#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2013 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library 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
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

// If the library is compiled as a DLL, this ensures symbols are exported
#define NUCLEX_STORAGE_SOURCE 1

#include "WindowsPathFormat.h"

#if defined(NUCLEX_STORAGE_WIN32)

#include "WindowsFileApi.h"

namespace Nuclex { namespace Storage { namespace FileSystem {

  // ------------------------------------------------------------------------------------------- //

  const char WindowsPathFormat::PathSeparator = '\\';

  // ------------------------------------------------------------------------------------------- //

  const bool WindowsPathFormat::HasCurrentWorkingDirectory = true;

  // ------------------------------------------------------------------------------------------- //

  std::string WindowsPathFormat::GetCurrentWorkingDirectory() {
    return WindowsFileApi::GetCurrentWorkingDirectory();
  }

  // ------------------------------------------------------------------------------------------- //

  std::size_t WindowsPathFormat::GetAbsolutePathPrefixLength(const std::string &path) {
    std::size_t length = path.length();

    if(length > 1) {
      using namespace std;

      // Only the "\\" in UNC paths is considered to form an absolute path qualifier
      bool isUncPath = (path[0] == '\\') && (path[1] == '\\');
      if(isUncPath) {
        return 2;
      }

      // If there's a drive letter, this can only be an absolute path
      bool hasDriveLetter = (isalpha(path[0]) && (path[1] == ':'));
      if(hasDriveLetter) {

        // In case a directory separator follows, that, too, becomes part of
        // the absolute path qualifier.
        if(length > 2) {
          bool hasDriveLetterAndSeparator = IsPathSeparator(path[2]);
          if(hasDriveLetterAndSeparator) {
            return 3;
          }
        }

        // We encountered only a drive letter with no path separator behind it
        return 2;

      }
    }

    // It's a relative path
    return 0;
  }

  // ------------------------------------------------------------------------------------------- //

}}} // namespace Nuclex::Storage::FileSystem

#endif // defined(NUCLEX_STORAGE_WIN32)