From 61377c582e0f2675baa5f5e6e30a35d1a4164b33 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Mon, 1 May 2017 16:08:43 +0300
Subject: Add hxx extension for headers and lib prefix for library dir

---
 libbutl/path.ixx | 508 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 508 insertions(+)
 create mode 100644 libbutl/path.ixx

(limited to 'libbutl/path.ixx')

diff --git a/libbutl/path.ixx b/libbutl/path.ixx
new file mode 100644
index 0000000..c140d1e
--- /dev/null
+++ b/libbutl/path.ixx
@@ -0,0 +1,508 @@
+// file      : libbutl/path.ixx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifdef _WIN32
+#  include <cwctype> // towlower(), towupper()
+#endif
+
+namespace butl
+{
+#ifdef _WIN32
+  template <>
+  inline char path_traits<char>::
+  tolower (char c)
+  {
+    return lcase (c);
+  }
+
+  template <>
+  inline wchar_t path_traits<wchar_t>::
+  tolower (wchar_t c)
+  {
+    return std::towlower (c);
+  }
+
+  template <>
+  inline char path_traits<char>::
+  toupper (char c)
+  {
+    return ucase (c);
+  }
+
+  template <>
+  inline wchar_t path_traits<wchar_t>::
+  toupper (wchar_t c)
+  {
+    return std::towupper (c);
+  }
+#endif
+
+  template <class C, class K1, class K2>
+  inline basic_path<C, K1>
+  path_cast_impl (const basic_path<C, K2>& p, basic_path<C, K1>*)
+  {
+    typename basic_path<C, K1>::data_type d (
+      typename basic_path<C, K1>::string_type (p.path_), p.tsep_);
+    K1::cast (d);
+    return basic_path<C, K1> (std::move (d));
+  }
+
+  template <class C, class K1, class K2>
+  inline basic_path<C, K1>
+  path_cast_impl (basic_path<C, K2>&& p, basic_path<C, K1>*)
+  {
+    typename basic_path<C, K1>::data_type d (std::move (p.path_), p.tsep_);
+    K1::cast (d);
+    return basic_path<C, K1> (std::move (d));
+  }
+
+  template <class P, class C, class K>
+  inline P
+  path_cast (const basic_path<C, K>& p)
+  {
+    return path_cast_impl (p, static_cast<P*> (nullptr));
+  }
+
+  template <class P, class C, class K>
+  inline P
+  path_cast (basic_path<C, K>&& p)
+  {
+    return path_cast_impl (std::move (p), static_cast<P*> (nullptr));
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  simple () const
+  {
+    return empty () ||
+      traits::rfind_separator (this->path_, _size () - 1) == string_type::npos;
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  absolute () const
+  {
+    return traits::absolute (this->path_);
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  current () const
+  {
+    return traits::current (this->path_);
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  parent () const
+  {
+    return traits::parent (this->path_);
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  root () const
+  {
+    return traits::root (this->path_);
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  sub (const basic_path& p) const
+  {
+    // The thinking here is that we can use the full string representations
+    // (including the trailing slash in "/").
+    //
+    const string_type& ps (p.path_);
+    size_type pn (ps.size ());
+
+    if (pn == 0)
+      return true;
+
+    const string_type& s (this->path_);
+    size_type n (s.size ());
+
+    // The second condition guards against the /foo-bar vs /foo case.
+    //
+    return n >= pn &&
+      traits::compare (s.c_str (), pn, ps.c_str (), pn) == 0 &&
+      (traits::is_separator (ps.back ())      || // p ends with a separator
+       n == pn                                || // *this == p
+       traits::is_separator (s[pn]));            // next char is a separator
+  }
+
+  template <typename C, typename K>
+  inline bool basic_path<C, K>::
+  sup (const basic_path& p) const
+  {
+    // The thinking here is that we can use the full string representations
+    // (including the trailing slash in "/").
+    //
+    const string_type& ps (p.path_);
+    size_type pn (ps.size ());
+
+    if (pn == 0)
+      return true;
+
+    const string_type& s (this->path_);
+    size_type n (s.size ());
+
+    // The second condition guards against the /foo-bar vs bar case.
+    //
+    return n >= pn &&
+      traits::compare (s.c_str () +  n - pn, pn, ps.c_str (), pn) == 0 &&
+      (n == pn ||                             // *this == p
+       traits::is_separator (s[n - pn - 1])); // previous char is a separator
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K> basic_path<C, K>::
+  leaf () const
+  {
+    const string_type& s (this->path_);
+    size_type n (_size ());
+
+    size_type p (n != 0
+                 ? traits::rfind_separator (s, n - 1)
+                 : string_type::npos);
+
+    return p != string_type::npos
+      ? basic_path (data_type (string_type (s, p + 1), this->tsep_))
+      : *this;
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::dir_type basic_path<C, K>::
+  directory () const
+  {
+    const string_type& s (this->path_);
+    size_type n (_size ());
+
+    size_type p (n != 0
+                 ? traits::rfind_separator (s, n - 1)
+                 : string_type::npos);
+
+    return p != string_type::npos
+      ? dir_type (data_type (string_type (s, 0, p + 1))) // Include slash.
+      : dir_type ();
+  }
+
+  template <typename C, typename K>
+  inline auto basic_path<C, K>::
+  begin () const -> iterator
+  {
+    const string_type& s (this->path_);
+
+    size_type b (s.empty () ? string_type::npos : 0);
+    size_type e (b == 0 ? traits::find_separator (s) : b);
+
+    return iterator (this, b, e);
+  }
+
+  template <typename C, typename K>
+  inline auto basic_path<C, K>::
+  end () const -> iterator
+  {
+    return iterator (this, string_type::npos, string_type::npos);
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>::
+  basic_path (const iterator& b, const iterator& e)
+      : base_type (
+        b == e
+        ? data_type ()
+        // We need to include the trailing separator but it is implied if
+        // e == end().
+        //
+        : (e.b_ != string_type::npos
+           ? data_type (string_type (b.p_->path_, b.b_, e.b_ - b.b_))
+           : data_type (string_type (b.p_->path_, b.b_), b.p_->tsep_)))
+  {
+    //assert (b.p_ == e.p_);
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  canonicalize ()
+  {
+    traits::canonicalize (this->path_);
+
+    if (this->tsep_ > 1) // Non-canonical trailing separator.
+      this->tsep_ = 1;
+
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  complete ()
+  {
+    if (relative ())
+      *this = current_directory () / *this;
+
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  realize ()
+  {
+#ifdef _WIN32
+    // This is not exactly the semantics of realpath(3). In particular, we
+    // don't fail if the path does not exist. But we could have seeing that
+    // we actualize it.
+    //
+    complete ();
+    normalize (true);
+#else
+    traits::realize (this->path_); // Note: we retain the trailing slash.
+#endif
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::dir_type basic_path<C, K>::
+  root_directory () const
+  {
+#ifdef _WIN32
+    // Note: on Windows we may have "c:" but still need to return "c:\".
+    //
+    const string_type& s (this->path_);
+
+    return absolute ()
+      ? dir_type (
+        s.size () > 2
+        ? data_type (string_type (s, 0, 3))
+        : data_type (string_type (s), this->tsep_ != 0 ? this->tsep_ : 1))
+      : dir_type ();
+#else
+    return absolute ()
+      ? dir_type (data_type ("/", -1))
+      : dir_type ();
+#endif
+
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K> basic_path<C, K>::
+  base () const
+  {
+    const string_type& s (this->path_);
+    size_type p (traits::find_extension (s));
+
+    return p != string_type::npos
+      ? basic_path (data_type (string_type (s, 0, p), this->tsep_))
+      : *this;
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::string_type basic_path<C, K>::
+  extension () const
+  {
+    const string_type& s (this->path_);
+    size_type p (traits::find_extension (s));
+    return p != string_type::npos
+      ? string_type (s.c_str () + p + 1)
+      : string_type ();
+  }
+
+  template <typename C, typename K>
+  inline const C* basic_path<C, K>::
+  extension_cstring () const
+  {
+    const string_type& s (this->path_);
+    size_type p (traits::find_extension (s));
+    return p != string_type::npos ? s.c_str () + p + 1 : nullptr;
+  }
+
+#ifndef _WIN32
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::string_type basic_path<C, K>::
+  posix_string () const&
+  {
+    return string ();
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::string_type basic_path<C, K>::
+  posix_string () &&
+  {
+    return std::move (*this).string ();
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::string_type basic_path<C, K>::
+  posix_representation () const&
+  {
+    return representation ();
+  }
+
+  template <typename C, typename K>
+  inline typename basic_path<C, K>::string_type basic_path<C, K>::
+  posix_representation () &&
+  {
+    return std::move (*this).representation ();
+  }
+#endif
+
+  template <typename C, typename K>
+  inline void basic_path<C, K>::
+  combine (const C* r, size_type rn, difference_type rts)
+  {
+    //assert (rn != 0);
+
+    string_type& l (this->path_);
+    difference_type& ts (this->tsep_);
+
+    // Handle the separator. LHS should be empty or already have one.
+    //
+    switch (ts)
+    {
+    case  0: if (!l.empty ()) throw invalid_basic_path<C> (l); break;
+    case -1: break; // Already in the string.
+    default: l += path_traits<C>::directory_separators[ts - 1];
+    }
+
+    l.append (r, rn);
+    ts = rts; // New trailing separator from RHS.
+  }
+
+  template <typename C, typename K>
+  inline void basic_path<C, K>::
+  combine (const C* r, size_type rn)
+  {
+    // If we do (dir_path / path) then we will end up with path. What should
+    // we end up if we do (dir_path / "foo") vs (dir_path / "foo/")? We cannot
+    // choose at runtime what kind of path to return. One (elaborate) option
+    // would be to handle the trailing slash but also call K::cast() so that
+    // dir_path gets the canonical trailing slash if one wasn't there.
+    //
+    // For now we won't allow the slash and will always add the canonical one
+    // for dir_path (via cast()).
+    //
+    if (traits::find_separator (r, rn) != nullptr)
+      throw invalid_basic_path<C> (r);
+
+    combine (r, rn, 0);
+    K::cast (*this);
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator/= (basic_path<C, K> const& r)
+  {
+    if (r.absolute () && !empty ()) // Allow ('' / '/foo').
+      throw invalid_basic_path<C> (r.path_);
+
+    if (!r.empty ())
+      combine (r.path_.c_str (), r.path_.size (), r.tsep_);
+
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator/= (string_type const& r)
+  {
+    if (size_type rn = r.size ())
+      combine (r.c_str (), rn);
+
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator/= (const C* r)
+  {
+    if (size_type rn = string_type::traits_type::length (r))
+      combine (r, rn);
+
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline void basic_path<C, K>::
+  append (const C* r, size_type rn)
+  {
+    //assert (this->tsep_ != -1); // Append to root?
+    this->path_.append (r, rn);
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator+= (string_type const& s)
+  {
+    append (s.c_str (), s.size ());
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator+= (const C* s)
+  {
+    append (s, string_type::traits_type::length (s));
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline basic_path<C, K>& basic_path<C, K>::
+  operator+= (C c)
+  {
+    append (&c, 1);
+    return *this;
+  }
+
+  template <typename C, typename K>
+  inline auto basic_path<C, K>::
+  representation () const& -> string_type
+  {
+    string_type r (this->path_);
+
+    if (this->tsep_ > 0)
+      r += path_traits<C>::directory_separators[this->tsep_ - 1];
+
+    return r;
+  }
+
+  template <typename C, typename K>
+  inline auto basic_path<C, K>::
+  representation () && -> string_type
+  {
+    string_type r;
+    r.swap (this->path_);
+
+    if (this->tsep_ > 0)
+      r += path_traits<C>::directory_separators[this->tsep_ - 1];
+
+    return r;
+  }
+
+  template <typename C, typename K>
+  inline C basic_path<C, K>::
+  separator () const
+  {
+    return (this->tsep_ ==  0 ? 0 :
+            this->tsep_ == -1 ? this->path_[0] :
+            path_traits<C>::directory_separators[this->tsep_ - 1]);
+  }
+
+  template <typename C, typename K>
+  inline auto basic_path<C, K>::
+  separator_string () const -> string_type
+  {
+    C c (separator ());
+    return c == 0 ? string_type () : string_type (1, c);
+  }
+
+  template <typename C>
+  inline void dir_path_kind<C>::
+  cast (data_type& d)
+  {
+    // Add trailing slash if one isn't already there.
+    //
+    if (!d.path_.empty () && d.tsep_ == 0)
+      d.tsep_ = 1; // Canonical separator is always first.
+  }
+}
-- 
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