+
−#include "fuzzutil.h"
+
−
+
−#include <cstring>
+
−#include <utility>
+
−
+
−contrib::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size)
+
−{
+
−	if (!Size) {
+
−		return contrib::nullopt;
+
−	}
+
−	// figure out a random point in [0, Size] to split our input.
+
−	size_t left_size = (Data[0] / 255.0) * (Size - 1);
+
−
+
−	// Copy inputs to new allocations so if bdiff over-reads
+
−	// AddressSanitizer can detect it.
+
−	std::unique_ptr<char[]> left(new char[left_size]);
+
−	std::memcpy(left.get(), Data + 1, left_size);
+
−	// right starts at the next byte after left ends
+
−	size_t right_size = Size - (left_size + 1);
+
−	std::unique_ptr<char[]> right(new char[right_size]);
+
−	std::memcpy(right.get(), Data + 1 + left_size, right_size);
+
−	LOG(2) << "inputs are  " << left_size << " and " << right_size
+
−	       << " bytes" << std::endl;
+
−	two_inputs result = {std::move(right), right_size, std::move(left),
+
−	                     left_size};
+
−	return result;
+
−}