diff options
| -rw-r--r-- | src/prevector.h | 15 | ||||
| -rw-r--r-- | src/serialize.h | 6 | ||||
| -rw-r--r-- | src/test/prevector_tests.cpp | 28 |
3 files changed, 46 insertions, 3 deletions
diff --git a/src/prevector.h b/src/prevector.h index ea8707389a..9d576321b6 100644 --- a/src/prevector.h +++ b/src/prevector.h @@ -378,6 +378,21 @@ public: fill(ptr, first, last); } + inline void resize_uninitialized(size_type new_size) { + // resize_uninitialized changes the size of the prevector but does not initialize it. + // If size < new_size, the added elements must be initialized explicitly. + if (capacity() < new_size) { + change_capacity(new_size); + _size += new_size - size(); + return; + } + if (new_size < size()) { + erase(item_ptr(new_size), end()); + } else { + _size += new_size - size(); + } + } + iterator erase(iterator pos) { return erase(pos, pos + 1); } diff --git a/src/serialize.h b/src/serialize.h index b001ee1324..1dc27d84eb 100644 --- a/src/serialize.h +++ b/src/serialize.h @@ -670,7 +670,7 @@ void Unserialize_impl(Stream& is, prevector<N, T>& v, const unsigned char&) while (i < nSize) { unsigned int blk = std::min(nSize - i, (unsigned int)(1 + 4999999 / sizeof(T))); - v.resize(i + blk); + v.resize_uninitialized(i + blk); is.read((char*)&v[i], blk * sizeof(T)); i += blk; } @@ -688,8 +688,8 @@ void Unserialize_impl(Stream& is, prevector<N, T>& v, const V&) nMid += 5000000 / sizeof(T); if (nMid > nSize) nMid = nSize; - v.resize(nMid); - for (; i < nMid; i++) + v.resize_uninitialized(nMid); + for (; i < nMid; ++i) Unserialize(is, v[i]); } } diff --git a/src/test/prevector_tests.cpp b/src/test/prevector_tests.cpp index 141be50f50..fc1f946bba 100644 --- a/src/test/prevector_tests.cpp +++ b/src/test/prevector_tests.cpp @@ -183,6 +183,26 @@ public: pre_vector = pre_vector_alt; } + void resize_uninitialized(realtype values) { + size_t r = values.size(); + size_t s = real_vector.size() / 2; + if (real_vector.capacity() < s + r) { + real_vector.reserve(s + r); + } + real_vector.resize(s); + pre_vector.resize_uninitialized(s); + for (auto v : values) { + real_vector.push_back(v); + } + auto p = pre_vector.size(); + pre_vector.resize_uninitialized(p + r); + for (auto v : values) { + pre_vector[p] = v; + ++p; + } + test(); + } + ~prevector_tester() { BOOST_CHECK_MESSAGE(passed, "insecure_rand: " + rand_seed.ToString()); } @@ -260,6 +280,14 @@ BOOST_AUTO_TEST_CASE(PrevectorTestInt) if (InsecureRandBits(5) == 18) { test.move(); } + if (InsecureRandBits(5) == 19) { + unsigned int num = 1 + (InsecureRandBits(4)); + std::vector<int> values(num); + for (auto &v : values) { + v = InsecureRand32(); + } + test.resize_uninitialized(values); + } } } } |