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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/regex/v4/perl_matcher.hpp
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+/*
+ *
+ * Copyright (c) 2002
+ * John Maddock
+ *
+ * Use, modification and distribution are subject to 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)
+ *
+ */
+
+#ifndef BOOST_REGEX_MATCHER_HPP
+#define BOOST_REGEX_MATCHER_HPP
+
+#include <boost/regex/v4/iterator_category.hpp>
+
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
+#ifdef BOOST_MSVC
+# pragma warning(push)
+# pragma warning(disable: 4800)
+#endif
+
+namespace boost{
+namespace re_detail{
+
+//
+// error checking API:
+//
+BOOST_REGEX_DECL void BOOST_REGEX_CALL verify_options(boost::regex_constants::syntax_option_type ef, match_flag_type mf);
+//
+// function can_start:
+//
+template <class charT>
+inline bool can_start(charT c, const unsigned char* map, unsigned char mask)
+{
+ return ((c < static_cast<charT>(0)) ? true : ((c >= static_cast<charT>(1 << CHAR_BIT)) ? true : map[c] & mask));
+}
+inline bool can_start(char c, const unsigned char* map, unsigned char mask)
+{
+ return map[(unsigned char)c] & mask;
+}
+inline bool can_start(signed char c, const unsigned char* map, unsigned char mask)
+{
+ return map[(unsigned char)c] & mask;
+}
+inline bool can_start(unsigned char c, const unsigned char* map, unsigned char mask)
+{
+ return map[c] & mask;
+}
+inline bool can_start(unsigned short c, const unsigned char* map, unsigned char mask)
+{
+ return ((c >= (1 << CHAR_BIT)) ? true : map[c] & mask);
+}
+#if !defined(__hpux) // WCHAR_MIN not usable in pp-directives.
+#if defined(WCHAR_MIN) && (WCHAR_MIN == 0) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+inline bool can_start(wchar_t c, const unsigned char* map, unsigned char mask)
+{
+ return ((c >= static_cast<wchar_t>(1u << CHAR_BIT)) ? true : map[c] & mask);
+}
+#endif
+#endif
+#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+inline bool can_start(unsigned int c, const unsigned char* map, unsigned char mask)
+{
+ return (((c >= static_cast<unsigned int>(1u << CHAR_BIT)) ? true : map[c] & mask));
+}
+#endif
+
+
+//
+// Unfortunately Rogue Waves standard library appears to have a bug
+// in std::basic_string::compare that results in eroneous answers
+// in some cases (tested with Borland C++ 5.1, Rogue Wave lib version
+// 0x020101) the test case was:
+// {39135,0} < {0xff,0}
+// which succeeds when it should not.
+//
+#ifndef _RWSTD_VER
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1310)
+template <class C, class T, class A>
+inline int string_compare(const std::basic_string<C,T,A>& s, const C* p)
+{
+ if(0 == *p)
+ {
+ if(s.empty() || ((s.size() == 1) && (s[0] == 0)))
+ return 0;
+ }
+ return s.compare(p);
+}
+#endif
+#else
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1310)
+template <class C, class T, class A>
+inline int string_compare(const std::basic_string<C,T,A>& s, const C* p)
+{
+ if(0 == *p)
+ {
+ if(s.empty() || ((s.size() == 1) && (s[0] == 0)))
+ return 0;
+ }
+ return s.compare(p);
+}
+#endif
+inline int string_compare(const std::string& s, const char* p)
+{ return std::strcmp(s.c_str(), p); }
+# ifndef BOOST_NO_WREGEX
+inline int string_compare(const std::wstring& s, const wchar_t* p)
+{ return std::wcscmp(s.c_str(), p); }
+#endif
+#endif
+template <class Seq, class C>
+inline int string_compare(const Seq& s, const C* p)
+{
+ std::size_t i = 0;
+ while((i < s.size()) && (p[i] == s[i]))
+ {
+ ++i;
+ }
+ return (i == s.size()) ? -p[i] : s[i] - p[i];
+}
+# define STR_COMP(s,p) string_compare(s,p)
+
+template<class charT>
+inline const charT* re_skip_past_null(const charT* p)
+{
+ while (*p != static_cast<charT>(0)) ++p;
+ return ++p;
+}
+
+template <class iterator, class charT, class traits_type, class char_classT>
+iterator BOOST_REGEX_CALL re_is_set_member(iterator next,
+ iterator last,
+ const re_set_long<char_classT>* set_,
+ const regex_data<charT, traits_type>& e, bool icase)
+{
+ const charT* p = reinterpret_cast<const charT*>(set_+1);
+ iterator ptr;
+ unsigned int i;
+ //bool icase = e.m_flags & regex_constants::icase;
+
+ if(next == last) return next;
+
+ typedef typename traits_type::string_type traits_string_type;
+ const ::boost::regex_traits_wrapper<traits_type>& traits_inst = *(e.m_ptraits);
+
+ // dwa 9/13/00 suppress incorrect MSVC warning - it claims this is never
+ // referenced
+ (void)traits_inst;
+
+ // try and match a single character, could be a multi-character
+ // collating element...
+ for(i = 0; i < set_->csingles; ++i)
+ {
+ ptr = next;
+ if(*p == static_cast<charT>(0))
+ {
+ // treat null string as special case:
+ if(traits_inst.translate(*ptr, icase) != *p)
+ {
+ while(*p == static_cast<charT>(0))++p;
+ continue;
+ }
+ return set_->isnot ? next : (ptr == next) ? ++next : ptr;
+ }
+ else
+ {
+ while(*p && (ptr != last))
+ {
+ if(traits_inst.translate(*ptr, icase) != *p)
+ break;
+ ++p;
+ ++ptr;
+ }
+
+ if(*p == static_cast<charT>(0)) // if null we've matched
+ return set_->isnot ? next : (ptr == next) ? ++next : ptr;
+
+ p = re_skip_past_null(p); // skip null
+ }
+ }
+
+ charT col = traits_inst.translate(*next, icase);
+
+
+ if(set_->cranges || set_->cequivalents)
+ {
+ traits_string_type s1;
+ //
+ // try and match a range, NB only a single character can match
+ if(set_->cranges)
+ {
+ if((e.m_flags & regex_constants::collate) == 0)
+ s1.assign(1, col);
+ else
+ {
+ charT a[2] = { col, charT(0), };
+ s1 = traits_inst.transform(a, a + 1);
+ }
+ for(i = 0; i < set_->cranges; ++i)
+ {
+ if(STR_COMP(s1, p) >= 0)
+ {
+ do{ ++p; }while(*p);
+ ++p;
+ if(STR_COMP(s1, p) <= 0)
+ return set_->isnot ? next : ++next;
+ }
+ else
+ {
+ // skip first string
+ do{ ++p; }while(*p);
+ ++p;
+ }
+ // skip second string
+ do{ ++p; }while(*p);
+ ++p;
+ }
+ }
+ //
+ // try and match an equivalence class, NB only a single character can match
+ if(set_->cequivalents)
+ {
+ charT a[2] = { col, charT(0), };
+ s1 = traits_inst.transform_primary(a, a +1);
+ for(i = 0; i < set_->cequivalents; ++i)
+ {
+ if(STR_COMP(s1, p) == 0)
+ return set_->isnot ? next : ++next;
+ // skip string
+ do{ ++p; }while(*p);
+ ++p;
+ }
+ }
+ }
+ if(traits_inst.isctype(col, set_->cclasses) == true)
+ return set_->isnot ? next : ++next;
+ if((set_->cnclasses != 0) && (traits_inst.isctype(col, set_->cnclasses) == false))
+ return set_->isnot ? next : ++next;
+ return set_->isnot ? ++next : next;
+}
+
+template <class BidiIterator>
+class repeater_count
+{
+ repeater_count** stack;
+ repeater_count* next;
+ int state_id;
+ std::size_t count; // the number of iterations so far
+ BidiIterator start_pos; // where the last repeat started
+public:
+ repeater_count(repeater_count** s)
+ {
+ stack = s;
+ next = 0;
+ state_id = -1;
+ count = 0;
+ }
+ repeater_count(int i, repeater_count** s, BidiIterator start)
+ : start_pos(start)
+ {
+ state_id = i;
+ stack = s;
+ next = *stack;
+ *stack = this;
+ if(state_id > next->state_id)
+ count = 0;
+ else
+ {
+ repeater_count* p = next;
+ while(p->state_id != state_id)
+ p = p->next;
+ count = p->count;
+ start_pos = p->start_pos;
+ }
+ }
+ ~repeater_count()
+ {
+ *stack = next;
+ }
+ std::size_t get_count() { return count; }
+ int get_id() { return state_id; }
+ std::size_t operator++() { return ++count; }
+ bool check_null_repeat(const BidiIterator& pos, std::size_t max)
+ {
+ // this is called when we are about to start a new repeat,
+ // if the last one was NULL move our count to max,
+ // otherwise save the current position.
+ bool result = (count == 0) ? false : (pos == start_pos);
+ if(result)
+ count = max;
+ else
+ start_pos = pos;
+ return result;
+ }
+};
+
+struct saved_state;
+
+enum saved_state_type
+{
+ saved_type_end = 0,
+ saved_type_paren = 1,
+ saved_type_recurse = 2,
+ saved_type_assertion = 3,
+ saved_state_alt = 4,
+ saved_state_repeater_count = 5,
+ saved_state_extra_block = 6,
+ saved_state_greedy_single_repeat = 7,
+ saved_state_rep_slow_dot = 8,
+ saved_state_rep_fast_dot = 9,
+ saved_state_rep_char = 10,
+ saved_state_rep_short_set = 11,
+ saved_state_rep_long_set = 12,
+ saved_state_non_greedy_long_repeat = 13,
+ saved_state_count = 14
+};
+
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable : 4251 4231 4660)
+#endif
+
+template <class BidiIterator, class Allocator, class traits>
+class perl_matcher
+{
+public:
+ typedef typename traits::char_type char_type;
+ typedef perl_matcher<BidiIterator, Allocator, traits> self_type;
+ typedef bool (self_type::*matcher_proc_type)(void);
+ typedef std::size_t traits_size_type;
+ typedef typename is_byte<char_type>::width_type width_type;
+ typedef typename regex_iterator_traits<BidiIterator>::difference_type difference_type;
+
+ perl_matcher(BidiIterator first, BidiIterator end,
+ match_results<BidiIterator, Allocator>& what,
+ const basic_regex<char_type, traits>& e,
+ match_flag_type f,
+ BidiIterator l_base)
+ : m_result(what), base(first), last(end),
+ position(first), backstop(l_base), re(e), traits_inst(e.get_traits()),
+ m_independent(false), next_count(&rep_obj), rep_obj(&next_count)
+ {
+ construct_init(e, f);
+ }
+
+ bool match();
+ bool find();
+
+ void setf(match_flag_type f)
+ { m_match_flags |= f; }
+ void unsetf(match_flag_type f)
+ { m_match_flags &= ~f; }
+
+private:
+ void construct_init(const basic_regex<char_type, traits>& e, match_flag_type f);
+
+ bool find_imp();
+ bool match_imp();
+#ifdef BOOST_REGEX_HAS_MS_STACK_GUARD
+ typedef bool (perl_matcher::*protected_proc_type)();
+ bool protected_call(protected_proc_type);
+#endif
+ void estimate_max_state_count(std::random_access_iterator_tag*);
+ void estimate_max_state_count(void*);
+ bool match_prefix();
+ bool match_all_states();
+
+ // match procs, stored in s_match_vtable:
+ bool match_startmark();
+ bool match_endmark();
+ bool match_literal();
+ bool match_start_line();
+ bool match_end_line();
+ bool match_wild();
+ bool match_match();
+ bool match_word_boundary();
+ bool match_within_word();
+ bool match_word_start();
+ bool match_word_end();
+ bool match_buffer_start();
+ bool match_buffer_end();
+ bool match_backref();
+ bool match_long_set();
+ bool match_set();
+ bool match_jump();
+ bool match_alt();
+ bool match_rep();
+ bool match_combining();
+ bool match_soft_buffer_end();
+ bool match_restart_continue();
+ bool match_long_set_repeat();
+ bool match_set_repeat();
+ bool match_char_repeat();
+ bool match_dot_repeat_fast();
+ bool match_dot_repeat_slow();
+ bool match_backstep();
+ bool match_assert_backref();
+ bool match_toggle_case();
+#ifdef BOOST_REGEX_RECURSIVE
+ bool backtrack_till_match(std::size_t count);
+#endif
+
+ // find procs stored in s_find_vtable:
+ bool find_restart_any();
+ bool find_restart_word();
+ bool find_restart_line();
+ bool find_restart_buf();
+ bool find_restart_lit();
+
+private:
+ // final result structure to be filled in:
+ match_results<BidiIterator, Allocator>& m_result;
+ // temporary result for POSIX matches:
+ scoped_ptr<match_results<BidiIterator, Allocator> > m_temp_match;
+ // pointer to actual result structure to fill in:
+ match_results<BidiIterator, Allocator>* m_presult;
+ // start of sequence being searched:
+ BidiIterator base;
+ // end of sequence being searched:
+ BidiIterator last;
+ // current character being examined:
+ BidiIterator position;
+ // where to restart next search after failed match attempt:
+ BidiIterator restart;
+ // where the current search started from, acts as base for $` during grep:
+ BidiIterator search_base;
+ // how far we can go back when matching lookbehind:
+ BidiIterator backstop;
+ // the expression being examined:
+ const basic_regex<char_type, traits>& re;
+ // the expression's traits class:
+ const ::boost::regex_traits_wrapper<traits>& traits_inst;
+ // the next state in the machine being matched:
+ const re_syntax_base* pstate;
+ // matching flags in use:
+ match_flag_type m_match_flags;
+ // how many states we have examined so far:
+ boost::uintmax_t state_count;
+ // max number of states to examine before giving up:
+ boost::uintmax_t max_state_count;
+ // whether we should ignore case or not:
+ bool icase;
+ // set to true when (position == last), indicates that we may have a partial match:
+ bool m_has_partial_match;
+ // set to true whenever we get a match:
+ bool m_has_found_match;
+ // set to true whenever we're inside an independent sub-expression:
+ bool m_independent;
+ // the current repeat being examined:
+ repeater_count<BidiIterator>* next_count;
+ // the first repeat being examined (top of linked list):
+ repeater_count<BidiIterator> rep_obj;
+ // the mask to pass when matching word boundaries:
+ typename traits::char_class_type m_word_mask;
+ // the bitmask to use when determining whether a match_any matches a newline or not:
+ unsigned char match_any_mask;
+
+#ifdef BOOST_REGEX_NON_RECURSIVE
+ //
+ // additional members for non-recursive version:
+ //
+ typedef bool (self_type::*unwind_proc_type)(bool);
+
+ void extend_stack();
+ bool unwind(bool);
+ bool unwind_end(bool);
+ bool unwind_paren(bool);
+ bool unwind_recursion_stopper(bool);
+ bool unwind_assertion(bool);
+ bool unwind_alt(bool);
+ bool unwind_repeater_counter(bool);
+ bool unwind_extra_block(bool);
+ bool unwind_greedy_single_repeat(bool);
+ bool unwind_slow_dot_repeat(bool);
+ bool unwind_fast_dot_repeat(bool);
+ bool unwind_char_repeat(bool);
+ bool unwind_short_set_repeat(bool);
+ bool unwind_long_set_repeat(bool);
+ bool unwind_non_greedy_repeat(bool);
+ void destroy_single_repeat();
+ void push_matched_paren(int index, const sub_match<BidiIterator>& sub);
+ void push_recursion_stopper();
+ void push_assertion(const re_syntax_base* ps, bool positive);
+ void push_alt(const re_syntax_base* ps);
+ void push_repeater_count(int i, repeater_count<BidiIterator>** s);
+ void push_single_repeat(std::size_t c, const re_repeat* r, BidiIterator last_position, int state_id);
+ void push_non_greedy_repeat(const re_syntax_base* ps);
+
+
+ // pointer to base of stack:
+ saved_state* m_stack_base;
+ // pointer to current stack position:
+ saved_state* m_backup_state;
+ // determines what value to return when unwinding from recursion,
+ // allows for mixed recursive/non-recursive algorithm:
+ bool m_recursive_result;
+ // how many memory blocks have we used up?:
+ unsigned used_block_count;
+#endif
+
+ // these operations aren't allowed, so are declared private,
+ // bodies are provided to keep explicit-instantiation requests happy:
+ perl_matcher& operator=(const perl_matcher&)
+ {
+ return *this;
+ }
+ perl_matcher(const perl_matcher& that)
+ : m_result(that.m_result), re(that.re), traits_inst(that.traits_inst), rep_obj(0) {}
+};
+
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
+} // namespace re_detail
+
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
+} // namespace boost
+
+#ifdef BOOST_MSVC
+# pragma warning(pop)
+#endif
+
+//
+// include the implementation of perl_matcher:
+//
+#ifdef BOOST_REGEX_RECURSIVE
+#include <boost/regex/v4/perl_matcher_recursive.hpp>
+#else
+#include <boost/regex/v4/perl_matcher_non_recursive.hpp>
+#endif
+// this one has to be last:
+#include <boost/regex/v4/perl_matcher_common.hpp>
+
+#endif
+