Originální popis anglicky:
ffs - find first set bit
Návod, kniha: POSIX Programmer's Manual
#include <strings.h>
int ffs(int
i);
The
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).
The
ffs() function shall return the index of the first bit set. If
i is 0, then
ffs() shall return 0.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
The Base Definitions volume of IEEE Std 1003.1-2001,
<strings.h>
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
.
