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TIFFSetDirectory
================
Synopsis
--------
.. highlight:: c
::
#include <tiffio.h>
.. c:function:: int TIFFSetDirectory(TIFF* tif, tdir_t dirnum)
.. c:fucntion:: int TIFFSetSubDirectory(TIFF* tif, uint64_t diroff)
Description
-----------
:c:func:`TIFFSetDirectory` changes the current directory and reads its
contents with :c:func:`TIFFReadDirectory`. The parameter *dirnum*
specifies the subfile/directory as an integer number, with the first
directory numbered zero.
:c:func:`TIFFSetSubDirectory` acts like :c:func:`TIFFSetDirectory`,
except the directory is specified as a file offset instead of an index;
this is required for accessing subdirectories linked through a
``SubIFD`` tag.
Return values
-------------
On successful return 1 is returned. Otherwise, 0 is returned if *dirnum*
or *diroff* specifies a non-existent directory, or if an error was
encountered while reading the directory's contents.
Diagnostics
-----------
All error messages are directed to the :c:func:`TIFFError` routine.
``"%s: Error fetching directory count"``:
An error was encountered while reading the "directory count" field.
``"%s: Error fetching directory link"``:
An error was encountered while reading the "link value" that points to the
next directory in a file.
See also
--------
:doc:`TIFFCurrentDirectory` (3tiff),
:doc:`TIFFOpen` (3tiff),
:doc:`TIFFReadDirectory` (3tiff),
:doc:`TIFFWriteDirectory` (3tiff),
:doc:`libtiff` (3tiff),
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