;; Fluence SQLite fork Wasm Interface Types

;; allocate
(@interface type (func (param $size: i32) (result i32)))                ;; 0

;; deallocate
(@interface type (func (param $pointer: i32 $size: i32)))               ;; 1

;; invoke
(@interface type (func (param $request: string) (result string)))       ;; 2

;; get_result_ptr/get_result_size
(@interface type (func (result i32)))                                   ;; 3

;; set_result_ptr/set_result_size
(@interface type (func (param $result: i32)))                           ;; 4

(@interface export "allocate" (func  0))               ;; 0
(@interface export "deallocate" (func 1))              ;; 1
(@interface export "invoke" (func 2))                  ;; 2
(@interface export "get_result_size" (func 3))         ;; 3
(@interface export "get_result_ptr" (func 3))          ;; 4
(@interface export "set_result_size" (func 4))         ;; 5
(@interface export "set_result_ptr" (func 4))          ;; 6

;; adapter for export invoke function
(@interface func (type 2)
    arg.get 0
    string.size
    call-core 0             ;; call allocate
    arg.get 0
    string.lower_memory
    call-core 2             ;; call invoke
    call-core 4             ;; call get_result_size
    call-core 3             ;; call get_result_ptr
    string.lift_memory
    call-core 4             ;; call get_result_size
    call-core 3             ;; call get_result_ptr
    call-core 1             ;; call deallocate
)

;; Implementations
(@interface implement (func 2) (func 2))