FUNCTION dustem_read_qabs_lv,file,silent=silent,read_densities=read_densities

;stop

st=''
Nmax=10000L
sts=strarr(Nmax)
openr,unit,file,/get_lun

;==read comments
str='' & first_char='#'
WHILE first_char EQ '#' DO BEGIN
  readf,unit,str
  first_char=strmid(str,0,1)
ENDWHILE

;read number of sizes
Nsizes=fix(str)

;Get sizes
readf,unit,st
sizes=float(str_sep(strcompress(strtrim(st,2)),' '))
Ncol=Nsizes

IF keyword_set(read_densities) THEN BEGIN
  readf,unit,st
  ;stop
  IF st EQ '#### Qabs ####' THEN BEGIN
    message,'Problem with size dependent densities in Qabs.DAT',/continue
    ;stop
  ENDIF
  densities=float(str_sep(strcompress(strtrim(st,2)),' '))
ENDIF ELSE BEGIN
  densities=fltarr(Nsizes)+la_undef()
ENDELSE
;stop

;==read comments
str='' & first_char='#'
WHILE first_char EQ '#' DO BEGIN
  readf,unit,str
  first_char=strmid(str,0,1)
ENDWHILE

;== read Qabs
sts[0]=str
nlines=1L
first_char=' '
WHILE first_char NE '#' DO BEGIN
    readf,unit,st
    sts(nlines)=st
    nlines=nlines+1
    first_char=strmid(st,0,1)
ENDWHILE
qabs_str=sts[0:nlines-2]
;stop

;==read comments
str='' & first_char='#'
WHILE first_char EQ '#' DO BEGIN
  readf,unit,str
  first_char=strmid(str,0,1)
ENDWHILE

;== read Qsca
sts(*)=''
sts(0)=str
nlines=1L
first_char=' '
WHILE not eof(unit) and first_char NE '#' DO BEGIN
    readf,unit,st
    sts(nlines)=st
    nlines=nlines+1
    first_char=strmid(st,0,1)
ENDWHILE
close,unit
free_lun,unit

qsca_str=sts(0:nlines-1)
;stop

Nlines=n_elements(qsca_str)

qabs_values=fltarr(Nlines,Ncol)
qsca_values=fltarr(Nlines,Ncol)
;stop
FOR i=0L,Nlines-2 DO BEGIN
  qabs_values(i,*)=str_sep(strcompress(strtrim(qabs_str(i),2)),' ')
  qsca_values(i,*)=str_sep(strcompress(strtrim(qsca_str(i),2)),' ')
ENDFOR

;== Make output structure
cmd='one_st={'
FOR i=0L,Ncol-1 DO BEGIN
  cmd=cmd+'v'+strtrim(i+1,2)+':'+'0.'
  IF i NE Ncol-1 THEN BEGIN
    cmd=cmd+','
  ENDIF ELSE BEGIN
    cmd=cmd+'}'
  ENDELSE
ENDFOR
toto=execute(cmd)
qabs_st=replicate(one_st,Nlines)
qsca_st=replicate(one_st,Nlines)

;=== fill in the qabs structure
FOR j=0L,Ncol-1 DO BEGIN
  qabs_st.(j)=reform(qabs_values(*,j))
  qsca_st.(j)=reform(qsca_values(*,j))
ENDFOR

full_st={file:file,Nsizes:Nsizes,sizes:sizes,densities:densities,Qabs:qabs_st,Qsca:qsca_st}

return,full_st

END