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-rw-r--r--tests/difficulty/difficulty.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/tests/difficulty/difficulty.cpp b/tests/difficulty/difficulty.cpp
new file mode 100644
index 000000000..85c469391
--- /dev/null
+++ b/tests/difficulty/difficulty.cpp
@@ -0,0 +1,55 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <cstddef>
+#include <cstdint>
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+#include "cryptonote_config.h"
+#include "cryptonote_core/difficulty.h"
+
+using namespace std;
+
+#define DEFAULT_TEST_DIFFICULTY_TARGET 120
+
+int main(int argc, char *argv[]) {
+ if (argc != 2) {
+ cerr << "Wrong arguments" << endl;
+ return 1;
+ }
+ vector<uint64_t> timestamps, cumulative_difficulties;
+ fstream data(argv[1], fstream::in);
+ data.exceptions(fstream::badbit);
+ data.clear(data.rdstate());
+ uint64_t timestamp, difficulty, cumulative_difficulty = 0;
+ size_t n = 0;
+ while (data >> timestamp >> difficulty) {
+ size_t begin, end;
+ if (n < DIFFICULTY_WINDOW + DIFFICULTY_LAG) {
+ begin = 0;
+ end = min(n, (size_t) DIFFICULTY_WINDOW);
+ } else {
+ end = n - DIFFICULTY_LAG;
+ begin = end - DIFFICULTY_WINDOW;
+ }
+ uint64_t res = cryptonote::next_difficulty(
+ vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
+ vector<uint64_t>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
+ if (res != difficulty) {
+ cerr << "Wrong difficulty for block " << n << endl
+ << "Expected: " << difficulty << endl
+ << "Found: " << res << endl;
+ return 1;
+ }
+ timestamps.push_back(timestamp);
+ cumulative_difficulties.push_back(cumulative_difficulty += difficulty);
+ ++n;
+ }
+ if (!data.eof()) {
+ data.clear(fstream::badbit);
+ }
+ return 0;
+}