| /*- |

| * Copyright (c) 2005 David Schultz <das@FreeBSD.ORG> |

| * 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. |

| * |

| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR OR CONTRIBUTORS BE LIABLE |

| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |

| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |

| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |

| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |

| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |

| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |

| * SUCH DAMAGE. |

| */ |

| |

| #include <sys/cdefs.h> |

| #include <limits.h> |

| #include <fenv.h> |

| #include <math.h> |

| |

| #ifndef type |

| /* __FBSDID("$FreeBSD: src/lib/msun/src/s_lround.c,v 1.2 2005/04/08 00:52:16 das Exp $"); */ |

| #define type double |

| #define roundit round |

| #define dtype long |

| #define DTYPE_MIN LONG_MIN |

| #define DTYPE_MAX LONG_MAX |

| #define fn lround |

| #endif |

| |

| /* |

| * If type has more precision than dtype, the endpoints dtype_(min|max) are |

| * of the form xxx.5; they are "out of range" because lround() rounds away |

| * from 0. On the other hand, if type has less precision than dtype, then |

| * all values that are out of range are integral, so we might as well assume |

| * that everything is in range. At compile time, INRANGE(x) should reduce to |

| * two floating-point comparisons in the former case, or TRUE otherwise. |

| */ |

| static const type dtype_min = DTYPE_MIN - 0.5; |

| static const type dtype_max = DTYPE_MAX + 0.5; |

| #define INRANGE(x) (dtype_max - DTYPE_MAX != 0.5 || \ |

| ((x) > dtype_min && (x) < dtype_max)) |

| |

| dtype |

| fn(type x) |

| { |

| |

| if (INRANGE(x)) { |

| x = roundit(x); |

| return ((dtype)x); |

| } else { |

| feraiseexcept(FE_INVALID); |

| return (DTYPE_MAX); |

| } |

| } |