/usr/share/gnudatalanguage/coyote/cgfindpathto.pro is in gdl-coyote 2016.11.13-2.
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;
; NAME:
; cgFindPathTo
;
; PURPOSE:
; The purpose of this function is to search for a file, primarily in "resources"
; directories. It might be used, for example, to find the name of bitmap files to
; use as widget button values.
;
;******************************************************************************************;
; ;
; Copyright (c) 2014, 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. ;
;******************************************************************************************;
;
;+
; The purpose of this function is to search for a file, primarily in "resources"
; directories. It might be used, for example, to find the name of bitmap files to
; use as widget button values. This program can be slow, depending upon how many
; directories it has to search. If you are looking for a *.pro file, it will probably
; be faster to search for the file with File_Which. This routine is primarily used to
; search for files without *.pro file extensions in places outside the normal IDL path.
; Namely in "resources" directories that may reside in the main IDL directory structure
; or may reside in your own application that you have built with IDL. The order of
; search is as follows::
;
; 1. In the current directory.
; 2. In the same directory as this file is found in.
; 3. In the directories rooted at the IDL resource directory (IDL_DIR/resource).
; 4. In the directories rooted at a resources directory found in the same directory this file is in.
; 5. In the directories rooted at a resourcs directory found in the same directory this file is in.
; 6. In the directories rooted at a resources directory found in the a directory one above the directory this file is in.
; 7. In the directories rooted at a resource directory found in the a directory one above the directory this file is in.
; 8. Anywhere in the IDL PATH. Note that a *.pro file *must* be in a directory for the directory to be on
; the IDL PATH.
;
; :Categories:
; Utilities
;
; :Params:
; filename: in, required, type=string
; The root name of the file you are searching for. For example, 'arrow.bmp'.
; Do not use a full path name to the file.
;
; :Keywords:
; success: out, optional, type=boolean
; On output, this keyword contains a 1 if the file was found, and a 0 otherwise.
;
; :Examples:
; Here is how to use this program::
; IDL> Print, cgFindPathTo('gshhs_i.b', success=s) & Print, 'success: ', s
; /home/fanning/IDL/incubator/gshhs_i.b
; success: 1
; IDL> Print, cgFindPathTo('dataviewer_splash.jpg', success=s) & print, 'success: ', s
; /home/fanning/IDL/dataviewer/resources/dataviewer_splash.jpg
; success: 1
; IDL> Print, cgFindPathTo('arc.bmp', success=s) & Print, 'success: ', s
; /usr/local/rsi/idl70/resource/bitmaps/arc.bmp
; success: 1
; IDL> Print, cgFindPathTo('toast_and_jam.txt', success=s) & Print, 'success: ', s
; success: 0
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 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
;
; :History:
; Change History::
; Written, 15 January 2014 by David W. Fanning.
;
; :Copyright:
; Copyright (c) 2014, Fanning Software Consulting, Inc.
;-
FUNCTION cgFindPathTo, filename, SUCCESS=success
Compile_Opt idl2
; Error handling
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
success = 0
RETURN, ""
ENDIF
; Assume defeat. :-(
success = 0
; Require the name of a file resource.
IF N_Elements(filename) EQ 0 THEN Message, 'The base name of the resource file is required.'
filename = File_BaseName(filename)
; Look in the current directory first.
CD, Current=thisDir
resourceName = Filepath(ROOT_DIR=thisDir, filename)
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
; Look in the same directory this program is found in.
thisDir = cgSourceDir()
resourceName = Filepath(ROOT_DIR=thisDir, filename)
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
; Look in the IDL resource directory
resourceDir = Filepath(ROOT_DIR=!Dir, SUBDIRECTORY='resource', "")
resourceName = File_Search(resourceDir, filename, COUNT=count)
IF count GE 0 THEN BEGIN
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look in the directory where the program that *called* this program lives.
HELP, CALLS=calls
callingRoutine = (StrSplit(calls[1], /EXTRACT))[0]
IF callingRoutine NE '$MAIN$' THEN BEGIN
longPath = File_Which(StrLowCase(callingRoutine) + '.pro')
thisDir = File_Dirname(longpath)
resourceName = File_Search(thisDir, filename, COUNT=count)
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look for a file in a resources directory, rooted on this directory.
thisDir = cgSourceDir()
resourceDir = Filepath(ROOT_DIR=thisDir, SUBDIRECTORY='resources', "")
resourceName = File_Search(resourceDir, filename, COUNT=count)
IF count GE 0 THEN BEGIN
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look for a file in a resource directory, rooted on this directory.
thisDir = cgSourceDir()
resourceDir = Filepath(ROOT_DIR=thisDir, SUBDIRECTORY='resource', "")
resourceName = File_Search(resourceDir, filename, COUNT=count)
IF count GE 0 THEN BEGIN
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look for a file in a resources directory, rooted oneup from this directory.
thisDir = cgSourceDir(/ONEUP)
resourceDir = Filepath(ROOT_DIR=thisDir, SUBDIRECTORY='resources', "")
resourceName = File_Search(resourceDir, filename, COUNT=count)
IF count GE 0 THEN BEGIN
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look for a file in a resources directory, rooted oneup from this directory.
thisDir = cgSourceDir(/ONEUP)
resourceDir = Filepath(ROOT_DIR=thisDir, SUBDIRECTORY='resource', "")
resourceName = File_Search(resourceDir, filename, COUNT=count)
IF count GE 0 THEN BEGIN
resourceName = resourceName[0]
IF File_Test(resourceName, /REGULAR, /READ) THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDIF
; Look for the file in the IDL PATH.
directories = Expand_Path(!PATH, /ARRAY)
FOR j=0L, N_Elements(directories)-1 DO BEGIN
resourceName = File_Which(directories[j], filename, /INCLUDE_CURRENT_DIR)
resourceName = resourceName[0]
IF resourceName NE "" THEN BEGIN
success = 1
RETURN, resourceName
ENDIF
ENDFOR
; If we didn't find anything, return a null string.
IF success EQ 0 THEN resourceName = ""
RETURN, resourceName
END
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