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
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)