compiler/stdc/math/s_scalbln.c

   1 /*-
   2  * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
   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, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 __FBSDID("$FreeBSD: src/lib/msun/src/s_scalbln.c,v 1.2 2005/03/07 04:57:50 das Exp $");
  28
  29 #include <limits.h>
  30 #include <math.h>
  31
  32 double
  33 scalbln (double x, long n)
  34 {
  35         int in;
  36
  37         in = (int)n;
  38         if (in != n) {
  39                 if (n > 0)
  40                         in = INT_MAX;
  41                 else
  42                         in = INT_MIN;
  43         }
  44         return (scalbn(x, in));
  45 }
  46
  47 float
  48 scalblnf (float x, long n)
  49 {
  50         int in;
  51
  52         in = (int)n;
  53         if (in != n) {
  54                 if (n > 0)
  55                         in = INT_MAX;
  56                 else
  57                         in = INT_MIN;
  58         }
  59         return (scalbnf(x, in));
  60 }
  61
  62 long double
  63 scalblnl (long double x, long n)
  64 {
  65         int in;
  66
  67         in = (int)n;
  68         if (in != n) {
  69                 if (n > 0)
  70                         in = INT_MAX;
  71                 else
  72                         in = INT_MIN;
  73         }
  74         return (scalbnl(x, (int)n));
  75 }