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%global pkg_name bitvec
%global pkgver %{pkg_name}-%{version}
%bcond_with tests
Name: ghc-%{pkg_name}
Version: 1.1.5.0
Release: 1
Summary: Space-efficient bit vectors
License: BSD-3-Clause
URL: https://hackage.haskell.org/package/%{pkg_name}
Source0: https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
BuildRequires: ghc-Cabal-devel
BuildRequires: ghc-base-devel
BuildRequires: ghc-base-prof
BuildRequires: ghc-bytestring-devel
BuildRequires: ghc-bytestring-prof
BuildRequires: ghc-deepseq-devel
BuildRequires: ghc-deepseq-prof
BuildRequires: ghc-primitive-devel
BuildRequires: ghc-primitive-prof
BuildRequires: ghc-rpm-macros
BuildRequires: ghc-vector-devel
BuildRequires: ghc-vector-prof
ExcludeArch: %{ix86}
%if %{with tests}
BuildRequires: ghc-quickcheck-classes-base-devel
BuildRequires: ghc-quickcheck-classes-base-prof
BuildRequires: ghc-quickcheck-classes-devel
BuildRequires: ghc-quickcheck-classes-prof
BuildRequires: ghc-tasty-devel
BuildRequires: ghc-tasty-prof
BuildRequires: ghc-tasty-quickcheck-devel
BuildRequires: ghc-tasty-quickcheck-prof
%endif
%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.
%package devel
Summary: Haskell %{pkg_name} library development files
Requires: %{name} = %{version}-%{release}
Requires: ghc-compiler = %{ghc_version}
Requires(post): ghc-compiler = %{ghc_version}
Requires(postun): ghc-compiler = %{ghc_version}
%description devel
This package provides the Haskell %{pkg_name} library development files.
%package -n ghc-%{pkg_name}-help
Summary: Haskell %{pkg_name} library documentation
BuildArch: noarch
%description -n ghc-%{pkg_name}-help
This package provides the Haskell %{pkg_name} library documentation.
%package -n ghc-%{pkg_name}-prof
Summary: Haskell %{pkg_name} profiling library
Requires: ghc-%{pkg_name}-devel = %{version}-%{release}
Supplements: (ghc-%{pkg_name}-devel and ghc-prof)
%description -n ghc-%{pkg_name}-prof
This package provides the Haskell %{pkg_name} profiling library.
%prep
%autosetup -n %{pkg_name}-%{version}
%build
%ghc_lib_build
%install
%ghc_lib_install
%check
%cabal_test
%post devel
%ghc_pkg_recache
%postun devel
%ghc_pkg_recache
%files -f %{name}.files
%license LICENSE
%files devel -f %{name}-devel.files
%doc README.md changelog.md
%files -n ghc-%{pkg_name}-help -f ghc-%{pkg_name}-help.files
%license LICENSE
%files -n ghc-%{pkg_name}-prof -f ghc-%{pkg_name}-prof.files
%changelog
* Thu Sep 28 2023 Lin Runze <lrzlin@163.com> 1.1.5.0-1
- Initial packaging (Version 1.1.5.0)
|
