third-party-mirror / GRTEv4 / 262be5abc585813b1766119db73641d44ba3741e / . / google3 / third_party / grte / v4_src / glibc-2.19 / bits / wchar.h

/* wchar_t type related definitions. | |

Copyright (C) 2000-2014 Free Software Foundation, Inc. | |

This file is part of the GNU C Library. | |

The GNU C Library is free software; you can redistribute it and/or | |

modify it under the terms of the GNU Lesser General Public | |

License as published by the Free Software Foundation; either | |

version 2.1 of the License, or (at your option) any later version. | |

The GNU C 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 GNU | |

Lesser General Public License for more details. | |

You should have received a copy of the GNU Lesser General Public | |

License along with the GNU C Library; if not, see | |

<http://www.gnu.org/licenses/>. */ | |

#ifndef _BITS_WCHAR_H | |

#define _BITS_WCHAR_H 1 | |

/* The fallback definitions, for when __WCHAR_MAX__ or __WCHAR_MIN__ | |

are not defined, give the right value and type as long as both int | |

and wchar_t are 32-bit types. Adding L'\0' to a constant value | |

ensures that the type is correct; it is necessary to use (L'\0' + | |

0) rather than just L'\0' so that the type in C++ is the promoted | |

version of wchar_t rather than the distinct wchar_t type itself. | |

Because wchar_t in preprocessor #if expressions is treated as | |

intmax_t or uintmax_t, the expression (L'\0' - 1) would have the | |

wrong value for WCHAR_MAX in such expressions and so cannot be used | |

to define __WCHAR_MAX in the unsigned case. */ | |

#ifdef __WCHAR_MAX__ | |

# define __WCHAR_MAX __WCHAR_MAX__ | |

#elif L'\0' - 1 > 0 | |

# define __WCHAR_MAX (0xffffffffu + L'\0') | |

#else | |

# define __WCHAR_MAX (0x7fffffff + L'\0') | |

#endif | |

#ifdef __WCHAR_MIN__ | |

# define __WCHAR_MIN __WCHAR_MIN__ | |

#elif L'\0' - 1 > 0 | |

# define __WCHAR_MIN (L'\0' + 0) | |

#else | |

# define __WCHAR_MIN (-__WCHAR_MAX - 1) | |

#endif | |

#endif /* bits/wchar.h */ |