source: trunk/SRC/ToBeReviewed/STRING/getfile.pro @ 186

;-------------------------------------------------------------
;+
;
; @file_comments
; Read a text file into a string array.
;
; @param filein {in}{required}
; text file name.
; 
; @Keyword ERROR
; =err  error flag: 0=ok, 1=file not opened,
; 2=no lines in file.
;         
; @keyword QUIET 
; means give no error message.
;         
; @keyword LINES
; =n  Number of lines to read (def=all).
; Much faster if number of lines is known.
; Automatic for IDL 5.6 or later.
;         
; @keyword FIND 
; search the file in the all !path directories (use
; find.pro)
;
; @keyword HELP
; 
; @returns
; 
; @history
;       R. Sterner, 20 Mar, 1990
;       R. Sterner, 1999 Apr 14 --- Added LINES=n keyword.
;       R. Sterner, 2003 Aug 29 --- Automatic lines if IDL 5.6+.
;       R. Sterner, 2003 Sep 02 --- Check if file exists first.
;       R. Sterner, 2003 Sep 04 --- Fixed error in number of lines in file.
;       R. Sterner, 2003 Oct 10 --- Fixed error when no lines.
;       R. Sterner, 2004 Jan 27 --- Fixed to work in IDL as old as vers 4.
;
;       S. Masson (smasson\@lodyc.jussieu.fr) 4 Feb 2002
;       search te file in the all !path directories (use find.pro)
;       when using /find keyword. Use spawn, 'cat...' for unix os.
;
; Copyright (C) 1990, Johns Hopkins University/Applied Physics Laboratory
; This software may be used, copied, or redistributed as long as it is not
; sold and this copyright notice is reproduced on each copy made.  This
; routine is provided as is without any express or implied warranties
; whatsoever.  Other limitations apply as described in the file disclaimer.txt.
;
; @version
; $Id$
;
;-
;-------------------------------------------------------------
 
        function getfile, filein, error=err, help=hlp, quiet=quiet, lines=lines, find = find
;
  compile_opt idl2, strictarrsubs
;
 
        if (n_params(0) lt 1) or keyword_set(hlp) then begin
          print,' Read a text file into a string array.'
          print,' s = getfile(f)'
          print,'   f = text file name.      in'
          print,'   s = string array.        out'
          print,' Keywords:'
          print,'   ERROR=err  error flag: 0=ok, 1=file not opened,'
          print,'     2=no lines in file.'
          print,'   /QUIET means give no error message.'
          print,'   LINES=n  Number of lines to read (def=all).'
          print,'     Much faster if number of lines is known.'
          print,'     Automatic for IDL 5.6 or later.'
          return, -1
        endif
;
        if keyword_set(find) then begin
          file = find(filein)
          file = file[0]
          if file EQ 'NOT FOUND' then begin
            print, ' Error in getfile: File '+filein+' not fouond.'
            return, -1
          endif
        ENDIF ELSE file = filein
        if !version.os_family EQ 'unix' then begin
          spawn, 'cat '+file,  res
          if res[0] NE '' then return, res ELSE return, ''
        endif
        
        if (!version.release+0. ge 5.5) then begin
          f = call_function('file_search', file, count = c)
        endif else begin
          f = findfile(file,count=c)
        endelse
        if c eq 0 then begin
          err = 1
          return,''
        endif
 
        if n_elements(line) eq 0 and (!version.release+0. ge 5.6) then begin
          lines = file_lines(file)
          if lines eq 0 then begin
            if not keyword_set(quiet) then print,' No lines in file.'
            err = 2
            return,-1
          endif
          minlines = 0
        endif else minlines=1
 
        get_lun, lun
        on_ioerror, err
        openr, lun, file
 
        if n_elements(lines) ne 0 then begin
          s = strarr(lines)
          readf,lun,s
        endif else begin
          s = [' ']
          t = ''
          while not eof(lun) do begin
            readf, lun, t
            s = [s,t]
          endwhile
        endelse
 
        close, lun
        free_lun, lun
        if n_elements(s) eq minlines then begin
          if not keyword_set(quiet) then print,' No lines in file.'
          err = 2
          return,-1
        endif
        if minlines eq 1 then s=s[1:*]
 
        err = 0
        return, s
 
err:    if !err eq -168 then begin
          if not keyword_set(quiet) then print,' Non-standard text file format.'
          free_lun, lun
          return, s
        endif
        if not keyword_set(quiet) then print,$
          ' Error in getfile: File '+file+' not opened.'
        free_lun, lun
        err = 1
        return, -1
 
        end