Query: ffs
OS: posix
Section: 3p
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
FFS(3P) POSIX Programmer's Manual FFS(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.NAMEffs -- find first set bitSYNOPSIS#include <strings.h> int ffs(int i);DESCRIPTIONThe ffs() function shall find the first bit set (beginning with the least significant bit) in i, and return the index of that bit. Bits are numbered starting at one (the least significant bit).RETURN VALUEThe ffs() function shall return the index of the first bit set. If i is 0, then ffs() shall return 0.ERRORSNo errors are defined. The following sections are informative.EXAMPLESNone.APPLICATION USAGENone.RATIONALENone.FUTURE DIRECTIONSNone.SEE ALSOThe Base Definitions volume of POSIX.1-2008, <strings.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 FFS(3P)
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