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/********************************************************************
* Description: mathstubs.c
* Stubs for 'errno' and some error printing functions
* in the math library that don't exist in the kernel.
*
* Author: Paul_C - Derived from a file by Fred Proctor.
* Created at: Mon Feb 16 21:08:44 GMT 2004
* Computer: Morphix
* System: Linux
*
* Copyright (c) 2004 All rights reserved.
*
* Last change:
********************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/types.h> /* u_int16_t */
#include "rtapi_math.h"
int stderr;
int fputs(const char *str)
{
return 0;
}
unsigned int fwrite(const void *ptr, unsigned int size, unsigned int nobj,
void *stream)
{
return nobj;
}
static int errno;
int *__errno_location(void)
{
return &errno;
}
void __assert_fail(const char *s, const char *file, unsigned int line,
const char *function)
{
return;
}
#ifndef isnan
int isnan(double x)
{
/* Return zero if x is a real number. */
int a;
/* According to notes, a floating point number consists of 8 bytes.
Expressed as a 64 bit No. the sign will be B63. If bits 52-62 equal
0x7FF and bits 0-61 are non-zero, the number is a NaN. If bits 52-62
equal 0x7FF and bits 0-61 are zero, the number is infinite. An infinite
number will still cause errors so it should be safe to flag it as a
NaN. */
u_int16_t *c = (u_int16_t *) & x;
a = c[3] & 0x7FF0;
return (a == 0x7FF0);
}
#endif
#ifndef __isnan
int __isnan(double x)
{ /* There must be a better way of doing this !
*/
int a;
u_int16_t *c = (u_int16_t *) & x;
a = c[3] & 0x7FF0;
return (a == 0x7FF0);
}
#endif
int RTdummy(void)
{
return stderr;
}
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