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-rw-r--r--src/H5Olayout.c118
1 files changed, 115 insertions, 3 deletions
diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index d8f05f0..5e9507b 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -548,8 +548,11 @@ done:
static herr_t
H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, const void *_mesg)
{
- const H5O_layout_t *mesg = (const H5O_layout_t *) _mesg;
- unsigned u;
+ const H5O_layout_t *mesg = (const H5O_layout_t *) _mesg;
+ uint8_t *heap_block = NULL;
+ size_t *str_size = NULL;
+ unsigned u;
+ H5F_libver_t saved_low, saved_high;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_STATIC
@@ -566,6 +569,9 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
/* Layout class */
*p++ = mesg->type;
+ saved_low = H5F_LOW_BOUND(f);
+ saved_high = H5F_HIGH_BOUND(f);
+
/* Write out layout class specific information */
switch(mesg->type) {
case H5D_COMPACT:
@@ -673,7 +679,107 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
break;
case H5D_VIRTUAL:
- /* Encode heap ID for VDS info */
+ /* Create heap block if it has not been created yet */
+ /* Note that we assume here that the contents of the heap block
+ * cannot change! If this ever stops being the case we must change
+ * this code to allow overwrites of the heap block. -NAF */
+
+ if((mesg->storage.u.virt.serial_list_hobjid.addr == HADDR_UNDEF)
+ && (mesg->storage.u.virt.list_nused > 0)) {
+ uint8_t *heap_block_p;
+ size_t block_size;
+ hssize_t select_serial_size;
+ hsize_t tmp_hsize;
+ uint32_t chksum;
+ size_t i;
+
+ if(H5F_set_libver_bounds(f, H5F_LIBVER_V110, H5F_LIBVER_V110) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "cannot set low/high bounds")
+
+ /* Allocate array for caching results of strlen */
+ if(NULL == (str_size = (size_t *)H5MM_malloc(2 * mesg->storage.u.virt.list_nused *sizeof(size_t))))
+ HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate string length array")
+
+ /*
+ * Calculate heap block size
+ */
+ /* Version and number of entries */
+ block_size = (size_t)1 + H5F_SIZEOF_SIZE(f);
+
+ /* Calculate size of each entry */
+ for(i = 0; i < mesg->storage.u.virt.list_nused; i++) {
+ HDassert(mesg->storage.u.virt.list[i].source_file_name);
+ HDassert(mesg->storage.u.virt.list[i].source_dset_name);
+ HDassert(mesg->storage.u.virt.list[i].source_select);
+ HDassert(mesg->storage.u.virt.list[i].source_dset.virtual_select);
+
+ /* Source file name */
+ str_size[2 * i] = HDstrlen(mesg->storage.u.virt.list[i].source_file_name) + (size_t)1;
+ block_size += str_size[2 * i];
+
+ /* Source dset name */
+ str_size[(2 * i) + 1] = HDstrlen(mesg->storage.u.virt.list[i].source_dset_name) + (size_t)1;
+ block_size += str_size[(2 * i) + 1];
+
+ /* Source selection */
+ if((select_serial_size = H5S_SELECT_SERIAL_SIZE(mesg->storage.u.virt.list[i].source_select, f)) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
+ block_size += (size_t)select_serial_size;
+
+ /* Virtual dataset selection */
+ if((select_serial_size = H5S_SELECT_SERIAL_SIZE(mesg->storage.u.virt.list[i].source_dset.virtual_select, f)) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
+ block_size += (size_t)select_serial_size;
+ } /* end for */
+
+ /* Checksum */
+ block_size += 4;
+
+ /* Allocate heap block */
+ if(NULL == (heap_block = (uint8_t *)H5MM_malloc(block_size)))
+ HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate heap block")
+
+ /*
+ * Encode heap block
+ */
+ heap_block_p = heap_block;
+
+ /* Encode heap block encoding version */
+ *heap_block_p++ = (uint8_t)H5O_LAYOUT_VDS_GH_ENC_VERS;
+
+ /* Number of entries */
+ tmp_hsize = (hsize_t)mesg->storage.u.virt.list_nused;
+ H5F_ENCODE_LENGTH(f, heap_block_p, tmp_hsize)
+
+ /* Encode each entry */
+ for(i = 0; i < mesg->storage.u.virt.list_nused; i++) {
+ /* Source file name */
+ (void)HDmemcpy((char *)heap_block_p, mesg->storage.u.virt.list[i].source_file_name, str_size[2 * i]);
+ heap_block_p += str_size[2 * i];
+
+ /* Source dataset name */
+ (void)HDmemcpy((char *)heap_block_p, mesg->storage.u.virt.list[i].source_dset_name, str_size[(2 * i) + 1]);
+ heap_block_p += str_size[(2 * i) + 1];
+
+ /* Source selection */
+ if(H5S_SELECT_SERIALIZE(mesg->storage.u.virt.list[i].source_select, &heap_block_p, f) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize source selection")
+
+ /* Virtual selection */
+ if(H5S_SELECT_SERIALIZE(mesg->storage.u.virt.list[i].source_dset.virtual_select, &heap_block_p, f) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize virtual selection")
+ } /* end for */
+
+ /* Checksum */
+ chksum = H5_checksum_metadata(heap_block, block_size - (size_t)4, 0);
+ UINT32ENCODE(heap_block_p, chksum)
+
+ /* Insert block into global heap */
+ if(H5HG_insert(f, block_size, heap_block, &((H5O_layout_t *)mesg)->storage.u.virt.serial_list_hobjid) < 0) /* Casting away const OK --NAF */
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to insert virtual dataset heap block")
+ } /* end if */
+
+ /* Heap information */
H5F_addr_encode(f, &p, mesg->storage.u.virt.serial_list_hobjid.addr);
UINT32ENCODE(p, mesg->storage.u.virt.serial_list_hobjid.idx);
break;
@@ -685,6 +791,12 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
} /* end switch */
done:
+ if(H5F_set_libver_bounds(f, saved_low, saved_high) < 0)
+ HDONE_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "cannot reset low/high bounds")
+
+ heap_block = (uint8_t *)H5MM_xfree(heap_block);
+ str_size = (size_t *)H5MM_xfree(str_size);
+
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5O__layout_encode() */