|  | =pod | 
|  |  | 
|  | =head1 NAME | 
|  |  | 
|  | BN_num_bits, BN_num_bytes, BN_num_bits_word - get BIGNUM size | 
|  |  | 
|  | =head1 SYNOPSIS | 
|  |  | 
|  | #include <openssl/bn.h> | 
|  |  | 
|  | int BN_num_bytes(const BIGNUM *a); | 
|  |  | 
|  | int BN_num_bits(const BIGNUM *a); | 
|  |  | 
|  | int BN_num_bits_word(BN_ULONG w); | 
|  |  | 
|  | =head1 DESCRIPTION | 
|  |  | 
|  | These functions return the size of a B<BIGNUM> in bytes or bits, | 
|  | and the size of an unsigned integer in bits. | 
|  |  | 
|  | BN_num_bytes() is a macro. | 
|  |  | 
|  | =head1 RETURN VALUES | 
|  |  | 
|  | The size. | 
|  |  | 
|  | =head1 SEE ALSO | 
|  |  | 
|  | L<bn(3)|bn(3)> | 
|  |  | 
|  | =head1 HISTORY | 
|  |  | 
|  | BN_num_bytes(), BN_num_bits() and BN_num_bits_word() are available in | 
|  | all versions of SSLeay and OpenSSL. | 
|  |  | 
|  | =cut |