Code Reorganization

- Merged Path, File and Directory handling objects from metatask.git.
- Merged unit tests.
- These objects will replace a fair amount of code in task 1.9 and
  more in 2.0.

src/Path.cpp

@@ -0,0 +1,197 @@
+////////////////////////////////////////////////////////////////////////////////
+// task - a command line task list manager.
+//
+// Copyright 2006 - 2009, Paul Beckingham.
+// All rights reserved.
+//
+// This program is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free Software
+// Foundation; either version 2 of the License, or (at your option) any later
+// version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+// details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the
+//
+//     Free Software Foundation, Inc.,
+//     51 Franklin Street, Fifth Floor,
+//     Boston, MA
+//     02110-1301
+//     USA
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <fstream>
+#include <glob.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <unistd.h>
+#include "Path.h"
+
+////////////////////////////////////////////////////////////////////////////////
+Path::Path ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Path::Path (const Path& other)
+{
+  if (this != &other)
+    data = other.data;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Path::Path (const std::string& in)
+{
+  data = expand (in);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Path::~Path ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Path& Path::operator= (const Path& other)
+{
+  if (this != &other)
+    this->data = other.data;
+
+  return *this;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+std::string Path::name () const
+{
+  if (data.length ())
+  {
+    std::string::size_type slash = data.rfind ('/');
+    if (slash != std::string::npos)
+      return data.substr (slash + 1, std::string::npos);
+  }
+
+ return data;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+std::string Path::parent () const
+{
+  if (data.length ())
+  {
+    std::string::size_type slash = data.rfind ('/');
+    if (slash != std::string::npos)
+      return data.substr (0, slash);
+  }
+
+  return "";
+}
+
+////////////////////////////////////////////////////////////////////////////////
+std::string Path::extension () const
+{
+  if (data.length ())
+  {
+    std::string::size_type dot = data.rfind ('.');
+    if (dot != std::string::npos)
+      return data.substr (dot + 1, std::string::npos);
+  }
+
+  return "";
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Path::exists () const
+{
+  return access (data.c_str (), F_OK) ? false : true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Path::is_directory () const
+{
+  struct stat s = {0};
+  if (! stat (data.c_str (), &s) &&
+      s.st_mode & S_IFDIR)
+    return true;
+
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Path::readable () const
+{
+  return access (data.c_str (), R_OK) ? false : true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Path::writable () const
+{
+  return access (data.c_str (), W_OK) ? false : true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Path::executable () const
+{
+  return access (data.c_str (), X_OK) ? false : true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// ~      --> /home/user
+// ~foo/x --> /home/foo/s
+// ~/x    --> /home/foo/x
+std::string Path::expand (const std::string& in)
+{
+  std::string copy = in;
+
+  std::string::size_type tilde = copy.find ("~");
+  std::string::size_type slash;
+
+  if (tilde != std::string::npos)
+  {
+    struct passwd* pw = getpwuid (getuid ());
+
+    // Convert: ~ --> /home/user
+    if (copy.length () == 1)
+    {
+      copy = pw->pw_dir;
+    }
+
+    // Convert: ~/x --> /home/user/x
+    else if (copy.length () > tilde + 1 &&
+             copy[tilde + 1] == '/')
+    {
+      copy.replace (tilde, 1, pw->pw_dir);
+    }
+
+    // Convert: ~foo/x --> /home/foo/x
+    else if ((slash = copy.find  ("/", tilde)) != std::string::npos)
+    {
+      std::string name = copy.substr (tilde + 1, slash - tilde - 1);
+      struct passwd* pw = getpwnam (name.c_str ());
+      if (pw)
+        copy.replace (tilde, slash - tilde, pw->pw_dir);
+    }
+  }
+
+  return copy;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+std::vector <std::string> Path::glob (const std::string& pattern)
+{
+  std::vector <std::string> results;
+
+  glob_t g;
+  if (!::glob (pattern.c_str (), GLOB_ERR | GLOB_BRACE | GLOB_TILDE, NULL, &g))
+    for (int i = 0; i < g.gl_matchc; ++i)
+      results.push_back (g.gl_pathv[i]);
+
+  globfree (&g);
+  return results;
+}
+
+////////////////////////////////////////////////////////////////////////////////