475 lines
15 KiB
C++
475 lines
15 KiB
C++
/*
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*
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* Copyright (c) 2004
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* John Maddock
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*
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* Use, modification and distribution are subject to the
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* Boost Software License, Version 1.0. (See accompanying file
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* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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/*
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* LOCATION: see http://www.boost.org for most recent version.
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* FILE c_regex_traits.hpp
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* VERSION see <boost/version.hpp>
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* DESCRIPTION: Declares regular expression traits class that wraps the global C locale.
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*/
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#ifndef BOOST_C_REGEX_TRAITS_HPP_INCLUDED
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#define BOOST_C_REGEX_TRAITS_HPP_INCLUDED
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#include <boost/regex/config.hpp>
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#include <boost/regex/v5/regex_workaround.hpp>
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#include <cctype>
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namespace boost{
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namespace BOOST_REGEX_DETAIL_NS {
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enum
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{
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char_class_space = 1 << 0,
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char_class_print = 1 << 1,
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char_class_cntrl = 1 << 2,
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char_class_upper = 1 << 3,
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char_class_lower = 1 << 4,
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char_class_alpha = 1 << 5,
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char_class_digit = 1 << 6,
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char_class_punct = 1 << 7,
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char_class_xdigit = 1 << 8,
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char_class_alnum = char_class_alpha | char_class_digit,
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char_class_graph = char_class_alnum | char_class_punct,
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char_class_blank = 1 << 9,
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char_class_word = 1 << 10,
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char_class_unicode = 1 << 11,
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char_class_horizontal = 1 << 12,
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char_class_vertical = 1 << 13
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};
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}
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template <class charT>
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struct c_regex_traits;
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template<>
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struct c_regex_traits<char>
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{
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c_regex_traits(){}
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typedef char char_type;
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typedef std::size_t size_type;
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typedef std::string string_type;
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struct locale_type{};
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typedef std::uint32_t char_class_type;
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static size_type length(const char_type* p)
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{
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return (std::strlen)(p);
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}
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char translate(char c) const
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{
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return c;
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}
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char translate_nocase(char c) const
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{
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return static_cast<char>((std::tolower)(static_cast<unsigned char>(c)));
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}
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static string_type transform(const char* p1, const char* p2);
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static string_type transform_primary(const char* p1, const char* p2);
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static char_class_type lookup_classname(const char* p1, const char* p2);
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static string_type lookup_collatename(const char* p1, const char* p2);
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static bool isctype(char, char_class_type);
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static int value(char, int);
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locale_type imbue(locale_type l)
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{ return l; }
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locale_type getloc()const
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{ return locale_type(); }
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private:
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// this type is not copyable:
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c_regex_traits(const c_regex_traits&);
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c_regex_traits& operator=(const c_regex_traits&);
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};
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#ifndef BOOST_NO_WREGEX
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template<>
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struct c_regex_traits<wchar_t>
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{
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c_regex_traits(){}
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typedef wchar_t char_type;
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typedef std::size_t size_type;
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typedef std::wstring string_type;
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struct locale_type{};
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typedef std::uint32_t char_class_type;
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static size_type length(const char_type* p)
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{
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return (std::wcslen)(p);
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}
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wchar_t translate(wchar_t c) const
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{
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return c;
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}
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wchar_t translate_nocase(wchar_t c) const
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{
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return (std::towlower)(c);
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}
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static string_type transform(const wchar_t* p1, const wchar_t* p2);
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static string_type transform_primary(const wchar_t* p1, const wchar_t* p2);
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static char_class_type lookup_classname(const wchar_t* p1, const wchar_t* p2);
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static string_type lookup_collatename(const wchar_t* p1, const wchar_t* p2);
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static bool isctype(wchar_t, char_class_type);
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static int value(wchar_t, int);
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locale_type imbue(locale_type l)
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{ return l; }
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locale_type getloc()const
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{ return locale_type(); }
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private:
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// this type is not copyable:
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c_regex_traits(const c_regex_traits&);
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c_regex_traits& operator=(const c_regex_traits&);
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};
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#endif // BOOST_NO_WREGEX
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inline c_regex_traits<char>::string_type c_regex_traits<char>::transform(const char* p1, const char* p2)
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{
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std::string result(10, ' ');
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std::size_t s = result.size();
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std::size_t r;
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std::string src(p1, p2);
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while (s < (r = std::strxfrm(&*result.begin(), src.c_str(), s)))
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{
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#if defined(_CPPLIB_VER)
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//
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// A bug in VC11 and 12 causes the program to hang if we pass a null-string
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// to std::strxfrm, but only for certain locales :-(
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// Probably effects Intel and Clang or any compiler using the VC std library (Dinkumware).
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//
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if (r == INT_MAX)
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{
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result.erase();
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result.insert(result.begin(), static_cast<char>(0));
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return result;
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}
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#endif
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result.append(r - s + 3, ' ');
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s = result.size();
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}
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result.erase(r);
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return result;
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}
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inline c_regex_traits<char>::string_type c_regex_traits<char>::transform_primary(const char* p1, const char* p2)
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{
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static char s_delim;
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static const int s_collate_type = ::boost::BOOST_REGEX_DETAIL_NS::find_sort_syntax(static_cast<c_regex_traits<char>*>(0), &s_delim);
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std::string result;
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//
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// What we do here depends upon the format of the sort key returned by
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// sort key returned by this->transform:
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//
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switch (s_collate_type)
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{
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_C:
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_unknown:
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// the best we can do is translate to lower case, then get a regular sort key:
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{
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result.assign(p1, p2);
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for (std::string::size_type i = 0; i < result.size(); ++i)
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result[i] = static_cast<char>((std::tolower)(static_cast<unsigned char>(result[i])));
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result = transform(&*result.begin(), &*result.begin() + result.size());
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break;
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}
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_fixed:
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{
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// get a regular sort key, and then truncate it:
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result = transform(p1, p2);
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result.erase(s_delim);
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break;
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}
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_delim:
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// get a regular sort key, and then truncate everything after the delim:
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result = transform(p1, p2);
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if ((!result.empty()) && (result[0] == s_delim))
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break;
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std::size_t i;
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for (i = 0; i < result.size(); ++i)
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{
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if (result[i] == s_delim)
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break;
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}
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result.erase(i);
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break;
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}
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if (result.empty())
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result = std::string(1, char(0));
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return result;
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}
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inline c_regex_traits<char>::char_class_type c_regex_traits<char>::lookup_classname(const char* p1, const char* p2)
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{
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using namespace BOOST_REGEX_DETAIL_NS;
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static const char_class_type masks[] =
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{
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0,
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char_class_alnum,
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char_class_alpha,
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char_class_blank,
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char_class_cntrl,
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char_class_digit,
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char_class_digit,
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char_class_graph,
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char_class_horizontal,
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char_class_lower,
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char_class_lower,
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char_class_print,
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char_class_punct,
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char_class_space,
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char_class_space,
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char_class_upper,
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char_class_unicode,
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char_class_upper,
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char_class_vertical,
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char_class_alnum | char_class_word,
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char_class_alnum | char_class_word,
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char_class_xdigit,
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};
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int idx = ::boost::BOOST_REGEX_DETAIL_NS::get_default_class_id(p1, p2);
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if (idx < 0)
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{
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std::string s(p1, p2);
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for (std::string::size_type i = 0; i < s.size(); ++i)
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s[i] = static_cast<char>((std::tolower)(static_cast<unsigned char>(s[i])));
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idx = ::boost::BOOST_REGEX_DETAIL_NS::get_default_class_id(&*s.begin(), &*s.begin() + s.size());
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}
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BOOST_REGEX_ASSERT(std::size_t(idx) + 1u < sizeof(masks) / sizeof(masks[0]));
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return masks[idx + 1];
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}
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inline bool c_regex_traits<char>::isctype(char c, char_class_type mask)
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{
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using namespace BOOST_REGEX_DETAIL_NS;
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return
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((mask & char_class_space) && (std::isspace)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_print) && (std::isprint)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_cntrl) && (std::iscntrl)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_upper) && (std::isupper)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_lower) && (std::islower)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_alpha) && (std::isalpha)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_digit) && (std::isdigit)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_punct) && (std::ispunct)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_xdigit) && (std::isxdigit)(static_cast<unsigned char>(c)))
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|| ((mask & char_class_blank) && (std::isspace)(static_cast<unsigned char>(c)) && !::boost::BOOST_REGEX_DETAIL_NS::is_separator(c))
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|| ((mask & char_class_word) && (c == '_'))
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|| ((mask & char_class_vertical) && (::boost::BOOST_REGEX_DETAIL_NS::is_separator(c) || (c == '\v')))
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|| ((mask & char_class_horizontal) && (std::isspace)(static_cast<unsigned char>(c)) && !::boost::BOOST_REGEX_DETAIL_NS::is_separator(c) && (c != '\v'));
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}
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inline c_regex_traits<char>::string_type c_regex_traits<char>::lookup_collatename(const char* p1, const char* p2)
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{
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std::string s(p1, p2);
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s = ::boost::BOOST_REGEX_DETAIL_NS::lookup_default_collate_name(s);
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if (s.empty() && (p2 - p1 == 1))
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s.append(1, *p1);
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return s;
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}
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inline int c_regex_traits<char>::value(char c, int radix)
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{
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char b[2] = { c, '\0', };
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char* ep;
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int result = std::strtol(b, &ep, radix);
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if (ep == b)
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return -1;
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return result;
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}
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#ifndef BOOST_NO_WREGEX
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inline c_regex_traits<wchar_t>::string_type c_regex_traits<wchar_t>::transform(const wchar_t* p1, const wchar_t* p2)
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{
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std::size_t r;
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std::size_t s = 10;
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std::wstring src(p1, p2);
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std::wstring result(s, L' ');
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while (s < (r = std::wcsxfrm(&*result.begin(), src.c_str(), s)))
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{
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#if defined(_CPPLIB_VER)
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//
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// A bug in VC11 and 12 causes the program to hang if we pass a null-string
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// to std::strxfrm, but only for certain locales :-(
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// Probably effects Intel and Clang or any compiler using the VC std library (Dinkumware).
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//
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if (r == INT_MAX)
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{
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result.erase();
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result.insert(result.begin(), static_cast<wchar_t>(0));
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return result;
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}
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#endif
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result.append(r - s + 3, L' ');
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s = result.size();
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}
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result.erase(r);
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return result;
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}
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inline c_regex_traits<wchar_t>::string_type c_regex_traits<wchar_t>::transform_primary(const wchar_t* p1, const wchar_t* p2)
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{
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static wchar_t s_delim;
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static const int s_collate_type = ::boost::BOOST_REGEX_DETAIL_NS::find_sort_syntax(static_cast<const c_regex_traits<wchar_t>*>(0), &s_delim);
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std::wstring result;
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//
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// What we do here depends upon the format of the sort key returned by
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// sort key returned by this->transform:
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//
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switch (s_collate_type)
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{
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_C:
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_unknown:
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// the best we can do is translate to lower case, then get a regular sort key:
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{
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result.assign(p1, p2);
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for (std::wstring::size_type i = 0; i < result.size(); ++i)
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result[i] = (std::towlower)(result[i]);
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result = c_regex_traits<wchar_t>::transform(&*result.begin(), &*result.begin() + result.size());
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break;
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}
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_fixed:
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{
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// get a regular sort key, and then truncate it:
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result = c_regex_traits<wchar_t>::transform(&*result.begin(), &*result.begin() + result.size());
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result.erase(s_delim);
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break;
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}
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case ::boost::BOOST_REGEX_DETAIL_NS::sort_delim:
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// get a regular sort key, and then truncate everything after the delim:
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result = c_regex_traits<wchar_t>::transform(&*result.begin(), &*result.begin() + result.size());
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if ((!result.empty()) && (result[0] == s_delim))
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break;
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std::size_t i;
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for (i = 0; i < result.size(); ++i)
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{
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if (result[i] == s_delim)
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break;
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}
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result.erase(i);
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break;
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}
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if (result.empty())
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result = std::wstring(1, char(0));
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return result;
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}
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inline c_regex_traits<wchar_t>::char_class_type c_regex_traits<wchar_t>::lookup_classname(const wchar_t* p1, const wchar_t* p2)
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{
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using namespace BOOST_REGEX_DETAIL_NS;
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static const char_class_type masks[] =
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{
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0,
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char_class_alnum,
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char_class_alpha,
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char_class_blank,
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char_class_cntrl,
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char_class_digit,
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char_class_digit,
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char_class_graph,
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char_class_horizontal,
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char_class_lower,
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char_class_lower,
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char_class_print,
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char_class_punct,
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char_class_space,
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char_class_space,
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char_class_upper,
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char_class_unicode,
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char_class_upper,
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char_class_vertical,
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char_class_alnum | char_class_word,
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char_class_alnum | char_class_word,
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char_class_xdigit,
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};
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int idx = ::boost::BOOST_REGEX_DETAIL_NS::get_default_class_id(p1, p2);
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if (idx < 0)
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{
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std::wstring s(p1, p2);
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for (std::wstring::size_type i = 0; i < s.size(); ++i)
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s[i] = (std::towlower)(s[i]);
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idx = ::boost::BOOST_REGEX_DETAIL_NS::get_default_class_id(&*s.begin(), &*s.begin() + s.size());
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}
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BOOST_REGEX_ASSERT(idx + 1 < static_cast<int>(sizeof(masks) / sizeof(masks[0])));
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return masks[idx + 1];
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}
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inline bool c_regex_traits<wchar_t>::isctype(wchar_t c, char_class_type mask)
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{
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using namespace BOOST_REGEX_DETAIL_NS;
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return
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((mask & char_class_space) && (std::iswspace)(c))
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|| ((mask & char_class_print) && (std::iswprint)(c))
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|| ((mask & char_class_cntrl) && (std::iswcntrl)(c))
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|| ((mask & char_class_upper) && (std::iswupper)(c))
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|| ((mask & char_class_lower) && (std::iswlower)(c))
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|| ((mask & char_class_alpha) && (std::iswalpha)(c))
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|| ((mask & char_class_digit) && (std::iswdigit)(c))
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|| ((mask & char_class_punct) && (std::iswpunct)(c))
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|| ((mask & char_class_xdigit) && (std::iswxdigit)(c))
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|| ((mask & char_class_blank) && (std::iswspace)(c) && !::boost::BOOST_REGEX_DETAIL_NS::is_separator(c))
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|| ((mask & char_class_word) && (c == '_'))
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|| ((mask & char_class_unicode) && (c & ~static_cast<wchar_t>(0xff)))
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|| ((mask & char_class_vertical) && (::boost::BOOST_REGEX_DETAIL_NS::is_separator(c) || (c == L'\v')))
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|| ((mask & char_class_horizontal) && (std::iswspace)(c) && !::boost::BOOST_REGEX_DETAIL_NS::is_separator(c) && (c != L'\v'));
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}
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inline c_regex_traits<wchar_t>::string_type c_regex_traits<wchar_t>::lookup_collatename(const wchar_t* p1, const wchar_t* p2)
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{
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std::string name;
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// Usual msvc warning suppression does not work here with std::string template constructor.... use a workaround instead:
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for (const wchar_t* pos = p1; pos != p2; ++pos)
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name.push_back((char)*pos);
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name = ::boost::BOOST_REGEX_DETAIL_NS::lookup_default_collate_name(name);
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if (!name.empty())
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return string_type(name.begin(), name.end());
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if (p2 - p1 == 1)
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return string_type(1, *p1);
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return string_type();
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}
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inline int c_regex_traits<wchar_t>::value(wchar_t c, int radix)
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{
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#ifdef BOOST_BORLANDC
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// workaround for broken wcstol:
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if ((std::iswxdigit)(c) == 0)
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return -1;
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#endif
|
|
wchar_t b[2] = { c, '\0', };
|
|
wchar_t* ep;
|
|
int result = std::wcstol(b, &ep, radix);
|
|
if (ep == b)
|
|
return -1;
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|