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! FORTRAN HASKELL BRIDGE — Theorem 3 Integration
! Sprint 2 Phase 2.2
! ═════════════════════════════════════════════════════════════════════════
module fortran_haskell_bridge
use, intrinsic :: iso_c_binding
use bob_kinds
implicit none
private
! ═════════════════════════════════════════════════════════════════════
! Haskell entry points via QuantumFortranBridge.hs
! ═════════════════════════════════════════════════════════════════════
interface
function haskell_theorem3_offload(poly_str, energy_budget) &
bind(C, name="haskell_theorem3_offload")
use iso_c_binding
character(kind=c_char) :: poly_str(*)
integer(c_int), value :: energy_budget
integer(c_int) :: haskell_theorem3_offload
end function haskell_theorem3_offload
function haskell_verify_genus_zero(polynomial_coeffs, num_coeffs) &
bind(C, name="haskell_verify_genus_zero")
use iso_c_binding
real(c_double) :: polynomial_coeffs(*)
integer(c_int), value :: num_coeffs
integer(c_int) :: haskell_verify_genus_zero
end function haskell_verify_genus_zero
end interface
public :: fortran_call_theorem3_kernel
public :: fortran_verify_polynomial_genus
public :: fortran_theorem3_energy_accounting
contains
! ─────────────────────────────────────────────────────────────────────
! Call Theorem 3 kernel with polynomial string
! ─────────────────────────────────────────────────────────────────────
subroutine fortran_call_theorem3_kernel(poly_str, energy_budget, status)
character(len=*), intent(in) :: poly_str
integer, intent(in) :: energy_budget
integer, intent(out) :: status
status = haskell_theorem3_offload(trim(poly_str) // c_null_char, int(energy_budget, c_int))
end subroutine fortran_call_theorem3_kernel
! ─────────────────────────────────────────────────────────────────────
! Verify polynomial genus with coefficient array
! ─────────────────────────────────────────────────────────────────────
subroutine fortran_verify_polynomial_genus(coeffs, num_coeffs, genus_status)
real(c_double), intent(in) :: coeffs(:)
integer, intent(in) :: num_coeffs
integer, intent(out) :: genus_status
genus_status = haskell_verify_genus_zero(coeffs, int(num_coeffs, c_int))
end subroutine fortran_verify_polynomial_genus
! ─────────────────────────────────────────────────────────────────────
! Energy accounting wrapper
! ─────────────────────────────────────────────────────────────────────
subroutine fortran_theorem3_energy_accounting(energy_spent, energy_budget, energy_remaining)
integer, intent(in) :: energy_spent, energy_budget
integer, intent(out) :: energy_remaining
energy_remaining = energy_budget - energy_spent
end subroutine fortran_theorem3_energy_accounting
end module fortran_haskell_bridge
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