- /* 
-   Copyright (c) 2011-2013 Ronald de Man 
-   This file may be redistributed and/or modified without restrictions. 
-   
-   tbcore.c contains engine-independent routines of the tablebase probing code. 
-   This file should not need to much adaptation to add tablebase probing to 
-   a particular engine, provided the engine is written in C or C++. 
- */ 
-   
- #include <stdio.h> 
- #include <stdint.h> 
- #include <stdlib.h> 
- #include <string.h> 
- #include <sys/stat.h> 
- #include <fcntl.h> 
- #include <mutex> 
- #include <atomic> 
- #ifndef _WIN32 
- #include <unistd.h> 
- #include <sys/mman.h> 
- #endif 
- #include "rtb-core.hpp" 
-   
-   
- #define TBMAX_PIECE 254 
- #define TBMAX_PAWN 256 
- #define HSHMAX 4 
-   
- #define Swap(a,b) {int tmp=a;a=b;b=tmp;} 
-   
- #define TB_PAWN 1 
- #define TB_KNIGHT 2 
- #define TB_BISHOP 3 
- #define TB_ROOK 4 
- #define TB_QUEEN 5 
- #define TB_KING 6 
-   
- #define TB_WPAWN TB_PAWN 
- #define TB_BPAWN (TB_PAWN | 8) 
-   
- static std::mutex TB_mutex; 
-   
- static bool initialized = false; 
- static int num_paths = 0; 
- static char *path_string = NULL; 
- static char **paths = NULL; 
-   
- static int TBnum_piece, TBnum_pawn; 
- static struct TBEntry_piece TB_piece[TBMAX_PIECE]; 
- static struct TBEntry_pawn TB_pawn[TBMAX_PAWN]; 
-   
- static struct TBHashEntry WDL_hash[1 << TBHASHBITS][HSHMAX]; 
- static struct DTZTableEntry DTZ_hash[1 << TBHASHBITS][HSHMAX]; 
-   
- static void init_indices(void); 
- static uint64_t calc_key_from_pcs(const int *pcs, bool mirror); 
- static void free_wdl_entry(struct TBEntry *entry); 
- static void free_dtz_entry(struct TBEntry *entry); 
-   
- static FD open_tb(const char *str, const char *suffix) 
- { 
-     for (int  i = 0; i < num_paths; i++) { 
-         std::string file(paths[i]); 
-         file += '/'; 
-         file += str; 
-         file += suffix; 
- #ifndef _WIN32 
-         FD fd = open(file.c_str(), O_RDONLY); 
- #else 
-         FD fd = CreateFile(file.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, 
-                            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 
- #endif 
-         if (fd != FD_ERR) return fd; 
-     } 
-     return FD_ERR; 
- } 
-   
- static void close_tb(FD fd) 
- { 
- #ifndef _WIN32 
-     close(fd); 
- #else 
-     CloseHandle(fd); 
- #endif 
- } 
-   
- static char *map_file(const char *name, const char *suffix, uint64_t *mapping) 
- { 
-     FD fd = open_tb(name, suffix); 
-     if (fd == FD_ERR) 
-         return NULL; 
- #ifndef _WIN32 
-     struct stat statbuf; 
-     fstat(fd, &statbuf); 
-     *mapping = statbuf.st_size; 
-     char *data = (char *)mmap(NULL, statbuf.st_size, PROT_READ, 
-                               MAP_SHARED, fd, 0); 
-     if (data == (char *)(-1)) { 
-         std::cout << "Could not mmap() " << name << std::endl; 
-         close_tb(fd); 
-         return NULL; 
-     } 
- #else 
-     DWORD size_low, size_high; 
-     size_low = GetFileSize(fd, &size_high); 
-     //  *size = ((uint64_t)size_high) << 32 | ((uint64_t)size_low); 
-     HANDLE map = CreateFileMapping(fd, NULL, PAGE_READONLY, size_high, size_low, 
-                                    NULL); 
-     if (map == NULL) { 
-         std::cout << "CreateFileMapping() failed" << std::endl; 
-         close_tb(fd); 
-         return NULL; 
-     } 
-     *mapping = (uint64_t)map; 
-     char *data = (char *)MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0); 
-     if (data == NULL) { 
-         std::cout << "MapViewOfFile() failed, name = " << name << suffix << ", error = " << GetLastError() << std::endl; 
-         close_tb(fd); 
-         return NULL; 
-     } 
- #endif 
-     close_tb(fd); 
-     return data; 
- } 
-   
- #ifndef _WIN32 
- static void unmap_file(char *data, uint64_t size) 
- { 
-     if (!data) return; 
-     munmap(data, size); 
- } 
- #else 
- static void unmap_file(char *data, uint64_t mapping) 
- { 
-     if (!data) return; 
-     UnmapViewOfFile(data); 
-     CloseHandle((HANDLE)mapping); 
- } 
- #endif 
-   
- static void add_to_hash(struct TBEntry *ptr, uint64_t key) 
- { 
-     int i, hshidx; 
-   
-     hshidx = key >> (64 - TBHASHBITS); 
-     i = 0; 
-     while (i < HSHMAX && WDL_hash[hshidx][i].ptr) 
-         i++; 
-     assert(i < HSHMAX); 
-     WDL_hash[hshidx][i].key = key; 
-     WDL_hash[hshidx][i].ptr = ptr; 
- } 
-   
- static void add_to_dtz_hash(uint64_t key1, uint64_t key2) 
- { 
-     int i, hshidx; 
-   
-     hshidx = key1 >> (64 - TBHASHBITS); 
-     i = 0; 
-     while (i < HSHMAX && DTZ_hash[hshidx][i].key1) 
-         i++; 
-     assert(i < HSHMAX); 
-     DTZ_hash[hshidx][i].key1 = key1; 
-     DTZ_hash[hshidx][i].key2 = key2; 
-     DTZ_hash[hshidx][i].entry = NULL; 
- } 
-   
- static char pchr[] = {'K', 'Q', 'R', 'B', 'N', 'P'}; 
-   
- static void init_tb(char *str) 
- { 
-     FD fd; 
-     struct TBEntry *entry; 
-     int i, j, pcs[16]; 
-     uint64_t key, key2; 
-     int color; 
-     char *s; 
-   
-     fd = open_tb(str, WDLSUFFIX); 
-     if (fd == FD_ERR) return; 
-     close_tb(fd); 
-   
-     for (i = 0; i < 16; i++) 
-         pcs[i] = 0; 
-     color = 0; 
-     for (s = str; *s; s++) 
-         switch (*s) { 
-         case 'P': 
-             pcs[TB_PAWN | color]++; 
-             break; 
-         case 'N': 
-             pcs[TB_KNIGHT | color]++; 
-             break; 
-         case 'B': 
-             pcs[TB_BISHOP | color]++; 
-             break; 
-         case 'R': 
-             pcs[TB_ROOK | color]++; 
-             break; 
-         case 'Q': 
-             pcs[TB_QUEEN | color]++; 
-             break; 
-         case 'K': 
-             pcs[TB_KING | color]++; 
-             break; 
-         case 'v': 
-             color = 0x08; 
-             break; 
-         } 
-     for (i = 0; i < 8; i++) 
-         if (pcs[i] != pcs[i+8]) 
-             break; 
-     key = calc_key_from_pcs(pcs, false); 
-     key2 = calc_key_from_pcs(pcs, true); 
-     if (pcs[TB_WPAWN] + pcs[TB_BPAWN] == 0) { 
-         assert(TBnum_piece < TBMAX_PIECE); 
-         entry = (struct TBEntry *)&TB_piece[TBnum_piece++]; 
-     } else { 
-         assert(TBnum_pawn < TBMAX_PAWN); 
-         entry = (struct TBEntry *)&TB_pawn[TBnum_pawn++]; 
-     } 
-     entry->key = key; 
-     entry->ready = 0; 
-     entry->num = 0; 
-     for (i = 0; i < 16; i++) 
-         entry->num += pcs[i]; 
-     entry->symmetric = (key == key2); 
-     entry->has_pawns = (pcs[TB_WPAWN] + pcs[TB_BPAWN] > 0); 
-     if (entry->num > Syzygy::TBLargest) 
-         Syzygy::TBLargest = entry->num; 
-   
-     if (entry->has_pawns) { 
-         struct TBEntry_pawn *ptr = (struct TBEntry_pawn *)entry; 
-         ptr->pawns[0] = pcs[TB_WPAWN]; 
-         ptr->pawns[1] = pcs[TB_BPAWN]; 
-         if (pcs[TB_BPAWN] > 0 
-             && (pcs[TB_WPAWN] == 0 || pcs[TB_BPAWN] < pcs[TB_WPAWN])) { 
-             ptr->pawns[0] = pcs[TB_BPAWN]; 
-             ptr->pawns[1] = pcs[TB_WPAWN]; 
-         } 
-     } else { 
-         struct TBEntry_piece *ptr = (struct TBEntry_piece *)entry; 
-         for (i = 0, j = 0; i < 16; i++) 
-             if (pcs[i] == 1) j++; 
-         if (j >= 3) ptr->enc_type = 0; 
-         else if (j == 2) ptr->enc_type = 2; 
-         else { /* only for suicide */ 
-             j = 16; 
-             for (i = 0; i < 16; i++) { 
-                 if (pcs[i] < j && pcs[i] > 1) j = pcs[i]; 
-                 ptr->enc_type = 1 + j; 
-             } 
-         } 
-     } 
-     add_to_hash(entry, key); 
-     if (key2 != key) add_to_hash(entry, key2); 
-     add_to_dtz_hash(key, key2); 
- } 
-   
- void Syzygy::init(const std::string& path) 
- { 
-     char str[16]; 
-     int i, j, k, l; 
-   
-     { // The probing code currently expects a little-endian architecture 
-         static_assert(sizeof(uint32_t) == 4, "Unsupported architecture"); 
-         uint32_t test = 0x01020304; 
-         unsigned char* p = (unsigned char*)&test; 
-         if (p[0] != 4 || p[1] != 3 || p[2] != 2 || p[3] != 1) 
-             return; 
-     } 
-   
-     if (initialized) { 
-         free(path_string); path_string = NULL; 
-         free(paths); paths = NULL; 
-         struct TBEntry *entry; 
-         for (i = 0; i < TBnum_piece; i++) { 
-             entry = (struct TBEntry *)&TB_piece[i]; 
-             free_wdl_entry(entry); 
-         } 
-         for (i = 0; i < TBnum_pawn; i++) { 
-             entry = (struct TBEntry *)&TB_pawn[i]; 
-             free_wdl_entry(entry); 
-         } 
-         for (i = 0; i < (1 << TBHASHBITS); i++) 
-             for (j = 0; j < HSHMAX; j++) { 
-                 if ((void*) DTZ_hash[i][j].entry) { // Pierre-Marie Baty -- added type cast 
-                     free_dtz_entry(DTZ_hash[i][j].entry); 
-                     DTZ_hash[i][j].entry = NULL; 
-                 } 
-             } 
-         TBnum_piece = TBnum_pawn = 0; 
-         TBLargest = 0; 
-     } else { 
-         init_indices(); 
-         initialized = true; 
-     } 
-   
-     const char *p = path.c_str(); 
-     if (strlen(p) == 0) 
-         return; 
-     path_string = (char *)malloc(strlen(p) + 1); 
-     strcpy_s(path_string, strlen(p) + 1, p); // Pierre-Marie Baty -- use strcpy_s() instead of strcpy 
-     num_paths = 0; 
-     for (i = 0;; i++) { 
-         if (path_string[i] && path_string[i] != SEP_CHAR) 
-             num_paths++; 
-         while (path_string[i] && path_string[i] != SEP_CHAR) 
-             i++; 
-         if (!path_string[i]) break; 
-         path_string[i] = 0; 
-     } 
-     paths = (char **)malloc(num_paths * sizeof(char *)); 
-     for (i = j = 0; i < num_paths; i++) { 
-         while (!path_string[j]) j++; 
-         paths[i] = &path_string[j]; 
-         while (path_string[j]) j++; 
-     } 
-   
-     for (i = 0; i < (1 << TBHASHBITS); i++) 
-         for (j = 0; j < HSHMAX; j++) { 
-             WDL_hash[i][j].key = 0ULL; 
-             WDL_hash[i][j].ptr = NULL; 
-         } 
-   
-     for (i = 0; i < (1 << TBHASHBITS); i++) 
-         for (j = 0; j < HSHMAX; j++) { 
-             DTZ_hash[i][j].key1 = 0ULL; 
-             DTZ_hash[i][j].key2 = 0ULL; 
-             DTZ_hash[i][j].entry = NULL; 
-         } 
-   
-     for (i = 1; i < 6; i++) { 
-         sprintf_s(str, sizeof(str), "K%cvK", pchr[i]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-         init_tb(str); 
-     } 
-   
-     for (i = 1; i < 6; i++) 
-         for (j = i; j < 6; j++) { 
-             sprintf_s(str, sizeof(str), "K%cvK%c", pchr[i], pchr[j]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-             init_tb(str); 
-         } 
-   
-     for (i = 1; i < 6; i++) 
-         for (j = i; j < 6; j++) { 
-             sprintf_s(str, sizeof(str), "K%c%cvK", pchr[i], pchr[j]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-             init_tb(str); 
-         } 
-   
-     for (i = 1; i < 6; i++) 
-         for (j = i; j < 6; j++) 
-             for (k = 1; k < 6; k++) { 
-                 sprintf_s(str, sizeof(str), "K%c%cvK%c", pchr[i], pchr[j], pchr[k]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-                 init_tb(str); 
-             } 
-   
-     for (i = 1; i < 6; i++) 
-         for (j = i; j < 6; j++) 
-             for (k = j; k < 6; k++) { 
-                 sprintf_s(str, sizeof(str), "K%c%c%cvK", pchr[i], pchr[j], pchr[k]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-                 init_tb(str); 
-             } 
-   
-     // 6-piece tables are only supported for 64-bit, because tables are mmap()ed into memory 
-     if (sizeof(char*) >= 8) { 
-         for (i = 1; i < 6; i++) 
-             for (j = i; j < 6; j++) 
-                 for (k = i; k < 6; k++) 
-                     for (l = (i == k) ? j : k; l < 6; l++) { 
-                         sprintf_s(str, sizeof(str), "K%c%cvK%c%c", pchr[i], pchr[j], pchr[k], pchr[l]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-                         init_tb(str); 
-                     } 
-   
-         for (i = 1; i < 6; i++) 
-             for (j = i; j < 6; j++) 
-                 for (k = j; k < 6; k++) 
-                     for (l = 1; l < 6; l++) { 
-                         sprintf_s(str, sizeof(str), "K%c%c%cvK%c", pchr[i], pchr[j], pchr[k], pchr[l]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-                         init_tb(str); 
-                     } 
-   
-         for (i = 1; i < 6; i++) 
-             for (j = i; j < 6; j++) 
-                 for (k = j; k < 6; k++) 
-                     for (l = k; l < 6; l++) { 
-                         sprintf_s(str, sizeof(str), "K%c%c%c%cvK", pchr[i], pchr[j], pchr[k], pchr[l]); // Pierre-Marie Baty -- using sprintf_s() instead of sprintf 
-                         init_tb(str); 
-                     } 
-     } 
-   
-     std::cout << "info string Found " << (TBnum_piece + TBnum_pawn) << " syzygy tablebases" << std::endl; 
- } 
-   
- static const signed char offdiag[] = { 
-     0,-1,-1,-1,-1,-1,-1,-1, 
-     1, 0,-1,-1,-1,-1,-1,-1, 
-     1, 1, 0,-1,-1,-1,-1,-1, 
-     1, 1, 1, 0,-1,-1,-1,-1, 
-     1, 1, 1, 1, 0,-1,-1,-1, 
-     1, 1, 1, 1, 1, 0,-1,-1, 
-     1, 1, 1, 1, 1, 1, 0,-1, 
-     1, 1, 1, 1, 1, 1, 1, 0 
- }; 
-   
- static const ubyte triangle[] = { 
-     6, 0, 1, 2, 2, 1, 0, 6, 
-     0, 7, 3, 4, 4, 3, 7, 0, 
-     1, 3, 8, 5, 5, 8, 3, 1, 
-     2, 4, 5, 9, 9, 5, 4, 2, 
-     2, 4, 5, 9, 9, 5, 4, 2, 
-     1, 3, 8, 5, 5, 8, 3, 1, 
-     0, 7, 3, 4, 4, 3, 7, 0, 
-     6, 0, 1, 2, 2, 1, 0, 6 
- }; 
-   
- static const ubyte invtriangle[] = { 
-     1, 2, 3, 10, 11, 19, 0, 9, 18, 27 
- }; 
-   
- static const ubyte invdiag[] = { 
-     0, 9, 18, 27, 36, 45, 54, 63, 
-     7, 14, 21, 28, 35, 42, 49, 56 
- }; 
-   
- static const ubyte flipdiag[] = { 
-     0,  8, 16, 24, 32, 40, 48, 56, 
-     1,  9, 17, 25, 33, 41, 49, 57, 
-     2, 10, 18, 26, 34, 42, 50, 58, 
-     3, 11, 19, 27, 35, 43, 51, 59, 
-     4, 12, 20, 28, 36, 44, 52, 60, 
-     5, 13, 21, 29, 37, 45, 53, 61, 
-     6, 14, 22, 30, 38, 46, 54, 62, 
-     7, 15, 23, 31, 39, 47, 55, 63 
- }; 
-   
- static const ubyte lower[] = { 
-     28,  0,  1,  2,  3,  4,  5,  6, 
-     0, 29,  7,  8,  9, 10, 11, 12, 
-     1,  7, 30, 13, 14, 15, 16, 17, 
-     2,  8, 13, 31, 18, 19, 20, 21, 
-     3,  9, 14, 18, 32, 22, 23, 24, 
-     4, 10, 15, 19, 22, 33, 25, 26, 
-     5, 11, 16, 20, 23, 25, 34, 27, 
-     6, 12, 17, 21, 24, 26, 27, 35 
- }; 
-   
- static const ubyte diag[] = { 
-     0,  0,  0,  0,  0,  0,  0,  8, 
-     0,  1,  0,  0,  0,  0,  9,  0, 
-     0,  0,  2,  0,  0, 10,  0,  0, 
-     0,  0,  0,  3, 11,  0,  0,  0, 
-     0,  0,  0, 12,  4,  0,  0,  0, 
-     0,  0, 13,  0,  0,  5,  0,  0, 
-     0, 14,  0,  0,  0,  0,  6,  0, 
-     15,  0,  0,  0,  0,  0,  0,  7 
- }; 
-   
- static const ubyte flap[] = { 
-     0, 0, 0, 0, 0, 0, 0, 0, 
-     0, 6, 12, 18, 18, 12, 6, 0, 
-     1, 7, 13, 19, 19, 13, 7, 1, 
-     2, 8, 14, 20, 20, 14, 8, 2, 
-     3, 9, 15, 21, 21, 15, 9, 3, 
-     4, 10, 16, 22, 22, 16, 10, 4, 
-     5, 11, 17, 23, 23, 17, 11, 5, 
-     0, 0, 0, 0, 0, 0, 0, 0 
- }; 
-   
- static const ubyte ptwist[] = { 
-     0, 0, 0, 0, 0, 0, 0, 0, 
-     47, 35, 23, 11, 10, 22, 34, 46, 
-     45, 33, 21, 9, 8, 20, 32, 44, 
-     43, 31, 19, 7, 6, 18, 30, 42, 
-     41, 29, 17, 5, 4, 16, 28, 40, 
-     39, 27, 15, 3, 2, 14, 26, 38, 
-     37, 25, 13, 1, 0, 12, 24, 36, 
-     0, 0, 0, 0, 0, 0, 0, 0 
- }; 
-   
- static const ubyte invflap[] = { 
-     8, 16, 24, 32, 40, 48, 
-     9, 17, 25, 33, 41, 49, 
-     10, 18, 26, 34, 42, 50, 
-     11, 19, 27, 35, 43, 51 
- }; 
-   
- static const ubyte invptwist[] = { 
-     52, 51, 44, 43, 36, 35, 28, 27, 20, 19, 12, 11, 
-     53, 50, 45, 42, 37, 34, 29, 26, 21, 18, 13, 10, 
-     54, 49, 46, 41, 38, 33, 30, 25, 22, 17, 14, 9, 
-     55, 48, 47, 40, 39, 32, 31, 24, 23, 16, 15, 8 
- }; 
-   
- static const ubyte file_to_file[] = { 
-     0, 1, 2, 3, 3, 2, 1, 0 
- }; 
-   
- static const short KK_idx[10][64] = { 
-     { -1, -1, -1,  0,  1,  2,  3,  4, 
-       -1, -1, -1,  5,  6,  7,  8,  9, 
-       10, 11, 12, 13, 14, 15, 16, 17, 
-       18, 19, 20, 21, 22, 23, 24, 25, 
-       26, 27, 28, 29, 30, 31, 32, 33, 
-       34, 35, 36, 37, 38, 39, 40, 41, 
-       42, 43, 44, 45, 46, 47, 48, 49, 
-       50, 51, 52, 53, 54, 55, 56, 57 }, 
-     { 58, -1, -1, -1, 59, 60, 61, 62, 
-       63, -1, -1, -1, 64, 65, 66, 67, 
-       68, 69, 70, 71, 72, 73, 74, 75, 
-       76, 77, 78, 79, 80, 81, 82, 83, 
-       84, 85, 86, 87, 88, 89, 90, 91, 
-       92, 93, 94, 95, 96, 97, 98, 99, 
-       100,101,102,103,104,105,106,107, 
-       108,109,110,111,112,113,114,115}, 
-     {116,117, -1, -1, -1,118,119,120, 
-      121,122, -1, -1, -1,123,124,125, 
-      126,127,128,129,130,131,132,133, 
-      134,135,136,137,138,139,140,141, 
-      142,143,144,145,146,147,148,149, 
-      150,151,152,153,154,155,156,157, 
-      158,159,160,161,162,163,164,165, 
-      166,167,168,169,170,171,172,173 }, 
-     {174, -1, -1, -1,175,176,177,178, 
-      179, -1, -1, -1,180,181,182,183, 
-      184, -1, -1, -1,185,186,187,188, 
-      189,190,191,192,193,194,195,196, 
-      197,198,199,200,201,202,203,204, 
-      205,206,207,208,209,210,211,212, 
-      213,214,215,216,217,218,219,220, 
-      221,222,223,224,225,226,227,228 }, 
-     {229,230, -1, -1, -1,231,232,233, 
-      234,235, -1, -1, -1,236,237,238, 
-      239,240, -1, -1, -1,241,242,243, 
-      244,245,246,247,248,249,250,251, 
-      252,253,254,255,256,257,258,259, 
-      260,261,262,263,264,265,266,267, 
-      268,269,270,271,272,273,274,275, 
-      276,277,278,279,280,281,282,283 }, 
-     {284,285,286,287,288,289,290,291, 
-      292,293, -1, -1, -1,294,295,296, 
-      297,298, -1, -1, -1,299,300,301, 
-      302,303, -1, -1, -1,304,305,306, 
-      307,308,309,310,311,312,313,314, 
-      315,316,317,318,319,320,321,322, 
-      323,324,325,326,327,328,329,330, 
-      331,332,333,334,335,336,337,338 }, 
-     { -1, -1,339,340,341,342,343,344, 
-       -1, -1,345,346,347,348,349,350, 
-       -1, -1,441,351,352,353,354,355, 
-       -1, -1, -1,442,356,357,358,359, 
-       -1, -1, -1, -1,443,360,361,362, 
-       -1, -1, -1, -1, -1,444,363,364, 
-       -1, -1, -1, -1, -1, -1,445,365, 
-       -1, -1, -1, -1, -1, -1, -1,446 }, 
-     { -1, -1, -1,366,367,368,369,370, 
-       -1, -1, -1,371,372,373,374,375, 
-       -1, -1, -1,376,377,378,379,380, 
-       -1, -1, -1,447,381,382,383,384, 
-       -1, -1, -1, -1,448,385,386,387, 
-       -1, -1, -1, -1, -1,449,388,389, 
-       -1, -1, -1, -1, -1, -1,450,390, 
-       -1, -1, -1, -1, -1, -1, -1,451 }, 
-     {452,391,392,393,394,395,396,397, 
-      -1, -1, -1, -1,398,399,400,401, 
-      -1, -1, -1, -1,402,403,404,405, 
-      -1, -1, -1, -1,406,407,408,409, 
-      -1, -1, -1, -1,453,410,411,412, 
-      -1, -1, -1, -1, -1,454,413,414, 
-      -1, -1, -1, -1, -1, -1,455,415, 
-      -1, -1, -1, -1, -1, -1, -1,456 }, 
-     {457,416,417,418,419,420,421,422, 
-      -1,458,423,424,425,426,427,428, 
-      -1, -1, -1, -1, -1,429,430,431, 
-      -1, -1, -1, -1, -1,432,433,434, 
-      -1, -1, -1, -1, -1,435,436,437, 
-      -1, -1, -1, -1, -1,459,438,439, 
-      -1, -1, -1, -1, -1, -1,460,440, 
-      -1, -1, -1, -1, -1, -1, -1,461 } 
- }; 
-   
- static int binomial[5][64]; 
- static int pawnidx[5][24]; 
- static int pfactor[5][4]; 
-   
- static void init_indices(void) 
- { 
-     int i, j, k; 
-   
-     // binomial[k-1][n] = Bin(n, k) 
-     for (i = 0; i < 5; i++) 
-         for (j = 0; j < 64; j++) { 
-             int f = j; 
-             int l = 1; 
-             for (k = 1; k <= i; k++) { 
-                 f *= (j - k); 
-                 l *= (k + 1); 
-             } 
-             binomial[i][j] = f / l; 
-         } 
-   
-     for (i = 0; i < 5; i++) { 
-         int s = 0; 
-         for (j = 0; j < 6; j++) { 
-             pawnidx[i][j] = s; 
-             s += (i == 0) ? 1 : binomial[i - 1][ptwist[invflap[j]]]; 
-         } 
-         pfactor[i][0] = s; 
-         s = 0; 
-         for (; j < 12; j++) { 
-             pawnidx[i][j] = s; 
-             s += (i == 0) ? 1 : binomial[i - 1][ptwist[invflap[j]]]; 
-         } 
-         pfactor[i][1] = s; 
-         s = 0; 
-         for (; j < 18; j++) { 
-             pawnidx[i][j] = s; 
-             s += (i == 0) ? 1 : binomial[i - 1][ptwist[invflap[j]]]; 
-         } 
-         pfactor[i][2] = s; 
-         s = 0; 
-         for (; j < 24; j++) { 
-             pawnidx[i][j] = s; 
-             s += (i == 0) ? 1 : binomial[i - 1][ptwist[invflap[j]]]; 
-         } 
-         pfactor[i][3] = s; 
-     } 
- } 
-   
- static uint64_t encode_piece(struct TBEntry_piece *ptr, ubyte *norm, int *pos, int *factor) 
- { 
-     uint64_t idx = 0; 
-     int i, j, k, m, l, p; 
-     int n = ptr->num; 
-   
-     if (pos[0] & 0x04) { 
-         for (i = 0; i < n; i++) 
-             pos[i] ^= 0x07; 
-     } 
-     if (pos[0] & 0x20) { 
-         for (i = 0; i < n; i++) 
-             pos[i] ^= 0x38; 
-     } 
-   
-     for (i = 0; i < n; i++) 
-         if (offdiag[pos[i]]) break; 
-     if (i < (ptr->enc_type == 0 ? 3 : 2) && offdiag[pos[i]] > 0) 
-         for (i = 0; i < n; i++) 
-             pos[i] = flipdiag[pos[i]]; 
-   
-     switch (ptr->enc_type) { 
-   
-     case 0: /* 111 */ 
-         i = (pos[1] > pos[0]); 
-         j = (pos[2] > pos[0]) + (pos[2] > pos[1]); 
-   
-         if (offdiag[pos[0]]) 
-             idx = triangle[pos[0]] * 63*62 + (pos[1] - i) * 62 + (pos[2] - j); 
-         else if (offdiag[pos[1]]) 
-             idx = 6*63*62 + diag[pos[0]] * 28*62 + lower[pos[1]] * 62 + pos[2] - j; 
-         else if (offdiag[pos[2]]) 
-             idx = 6*63*62 + 4*28*62 + (diag[pos[0]]) * 7*28 + (diag[pos[1]] - i) * 28 + lower[pos[2]]; 
-         else 
-             idx = 6*63*62 + 4*28*62 + 4*7*28 + (diag[pos[0]] * 7*6) + (diag[pos[1]] - i) * 6 + (diag[pos[2]] - j); 
-         i = 3; 
-         break; 
-   
-     case 1: /* K3 */ 
-         j = (pos[2] > pos[0]) + (pos[2] > pos[1]); 
-   
-         idx = KK_idx[triangle[pos[0]]][pos[1]]; 
-         if (idx < 441) 
-             idx = idx + 441 * (pos[2] - j); 
-         else { 
-             idx = 441*62 + (idx - 441) + 21 * lower[pos[2]]; 
-             if (!offdiag[pos[2]]) 
-                 idx -= j * 21; 
-         } 
-         i = 3; 
-         break; 
-   
-     default: /* K2 */ 
-         idx = KK_idx[triangle[pos[0]]][pos[1]]; 
-         i = 2; 
-         break; 
-     } 
-     idx *= factor[0]; 
-   
-     for (; i < n;) { 
-         int t = norm[i]; 
-         for (j = i; j < i + t; j++) 
-             for (k = j + 1; k < i + t; k++) 
-                 if (pos[j] > pos[k]) Swap(pos[j], pos[k]); 
-         int s = 0; 
-         for (m = i; m < i + t; m++) { 
-             p = pos[m]; 
-             for (l = 0, j = 0; l < i; l++) 
-                 j += (p > pos[l]); 
-             s += binomial[m - i][p - j]; 
-         } 
-         idx += ((uint64_t)s) * ((uint64_t)factor[i]); 
-         i += t; 
-     } 
-   
-     return idx; 
- } 
-   
- // determine file of leftmost pawn and sort pawns 
- static int pawn_file(struct TBEntry_pawn *ptr, int *pos) 
- { 
-     int i; 
-   
-     for (i = 1; i < ptr->pawns[0]; i++) 
-         if (flap[pos[0]] > flap[pos[i]]) 
-             Swap(pos[0], pos[i]); 
-   
-     return file_to_file[pos[0] & 0x07]; 
- } 
-   
- static uint64_t encode_pawn(struct TBEntry_pawn *ptr, ubyte *norm, int *pos, int *factor) 
- { 
-     uint64_t idx; 
-     int i, j, k, m, s, t; 
-     int n = ptr->num; 
-   
-     if (pos[0] & 0x04) 
-         for (i = 0; i < n; i++) 
-             pos[i] ^= 0x07; 
-   
-     for (i = 1; i < ptr->pawns[0]; i++) 
-         for (j = i + 1; j < ptr->pawns[0]; j++) 
-             if (ptwist[pos[i]] < ptwist[pos[j]]) 
-                 Swap(pos[i], pos[j]); 
-   
-     t = ptr->pawns[0] - 1; 
-     idx = pawnidx[t][flap[pos[0]]]; 
-     for (i = t; i > 0; i--) 
-         idx += binomial[t - i][ptwist[pos[i]]]; 
-     idx *= factor[0]; 
-   
-     // remaining pawns 
-     i = ptr->pawns[0]; 
-     t = i + ptr->pawns[1]; 
-     if (t > i) { 
-         for (j = i; j < t; j++) 
-             for (k = j + 1; k < t; k++) 
-                 if (pos[j] > pos[k]) Swap(pos[j], pos[k]); 
-         s = 0; 
-         for (m = i; m < t; m++) { 
-             int p = pos[m]; 
-             for (k = 0, j = 0; k < i; k++) 
-                 j += (p > pos[k]); 
-             s += binomial[m - i][p - j - 8]; 
-         } 
-         idx += ((uint64_t)s) * ((uint64_t)factor[i]); 
-         i = t; 
-     } 
-   
-     for (; i < n;) { 
-         t = norm[i]; 
-         for (j = i; j < i + t; j++) 
-             for (k = j + 1; k < i + t; k++) 
-                 if (pos[j] > pos[k]) Swap(pos[j], pos[k]); 
-         s = 0; 
-         for (m = i; m < i + t; m++) { 
-             int p = pos[m]; 
-             for (k = 0, j = 0; k < i; k++) 
-                 j += (p > pos[k]); 
-             s += binomial[m - i][p - j]; 
-         } 
-         idx += ((uint64_t)s) * ((uint64_t)factor[i]); 
-         i += t; 
-     } 
-   
-     return idx; 
- } 
-   
- static ubyte decompress_pairs(struct PairsData *d, uint64_t index); 
-   
- // place k like pieces on n squares 
- static int subfactor(int k, int n) 
- { 
-     int i, f, l; 
-   
-     f = n; 
-     l = 1; 
-     for (i = 1; i < k; i++) { 
-         f *= n - i; 
-         l *= i + 1; 
-     } 
-   
-     return f / l; 
- } 
-   
- static uint64_t calc_factors_piece(int *factor, int num, int order, ubyte *norm, ubyte enc_type) 
- { 
-     int i, k, n; 
-     uint64_t f; 
-     static int pivfac[] = { 31332, 28056, 462 }; 
-   
-     n = 64 - norm[0]; 
-   
-     f = 1; 
-     for (i = norm[0], k = 0; i < num || k == order; k++) { 
-         if (k == order) { 
-             factor[0] = (int)f; // Pierre-Marie Baty -- added type cast 
-             f *= pivfac[enc_type]; 
-         } else { 
-             factor[i] = (int)f; // Pierre-Marie Baty -- added type cast 
-             f *= subfactor(norm[i], n); 
-             n -= norm[i]; 
-             i += norm[i]; 
-         } 
-     } 
-   
-     return f; 
- } 
-   
- static uint64_t calc_factors_pawn(int *factor, int num, int order, int order2, ubyte *norm, int file) 
- { 
-     int i, k, n; 
-     uint64_t f; 
-   
-     i = norm[0]; 
-     if (order2 < 0x0f) i += norm[i]; 
-     n = 64 - i; 
-   
-     f = 1; 
-     for (k = 0; i < num || k == order || k == order2; k++) { 
-         if (k == order) { 
-             factor[0] = (int)f; // Pierre-Marie Baty -- added type cast 
-             f *= pfactor[norm[0] - 1][file]; 
-         } else if (k == order2) { 
-             factor[norm[0]] = (int)f; // Pierre-Marie Baty -- added type cast 
-             f *= subfactor(norm[norm[0]], 48 - norm[0]); 
-         } else { 
-             factor[i] = (int)f; // Pierre-Marie Baty -- added type cast 
-             f *= subfactor(norm[i], n); 
-             n -= norm[i]; 
-             i += norm[i]; 
-         } 
-     } 
-   
-     return f; 
- } 
-   
- static void set_norm_piece(struct TBEntry_piece *ptr, ubyte *norm, ubyte *pieces) 
- { 
-     int i, j; 
-   
-     for (i = 0; i < ptr->num; i++) 
-         norm[i] = 0; 
-   
-     switch (ptr->enc_type) { 
-     case 0: 
-         norm[0] = 3; 
-         break; 
-     case 2: 
-         norm[0] = 2; 
-         break; 
-     default: 
-         norm[0] = ptr->enc_type - 1; 
-         break; 
-     } 
-   
-     for (i = norm[0]; i < ptr->num; i += norm[i]) 
-         for (j = i; j < ptr->num && pieces[j] == pieces[i]; j++) 
-             norm[i]++; 
- } 
-   
- static void set_norm_pawn(struct TBEntry_pawn *ptr, ubyte *norm, ubyte *pieces) 
- { 
-     int i, j; 
-   
-     for (i = 0; i < ptr->num; i++) 
-         norm[i] = 0; 
-   
-     norm[0] = ptr->pawns[0]; 
-     if (ptr->pawns[1]) norm[ptr->pawns[0]] = ptr->pawns[1]; 
-   
-     for (i = ptr->pawns[0] + ptr->pawns[1]; i < ptr->num; i += norm[i]) 
-         for (j = i; j < ptr->num && pieces[j] == pieces[i]; j++) 
-             norm[i]++; 
- } 
-   
- static void setup_pieces_piece(struct TBEntry_piece *ptr, unsigned char *data, uint64_t *tb_size) 
- { 
-     int i; 
-     int order; 
-   
-     for (i = 0; i < ptr->num; i++) 
-         ptr->pieces[0][i] = data[i + 1] & 0x0f; 
-     order = data[0] & 0x0f; 
-     set_norm_piece(ptr, ptr->norm[0], ptr->pieces[0]); 
-     tb_size[0] = calc_factors_piece(ptr->factor[0], ptr->num, order, ptr->norm[0], ptr->enc_type); 
-   
-     for (i = 0; i < ptr->num; i++) 
-         ptr->pieces[1][i] = data[i + 1] >> 4; 
-     order = data[0] >> 4; 
-     set_norm_piece(ptr, ptr->norm[1], ptr->pieces[1]); 
-     tb_size[1] = calc_factors_piece(ptr->factor[1], ptr->num, order, ptr->norm[1], ptr->enc_type); 
- } 
-   
- static void setup_pieces_piece_dtz(struct DTZEntry_piece *ptr, unsigned char *data, uint64_t *tb_size) 
- { 
-     int i; 
-     int order; 
-   
-     for (i = 0; i < ptr->num; i++) 
-         ptr->pieces[i] = data[i + 1] & 0x0f; 
-     order = data[0] & 0x0f; 
-     set_norm_piece((struct TBEntry_piece *)ptr, ptr->norm, ptr->pieces); 
-     tb_size[0] = calc_factors_piece(ptr->factor, ptr->num, order, ptr->norm, ptr->enc_type); 
- } 
-   
- static void setup_pieces_pawn(struct TBEntry_pawn *ptr, unsigned char *data, uint64_t *tb_size, int f) 
- { 
-     int i, j; 
-     int order, order2; 
-   
-     j = 1 + (ptr->pawns[1] > 0); 
-     order = data[0] & 0x0f; 
-     order2 = ptr->pawns[1] ? (data[1] & 0x0f) : 0x0f; 
-     for (i = 0; i < ptr->num; i++) 
-         ptr->file[f].pieces[0][i] = data[i + j] & 0x0f; 
-     set_norm_pawn(ptr, ptr->file[f].norm[0], ptr->file[f].pieces[0]); 
-     tb_size[0] = calc_factors_pawn(ptr->file[f].factor[0], ptr->num, order, order2, ptr->file[f].norm[0], f); 
-   
-     order = data[0] >> 4; 
-     order2 = ptr->pawns[1] ? (data[1] >> 4) : 0x0f; 
-     for (i = 0; i < ptr->num; i++) 
-         ptr->file[f].pieces[1][i] = data[i + j] >> 4; 
-     set_norm_pawn(ptr, ptr->file[f].norm[1], ptr->file[f].pieces[1]); 
-     tb_size[1] = calc_factors_pawn(ptr->file[f].factor[1], ptr->num, order, order2, ptr->file[f].norm[1], f); 
- } 
-   
- static void setup_pieces_pawn_dtz(struct DTZEntry_pawn *ptr, unsigned char *data, uint64_t *tb_size, int f) 
- { 
-     int i, j; 
-     int order, order2; 
-   
-     j = 1 + (ptr->pawns[1] > 0); 
-     order = data[0] & 0x0f; 
-     order2 = ptr->pawns[1] ? (data[1] & 0x0f) : 0x0f; 
-     for (i = 0; i < ptr->num; i++) 
-         ptr->file[f].pieces[i] = data[i + j] & 0x0f; 
-     set_norm_pawn((struct TBEntry_pawn *)ptr, ptr->file[f].norm, ptr->file[f].pieces); 
-     tb_size[0] = calc_factors_pawn(ptr->file[f].factor, ptr->num, order, order2, ptr->file[f].norm, f); 
- } 
-   
- static void calc_symlen(struct PairsData *d, int s, char *tmp) 
- { 
-     int s1, s2; 
-   
-     int w = *(int *)(d->sympat + 3 * s); 
-     s2 = (w >> 12) & 0x0fff; 
-     if (s2 == 0x0fff) 
-         d->symlen[s] = 0; 
-     else { 
-         s1 = w & 0x0fff; 
-         if (!tmp[s1]) calc_symlen(d, s1, tmp); 
-         if (!tmp[s2]) calc_symlen(d, s2, tmp); 
-         d->symlen[s] = d->symlen[s1] + d->symlen[s2] + 1; 
-     } 
-     tmp[s] = 1; 
- } 
-   
- static struct PairsData *setup_pairs(unsigned char *data, uint64_t tb_size, uint64_t *size, unsigned char **next, ubyte *flags, int wdl) 
- { 
-     struct PairsData *d; 
-     int i; 
-   
-     *flags = data[0]; 
-     if (data[0] & 0x80) { 
-         d = (struct PairsData *)malloc(sizeof(struct PairsData)); 
-         d->idxbits = 0; 
-         if (wdl) 
-             d->min_len = data[1]; 
-         else 
-             d->min_len = 0; 
-         *next = data + 2; 
-         size[0] = size[1] = size[2] = 0; 
-         return d; 
-     } 
-   
-     int blocksize = data[1]; 
-     int idxbits = data[2]; 
-     int real_num_blocks = *(uint32_t *)(&data[4]); 
-     int num_blocks = real_num_blocks + *(ubyte *)(&data[3]); 
-     int max_len = data[8]; 
-     int min_len = data[9]; 
-     int h = max_len - min_len + 1; 
-     int num_syms = *(ushort *)(&data[10 + 2 * h]); 
-     d = (struct PairsData *)malloc(sizeof(struct PairsData) + (h - 1) * sizeof(base_t) + num_syms); 
-     d->blocksize = blocksize; 
-     d->idxbits = idxbits; 
-     d->offset = (ushort *)(&data[10]); 
-     d->symlen = ((ubyte *)d) + sizeof(struct PairsData) + (h - 1) * sizeof(base_t); 
-     d->sympat = &data[12 + 2 * h]; 
-     d->min_len = min_len; 
-     *next = &data[12 + 2 * h + 3 * num_syms + (num_syms & 1)]; 
-   
-     int num_indices = (int)((tb_size + (1ULL << idxbits) - 1) >> idxbits); // Pierre-Marie Baty -- added type cast 
-     size[0] = 6ULL * num_indices; 
-     size[1] = 2ULL * num_blocks; 
-     size[2] = (1ULL << blocksize) * real_num_blocks; 
-   
-     // char tmp[num_syms]; 
-     char tmp[4096]; 
-     for (i = 0; i < num_syms; i++) 
-         tmp[i] = 0; 
-     for (i = 0; i < num_syms; i++) 
-         if (!tmp[i]) 
-             calc_symlen(d, i, tmp); 
-   
-     d->base[h - 1] = 0; 
-     for (i = h - 2; i >= 0; i--) 
-         d->base[i] = (d->base[i + 1] + d->offset[i] - d->offset[i + 1]) / 2; 
-     for (i = 0; i < h; i++) 
-         d->base[i] <<= 64 - (min_len + i); 
-   
-     d->offset -= d->min_len; 
-   
-     return d; 
- } 
-   
- static int init_table_wdl(struct TBEntry *entry, const char *str) 
- { 
-     ubyte *next; 
-     int f, s; 
-     uint64_t tb_size[8]; 
-     uint64_t size[8 * 3]; 
-     ubyte flags; 
-   
-     // first mmap the table into memory 
-   
-     entry->data = map_file(str, WDLSUFFIX, &entry->mapping); 
-     if (!entry->data) { 
-         std::cout << "Could not find " << str << WDLSUFFIX << std::endl; 
-         return 0; 
-     } 
-   
-     ubyte *data = (ubyte *)entry->data; 
-     if (((uint32_t *)data)[0] != WDL_MAGIC) { 
-         std::cout << "Corrupted table" << std::endl; 
-         unmap_file(entry->data, entry->mapping); 
-         entry->data = 0; 
-         return 0; 
-     } 
-   
-     int split = data[4] & 0x01; 
-     int files = data[4] & 0x02 ? 4 : 1; 
-   
-     data += 5; 
-   
-     if (!entry->has_pawns) { 
-         struct TBEntry_piece *ptr = (struct TBEntry_piece *)entry; 
-         setup_pieces_piece(ptr, data, &tb_size[0]); 
-         data += ptr->num + 1; 
-         data += ((uintptr_t)data) & 0x01; 
-   
-         ptr->precomp[0] = setup_pairs(data, tb_size[0], &size[0], &next, &flags, 1); 
-         data = next; 
-         if (split) { 
-             ptr->precomp[1] = setup_pairs(data, tb_size[1], &size[3], &next, &flags, 1); 
-             data = next; 
-         } else 
-             ptr->precomp[1] = NULL; 
-   
-         ptr->precomp[0]->indextable = (char *)data; 
-         data += size[0]; 
-         if (split) { 
-             ptr->precomp[1]->indextable = (char *)data; 
-             data += size[3]; 
-         } 
-   
-         ptr->precomp[0]->sizetable = (ushort *)data; 
-         data += size[1]; 
-         if (split) { 
-             ptr->precomp[1]->sizetable = (ushort *)data; 
-             data += size[4]; 
-         } 
-   
-         data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-         ptr->precomp[0]->data = data; 
-         data += size[2]; 
-         if (split) { 
-             data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-             ptr->precomp[1]->data = data; 
-         } 
-     } else { 
-         struct TBEntry_pawn *ptr = (struct TBEntry_pawn *)entry; 
-         s = 1 + (ptr->pawns[1] > 0); 
-         for (f = 0; f < 4; f++) { 
-             setup_pieces_pawn((struct TBEntry_pawn *)ptr, data, &tb_size[2 * f], f); 
-             data += ptr->num + s; 
-         } 
-         data += ((uintptr_t)data) & 0x01; 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp[0] = setup_pairs(data, tb_size[2 * f], &size[6 * f], &next, &flags, 1); 
-             data = next; 
-             if (split) { 
-                 ptr->file[f].precomp[1] = setup_pairs(data, tb_size[2 * f + 1], &size[6 * f + 3], &next, &flags, 1); 
-                 data = next; 
-             } else 
-                 ptr->file[f].precomp[1] = NULL; 
-         } 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp[0]->indextable = (char *)data; 
-             data += size[6 * f]; 
-             if (split) { 
-                 ptr->file[f].precomp[1]->indextable = (char *)data; 
-                 data += size[6 * f + 3]; 
-             } 
-         } 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp[0]->sizetable = (ushort *)data; 
-             data += size[6 * f + 1]; 
-             if (split) { 
-                 ptr->file[f].precomp[1]->sizetable = (ushort *)data; 
-                 data += size[6 * f + 4]; 
-             } 
-         } 
-   
-         for (f = 0; f < files; f++) { 
-             data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-             ptr->file[f].precomp[0]->data = data; 
-             data += size[6 * f + 2]; 
-             if (split) { 
-                 data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-                 ptr->file[f].precomp[1]->data = data; 
-                 data += size[6 * f + 5]; 
-             } 
-         } 
-     } 
-   
-     return 1; 
- } 
-   
- static int init_table_dtz(struct TBEntry *entry) 
- { 
-     ubyte *data = (ubyte *)entry->data; 
-     ubyte *next; 
-     int f, s; 
-     uint64_t tb_size[4]; 
-     uint64_t size[4 * 3]; 
-   
-     if (!data) 
-         return 0; 
-   
-     if (((uint32_t *)data)[0] != DTZ_MAGIC) { 
-         std::cout << "Corrupted table" << std::endl; 
-         return 0; 
-     } 
-   
-     int files = data[4] & 0x02 ? 4 : 1; 
-   
-     data += 5; 
-   
-     if (!entry->has_pawns) { 
-         struct DTZEntry_piece *ptr = (struct DTZEntry_piece *)entry; 
-         setup_pieces_piece_dtz(ptr, data, &tb_size[0]); 
-         data += ptr->num + 1; 
-         data += ((uintptr_t)data) & 0x01; 
-   
-         ptr->precomp = setup_pairs(data, tb_size[0], &size[0], &next, &(ptr->flags), 0); 
-         data = next; 
-   
-         ptr->map = data; 
-         if (ptr->flags & 2) { 
-             int i; 
-             for (i = 0; i < 4; i++) { 
-                 ptr->map_idx[i] = (data + 1 - ptr->map); 
-                 data += 1 + data[0]; 
-             } 
-             data += ((uintptr_t)data) & 0x01; 
-         } 
-   
-         ptr->precomp->indextable = (char *)data; 
-         data += size[0]; 
-   
-         ptr->precomp->sizetable = (ushort *)data; 
-         data += size[1]; 
-   
-         data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-         ptr->precomp->data = data; 
-         data += size[2]; 
-     } else { 
-         struct DTZEntry_pawn *ptr = (struct DTZEntry_pawn *)entry; 
-         s = 1 + (ptr->pawns[1] > 0); 
-         for (f = 0; f < 4; f++) { 
-             setup_pieces_pawn_dtz(ptr, data, &tb_size[f], f); 
-             data += ptr->num + s; 
-         } 
-         data += ((uintptr_t)data) & 0x01; 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp = setup_pairs(data, tb_size[f], &size[3 * f], &next, &(ptr->flags[f]), 0); 
-             data = next; 
-         } 
-   
-         ptr->map = data; 
-         for (f = 0; f < files; f++) { 
-             if (ptr->flags[f] & 2) { 
-                 int i; 
-                 for (i = 0; i < 4; i++) { 
-                     ptr->map_idx[f][i] = (data + 1 - ptr->map); 
-                     data += 1 + data[0]; 
-                 } 
-             } 
-         } 
-         data += ((uintptr_t)data) & 0x01; 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp->indextable = (char *)data; 
-             data += size[3 * f]; 
-         } 
-   
-         for (f = 0; f < files; f++) { 
-             ptr->file[f].precomp->sizetable = (ushort *)data; 
-             data += size[3 * f + 1]; 
-         } 
-   
-         for (f = 0; f < files; f++) { 
-             data = (ubyte *)((((uintptr_t)data) + 0x3f) & ~0x3f); 
-             ptr->file[f].precomp->data = data; 
-             data += size[3 * f + 2]; 
-         } 
-     } 
-   
-     return 1; 
- } 
-   
- static inline uint64_t bswap64(uint64_t val) { 
- #ifndef _MSC_VER 
-     return __builtin_bswap64(val); 
- #else 
-     return _byteswap_uint64(val); 
- #endif 
- } 
-   
- static inline uint32_t bswap32(uint32_t val) { 
- #ifndef _MSC_VER 
-     return __builtin_bswap32(val); 
- #else 
-     return _byteswap_ulong(val); 
- #endif 
- } 
-   
- static ubyte decompress_pairs(struct PairsData *d, uint64_t idx) 
- { 
-     if (!d->idxbits) 
-         return d->min_len; 
-   
-     uint32_t mainidx = (uint32_t)(idx >> d->idxbits); // Pierre-Marie Baty -- added type cast 
-     int litidx = (idx & ((1LL << d->idxbits) - 1)) - (1LL << (d->idxbits - 1)); // Pierre-Marie Baty -- added constant casts 
-     uint32_t block = *(uint32_t *)(d->indextable + 6 * mainidx); 
-     litidx += *(ushort *)(d->indextable + 6 * mainidx + 4); 
-     if (litidx < 0) { 
-         do { 
-             litidx += d->sizetable[--block] + 1; 
-         } while (litidx < 0); 
-     } else { 
-         while (litidx > d->sizetable[block]) 
-             litidx -= d->sizetable[block++] + 1; 
-     } 
-   
-     uint32_t *ptr = (uint32_t *)(d->data + (block << d->blocksize)); 
-   
-     int m = d->min_len; 
-     ushort *offset = d->offset; 
-     base_t *base = d->base - m; 
-     ubyte *symlen = d->symlen; 
-     int sym, bitcnt; 
-   
-     uint64_t code = bswap64(*((uint64_t *)ptr)); 
-     ptr += 2; 
-     bitcnt = 0; // number of "empty bits" in code 
-     for (;;) { 
-         int l = m; 
-         while (code < base[l]) l++; 
-         sym = (int)(offset[l] + ((code - base[l]) >> (64 - l))); // Pierre-Marie Baty -- added type cast 
-         if (litidx < (int)symlen[sym] + 1) break; 
-         litidx -= (int)symlen[sym] + 1; 
-         code <<= l; 
-         bitcnt += l; 
-         if (bitcnt >= 32) { 
-             bitcnt -= 32; 
-             code |= ((uint64_t)(bswap32(*ptr++))) << bitcnt; 
-         } 
-     } 
-   
-     ubyte *sympat = d->sympat; 
-     while (symlen[sym] != 0) { 
-         int w = *(int *)(sympat + 3 * sym); 
-         int s1 = w & 0x0fff; 
-         if (litidx < (int)symlen[s1] + 1) 
-             sym = s1; 
-         else { 
-             litidx -= (int)symlen[s1] + 1; 
-             sym = (w >> 12) & 0x0fff; 
-         } 
-     } 
-   
-     return *(sympat + 3 * sym); 
- } 
-   
- TBEntry* load_dtz_table(const char* str, uint64_t key1, uint64_t key2) 
- { 
-     int i; 
-     struct TBEntry *ptr, *ptr3; 
-     struct TBHashEntry *ptr2; 
-   
-     // find corresponding WDL entry 
-     ptr2 = WDL_hash[key1 >> (64 - TBHASHBITS)]; 
-     for (i = 0; i < HSHMAX; i++) 
-         if (ptr2[i].key == key1) break; 
-     if (i == HSHMAX) return NULL; 
-     ptr = ptr2[i].ptr; 
-   
-     ptr3 = (struct TBEntry *)malloc(ptr->has_pawns 
-                                     ? sizeof(struct DTZEntry_pawn) 
-                                     : sizeof(struct DTZEntry_piece)); 
-   
-     ptr3->data = map_file(str, DTZSUFFIX, &ptr3->mapping); 
-     ptr3->key = ptr->key; 
-     ptr3->num = ptr->num; 
-     ptr3->symmetric = ptr->symmetric; 
-     ptr3->has_pawns = ptr->has_pawns; 
-     if (ptr3->has_pawns) { 
-         struct DTZEntry_pawn *entry = (struct DTZEntry_pawn *)ptr3; 
-         entry->pawns[0] = ((struct TBEntry_pawn *)ptr)->pawns[0]; 
-         entry->pawns[1] = ((struct TBEntry_pawn *)ptr)->pawns[1]; 
-     } else { 
-         struct DTZEntry_piece *entry = (struct DTZEntry_piece *)ptr3; 
-         entry->enc_type = ((struct TBEntry_piece *)ptr)->enc_type; 
-     } 
-     if (!init_table_dtz(ptr3)) { 
-         free(ptr3); 
-         return NULL; 
-     } 
-     return ptr3; 
- } 
-   
- static void free_wdl_entry(struct TBEntry *entry) 
- { 
-     unmap_file(entry->data, entry->mapping); 
-     entry->data = NULL; 
-     if (!entry->has_pawns) { 
-         struct TBEntry_piece *ptr = (struct TBEntry_piece *)entry; 
-         free(ptr->precomp[0]); ptr->precomp[0] = NULL; 
-         free(ptr->precomp[1]); ptr->precomp[1] = NULL; 
-     } else { 
-         struct TBEntry_pawn *ptr = (struct TBEntry_pawn *)entry; 
-         int f; 
-         for (f = 0; f < 4; f++) { 
-             free(ptr->file[f].precomp[0]); ptr->file[f].precomp[0] = NULL; 
-             free(ptr->file[f].precomp[1]); ptr->file[f].precomp[1] = NULL; 
-         } 
-     } 
- } 
-   
- static void free_dtz_entry(struct TBEntry *entry) 
- { 
-     unmap_file(entry->data, entry->mapping); 
-     entry->data = NULL; 
-     if (!entry->has_pawns) { 
-         struct DTZEntry_piece *ptr = (struct DTZEntry_piece *)entry; 
-         free(ptr->precomp); ptr->precomp = NULL; 
-     } else { 
-         struct DTZEntry_pawn *ptr = (struct DTZEntry_pawn *)entry; 
-         int f; 
-         for (f = 0; f < 4; f++) { 
-             free(ptr->file[f].precomp); ptr->file[f].precomp = NULL; 
-         } 
-     } 
-     free(entry); 
- } 
-   
- static int wdl_to_map[5] = { 1, 3, 0, 2, 0 }; 
- static ubyte pa_flags[5] = { 8, 0, 0, 0, 4 }; 
-