{-# LANGUAGE ForeignFunctionInterface, MagicHash, BangPatterns #-}

module PGF2.FFI where

#include <gu/defs.h>
#include <gu/hash.h>
#include <gu/utf8.h>
#include <pgf/pgf.h>

import Foreign ( alloca, peek, poke, peekByteOff )
import Foreign.C
import Foreign.Ptr
import Foreign.ForeignPtr
import Control.Exception
import GHC.Ptr
import Data.Int
import Data.Word
import qualified Data.Map as Map

type Touch = IO ()

-- | An abstract data type representing multilingual grammar
-- in Portable Grammar Format.
data PGF = PGF {pgf :: Ptr PgfPGF, langs :: Map.Map String Concr, touchPGF :: Touch}
data Concr = Concr {concr :: Ptr PgfConcr, touchConcr :: Touch}

------------------------------------------------------------------
-- libgu API

data GuEnum
data GuExn
data GuIn
data GuOut
data GuKind
data GuType
data GuStringBuf
data GuMap
data GuMapItor
data GuHasher
data GuSeq
data GuBuf
data GuPool
type GuVariant = Ptr ()
type GuHash = (#type GuHash)
type GuUCS = (#type GuUCS)

type CSizeT = (#type size_t)
type CUInt8 = (#type uint8_t)

foreign import ccall unsafe fopen :: CString -> CString -> IO (Ptr ())

foreign import ccall unsafe "gu/mem.h gu_new_pool"
  gu_new_pool :: IO (Ptr GuPool)

foreign import ccall unsafe "gu/mem.h gu_malloc"
  gu_malloc :: Ptr GuPool -> CSizeT -> IO (Ptr a)

foreign import ccall unsafe "gu/mem.h gu_malloc_aligned"
  gu_malloc_aligned :: Ptr GuPool -> CSizeT -> CSizeT -> IO (Ptr a)

foreign import ccall unsafe "gu/mem.h gu_pool_free"
  gu_pool_free :: Ptr GuPool -> IO ()

foreign import ccall unsafe "gu/mem.h &gu_pool_free"
  gu_pool_finalizer :: FinalizerPtr GuPool

foreign import ccall unsafe "gu/exn.h gu_new_exn"
  gu_new_exn :: Ptr GuPool -> IO (Ptr GuExn)

foreign import ccall unsafe "gu/exn.h gu_exn_is_raised"
  gu_exn_is_raised :: Ptr GuExn -> IO Bool

foreign import ccall unsafe "gu/exn.h gu_exn_caught_"
  gu_exn_caught :: Ptr GuExn -> CString -> IO Bool

foreign import ccall unsafe "gu/exn.h gu_exn_raise_"
  gu_exn_raise :: Ptr GuExn -> CString -> IO (Ptr ())

gu_exn_type_GuErrno = Ptr "GuErrno"## :: CString

gu_exn_type_GuEOF = Ptr "GuEOF"## :: CString

gu_exn_type_PgfLinNonExist = Ptr "PgfLinNonExist"## :: CString

gu_exn_type_PgfExn = Ptr "PgfExn"## :: CString

gu_exn_type_PgfParseError = Ptr "PgfParseError"## :: CString

gu_exn_type_PgfTypeError = Ptr "PgfTypeError"## :: CString

foreign import ccall unsafe "gu/string.h gu_string_in"
  gu_string_in :: CString -> Ptr GuPool -> IO (Ptr GuIn)

foreign import ccall unsafe "gu/string.h gu_new_string_buf"
  gu_new_string_buf :: Ptr GuPool -> IO (Ptr GuStringBuf)

foreign import ccall unsafe "gu/string.h gu_string_buf_out"
  gu_string_buf_out :: Ptr GuStringBuf -> IO (Ptr GuOut)

foreign import ccall unsafe "gu/file.h gu_file_in"
  gu_file_in :: Ptr () -> Ptr GuPool -> IO (Ptr GuIn)

foreign import ccall safe  "gu/enum.h gu_enum_next"
  gu_enum_next :: Ptr a -> Ptr (Ptr b) -> Ptr GuPool -> IO ()
 
foreign import ccall unsafe "gu/string.h gu_string_buf_freeze"
  gu_string_buf_freeze :: Ptr GuStringBuf -> Ptr GuPool -> IO CString

foreign import ccall unsafe "gu/utf8.h gu_utf8_decode"
  gu_utf8_decode :: Ptr CString -> IO GuUCS

foreign import ccall unsafe "gu/utf8.h gu_utf8_encode"
  gu_utf8_encode :: GuUCS -> Ptr CString -> IO ()

foreign import ccall unsafe "gu/seq.h gu_make_seq"
  gu_make_seq :: CSizeT -> CSizeT -> Ptr GuPool -> IO (Ptr GuSeq)

foreign import ccall unsafe "gu/seq.h gu_make_buf"
  gu_make_buf :: CSizeT -> Ptr GuPool -> IO (Ptr GuBuf)

foreign import ccall unsafe "gu/map.h gu_make_map"
  gu_make_map :: CSizeT -> Ptr GuHasher -> CSizeT -> Ptr a -> CSizeT -> Ptr GuPool -> IO (Ptr GuMap)

foreign import ccall unsafe "gu/map.h gu_map_insert"
  gu_map_insert :: Ptr GuMap -> Ptr a -> IO (Ptr b)

foreign import ccall unsafe "gu/map.h gu_map_find_default"
  gu_map_find_default :: Ptr GuMap -> Ptr a -> IO (Ptr b)

foreign import ccall "gu/map.h gu_map_iter"
  gu_map_iter :: Ptr GuMap -> Ptr GuMapItor -> Ptr GuExn -> IO ()

foreign import ccall unsafe "gu/hash.h &gu_int_hasher"
  gu_int_hasher :: Ptr GuHasher

foreign import ccall unsafe "gu/hash.h &gu_addr_hasher"
  gu_addr_hasher :: Ptr GuHasher

foreign import ccall unsafe "gu/hash.h &gu_string_hasher"
  gu_string_hasher :: Ptr GuHasher

foreign import ccall unsafe "gu/hash.h &gu_null_struct"
  gu_null_struct :: Ptr a

foreign import ccall unsafe "gu/variant.h gu_variant_tag"
  gu_variant_tag :: GuVariant -> IO CInt

foreign import ccall unsafe "gu/variant.h gu_variant_data"
  gu_variant_data :: GuVariant -> IO (Ptr a)

foreign import ccall unsafe "gu/variant.h gu_alloc_variant"
  gu_alloc_variant :: CUInt8 -> CSizeT -> CSizeT -> Ptr GuVariant -> Ptr GuPool -> IO (Ptr a)


withGuPool :: (Ptr GuPool -> IO a) -> IO a
withGuPool f = bracket gu_new_pool gu_pool_free f

newOut :: Ptr GuPool -> IO (Ptr GuStringBuf, Ptr GuOut)
newOut pool =
   do sb  <- gu_new_string_buf pool
      out <- gu_string_buf_out sb
      return (sb,out)

peekUtf8CString :: CString -> IO String
peekUtf8CString ptr =
  alloca $ \pptr ->
    poke pptr ptr >> decode pptr
  where
    decode pptr = do
      x <- gu_utf8_decode pptr
      if x == 0
        then return []
        else do cs <- decode pptr
                return (((toEnum . fromEnum) x) : cs)

peekUtf8CStringLen :: CString -> CInt -> IO String
peekUtf8CStringLen ptr len =
  alloca $ \pptr ->
    poke pptr ptr >> decode pptr (ptr `plusPtr` fromIntegral len)
  where
    decode pptr end = do
      ptr <- peek pptr
      if ptr >= end
        then return []
        else do x <- gu_utf8_decode pptr
                cs <- decode pptr end
                return (((toEnum . fromEnum) x) : cs)

pokeUtf8CString :: String -> CString -> IO ()
pokeUtf8CString s ptr =
  alloca $ \pptr ->
    poke pptr ptr >> encode s pptr
  where
    encode []     pptr = do
      gu_utf8_encode 0 pptr
    encode (c:cs) pptr = do
      gu_utf8_encode ((toEnum . fromEnum) c) pptr
      encode cs pptr

newUtf8CString :: String -> Ptr GuPool -> IO CString
newUtf8CString s pool = do
  ptr <- gu_malloc pool (fromIntegral (utf8Length s))
  pokeUtf8CString s ptr
  return ptr

utf8Length s = count 0 s
  where
    count !c []         = c+1
    count !c (x:xs)
      | ucs < 0x80      = count (c+1) xs
      | ucs < 0x800     = count (c+2) xs
      | ucs < 0x10000   = count (c+3) xs
      | ucs < 0x200000  = count (c+4) xs
      | ucs < 0x4000000 = count (c+5) xs
      | otherwise       = count (c+6) xs
      where
        ucs = fromEnum x

peekSequence peekElem size ptr = do
  c_len <- (#peek GuSeq, len) ptr
  peekElems (c_len :: CSizeT) (ptr `plusPtr` (#offset GuSeq, data))
  where
     peekElems 0   ptr = return []
     peekElems len ptr = do
       e  <- peekElem ptr
       es <- peekElems (len-1) (ptr `plusPtr` size)
       return (e:es)

newSequence :: CSizeT -> (Ptr a -> v -> IO ()) -> [v] -> Ptr GuPool -> IO (Ptr GuSeq)
newSequence elem_size pokeElem values pool = do
  c_seq <- gu_make_seq elem_size (fromIntegral (length values)) pool
  pokeElems (c_seq `plusPtr` (#offset GuSeq, data)) values
  return c_seq
  where
    pokeElems ptr []     = return ()
    pokeElems ptr (x:xs) = do
      pokeElem  ptr x
      pokeElems (ptr `plusPtr` (fromIntegral elem_size)) xs

------------------------------------------------------------------
-- libpgf API

data PgfPGF
data PgfApplication
data PgfConcr
type PgfExpr = Ptr ()
data PgfExprProb
data PgfExprParser
data PgfFullFormEntry
data PgfMorphoCallback
data PgfPrintContext
type PgfType = Ptr ()
data PgfCallbacksMap
data PgfOracleCallback
data PgfCncTree
data PgfLinFuncs
data PgfGraphvizOptions
type PgfBindType = (#type PgfBindType)
data PgfAbsFun
data PgfAbsCat
data PgfCCat
data PgfCncFun
data PgfProductionApply

foreign import ccall "pgf/pgf.h pgf_read"
  pgf_read :: CString -> Ptr GuPool -> Ptr GuExn -> IO (Ptr PgfPGF)

foreign import ccall "pgf/pgf.h pgf_write"
  pgf_write :: Ptr PgfPGF -> CSizeT -> Ptr (Ptr PgfConcr) -> CString -> Ptr GuExn -> IO ()

foreign import ccall "pgf/writer.h pgf_concrete_save"
  pgf_concrete_save :: Ptr PgfConcr -> CString -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_have_same_abstract"
  pgf_have_same_abstract :: Ptr PgfPGF -> Ptr PgfPGF -> (#type bool)

foreign import ccall "pgf/pgf.h pgf_abstract_name"
  pgf_abstract_name :: Ptr PgfPGF -> IO CString

foreign import ccall "pgf/pgf.h pgf_iter_languages"
  pgf_iter_languages :: Ptr PgfPGF -> Ptr GuMapItor -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_get_language"
  pgf_get_language :: Ptr PgfPGF -> CString -> IO (Ptr PgfConcr)

foreign import ccall "pgf/pgf.h pgf_concrete_name"
  pgf_concrete_name :: Ptr PgfConcr -> IO CString

foreign import ccall "pgf/pgf.h pgf_concrete_load"
  pgf_concrete_load :: Ptr PgfConcr -> Ptr GuIn -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_concrete_unload"
  pgf_concrete_unload :: Ptr PgfConcr -> IO ()

foreign import ccall "pgf/pgf.h pgf_language_code"
  pgf_language_code :: Ptr PgfConcr -> IO CString

foreign import ccall "pgf/pgf.h pgf_iter_categories"
  pgf_iter_categories :: Ptr PgfPGF -> Ptr GuMapItor -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_concrete_fix_internals"
  pgf_concrete_fix_internals :: Ptr PgfConcr -> IO ()

foreign import ccall "pgf/pgf.h pgf_start_cat"
  pgf_start_cat :: Ptr PgfPGF -> Ptr GuPool -> IO PgfType

foreign import ccall "pgf/pgf.h pgf_category_context"
  pgf_category_context :: Ptr PgfPGF -> CString -> IO (Ptr GuSeq)

foreign import ccall "pgf/pgf.h pgf_category_prob"
  pgf_category_prob :: Ptr PgfPGF -> CString -> IO (#type prob_t)

foreign import ccall "pgf/pgf.h pgf_iter_functions"
  pgf_iter_functions :: Ptr PgfPGF -> Ptr GuMapItor -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_iter_functions_by_cat"
  pgf_iter_functions_by_cat :: Ptr PgfPGF -> CString -> Ptr GuMapItor -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_function_type"
   pgf_function_type :: Ptr PgfPGF -> CString -> IO PgfType

foreign import ccall "pgf/expr.h pgf_function_is_constructor"
   pgf_function_is_constructor :: Ptr PgfPGF -> CString -> IO (#type bool)

foreign import ccall "pgf/pgf.h pgf_print_name"
  pgf_print_name :: Ptr PgfConcr -> CString -> IO CString

foreign import ccall "pgf/pgf.h pgf_has_linearization"
  pgf_has_linearization :: Ptr PgfConcr -> CString -> IO CInt

foreign import ccall "pgf/pgf.h pgf_linearize"
  pgf_linearize :: Ptr PgfConcr -> PgfExpr -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_lzr_concretize"
  pgf_lzr_concretize :: Ptr PgfConcr -> PgfExpr -> Ptr GuExn -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_lzr_wrap_linref"
  pgf_lzr_wrap_linref :: Ptr PgfCncTree -> Ptr GuPool -> IO (Ptr PgfCncTree)

foreign import ccall "pgf/pgf.h pgf_lzr_linearize_simple"
  pgf_lzr_linearize_simple :: Ptr PgfConcr -> Ptr PgfCncTree -> CSizeT -> Ptr GuOut -> Ptr GuExn -> Ptr GuPool -> IO ()

foreign import ccall "pgf/pgf.h pgf_lzr_linearize"
  pgf_lzr_linearize :: Ptr PgfConcr -> Ptr PgfCncTree -> CSizeT -> Ptr (Ptr PgfLinFuncs) -> Ptr GuPool -> IO ()

foreign import ccall "pgf/pgf.h pgf_lzr_get_table"
  pgf_lzr_get_table :: Ptr PgfConcr -> Ptr PgfCncTree -> Ptr CSizeT -> Ptr (Ptr CString) -> IO ()

type SymbolTokenCallback = Ptr (Ptr PgfLinFuncs) -> CString -> IO ()
type PhraseCallback = Ptr (Ptr PgfLinFuncs) -> CString -> CInt -> CSizeT -> CString -> IO ()
type NonExistCallback = Ptr (Ptr PgfLinFuncs) -> IO ()
type MetaCallback = Ptr (Ptr PgfLinFuncs) -> CInt -> IO ()

foreign import ccall "wrapper"
  wrapSymbolTokenCallback :: SymbolTokenCallback -> IO (FunPtr SymbolTokenCallback)

foreign import ccall "wrapper"
  wrapPhraseCallback :: PhraseCallback -> IO (FunPtr PhraseCallback)

foreign import ccall "wrapper"
  wrapSymbolNonExistCallback :: NonExistCallback -> IO (FunPtr NonExistCallback)

foreign import ccall "wrapper"
  wrapSymbolMetaCallback :: MetaCallback -> IO (FunPtr MetaCallback)

foreign import ccall "pgf/pgf.h pgf_align_words"
  pgf_align_words :: Ptr PgfConcr -> PgfExpr -> Ptr GuExn -> Ptr GuPool -> IO (Ptr GuSeq)

foreign import ccall "pgf/pgf.h pgf_parse_with_heuristics"
  pgf_parse_with_heuristics :: Ptr PgfConcr -> PgfType -> CString -> Double -> Ptr PgfCallbacksMap -> Ptr GuExn -> Ptr GuPool -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_complete"
  pgf_complete :: Ptr PgfConcr -> PgfType -> CString -> CString -> Ptr GuExn -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_lookup_sentence"
  pgf_lookup_sentence :: Ptr PgfConcr -> PgfType -> CString -> Ptr GuPool -> Ptr GuPool -> IO (Ptr GuEnum)

type LiteralMatchCallback = CSizeT -> Ptr CSizeT -> Ptr GuPool -> IO (Ptr PgfExprProb)

foreign import ccall "wrapper"
  wrapLiteralMatchCallback :: LiteralMatchCallback -> IO (FunPtr LiteralMatchCallback)

type LiteralPredictCallback = CSizeT -> CString -> Ptr GuPool -> IO (Ptr PgfExprProb)

foreign import ccall "wrapper"
  wrapLiteralPredictCallback :: LiteralPredictCallback -> IO (FunPtr LiteralPredictCallback)

foreign import ccall "pgf/pgf.h pgf_new_callbacks_map"
  pgf_new_callbacks_map :: Ptr PgfConcr -> Ptr GuPool -> IO (Ptr PgfCallbacksMap)

foreign import ccall
  hspgf_callbacks_map_add_literal :: Ptr PgfConcr -> Ptr PgfCallbacksMap -> CString -> FunPtr LiteralMatchCallback -> FunPtr LiteralPredictCallback -> Ptr GuPool -> IO ()

type OracleCallback = CString -> CString -> CSizeT -> IO Bool
type OracleLiteralCallback = CString -> CString -> Ptr CSizeT -> Ptr GuPool -> IO (Ptr PgfExprProb)

foreign import ccall "wrapper"
  wrapOracleCallback :: OracleCallback -> IO (FunPtr OracleCallback)

foreign import ccall "wrapper"
  wrapOracleLiteralCallback :: OracleLiteralCallback -> IO (FunPtr OracleLiteralCallback)

foreign import ccall
  hspgf_new_oracle_callback :: CString -> FunPtr OracleCallback -> FunPtr OracleCallback -> FunPtr OracleLiteralCallback -> Ptr GuPool -> IO (Ptr PgfOracleCallback)

foreign import ccall "pgf/pgf.h pgf_parse_with_oracle"
  pgf_parse_with_oracle :: Ptr PgfConcr -> CString -> CString -> Ptr PgfOracleCallback -> Ptr GuExn -> Ptr GuPool -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_lookup_morpho"
  pgf_lookup_morpho :: Ptr PgfConcr -> CString -> Ptr PgfMorphoCallback -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_lookup_cohorts"
  pgf_lookup_cohorts :: Ptr PgfConcr -> CString -> Ptr PgfMorphoCallback -> Ptr GuPool -> Ptr GuExn -> IO (Ptr GuEnum)

type LookupMorphoCallback = Ptr PgfMorphoCallback -> CString -> CString -> Float -> Ptr GuExn -> IO ()

foreign import ccall "wrapper"
  wrapLookupMorphoCallback :: LookupMorphoCallback -> IO (FunPtr LookupMorphoCallback)

type MapItorCallback = Ptr GuMapItor -> Ptr () -> Ptr () -> Ptr GuExn -> IO ()

foreign import ccall "wrapper"
  wrapMapItorCallback :: MapItorCallback -> IO (FunPtr MapItorCallback)

foreign import ccall "pgf/pgf.h pgf_fullform_lexicon"
  pgf_fullform_lexicon :: Ptr PgfConcr -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_fullform_get_string"
  pgf_fullform_get_string :: Ptr PgfFullFormEntry -> IO CString

foreign import ccall "pgf/pgf.h pgf_fullform_get_analyses"
  pgf_fullform_get_analyses :: Ptr PgfFullFormEntry -> Ptr PgfMorphoCallback -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_expr_apply"
  pgf_expr_apply :: Ptr PgfApplication -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_unapply"
  pgf_expr_unapply :: PgfExpr -> Ptr GuPool -> IO (Ptr PgfApplication)
  
foreign import ccall "pgf/pgf.h pgf_expr_unapply_ex"
  pgf_expr_unapply_ex :: PgfExpr -> Ptr GuPool -> IO (Ptr PgfApplication)

foreign import ccall "pgf/pgf.h pgf_expr_abs"
  pgf_expr_abs :: PgfBindType -> CString -> PgfExpr -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_unabs"
  pgf_expr_unabs :: PgfExpr -> IO (Ptr a)

foreign import ccall "pgf/pgf.h pgf_expr_meta"
  pgf_expr_meta :: CInt -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_unmeta"
  pgf_expr_unmeta :: PgfExpr -> IO (Ptr a)

foreign import ccall "pgf/pgf.h pgf_expr_string"
  pgf_expr_string :: CString -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_int"
  pgf_expr_int :: CInt -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_float"
  pgf_expr_float :: CDouble -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/pgf.h pgf_expr_unlit"
  pgf_expr_unlit :: PgfExpr -> CInt -> IO (Ptr a)

foreign import ccall "pgf/expr.h pgf_expr_eq"
  pgf_expr_eq :: PgfExpr -> PgfExpr -> IO CInt

foreign import ccall "pgf/expr.h pgf_type_eq"
  pgf_type_eq :: PgfType -> PgfType -> IO (#type bool)

foreign import ccall "pgf/expr.h pgf_expr_hash"
  pgf_expr_hash :: GuHash -> PgfExpr -> IO GuHash

foreign import ccall "pgf/expr.h pgf_expr_size"
  pgf_expr_size :: PgfExpr -> IO CInt

foreign import ccall "pgf/expr.h pgf_expr_functions"
  pgf_expr_functions :: PgfExpr -> Ptr GuPool -> IO (Ptr GuSeq)

foreign import ccall "pgf/expr.h pgf_expr_substitute"
  pgf_expr_substitute :: PgfExpr -> Ptr GuSeq -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/expr.h pgf_compute_tree_probability"
  pgf_compute_tree_probability :: Ptr PgfPGF -> PgfExpr -> IO CFloat

foreign import ccall "pgf/expr.h pgf_check_expr"
  pgf_check_expr :: Ptr PgfPGF -> Ptr PgfExpr -> PgfType -> Ptr GuExn -> Ptr GuPool -> IO ()

foreign import ccall "pgf/expr.h pgf_infer_expr"
  pgf_infer_expr :: Ptr PgfPGF -> Ptr PgfExpr -> Ptr GuExn -> Ptr GuPool -> IO PgfType

foreign import ccall "pgf/expr.h pgf_check_type"
  pgf_check_type :: Ptr PgfPGF -> Ptr PgfType -> Ptr GuExn -> Ptr GuPool -> IO ()

foreign import ccall "pgf/expr.h pgf_compute"
  pgf_compute :: Ptr PgfPGF -> PgfExpr -> Ptr GuExn -> Ptr GuPool -> Ptr GuPool -> IO PgfExpr

foreign import ccall "pgf/expr.h pgf_print_expr"
  pgf_print_expr :: PgfExpr -> Ptr PgfPrintContext -> CInt -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/expr.h pgf_print_expr_tuple"
  pgf_print_expr_tuple :: CSizeT -> Ptr PgfExpr -> Ptr PgfPrintContext -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/expr.h pgf_print_type"
  pgf_print_type :: PgfType -> Ptr PgfPrintContext -> CInt -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/expr.h pgf_print_context"
  pgf_print_context :: Ptr GuSeq -> Ptr PgfPrintContext -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/pgf.h pgf_generate_all"
  pgf_generate_all :: Ptr PgfPGF -> PgfType -> Ptr GuExn -> Ptr GuPool -> Ptr GuPool -> IO (Ptr GuEnum)

foreign import ccall "pgf/pgf.h pgf_print"
  pgf_print :: Ptr PgfPGF -> CSizeT -> Ptr (Ptr PgfConcr) -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/expr.h pgf_read_expr"
  pgf_read_expr :: Ptr GuIn -> Ptr GuPool -> Ptr GuPool -> Ptr GuExn -> IO PgfExpr

foreign import ccall "pgf/expr.h pgf_read_expr_tuple"
  pgf_read_expr_tuple :: Ptr GuIn -> CSizeT -> Ptr PgfExpr -> Ptr GuPool -> Ptr GuExn -> IO CInt

foreign import ccall "pgf/expr.h pgf_read_expr_matrix"
  pgf_read_expr_matrix :: Ptr GuIn -> CSizeT -> Ptr GuPool -> Ptr GuExn -> IO (Ptr GuSeq)

foreign import ccall "pgf/expr.h pgf_read_type"
  pgf_read_type :: Ptr GuIn -> Ptr GuPool -> Ptr GuPool -> Ptr GuExn -> IO PgfType

foreign import ccall "pgf/graphviz.h pgf_graphviz_abstract_tree"
  pgf_graphviz_abstract_tree :: Ptr PgfPGF -> PgfExpr -> Ptr PgfGraphvizOptions -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/graphviz.h pgf_graphviz_parse_tree"
  pgf_graphviz_parse_tree :: Ptr PgfConcr -> PgfExpr -> Ptr PgfGraphvizOptions -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/graphviz.h pgf_graphviz_word_alignment"
  pgf_graphviz_word_alignment :: Ptr (Ptr PgfConcr) -> CSizeT -> PgfExpr -> Ptr PgfGraphvizOptions -> Ptr GuOut -> Ptr GuExn -> IO ()

foreign import ccall "pgf/data.h pgf_parser_index"
  pgf_parser_index :: Ptr PgfConcr -> Ptr PgfCCat -> GuVariant -> (#type bool) -> Ptr GuPool -> IO ()

foreign import ccall "pgf/data.h pgf_lzr_index"
  pgf_lzr_index :: Ptr PgfConcr -> Ptr PgfCCat -> GuVariant -> (#type bool) -> Ptr GuPool -> IO ()

foreign import ccall "pgf/data.h pgf_production_is_lexical"
  pgf_production_is_lexical :: Ptr PgfProductionApply -> Ptr GuBuf -> Ptr GuPool -> IO (#type bool)