ghc-bitvec/bitvec.cabal

name: bitvec
version: 1.1.5.0
x-revision: 2
cabal-version: 2.0
build-type: Simple
license: BSD3
license-file: LICENSE
copyright: 2019-2022 Andrew Lelechenko, 2012-2016 James Cook
maintainer: Andrew Lelechenko <andrew.lelechenko@gmail.com>
homepage: https://github.com/Bodigrim/bitvec
synopsis: Space-efficient bit vectors
description:
  A newtype over 'Bool' with a better 'Vector' instance: 8x less memory, up to 3500x faster.
  .
  The <https://hackage.haskell.org/package/vector vector>
  package represents unboxed arrays of 'Bool's
  spending 1 byte (8 bits) per boolean.
  This library provides a newtype wrapper 'Bit' and a custom instance
  of an unboxed 'Vector', which packs bits densely,
  achieving an __8x smaller memory footprint.__
  The performance stays mostly the same;
  the most significant degradation happens for random writes
  (up to 10% slower).
  On the other hand, for certain bulk bit operations
  'Vector' 'Bit' is up to 3500x faster than 'Vector' 'Bool'.
  .
  === Thread safety
  .
  * "Data.Bit" is faster, but writes and flips are not thread-safe.
    This is because naive updates are not atomic:
    they read the whole word from memory,
    then modify a bit, then write the whole word back.
    Concurrently modifying non-intersecting slices of the same underlying array
    may also lead to unexpected results, since they can share a word in memory.
  * "Data.Bit.ThreadSafe" is slower (usually 10-20%),
    but writes and flips are thread-safe.
    Additionally, concurrently modifying non-intersecting slices of the same underlying array
    works as expected. However, operations that affect multiple elements are not
    guaranteed to be atomic.
  .
  === Similar packages
  .
  * <https://hackage.haskell.org/package/bv bv> and
    <https://hackage.haskell.org/package/bv-little bv-little>
    do not offer mutable vectors.
  .
  * <https://hackage.haskell.org/package/array array>
    is memory-efficient for 'Bool', but lacks
    a handy 'Vector' interface and is not thread-safe.

category: Data, Bit Vectors
author: Andrew Lelechenko <andrew.lelechenko@gmail.com>,
        James Cook <mokus@deepbondi.net>

tested-with: GHC ==8.4.4 GHC ==8.6.5 GHC ==8.8.1 GHC ==8.8.2 GHC ==8.8.4 GHC ==8.10.7 GHC ==9.0.2 GHC ==9.2.7 GHC ==9.4.4 GHC ==9.6.1
extra-doc-files:
  changelog.md
  README.md

source-repository head
  type: git
  location: git://github.com/Bodigrim/bitvec.git

flag simd
  description:
    Use a C SIMD implementation for the ultimate performance of `zipBits`, `invertBits` and `countBits`.
    Disable this flag if there are problems with the C FFI.
  default: True
  manual: True

library
  exposed-modules:
    Data.Bit
    Data.Bit.ThreadSafe
  build-depends:
    base >=4.11 && <5,
    bytestring >=0.10 && <0.13,
    deepseq <1.6,
    primitive >=0.5,
    vector >=0.11 && <0.14
  default-language: Haskell2010
  hs-source-dirs: src
  other-modules:
    Data.Bit.F2Poly
    Data.Bit.F2PolyTS
    Data.Bit.Immutable
    Data.Bit.ImmutableTS
    Data.Bit.Internal
    Data.Bit.InternalTS
    Data.Bit.Mutable
    Data.Bit.MutableTS
    Data.Bit.PdepPext
    Data.Bit.Utils
  ghc-options: -O2 -Wall -Wcompat
  include-dirs: src

  if impl(ghc <9.0)
    build-depends: integer-gmp
  else
    build-depends: ghc-bignum

  if flag(simd) && !arch(javascript) && !arch(wasm32)
    c-sources: cbits/bitvec_simd.c
    cc-options: -fopenmp-simd
    cpp-options: -DUseSIMD
    other-modules:
      Data.Bit.SIMD

test-suite bitvec-tests
  type: exitcode-stdio-1.0
  main-is: Main.hs
  build-depends:
    base,
    bitvec,
    primitive >=0.5 && <0.10,
    quickcheck-classes-base <0.7,
    quickcheck-classes >=0.6.1 && <0.7,
    vector >=0.11,
    tasty <1.6,
    tasty-quickcheck <0.12
  default-language: Haskell2010
  hs-source-dirs: test
  other-modules:
    Support
    Tests.Conc
    Tests.F2Poly
    Tests.MVector
    Tests.MVectorTS
    Tests.SetOps
    Tests.SetOpsTS
    Tests.Vector
  ghc-options: -Wall -threaded -rtsopts -Wcompat
  include-dirs: test

  if impl(ghc <9.0)
    build-depends: integer-gmp <1.2
  else
    build-depends: ghc-bignum

benchmark bitvec-bench
  build-depends:
    base,
    bitvec,
    containers <0.8,
    random <1.3,
    tasty,
    tasty-bench >=0.3.2 && <0.5,
    vector
  type: exitcode-stdio-1.0
  main-is: Bench.hs
  default-language: Haskell2010
  hs-source-dirs: bench
  other-modules:
    Bench.BitIndex
    Bench.Common
    Bench.GCD
    Bench.Invert
    Bench.Intersection
    Bench.Product
    Bench.RandomFlip
    Bench.RandomRead
    Bench.RandomWrite
    Bench.Remainder
    Bench.Reverse
    Bench.Sum
    Bench.Union
  ghc-options: -O2 -Wall -Wcompat

  if impl(ghc <9.0)
    build-depends: integer-gmp
  else
    build-depends: ghc-bignum