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// file : cutl/fs/path.txx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <vector>
namespace cutl
{
namespace fs
{
template <typename C>
basic_path<C> basic_path<C>::
leaf () const
{
size_type p (traits::rfind_separator (path_));
return p != string_type::npos
? basic_path (path_.c_str () + p + 1, path_.size () - p - 1)
: *this;
}
template <typename C>
basic_path<C> basic_path<C>::
directory () const
{
if (root ())
return basic_path ();
size_type p (traits::rfind_separator (path_));
// Include the trailing slash so that we get correct behavior
// if directory is root.
//
return p != string_type::npos
? basic_path (path_.c_str (), p + 1)
: basic_path ();
}
template <typename C>
basic_path<C> basic_path<C>::
base () const
{
size_type i (path_.size ());
for (; i > 0; --i)
{
if (path_[i - 1] == '.')
break;
if (traits::is_separator (path_[i - 1]))
{
i = 0;
break;
}
}
// Weed out paths like ".txt" and "/.txt"
//
if (i > 1 && !traits::is_separator (path_[i - 2]))
{
return basic_path (path_.c_str (), i - 1);
}
else
return *this;
}
#ifdef _WIN32
template <typename C>
typename basic_path<C>::string_type basic_path<C>::
posix_string () const
{
if (absolute ())
throw invalid_basic_path<C> (path_);
string_type r (path_);
// Translate Windows-style separators to the POSIX ones.
//
for (size_type i (0), n (r.size ()); i != n; ++i)
if (r[i] == '\\')
r[i] = '/';
return r;
}
#endif
template <typename C>
basic_path<C>& basic_path<C>::
operator/= (basic_path<C> const& r)
{
if (r.absolute ())
throw invalid_basic_path<C> (r.path_);
if (path_.empty () || r.path_.empty ())
{
path_ += r.path_;
return *this;
}
if (!traits::is_separator (path_[path_.size () - 1]))
path_ += traits::directory_separator;
path_ += r.path_;
return *this;
}
template <typename C>
basic_path<C>& basic_path<C>::
normalize ()
{
if (empty ())
return *this;
bool abs (absolute ());
typedef std::vector<string_type> paths;
paths ps;
for (size_type b (0), e (traits::find_separator (path_)),
n (path_.size ());;
e = traits::find_separator (path_, b))
{
string_type s (path_, b, e == string_type::npos ? e : e - b);
ps.push_back (s);
if (e == string_type::npos)
break;
++e;
while (e < n && traits::is_separator (path_[e]))
++e;
if (e == n)
break;
b = e;
}
// First collapse '.' and '..'.
//
paths r;
for (typename paths::const_iterator i (ps.begin ()), e (ps.end ());
i != e; ++i)
{
string_type const& s (*i);
size_type n (s.size ());
if (n == 1 && s[0] == '.')
continue;
if (n == 2 && s[0] == '.' && s[1] == '.')
{
// Pop the last directory from r unless it is '..'.
//
if (!r.empty ())
{
string_type const& s1 (r.back ());
if (!(s1.size () == 2 && s1[0] == '.' && s1[1] == '.'))
{
// Cannot go past the root directory.
//
if (abs && r.size () == 1)
throw invalid_basic_path<C> (path_);
r.pop_back ();
continue;
}
}
}
r.push_back (s);
}
// Reassemble the path.
//
string_type p;
for (typename paths::const_iterator i (r.begin ()), e (r.end ());
i != e;)
{
#ifdef _WIN32
for (size_type j (0), n (i->size ()); j < n; ++j)
p += tolower ((*i)[j]);
#else
p += *i;
#endif
++i;
if (i != e)
p += traits::directory_separator;
}
if (p.empty () && !r.empty ())
p += traits::directory_separator; // Root directory.
path_.swap (p);
return *this;
}
template <typename C>
void basic_path<C>::
init ()
{
// Strip trailing slashes except for the case where the single
// slash represents the root directory.
//
size_type n (path_.size ());
for (; n > 1 && traits::is_separator (path_[n - 1]); --n) ;
path_.resize (n);
}
}
}
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