97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/misc/xf86_Util.c,v 3.7 1999/01/14 13:05:05 dawes Exp $ */
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/*
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of David Wexelblat not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. David Wexelblat makes no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/* $XConsortium: xf86_Util.c /main/5 1996/10/23 13:13:10 kaleb $ */
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/*
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* This file is for utility functions that will be shared by other pieces
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* of the system. Putting things here ensure that all the linking order
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* dependencies are dealt with, as this library will be linked in last.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <ctype.h>
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/* To prevent empty source file warnings */
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int _xf86misc;
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#if 0
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/* For use only with gcc */
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#ifdef __GNUC__
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#include "os.h"
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char *
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debug_alloca(char *file, int line, int size)
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{
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char *ptr;
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ptr = Xalloc(size);
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ErrorF("Alloc: %s line %d; ptr = 0x%x, length = %d\n", file, line,
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ptr, size);
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return ptr;
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}
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void
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debug_dealloca(char *file, int line, char *ptr)
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{
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ErrorF("Dealloc: %s line %d; ptr = 0x%x\n", file, line, ptr);
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Xfree(ptr);
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}
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#endif
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#endif
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#if defined(ISC) || defined(Lynx)
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#include <math.h>
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/* Needed for apm_driver.c */
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/* These functions are modeled after the functions inside gnu's libc */
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static double
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copysign(double x, double y)
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{
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x = fabs(x);
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return y < 0 ? - x : x;
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}
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double
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RInt(double x)
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{
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double s,t;
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const double one = 1.0;
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const static double L = 4503599627370496.0E0;
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if (x!=x)
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return(x);
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if (copysign(x,one) >= L)
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return(x);
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s = copysign(L,x);
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t = x + s;
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return (t - s);
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}
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#endif
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