fegetexceptflag, fesetexceptflag: získat a nastavit stavové příznaky s pohyblivou řádovou čárkou

Originální popis anglicky: fegetexceptflag, fesetexceptflag - get and set floating-point status flags

Návod, kniha: POSIX Programmer's Manual

STRUČNĚ

#include <fenv.h> int fegetexceptflag(fexcept_t * flagp, int excepts); int fesetexceptflag(const fexcept_t * flagp, int excepts);

POPIS / INSTRUKCE

The fegetexceptflag() function shall attempt to store an implementation-defined representation of the states of the floating-point status flags indicated by the argument excepts in the object pointed to by the argument flagp. The fesetexceptflag() function shall attempt to set the floating-point status flags indicated by the argument excepts to the states stored in the object pointed to by flagp. The value pointed to by flagp shall have been set by a previous call to fegetexceptflag() whose second argument represented at least those floating-point exceptions represented by the argument excepts. This function does not raise floating-point exceptions, but only sets the state of the flags.

NÁVRATOVÁ HODNOTA

If the representation was successfully stored, fegetexceptflag() shall return zero. Otherwise, it shall return a non-zero value. If the excepts argument is zero or if all the specified exceptions were successfully set, fesetexceptflag() shall return zero. Otherwise, it shall return a non-zero value.

CHYBY / ERRORY

No errors are defined. The following sections are informative.

PŘÍKLADY POUŽITÍ

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SOUVISEJÍCÍ

feclearexcept() , feraiseexcept() , fetestexcept() , the Base Definitions volume of IEEE Std 1003.1-2001, <fenv.h>

COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .