diff options
Diffstat (limited to 'include/zobrist.c')
| -rw-r--r-- | include/zobrist.c | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/include/zobrist.c b/include/zobrist.c index 48a115b..1fdd8a9 100644 --- a/include/zobrist.c +++ b/include/zobrist.c @@ -1,18 +1,18 @@ /* - This file is part of ct. + This file is part of ct. - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. - You should have received a copy of the GNU General Public License - along with ct. If not, see <https://www.gnu.org/licenses/>. + You should have received a copy of the GNU General Public License + along with ct. If not, see <https://www.gnu.org/licenses/>. */ #include "zobrist.h" @@ -28,34 +28,34 @@ static uint64_t *zobrist; // =================================================================== int zobrist_init(void) { - if (zobrist != NULL) return EXIT_FAILURE; + if (zobrist != NULL) return EXIT_FAILURE; - zobrist = malloc(sizeof(uint64_t)*board_size*board_size*(15*2*3)); - // TODO: trap errno + zobrist = malloc(sizeof(uint64_t)*board_size*board_size*(15*2*3)); + // TODO: trap errno - for (int k=0; k<board_size*board_size*(15*2*3); k++) { - XORSHIFT64; - zobrist[k] = RANDOM64; - } + for (int k=0; k<board_size*board_size*(15*2*3); k++) { + XORSHIFT64; + zobrist[k] = RANDOM64; + } - return EXIT_SUCCESS; + return EXIT_SUCCESS; } void zobrist_free(void) { - if (zobrist != NULL) { - free(zobrist); - zobrist = NULL; - } + if (zobrist != NULL) { + free(zobrist); + zobrist = NULL; + } } uint64_t zobrist_compute(void) { - uint64_t hash = 0; - for (uint8_t l=0; l<board_size*board_size; l++) { - colour_stack_t c = colours[l]; - const uint8_t count = COUNT_AT(l); - enum STONE_VARIANT s = STONE_AT(l); - for (uint8_t h=0; h<count; h++, c >>= 1) - hash ^= zobrist[l*(15*2*3)+h*2*3+(c&1)*3+s]; - } - return hash; + uint64_t hash = 0; + for (uint8_t l=0; l<board_size*board_size; l++) { + colour_stack_t c = colours[l]; + const uint8_t count = COUNT_AT(l); + enum STONE_VARIANT s = STONE_AT(l); + for (uint8_t h=0; h<count; h++, c >>= 1) + hash ^= zobrist[l*(15*2*3)+h*2*3+(c&1)*3+s]; + } + return hash; } |