//this is a higher level error checked version of copywin
void copy(frame& src, frame& dst,
const point& src_upper_left,
const point& dst_upper_left,
const point& size) {
auto dst_lower_right=dst_upper_left + size - point{1,1};
#ifndef NDEBUG
{
//this like all high arity functions is a bitch to get right
//hence this debug block
auto dst_dim=dst.get_dimension();
auto src_dim=src.get_dimension();
auto src_lower_right=src_upper_left + size - point{1,1};
CONS_ASSERT(dst_dim.x > dst_lower_right.x
&& dst_dim.y > dst_lower_right.y,
"copy area is larger than destination"
);
CONS_ASSERT(src_dim.x > src_lower_right.x
&& src_dim.y > src_lower_right.y,
"copy area is larger than source: "
);
CONS_ASSERT(src.get_handle(), "source frame is not valid");
CONS_ASSERT(dst.get_handle(), "destination frame is not valid");
}
#endif
if(::copywin(src.get_handle(), dst.get_handle(),
src_upper_left.y, src_upper_left.x,
dst_upper_left.y, dst_upper_left.x,
dst_lower_right.y, dst_lower_right.x, false)==ERR) {
std::ostringstream oss;
oss << "unable to copy window"
<< "\nsource size " << src.get_dimension()
<< "\ndestination size " << dst.get_dimension()
<< "\nupper left source position " << src_upper_left
<< "\nupper left destination position " << dst_upper_left
<< "\ndimension to copy " << size
<< "\ncalculated destination lower right " << dst_lower_right;
throw CONS_MAKE_EXCEPTION(oss.str());
}
}
