lokinet/vendor/cppbackport-master/lib/fs/cleanpath.h

/* Copyright (c) 2015, Pollard Banknote Limited
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

   3. Neither the name of the copyright holder nor the names of its contributors
   may be used to endorse or promote products derived from this software without
   specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */
#ifndef PBL_CPP_FS_CLEANPATH_H
#define PBL_CPP_FS_CLEANPATH_H

#include <string>

namespace cpp17
{
  namespace filesystem
  {
    /** Return a simplified version of path
     *
     * @param path A file system path
     *
     * Collapses multiple path separators (ex., as in "/home//user"); replaces
     * "name/." with "name" and "parent/child/.." with "parent"; removes
     * trailing slashes.
     *
     * The returned path is equivalent to the original path in the sense that it
     * identifies the same file system object. Specifically, relative paths are
     * preserved (ex., no simplification is done to the dot-dot in "../here").
     *
     * If the path is malformed, the empty string is returned. For this
     * function, really only the empty string itself is "malformed".
     *
     * @note This is a textual operation. It does not validate the string
     * against the file system or otherwise touch the file system.
     * @bug foo/bar/../baz may not point to /foo/baz if bar symlinks to
     * flip/flop
     */
    std::string
    cleanpath(const std::string& path);
  }  // namespace filesystem
}  // namespace cpp17

#endif  // PBL_FS_CLEANPATH_H