Data.Binary.Put

ghc-binary-0.5.0.2: Binary serialisation for Haskell values using lazy ByteStrings

Portability | Portable to Hugs and GHC. Requires MPTCs
Stability | stable
Maintainer | Lennart Kolmodin <kolmodin@dtek.chalmers.se>

Data.Binary.Put

Contents

- The Put type
- Flushing the implicit parse state
- Primitives
- Big-endian primitives
- Little-endian primitives
- Host-endian, unaligned writes

Description

The Put monad. A monad for efficiently constructing lazy bytestrings.

Synopsis

- type Put = PutM ()
- newtype PutM a = Put {
  - unPut :: PairS a
  }
- runPut :: Put -> ByteString
- runPutM :: PutM a -> (a, ByteString)
- putBuilder :: Builder -> Put
- execPut :: PutM a -> Builder
- flush :: Put
- putWord8 :: Word8 -> Put
- putByteString :: ByteString -> Put
- putLazyByteString :: ByteString -> Put
- putWord16be :: Word16 -> Put
- putWord32be :: Word32 -> Put
- putWord64be :: Word64 -> Put
- putWord16le :: Word16 -> Put
- putWord32le :: Word32 -> Put
- putWord64le :: Word64 -> Put
- putWordhost :: Word -> Put
- putWord16host :: Word16 -> Put
- putWord32host :: Word32 -> Put
- putWord64host :: Word64 -> Put

# The Put type

type Put = PutM ()

Put merely lifts Builder into a Writer monad, applied to ().

newtype PutM a

The PutM type. A Writer monad over the efficient Builder monoid.

Constructors

Put |
Fields unPut :: PairS a

Instances

Monad PutM |
Functor PutM |
Applicative PutM |

runPut :: Put -> ByteString

Run the `Put` monad with a serialiser

runPutM :: PutM a -> (a, ByteString)

Run the `Put` monad with a serialiser and get its result

putBuilder :: Builder -> Put

execPut :: PutM a -> Builder

Run the `Put` monad

# Flushing the implicit parse state

flush :: Put

Pop the ByteString we have constructed so far, if any, yielding a new chunk in the result ByteString.

# Primitives

putWord8 :: Word8 -> Put

Efficiently write a byte into the output buffer

putByteString :: ByteString -> Put

An efficient primitive to write a strict ByteString into the output buffer. It flushes the current buffer, and writes the argument into a new chunk.

putLazyByteString :: ByteString -> Put

Write a lazy ByteString efficiently, simply appending the lazy ByteString chunks to the output buffer

# Big-endian primitives

putWord16be :: Word16 -> Put

Write a Word16 in big endian format

putWord32be :: Word32 -> Put

Write a Word32 in big endian format

putWord64be :: Word64 -> Put

Write a Word64 in big endian format

# Little-endian primitives

putWord16le :: Word16 -> Put

Write a Word16 in little endian format

putWord32le :: Word32 -> Put

Write a Word32 in little endian format

putWord64le :: Word64 -> Put

Write a Word64 in little endian format

# Host-endian, unaligned writes

putWordhost :: Word -> Put

O(1). Write a single native machine word. The word is written in host order, host endian form, for the machine you're on. On a 64 bit machine the Word is an 8 byte value, on a 32 bit machine, 4 bytes. Values written this way are not portable to different endian or word sized machines, without conversion.

putWord16host :: Word16 -> Put

O(1). Write a Word16 in native host order and host endianness. For portability issues see `putWordhost`.

putWord32host :: Word32 -> Put

O(1). Write a Word32 in native host order and host endianness. For portability issues see `putWordhost`.

putWord64host :: Word64 -> Put

O(1). Write a Word64 in native host order On a 32 bit machine we write two host order Word32s, in big endian form. For portability issues see `putWordhost`.