BOOST_FILESYSTEM_DECL
void convert(const char* from,
const char* from_end, // 0 for null terminated MBCS
std::wstring & to,
const codecvt_type & cvt)
{
BOOST_ASSERT(from);
if (!from_end) // null terminated
{
from_end = from + std::strlen(from);
}
if (from == from_end) return;
std::size_t buf_size = (from_end - from) * 3; // perhaps too large, but that's OK
// dynamically allocate a buffer only if source is unusually large
if (buf_size > default_codecvt_buf_size)
{
boost::scoped_array< wchar_t > buf(new wchar_t [buf_size]);
convert_aux(from, from_end, buf.get(), buf.get()+buf_size, to, cvt);
}
else
{
wchar_t buf[default_codecvt_buf_size];
convert_aux(from, from_end, buf, buf+default_codecvt_buf_size, to, cvt);
}
}
BOOST_FILESYSTEM_DECL
void convert(const wchar_t* from,
const wchar_t* from_end, // 0 for null terminated MBCS
std::string & to,
const codecvt_type & cvt)
{
BOOST_ASSERT(from);
if (!from_end) // null terminated
{
from_end = from + std::wcslen(from);
}
if (from == from_end) return;
// The codecvt length functions may not be implemented, and I don't really
// understand them either. Thus this code is just a guess; if it turns
// out the buffer is too small then an error will be reported and the code
// will have to be fixed.
std::size_t buf_size = (from_end - from) * 4; // perhaps too large, but that's OK
buf_size += 4; // encodings like shift-JIS need some prefix space
// dynamically allocate a buffer only if source is unusually large
if (buf_size > default_codecvt_buf_size)
{
boost::scoped_array< char > buf(new char [buf_size]);
convert_aux(from, from_end, buf.get(), buf.get()+buf_size, to, cvt);
}
else
{
char buf[default_codecvt_buf_size];
convert_aux(from, from_end, buf, buf+default_codecvt_buf_size, to, cvt);
}
}
void convert(const wchar_t* from, const wchar_t* from_end, std::string& to, const codecvt_type& cvt, conv_method how)
{
assert(from);
if (!from_end)
{
from_end = from + std::wcslen(from);
}
if (from == from_end) return;
std::size_t buf_size = (from_end - from) * 4;
buf_size += 4;
if (buf_size > default_codecvt_buf_size)
{
std::dynarray<char> buf(buf_size);
convert_aux(from, from_end, buf.begin(), buf.end(), to, cvt, how);
}
else
{
std::array<char, default_codecvt_buf_size> buf;
convert_aux(from, from_end, &*buf.begin(), &*buf.begin() + buf.size(), to, cvt, how);
}
}
