void callback(std::ios_base::event ev, std::ios_base& strm, int idx)
{
if (ev == std::ios_base::erase_event)
{
try
{
delete static_cast<NewFormat*>(strm.pword(idx));
strm.pword(idx) = 0;
}
catch (...)
{ }
}
else if (ev == std::ios_base::copyfmt_event)
{
NewFormat* old(static_cast<NewFormat*>(strm.pword(idx)));
if (old != 0)
{
try
{
strm.pword(idx) = new NewFormat(*old);
}
catch (std::bad_alloc&)
{ }
}
}
}
void replace_pword(std::ios_base& iob, int idx, const T& x) {
iob.register_callback(callback<NewFormat>, idx);
NewFormat* new_format(new NewFormat(x));
OldFormat* old_format(static_cast<OldFormat*>(iob.pword(idx)));
iob.pword(idx) = new_format;
delete old_format;
}
// Stream format gets copied or destroyed
static void my_ios_callback(std::ios_base::event ev, std::ios_base & s, int i)
{
print_context *p = static_cast<print_context *>(s.pword(i));
if (ev == std::ios_base::erase_event) {
delete p;
s.pword(i) = nullptr;
} else if (ev == std::ios_base::copyfmt_event && p != nullptr)
s.pword(i) = p->duplicate();
}
// Set print_context associated with stream, retain options
static void set_print_context(std::ios_base & s, const print_context & c)
{
int i = my_ios_index();
long flags = s.iword(i);
if (!(flags & callback_registered)) {
s.register_callback(my_ios_callback, i);
s.iword(i) = flags | callback_registered;
}
print_context *p = static_cast<print_context *>(s.pword(i));
unsigned options = p ? p->options : c.options;
delete p;
p = c.duplicate();
p->options = options;
s.pword(i) = p;
}
void cleanup(std::ios_base::event evt, std::ios_base& str, int idx)
{
if (str.iword(separatorEnabled()) && evt == std::ios_base::erase_event)
{
void*& p = str.pword(idx);
delete static_cast<std::string*>(p);
str.iword(separatorEnabled()) = false;
}
}
void
TimeStreamFormater::setStreamInfo(std::ios_base & theStream) const {
theStream.iword(ourIsFormatedFlagIndex) = true;
theStream.pword(ourFormatStringIndex) = (void *) _myFormatString ;
}