The GtkRadiant sources as originally released under the GPL license.

libs/fs_path.h

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+/*
+Copyright (C) 2001-2006, William Joseph.
+All Rights Reserved.
+
+This file is part of GtkRadiant.
+
+GtkRadiant 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.
+
+GtkRadiant 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 GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if !defined(INCLUDED_FS_PATH_H)
+#define INCLUDED_FS_PATH_H
+
+#include "stream/stringstream.h"
+
+/// \brief A unix-style path string which can be modified at runtime.
+///
+/// - Maintains a path ending in a path-separator.
+/// - Provides a limited STL-style interface to push and pop file or directory names at the end of the path.
+class UnixPath
+{
+  StringBuffer m_string;
+
+  void check_separator()
+  {
+    if(!empty() && m_string.back() != '/')
+    {
+      m_string.push_back('/');
+    }
+  }
+
+public:
+  /// \brief Constructs with the directory \p root.
+  UnixPath(const char* root)
+    : m_string(root)
+  {
+    check_separator();
+  }
+
+  bool empty() const
+  {
+    return m_string.empty();
+  }
+
+  const char* c_str() const
+  {
+    return m_string.c_str();
+  }
+
+  /// \brief Appends the directory \p name.
+  void push(const char* name)
+  {
+    m_string.push_string(name);
+    check_separator();
+  }
+  /// \brief Appends the directory [\p first, \p last).
+  void push(const char* first, const char* last)
+  {
+    m_string.push_range(first, last);
+    check_separator();
+  }
+  /// \brief Appends the filename \p name.
+  void push_filename(const char* name)
+  {
+    m_string.push_string(name);
+  }
+  /// \brief Removes the last directory or filename appended.
+  void pop()
+  {
+    if(m_string.back() == '/')
+    {
+      m_string.pop_back();
+    }
+    while(!empty() && m_string.back() != '/')
+    {
+      m_string.pop_back();
+    }
+  }
+};
+
+#endif