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       1                 :             : /*-
       2                 :             :  * Copyright (c) 2003, Steven G. Kargl
       3                 :             :  * All rights reserved.
       4                 :             :  *
       5                 :             :  * Redistribution and use in source and binary forms, with or without
       6                 :             :  * modification, are permitted provided that the following conditions
       7                 :             :  * are met:
       8                 :             :  * 1. Redistributions of source code must retain the above copyright
       9                 :             :  *    notice unmodified, this list of conditions, and the following
      10                 :             :  *    disclaimer.
      11                 :             :  * 2. Redistributions in binary form must reproduce the above copyright
      12                 :             :  *    notice, this list of conditions and the following disclaimer in the
      13                 :             :  *    documentation and/or other materials provided with the distribution.
      14                 :             :  *
      15                 :             :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      16                 :             :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      17                 :             :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      18                 :             :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      19                 :             :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      20                 :             :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      21                 :             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      22                 :             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      23                 :             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      24                 :             :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      25                 :             :  */
      26                 :             : 
      27                 :             : #include "cdefs-compat.h"
      28                 :             : //__FBSDID("$FreeBSD: src/lib/msun/src/s_roundf.c,v 1.4 2005/12/02 13:45:06 bde Exp $");
      29                 :             : 
      30                 :             : #include <openlibm_math.h>
      31                 :             : 
      32                 :             : #include "math_private.h"
      33                 :             : 
      34                 :             : OLM_DLLEXPORT float
      35                 :          45 : roundf(float x)
      36                 :             : {
      37                 :             :         float t;
      38                 :             : 
      39         [ -  + ]:          45 :         if (!isfinite(x))
      40                 :           0 :                 return (x);
      41                 :             : 
      42         [ +  + ]:          45 :         if (x >= 0.0) {
      43                 :          30 :                 t = floorf(x);
      44         [ +  + ]:          30 :                 if (t - x <= -0.5)
      45                 :          12 :                         t += 1.0;
      46                 :          30 :                 return (t);
      47                 :             :         } else {
      48                 :          15 :                 t = floorf(-x);
      49         [ +  + ]:          15 :                 if (t + x <= -0.5)
      50                 :          12 :                         t += 1.0;
      51                 :          15 :                 return (-t);
      52                 :             :         }
      53                 :             : }