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Diffstat (limited to 'ext/boost/algorithm/string/compare.hpp')
| -rw-r--r-- | ext/boost/algorithm/string/compare.hpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/ext/boost/algorithm/string/compare.hpp b/ext/boost/algorithm/string/compare.hpp new file mode 100644 index 0000000000..734303a9a9 --- /dev/null +++ b/ext/boost/algorithm/string/compare.hpp @@ -0,0 +1,199 @@ +// Boost string_algo library compare.hpp header file -------------------------// + +// Copyright Pavol Droba 2002-2006. +// +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +// See http://www.boost.org/ for updates, documentation, and revision history. + +#ifndef BOOST_STRING_COMPARE_HPP +#define BOOST_STRING_COMPARE_HPP + +#include <boost/algorithm/string/config.hpp> +#include <locale> + +/*! \file + Defines element comparison predicates. Many algorithms in this library can + take an additional argument with a predicate used to compare elements. + This makes it possible, for instance, to have case insensitive versions + of the algorithms. +*/ + +namespace boost { + namespace algorithm { + + // is_equal functor -----------------------------------------------// + + //! is_equal functor + /*! + Standard STL equal_to only handle comparison between arguments + of the same type. This is a less restrictive version which wraps operator ==. + */ + struct is_equal + { + //! Function operator + /*! + Compare two operands for equality + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + return Arg1==Arg2; + } + }; + + //! case insensitive version of is_equal + /*! + Case insensitive comparison predicate. Comparison is done using + specified locales. + */ + struct is_iequal + { + //! Constructor + /*! + \param Loc locales used for comparison + */ + is_iequal( const std::locale& Loc=std::locale() ) : + m_Loc( Loc ) {} + + //! Function operator + /*! + Compare two operands. Case is ignored. + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL) + return std::toupper(Arg1)==std::toupper(Arg2); + #else + return std::toupper<T1>(Arg1,m_Loc)==std::toupper<T2>(Arg2,m_Loc); + #endif + } + + private: + std::locale m_Loc; + }; + + // is_less functor -----------------------------------------------// + + //! is_less functor + /*! + Convenient version of standard std::less. Operation is templated, therefore it is + not required to specify the exact types upon the construction + */ + struct is_less + { + //! Functor operation + /*! + Compare two operands using > operator + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + return Arg1<Arg2; + } + }; + + + //! case insensitive version of is_less + /*! + Case insensitive comparison predicate. Comparison is done using + specified locales. + */ + struct is_iless + { + //! Constructor + /*! + \param Loc locales used for comparison + */ + is_iless( const std::locale& Loc=std::locale() ) : + m_Loc( Loc ) {} + + //! Function operator + /*! + Compare two operands. Case is ignored. + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL) + return std::toupper(Arg1)<std::toupper(Arg2); + #else + return std::toupper<T1>(Arg1,m_Loc)<std::toupper<T2>(Arg2,m_Loc); + #endif + } + + private: + std::locale m_Loc; + }; + + // is_not_greater functor -----------------------------------------------// + + //! is_not_greater functor + /*! + Convenient version of standard std::not_greater_to. Operation is templated, therefore it is + not required to specify the exact types upon the construction + */ + struct is_not_greater + { + //! Functor operation + /*! + Compare two operands using > operator + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + return Arg1<=Arg2; + } + }; + + + //! case insensitive version of is_not_greater + /*! + Case insensitive comparison predicate. Comparison is done using + specified locales. + */ + struct is_not_igreater + { + //! Constructor + /*! + \param Loc locales used for comparison + */ + is_not_igreater( const std::locale& Loc=std::locale() ) : + m_Loc( Loc ) {} + + //! Function operator + /*! + Compare two operands. Case is ignored. + */ + template< typename T1, typename T2 > + bool operator()( const T1& Arg1, const T2& Arg2 ) const + { + #if defined(__BORLANDC__) && (__BORLANDC__ >= 0x560) && (__BORLANDC__ <= 0x564) && !defined(_USE_OLD_RW_STL) + return std::toupper(Arg1)<=std::toupper(Arg2); + #else + return std::toupper<T1>(Arg1,m_Loc)<=std::toupper<T2>(Arg2,m_Loc); + #endif + } + + private: + std::locale m_Loc; + }; + + + } // namespace algorithm + + // pull names to the boost namespace + using algorithm::is_equal; + using algorithm::is_iequal; + using algorithm::is_less; + using algorithm::is_iless; + using algorithm::is_not_greater; + using algorithm::is_not_igreater; + +} // namespace boost + + +#endif // BOOST_STRING_COMPARE_HPP |