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-rw-r--r--src/H5HFhuge.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/H5HFhuge.c b/src/H5HFhuge.c
index 623210d..198ef62 100644
--- a/src/H5HFhuge.c
+++ b/src/H5HFhuge.c
@@ -708,6 +708,81 @@ done:
/*-------------------------------------------------------------------------
+ * Function: H5HF_huge_write
+ *
+ * Purpose: Write a 'huge' object to the heap
+ *
+ * Note: This implementation somewhat limited: it doesn't handle
+ * heaps with filters, which would require re-compressing the
+ * huge object and probably changing the address of the object
+ * on disk (and possibly the heap ID for "direct" huge IDs).
+ *
+ * Return: SUCCEED/FAIL
+ *
+ * Programmer: Quincey Koziol
+ * koziol@hdfgroup.org
+ * Feb 21 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
+ const void *obj)
+{
+ haddr_t obj_addr; /* Object's address in the file */
+ size_t obj_size; /* Object's size in the file */
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI_NOINIT(H5HF_huge_write)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(hdr);
+ HDassert(id);
+ HDassert(obj);
+
+ /* Check for filters on the heap */
+ if(hdr->filter_len > 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "modifying 'huge' object with filters not supported yet")
+
+ /* Skip over the flag byte */
+ id++;
+
+ /* Check for 'huge' object ID that encodes address & length directly */
+ if(hdr->huge_ids_direct) {
+ /* Retrieve the object's address and length (common) */
+ H5F_addr_decode(hdr->f, &id, &obj_addr);
+ H5F_DECODE_LENGTH(hdr->f, id, obj_size);
+ } /* end if */
+ else {
+ H5HF_huge_bt2_indir_rec_t found_rec; /* Record found from tracking object */
+ H5HF_huge_bt2_indir_rec_t search_rec; /* Record for searching for object */
+
+ /* Get ID for looking up 'huge' object in v2 B-tree */
+ UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
+
+ /* Look up object in v2 B-tree */
+ if(H5B2_find(hdr->f, dxpl_id, H5HF_BT2_INDIR, hdr->huge_bt2_addr,
+ &search_rec, H5HF_huge_bt2_indir_found, &found_rec) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
+
+ /* Retrieve the object's address & length */
+ obj_addr = found_rec.addr;
+ H5_ASSIGN_OVERFLOW(/* To: */ obj_size, /* From: */ found_rec.len, /* From: */ hsize_t, /* To: */ size_t);
+ } /* end else */
+
+ /* Write the object's data to the file */
+ /* (writes directly from application's buffer) */
+ if(H5F_block_write(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, obj_size, dxpl_id, obj) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "writing 'huge' object to file failed")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_huge_write() */
+
+
+/*-------------------------------------------------------------------------
* Function: H5HF_huge_read
*
* Purpose: Read a 'huge' object from the heap