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