mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-28 09:03:01 +00:00
62 lines
1.6 KiB
Plaintext
62 lines
1.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic
|
|
functions on BIGNUMs with integers
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/bn.h>
|
|
|
|
int BN_add_word(BIGNUM *a, BN_ULONG w);
|
|
|
|
int BN_sub_word(BIGNUM *a, BN_ULONG w);
|
|
|
|
int BN_mul_word(BIGNUM *a, BN_ULONG w);
|
|
|
|
BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
|
|
|
|
BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
These functions perform arithmetic operations on BIGNUMs with unsigned
|
|
integers. They are much more efficient than the normal BIGNUM
|
|
arithmetic operations.
|
|
|
|
BN_add_word() adds B<w> to B<a> (C<a+=w>).
|
|
|
|
BN_sub_word() subtracts B<w> from B<a> (C<a-=w>).
|
|
|
|
BN_mul_word() multiplies B<a> and B<w> (C<a*=w>).
|
|
|
|
BN_div_word() divides B<a> by B<w> (C<a/=w>) and returns the remainder.
|
|
|
|
BN_mod_word() returns the remainder of B<a> divided by B<w> (C<a%w>).
|
|
|
|
For BN_div_word() and BN_mod_word(), B<w> must not be 0.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
BN_add_word(), BN_sub_word() and BN_mul_word() return 1 for success, 0
|
|
on error. The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
|
|
|
|
BN_mod_word() and BN_div_word() return B<a>%B<w> on success and
|
|
B<(BN_ULONG)-1> if an error occurred.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<bn(3)|bn(3)>, L<ERR_get_error(3)|ERR_get_error(3)>, L<BN_add(3)|BN_add(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
BN_add_word() and BN_mod_word() are available in all versions of
|
|
SSLeay and OpenSSL. BN_div_word() was added in SSLeay 0.8, and
|
|
BN_sub_word() and BN_mul_word() in SSLeay 0.9.0.
|
|
|
|
Before 0.9.8a the return value for BN_div_word() and BN_mod_word()
|
|
in case of an error was 0.
|
|
|
|
=cut
|