, val, buf, buf_size, actual, m) do {\ + size_t __nalloc = buf_size; \ + if(func(val, buf, &__nalloc) < 0) \ + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, m) \ + if(buf && buf_size >= __nalloc) { \ + buf += __nalloc; \ + buf_size -= __nalloc; \ + } \ + actual += __nalloc; \ +} while(0) + +#define H5R_ENCODE_VAR(func, var, size, buf, buf_size, actual, m) do { \ + size_t __nalloc = buf_size; \ + if(func(var, size, buf, &__nalloc) < 0) \ + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, m) \ + if(buf && buf_size >= __nalloc) { \ + p += __nalloc; \ + buf_size -= __nalloc; \ + } \ + actual += __nalloc; \ +} while(0) + +/* Decode macro */ +#define H5R_DECODE(func, val, buf, buf_size, actual, m) do {\ + size_t __nbytes = buf_size; \ + if(func(buf, &__nbytes, val) < 0) \ + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, m) \ + buf += __nbytes; \ + buf_size -= __nbytes; \ + actual += __nbytes; \ +} while(0) + +#define H5R_DECODE_VAR(func, var, size, buf, buf_size, actual, m) do { \ + size_t __nbytes = buf_size; \ + if(func(buf, &__nbytes, var, size) < 0) \ + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, m) \ + p += __nbytes; \ + buf_size -= __nbytes; \ + actual += __nbytes; \ +} while(0) + +/* Debug */ +//#define H5R_DEBUG +#ifdef H5R_DEBUG +#define H5R_LOG_DEBUG(...) do { \ + HDfprintf(stdout, " # %s(): ", __func__); \ + HDfprintf(stdout, __VA_ARGS__); \ + HDfprintf(stdout, "\n"); \ + HDfflush(stdout); \ + } while (0) +static const char * +H5R__print_token(const H5VL_token_t token) { + static char string[64]; + HDsnprintf(string, 64, "%zu", *(haddr_t *)token); + return string; +} +#else +#define H5R_LOG_DEBUG(...) do { } while (0) +#endif + /******************/ /* Local Typedefs */ /******************/ @@ -48,6 +110,13 @@ /* Local Prototypes */ /********************/ +static herr_t H5R__encode_obj_token(const H5VL_token_t *obj_token, size_t token_size, unsigned char *buf, size_t *nalloc); +static herr_t H5R__decode_obj_token(const unsigned char *buf, size_t *nbytes, H5VL_token_t *obj_token, uint8_t *token_size); +static herr_t H5R__encode_region(H5S_t *space, unsigned char *buf, size_t *nalloc); +static herr_t H5R__decode_region(const unsigned char *buf, size_t *nbytes, H5S_t **space_ptr); +static herr_t H5R__encode_string(const char *string, unsigned char *buf, size_t *nalloc); +static herr_t H5R__decode_string(const unsigned char *buf, size_t *nbytes, char **string_ptr); + /*********************/ /* Package Variables */ /*********************/ @@ -82,14 +151,15 @@ DESCRIPTION herr_t H5R__init_package(void) { - herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI_NOINIT_NOERR /* Mark "top" of interface as initialized */ H5R_top_package_initialize_s = TRUE; - FUNC_LEAVE_NOAPI(ret_value) + /* Sanity check, if assert fails, H5R_REF_BUF_SIZE must be increased */ + HDcompile_assert(sizeof(H5R_ref_priv_t) <= H5R_REF_BUF_SIZE); + + FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5R__init_package() */ @@ -167,571 +237,1473 @@ H5R_term_package(void) } /* end H5R_term_package() */ -/*-------------------------------------------------------------------------- - NAME - H5R__create - PURPOSE - Creates a particular kind of reference for the user - USAGE - herr_t H5R__create(ref, loc, name, ref_type, space) - void *ref; OUT: Reference created - H5G_loc_t *loc; IN: File location used to locate object pointed to - const char *name; IN: Name of object at location LOC_ID of object - pointed to - H5R_type_t ref_type; IN: Type of reference to create - H5S_t *space; IN: Dataspace ID with selection, used for Dataset - Region references. +/*------------------------------------------------------------------------- + * Function: H5R__create_object + * + * Purpose: Creates an object reference. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__create_object(const H5VL_token_t *obj_token, size_t token_size, + H5R_ref_priv_t *ref) +{ + size_t encode_size; + herr_t ret_value = SUCCEED; /* Return value */ - RETURNS - Non-negative on success/Negative on failure - DESCRIPTION - Creates a particular type of reference specified with REF_TYPE, in the - space pointed to by REF. The LOC_ID and NAME are used to locate the object - pointed to and the SPACE_ID is used to choose the region pointed to (for - Dataset Region references). - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - EXAMPLES - REVISION LOG ---------------------------------------------------------------------------*/ + FUNC_ENTER_PACKAGE + + HDassert(ref); + + /* Create new reference */ + H5MM_memcpy(ref->ref.obj.token, obj_token, token_size); + ref->ref.obj.filename = NULL; + ref->loc_id = H5I_INVALID_HID; + ref->type = (uint8_t)H5R_OBJECT2; + ref->token_size = (uint8_t)token_size; + + /* Cache encoding size (assume no external reference) */ + if(H5R__encode(NULL, ref, NULL, &encode_size, 0) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, "unable to determine encoding size") + ref->encode_size = (uint32_t)encode_size; + + H5R_LOG_DEBUG("Created object reference, %d, filename=%s, obj_addr=%s, encode size=%u", + (int)sizeof(H5R_ref_priv_t), ref->ref.obj.filename, H5R__print_token(ref->ref.obj.token), + ref->encode_size); + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__create_object() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__create_region + * + * Purpose: Creates a region reference. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ herr_t -H5R__create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space) +H5R__create_region(const H5VL_token_t *obj_token, size_t token_size, + H5S_t *space, H5R_ref_priv_t *ref) { - H5G_loc_t obj_loc; /* Group hier. location of object */ - H5G_name_t path; /* Object group hier. path */ - H5O_loc_t oloc; /* Object object location */ - hbool_t obj_found = FALSE; /* Object location found */ - herr_t ret_value = SUCCEED; /* Return value */ + size_t encode_size; + herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE - HDassert(_ref); - HDassert(loc); - HDassert(name); - HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE); + HDassert(space); + HDassert(ref); - /* Set up object location to fill in */ - obj_loc.oloc = &oloc; - obj_loc.path = &path; - H5G_loc_reset(&obj_loc); + /* Create new reference */ + H5MM_memcpy(ref->ref.obj.token, obj_token, token_size); + ref->ref.obj.filename = NULL; + if(NULL == (ref->ref.reg.space = H5S_copy(space, FALSE, TRUE))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "unable to copy dataspace") - /* Set the FAPL for the API context */ - H5CX_set_libver_bounds(loc->oloc->file); + ref->loc_id = H5I_INVALID_HID; + ref->type = (uint8_t)H5R_DATASET_REGION2; + ref->token_size = (uint8_t)token_size; - /* Find the object */ - if(H5G_loc_find(loc, name, &obj_loc) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found") - obj_found = TRUE; + /* Cache encoding size (assume no external reference) */ + if(H5R__encode(NULL, ref, NULL, &encode_size, 0) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, "unable to determine encoding size") + ref->encode_size = (uint32_t)encode_size; - switch (ref_type) { - case H5R_OBJECT: - { - hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */ + H5R_LOG_DEBUG("Created region reference, %d, filename=%s, obj_addr=%s, encode size=%u", + (int)sizeof(H5R_ref_priv_t), ref->ref.obj.filename, H5R__print_token(ref->ref.obj.token), + ref->encode_size); - *ref = obj_loc.oloc->addr; - break; +done: + if(ret_value < 0) { + if(ref->ref.reg.space) { + H5S_close(ref->ref.reg.space); + ref->ref.reg.space = NULL; } + } + FUNC_LEAVE_NOAPI(ret_value) +} /* H5R__create_region */ - case H5R_DATASET_REGION: - { - H5HG_t hobjid; /* Heap object ID */ - hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */ - hssize_t buf_size; /* Size of buffer needed to serialize selection */ - uint8_t *p; /* Pointer to OID to store */ - uint8_t *buf; /* Buffer to store serialized selection in */ - unsigned heapid_found; /* Flag for non-zero heap ID found */ - unsigned u; /* local index */ - - /* Set up information for dataset region */ - - /* Return any previous heap block to the free list if we are - * garbage collecting - */ - if (H5F_GC_REF(loc->oloc->file)) { - /* Check for an existing heap ID in the reference */ - for (u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++) - if (p[u] != 0) { - heapid_found = 1; - break; - } - - if (heapid_found != 0) { - /* Return heap block to free list */ - } - } - - /* Zero the heap ID out, may leak heap space if user is re-using - * reference and doesn't have garbage collection turned on - */ - HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE); - - /* Get the amount of space required to serialize the selection */ - if ((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection") - - /* Increase buffer size to allow for the dataset OID */ - buf_size += (hssize_t)sizeof(haddr_t); - - /* Allocate the space to store the serialized information */ - H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t); - if (NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size))) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") - - /* Serialize information for dataset OID into heap buffer */ - p = (uint8_t *)buf; - H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr); - - /* Serialize the selection into heap buffer */ - if (H5S_SELECT_SERIALIZE(space, &p) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection") - - /* Save the serialized buffer for later */ - H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t); - if(H5HG_insert(loc->oloc->file, (size_t)buf_size, buf, &hobjid) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection") - - /* Serialize the heap ID and index for storage in the file */ - p = (uint8_t *)ref; - H5F_addr_encode(loc->oloc->file, &p, hobjid.addr); - UINT32ENCODE(p, hobjid.idx); - - /* Free the buffer we serialized data in */ - H5MM_xfree(buf); - break; - } /* end case H5R_DATASET_REGION */ + +/*------------------------------------------------------------------------- + * Function: H5R__create_attr + * + * Purpose: Creates an attribute reference. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__create_attr(const H5VL_token_t *obj_token, size_t token_size, + const char *attr_name, H5R_ref_priv_t *ref) +{ + size_t encode_size; + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + HDassert(attr_name); + HDassert(ref); + + /* Make sure that attribute name is not longer than supported encode size */ + if(HDstrlen(attr_name) > H5R_MAX_STRING_LEN) + HGOTO_ERROR(H5E_REFERENCE, H5E_ARGS, FAIL, "attribute name too long (%d > %d)", (int)HDstrlen(attr_name), H5R_MAX_STRING_LEN) + + /* Create new reference */ + H5MM_memcpy(ref->ref.obj.token, obj_token, token_size); + ref->ref.obj.filename = NULL; + if(NULL == (ref->ref.attr.name = HDstrdup(attr_name))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Cannot copy attribute name") + + ref->loc_id = H5I_INVALID_HID; + ref->type = (uint8_t)H5R_ATTR; + ref->token_size = (uint8_t)token_size; + + /* Cache encoding size (assume no external reference) */ + if(H5R__encode(NULL, ref, NULL, &encode_size, 0) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, "unable to determine encoding size") + ref->encode_size = (uint32_t)encode_size; + + H5R_LOG_DEBUG("Created attribute reference, %d, filename=%s, obj_addr=%s, attr name=%s, encode size=%u", + (int)sizeof(H5R_ref_priv_t), ref->ref.obj.filename, H5R__print_token(ref->ref.obj.token), + ref->ref.attr.name, ref->encode_size); +done: + if(ret_value < 0) + ref->ref.attr.name = H5MM_xfree(ref->ref.attr.name); + FUNC_LEAVE_NOAPI(ret_value) +} /* H5R__create_attr */ + + +/*------------------------------------------------------------------------- + * Function: H5R__destroy + * + * Purpose: Destroy reference. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__destroy(H5R_ref_priv_t *ref) +{ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + HDassert(ref != NULL); + + ref->ref.obj.filename = H5MM_xfree(ref->ref.obj.filename); + + switch(ref->type) { + case H5R_OBJECT2: + break; + case H5R_DATASET_REGION2: + if(H5S_close(ref->ref.reg.space) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTFREE, FAIL, "Cannot close dataspace") + ref->ref.reg.space = NULL; + break; + case H5R_ATTR: + ref->ref.attr.name = H5MM_xfree(ref->ref.attr.name); + break; + case H5R_OBJECT1: + case H5R_DATASET_REGION1: case H5R_BADTYPE: case H5R_MAXTYPE: + HDassert("invalid reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (invalid reference type)") default: HDassert("unknown reference type" && 0); HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)") } /* end switch */ -done: - if (obj_found) - H5G_loc_free(&obj_loc); + /* Decrement refcount of attached loc_id */ + if((ref->loc_id != H5I_INVALID_HID) && (H5I_dec_ref(ref->loc_id) < 0)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "decrementing location ID failed") +done: FUNC_LEAVE_NOAPI(ret_value) -} /* end H5R__create() */ +} /* end H5R__destroy() */ -/*-------------------------------------------------------------------------- - NAME - H5R__dereference - PURPOSE - Opens the HDF5 object referenced. - USAGE - hid_t H5R__dereference(ref, oapl_id, ref_type, ref) - H5F_t *file; IN: File the object being dereferenced is within - hid_t oapl_id; IN: Object access property list ID - H5R_type_t ref_type; IN: Type of reference - void *ref; IN: Reference to open. +/*------------------------------------------------------------------------- + * Function: H5R__set_loc_id + * + * Purpose: Attach location ID to reference and increment location refcount. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__set_loc_id(H5R_ref_priv_t *ref, hid_t id, hbool_t inc_ref) +{ + herr_t ret_value = SUCCEED; /* Return value */ - RETURNS - Valid ID on success, Negative on failure - DESCRIPTION - Given a reference to some object, open that object and return an ID for - that object. - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - Currently only set up to work with references to datasets - EXAMPLES - REVISION LOG - Raymond Lu - 13 July 2011 - I added the OAPL_ID parameter for the object being referenced. It only - supports dataset access property list currently. - - M. Scot Breitenfeld - 3 March 2015 - Added a check for undefined reference pointer. ---------------------------------------------------------------------------*/ + FUNC_ENTER_PACKAGE + + HDassert(ref != NULL); + HDassert(id != H5I_INVALID_HID); + + /* If a location ID was previously assigned, decrement refcount and assign new one */ + if((ref->loc_id != H5I_INVALID_HID) && (H5I_dec_ref(ref->loc_id) < 0)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "decrementing location ID failed") + ref->loc_id = id; + + /* Prevent location ID from being freed until reference is destroyed */ + if(inc_ref && H5I_inc_ref(ref->loc_id, FALSE) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINC, FAIL, "incrementing location ID failed") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__set_loc_id() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__get_loc_id + * + * Purpose: Retrieve location ID attached to existing reference. + * + * Return: Valid ID on success/Negative on failure + * + *------------------------------------------------------------------------- + */ hid_t -H5R__dereference(H5F_t *file, hid_t oapl_id, H5R_type_t ref_type, const void *_ref) +H5R__get_loc_id(const H5R_ref_priv_t *ref) { - H5O_loc_t oloc; /* Object location */ - H5G_name_t path; /* Path of object */ - H5G_loc_t loc; /* Group location */ - unsigned rc; /* Reference count of object */ - H5O_type_t obj_type; /* Type of object */ hid_t ret_value = H5I_INVALID_HID; /* Return value */ + FUNC_ENTER_PACKAGE_NOERR + + HDassert(ref != NULL); + + ret_value = ref->loc_id; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__get_loc_id() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__reopen_file + * + * Purpose: Re-open referenced file using file access property list. + * + * Return: Valid ID on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +hid_t +H5R__reopen_file(H5R_ref_priv_t *ref, hid_t fapl_id) +{ + void *new_file = NULL; + H5VL_connector_prop_t connector_prop; + unsigned flags = H5F_ACC_RDWR; /* Must open file read-write to allow for object modifications */ + H5P_genplist_t *plist; + hid_t ret_value = H5I_INVALID_HID; + FUNC_ENTER_PACKAGE - HDassert(_ref); - HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE); - HDassert(file); + /* TODO add search path */ - /* Initialize the object location */ - H5O_loc_reset(&oloc); - oloc.file = file; + /* Verify access property list and set up collective metadata if appropriate */ + if(H5CX_set_apl(&fapl_id, H5P_CLS_FACC, H5I_INVALID_HID, TRUE) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info") - switch (ref_type) { - case H5R_OBJECT: - { - oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */ - if (!H5F_addr_defined(oloc.addr) || oloc.addr == 0) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "Undefined reference pointer") - break; - } + /* Get the VOL info from the fapl */ + if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a file access property list") + if(H5P_peek(plist, H5F_ACS_VOL_CONN_NAME, &connector_prop) < 0) + HGOTO_ERROR(H5E_FILE, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL connector info") - case H5R_DATASET_REGION: - { - H5HG_t hobjid; /* Heap object ID */ - uint8_t *buf; /* Buffer to store serialized selection in */ - const uint8_t *p; /* Pointer to OID to store */ + /* Stash a copy of the "top-level" connector property, before any pass-through + * connectors modify or unwrap it. + */ + if(H5CX_set_vol_connector_prop(&connector_prop) < 0) + HGOTO_ERROR(H5E_FILE, H5E_CANTSET, H5I_INVALID_HID, "can't set VOL connector info in API context") - /* Get the heap ID for the dataset region */ - p = (const uint8_t *)_ref; - H5F_addr_decode(oloc.file, &p, &(hobjid.addr)); - UINT32DECODE(p, hobjid.idx); + /* Open the file */ + if(NULL == (new_file = H5VL_file_open(&connector_prop, H5R_REF_FILENAME(ref), flags, fapl_id, H5P_DATASET_XFER_DEFAULT, H5_REQUEST_NULL))) + HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, H5I_INVALID_HID, "unable to open file") - if (!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "Undefined reference pointer") + /* Get an ID for the file */ + if((ret_value = H5VL_register_using_vol_id(H5I_FILE, new_file, connector_prop.connector_id, TRUE)) < 0) + HGOTO_ERROR(H5E_FILE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to atomize file handle") - /* Get the dataset region from the heap (allocate inside routine) */ - if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL))) - HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, H5I_INVALID_HID, "Unable to read dataset region information") + /* Attach loc_id to reference */ + if(H5R__set_loc_id((H5R_ref_priv_t *)ref, ret_value, FALSE) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, H5I_INVALID_HID, "unable to attach location id to reference") - /* Get the object oid for the dataset */ - p = buf; - H5F_addr_decode(oloc.file, &p, &(oloc.addr)); +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__reopen_file() */ - /* Free the buffer allocated in H5HG_read() */ - H5MM_xfree(buf); - break; - } /* end case H5R_DATASET_REGION */ + +/*------------------------------------------------------------------------- + * Function: H5R__get_type + * + * Purpose: Given a reference to some object, return the type of that reference. + * + * Return: Type of the reference + * + *------------------------------------------------------------------------- + */ +H5R_type_t +H5R__get_type(const H5R_ref_priv_t *ref) +{ + H5R_type_t ret_value = H5R_BADTYPE; + + FUNC_ENTER_PACKAGE_NOERR + + HDassert(ref != NULL); + ret_value = ref->type; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__get_type() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__equal + * + * Purpose: Compare two references + * + * Return: TRUE if equal, FALSE if unequal, FAIL if error + * + *------------------------------------------------------------------------- + */ +htri_t +H5R__equal(const H5R_ref_priv_t *ref1, const H5R_ref_priv_t *ref2) +{ + htri_t ret_value = TRUE; + + FUNC_ENTER_PACKAGE + HDassert(ref1 != NULL); + HDassert(ref2 != NULL); + + /* Compare reference types */ + if(ref1->type != ref2->type) + HGOTO_DONE(FALSE); + + /* Compare object addresses */ + if(ref1->token_size != ref2->token_size) + HGOTO_DONE(FALSE); + if(0 != HDmemcmp(ref1->ref.obj.token, ref2->ref.obj.token, ref1->token_size)) + HGOTO_DONE(FALSE); + + /* Compare filenames */ + if((ref1->ref.obj.filename && (NULL == ref2->ref.obj.filename)) + || ((NULL == ref1->ref.obj.filename) && ref2->ref.obj.filename)) + HGOTO_DONE(FALSE); + if(ref1->ref.obj.filename && ref1->ref.obj.filename + && (0 != HDstrcmp(ref1->ref.obj.filename, ref2->ref.obj.filename))) + HGOTO_DONE(FALSE); + + switch(ref1->type) { + case H5R_OBJECT2: + break; + case H5R_DATASET_REGION2: + if((ret_value = H5S_extent_equal(ref1->ref.reg.space, ref2->ref.reg.space)) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOMPARE, FAIL, "cannot compare dataspace extents") + break; + case H5R_ATTR: + HDassert(ref1->ref.attr.name && ref2->ref.attr.name); + if(0 != HDstrcmp(ref1->ref.attr.name, ref2->ref.attr.name)) + HGOTO_DONE(FALSE); + break; + case H5R_OBJECT1: + case H5R_DATASET_REGION1: case H5R_BADTYPE: case H5R_MAXTYPE: + HDassert("invalid reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (invalid reference type)") default: HDassert("unknown reference type" && 0); - HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, H5I_INVALID_HID, "internal error (unknown reference type)") + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)") } /* end switch */ - /* Get the # of links for object, and its type - * (To check to make certain that this object hasn't been deleted - * since the reference was created) - */ - if(H5O_get_rc_and_type(&oloc, &rc, &obj_type) < 0 || 0 == rc) - HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, H5I_INVALID_HID, "dereferencing deleted object") +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__equal() */ - /* Construct a group location for opening the object */ - H5G_name_reset(&path); - loc.oloc = &oloc; - loc.path = &path; + +/*------------------------------------------------------------------------- + * Function: H5R__copy + * + * Purpose: Copy a reference + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__copy(const H5R_ref_priv_t *src_ref, H5R_ref_priv_t *dst_ref) +{ + herr_t ret_value = SUCCEED; - /* Open the object */ - switch (obj_type) { - case H5O_TYPE_GROUP: - { - H5G_t *group; /* Pointer to group to open */ + FUNC_ENTER_PACKAGE - if(NULL == (group = H5G_open(&loc))) - HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5I_INVALID_HID, "not found") + HDassert((src_ref != NULL) && (dst_ref != NULL)); - /* Create an atom for the group */ - if((ret_value = H5I_register(H5I_GROUP, group, TRUE)) < 0) { - H5G_close(group); - HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register group") - } + H5MM_memcpy(dst_ref->ref.obj.token, src_ref->ref.obj.token, src_ref->token_size); + dst_ref->encode_size = src_ref->encode_size; + dst_ref->type = src_ref->type; + dst_ref->token_size = src_ref->token_size; + switch(src_ref->type) { + case H5R_OBJECT2: break; - } - - case H5O_TYPE_NAMED_DATATYPE: - { - H5T_t *type; /* Pointer to datatype to open */ - - if(NULL == (type = H5T_open(&loc))) - HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, H5I_INVALID_HID, "not found") + case H5R_DATASET_REGION2: + if(NULL == (dst_ref->ref.reg.space = H5S_copy(src_ref->ref.reg.space, FALSE, TRUE))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "unable to copy dataspace") + break; + case H5R_ATTR: + if(NULL == (dst_ref->ref.attr.name = HDstrdup(src_ref->ref.attr.name))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Cannot copy attribute name") + break; + case H5R_OBJECT1: + case H5R_DATASET_REGION1: + HDassert("invalid reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (invalid reference type)") + case H5R_BADTYPE: + case H5R_MAXTYPE: + default: + HDassert("unknown reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)") + } /* end switch */ - /* Create an atom for the datatype */ - if((ret_value = H5I_register(H5I_DATATYPE, type, TRUE)) < 0) { - H5T_close(type); - HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register datatype") - } + /* We only need to keep a copy of the filename if we don't have the loc_id */ + if(src_ref->loc_id == H5I_INVALID_HID) { + HDassert(src_ref->ref.obj.filename); - break; - } + if(NULL == (dst_ref->ref.obj.filename = HDstrdup(src_ref->ref.obj.filename))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Cannot copy filename") + dst_ref->loc_id = H5I_INVALID_HID; + } else { + dst_ref->ref.obj.filename = NULL; - case H5O_TYPE_DATASET: - { - H5D_t *dset; /* Pointer to dataset to open */ + /* Set location ID and hold reference to it */ + if(H5R__set_loc_id(dst_ref, src_ref->loc_id, TRUE) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "cannot set reference location ID") + } - /* Open the dataset */ - if(NULL == (dset = H5D_open(&loc, oapl_id))) - HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, H5I_INVALID_HID, "not found") +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__copy() */ - /* Create an atom for the dataset */ - if((ret_value = H5I_register(H5I_DATASET, dset, TRUE)) < 0) { - H5D_close(dset); - HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register dataset") - } + +/*------------------------------------------------------------------------- + * Function: H5R__get_obj_token + * + * Purpose: Given a reference to some object, get the encoded object addr. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__get_obj_token(const H5R_ref_priv_t *ref, H5VL_token_t *obj_token, + size_t *token_size) +{ + herr_t ret_value = SUCCEED; /* Return value */ - break; - } + FUNC_ENTER_PACKAGE - case H5O_TYPE_MAP: - HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, H5I_INVALID_HID, "maps not supported in native VOL connector") + HDassert(ref != NULL); + HDassert(ref->token_size <= H5VL_MAX_TOKEN_SIZE); - case H5O_TYPE_UNKNOWN: - case H5O_TYPE_NTYPES: - default: - HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, H5I_INVALID_HID, "can't identify type of object referenced") - } /* end switch */ + if(obj_token) { + if(0 == ref->token_size) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "NULL token size") + H5MM_memcpy(obj_token, ref->ref.obj.token, ref->token_size); + } + if(token_size) + *token_size = ref->token_size; done: FUNC_LEAVE_NOAPI(ret_value) -} /* end H5R__dereference() */ +} /* end H5R__get_obj_token() */ -/*-------------------------------------------------------------------------- - NAME - H5R__get_region - PURPOSE - Retrieves a dataspace with the region pointed to selected. - USAGE - H5S_t *H5R__get_region(file, ref) - H5F_t *file; IN: File the object being dereferenced is within - void *ref; IN: Reference to open. +/*------------------------------------------------------------------------- + * Function: H5R__set_obj_token + * + * Purpose: Given a reference to some object, set the encoded object addr. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__set_obj_token(H5R_ref_priv_t *ref, const H5VL_token_t *obj_token, + size_t token_size) +{ + herr_t ret_value = SUCCEED; /* Return value */ - RETURNS - Pointer to the dataspace on success, NULL on failure - DESCRIPTION - Given a reference to some object, creates a copy of the dataset pointed - to's dataspace and defines a selection in the copy which is the region - pointed to. - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - EXAMPLES - REVISION LOG ---------------------------------------------------------------------------*/ -H5S_t * -H5R__get_region(H5F_t *file, const void *_ref) + FUNC_ENTER_PACKAGE_NOERR + + HDassert(ref != NULL); + HDassert(obj_token); + HDassert(token_size); + HDassert(token_size <= H5VL_MAX_TOKEN_SIZE); + + H5MM_memcpy(ref->ref.obj.token, obj_token, ref->token_size); + ref->token_size = token_size; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__set_obj_token() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__get_region + * + * Purpose: Given a reference to some object, creates a copy of the dataset + * pointed to's dataspace and defines a selection in the copy which is the + * region pointed to. + * + * Return: Pointer to the dataspace on success/NULL on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__get_region(const H5R_ref_priv_t *ref, H5S_t *space) { - H5O_loc_t oloc; /* Object location */ - const uint8_t *p; /* Pointer to OID to store */ - H5HG_t hobjid; /* Heap object ID */ - uint8_t *buf = NULL; /* Buffer to store serialized selection in */ - H5S_t *ret_value; /* Return value */ + herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE - HDassert(_ref); - HDassert(file); + HDassert(ref != NULL); + HDassert(ref->type == H5R_DATASET_REGION2); + HDassert(space); - /* Initialize the object location */ - H5O_loc_reset(&oloc); - oloc.file = file; + /* Copy reference selection to destination */ + if(H5S_select_copy(space, ref->ref.reg.space, FALSE) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "unable to copy selection") - /* Get the heap ID for the dataset region */ - p = (const uint8_t *)_ref; - H5F_addr_decode(oloc.file, &p, &(hobjid.addr)); - UINT32DECODE(p, hobjid.idx); +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__get_region() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__get_file_name + * + * Purpose: Given a reference to some object, determine a file name of the + * object located into. + * + * Return: Non-negative length of the path on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +ssize_t +H5R__get_file_name(const H5R_ref_priv_t *ref, char *buf, size_t size) +{ + size_t copy_len; + ssize_t ret_value = -1; /* Return value */ - /* Get the dataset region from the heap (allocate inside routine) */ - if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL))) - HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information") + FUNC_ENTER_PACKAGE - /* Get the object oid for the dataset */ - p = buf; - H5F_addr_decode(oloc.file, &p, &(oloc.addr)); + /* Check args */ + HDassert(ref != NULL); - /* Open and copy the dataset's dataspace */ - if(NULL == (ret_value = H5S_read(&oloc))) - HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found") + /* Return if that reference has no filename set */ + if(!ref->ref.obj.filename) + HGOTO_ERROR(H5E_REFERENCE, H5E_ARGS, (-1), "no filename available for that reference") - /* Unserialize the selection */ - if(H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection") + /* Get the file name length */ + copy_len = HDstrlen(ref->ref.obj.filename); + HDassert(copy_len <= H5R_MAX_STRING_LEN); -done: - /* Free the buffer allocated in H5HG_read() */ - if(buf) - H5MM_xfree(buf); + /* Copy the file name */ + if(buf) { + copy_len = MIN(copy_len, size - 1); + H5MM_memcpy(buf, ref->ref.obj.filename, copy_len); + buf[copy_len] = '\0'; + } + ret_value = (ssize_t)(copy_len + 1); +done: FUNC_LEAVE_NOAPI(ret_value) -} /* end H5R__get_region() */ +} /* end H5R__get_file_name() */ -/*-------------------------------------------------------------------------- - NAME - H5R__get_obj_type - PURPOSE - Retrieves the type of object that an object reference points to - USAGE - H5O_type_t H5R__get_obj_type(file, ref_type, ref) - H5F_t *file; IN: File the object being dereferenced is within - H5R_type_t ref_type; IN: Type of reference to query - void *ref; IN: Reference to query. - H5O_type_t *obj_type; OUT: The type of the object, set on success +/*------------------------------------------------------------------------- + * Function: H5R__get_attr_name + * + * Purpose: Given a reference to some attribute, determine its name. + * + * Return: Non-negative length of the path on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +ssize_t +H5R__get_attr_name(const H5R_ref_priv_t *ref, char *buf, size_t size) +{ + ssize_t ret_value = -1; /* Return value */ + size_t attr_name_len; /* Length of the attribute name */ - RETURNS - Non-negative on success/Negative on failure - DESCRIPTION - Given a reference to some object, this function returns the type of object - pointed to. - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - EXAMPLES - REVISION LOG ---------------------------------------------------------------------------*/ + FUNC_ENTER_PACKAGE_NOERR + + /* Check args */ + HDassert(ref != NULL); + HDassert(ref->type == H5R_ATTR); + + /* Get the attribute name length */ + attr_name_len = HDstrlen(ref->ref.attr.name); + HDassert(attr_name_len <= H5R_MAX_STRING_LEN); + + /* Get the attribute name */ + if(buf) { + size_t copy_len = MIN(attr_name_len, size - 1); + H5MM_memcpy(buf, ref->ref.attr.name, copy_len); + buf[copy_len] = '\0'; + } + + ret_value = (ssize_t)(attr_name_len + 1); + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__get_attr_name() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__encode + * + * Purpose: Private function for H5Rencode. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ herr_t -H5R__get_obj_type(H5F_t *file, H5R_type_t ref_type, const void *_ref, - H5O_type_t *obj_type) +H5R__encode(const char *filename, const H5R_ref_priv_t *ref, unsigned char *buf, + size_t *nalloc, unsigned flags) { - H5O_loc_t oloc; /* Object location */ - unsigned rc; /* Reference count of object */ - herr_t ret_value = SUCCEED; /* Return value */ + uint8_t *p = (uint8_t *)buf; + size_t buf_size = 0, encode_size = 0; + herr_t ret_value = SUCCEED; FUNC_ENTER_PACKAGE - HDassert(file); - HDassert(_ref); + HDassert(ref); + HDassert(nalloc); + + /** + * Encoding format: + * | Reference type (8 bits) | Flags (8 bits) | Token (token size) + * | | + * | |----> H5R_IS_EXTERNAL: File info + * | + * |----> H5R_DATASET_REGION2: Serialized selection + * | + * |----> H5R_ATTR: Attribute name len + name + * + */ + + /* Don't encode if buffer size isn't big enough or buffer is empty */ + if(buf && *nalloc >= H5R_ENCODE_HEADER_SIZE) { + /* Encode the type of the reference */ + *p++ = (uint8_t)ref->type; + + /* Encode the flags */ + *p++ = (uint8_t)flags; - /* Initialize the symbol table entry */ - H5O_loc_reset(&oloc); - oloc.file = file; + buf_size = *nalloc - H5R_ENCODE_HEADER_SIZE; + } + encode_size += H5R_ENCODE_HEADER_SIZE; + + /* Encode object token */ + H5R_ENCODE_VAR(H5R__encode_obj_token, &ref->ref.obj.token, ref->token_size, + p, buf_size, encode_size, "Cannot encode object address"); + + /** + * TODO Encode VOL info + * When we have a better way of storing blobs, we should add + * support for referencing files in external VOLs. + * There are currently multiple limitations: + * - avoid duplicating VOL info on each reference + * - must query terminal VOL connector to avoid passthrough confusion + */ + if(flags & H5R_IS_EXTERNAL) { + /* Encode file name */ + H5R_ENCODE(H5R__encode_string, filename, p, buf_size, encode_size, + "Cannot encode filename"); + } - switch (ref_type) { - case H5R_OBJECT: - { - /* Get the object oid */ - oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */ + switch(ref->type) { + case H5R_OBJECT2: break; - } + case H5R_DATASET_REGION2: + /* Encode dataspace */ + H5R_ENCODE(H5R__encode_region, ref->ref.reg.space, p, buf_size, + encode_size, "Cannot encode region"); + break; + case H5R_ATTR: + /* Encode attribute name */ + H5R_ENCODE(H5R__encode_string, ref->ref.attr.name, p, buf_size, + encode_size, "Cannot encode attribute name"); + break; + case H5R_OBJECT1: + case H5R_DATASET_REGION1: + case H5R_BADTYPE: + case H5R_MAXTYPE: + HDassert("invalid reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (invalid reference type)") + default: + HDassert("unknown reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)") + } /* end switch */ + + *nalloc = encode_size; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode() */ - case H5R_DATASET_REGION: - { - H5HG_t hobjid; /* Heap object ID */ - const uint8_t *p; /* Pointer to reference to decode */ - uint8_t *buf; /* Buffer to store serialized selection in */ + +/*------------------------------------------------------------------------- + * Function: H5R__decode + * + * Purpose: Private function for H5Rdecode. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__decode(const unsigned char *buf, size_t *nbytes, H5R_ref_priv_t *ref) +{ + const uint8_t *p = (const uint8_t *)buf; + size_t buf_size = 0, decode_size = 0; + uint8_t flags; + herr_t ret_value = SUCCEED; - /* Get the heap ID for the dataset region */ - p = (const uint8_t *)_ref; - H5F_addr_decode(oloc.file, &p, &(hobjid.addr)); - UINT32DECODE(p, hobjid.idx); + FUNC_ENTER_PACKAGE - /* Get the dataset region from the heap (allocate inside routine) */ - if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL))) - HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information") + HDassert(buf); + HDassert(nbytes); + HDassert(ref); + buf_size = *nbytes; - /* Get the object oid for the dataset */ - p = buf; - H5F_addr_decode(oloc.file, &p, &(oloc.addr)); + /* Don't decode if buffer size isn't big enough */ + if(buf_size < H5R_ENCODE_HEADER_SIZE) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") - /* Free the buffer allocated in H5HG_read() */ - H5MM_xfree(buf); + /* Set new reference */ + ref->type = (H5R_type_t)*p++; + if(ref->type <= H5R_BADTYPE || ref->type >= H5R_MAXTYPE) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type") - break; - } + /* Set flags */ + flags = *p++; + + buf_size -= H5R_ENCODE_HEADER_SIZE; + decode_size += H5R_ENCODE_HEADER_SIZE; + /* Decode object token */ + H5R_DECODE_VAR(H5R__decode_obj_token, &ref->ref.obj.token, &ref->token_size, + p, buf_size, decode_size, "Cannot decode object address"); + + /* We do not need to store the filename if the reference is internal */ + if(flags & H5R_IS_EXTERNAL) { + /* Decode file name */ + H5R_DECODE(H5R__decode_string, &ref->ref.obj.filename, p, buf_size, + decode_size, "Cannot decode filename"); + } else + ref->ref.obj.filename = NULL; + + switch(ref->type) { + case H5R_OBJECT2: + break; + case H5R_DATASET_REGION2: + /* Decode dataspace */ + H5R_DECODE(H5R__decode_region, &ref->ref.reg.space, p, buf_size, + decode_size, "Cannot decode region"); + break; + case H5R_ATTR: + /* Decode attribute name */ + H5R_DECODE(H5R__decode_string, &ref->ref.attr.name, p, buf_size, + decode_size, "Cannot decode attribute name"); + break; + case H5R_OBJECT1: + case H5R_DATASET_REGION1: case H5R_BADTYPE: case H5R_MAXTYPE: + HDassert("invalid reference type" && 0); + HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (invalid reference type)") default: HDassert("unknown reference type" && 0); HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)") } /* end switch */ - /* Get the # of links for object, and its type */ - /* (To check to make certain that this object hasn't been deleted since the reference was created) */ - if(H5O_get_rc_and_type(&oloc, &rc, obj_type) < 0 || 0 == rc) - HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object") + /* Set loc ID to invalid */ + ref->loc_id = H5I_INVALID_HID; + + /* Set encoding size */ + ref->encode_size = decode_size; + + H5R_LOG_DEBUG("Decoded reference, filename=%s, obj_addr=%s, encode size=%u", + ref->ref.obj.filename, H5R__print_token(ref->ref.obj.token), + ref->encode_size); + + *nbytes = decode_size; done: FUNC_LEAVE_NOAPI(ret_value) -} /* end H5R__get_obj_type() */ +} /* end H5R__decode() */ -/*-------------------------------------------------------------------------- - NAME - H5R__get_name - PURPOSE - Internal routine to determine a name for the object referenced - USAGE - ssize_t H5R__get_name(f, ref_type, ref, name, size) - H5F_t *f; IN: Pointer to the file that the reference is pointing - into - hid_t lapl_id; IN: LAPL to use for operation - hid_t id; IN: Location ID given for reference - H5R_type_t ref_type; IN: Type of reference - void *_ref; IN: Reference to query. - char *name; OUT: Buffer to place name of object referenced - size_t size; IN: Size of name buffer +/*------------------------------------------------------------------------- + * Function: H5R__encode_obj_token + * + * Purpose: Encode an object address. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__encode_obj_token(const H5VL_token_t *obj_token, size_t token_size, + unsigned char *buf, size_t *nalloc) +{ + herr_t ret_value = SUCCEED; - RETURNS - Non-negative length of the path on success, -1 on failure - DESCRIPTION - Given a reference to some object, determine a path to the object - referenced in the file. - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - This may not be the only path to that object. - EXAMPLES - REVISION LOG ---------------------------------------------------------------------------*/ -ssize_t -H5R__get_name(H5F_t *f, H5R_type_t ref_type, const void *_ref, - char *name, size_t size) + FUNC_ENTER_STATIC_NOERR + + HDassert(nalloc); + + /* Don't encode if buffer size isn't big enough or buffer is empty */ + if(buf && *nalloc >= token_size) { + uint8_t *p = (uint8_t *)buf; + + /* Encode token size */ + *p++ = (uint8_t)(token_size & 0xff); + + /* Encode token */ + H5MM_memcpy(p, obj_token, token_size); + } + *nalloc = token_size + H5_SIZEOF_UINT8_T; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode_obj_token() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_obj_token + * + * Purpose: Decode an object address. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__decode_obj_token(const unsigned char *buf, size_t *nbytes, + H5VL_token_t *obj_token, uint8_t *token_size) { - H5O_loc_t oloc; /* Object location describing object for reference */ - ssize_t ret_value = -1; /* Return value */ + const uint8_t *p = (const uint8_t *)buf; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_STATIC + + HDassert(buf); + HDassert(nbytes); + HDassert(obj_token); + HDassert(token_size); + + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < H5_SIZEOF_UINT8_T) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Get token size */ + *token_size = *p++; + if(*token_size > sizeof(H5VL_token_t)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Invalid token size (%u)", *token_size) + + /* Decode token */ + H5MM_memcpy(obj_token, p, *token_size); + + *nbytes = *token_size + H5_SIZEOF_UINT8_T; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__decode_obj_token() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__encode_region + * + * Purpose: Encode a selection. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__encode_region(H5S_t *space, unsigned char *buf, size_t *nalloc) +{ + uint8_t *p = NULL; /* Pointer to data to store */ + hssize_t buf_size = 0; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_STATIC + + HDassert(space); + HDassert(nalloc); + + /* Get the amount of space required to serialize the selection */ + if((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, "Cannot determine amount of space needed for serializing selection") + + /* Don't encode if buffer size isn't big enough or buffer is empty */ + if(buf && *nalloc >= ((size_t)buf_size + 2 * H5_SIZEOF_UINT32_T)) { + p = (uint8_t *)buf; + int rank; + + /* Encode the size for safety check */ + UINT32ENCODE(p, (uint32_t)buf_size); + + /* Encode the extent rank */ + if((rank = H5S_get_simple_extent_ndims(space)) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't get extent rank for selection") + UINT32ENCODE(p, (uint32_t)rank); + + /* Serialize the selection */ + if(H5S_SELECT_SERIALIZE(space, (unsigned char **)&p) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTENCODE, FAIL, "can't serialize selection") + } + *nalloc = (size_t)buf_size + 2 * H5_SIZEOF_UINT32_T; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode_region() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_region + * + * Purpose: Decode a selection. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__decode_region(const unsigned char *buf, size_t *nbytes, H5S_t **space_ptr) +{ + const uint8_t *p = (const uint8_t *)buf; + size_t buf_size = 0; + unsigned rank; + H5S_t *space; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_STATIC + + HDassert(buf); + HDassert(nbytes); + HDassert(space_ptr); + + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < (2 * H5_SIZEOF_UINT32_T)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Decode the selection size */ + UINT32DECODE(p, buf_size); + buf_size += H5_SIZEOF_UINT32_T; + + /* Decode the extent rank */ + UINT32DECODE(p, rank); + buf_size += H5_SIZEOF_UINT32_T; + + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < buf_size) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Deserialize the selection (dataspaces need the extent rank information) */ + if(NULL == (space = H5S_create(H5S_SIMPLE))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + if(H5S_set_extent_simple(space, rank, NULL, NULL) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set extent rank for selection") + if(H5S_SELECT_DESERIALIZE(&space, &p) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "can't deserialize selection") + + *nbytes = buf_size; + *space_ptr = space; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__decode_region() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__encode_string + * + * Purpose: Encode a string. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__encode_string(const char *string, unsigned char *buf, size_t *nalloc) +{ + size_t string_len, buf_size; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_STATIC + + HDassert(string); + HDassert(nalloc); + + /* Get the amount of space required to serialize the string */ + string_len = HDstrlen(string); + if(string_len > H5R_MAX_STRING_LEN) + HGOTO_ERROR(H5E_REFERENCE, H5E_ARGS, FAIL, "string too long") + + /* Compute buffer size, allow for the attribute name length and object address */ + buf_size = string_len + sizeof(uint16_t); + + if(buf && *nalloc >= buf_size) { + uint8_t *p = (uint8_t *)buf; + /* Serialize information for string length into the buffer */ + UINT16ENCODE(p, string_len); + /* Copy the string into the buffer */ + H5MM_memcpy(p, string, string_len); + } + *nalloc = buf_size; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode_string() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_string + * + * Purpose: Decode a string. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +static herr_t +H5R__decode_string(const unsigned char *buf, size_t *nbytes, char **string_ptr) +{ + const uint8_t *p = (const uint8_t *)buf; + size_t string_len; + char *string = NULL; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_STATIC + + HDassert(buf); + HDassert(nbytes); + HDassert(string_ptr); + + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < sizeof(uint16_t)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Get the string length */ + UINT16DECODE(p, string_len); + HDassert(string_len <= H5R_MAX_STRING_LEN); + + /* Allocate the string */ + if(NULL == (string = H5MM_malloc(string_len + 1))) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTALLOC, FAIL, "Cannot allocate string") + + /* Copy the string */ + H5MM_memcpy(string, p, string_len); + string[string_len] = '\0'; + + *string_ptr = string; + *nbytes = sizeof(uint16_t) + string_len; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__decode_string() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__encode_heap + * + * Purpose: Encode data and insert into heap (native only). + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__encode_heap(H5F_t *f, unsigned char *buf, size_t *nalloc, + const unsigned char *data, size_t data_size) +{ + size_t buf_size; + herr_t ret_value = SUCCEED; FUNC_ENTER_PACKAGE - /* Check args */ HDassert(f); - HDassert(_ref); + HDassert(nalloc); - /* Initialize the object location */ - H5O_loc_reset(&oloc); - oloc.file = f; + buf_size = H5HG_HEAP_ID_SIZE(f); + if(buf && *nalloc >= buf_size) { + H5HG_t hobjid; + uint8_t *p = (uint8_t *)buf; - /* Get address for reference */ - switch (ref_type) { - case H5R_OBJECT: - { - oloc.addr = *(const hobj_ref_t *)_ref; - break; - } + /* Write the reference information to disk (allocates space also) */ + if(H5HG_insert(f, data_size, (void *)data, &hobjid) < 0) + HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to write reference information") - case H5R_DATASET_REGION: - { - H5HG_t hobjid; /* Heap object ID */ - uint8_t *buf; /* Buffer to store serialized selection in */ - const uint8_t *p; /* Pointer to OID to store */ + /* Encode the heap information */ + H5F_addr_encode(f, &p, hobjid.addr); + UINT32ENCODE(p, hobjid.idx); + } + *nalloc = buf_size; - /* Get the heap ID for the dataset region */ - p = (const uint8_t *)_ref; - H5F_addr_decode(oloc.file, &p, &(hobjid.addr)); - UINT32DECODE(p, hobjid.idx); +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode_heap() */ - /* Get the dataset region from the heap (allocate inside routine) */ - if((buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL)) == NULL) - HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, (-1), "Unable to read dataset region information") + +/*------------------------------------------------------------------------- + * Function: H5R__decode_heap + * + * Purpose: Decode data inserted into heap (native only). + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__decode_heap(H5F_t *f, const unsigned char *buf, size_t *nbytes, + unsigned char **data_ptr, size_t *data_size) +{ + const uint8_t *p = (const uint8_t *)buf; + H5HG_t hobjid; + size_t buf_size; + herr_t ret_value = SUCCEED; - /* Get the object oid for the dataset */ - p = buf; - H5F_addr_decode(oloc.file, &p, &(oloc.addr)); + FUNC_ENTER_PACKAGE - /* Free the buffer allocated in H5HG_read() */ - H5MM_xfree(buf); + HDassert(f); + HDassert(buf); + HDassert(nbytes); + HDassert(data_ptr); + + buf_size = H5HG_HEAP_ID_SIZE(f); + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < buf_size) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Get the heap information */ + H5F_addr_decode(f, &p, &(hobjid.addr)); + if(!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer") + UINT32DECODE(p, hobjid.idx); - break; - } + /* Read the information from disk */ + if(NULL == (*data_ptr = (unsigned char *)H5HG_read(f, &hobjid, (void *)*data_ptr, data_size))) + HGOTO_ERROR(H5E_DATATYPE, H5E_READERROR, FAIL, "Unable to read reference data") - case H5R_BADTYPE: - case H5R_MAXTYPE: - default: - HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, (-1), "internal error (unknown reference type)") - } /* end switch */ + *nbytes = buf_size; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__decode_heap() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__free_heap + * + * Purpose: Remove data previously inserted into heap (native only). + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__free_heap(H5F_t *f, const unsigned char *buf, size_t nbytes) +{ + H5HG_t hobjid; + const uint8_t *p = (const uint8_t *)buf; + size_t buf_size; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + HDassert(f); + HDassert(buf); + + buf_size = H5HG_HEAP_ID_SIZE(f); + /* Don't decode if buffer size isn't big enough */ + if(nbytes < buf_size) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") + + /* Get the heap information */ + H5F_addr_decode(f, &p, &(hobjid.addr)); + if(!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer") + UINT32DECODE(p, hobjid.idx); + + /* Free heap object */ + if(hobjid.addr > 0) { + /* Free heap object */ + if(H5HG_remove(f, &hobjid) < 0) + HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to remove heap object") + } /* end if */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__free_heap() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_addr_compat + * + * Purpose: Decode an object address. (native only) + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__decode_addr_compat(hid_t id, H5I_type_t type, H5R_type_t ref_type, + const unsigned char *buf, haddr_t *addr_ptr) +{ + hid_t file_id = H5I_INVALID_HID; /* File ID for region reference */ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + if(ref_type == H5R_OBJECT1) { + size_t buf_size = H5R_OBJ_REF_BUF_SIZE; + + /* Get object address */ + if(H5R__decode_addr_obj_compat(buf, &buf_size, addr_ptr) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "unable to get object address") + } else { + void *vol_obj_file = NULL; + H5F_t *f = NULL; + size_t buf_size = H5R_DSET_REG_REF_BUF_SIZE; + + /* Get the file for the object */ + if((file_id = H5F_get_file_id(id, type, FALSE)) < 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object") + + /* Retrieve VOL object */ + if(NULL == (vol_obj_file = H5VL_vol_object(file_id))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier") + + /* Retrieve file from VOL object */ + if(NULL == (f = (H5F_t *)H5VL_object_data(vol_obj_file))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid VOL object") + + /* Get object address */ + if(H5R__decode_addr_region_compat(f, buf, &buf_size, addr_ptr, NULL) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "unable to get object address") + } + +done: + if(file_id != H5I_INVALID_HID && H5I_dec_ref(file_id) < 0) + HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "unable to decrement refcount on file") + FUNC_LEAVE_NOAPI(ret_value) +} + + +/*------------------------------------------------------------------------- + * Function: H5R__encode_addr_obj_compat + * + * Purpose: Encode an object address. (native only) + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__encode_addr_obj_compat(haddr_t addr, unsigned char *buf, size_t *nalloc) +{ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE_NOERR + + HDassert(nalloc); + + /* Don't encode if buffer size isn't big enough or buffer is empty */ + if(buf && *nalloc >= sizeof(addr)) + H5MM_memcpy(buf, &addr, sizeof(addr)); + *nalloc = sizeof(addr); + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__encode_addr_obj_compat() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_addr_obj_compat + * + * Purpose: Decode an object address. (native only) + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__decode_addr_obj_compat(const unsigned char *buf, size_t *nbytes, + haddr_t *addr_ptr) +{ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + HDassert(buf); + HDassert(nbytes); + HDassert(addr_ptr); + + /* Don't decode if buffer size isn't big enough */ + if(*nbytes < sizeof(*addr_ptr)) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "Buffer size is too small") - /* Get name, length, etc. */ - if((ret_value = H5G_get_name_by_addr(f, &oloc, name, size)) < 0) - HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, (-1), "can't determine name") + H5MM_memcpy(addr_ptr, buf, sizeof(*addr_ptr)); + + *nbytes = sizeof(*addr_ptr); done: FUNC_LEAVE_NOAPI(ret_value) -} /* end H5R__get_name() */ +} /* H5R__decode_addr_obj_compat() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__encode_addr_region_compat + * + * Purpose: Encode dataset selection and insert data into heap (native only). + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__encode_addr_region_compat(H5F_t *f, haddr_t obj_addr, H5S_t *space, + unsigned char *buf, size_t *nalloc) +{ + size_t buf_size; + unsigned char *data = NULL; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + HDassert(f); + HDassert(space); + HDassert(nalloc); + + /* Get required buffer size */ + if(H5R__encode_heap(f, NULL, &buf_size, NULL, (size_t)0) < 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier") + + if(buf && *nalloc >= buf_size) { + ssize_t data_size; + uint8_t *p; + + /* Pass the correct encoding version for the selection depending on the + * file libver bounds, this is later retrieved in H5S hyper encode */ + H5CX_set_libver_bounds(f); + + /* Zero the heap ID out, may leak heap space if user is re-using + * reference and doesn't have garbage collection turned on + */ + HDmemset(buf, 0, buf_size); + + /* Get the amount of space required to serialize the selection */ + if((data_size = H5S_SELECT_SERIAL_SIZE(space)) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection") + /* Increase buffer size to allow for the dataset OID */ + data_size += (hssize_t)sizeof(haddr_t); + + /* Allocate the space to store the serialized information */ + H5_CHECK_OVERFLOW(data_size, hssize_t, size_t); + if(NULL == (data = (uint8_t *)H5MM_malloc((size_t)data_size))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") + + /* Serialize information for dataset OID into heap buffer */ + p = (uint8_t *)data; + H5F_addr_encode(f, &p, obj_addr); + + /* Serialize the selection into heap buffer */ + if(H5S_SELECT_SERIALIZE(space, &p) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection") + + /* Write to heap */ + if(H5R__encode_heap(f, buf, nalloc, data, (size_t)data_size) < 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier") + } + *nalloc = buf_size; + +done: + H5MM_free(data); + FUNC_LEAVE_NOAPI(ret_value) +} /* H5R__encode_addr_region_compat() */ + + +/*------------------------------------------------------------------------- + * Function: H5R__decode_obj_addr_compat + * + * Purpose: Decode dataset selection from data inserted into heap (native only). + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5R__decode_addr_region_compat(H5F_t *f, const unsigned char *buf, + size_t *nbytes, haddr_t *obj_addr_ptr, H5S_t **space_ptr) +{ + unsigned char *data = NULL; + size_t data_size; + haddr_t obj_addr; + const uint8_t *p; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + HDassert(f); + HDassert(buf); + HDassert(nbytes); + + /* Read from heap */ + if(H5R__decode_heap(f, buf, nbytes, &data, &data_size) < 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier") + + /* Get object address */ + p = (const uint8_t *)data; + H5F_addr_decode(f, &p, &obj_addr); + if(!H5F_addr_defined(obj_addr) || obj_addr == 0) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer") + + if(space_ptr) { + H5O_loc_t oloc; /* Object location */ + H5S_t *space = NULL; + + /* Initialize the object location */ + H5O_loc_reset(&oloc); + oloc.file = f; + oloc.addr = obj_addr; + + /* Open and copy the dataset's dataspace */ + if(NULL == (space = H5S_read(&oloc))) + HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, FAIL, "not found") + + /* Unserialize the selection */ + if(H5S_SELECT_DESERIALIZE(&space, &p) < 0) + HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, FAIL, "can't deserialize selection") + + *space_ptr = space; + } + if(obj_addr_ptr) + *obj_addr_ptr = obj_addr; + +done: + H5MM_free(data); + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5R__decode_addr_region_compat() */ |