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
  24         bool operator< (const Element& other) const {
  25                 return bpfen_and_move < other.bpfen_and_move;
  26         }
  27 };
  28
  29 int main(int argc, char **argv)
  30 {
  31         int num_buckets = atoi(argv[argc - 1]);
  32
  33         vector<vector<Element>> elems;
  34         elems.resize(num_buckets);
  35
  36         size_t num_elems = 0;
  37         for (int i = 1; i < argc - 2; ++i) {
  38                 FILE *fp = fopen(argv[i], "rb");
  39                 if (fp == NULL) {
  40                         perror(argv[i]);
  41                         exit(1);
  42                 }
  43                 for ( ;; ) {
  44                         int l = getc(fp);
  45                         if (l == -1) {
  46                                 break;
  47                         }
  48
  49                         string bpfen_and_move;
  50                         bpfen_and_move.resize(l);
  51                         if (fread(&bpfen_and_move[0], l, 1, fp) != 1) {
  52                                 perror("fread()");
  53                 //              exit(1);
  54                                 break;
  55                         }
  56
  57                         int r = getc(fp);
  58                         if (r == -1) {
  59                                 perror("getc()");
  60                                 //exit(1);
  61                                 break;
  62                         }
  63
  64                         int opening_num, white_elo, black_elo;
  65                         if (fread(&white_elo, sizeof(white_elo), 1, fp) != 1) {
  66                                 perror("fread()");
  67                                 //exit(1);
  68                                 break;
  69                         }
  70                         if (fread(&black_elo, sizeof(black_elo), 1, fp) != 1) {
  71                                 perror("fread()");
  72                                 //exit(1);
  73                                 break;
  74                         }
  75                         if (fread(&opening_num, sizeof(opening_num), 1, fp) != 1) {
  76                                 perror("fread()");
  77                                 //exit(1);
  78                                 break;
  79                         }
  80
  81                         int bucket = hash_key_to_bucket(bpfen_and_move.data(), bpfen_and_move.size(), num_buckets);
  82                         elems[bucket].emplace_back(Element {move(bpfen_and_move), Result(r), opening_num, white_elo, black_elo});
  83                         ++num_elems;
  84                 }
  85                 fclose(fp);
  86
  87                 printf("Read %ld elems\n", num_elems);
  88         }
  89
  90         printf("Sorting...\n");
  91         for (int i = 0; i < num_buckets; ++i) {
  92                 sort(elems[i].begin(), elems[i].end());
  93         }
  94
  95         printf("Writing SSTables...\n");
  96         for (int i = 0; i < num_buckets; ++i) {
  97                 char filename[256];
  98                 snprintf(filename, sizeof(filename), "%s.part%04d", argv[argc - 2], i);
  99
 100                 mtbl_writer_options* wopt = mtbl_writer_options_init();
 101                 mtbl_writer_options_set_compression(wopt, MTBL_COMPRESSION_SNAPPY);
 102                 mtbl_writer* mtbl = mtbl_writer_init(filename, wopt);
 103                 Count c;
 104                 for (size_t j = 0; j < elems[i].size(); ++j) {
 105                         const Element &e = elems[i][j];
 106                         if (e.result == WHITE) {
 107                                 ++c.white;
 108                         } else if (e.result == DRAW) {
 109                                 ++c.draw;
 110                         } else if (e.result == BLACK) {
 111                                 ++c.black;
 112                         }
 113                         c.opening_num = e.opening_num;
 114                         if (e.white_elo >= 100 && e.black_elo >= 100) {
 115                                 c.sum_white_elo += e.white_elo;
 116                                 c.sum_black_elo += e.black_elo;
 117                                 ++c.num_elo;
 118                         }
 119                         if (j == elems[i].size() - 1 || e.bpfen_and_move != elems[i][j + 1].bpfen_and_move) {
 120                                 mtbl_writer_add(mtbl,
 121                                         (const uint8_t *)e.bpfen_and_move.data(), e.bpfen_and_move.size(),
 122                                         (const uint8_t *)&c, sizeof(c));
 123                                 c = Count();
 124                         }
 125                 }
 126                 mtbl_writer_destroy(&mtbl);
 127         }
 128 }