;+ ; NAME: ; NCDF_ISVALIDFILE ; ; PURPOSE: ; ; Utility routine to determine if a file is a valid netCDF file or not. ; Returns a 1 if the file is valid and a 0 otherwise. ; ; 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: ; ; result = NCDF_IsValidFile(filename) ; ; INPUTS: ; ; filename: The name of a filename to open to see if it is a valid netCDF file. ; ; RETURN VALUE: ; ; result: A 1 if the file can be opened as a netCDF file. A 0 otherwise. ; ; KEYWORDS: ; ; None. ; ; ALGORITHM: ; ; Try to open the file. If you fail, it is not an netCDF file. ; ; MODIFICATION HISTORY: ; ; Written by: David W. Fanning, 21 February 2010. ;- ;******************************************************************************************; ; Copyright (c) 2010, 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 NCDF_IsValidFile, filename Compile_Opt idl2 Catch, theError IF theError NE 0 THEN BEGIN Catch, /CANCEL RETURN, 0 ENDIF ; Need a filename. IF N_Elements(filename) EQ 0 THEN BEGIN filename = Dialog_Pickfile(TITLE='Select a File', FILTER=['*.nc','*.ncdf']) IF filename EQ "" THEN RETURN, 0 ENDIF ; Try to open the file. If you succeed, file is valid. fileID = NCDF_Open(filename) NCDF_Close, fileID RETURN, 1 END