Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/~tghosh/software/pcheck.pro Дата изменения: Fri Jan 24 19:20:37 2003 Дата индексирования: Sun Apr 10 04:43:39 2016 Кодировка: Поисковые слова: trifid nebula

;Viewing contents of file
;'/net/www/deutsch/idl/idllib/contrib/icur/pcheck.pro'
;
;************************************************************************
;+
;
;*NAME:
;
; PCHECK
;
;*CLASS:
;
;*CATEGORY:
;
;*PURPOSE:
;
; This procedure is used to check the parameters of
; a procedure for correct type and dimensions
;
;*CALLING SEQUENCE:
;
; PCHECK,VARIABLE,POSITION,DIMENSION,TYPE
;
;*PARAMETERS:
;
; VARIABLE - Variable to be checked
; POSITION - Parameter position of the variable
; DIMENSION - Valid dimensions (3 digit integer).
; Each digit must be 0 or 1.
; 1 specifies that the dimension is valid.
;
; 1st digit - scalar
; 2nd - one dimensional array
; 3rd - two dimensional array
;
; TYPE - Valid types ( 4 digit integer).
; Each digit must be 0 or 1.
; 1 specifies a valid type.
;
; 1st digit - string
; 2nd - byte
; 3rd - integer, or longword integer
; 4th - floating point, double precision or complex
;
;*EXAMPLES:
;
;*SYSTEM VARIABLES USED:
;
;*INTERACTIVE INPUT:
;
;*SUBROUTINES CALLED:
;
;*FILES USED:
;
;*SIDE EFFECTS:
;
;*RESTRICTIONS:
;
;*NOTES:
;
; tested with IDL Version 2.1.0 (sunos sparc) 28 Jun 91
; tested with IDL Version 2.1.0 (ultrix mipsel) N/A
; tested with IDL Version 2.1.0 (vax vms) 28 Jun 91
;
;*PROCEDURE:
;
;*I_HELP nn:
;
;*MODIFICATION HISTORY:
;
; d. lindler dec. 1980
; version 2 f.h.schiffer 3rd 17 nov 1981
; copied into [177001] by rwt 1-17-84
; 10-24-85 rwt modify for new didl data types: longword integer,
; double precision & complex. modified to be compatible
; with existing version (i.e., no new input parameters)
; 21-sep-88: converted to sun idl, john hoegy.
; 10 May 91 PJL created a RDAF format prolog
; 28 Jun 91 PJL added npar test; tested on SUN and VAX; updated prolog
;
;-
;*************************************************************************
pro pcheck,variable,position,dimension,type
;
npar = n_params(0)
if npar eq 0 then begin
print,'PCHECK,VARIABLE,POSITION,DIMENSION,TYPE'
retall
endif ; npar
;
; decode valid dimensions
;
vdim = bytarr(3)
idim = dimension
for i = 0,2 do begin
itemp = idim / 10*10
vdim(2 - i) = idim - itemp
idim = idim / 10
endfor ; i
;
; decode valid types
;
itype = fix(type)
vtype = bytarr(4)
for i = 0,3 do begin
itemp = itype / 10*10
vtype(i) = itype - itemp
itype = itype / 10
endfor ; i
;
; determine type and dimension of the input variable
;
s = size(variable)
ndim = s(0)
ntype = s(ndim + 1)
;
; check if it is defined
;
if ntype eq 0 then begin
print,' Input variable number',position,' is not defined'
goto,explain
endif ; ntype eq 0
;
; check for valid type
;
if (ntype eq 7) and ( vtype(3) ne 0 ) then goto,checkd ;string
if (ntype eq 1) and ( vtype(2) ne 0 ) then goto,checkd ;byte
if (ntype eq 2) and ( vtype(1) ne 0 ) then goto,checkd ;integer
if (ntype eq 3) and ( vtype(1) ne 0 ) then goto,checkd ;longword integer
if (ntype eq 4) and ( vtype(0) ne 0 ) then goto,checkd ;floating pt.
if (ntype eq 5) and ( vtype(0) ne 0 ) then goto,checkd ;double precision
if (ntype eq 6) and ( vtype(0) ne 0 ) then goto,checkd ;complex
;
print,'The parameter in position',position,' is of invalid type'
goto,explain
;
;
; check for a valid dimension
;
checkd: if vdim(ndim) ne 0 then return
print,'Input variable in position',position,' has wrong dimension'
;
; give correct type(s) and dimensions
;
explain:
tmsg=' The valid type(s) are: '
if vtype(3) ne 0 then tmsg = tmsg + ' string '
if vtype(2) ne 0 then tmsg = tmsg + ' byte '
if vtype(1) ne 0 then tmsg = tmsg + ' integer '
if vtype(0) ne 0 then tmsg = tmsg + ' floating point '
print,tmsg
;
tmsg=' The valid dimensions are:'
if vdim(2) ne 0 then tmsg = tmsg + ' 2-d '
if vdim(1) ne 0 then tmsg = tmsg + ' 1-d '
if vdim(0) ne 0 then tmsg = tmsg + ' scalar'
print,tmsg
print,'Type .con or retall to continue'
stop
;
retall
end ; pcheck