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// Boost string_algo library find.hpp header file ---------------------------//
// Copyright Pavol Droba 2002-2003.
//
// 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_FIND_HPP
#define BOOST_STRING_FIND_HPP
#include <boost/algorithm/string/config.hpp>
#include <boost/range/iterator_range.hpp>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/range/iterator.hpp>
#include <boost/range/as_literal.hpp>
#include <boost/algorithm/string/finder.hpp>
#include <boost/algorithm/string/compare.hpp>
#include <boost/algorithm/string/constants.hpp>
/*! \file
Defines a set of find algorithms. The algorithms are searching
for a substring of the input. The result is given as an \c iterator_range
delimiting the substring.
*/
namespace boost {
namespace algorithm {
// Generic find -----------------------------------------------//
//! Generic find algorithm
/*!
Search the input using the given finder.
\param Input A string which will be searched.
\param Finder Finder object used for searching.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c RangeT::iterator or
\c RangeT::const_iterator, depending on the constness of
the input parameter.
*/
template<typename RangeT, typename FinderT>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
find(
RangeT& Input,
const FinderT& Finder)
{
iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_input(::boost::as_literal(Input));
return Finder(::boost::begin(lit_input),::boost::end(lit_input));
}
// find_first -----------------------------------------------//
//! Find first algorithm
/*!
Search for the first occurrence of the substring in the input.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c RangeT::iterator or
\c RangeT::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
find_first(
Range1T& Input,
const Range2T& Search)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::first_finder(Search));
}
//! Find first algorithm ( case insensitive )
/*!
Search for the first occurence of the substring in the input.
Searching is case insensitive.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\param Loc A locale used for case insensitive comparison
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
ifind_first(
Range1T& Input,
const Range2T& Search,
const std::locale& Loc=std::locale())
{
return ::boost::algorithm::find(Input, ::boost::algorithm::first_finder(Search,is_iequal(Loc)));
}
// find_last -----------------------------------------------//
//! Find last algorithm
/*!
Search for the last occurrence of the substring in the input.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
find_last(
Range1T& Input,
const Range2T& Search)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::last_finder(Search));
}
//! Find last algorithm ( case insensitive )
/*!
Search for the last match a string in the input.
Searching is case insensitive.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\param Loc A locale used for case insensitive comparison
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
ifind_last(
Range1T& Input,
const Range2T& Search,
const std::locale& Loc=std::locale())
{
return ::boost::algorithm::find(Input, ::boost::algorithm::last_finder(Search, is_iequal(Loc)));
}
// find_nth ----------------------------------------------------------------------//
//! Find n-th algorithm
/*!
Search for the n-th (zero-indexed) occurrence of the substring in the
input.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\param Nth An index (zero-indexed) of the match to be found.
For negative N, the matches are counted from the end of string.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
find_nth(
Range1T& Input,
const Range2T& Search,
int Nth)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::nth_finder(Search,Nth));
}
//! Find n-th algorithm ( case insensitive ).
/*!
Search for the n-th (zero-indexed) occurrence of the substring in the
input. Searching is case insensitive.
\param Input A string which will be searched.
\param Search A substring to be searched for.
\param Nth An index (zero-indexed) of the match to be found.
For negative N, the matches are counted from the end of string.
\param Loc A locale used for case insensitive comparison
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename Range1T, typename Range2T>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<Range1T>::type>
ifind_nth(
Range1T& Input,
const Range2T& Search,
int Nth,
const std::locale& Loc=std::locale())
{
return ::boost::algorithm::find(Input, ::boost::algorithm::nth_finder(Search,Nth,is_iequal(Loc)));
}
// find_head ----------------------------------------------------------------------//
//! Find head algorithm
/*!
Get the head of the input. Head is a prefix of the string of the
given size. If the input is shorter then required, whole input if considered
to be the head.
\param Input An input string
\param N Length of the head
For N>=0, at most N characters are extracted.
For N<0, size(Input)-|N| characters are extracted.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c Range1T::iterator or
\c Range1T::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename RangeT>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
find_head(
RangeT& Input,
int N)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::head_finder(N));
}
// find_tail ----------------------------------------------------------------------//
//! Find tail algorithm
/*!
Get the tail of the input. Tail is a suffix of the string of the
given size. If the input is shorter then required, whole input if considered
to be the tail.
\param Input An input string
\param N Length of the tail.
For N>=0, at most N characters are extracted.
For N<0, size(Input)-|N| characters are extracted.
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c RangeT::iterator or
\c RangeT::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename RangeT>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
find_tail(
RangeT& Input,
int N)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::tail_finder(N));
}
// find_token --------------------------------------------------------------------//
//! Find token algorithm
/*!
Look for a given token in the string. Token is a character that matches the
given predicate.
If the "token compress mode" is enabled, adjacent tokens are considered to be one match.
\param Input A input string.
\param Pred An unary predicate to identify a token
\param eCompress Enable/Disable compressing of adjacent tokens
\return
An \c iterator_range delimiting the match.
Returned iterator is either \c RangeT::iterator or
\c RangeT::const_iterator, depending on the constness of
the input parameter.
\note This function provides the strong exception-safety guarantee
*/
template<typename RangeT, typename PredicateT>
inline iterator_range<
BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
find_token(
RangeT& Input,
PredicateT Pred,
token_compress_mode_type eCompress=token_compress_off)
{
return ::boost::algorithm::find(Input, ::boost::algorithm::token_finder(Pred, eCompress));
}
} // namespace algorithm
// pull names to the boost namespace
using algorithm::find;
using algorithm::find_first;
using algorithm::ifind_first;
using algorithm::find_last;
using algorithm::ifind_last;
using algorithm::find_nth;
using algorithm::ifind_nth;
using algorithm::find_head;
using algorithm::find_tail;
using algorithm::find_token;
} // namespace boost
#endif // BOOST_STRING_FIND_HPP
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