e698d9c833
OBS-URL: https://build.opensuse.org/package/show/devel:languages:haskell/ghc-scientific?expand=0&rev=66
113 lines
3.7 KiB
RPMSpec
113 lines
3.7 KiB
RPMSpec
#
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# spec file for package ghc-scientific
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#
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# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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# upon. The license for this file, and modifications and additions to the
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# file, is the same license as for the pristine package itself (unless the
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# license for the pristine package is not an Open Source License, in which
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# case the license is the MIT License). An "Open Source License" is a
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# license that conforms to the Open Source Definition (Version 1.9)
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# published by the Open Source Initiative.
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# Please submit bugfixes or comments via https://bugs.opensuse.org/
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#
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%global pkg_name scientific
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%bcond_with tests
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Name: ghc-%{pkg_name}
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Version: 0.3.6.2
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Release: 0
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Summary: Numbers represented using scientific notation
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License: BSD-3-Clause
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URL: https://hackage.haskell.org/package/%{pkg_name}
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Source0: https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
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BuildRequires: ghc-Cabal-devel
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BuildRequires: ghc-binary-devel
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BuildRequires: ghc-bytestring-devel
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BuildRequires: ghc-containers-devel
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BuildRequires: ghc-deepseq-devel
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BuildRequires: ghc-hashable-devel
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BuildRequires: ghc-integer-logarithms-devel
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BuildRequires: ghc-primitive-devel
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BuildRequires: ghc-rpm-macros
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BuildRequires: ghc-text-devel
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%if %{with tests}
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BuildRequires: ghc-QuickCheck-devel
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BuildRequires: ghc-smallcheck-devel
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BuildRequires: ghc-tasty-ant-xml-devel
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BuildRequires: ghc-tasty-devel
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BuildRequires: ghc-tasty-hunit-devel
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BuildRequires: ghc-tasty-quickcheck-devel
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BuildRequires: ghc-tasty-smallcheck-devel
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%endif
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%description
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"Data.Scientific" provides the number type 'Scientific'. Scientific numbers are
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arbitrary precision and space efficient. They are represented using
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<http://en.wikipedia.org/wiki/Scientific_notation scientific notation>.
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The implementation uses a coefficient 'c :: 'Integer'' and a base-10 exponent
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'e :: 'Int''. A scientific number corresponds to the 'Fractional' number:
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''fromInteger' c * 10 '^^' e'.
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Note that since we're using an 'Int' to represent the exponent these numbers
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aren't truly arbitrary precision. I intend to change the type of the exponent
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to 'Integer' in a future release.
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The main application of 'Scientific' is to be used as the target of parsing
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arbitrary precision numbers coming from an untrusted source. The advantages
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over using 'Rational' for this are that:
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* A 'Scientific' is more efficient to construct. Rational numbers need to be
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constructed using '%' which has to compute the 'gcd' of the 'numerator' and
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'denominator'.
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* 'Scientific' is safe against numbers with huge exponents. For example:
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'1e1000000000 :: 'Rational'' will fill up all space and crash your program.
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Scientific works as expected:
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>>> read "1e1000000000" :: Scientific 1.0e1000000000
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* Also, the space usage of converting scientific numbers with huge exponents to
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''Integral's' (like: 'Int') or ''RealFloat's' (like: 'Double' or 'Float') will
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always be bounded by the target type.
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%package devel
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Summary: Haskell %{pkg_name} library development files
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Requires: %{name} = %{version}-%{release}
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Requires: ghc-compiler = %{ghc_version}
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Requires(post): ghc-compiler = %{ghc_version}
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Requires(postun): ghc-compiler = %{ghc_version}
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%description devel
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This package provides the Haskell %{pkg_name} library development files.
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%prep
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%setup -q -n %{pkg_name}-%{version}
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%build
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%ghc_lib_build
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%install
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%ghc_lib_install
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%check
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%cabal_test
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%post devel
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%ghc_pkg_recache
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%postun devel
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%ghc_pkg_recache
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%files -f %{name}.files
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%license LICENSE
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%files devel -f %{name}-devel.files
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%doc changelog
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%changelog
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