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| author |   William Ahern <william@25thandClement.com>
| 2015-12-17 15:42:11 +0800 |
|---|---|---|
| committer | William Ahern <william@25thandClement.com>
| 2015-12-17 15:42:11 +0800 |
| commit | 0bb54ebc3779461101daa6d10ec24f53be540663 (patch) | |
| tree | 1602edef5399d3ac20b9d0fa22002b0434aa0330 | |
| parent | 739031aea27fa166771c76153db12c009677601b (diff) | |
| parent | fb08628f17893280da43c70f0919687feca09265 (diff) | |
| download | luaossl-0bb54ebc3779461101daa6d10ec24f53be540663.tar.gz luaossl-0bb54ebc3779461101daa6d10ec24f53be540663.tar.bz2 luaossl-0bb54ebc3779461101daa6d10ec24f53be540663.zip | |
Merge branch '19-bignum-modulo' of git://github.com/daurnimator/luaossl into daurnimator-19-bignum-modulo
| -rw-r--r-- | src/openssl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/openssl.c b/src/openssl.c index 9dbcda7..69115ce 100644 --- a/src/openssl.c +++ b/src/openssl.c @@ -1809,6 +1809,12 @@ static int bn__mod(lua_State *L) { if (!BN_mod(r, a, b, getctx(L))) return auxL_error(L, auxL_EOPENSSL, "bignum:__mod"); + /* lua has different rounding behaviour for mod than C */ + if (!BN_is_zero(r) && (BN_is_negative(a) ^ BN_is_negative(b))) { + if (!BN_add(r, r, b)) + return auxL_error(L, auxL_EOPENSSL, "bignum:__mod"); + } + return 1; } /* bn__mod() */ |