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

/* Default `INFINITY' constant. | |

Copyright (C) 2004-2014 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 _MATH_H | |

# error "Never use <bits/inf.h> directly; include <math.h> instead." | |

#endif | |

/* If we don't have real infinity, then we're supposed to produce a float | |

value that overflows at translation time, which is required to produce | |

a diagnostic. GCC's __builtin_inff produces a quite nice diagnostic | |

that tells the user that the target doesn't support infinities. */ | |

#if __GNUC_PREREQ(3,3) | |

# define INFINITY (__builtin_inff()) | |

#else | |

# define INFINITY (1e9999f) | |

#endif |