.\" $Id: TIFFSetDirectory.3tiff,v 1.4 2017-06-30 17:40:02 erouault Exp $
.\"
.\" Copyright (c) 1988-1997 Sam Leffler
.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
.\"
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.if n .po 0
.TH TIFFSetDirectory 3TIFF "October 15, 1995" "libtiff"
.SH NAME
TIFFSetDirectory, TIFFSetSubDirectory \- set the current directory for an open
.SM TIFF
file
.SH SYNOPSIS
.B "#include <tiffio.h>"
.sp
.BI "int TIFFSetDirectory(TIFF *" tif ", tdir_t " dirnum ")"
.br
.BI "int TIFFSetSubDirectory(TIFF *" tif ", uint64 " diroff ")"
.SH DESCRIPTION
.I TIFFSetDirectory
changes the current directory and reads its contents with
.IR TIFFReadDirectory .
The parameter
.I dirnum
specifies the subfile/directory as an integer number, with the first directory
numbered zero.
.PP
.I TIFFSetSubDirectory
acts like 
.IR TIFFSetDirectory ,
except the directory is specified as a file offset instead of an index; this
is required for accessing subdirectories linked through a
.I SubIFD
tag.
.SH "RETURN VALUES"
On successful return 1 is returned. Otherwise, 0 is returned if 
.I dirnum
or
.I diroff
specifies a non-existent directory, or if an error was encountered while
reading the directory's contents.
.SH DIAGNOSTICS
All error messages are directed to the
.IR TIFFError (3TIFF)
routine.
.PP
.BR "%s: Error fetching directory count" .
An error was encountered while reading the ``directory count'' field.
.PP
.BR "%s: Error fetching directory link" .
An error was encountered while reading the ``link value'' that points to the
next directory in a file.
.SH "SEE ALSO"
.IR TIFFCurrentDirectory (3TIFF),
.IR TIFFOpen (3TIFF),
.IR TIFFReadDirectory (3TIFF),
.IR TIFFWriteDirectory (3TIFF),
.IR libtiff (3TIFF)
.PP
Libtiff library home page:
.BR http://www.simplesystems.org/libtiff/