Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

ffs64(3) [netbsd man page]

FFS32(3)						   BSD Library Functions Manual 						  FFS32(3)

NAME
ffs32, ffs64, fls32, fls64 -- find first or last bit set SYNOPSIS
#include <sys/bitops.h> int ffs32(uint32_t n); int ffs64(uint64_t n); int fls32(uint32_t n); int fls64(uint64_t n); DESCRIPTION
The ffs32() and ffs64() functions find the first bit set in n and return the index of that bit. Conversely, the fls32() and fls64() func- tions find the last bit set in n, returning the index of the bit. The search always starts from the bit 1 (the least significant bit). If the argument n is zero, each function returns zero. IMPLEMENTATION NOTES
The described functions are implemented as static inline functions in the <sys/bitops.h> header. The standard C library includes a more por- table ffs(3) for user applications. EXAMPLES
In the following example f = 3 and l = 7: uint32_t n = 0x44; /* 01000100 */ int f, l; f = ffs32(n); l = fls32(n); SEE ALSO
bitops(3), bits(3), bitstring(3), ffs(3), setbit(9) HISTORY
These functions first appeared in NetBSD 5.0. BSD
April 8, 2011 BSD

Check Out this Related Man Page

FFS32(3)						   BSD Library Functions Manual 						  FFS32(3)

NAME
ffs32, ffs64, fls32, fls64 -- find first or last bit set SYNOPSIS
#include <sys/bitops.h> int ffs32(uint32_t n); int ffs64(uint64_t n); int fls32(uint32_t n); int fls64(uint64_t n); DESCRIPTION
The ffs32() and ffs64() functions find the first bit set in n and return the index of that bit. Conversely, the fls32() and fls64() func- tions find the last bit set in n, returning the index of the bit. The search always starts from the bit 1 (the least significant bit). If the argument n is zero, each function returns zero. IMPLEMENTATION NOTES
The described functions are implemented as static inline functions in the <sys/bitops.h> header. The standard C library includes a more por- table ffs(3) for user applications. EXAMPLES
In the following example f = 3 and l = 7: uint32_t n = 0x44; /* 01000100 */ int f, l; f = ffs32(n); l = fls32(n); SEE ALSO
bitops(3), bits(3), bitstring(3), ffs(3), setbit(9) HISTORY
These functions first appeared in NetBSD 5.0. BSD
April 8, 2011 BSD
Man Page

6 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

32 / 64 bit

How to find whether the Unix is 32 or 64 bit in a Solaris machine Thanks LS1429 (4 Replies)
Discussion started by: ls1429
4 Replies

2. UNIX for Dummies Questions & Answers

hp-ux

hi, I have got a simple doubt, How to find whether i am working on 32 bit hp-ux or 64 bit hp-ux? is their any system call by which i can print it in my 'c ' code. Thanx in advance. (2 Replies)
Discussion started by: sushaga
2 Replies

3. UNIX for Dummies Questions & Answers

Command to find 32/64 bit in Linux

Hi, Can somebody tell me which command will help me find whether the OS is 32 bit or 64 bit. Regards, Giridhara Babu Tadikonda. (3 Replies)
Discussion started by: giribt
3 Replies

4. AIX

AIX OS bit info

Hi All, How do i find a bit info whether 32 bit or 64 bit of AIX operating system? Please help R (6 Replies)
Discussion started by: tenderfoot
6 Replies

5. UNIX for Dummies Questions & Answers

java1.6 for rhel5 32 bit

where can I download java1.6 for rhel5 32 bit. find it hard to search on the net. thanks (3 Replies)
Discussion started by: lhareigh890
3 Replies

6. Shell Programming and Scripting

Command to find 32/64 bit in Linux

Hi, Can somebody tell me which command will help me find whether the OS is 32 bit or 64 bit. OS is LInux Thanks (3 Replies)
Discussion started by: aish11
3 Replies