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add interfaces for sine transform #43

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add interfaces for sine transform #43

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18 changes: 18 additions & 0 deletions src/fftpack.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@ module fftpack
public :: dct_t1i, dct_t1
public :: dct_t23i, dct_t2, dct_t3

public :: dsinti, dsint

public :: rk

interface
Expand Down Expand Up @@ -177,6 +179,22 @@ pure subroutine dcost(n, x, wsave)
real(kind=rk), intent(in) :: wsave(*)
end subroutine dcost


pure subroutine dsinti(n, wsave)
import rk
integer, intent(in) :: n
real(kind=rk), intent(out) :: wsave(*)
end subroutine dsinti


pure subroutine dsint(n, x, wsave)
import rk
integer, intent(in) :: n
real(kind=rk), intent(inout) :: x(*)
real(kind=rk), intent(in) :: wsave(*)
end subroutine dsint


!> Version: experimental
!>
!> Integer frequency values involved in complex FFT.
Expand Down