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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // string_matcher.hpp | |
3 | // | |
4 | // Copyright 2008 Eric Niebler. Distributed under the Boost | |
5 | // Software License, Version 1.0. (See accompanying file | |
6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | #ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_STRING_MATCHER_HPP_EAN_10_04_2005 | |
9 | #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_STRING_MATCHER_HPP_EAN_10_04_2005 | |
10 | ||
11 | // MS compatible compilers support #pragma once | |
12 | #if defined(_MSC_VER) | |
13 | # pragma once | |
14 | #endif | |
15 | ||
16 | #include <string> | |
17 | #include <boost/mpl/bool.hpp> | |
18 | #include <boost/xpressive/detail/detail_fwd.hpp> | |
19 | #include <boost/xpressive/detail/core/quant_style.hpp> | |
20 | #include <boost/xpressive/detail/core/state.hpp> | |
21 | #include <boost/xpressive/detail/utility/algorithm.hpp> | |
22 | #include <boost/xpressive/detail/utility/traits_utils.hpp> | |
23 | ||
24 | namespace boost { namespace xpressive { namespace detail | |
25 | { | |
26 | /////////////////////////////////////////////////////////////////////////////// | |
27 | // string_matcher | |
28 | // | |
29 | template<typename Traits, typename ICase> | |
30 | struct string_matcher | |
31 | : quant_style_fixed_unknown_width | |
32 | { | |
33 | typedef typename Traits::char_type char_type; | |
34 | typedef typename Traits::string_type string_type; | |
35 | typedef ICase icase_type; | |
36 | string_type str_; | |
37 | char_type const *end_; | |
38 | ||
39 | string_matcher(string_type const &str, Traits const &tr) | |
40 | : str_(str) | |
41 | , end_() | |
42 | { | |
43 | typename range_iterator<string_type>::type cur = boost::begin(this->str_); | |
44 | typename range_iterator<string_type>::type end = boost::end(this->str_); | |
45 | for(; cur != end; ++cur) | |
46 | { | |
47 | *cur = detail::translate(*cur, tr, icase_type()); | |
48 | } | |
49 | this->end_ = detail::data_end(str_); | |
50 | } | |
51 | ||
52 | string_matcher(string_matcher<Traits, ICase> const &that) | |
53 | : str_(that.str_) | |
54 | , end_(detail::data_end(str_)) | |
55 | { | |
56 | } | |
57 | ||
58 | template<typename BidiIter, typename Next> | |
59 | bool match(match_state<BidiIter> &state, Next const &next) const | |
60 | { | |
61 | BidiIter const tmp = state.cur_; | |
62 | char_type const *begin = detail::data_begin(this->str_); | |
63 | for(; begin != this->end_; ++begin, ++state.cur_) | |
64 | { | |
65 | if(state.eos() || | |
66 | (detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type()) != *begin)) | |
67 | { | |
68 | state.cur_ = tmp; | |
69 | return false; | |
70 | } | |
71 | } | |
72 | ||
73 | if(next.match(state)) | |
74 | { | |
75 | return true; | |
76 | } | |
77 | ||
78 | state.cur_ = tmp; | |
79 | return false; | |
80 | } | |
81 | ||
82 | detail::width get_width() const | |
83 | { | |
84 | return boost::size(this->str_); | |
85 | } | |
86 | }; | |
87 | ||
88 | }}} | |
89 | ||
90 | #endif |