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subroutine intrat
c Copyright INRIA/ENPC
INCLUDE '../stack.h'
c
integer tops
double precision eps,xxx
integer iadr,sadr
character bu1*(bsiz),bu2*(bsiz)
c
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
if (ddt .eq. 4) then
write(buf(1:4),'(i4)') fin
call basout(io,wte,' matio '//buf(1:4))
endif
c
tops=top
c
if(rhs.gt.2) then
call error(42)
return
endif
if(lhs.gt.2) then
call error(41)
return
endif
if(rhs.eq.2) then
il=iadr(lstk(top))
if(istk(il).ne.1) then
err=2
call error(52)
return
endif
eps=stk(sadr(il+4))
top=top-1
else
eps=1.d-6
endif
lw=lstk(top+1)
il=iadr(lstk(top))
l=sadr(il+4)
il=iadr(lstk(top))
if(istk(il).ne.1) then
call funnam(ids(1,pt+1),'rat',iadr(lstk(top)))
top=tops
fun=-1
return
endif
l=sadr(il+4)
m=istk(il+1)
n=istk(il+2)
it=istk(il+3)
if(it.ne.0) then
call funnam(ids(1,pt+1),'rat',iadr(lstk(top)))
top=tops
fun=-1
return
endif
mn=m*n*(it+1)
l2 = l
c
if(lhs.eq.1) goto 48
if(top+2.ge.bot) then
call error(18)
return
endif
top=top+1
il=iadr(lstk(top))
l2=sadr(il+4)
err = l2+mn - lstk(bot)
if (err .gt. 0) then
call error(17)
return
endif
istk(il)=1
istk(il+1)=m
istk(il+2)=n
istk(il+3)=it
lstk(top+1)=l2+mn
c
xxx=0.0d0
do 47 i1=0,mn-1
xxx=max(xxx,abs(stk(l+i1)))
47 continue
if(xxx.gt.0.0d0) eps=eps*xxx
48 do 49 i=1,mn
i1=i-1
xxx=stk(l+i1)
call rat(abs(xxx),eps,ns,nt,err)
if(xxx.lt.0.0d+0) ns=-ns
if(err.gt.0) then
call error(24)
return
endif
stk(l+i1) = dble(ns)
stk(l2+i1) = dble(nt)
if (lhs .eq. 1) stk(l+i1) = dble(ns)/dble(nt)
49 continue
go to 999
999 return
end
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