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Annotation of 43BSDReno/lib/libc/string/ffs.3, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1990 The Regents of the University of California.
                      2: .\" All rights reserved.
                      3: .\"
                      4: .\" This code is derived from software contributed to Berkeley by
                      5: .\" Chris Torek.
                      6: .\"
                      7: .\" Redistribution and use in source and binary forms are permitted
                      8: .\" provided that: (1) source distributions retain this entire copyright
                      9: .\" notice and comment, and (2) distributions including binaries display
                     10: .\" the following acknowledgement:  ``This product includes software
                     11: .\" developed by the University of California, Berkeley and its contributors''
                     12: .\" in the documentation or other materials provided with the distribution
                     13: .\" and in all advertising materials mentioning features or use of this
                     14: .\" software. Neither the name of the University nor the names of its
                     15: .\" contributors may be used to endorse or promote products derived
                     16: .\" from this software without specific prior written permission.
                     17: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     18: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     19: .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     20: .\"
                     21: .\"    @(#)ffs.3       5.1 (Berkeley) 5/15/90
                     22: .\"
                     23: .TH FFS 3  "May 15, 1990"
                     24: .UC 7
                     25: .SH NAME
                     26: ffs \- find first bit set in a bit string
                     27: .SH SYNOPSIS
                     28: .nf
                     29: .ft B
                     30: #include <string.h>
                     31: 
                     32: int
                     33: ffs(int value);
                     34: .ft R
                     35: .fi
                     36: .SH DESCRIPTION
                     37: .B Ffs
                     38: finds the first bit set in
                     39: .I value
                     40: and returns the index of that bit.
                     41: Bits are numbered starting from 1, starting at the right-most
                     42: bit.
                     43: A return value of 0 means that the argument was zero.
                     44: .SH SEE\ ALSO
                     45: bitstring(3)

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