popcount(3) - NetBSD Manual Pages

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POPCOUNT(3)             NetBSD Library Functions Manual            POPCOUNT(3)


NAME

     popcount, popcountl, popcountll, popcount32, popcount64 -- count number
     of bits set in a bit string


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <strings.h>

     unsigned int
     popcount(unsigned int value);

     unsigned int
     popcountl(unsigned long value);

     unsigned int
     popcountll(unsigned long long value);

     #include <stdint.h>

     unsigned int
     popcount32(uint32_t value);

     unsigned int
     popcount64(uint64_t value);


DESCRIPTION

     The popcount functions returns the number of bits set in value.


SEE ALSO

     ffs(3)


HISTORY

     The popcount(), popcountl(), popcountll(), popcount32(), and popcount64()
     functions appeared in NetBSD 6.0.

NetBSD 6.1                      August 22, 2011                     NetBSD 6.1