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c Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
c Copyright (C) INRIA - F Delebecque
c
c This file must be used under the terms of the CeCILL.
c This source file is licensed as described in the file COPYING, which
c you should have received as part of this distribution. The terms
c are also available at
c http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
subroutine expan(a,la,b,lb,c,nmax)
c! but
c calcul des nmax premiers coefficients de la longue division de
c b par a .On suppose a(1) non nul.
c!liste d'appel
c subroutine expan(a,la,b,lb,c,nmax)
c a vecteur de longueur la des coeffs par puissances croissantes
c b " " lb " " "
c c nmax des coeffs de a/b
c
dimension a(la),b(lb),c(nmax)
double precision a,b,c,s,a0
c
m=la
n=lb
a0=a(1)
if(a0.eq.0.0d+0) return
k=1
2 continue
s=0.0d+0
if(k.eq.1) goto 8
j=1
5 continue
j=j+1
if(j.gt.min(m,k)) goto 8
s=s+a(j)*c(k-j+1)
goto 05
8 continue
if(k.le.n) then
c(k)=(b(k)-s)/a0
else
c(k)=-s/a0
endif
if(k.eq.nmax) return
k=k+1
goto 2
end
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