Function Realpath

Source/kwsys/SystemTools.cxx:339–369

  return _wchdir(KWSYS_NAMESPACE::Encoding::ToWide(dir).c_str());
}
inline void Realpath(std::string const& path, std::string& resolved_path,
                     std::string* errorMessage = nullptr)
{
  std::wstring tmp = KWSYS_NAMESPACE::Encoding::ToWide(path);
  wchar_t fullpath[MAX_PATH];
  DWORD bufferLen = GetFullPathNameW(
    tmp.c_str(), sizeof(fullpath) / sizeof(fullpath[0]), fullpath, nullptr);
  if (bufferLen < sizeof(fullpath) / sizeof(fullpath[0])) {
    resolved_path = KWSYS_NAMESPACE::Encoding::ToNarrow(fullpath);
    KWSYS_NAMESPACE::SystemTools::ConvertToUnixSlashes(resolved_path);
  } else if (errorMessage) {
    if (bufferLen) {
      *errorMessage = "Destination path buffer size too small.";
    } else if (unsigned int errorId = GetLastError()) {
      LPSTR message = nullptr;
      DWORD size = FormatMessageA(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
          FORMAT_MESSAGE_IGNORE_INSERTS,
        nullptr, errorId, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPSTR)&message, 0, nullptr);
      *errorMessage = std::string(message, size);
      LocalFree(message);
    } else {
      *errorMessage = "Unknown error.";
    }

    resolved_path = "";
  } else {
    resolved_path = path;
  }
}
#else
#  include <sys/types.h>