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| author | MITSUNARI Shigeo <herumi@nifty.com> | 2017-02-14 14:51:12 +0800 |
|---|---|---|
| committer | MITSUNARI Shigeo <herumi@nifty.com> | 2017-02-14 14:51:12 +0800 |
| commit | ff70f09295e18a1d3ffdf5f324c3969d6ee6efea (patch) | |
| tree | f3074e080b794951f11c5c559bb4397a7ae37d02 /include | |
| parent | f71821a727079f9ca61ba3a53d9d89af6b4b4328 (diff) | |
| download | tangerine-mcl-ff70f09295e18a1d3ffdf5f324c3969d6ee6efea.tar.gz tangerine-mcl-ff70f09295e18a1d3ffdf5f324c3969d6ee6efea.tar.zst tangerine-mcl-ff70f09295e18a1d3ffdf5f324c3969d6ee6efea.zip | |
use std::random_device for Fp::setRand
Diffstat (limited to 'include')
| -rw-r--r-- | include/mcl/util.hpp | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/include/mcl/util.hpp b/include/mcl/util.hpp index 14468aa..62ecd9c 100644 --- a/include/mcl/util.hpp +++ b/include/mcl/util.hpp @@ -146,6 +146,26 @@ size_t getNonZeroArraySize(const T *x, size_t n) } return 1; } + +namespace impl { + +template<class T, class RG> +static void readN(T* out, size_t n, RG& rg) +{ + if (sizeof(T) == 8) { + for (size_t i = 0; i < n; i++) { + T v = rg(); + v = (v << 32) | rg(); + out[i] = v; + } + } else { + for (size_t i = 0; i < n; i++) { + out[i] = rg(); + } + } +} + +} // impl /* get random value less than in[] n = (bitSize + sizeof(T) * 8) / (sizeof(T) * 8) @@ -160,7 +180,7 @@ void getRandVal(T *out, RG& rg, const T *in, size_t bitSize) const size_t n = (bitSize + TbitSize - 1) / TbitSize; const size_t rem = bitSize & (TbitSize - 1); for (;;) { - rg.read(out, n); + impl::readN(out, n, rg); if (rem > 0) out[n - 1] &= (T(1) << rem) - 1; if (isLessArray(out, in, n)) return; } |