378 lines
11 KiB
Plaintext
378 lines
11 KiB
Plaintext
/*
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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 regex_traits_defaults.hpp
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* VERSION see <boost/version.hpp>
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* DESCRIPTION: Declares API's for access to regex_traits default properties.
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*/
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#ifndef BOOST_REGEX_TRAITS_DEFAULTS_HPP_INCLUDED
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#define BOOST_REGEX_TRAITS_DEFAULTS_HPP_INCLUDED
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#ifdef BOOST_MSVC
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#pragma warning(push)
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#pragma warning(disable: 4103)
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#endif
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_PREFIX
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#endif
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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#include <boost/regex/config.hpp>
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#ifndef BOOST_REGEX_SYNTAX_TYPE_HPP
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#include <boost/regex/v4/syntax_type.hpp>
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#endif
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#ifndef BOOST_REGEX_ERROR_TYPE_HPP
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#include <boost/regex/v4/error_type.hpp>
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#endif
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#include <boost/type_traits/make_unsigned.hpp>
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#ifdef BOOST_NO_STDC_NAMESPACE
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namespace std{
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using ::strlen;
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}
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#endif
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namespace boost{ namespace BOOST_REGEX_DETAIL_NS{
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//
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// helpers to suppress warnings:
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//
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template <class charT>
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inline bool is_extended(charT c)
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{
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typedef typename make_unsigned<charT>::type unsigned_type;
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return (sizeof(charT) > 1) && (static_cast<unsigned_type>(c) >= 256u);
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}
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inline bool is_extended(char)
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{ return false; }
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BOOST_REGEX_DECL const char* BOOST_REGEX_CALL get_default_syntax(regex_constants::syntax_type n);
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BOOST_REGEX_DECL const char* BOOST_REGEX_CALL get_default_error_string(regex_constants::error_type n);
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BOOST_REGEX_DECL regex_constants::syntax_type BOOST_REGEX_CALL get_default_syntax_type(char c);
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BOOST_REGEX_DECL regex_constants::escape_syntax_type BOOST_REGEX_CALL get_default_escape_syntax_type(char c);
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// is charT c a combining character?
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BOOST_REGEX_DECL bool BOOST_REGEX_CALL is_combining_implementation(uint_least16_t s);
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template <class charT>
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inline bool is_combining(charT c)
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{
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return (c <= static_cast<charT>(0)) ? false : ((c >= static_cast<charT>((std::numeric_limits<uint_least16_t>::max)())) ? false : is_combining_implementation(static_cast<unsigned short>(c)));
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}
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template <>
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inline bool is_combining<char>(char)
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{
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return false;
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}
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template <>
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inline bool is_combining<signed char>(signed char)
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{
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return false;
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}
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template <>
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inline bool is_combining<unsigned char>(unsigned char)
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{
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return false;
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}
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#if !defined(__hpux) && !defined(__WINSCW__) // can't use WCHAR_MAX/MIN in pp-directives
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#ifdef _MSC_VER
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template<>
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inline bool is_combining<wchar_t>(wchar_t c)
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{
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return is_combining_implementation(static_cast<unsigned short>(c));
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}
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#elif !defined(__DECCXX) && !defined(__osf__) && !defined(__OSF__) && defined(WCHAR_MIN) && (WCHAR_MIN == 0) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
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#if defined(WCHAR_MAX) && (WCHAR_MAX <= USHRT_MAX)
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template<>
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inline bool is_combining<wchar_t>(wchar_t c)
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{
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return is_combining_implementation(static_cast<unsigned short>(c));
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}
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#else
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template<>
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inline bool is_combining<wchar_t>(wchar_t c)
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{
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return (c >= (std::numeric_limits<uint_least16_t>::max)()) ? false : is_combining_implementation(static_cast<unsigned short>(c));
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}
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#endif
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#endif
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#endif
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//
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// is a charT c a line separator?
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//
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template <class charT>
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inline bool is_separator(charT c)
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{
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return BOOST_REGEX_MAKE_BOOL(
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(c == static_cast<charT>('\n'))
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|| (c == static_cast<charT>('\r'))
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|| (c == static_cast<charT>('\f'))
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|| (static_cast<boost::uint16_t>(c) == 0x2028u)
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|| (static_cast<boost::uint16_t>(c) == 0x2029u)
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|| (static_cast<boost::uint16_t>(c) == 0x85u));
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}
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template <>
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inline bool is_separator<char>(char c)
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{
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return BOOST_REGEX_MAKE_BOOL((c == '\n') || (c == '\r') || (c == '\f'));
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}
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//
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// get a default collating element:
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//
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BOOST_REGEX_DECL std::string BOOST_REGEX_CALL lookup_default_collate_name(const std::string& name);
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//
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// get the state_id of a character clasification, the individual
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// traits classes then transform that state_id into a bitmask:
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//
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template <class charT>
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struct character_pointer_range
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{
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const charT* p1;
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const charT* p2;
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bool operator < (const character_pointer_range& r)const
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{
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return std::lexicographical_compare(p1, p2, r.p1, r.p2);
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}
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bool operator == (const character_pointer_range& r)const
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{
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// Not only do we check that the ranges are of equal size before
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// calling std::equal, but there is no other algorithm available:
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// not even a non-standard MS one. So forward to unchecked_equal
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// in the MS case.
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return ((p2 - p1) == (r.p2 - r.p1)) && BOOST_REGEX_DETAIL_NS::equal(p1, p2, r.p1);
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}
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};
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template <class charT>
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int get_default_class_id(const charT* p1, const charT* p2)
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{
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static const charT data[73] = {
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'a', 'l', 'n', 'u', 'm',
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'a', 'l', 'p', 'h', 'a',
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'b', 'l', 'a', 'n', 'k',
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'c', 'n', 't', 'r', 'l',
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'd', 'i', 'g', 'i', 't',
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'g', 'r', 'a', 'p', 'h',
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'l', 'o', 'w', 'e', 'r',
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'p', 'r', 'i', 'n', 't',
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'p', 'u', 'n', 'c', 't',
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's', 'p', 'a', 'c', 'e',
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'u', 'n', 'i', 'c', 'o', 'd', 'e',
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'u', 'p', 'p', 'e', 'r',
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'v',
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'w', 'o', 'r', 'd',
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'x', 'd', 'i', 'g', 'i', 't',
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};
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static const character_pointer_range<charT> ranges[21] =
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{
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{data+0, data+5,}, // alnum
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{data+5, data+10,}, // alpha
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{data+10, data+15,}, // blank
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{data+15, data+20,}, // cntrl
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{data+20, data+21,}, // d
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{data+20, data+25,}, // digit
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{data+25, data+30,}, // graph
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{data+29, data+30,}, // h
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{data+30, data+31,}, // l
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{data+30, data+35,}, // lower
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{data+35, data+40,}, // print
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{data+40, data+45,}, // punct
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{data+45, data+46,}, // s
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{data+45, data+50,}, // space
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{data+57, data+58,}, // u
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{data+50, data+57,}, // unicode
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{data+57, data+62,}, // upper
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{data+62, data+63,}, // v
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{data+63, data+64,}, // w
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{data+63, data+67,}, // word
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{data+67, data+73,}, // xdigit
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};
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static const character_pointer_range<charT>* ranges_begin = ranges;
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static const character_pointer_range<charT>* ranges_end = ranges + (sizeof(ranges)/sizeof(ranges[0]));
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character_pointer_range<charT> t = { p1, p2, };
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const character_pointer_range<charT>* p = std::lower_bound(ranges_begin, ranges_end, t);
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if((p != ranges_end) && (t == *p))
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return static_cast<int>(p - ranges);
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return -1;
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}
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//
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// helper functions:
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//
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template <class charT>
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std::ptrdiff_t global_length(const charT* p)
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{
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std::ptrdiff_t n = 0;
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while(*p)
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{
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++p;
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++n;
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}
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return n;
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}
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template<>
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inline std::ptrdiff_t global_length<char>(const char* p)
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{
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return (std::strlen)(p);
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}
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#ifndef BOOST_NO_WREGEX
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template<>
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inline std::ptrdiff_t global_length<wchar_t>(const wchar_t* p)
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{
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return (std::wcslen)(p);
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}
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#endif
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template <class charT>
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inline charT BOOST_REGEX_CALL global_lower(charT c)
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{
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return c;
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}
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template <class charT>
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inline charT BOOST_REGEX_CALL global_upper(charT c)
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{
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return c;
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}
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BOOST_REGEX_DECL char BOOST_REGEX_CALL do_global_lower(char c);
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BOOST_REGEX_DECL char BOOST_REGEX_CALL do_global_upper(char c);
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#ifndef BOOST_NO_WREGEX
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BOOST_REGEX_DECL wchar_t BOOST_REGEX_CALL do_global_lower(wchar_t c);
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BOOST_REGEX_DECL wchar_t BOOST_REGEX_CALL do_global_upper(wchar_t c);
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#endif
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#ifdef BOOST_REGEX_HAS_OTHER_WCHAR_T
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BOOST_REGEX_DECL unsigned short BOOST_REGEX_CALL do_global_lower(unsigned short c);
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BOOST_REGEX_DECL unsigned short BOOST_REGEX_CALL do_global_upper(unsigned short c);
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#endif
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//
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// This sucks: declare template specialisations of global_lower/global_upper
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// that just forward to the non-template implementation functions. We do
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// this because there is one compiler (Compaq Tru64 C++) that doesn't seem
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// to differentiate between templates and non-template overloads....
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// what's more, the primary template, plus all overloads have to be
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// defined in the same translation unit (if one is inline they all must be)
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// otherwise the "local template instantiation" compiler option can pick
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// the wrong instantiation when linking:
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//
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template<> inline char BOOST_REGEX_CALL global_lower<char>(char c){ return do_global_lower(c); }
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template<> inline char BOOST_REGEX_CALL global_upper<char>(char c){ return do_global_upper(c); }
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#ifndef BOOST_NO_WREGEX
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template<> inline wchar_t BOOST_REGEX_CALL global_lower<wchar_t>(wchar_t c){ return do_global_lower(c); }
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template<> inline wchar_t BOOST_REGEX_CALL global_upper<wchar_t>(wchar_t c){ return do_global_upper(c); }
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#endif
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#ifdef BOOST_REGEX_HAS_OTHER_WCHAR_T
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template<> inline unsigned short BOOST_REGEX_CALL global_lower<unsigned short>(unsigned short c){ return do_global_lower(c); }
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template<> inline unsigned short BOOST_REGEX_CALL global_upper<unsigned short>(unsigned short c){ return do_global_upper(c); }
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#endif
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template <class charT>
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int global_value(charT c)
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{
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static const charT zero = '0';
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static const charT nine = '9';
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static const charT a = 'a';
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static const charT f = 'f';
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static const charT A = 'A';
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static const charT F = 'F';
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if(c > f) return -1;
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if(c >= a) return 10 + (c - a);
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if(c > F) return -1;
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if(c >= A) return 10 + (c - A);
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if(c > nine) return -1;
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if(c >= zero) return c - zero;
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return -1;
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}
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template <class charT, class traits>
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boost::intmax_t global_toi(const charT*& p1, const charT* p2, int radix, const traits& t)
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{
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(void)t; // warning suppression
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boost::intmax_t next_value = t.value(*p1, radix);
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if((p1 == p2) || (next_value < 0) || (next_value >= radix))
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return -1;
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boost::intmax_t result = 0;
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while(p1 != p2)
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{
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next_value = t.value(*p1, radix);
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if((next_value < 0) || (next_value >= radix))
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break;
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result *= radix;
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result += next_value;
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++p1;
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}
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return result;
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}
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template <class charT>
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inline const charT* get_escape_R_string()
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{
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#ifdef BOOST_MSVC
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# pragma warning(push)
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# pragma warning(disable:4309 4245)
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#endif
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static const charT e1[] = { '(', '?', '>', '\x0D', '\x0A', '?',
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'|', '[', '\x0A', '\x0B', '\x0C', static_cast<unsigned char>('\x85'), '\\', 'x', '{', '2', '0', '2', '8', '}',
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'\\', 'x', '{', '2', '0', '2', '9', '}', ']', ')', '\0' };
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static const charT e2[] = { '(', '?', '>', '\x0D', '\x0A', '?',
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'|', '[', '\x0A', '\x0B', '\x0C', static_cast<unsigned char>('\x85'), ']', ')', '\0' };
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charT c = static_cast<charT>(0x2029u);
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bool b = (static_cast<unsigned>(c) == 0x2029u);
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return (b ? e1 : e2);
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#ifdef BOOST_MSVC
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# pragma warning(pop)
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#endif
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}
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template <>
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inline const char* get_escape_R_string<char>()
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{
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#ifdef BOOST_MSVC
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# pragma warning(push)
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# pragma warning(disable:4309)
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#endif
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static const char e2[] = { '(', '?', '>', '\x0D', '\x0A', '?',
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'|', '[', '\x0A', '\x0B', '\x0C', '\x85', ']', ')', '\0' };
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return e2;
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#ifdef BOOST_MSVC
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# pragma warning(pop)
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#endif
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}
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} // BOOST_REGEX_DETAIL_NS
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} // boost
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#ifdef BOOST_MSVC
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#pragma warning(push)
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#pragma warning(disable: 4103)
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#endif
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_SUFFIX
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#endif
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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#endif
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