| Copyright | (c) Roman Leshchinskiy 2009-2012 |
|---|---|
| License | BSD-style |
| Maintainer | Roman Leshchinskiy <rl@cse.unsw.edu.au> |
| Portability | non-portable |
| Safe Haskell | None |
| Language | Haskell2010 |
Data.Primitive.ByteArray
Description
Primitive operations on ByteArrays
- data ByteArray = ByteArray ByteArray#
- data MutableByteArray s = MutableByteArray (MutableByteArray# s)
- data ByteArray# :: (#)
- data MutableByteArray# a :: * -> (#)
- newByteArray :: PrimMonad m => Int -> m (MutableByteArray (PrimState m))
- newPinnedByteArray :: PrimMonad m => Int -> m (MutableByteArray (PrimState m))
- newAlignedPinnedByteArray :: PrimMonad m => Int -> Int -> m (MutableByteArray (PrimState m))
- readByteArray :: (Prim a, PrimMonad m) => MutableByteArray (PrimState m) -> Int -> m a
- writeByteArray :: (Prim a, PrimMonad m) => MutableByteArray (PrimState m) -> Int -> a -> m ()
- indexByteArray :: Prim a => ByteArray -> Int -> a
- unsafeFreezeByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> m ByteArray
- unsafeThawByteArray :: PrimMonad m => ByteArray -> m (MutableByteArray (PrimState m))
- copyByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> Int -> ByteArray -> Int -> Int -> m ()
- copyMutableByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> Int -> MutableByteArray (PrimState m) -> Int -> Int -> m ()
- moveByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> Int -> MutableByteArray (PrimState m) -> Int -> Int -> m ()
- setByteArray :: (Prim a, PrimMonad m) => MutableByteArray (PrimState m) -> Int -> Int -> a -> m ()
- fillByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> Int -> Int -> Word8 -> m ()
- sizeofByteArray :: ByteArray -> Int
- sizeofMutableByteArray :: MutableByteArray s -> Int
- sameMutableByteArray :: MutableByteArray s -> MutableByteArray s -> Bool
- byteArrayContents :: ByteArray -> Addr
- mutableByteArrayContents :: MutableByteArray s -> Addr
Types
data MutableByteArray s Source
Mutable byte arrays associated with a primitive state token
Constructors
| MutableByteArray (MutableByteArray# s) |
Instances
| Typeable * s => Data (MutableByteArray s) Source |
data ByteArray# :: (#)
data MutableByteArray# a :: * -> (#)
Allocation
newByteArray :: PrimMonad m => Int -> m (MutableByteArray (PrimState m)) Source
Create a new mutable byte array of the specified size.
newPinnedByteArray :: PrimMonad m => Int -> m (MutableByteArray (PrimState m)) Source
Create a pinned byte array of the specified size. The garbage collector is guaranteed not to move it.
newAlignedPinnedByteArray :: PrimMonad m => Int -> Int -> m (MutableByteArray (PrimState m)) Source
Create a pinned byte array of the specified size and with the give alignment. The garbage collector is guaranteed not to move it.
Element access
readByteArray :: (Prim a, PrimMonad m) => MutableByteArray (PrimState m) -> Int -> m a Source
Read a primitive value from the byte array. The offset is given in
elements of type a rather than in bytes.
writeByteArray :: (Prim a, PrimMonad m) => MutableByteArray (PrimState m) -> Int -> a -> m () Source
Write a primitive value to the byte array. The offset is given in
elements of type a rather than in bytes.
indexByteArray :: Prim a => ByteArray -> Int -> a Source
Read a primitive value from the byte array. The offset is given in
elements of type a rather than in bytes.
Freezing and thawing
unsafeFreezeByteArray :: PrimMonad m => MutableByteArray (PrimState m) -> m ByteArray Source
Convert a mutable byte array to an immutable one without copying. The array should not be modified after the conversion.
unsafeThawByteArray :: PrimMonad m => ByteArray -> m (MutableByteArray (PrimState m)) Source
Convert an immutable byte array to a mutable one without copying. The original array should not be used after the conversion.
Block operations
Arguments
| :: PrimMonad m | |
| => MutableByteArray (PrimState m) | destination array |
| -> Int | offset into destination array |
| -> ByteArray | source array |
| -> Int | offset into source array |
| -> Int | number of bytes to copy |
| -> m () |
Copy a slice of an immutable byte array to a mutable byte array.
Arguments
| :: PrimMonad m | |
| => MutableByteArray (PrimState m) | destination array |
| -> Int | offset into destination array |
| -> MutableByteArray (PrimState m) | source array |
| -> Int | offset into source array |
| -> Int | number of bytes to copy |
| -> m () |
Copy a slice of a mutable byte array into another array. The two slices may not overlap.
Arguments
| :: PrimMonad m | |
| => MutableByteArray (PrimState m) | destination array |
| -> Int | offset into destination array |
| -> MutableByteArray (PrimState m) | source array |
| -> Int | offset into source array |
| -> Int | number of bytes to copy |
| -> m () |
Copy a slice of a mutable byte array into another, potentially overlapping array.
Arguments
| :: (Prim a, PrimMonad m) | |
| => MutableByteArray (PrimState m) | array to fill |
| -> Int | offset into array |
| -> Int | number of values to fill |
| -> a | value to fill with |
| -> m () |
Fill a slice of a mutable byte array with a value. The offset and length
are given in elements of type a rather than in bytes.
Arguments
| :: PrimMonad m | |
| => MutableByteArray (PrimState m) | array to fill |
| -> Int | offset into array |
| -> Int | number of bytes to fill |
| -> Word8 | byte to fill with |
| -> m () |
Fill a slice of a mutable byte array with a byte.
Information
sizeofByteArray :: ByteArray -> Int Source
Size of the byte array.
sizeofMutableByteArray :: MutableByteArray s -> Int Source
Size of the mutable byte array.
sameMutableByteArray :: MutableByteArray s -> MutableByteArray s -> Bool Source
Check if the two arrays refer to the same memory block.
byteArrayContents :: ByteArray -> Addr Source
Yield a pointer to the array's data. This operation is only safe on
pinned byte arrays allocated by newPinnedByteArray or
newAlignedPinnedByteArray.
mutableByteArrayContents :: MutableByteArray s -> Addr Source
Yield a pointer to the array's data. This operation is only safe on
pinned byte arrays allocated by newPinnedByteArray or
newAlignedPinnedByteArray.