{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE ExplicitForAll #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}

-- |
-- Module      : Data.Massiv.Array.Unsafe
-- Copyright   : (c) Alexey Kuleshevich 2018-2022
-- License     : BSD3
-- Maintainer  : Alexey Kuleshevich <lehins@yandex.ru>
-- Stability   : experimental
-- Portability : non-portable
module Data.Massiv.Array.Unsafe (
  -- * Creation
  unsafeMakeLoadArray,
  unsafeMakeLoadArrayAdjusted,

  -- * Indexing
  Sz (SafeSz),
  Stride (SafeStride),
  unsafeIndex,
  unsafePrefIndex,
  unsafeLinearIndex,
  unsafeLinearIndexM,

  -- * Manipulations
  unsafeBackpermute,
  unsafeResize,
  unsafeExtract,
  unsafeTransform,
  unsafeTransform2,

  -- * Slicing
  unsafeSlice,
  unsafeOuterSlice,
  unsafeInnerSlice,
  unsafeLinearSlice,

  -- * Mutable interface
  unsafeResizeMArray,
  unsafeLinearSliceMArray,
  unsafeThaw,
  unsafeFreeze,
  unsafeNew,
  unsafeLoadIntoST,
  unsafeLoadIntoIO,
  unsafeLoadIntoS,
  unsafeLoadIntoM,
  unsafeCreateArray,
  unsafeCreateArray_,
  unsafeCreateArrayS,

  -- ** Read
  unsafeRead,
  unsafeLinearRead,

  -- ** Write
  unsafeWrite,
  unsafeLinearWrite,

  -- ** Modify
  unsafeModify,
  unsafeLinearModify,

  -- ** Swap
  unsafeSwap,
  unsafeLinearSwap,

  -- ** Range modification
  unsafeLinearSet,
  unsafeLinearCopy,
  unsafeArrayLinearCopy,

  -- ** Resizing
  unsafeLinearShrink,
  unsafeLinearGrow,

  -- * Pointer access
  unsafeMallocMArray,
  unsafeWithPtr,
  unsafeArrayToForeignPtr,
  unsafeMArrayToForeignPtr,
  unsafeArrayFromForeignPtr,
  unsafeArrayFromForeignPtr0,
  unsafeMArrayFromForeignPtr,
  unsafeMArrayFromForeignPtr0,

  -- ** Atomic Operations
  unsafeAtomicReadIntArray,
  unsafeAtomicWriteIntArray,
  unsafeAtomicModifyIntArray,
  unsafeAtomicAddIntArray,
  unsafeAtomicSubIntArray,
  unsafeAtomicAndIntArray,
  unsafeAtomicNandIntArray,
  unsafeAtomicOrIntArray,
  unsafeAtomicXorIntArray,
  unsafeCasIntArray,

  -- ** Other operations
  coerceBoxedArray,
  coerceNormalBoxedArray,
  unsafeUnstablePartitionRegionM,
  module Data.Massiv.Vector.Unsafe,
  module Data.Massiv.Array.Stencil.Unsafe,

  -- * Constructors
  Array (PArray, SArray, UArray, BArray, BLArray, BNArray, DArray, DLArray, DSArray, DIArray, DWArray),
  MArray (MPArray, MSArray, MUArray, MBArray, MBLArray, MBNArray),
) where

import Data.Massiv.Array.Delayed.Interleaved (Array (DIArray))
import Data.Massiv.Array.Delayed.Pull (
  D,
  unsafeExtract,
  unsafeInnerSlice,
  unsafeSlice,
 )
import Data.Massiv.Array.Delayed.Push (
  Array (DLArray),
  unsafeMakeLoadArray,
  unsafeMakeLoadArrayAdjusted,
 )
import Data.Massiv.Array.Delayed.Stream (Array (DSArray))
import Data.Massiv.Array.Delayed.Windowed (Array (DWArray))
import Data.Massiv.Array.Manifest.Boxed
import Data.Massiv.Array.Manifest.Internal
import Data.Massiv.Array.Manifest.Primitive
import Data.Massiv.Array.Manifest.Storable
import Data.Massiv.Array.Manifest.Unboxed
import Data.Massiv.Array.Mutable.Internal
import Data.Massiv.Array.Ops.Sort (unsafeUnstablePartitionRegionM)
import Data.Massiv.Array.Stencil.Unsafe
import Data.Massiv.Core.Common
import Data.Massiv.Core.Index.Stride (Stride (SafeStride))
import Data.Massiv.Vector.Unsafe

unsafeBackpermute
  :: (Index ix', Source r' e, Index ix)
  => Sz ix
  -> (ix -> ix')
  -> Array r' ix' e
  -> Array D ix e
unsafeBackpermute !sz ixF !arr = makeArray (getComp arr) sz (unsafeIndex arr . ixF)
{-# INLINE unsafeBackpermute #-}

-- | Same 'Data.Array.transform'', except no bounds checking is performed, thus making it faster,
-- but unsafe.
--
-- @since 0.3.0
unsafeTransform
  :: (Index ix', Source r' e', Index ix)
  => (Sz ix' -> (Sz ix, a))
  -> (a -> (ix' -> e') -> ix -> e)
  -> Array r' ix' e'
  -> Array D ix e
unsafeTransform getSz get arr = makeArray (getComp arr) sz (get a (unsafeIndex arr))
  where
    (sz, a) = getSz (size arr)
{-# INLINE unsafeTransform #-}

-- | Same 'Data.Array.transform2'', except no bounds checking is performed, thus making it faster,
-- but unsafe.
--
-- @since 0.3.0
unsafeTransform2
  :: (Index ix1, Source r1 e1, Index ix2, Source r2 e2, Index ix)
  => (Sz ix1 -> Sz ix2 -> (Sz ix, a))
  -> (a -> (ix1 -> e1) -> (ix2 -> e2) -> ix -> e)
  -> Array r1 ix1 e1
  -> Array r2 ix2 e2
  -> Array D ix e
unsafeTransform2 getSz get arr1 arr2 =
  makeArray (getComp arr1 <> getComp arr2) sz (get a (unsafeIndex arr1) (unsafeIndex arr2))
  where
    (sz, a) = getSz (size arr1) (size arr2)
{-# INLINE unsafeTransform2 #-}