fs::path make_relative(fs::path a_From, fs::path a_To)
{
a_From = fs::absolute(a_From); a_To = fs::absolute(a_To);
fs::path ret;
fs::path::const_iterator itrFrom(a_From.begin()), itrTo(a_To.begin());
// Find common base
for (fs::path::const_iterator toEnd(a_To.end()), fromEnd(a_From.end());
itrFrom != fromEnd && itrTo != toEnd && *itrFrom == *itrTo; ++itrFrom, ++itrTo);
// Navigate backwards in directory to reach previously found base
for (fs::path::const_iterator fromEnd(a_From.end());
itrFrom != fromEnd; ++itrFrom)
{
if( (*itrFrom) != "." )
ret /= "..";
}
// Now navigate down the directory branch
ret.append( itrTo, a_To.end() );
return ret;
}
// Return path when appended to from will resolve to same as to
boost::filesystem::path makeRelativePath(boost::filesystem::path from, boost::filesystem::path to)
{
boost::filesystem::path ret;
boost::filesystem::path::const_iterator itrFrom(from.begin()), itrTo(to.begin());
from = boost::filesystem::absolute(from);
to = boost::filesystem::absolute(to);
// Find common base
for (boost::filesystem::path::const_iterator toEnd(to.end()), fromEnd(from.end()); itrFrom != fromEnd && itrTo != toEnd && *itrFrom == *itrTo; ++itrFrom, ++itrTo) ;
// Navigate backwards in directory to reach previously found base
for (boost::filesystem::path::const_iterator fromEnd(from.end()); itrFrom != fromEnd; ++itrFrom) {
if ((*itrFrom) != ".")
ret /= "..";
}
// Now navigate down the directory branch
ret.append(itrTo, to.end());
return ret;
}
