Copyright	Lennart Kolmodin Ross Paterson
License	BSD3-style (see LICENSE)
Maintainer	Lennart Kolmodin <kolmodin@gmail.com>
Stability	experimental
Portability	portable to Hugs and GHC
Safe Haskell	Safe
Language	Haskell98

Data.Binary.Builder

Contents

The Builder type
Constructing Builders
Flushing the buffer state
Derived Builders

Description

Efficient constructions of lazy bytestrings.

This now re-exports Builder.

Synopsis

data Builder
toLazyByteString :: Builder -> ByteString
empty :: Builder
singleton :: Word8 -> Builder
append :: Builder -> Builder -> Builder
fromByteString :: ByteString -> Builder
fromLazyByteString :: ByteString -> Builder
fromShortByteString :: ShortByteString -> Builder
flush :: Builder
putWord16be :: Word16 -> Builder
putWord32be :: Word32 -> Builder
putWord64be :: Word64 -> Builder
putInt16be :: Int16 -> Builder
putInt32be :: Int32 -> Builder
putInt64be :: Int64 -> Builder
putWord16le :: Word16 -> Builder
putWord32le :: Word32 -> Builder
putWord64le :: Word64 -> Builder
putInt16le :: Int16 -> Builder
putInt32le :: Int32 -> Builder
putInt64le :: Int64 -> Builder
putWordhost :: Word -> Builder
putWord16host :: Word16 -> Builder
putWord32host :: Word32 -> Builder
putWord64host :: Word64 -> Builder
putInthost :: Int -> Builder
putInt16host :: Int16 -> Builder
putInt32host :: Int32 -> Builder
putInt64host :: Int64 -> Builder
putCharUtf8 :: Char -> Builder
putStringUtf8 :: String -> Builder

The Builder type

data Builder Source #

Builders denote sequences of bytes. They are Monoids where mempty is the zero-length sequence and mappend is concatenation, which runs in O(1).

Instances

Semigroup Builder
Instance details Defined in Data.ByteString.Builder.Internal Methods (<>) :: Builder -> Builder -> Builder Source # sconcat :: NonEmpty Builder -> Builder Source # stimes :: Integral b => b -> Builder -> Builder Source #
Monoid Builder
Instance details Defined in Data.ByteString.Builder.Internal Methods mempty :: Builder Source # mappend :: Builder -> Builder -> Builder Source # mconcat :: [Builder] -> Builder Source #

toLazyByteString :: Builder -> ByteString Source #

Execute a Builder and return the generated chunks as a lazy ByteString. The work is performed lazy, i.e., only when a chunk of the lazy ByteString is forced.

Constructing Builders

empty :: Builder Source #

O(1). The empty Builder, satisfying

```
toLazyByteString empty = empty
```

singleton :: Word8 -> Builder Source #

O(1). A Builder taking a single byte, satisfying

toLazyByteString (singleton b) = singleton b

append :: Builder -> Builder -> Builder Source #

O(1). The concatenation of two Builders, an associative operation with identity empty, satisfying

toLazyByteString (append x y) = append (toLazyByteString x) (toLazyByteString y)

fromByteString :: ByteString -> Builder Source #

O(1). A Builder taking a ByteString, satisfying

toLazyByteString (fromByteString bs) = fromChunks [bs]

fromLazyByteString :: ByteString -> Builder Source #

O(1). A Builder taking a lazy ByteString, satisfying

toLazyByteString (fromLazyByteString bs) = bs

fromShortByteString :: ShortByteString -> Builder Source #

O(n). A builder taking ShortByteString and copy it to a Builder, satisfying

@toLazyByteString (fromShortByteString bs) = fromChunks [fromShort bs]

Flushing the buffer state

flush :: Builder Source #

Flush the current buffer. This introduces a chunk boundary.

Derived Builders

Big-endian writes

putWord16be :: Word16 -> Builder Source #

Write a Word16 in big endian format

putWord32be :: Word32 -> Builder Source #

Write a Word32 in big endian format

putWord64be :: Word64 -> Builder Source #

Write a Word64 in big endian format

putInt16be :: Int16 -> Builder Source #

Write a Int16 in big endian format

putInt32be :: Int32 -> Builder Source #

Write a Int32 in big endian format

putInt64be :: Int64 -> Builder Source #

Write a Int64 in big endian format

Little-endian writes

putWord16le :: Word16 -> Builder Source #

Write a Word16 in little endian format

putWord32le :: Word32 -> Builder Source #

Write a Word32 in little endian format

putWord64le :: Word64 -> Builder Source #

Write a Word64 in little endian format

putInt16le :: Int16 -> Builder Source #

Write a Int16 in little endian format

putInt32le :: Int32 -> Builder Source #

Write a Int32 in little endian format

putInt64le :: Int64 -> Builder Source #

Write a Int64 in little endian format

O(1). A Builder taking 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 -> Builder Source #

Write a Word16 in native host order and host endianness. 2 bytes will be written, unaligned.

putWord32host :: Word32 -> Builder Source #

Write a Word32 in native host order and host endianness. 4 bytes will be written, unaligned.

putWord64host :: Word64 -> Builder Source #

Write a Word64 in native host order. On a 32 bit machine we write two host order Word32s, in big endian form. 8 bytes will be written, unaligned.

putInthost :: Int -> Builder Source #

O(1). A Builder taking 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 Int 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.

putInt16host :: Int16 -> Builder Source #

Write a Int16 in native host order and host endianness. 2 bytes will be written, unaligned.

putInt32host :: Int32 -> Builder Source #

Write a Int32 in native host order and host endianness. 4 bytes will be written, unaligned.

putInt64host :: Int64 -> Builder Source #

Write a Int64 in native host order. On a 32 bit machine we write two host order Int32s, in big endian form. 8 bytes will be written, unaligned.