boost::filesystem::path naive_uncomplete(boost::filesystem::path const path,
boost::filesystem::path const base) {
if (path.has_root_path()){
if (path.root_path() != base.root_path()) {
return path;
} else {
return naive_uncomplete(path.relative_path(), base.relative_path());
}
} else {
if (base.has_root_path()) {
throw "cannot uncomplete a path relative path from a rooted base";
} else {
typedef boost::filesystem::path::const_iterator path_iterator;
path_iterator path_it = path.begin();
path_iterator base_it = base.begin();
while ( path_it != path.end() && base_it != base.end() ) {
if (*path_it != *base_it) break;
++path_it; ++base_it;
}
boost::filesystem::path result;
for (; base_it != base.end(); ++base_it) {
result /= "..";
}
for (; path_it != path.end(); ++path_it) {
result /= *path_it;
}
return result;
}
}
}
boost::filesystem::path MultiresImagePlugin::MakePathRelative(boost::filesystem::path path, boost::filesystem::path base)
{
// Borrowed from: https://svn.boost.org/trac/boost/ticket/1976#comment:2
if (path.has_root_path())
{
if (path.root_path() != base.root_path())
{
return path;
}
else
{
return MakePathRelative(path.relative_path(), base.relative_path());
}
}
else
{
if (base.has_root_path())
{
ROS_WARN("Cannot uncomplete a path relative path from a rooted base.");
return path;
}
else
{
typedef boost::filesystem::path::const_iterator path_iterator;
path_iterator path_it = path.begin();
path_iterator base_it = base.begin();
while (path_it != path.end() && base_it != base.end())
{
if (*path_it != *base_it)
break;
++path_it;
++base_it;
}
boost::filesystem::path result;
for (; base_it != base.end(); ++base_it)
{
result /= "..";
}
for (; path_it != path.end(); ++path_it)
{
result /= *path_it;
}
return result;
}
}
}
// Resolve symlinks
fs::path fs_base::canonicalize(fs::path in) {
fs::path accum;
if (!in.has_root_path()) {
// dir is relative!
accum = fs::system_complete(".");
if (*--accum.end() == ".")
accum = accum.parent_path();
}
#ifdef WIN32
// No C:/ in the path
else if (!in.has_root_name()) {
accum = fs::system_complete(".").root_name() / accum;
}
#endif
BOOST_FOREACH(fs::path seg, in) {
if (seg == ".")
continue;
// We've already canon'd the path's parent, so just remove the last dir
if (seg == "..") {
accum = accum.parent_path();
continue;
}
accum /= seg;
#ifndef WIN32
if (fs::is_symlink(accum)) {
char buff[PATH_MAX];
ssize_t len = readlink(accum.string().c_str(), buff, PATH_MAX);
if (len == -1) {
format fmt = format(error_fmt) % "canonical"
% std::strerror(errno)
% accum;
throw exception(fmt.str());
}
fs::path link_path = std::string(buff, len);
// An absolute link
if (link_path.has_root_path())
accum = canonicalize(link_path);
else {
accum.remove_filename();
accum = canonicalize(accum / link_path);
}
}
#endif
}
// This trickery forces a trailing / onto the dir
if (fs::is_directory(accum)) {
accum /= ".";
accum.remove_filename();
}
return accum;
}
bool is_absolute( const boost::filesystem::path& p) {
return p.has_root_path();
}