updf_get_free_pagesΒΆ
updf_get_free_pages returns the number of unused pages in a UPDF file.
-
nPages = updf_get_free_pages(stg)
Return Value
nPages number of unused pages.
Parameters
-
stg stg is a storage object (see updf_create_file, updf_open_file, updf_create_storage).
Comment
A UPDF file consists of pages with a size 1024 bytes each. If pages are deleted
the pages are set to empty and can be used again. If the file was created with
the UPDF_REPACKING flag the free pages will be removed when the document will
be closed. The packing process leads to performance loss if a large number of
free pages exist. In this case it mach faster to copy the storages and streams
into a new file using updf_copy_to.
History
| Version | Description |
|---|---|
| R2013 (5.50) | New. |
See also
id-1760231