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/*
*
* Copyright (c) 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_raw_buffer.cpp
* VERSION see <boost/version.hpp>
* DESCRIPTION: Member functions for class raw_storage.
*/
#define BOOST_REGEX_SOURCE
#include <boost/config.hpp>
#include <memory>
#include <cstring>
#include <boost/assert.hpp>
#include <boost/regex/v4/regex_raw_buffer.hpp>
#if defined(BOOST_NO_STDC_NAMESPACE)
namespace std{
using ::memcpy;
using ::memmove;
}
#endif
namespace boost{ namespace BOOST_REGEX_DETAIL_NS{
void BOOST_REGEX_CALL raw_storage::resize(size_type n)
{
size_type newsize = start ? last - start : 1024;
while(newsize < n)
newsize *= 2;
size_type datasize = end - start;
// extend newsize to WORD/DWORD boundary:
newsize = (newsize + padding_mask) & ~(padding_mask);
// allocate and copy data:
pointer ptr = static_cast<pointer>(::operator new(newsize));
BOOST_REGEX_NOEH_ASSERT(ptr)
if(start)
std::memcpy(ptr, start, datasize);
// get rid of old buffer:
::operator delete(start);
// and set up pointers:
start = ptr;
end = ptr + datasize;
last = ptr + newsize;
}
void* BOOST_REGEX_CALL raw_storage::insert(size_type pos, size_type n)
{
BOOST_ASSERT(pos <= size_type(end - start));
if(size_type(last - end) < n)
resize(n + (end - start));
void* result = start + pos;
std::memmove(start + pos + n, start + pos, (end - start) - pos);
end += n;
return result;
}
}} // namespaces
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