76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
|
/***
|
||
|
|
*matherr.c - floating point exception handling
|
||
|
|
*
|
||
|
|
* Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
*
|
||
|
|
*Revision History:
|
||
|
|
* 8-24-91 GDP written
|
||
|
|
* 08-03-94 GJF Revised to support user-supplied version of _matherr
|
||
|
|
* in clients of msvcrt*.dll.
|
||
|
|
* 05-13-99 PML Remove Win32s
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#include <math.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
int _matherr_flag = 9876;
|
||
|
|
|
||
|
|
#if defined(CRTDLL) && !defined(_NTSDK)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Pointer to user-supplied _matherr routine if one has been supplied.
|
||
|
|
*/
|
||
|
|
int (__cdecl * pusermatherr)(struct _exception *) = NULL;
|
||
|
|
|
||
|
|
/***
|
||
|
|
*void __setusermatherr ( int (__cdecl *pf)(struct exception *) )
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* Copy pointer to user-supplied matherr routine into pusermatherr
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
* pf - pointer to an implementation of _matherr supplied by the user
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
_CRTIMP void __setusermatherr( int (__cdecl *pf)(struct _exception *) )
|
||
|
|
{
|
||
|
|
pusermatherr = pf;
|
||
|
|
_matherr_flag = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/***
|
||
|
|
*int _matherr(struct _exception *except) - handle math errors
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* Permits the user customize fp error handling by redefining this function.
|
||
|
|
*
|
||
|
|
* The default matherr does nothing and returns 0
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*******************************************************************************/
|
||
|
|
int _matherr(struct _exception *pexcept)
|
||
|
|
{
|
||
|
|
#if defined(CRTDLL) && !defined(_NTSDK)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If user has supplied a _matherr implementation, pass control to
|
||
|
|
* it and let it handle the error.
|
||
|
|
*/
|
||
|
|
if ( pusermatherr != NULL )
|
||
|
|
return pusermatherr(pexcept);
|
||
|
|
#endif
|
||
|
|
return 0;
|
||
|
|
}
|