Query: feholdexcept
OS: posix
Section: 3p
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
FEHOLDEXCEPT(3P) POSIX Programmer's Manual FEHOLDEXCEPT(3P)PROLOGThis manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.NAMEfeholdexcept -- save current floating-point environmentSYNOPSIS#include <fenv.h> int feholdexcept(fenv_t *envp);DESCRIPTIONThe functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard. The feholdexcept() function shall save the current floating-point environment in the object pointed to by envp, clear the floating-point status flags, and then install a non-stop (continue on floating-point exceptions) mode, if available, for all floating-point exceptions.RETURN VALUEThe feholdexcept() function shall return zero if and only if non-stop floating-point exception handling was successfully installed.ERRORSNo errors are defined. The following sections are informative.EXAMPLESNone.APPLICATION USAGENone.RATIONALEThe feholdexcept() function should be effective on typical IEC 60559:1989 standard implementations which have the default non-stop mode and at least one other mode for trap handling or aborting. If the implementation provides only the non-stop mode, then installing the non-stop mode is trivial.FUTURE DIRECTIONSNone.SEE ALSOfegetenv(), feupdateenv() The Base Definitions volume of POSIX.1-2008, <fenv.h>COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group 2013 FEHOLDEXCEPT(3P)