Pulled lots of things out of game loop

1 files changed, 95 insertions, 0 deletions

diff --git a/src/move.c b/src/move.c
new file mode 100644
index 0000000..a22cb59
--- /dev/null
+++ b/src/move.c
@@ -0,0 +1,95 @@
+/* This file is a part of othello-ai-guile-c
+ *
+ * Copyright (C) 2021  Robby Zambito
+ *
+ * othello-ai-guile-c 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.
+ *
+ * othello-ai-guile-c 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+
+#include <libguile.h>
+#include <readline/history.h>
+#include <readline/readline.h>
+
+#include "othello.h"
+#include "othello_move.h"
+
+#define STREQ(a, b) (strcmp(a, b) == 0)
+
+static void print_help() {
+  puts("To enter a move, enter the two row and column seperated by spaces.\n"
+       "For example `0 0` will select the top left corner.\n\n"
+       "p - Print the board again\n"
+       "g - Drop into a guile repl\n"
+       "\n"
+       "In the guile repl you can define an AI to use for the current"
+       "player.\n"
+       "After you define an AI for that player, it will be used for the rest "
+       "of the game instead of prompting for input for that user.\n");
+}
+
+static char *prompt_player(enum player_color current_player) {
+  switch (current_player) {
+  case WHITE:
+    return "Player 1 [h for help] > ";
+  case BLACK:
+    return "Player 2 [h for help] > ";
+  default:
+    perror("There is no current player");
+    exit(EXIT_FAILURE);
+  }
+}
+
+static void inner_main(void *closure, int argc, char **argv) {
+  (void)closure;
+  scm_shell(argc, argv);
+}
+
+struct move prompt_get_move(enum player_color current_player) {
+  // Initialize move to an invalid move.
+  struct move move = {-1, -1};
+
+  char *prompt = prompt_player(current_player);
+  do {
+    char *input = readline(prompt);
+
+    if (input != NULL) {
+      add_history(input);
+      if (STREQ(input, "h")) {
+        print_help();
+      } else if (STREQ(input, "p")) {
+        print_board();
+      } else if (STREQ(input, "g")) {
+        int argc = 1;
+        char **argv = calloc(1, sizeof(char *));
+        argv[0] = "othello";
+        /*scm_with_guile(void *(*func)(void *), void *data)*/
+        scm_boot_guile(argc, argv, inner_main, NULL);
+        free(argv);
+      } else {
+        sscanf(input, "%d %d", &move.row, &move.col);
+      }
+    } else {
+      // If input was NULL, we have reached an EOF and would like to exit.
+      free(input);
+      exit(0);
+    }
+
+    free(input);
+  } while (!is_valid_move(current_player, move));
+
+  return move;
+}