ffs()
Find the first bit set in a bit string
Synopsis:
#include <strings.h>
int ffs( int value );
Arguments:
- value
- The bit string.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The ffs() function finds the first bit set in value and returns the index of that bit. Bits are numbered starting from 1, starting at the rightmost bit.
Returns:
The index of the first bit set, or 0 if value is zero.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |