csscalf.f

subroutinecsscalf(n,sa,cx,incx)
c
c scales a complex vector by a real constant.
c jack dongarra, linpack, 3/11/78.
c modified 3/93 to return if incx .le. 0.
c modified 12/3/93, array(1) declarations changed to array(*)
c
complex cx(*)
real sa
integer i,incx,n,nincx
c
if( n.le.0.or. incx.le.0 )return
if(incx.eq.1)go to20
c
c code for increment not equal to 1
c
 nincx = n*incx
do10 i =1,nincx,incx
 cx(i) =cmplx(sa*real(cx(i)),sa*aimag(cx(i)))
10continue
return
c
c code for increment equal to 1
c
20do30 i =1,n
 cx(i) =cmplx(sa*real(cx(i)),sa*aimag(cx(i)))
30continue
return
end