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Don't rely on undefined behavior

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This commit is contained in:
Vinnie Falco
2016-09-28 17:33:44 -04:00
parent 41a8342d3b
commit 58d3ea6548
1 changed files with 10 additions and 8 deletions
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18
include/beast/websocket/detail/hybi13.hpp
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@@ -23,15 +23,17 @@ template<class Gen>
std::string std::string
make_sec_ws_key(Gen& g) make_sec_ws_key(Gen& g)
{ {
union U std::array<std::uint8_t, 16> a;
for(int i = 0; i < 16; i += 4)
{ {
std::array<std::uint32_t, 4> a4; auto const v = g();
std::array<std::uint8_t, 16> a16; a[i ] = v & 0xff;
}; a[i+1] = (v >> 8) & 0xff;
U u; a[i+2] = (v >> 16) & 0xff;
for(int i = 0; i < 4; ++i) a[i+3] = (v >> 24) & 0xff;
u.a4[i] = g(); }
return beast::detail::base64_encode(u.a16.data(), u.a16.size()); return beast::detail::base64_encode(
a.data(), a.size());
} }
template<class = void> template<class = void>