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/*
*
* Copyright (c) 1998-2004
* 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)
*
*/
/*
* LOCATION: see http://www.boost.org for most recent version.
* FILE: regex.cpp
* VERSION: see <boost/version.hpp>
* DESCRIPTION: Misc boost::regbase member funnctions.
*/
#define BOOST_REGEX_SOURCE
#include <boost/config.hpp>
#include <new>
#include <boost/regex.hpp>
#include <boost/throw_exception.hpp>
#if defined(BOOST_REGEX_HAS_MS_STACK_GUARD) && defined(_MSC_VER) && (_MSC_VER >= 1300)
# include <malloc.h>
#endif
#ifdef BOOST_REGEX_HAS_MS_STACK_GUARD
#define WIN32_LEAN_AND_MEAN
#ifndef NOMINMAX
# define NOMINMAX
#endif
#define NOGDI
#define NOUSER
#include <windows.h>
#endif
#if defined(BOOST_REGEX_NON_RECURSIVE) && !defined(BOOST_REGEX_V3)
#if BOOST_REGEX_MAX_CACHE_BLOCKS == 0
#include <new>
#else
#include <boost/regex/v4/mem_block_cache.hpp>
#endif
#endif
#ifdef BOOST_INTEL
#pragma warning(disable:383)
#endif
namespace boost{
//
// fix: these are declared out of line here to ensure
// that dll builds contain the Virtual table for these
// types - this ensures that exceptions can be thrown
// from the dll and caught in an exe.
regex_error::regex_error(const std::string& s, regex_constants::error_type err, std::ptrdiff_t pos)
: std::runtime_error(s)
, m_error_code(err)
, m_position(pos)
{
}
regex_error::regex_error(regex_constants::error_type err)
: std::runtime_error(::boost::BOOST_REGEX_DETAIL_NS::get_default_error_string(err))
, m_error_code(err)
, m_position(0)
{
}
regex_error::~regex_error() throw()
{
}
void regex_error::raise()const
{
#ifndef BOOST_NO_EXCEPTIONS
::boost::throw_exception(*this);
#endif
}
namespace BOOST_REGEX_DETAIL_NS{
BOOST_REGEX_DECL void BOOST_REGEX_CALL raise_runtime_error(const std::runtime_error& ex)
{
::boost::throw_exception(ex);
}
//
// error checking API:
//
BOOST_REGEX_DECL void BOOST_REGEX_CALL verify_options(boost::regex::flag_type /*ef*/, match_flag_type mf)
{
#ifndef BOOST_REGEX_V3
//
// can't mix match_extra with POSIX matching rules:
//
if((mf & match_extra) && (mf & match_posix))
{
std::logic_error msg("Usage Error: Can't mix regular expression captures with POSIX matching rules");
throw_exception(msg);
}
#endif
}
#ifdef BOOST_REGEX_HAS_MS_STACK_GUARD
static void execute_eror()
{
// we only get here after a stack overflow,
// this has to be a separate proceedure because we
// can't mix __try{}__except block with local objects
// that have destructors:
reset_stack_guard_page();
std::runtime_error err("Out of stack space, while attempting to match a regular expression.");
raise_runtime_error(err);
}
bool BOOST_REGEX_CALL abstract_protected_call::execute()const
{
__try{
return this->call();
}__except(EXCEPTION_STACK_OVERFLOW == GetExceptionCode())
{
execute_eror();
}
// We never really get here at all:
return false;
}
BOOST_REGEX_DECL void BOOST_REGEX_CALL reset_stack_guard_page()
{
#if defined(BOOST_REGEX_HAS_MS_STACK_GUARD) && defined(_MSC_VER) && (_MSC_VER >= 1300)
_resetstkoflw();
#else
//
// We need to locate the current page being used by the stack,
// move to the page below it and then deallocate and protect
// that page. Note that ideally we would protect only the lowest
// stack page that has been allocated: in practice there
// seems to be no easy way to locate this page, in any case as
// long as the next page is protected, then Windows will figure
// the rest out for us...
//
SYSTEM_INFO si;
GetSystemInfo(&si);
MEMORY_BASIC_INFORMATION mi;
DWORD previous_protection_status;
//
// this is an address in our stack space:
//
LPBYTE page = (LPBYTE)&page;
//
// Get the current memory page in use:
//
VirtualQuery(page, &mi, sizeof(mi));
//
// Go to the page one below this:
//
page = (LPBYTE)(mi.BaseAddress)-si.dwPageSize;
//
// Free and protect everything from the start of the
// allocation range, to the end of the page below the
// one in use:
//
if (!VirtualFree(mi.AllocationBase, (LPBYTE)page - (LPBYTE)mi.AllocationBase, MEM_DECOMMIT)
|| !VirtualProtect(page, si.dwPageSize, PAGE_GUARD | PAGE_READWRITE, &previous_protection_status))
{
throw std::bad_exception();
}
#endif
}
#endif
#if defined(BOOST_REGEX_NON_RECURSIVE) && !defined(BOOST_REGEX_V3)
#if BOOST_REGEX_MAX_CACHE_BLOCKS == 0
BOOST_REGEX_DECL void* BOOST_REGEX_CALL get_mem_block()
{
return ::operator new(BOOST_REGEX_BLOCKSIZE);
}
BOOST_REGEX_DECL void BOOST_REGEX_CALL put_mem_block(void* p)
{
::operator delete(p);
}
#else
#if defined(BOOST_REGEX_MEM_BLOCK_CACHE_LOCK_FREE)
mem_block_cache block_cache = { { {nullptr} } } ;
#elif defined(BOOST_HAS_THREADS)
mem_block_cache block_cache = { 0, 0, BOOST_STATIC_MUTEX_INIT, };
#else
mem_block_cache block_cache = { 0, 0, };
#endif
BOOST_REGEX_DECL void* BOOST_REGEX_CALL get_mem_block()
{
return block_cache.get();
}
BOOST_REGEX_DECL void BOOST_REGEX_CALL put_mem_block(void* p)
{
block_cache.put(p);
}
#endif
#endif
} // namespace BOOST_REGEX_DETAIL_NS
} // namespace boost
#if defined(BOOST_RE_USE_VCL) && defined(BOOST_REGEX_DYN_LINK)
int WINAPI DllEntryPoint(HINSTANCE , unsigned long , void*)
{
return 1;
}
#endif
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