/usr/share/gnudatalanguage/coyote/dirpath.pro is in gdl-coyote 2016.11.13-2.
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; NAME:
; DIRPATH
;
; PURPOSE:
;
; The purpose of this function is to return a device-independent
; name of a directory. It is similar to the IDL-supplied FILEPATH
; routine, except that a file name is not required.
;
; AUTHOR:
;
; FANNING SOFTWARE CONSULTING
; David Fanning, Ph.D.
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
;
; CATEGORY:
;
; Utility.
;
; CALLING SEQUENCE:
;
; IDL> theDirectory = DIRPATH('examples')
; IDL> Print, theDirectory
; C:\IDL\IDL56\examples
;
; INPUTS:
;
; subDirectory: This is a string argument containing the name of the
; sub-directory you wish to use. It can be a string
; array of sub-directory names. By default, the subDirectory
; is set to ['examples', 'data']. To only return the Root_Directory,
; set the subDirectory to a null string ("").
;
; KEYWORDS:
;
; ROOT_DIRECTORY: The name of the root directory to use. By default,
; the root directory is set to !DIR.
;
; OUTPUTS:
;
; The machine-independent directory path.
;
; MODIFICATION HISTORY:
;
; Written by: David W. Fanning, 28 April 2003.
;-
;******************************************************************************************;
; Copyright (c) 2008, by Fanning Software Consulting, Inc. ;
; All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
FUNCTION DirPath, subdirectory, RootDirectory=rootdirectory
; Returns the name of a directory in the spirit of FILEPATH.
; rootdirectory - The name of the root directory where subdirectories branch.
; Use !Dir by default.
;
; subdirectory - The name of a subdirectory. Use string array to specify path of
; multiple subdirectories. If absent, uses ['examples', 'data'].
; Catch the error. If something goes wrong, return the current directory.
Forward_Function cgErrorMsg
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /Cancel
ok = cgErrorMsg(/Traceback)
CD, Current=currentDir
Return, currentDir
ENDIF
; Check for arguments. Define defaults, if necessary.
IF N_Elements(rootdirectory) EQ 0 THEN rootdirectory = !Dir
IF N_Elements(subdirectory) EQ 0 THEN subdirectory = ['examples', 'data']
; Use FILEPATH to construct a device-independent file name. Strip the directory
; information from that and return it.
source = FilePath(Root_Dir=rootdirectory, SubDirectory=subdirectory, 'junk.pro')
directory = Strmid(source, 0, Strpos(source, Path_Sep(), /REVERSE_SEARCH))
RETURN, directory
END
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