--- /dev/null
+#include <stdio.h>
+#include <vector>
+#include <mtbl.h>
+#include <algorithm>
+#include <utility>
+#include <memory>
+#include <string>
+#include <string.h>
+#include "count.h"
+
+using namespace std;
+
+int main(int argc, char **argv)
+{
+ const char *hex_prefix = argv[2];
+ const int prefix_len = strlen(hex_prefix) / 2;
+ uint8_t *prefix = new uint8_t[prefix_len];
+
+ for (int i = 0; i < prefix_len; ++i) {
+ char x[3];
+ x[0] = hex_prefix[i * 2 + 0];
+ x[1] = hex_prefix[i * 2 + 1];
+ x[2] = 0;
+ int k;
+ sscanf(x, "%02x", &k);
+ prefix[i] = k;
+ }
+
+ mtbl_reader* mtbl = mtbl_reader_init(argv[1], NULL);
+ const mtbl_source *src = mtbl_reader_source(mtbl);
+ mtbl_iter *it = mtbl_source_get_prefix(src, prefix, prefix_len);
+
+ const uint8_t *key, *val;
+ size_t len_key, len_val;
+
+ while (mtbl_iter_next(it, &key, &len_key, &val, &len_val)) {
+ string move((char *)(key + prefix_len), len_key - prefix_len);
+ const Count* c = (Count *)val;
+ printf("%s %d %d %d %d %f %f\n", move.c_str(), c->white, c->draw, c->black, c->opening_num, c->avg_white_elo, c->avg_black_elo);
+ }
+}