byteslice

Slicing managed and unmanaged memory

https://github.com/byteverse/byteslice

LTS Haskell 24.33:0.2.15.0
Stackage Nightly 2026-03-13:0.2.15.0
Latest on Hackage:0.2.15.0

See all snapshots byteslice appears in

BSD-3-Clause licensed by Andrew Martin
Maintained by [email protected]
This version can be pinned in stack with:byteslice-0.2.15.0@sha256:468a74ea985d0a6e904ca5e0e3e08f780df7ff679aa62e276e11c990ff4f1cb7,3153

Module documentation for 0.2.15.0

  • Data
    • Data.Bytes
      • Data.Bytes.Chunks
      • Data.Bytes.Encode
        • Data.Bytes.Encode.BigEndian
        • Data.Bytes.Encode.LittleEndian
      • Data.Bytes.Indexed
      • Data.Bytes.Internal
      • Data.Bytes.Mutable
      • Data.Bytes.Text
        • Data.Bytes.Text.Ascii
        • Data.Bytes.Text.AsciiExt
        • Data.Bytes.Text.Latin1
        • Data.Bytes.Text.Utf8
        • Data.Bytes.Text.Windows1252
      • Data.Bytes.Types
Depends on 11 packages(full list with versions):
Used by 4 packages in nightly-2026-03-13(full list with versions):
bytebuild, bytehash, bytesmith, chronos

byteslice

Purpose

Types for dealing with slices of ‘ByteArray’ and ‘MutableByteArray’. These are never supposed to introduce overhead. Rather, they exist to clarify intent in type signatures.

receive ::
     Resource -- ^ Some scarce resource
  -> MutableByteArray RealWorld -- ^ Buffer
  -> Int -- ^ Offset
  -> Int -- ^ Length
  -> IO ()

With this library, we instead write

receive ::
     Resource -- ^ Some scarce resource
  -> MutableBytes RealWorld -- ^ Buffer
  -> IO ()

The combination of the worker-wrapper transformation and inlining means that we can expect these two to end up generating the same code in most situations.

Changes

Revision history for byteslice

0.2.15.0 – 2024-06-12

  • Add functions for recovering length from ByteArrayN
  • Add Data.Bytes.Indexed for functions on ByteArrayN

0.2.14.0 – 2024-02-26

  • Add functions to Data.Bytes.Text.AsciiExt: split(1|2|3|4), splitTetragram1, anyEq, takeWhileNotEq, dropWhileNotEq, takeWhileEndNotEq, dropWhileEndEq`.
  • Increment upper bound on primitive-unlifted

0.2.13.2 – 2024-02-06

  • Restore Data.Bytes.Text.Utf8.toText.

0.2.13.1 – 2024-02-01

  • Update package metadata.

0.2.13.0 – 2024-01-12

  • Add replicate and replicateByte to Data.Bytes.Chunks.

0.2.12.0 – 2023-12-14

  • Add Data.Bytes.Chunks.cons.
  • Add Data.Bytes.fromLazyByteString.
  • Allow building with GHC 9.8.

0.2.11.1 – 2023-07-26

  • Fix regression causing build failure in GHC 9.2.

0.2.11.0 – 2023-07-25

  • Add Data.Bytes.Encode.LittleEndian.
  • Add splitTetragram1.

0.2.10.0 – 2023-05-01

  • Add equals13, equals14, equals15.
  • Add Show instances for BytesN and ByteArrayN.
  • Add equalsCStringCaseInsensitive for ascii text.

0.2.9.0 – 2022-12-08

  • Add toShortText, toShortTextU, and toText to Data.Byte.Text.Ascii.
  • Add fromShortText and fromText to Data.Bytes.Text.Utf8.

0.2.8.0 – 2022-11-21

  • Add Data.Bytes.replace and Data.Bytes.findIndices
  • Add Data.Bytes.fromShortText
  • Add Data.Bytes.fromPrimArray
  • Add decodeDecWord
  • Add concatArray and concatArrayU.

0.2.7.0 – 2022-02-16

  • Add support for GHC 9.2.
  • Drop support for GHC 8.8 and earlier.
  • Add foldlM and foldrM for mondic folds over byte sequences.

0.2.6.0 – 2021-09-15

  • Add BytesN and ByteArrayN.
  • Add isInfixOf.
  • Add hForLines_ and hFoldLines.
  • Add lift and unlift for converting between Bytes and Bytes#.
  • Move text-oriented functions from Data.Bytes to Data.Bytes.Text.*. Provide aliases with older names that come with deprecation warning.

0.2.5.2 – 2021-02-23

  • Correct compatibility shims.

0.2.5.1 – 2021-02-22 (deprecated)

  • Compatibility with GHC 9.0.

0.2.5.0 – 2021-01-22

  • Add Data.Bytes.Chunks.concatByteString.
  • Expose pinnedToByteString to end users.

0.2.4.0 – 2020-10-15

  • Add toByteString and fromByteString.
  • Add fromShortByteString.
  • Add equalsLatin(9|10|11|12).
  • Add toPinnedByteArray, toPinnedByteArrayClone, and concatPinnedU.
  • Add toLowerAsciiByteArrayClone.
  • Add intercalateByte2.
  • Add splitEnd1.

0.2.3.0 – 2020-04-30

  • Add fnv1a32 and fnv1a64, implementations of the 32-bit and 64-bit variants of the FNV-1a hash algorithm, to both Data.Bytes and Data.Bytes.Chunks.
  • Add Data.Bytes.Chunks.null.
  • Add readFile to both Data.Bytes and Data.Bytes.Chunks.
  • Add foldl' to Data.Bytes.Chunks.
  • Add split to Data.Bytes.Chunks.
  • Add splitStream for splitting as a good stream-fusion producer.
  • Add hPut and writeFile to Data.Bytes.Chunks.
  • Add fromCString#.
  • Add Bytes# newtype on GHC 8.10 and up.

0.2.2.0 – 2020-02-27

  • Add split4.
  • Add equalsCString.
  • Add stripCStringPrefix.
  • Add equalsLatin8.
  • Add emptyPinned.
  • Add concatPinned to Data.Bytes.Chunks.
  • Add any and all.

0.2.1.0 – 2020-01-22

  • Add longestCommonPrefix.
  • Fix broken Ord instance of Bytes.

0.2.0.0 – 2020-01-20

  • Change behavior of split. This function previously had a special case for zero-length byte sequences to mirror the behavior bytestring’s behavior. Now, split returns a singleton list with the empty byte sequence in this case.
  • Add splitNonEmpty so that users who need to take advantage of the non-null guarantee split provides can do so.
  • Add splitU and splitInitU for users who are going to split a byte sequence without and consume the results more than once.
  • Make the C code compile on platforms that do not have rawmemchr.
  • Rename splitOnce to split1.
  • Add split2 and split3.
  • Add equalsLatin{1,2,3,4,5,6,7}
  • Add ifoldl'.
  • Add hGet and hPut.
  • Move Data.Bytes.Chunks from small-bytearray-builder to byteslice.
  • Rename Data.Bytes.Chunks.concat to concatU (the U means unsliced), and add a new concat that returns Bytes.
  • Add fromBytes, fromByteArray, and unsafeCopy to Data.Bytes.Chunks.
  • Add hGetContents to Data.Bytes.Chunks.
  • Add isBytePrefixOf and isByteSuffixOf.
  • Add replicate and replicateU.
  • Add Monoid instance for Bytes.
  • Add singleton, doubleton, tripleton, and their unsliced variants.
  • Rename copy to unsafeCopy.
  • Add fromLatinString.
  • Change the behavior of fromAsciiString to replace out-of-bounds codepoints with NUL.
  • Add unsnoc and uncons.

0.1.4.0 – 2019-11-12

  • Add toLatinString.
  • Add stripPrefix, stripSuffix, stripOptionalPrefix, and stripOptionalSuffix.
  • Add takeWhileEnd and dropWhileEnd.
  • Add count.
  • Add an optimized split function.
  • Add splitInit.
  • Add splitFirst.
  • Add copy.
  • Add pin.
  • Add touch.
  • Add elem.
  • Add unsafeIndex.

0.1.3.0 – 2019-09-15

  • Add isPrefixOf and isSuffixOf.
  • Add foldl, foldr, foldl', and foldr'.

0.1.2.0 – 2019-08-21

  • Add Data.Bytes.Mutable module.
  • Add Data.Bytes module.

0.1.1.0 – 2019-07-03

  • Add record labels for Bytes and MutableBytes
  • Add UnmanagedBytes. This is just an Addr and a length.

0.1.0.0 – 2019-04-30

  • First version.