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subroutine wwrdiv(ar,ai,ia,br,bi,ib,rr,ri,ir,n,ierr)
c! purpose
c computes r=a./b with a and b complex vectors
c
c ia,ib,ir : increment between two consecutive element of vectors a
c b and r
c ar,ai : arrays containing a real and imaginary parts
c br,bi : arrays containing b real and imaginary parts
c rr,ri : arrays containing r real and imaginary parts
c n : vectors length
c ierr : returned error flag:
c o : ok
c <>0 : b(ierr)=0
c!
c Copyright INRIA
double precision ar(*),ai(*),br(*),bi(*),rr(*),ri(*)
integer ia,ib,ir,n
jr=1
jb=1
ja=1
ierr=0
if (ia.eq.0) then
do 10 k=1,n
call wwdiv(ar(ja),ai(ja),br(jb),bi(jb),rr(jr),ri(jr),ierr)
if(ierr.ne.0) then
ierr=k
c return
endif
jr=jr+ir
jb=jb+ib
10 continue
elseif(ib.eq.0) then
if(abs(br(jb))+abs(bi(jb)).eq.0.0d0) then
ierr=1
c return
endif
do 11 k=1,n
call wwdiv(ar(ja),ai(ja),br(jb),bi(jb),rr(jr),ri(jr),ierr)
jr=jr+ir
ja=ja+ia
11 continue
else
do 12 k=1,n
call wwdiv(ar(ja),ai(ja),br(jb),bi(jb),rr(jr),ri(jr),ierr)
if(ierr.ne.0) then
ierr=k
c return
endif
jr=jr+ir
jb=jb+ib
ja=ja+ia
12 continue
endif
end
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