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function dispfiles(unit)
[lhs,rhs]=argn()
if rhs==0 then
[units,typ,nams,mod,swap]=file()
else
units=[],typ=[],nams=[],mod=[],swap=[]
for k=1:size(unit,'*')
[uk,tk,nk,mk,sk]=file(unit(k))
units=[units;uk],
typ=[typ;tk],
nams=[nams;nk],
mod=[mod;mk],
swap=[swap;sk]
end
end
n=size(units,'*')
info=emptystr(n,1)
for k=1:n
if units(k)==5 then nams(k)='Input',end
if units(k)==6 then nams(k)='Output',end
a=int(mod(k)/100)
b=int((mod(k)-100*a)/10)
c=int((mod(k)-100*a-10*b))
if typ(k)=='F' then //fortran file
typ(k)='F77'
select c
case 0 then
info(k)=info(k)+'new '
case 1 then
info(k)=info(k)+'old '
case 2 then
info(k)=info(k)+'scratch '
case 3 then
info(k)=info(k)+'unknown '
end
if a==0 then
info(k)=info(k)+'formatted '
else
info(k)=info(k)+'unformatted '
end
if b==0 then
//info(k)=info(k)+' '
else
info(k)=info(k)+'direct '
end
else //C file
select a
case 1 then
info(k)=info(k)+'r '
case 2 then
info(k)=info(k)+'w '
case 3 then
info(k)=info(k)+'a '
end
if b==1 then info(k)=info(k)+'+ ',end
if c==1 then info(k)=info(k)+'b ';end
if swap(k)<>0 then info(k)=info(k)+'swap=on';end
end
end
tab=['File name' 'Unit' 'Type' 'Options';
nams(:) string(units(:)) typ(:) info]
t=emptystr(n+1,1)+'|'
for k=1:size(tab,2)
t=t+part(tab(:,k),1:max(length(tab(:,k))))+'|'
end
t=[t(1);'|'+part('-',ones(1,max(length(t))-2))+'|';t(2:$)]
write(%io(2),t,'(a)')
endfunction
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