git.sesse.net Git - remoteglot-book/blob - binloader.cpp

   1 //#define _GLIBCXX_PARALLEL
   2
   3 // Usage: ./binloader IN1 IN2 IN3 ... OUT NUM_BUCKETS
   4
   5 #include <stdio.h>
   6 #include <vector>
   7 #include <mtbl.h>
   8 #include <algorithm>
   9 #include <utility>
  10 #include <memory>
  11 #include <string>
  12 #include <string.h>
  13 #include "count.h"
  14 #include "hash.h"
  15
  16 using namespace std;
  17
  18 enum Result { WHITE = 0, DRAW, BLACK };
  19 struct Element {
  20         string bpfen_and_move;
  21         Result result;
  22         int opening_num, white_elo, black_elo;
  23         time_t timestamp;
  24
  25         bool operator< (const Element& other) const {
  26                 return bpfen_and_move < other.bpfen_and_move;
  27         }
  28 };
  29
  30 int main(int argc, char **argv)
  31 {
  32         int num_buckets = atoi(argv[argc - 1]);
  33
  34         vector<vector<Element>> elems;
  35         elems.resize(num_buckets);
  36
  37         size_t num_elems = 0;
  38         for (int i = 1; i < argc - 2; ++i) {
  39                 FILE *fp = fopen(argv[i], "rb");
  40                 if (fp == NULL) {
  41                         perror(argv[i]);
  42                         exit(1);
  43                 }
  44                 for ( ;; ) {
  45                         int l = getc(fp);
  46                         if (l == -1) {
  47                                 break;
  48                         }
  49
  50                         string bpfen_and_move;
  51                         bpfen_and_move.resize(l);
  52                         if (fread(&bpfen_and_move[0], l, 1, fp) != 1) {
  53                                 perror("fread()");
  54                 //              exit(1);
  55                                 break;
  56                         }
  57
  58                         int r = getc(fp);
  59                         if (r == -1) {
  60                                 perror("getc()");
  61                                 //exit(1);
  62                                 break;
  63                         }
  64
  65                         int opening_num, white_elo, black_elo;
  66                         time_t timestamp;
  67                         if (fread(&white_elo, sizeof(white_elo), 1, fp) != 1) {
  68                                 perror("fread()");
  69                                 //exit(1);
  70                                 break;
  71                         }
  72                         if (fread(&black_elo, sizeof(black_elo), 1, fp) != 1) {
  73                                 perror("fread()");
  74                                 //exit(1);
  75                                 break;
  76                         }
  77                         if (fread(&opening_num, sizeof(opening_num), 1, fp) != 1) {
  78                                 perror("fread()");
  79                                 //exit(1);
  80                                 break;
  81                         }
  82                         if (fread(&timestamp, sizeof(timestamp), 1, fp) != 1) {
  83                                 perror("fread()");
  84                                 //exit(1);
  85                                 break;
  86                         }
  87
  88                         int bucket = hash_key_to_bucket(bpfen_and_move.data(), bpfen_and_move.size(), num_buckets);
  89                         elems[bucket].emplace_back(Element {move(bpfen_and_move), Result(r), opening_num, white_elo, black_elo, timestamp});
  90                         ++num_elems;
  91                 }
  92                 fclose(fp);
  93
  94                 printf("Read %ld elems\n", num_elems);
  95         }
  96
  97         printf("Sorting...\n");
  98         for (int i = 0; i < num_buckets; ++i) {
  99                 sort(elems[i].begin(), elems[i].end());
 100         }
 101
 102         printf("Writing SSTables...\n");
 103         for (int i = 0; i < num_buckets; ++i) {
 104                 char filename[256];
 105                 snprintf(filename, sizeof(filename), "%s.part%04d", argv[argc - 2], i);
 106
 107                 mtbl_writer_options* wopt = mtbl_writer_options_init();
 108                 mtbl_writer_options_set_compression(wopt, MTBL_COMPRESSION_SNAPPY);
 109                 mtbl_writer* mtbl = mtbl_writer_init(filename, wopt);
 110                 Count c;
 111                 for (size_t j = 0; j < elems[i].size(); ++j) {
 112                         const Element &e = elems[i][j];
 113                         if (e.result == WHITE) {
 114                                 ++c.white;
 115                         } else if (e.result == DRAW) {
 116                                 ++c.draw;
 117                         } else if (e.result == BLACK) {
 118                                 ++c.black;
 119                         }
 120                         if (e.white_elo >= 100 && e.black_elo >= 100) {
 121                                 c.sum_white_elo += e.white_elo;
 122                                 c.sum_black_elo += e.black_elo;
 123                                 ++c.num_elo;
 124                         }
 125                         if (c.first_timestamp == DUMMY_TIMESTAMP ||
 126                             e.timestamp < c.first_timestamp) {
 127                                 c.first_timestamp = e.timestamp;
 128                                 c.opening_num = e.opening_num;
 129                         }
 130                         if (j == elems[i].size() - 1 || e.bpfen_and_move != elems[i][j + 1].bpfen_and_move) {
 131                                 mtbl_writer_add(mtbl,
 132                                         (const uint8_t *)e.bpfen_and_move.data(), e.bpfen_and_move.size(),
 133                                         (const uint8_t *)&c, sizeof(c));
 134                                 c = Count();
 135                         }
 136                 }
 137                 mtbl_writer_destroy(&mtbl);
 138         }
 139 }