diff options
Diffstat (limited to 'include/actions.h')
| -rw-r--r-- | include/actions.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/include/actions.h b/include/actions.h index 0127119..913a8cb 100644 --- a/include/actions.h +++ b/include/actions.h @@ -1,5 +1,5 @@ /* - This file is part of ct. + This file is part of ctak. 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 @@ -12,7 +12,7 @@ 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/>. + along with ctak. If not, see <https://www.gnu.org/licenses/>. */ #ifndef ACTIONS_H @@ -55,13 +55,25 @@ extern int8_t move_deltas[4]; // =================================================================== void actions_init(const uint8_t board_size); -void actions_free(action_t *actions); + +/* + * Generate the legal actions. The move list is drawn from a static + * per-search-level scratch buffer: one buffer per recursion level, + * so nested generate calls at different levels do not clobber each + * other. `level' is the recursion depth within the current search + * (0 at the root). The returned pointer is valid until the next + * generate call at the same level. + */ +action_t *actions_generate_at(tak_state_p state, uint32_t *num_actions, + const uint32_t level); action_t *actions_generate(tak_state_p state, uint32_t *num_actions); char action_in_list(action_t action, action_t *actions, const uint32_t num_actions); -void action_move_to_front(action_t action, action_t *actions, - const uint32_t num_actions); +// Move `action' to the front of the list. Returns EXIT_FAILURE (and +// leaves the list untouched) if the action is not in the list. +int action_move_to_front(action_t action, action_t *actions, + const uint32_t num_actions); void action_take(tak_state_p state, const action_t action); void action_undo(tak_state_p state, const action_t action); |