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-rw-r--r--build/path327
1 files changed, 327 insertions, 0 deletions
diff --git a/build/path b/build/path
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@@ -0,0 +1,327 @@
+// file : cutl/path -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license : MIT; see accompanying LICENSE file
+
+#ifndef BUILD_PATH
+#define BUILD_PATH
+
+#include <string>
+#include <ostream>
+#include <exception>
+
+namespace build
+{
+ template <typename C>
+ class basic_path;
+
+ template <typename C>
+ struct path_traits
+ {
+ typedef std::basic_string<C> string_type;
+ typedef typename string_type::size_type size_type;
+
+ // Canonical directory and path seperators.
+ //
+#ifdef _WIN32
+ static C const directory_separator = '\\';
+ static C const path_separator = ';';
+#else
+ static C const directory_separator = '/';
+ static C const path_separator = ':';
+#endif
+
+ // Directory separator tests. On some platforms there
+ // could be multiple seperators. For example, on Windows
+ // we check for both '/' and '\'.
+ //
+ static bool
+ is_separator (C c)
+ {
+#ifdef _WIN32
+ return c == '\\' || c == '/';
+#else
+ return c == '/';
+#endif
+ }
+
+ static size_type
+ find_separator (string_type const& s, size_type pos = 0)
+ {
+ for (size_type n (s.size ()); pos < n; ++pos)
+ {
+ if (is_separator (s[pos]))
+ return pos;
+ }
+
+ return string_type::npos;
+ }
+
+ static size_type
+ rfind_separator (string_type const& s, size_type pos = string_type::npos)
+ {
+ if (pos == string_type::npos)
+ pos = s.size ();
+ else
+ pos++;
+
+ for (; pos > 0; --pos)
+ {
+ if (is_separator (s[pos - 1]))
+ return pos - 1;
+ }
+
+ return string_type::npos;
+ }
+
+ static int
+ compare (string_type const& l, string_type const& r)
+ {
+ size_type ln (l.size ()), rn (r.size ()), n (ln < rn ? ln : rn);
+ for (size_type i (0); i != n; ++i)
+ {
+#ifdef _WIN32
+ C lc (tolower (l[i])), rc (tolower (r[i]));
+#else
+ C lc (l[i]), rc (r[i]);
+#endif
+ if (is_separator (lc) && is_separator (rc))
+ continue;
+
+ if (lc < rc) return -1;
+ if (lc > rc) return 1;
+ }
+
+ return ln < rn ? -1 : (ln > rn ? 1 : 0);
+ }
+
+ private:
+#ifdef _WIN32
+ static C
+ tolower (C);
+#endif
+ };
+
+ template <typename C>
+ class invalid_basic_path;
+
+ typedef basic_path<char> path;
+ typedef invalid_basic_path<char> invalid_path;
+
+ typedef basic_path<wchar_t> wpath;
+ typedef invalid_basic_path<wchar_t> invalid_wpath;
+
+ //
+ //
+ class invalid_path_base: std::exception
+ {
+ public:
+ virtual char const*
+ what () const throw ();
+ };
+
+ template <typename C>
+ class invalid_basic_path: public invalid_path_base
+ {
+ public:
+ typedef std::basic_string<C> string_type;
+
+ invalid_basic_path (C const* p): path_ (p) {}
+ invalid_basic_path (string_type const& p): path_ (p) {}
+ ~invalid_basic_path () throw () {}
+
+ string_type const&
+ path () const
+ {
+ return path_;
+ }
+
+ private:
+ string_type path_;
+ };
+
+ template <typename C>
+ class basic_path
+ {
+ public:
+ typedef std::basic_string<C> string_type;
+ typedef typename string_type::size_type size_type;
+
+ typedef path_traits<C> traits;
+
+ // Construct special empty path.
+ //
+ basic_path ()
+ {
+ }
+
+ explicit
+ basic_path (C const* s)
+ : path_ (s)
+ {
+ init ();
+ }
+
+ basic_path (C const* s, size_type n)
+ : path_ (s, n)
+ {
+ init ();
+ }
+
+ explicit
+ basic_path (string_type const& s)
+ : path_ (s)
+ {
+ init ();
+ }
+
+ void
+ swap (basic_path& p)
+ {
+ path_.swap (p.path_);
+ }
+
+ void
+ clear ()
+ {
+ path_.clear ();
+ }
+
+ static basic_path
+ current ();
+
+ static void
+ current (basic_path const&);
+
+ public:
+ bool
+ empty () const
+ {
+ return path_.empty ();
+ }
+
+ bool
+ absolute () const;
+
+ bool
+ relative () const
+ {
+ return !absolute ();
+ }
+
+ bool
+ root () const;
+
+ public:
+ // Return the path without the directory part.
+ //
+ basic_path
+ leaf () const;
+
+ // Return the directory part of the path or empty path if
+ // there is no directory.
+ //
+ basic_path
+ directory () const;
+
+ // Return the path without the extension, if any.
+ //
+ basic_path
+ base () const;
+
+ public:
+ // Normalize the path. This includes collapsing the '.' and '..'
+ // directories if possible, collapsing multiple directory
+ // separators, and converting all directory separators to the
+ // canonical form. Returns *this.
+ //
+ basic_path&
+ normalize ();
+
+ // Make the path absolute using the current directory unless
+ // it is already absolute.
+ //
+ basic_path&
+ complete ();
+
+ public:
+ basic_path
+ operator/ (basic_path const& x) const
+ {
+ basic_path r (*this);
+ r /= x;
+ return r;
+ }
+
+ basic_path&
+ operator/= (basic_path const&);
+
+ basic_path
+ operator+ (string_type const& s) const
+ {
+ return basic_path (path_ + s);
+ }
+
+ basic_path&
+ operator+= (string_type const& s)
+ {
+ path_ += s;
+ return *this;
+ }
+
+ // Note that comparison is case-insensitive if the filesystem is
+ // not case-sensitive (e.g., Windows).
+ //
+ bool
+ operator== (basic_path const& x) const
+ {
+ return traits::compare (path_, x.path_) == 0;
+ }
+
+ bool
+ operator!= (basic_path const& x) const
+ {
+ return !(*this == x);
+ }
+
+ bool
+ operator< (basic_path const& x) const
+ {
+ return traits::compare (path_, x.path_) < 0;
+ }
+
+ public:
+ string_type
+ string () const
+ {
+ return path_;
+ }
+
+ // If possible, return a POSIX representation of the path. For example,
+ // for a Windows path in the form foo\bar this function will return
+ // foo/bar. If it is not possible to create a POSIX representation for
+ // this path (e.g., c:\foo), this function will throw the invalid_path
+ // exception.
+ //
+ string_type
+ posix_string () const;
+
+ private:
+ void
+ init ();
+
+ private:
+ string_type path_;
+ };
+
+ template <typename C>
+ inline std::basic_ostream<C>&
+ operator<< (std::basic_ostream<C>& os, basic_path<C> const& p)
+ {
+ return os << p.string ();
+ }
+}
+
+#include <build/path.ixx>
+#include <build/path.txx>
+
+#endif // BUILD_PATH