--- /dev/null
+//#define _GLIBCXX_PARALLEL
+#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;
+
+enum Result { WHITE = 0, DRAW, BLACK };
+struct Element {
+ string bpfen_and_move;
+ Result result;
+ int opening_num, white_elo, black_elo;
+
+ bool operator< (const Element& other) const {
+ return bpfen_and_move < other.bpfen_and_move;
+ }
+};
+
+int main(int argc, char **argv)
+{
+ vector<Element> elems;
+
+ for (int i = 1; i < argc; ++i) {
+ FILE *fp = fopen(argv[i], "rb");
+ if (fp == NULL) {
+ perror(argv[i]);
+ exit(1);
+ }
+ for ( ;; ) {
+ int l = getc(fp);
+ if (l == -1) {
+ break;
+ }
+
+ string bpfen_and_move;
+ bpfen_and_move.resize(l);
+ if (fread(&bpfen_and_move[0], l, 1, fp) != 1) {
+ perror("fread()");
+ // exit(1);
+ break;
+ }
+
+ int r = getc(fp);
+ if (r == -1) {
+ perror("getc()");
+ //exit(1);
+ break;
+ }
+
+ int opening_num, white_elo, black_elo;
+ if (fread(&white_elo, sizeof(white_elo), 1, fp) != 1) {
+ perror("fread()");
+ //exit(1);
+ break;
+ }
+ if (fread(&black_elo, sizeof(black_elo), 1, fp) != 1) {
+ perror("fread()");
+ //exit(1);
+ break;
+ }
+ if (fread(&opening_num, sizeof(opening_num), 1, fp) != 1) {
+ perror("fread()");
+ //exit(1);
+ break;
+ }
+ elems.emplace_back(Element {move(bpfen_and_move), Result(r), opening_num, white_elo, black_elo});
+ }
+ fclose(fp);
+
+ printf("Read %ld elems\n", elems.size());
+ }
+
+ printf("Sorting...\n");
+ sort(elems.begin(), elems.end());
+
+ printf("Writing SSTable...\n");
+ mtbl_writer* mtbl = mtbl_writer_init("open.mtbl", NULL);
+ Count c;
+ int num_elo = 0;
+ double sum_white_elo = 0.0, sum_black_elo = 0.0;
+ for (int i = 0; i < elems.size(); ++i) {
+ if (elems[i].result == WHITE) {
+ ++c.white;
+ } else if (elems[i].result == DRAW) {
+ ++c.draw;
+ } else if (elems[i].result == BLACK) {
+ ++c.black;
+ }
+ c.opening_num = elems[i].opening_num;
+ if (elems[i].white_elo >= 100 && elems[i].black_elo >= 100) {
+ sum_white_elo += elems[i].white_elo;
+ sum_black_elo += elems[i].black_elo;
+ ++num_elo;
+ }
+ if (i == elems.size() - 1 || elems[i].bpfen_and_move != elems[i + 1].bpfen_and_move) {
+ c.avg_white_elo = sum_white_elo / num_elo;
+ c.avg_black_elo = sum_black_elo / num_elo;
+ mtbl_writer_add(mtbl,
+ (const uint8_t *)elems[i].bpfen_and_move.data(), elems[i].bpfen_and_move.size(),
+ (const uint8_t *)&c, sizeof(c));
+ c = Count();
+ num_elo = 0;
+ sum_white_elo = sum_black_elo = 0.0;
+ }
+ }
+ mtbl_writer_destroy(&mtbl);
+}