194 lines
7.4 KiB
Plaintext
194 lines
7.4 KiB
Plaintext
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// Boost string_algo library iter_find.hpp header file ---------------------------//
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// Copyright Pavol Droba 2002-2003.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/ for updates, documentation, and revision history.
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#ifndef BOOST_STRING_ITER_FIND_HPP
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#define BOOST_STRING_ITER_FIND_HPP
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#include <boost/algorithm/string/config.hpp>
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#include <algorithm>
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#include <iterator>
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#include <boost/iterator/transform_iterator.hpp>
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#include <boost/range/iterator_range_core.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/range/value_type.hpp>
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#include <boost/range/as_literal.hpp>
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#include <boost/algorithm/string/concept.hpp>
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#include <boost/algorithm/string/find_iterator.hpp>
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#include <boost/algorithm/string/detail/util.hpp>
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/*! \file
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Defines generic split algorithms. Split algorithms can be
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used to divide a sequence into several part according
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to a given criteria. Result is given as a 'container
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of containers' where elements are copies or references
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to extracted parts.
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There are two algorithms provided. One iterates over matching
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substrings, the other one over the gaps between these matches.
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*/
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namespace boost {
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namespace algorithm {
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// iterate find ---------------------------------------------------//
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//! Iter find algorithm
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/*!
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This algorithm executes a given finder in iteration on the input,
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until the end of input is reached, or no match is found.
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Iteration is done using built-in find_iterator, so the real
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searching is performed only when needed.
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In each iteration new match is found and added to the result.
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\param Result A 'container container' to contain the result of search.
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Both outer and inner container must have constructor taking a pair
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of iterators as an argument.
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Typical type of the result is
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\c std::vector<boost::iterator_range<iterator>>
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(each element of such a vector will container a range delimiting
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a match).
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\param Input A container which will be searched.
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\param Finder A Finder object used for searching
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\return A reference to the result
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\note Prior content of the result will be overwritten.
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*/
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template<
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typename SequenceSequenceT,
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typename RangeT,
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typename FinderT >
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inline SequenceSequenceT&
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iter_find(
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SequenceSequenceT& Result,
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RangeT& Input,
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FinderT Finder )
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{
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BOOST_CONCEPT_ASSERT((
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FinderConcept<
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FinderT,
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BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
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));
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iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_input(::boost::as_literal(Input));
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typedef BOOST_STRING_TYPENAME
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range_iterator<RangeT>::type input_iterator_type;
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typedef find_iterator<input_iterator_type> find_iterator_type;
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typedef detail::copy_iterator_rangeF<
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BOOST_STRING_TYPENAME
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range_value<SequenceSequenceT>::type,
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input_iterator_type> copy_range_type;
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input_iterator_type InputEnd=::boost::end(lit_input);
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typedef transform_iterator<copy_range_type, find_iterator_type>
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transform_iter_type;
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transform_iter_type itBegin=
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::boost::make_transform_iterator(
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find_iterator_type( ::boost::begin(lit_input), InputEnd, Finder ),
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copy_range_type());
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transform_iter_type itEnd=
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::boost::make_transform_iterator(
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find_iterator_type(),
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copy_range_type());
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SequenceSequenceT Tmp(itBegin, itEnd);
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Result.swap(Tmp);
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return Result;
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}
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// iterate split ---------------------------------------------------//
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//! Split find algorithm
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/*!
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This algorithm executes a given finder in iteration on the input,
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until the end of input is reached, or no match is found.
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Iteration is done using built-in find_iterator, so the real
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searching is performed only when needed.
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Each match is used as a separator of segments. These segments are then
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returned in the result.
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\param Result A 'container container' to contain the result of search.
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Both outer and inner container must have constructor taking a pair
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of iterators as an argument.
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Typical type of the result is
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\c std::vector<boost::iterator_range<iterator>>
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(each element of such a vector will container a range delimiting
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a match).
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\param Input A container which will be searched.
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\param Finder A finder object used for searching
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\return A reference to the result
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\note Prior content of the result will be overwritten.
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*/
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template<
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typename SequenceSequenceT,
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typename RangeT,
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typename FinderT >
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inline SequenceSequenceT&
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iter_split(
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SequenceSequenceT& Result,
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RangeT& Input,
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FinderT Finder )
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{
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BOOST_CONCEPT_ASSERT((
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FinderConcept<FinderT,
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BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
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));
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iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_input(::boost::as_literal(Input));
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typedef BOOST_STRING_TYPENAME
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range_iterator<RangeT>::type input_iterator_type;
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typedef split_iterator<input_iterator_type> find_iterator_type;
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typedef detail::copy_iterator_rangeF<
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BOOST_STRING_TYPENAME
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range_value<SequenceSequenceT>::type,
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input_iterator_type> copy_range_type;
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input_iterator_type InputEnd=::boost::end(lit_input);
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typedef transform_iterator<copy_range_type, find_iterator_type>
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transform_iter_type;
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transform_iter_type itBegin=
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::boost::make_transform_iterator(
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find_iterator_type( ::boost::begin(lit_input), InputEnd, Finder ),
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copy_range_type() );
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transform_iter_type itEnd=
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::boost::make_transform_iterator(
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find_iterator_type(),
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copy_range_type() );
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SequenceSequenceT Tmp(itBegin, itEnd);
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Result.swap(Tmp);
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return Result;
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}
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} // namespace algorithm
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// pull names to the boost namespace
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using algorithm::iter_find;
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using algorithm::iter_split;
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} // namespace boost
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#endif // BOOST_STRING_ITER_FIND_HPP
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