dxget.pro
2.96 KB
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;+
; NAME:
; DXGET
;
; AUTHOR:
; Craig B. Markwardt, NASA/GSFC Code 662, Greenbelt, MD 20770
; craigm@lheamail.gsfc.nasa.gov
;
; PURPOSE:
; Gets IDL variable from a different IDL call level
;
; CALLING SEQUENCE:
; RESULT = DXGET('NAME') ; quoted variable name (OR)
; RESULT = DXGET(NAME) ; unquoted variable name
;
; DESCRIPTION:
;
; DXGET retrieves a variable value from any point in the IDL call
; stack. The DXGET and DXSET routines allow any variable at any
; level to be examined and changed.
;
; The call level to be examined is determined by the current
; debugging "focus." By default this is the deepest level in the
; call stack -- where the breakpoint occurred. However, this level
; can be changed by using the DXUP and DXDOWN procedures.
;
; If the variable doesn't exist, then an error message is reported.
;
; INPUTS:
;
; NAME - the name of the variable, either quoted or unquoted.
;
; KEYWORDS:
;
; LEVEL - the call level to be examined, if not the current
; debugging focus.
;
; EXAMPLE:
;
; value = dxget('a')
;
; Retrieve the value of the variable A from the debugged call level.
;
; SEE ALSO:
;
; DXGET, DXSET, DXUP, DXDOWN
;
; MODIFICATION HISTORY:
; Written, 15 Apr 2000
;
; $Id: dxget.pro,v 1.2 2001/02/09 04:57:16 craigm Exp $
;
;-
; Copyright (C) 2000, Craig Markwardt
; This software is provided as is without any warranty whatsoever.
; Permission to use, copy, modify, and distribute modified or
; unmodified copies is granted, provided this copyright and disclaimer
; are included unchanged.
;-
function dxget, vname, level=level0, status=status
@dxcommon.pro
status = 0
if n_params() LT 1 then begin
USAGE_MESSAGE:
print, "USAGE:"
print, " VALUE = dxget('NAME') ; named variable"
print, " VALUE = dxget( NAME ) ; without quotes"
return, 0
endif
if n_elements(level0) EQ 0 then level0=dblevel
level = floor(level0(0))
pass = 1
;; Retrieve variable name
sz = size(vname)
if sz(sz(0)+1) EQ 7 then begin
name = vname(0)
endif else begin
RETRY_NAME:
thislev = routine_names(/level)
name = routine_names(vname, arg_name=thislev-1)
if n_elements(name) LT 1 then goto, USAGE_MESSAGE
name = name(0)
endelse
if name EQ '' then goto, USAGE_MESSAGE
name = strupcase(name)
vars = routine_names(variables=level)
wh = where(name EQ vars, ct)
if ct EQ 0 then begin
if pass EQ 2 then begin
print, 'ERROR: Variable '+name+' does not exist at level '+ $
strtrim(level, 2)
return, 0
endif
pass = pass + 1
goto, RETRY_NAME
endif
catch, catcherr
if catcherr NE 0 then begin
catch, /cancel
print, 'ERROR: '+name+' could not be set'
return, 0
endif
sz = size(routine_names(name, fetch=level))
if sz(sz(0)+1) EQ 0 then begin
print, 'ERROR: '+name+' is undefined'
return, 0
endif
value = routine_names(name, fetch=level)
status = 1
return, value
end