Add tuxanci2 files

1 files changed, 81 insertions, 0 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
new file mode 100644
index 0000000..b5f6a2c
--- /dev/null
+++ b/src/keyboard.c
@@ -0,0 +1,81 @@
+/*
+ * Tuxánci 2 - A first person shooter
+ * Copyright (C) 2007-2011  Tuxánci Development Team
+ * Copyright (C) 2025-2026  Connor Thomson
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "ta_sdl.h"
+#include "keyboard.h"
+#include <stdlib.h>
+#include <string.h>
+
+static ta_key_callback_fn *ta_keyboard_callbacks = NULL;
+static int ta_keyboard_callbacks_capacity = 0;
+
+static int ta_keyboard_ensure_capacity(int key) {
+    if (key < ta_keyboard_callbacks_capacity) {
+        return 1;
+    }
+
+    int new_capacity = ta_keyboard_callbacks_capacity;
+    while (new_capacity <= key) {
+        new_capacity += sizeof(SDLK_UNKNOWN);
+    }
+
+    ta_key_callback_fn *new_array = realloc(
+        ta_keyboard_callbacks,
+        (size_t)new_capacity * sizeof(ta_key_callback_fn)
+    );
+    if (new_array == NULL) {
+        return 0;
+    }
+
+    memset(
+        new_array + ta_keyboard_callbacks_capacity,
+        0,
+        (size_t)(new_capacity - ta_keyboard_callbacks_capacity) * sizeof(ta_key_callback_fn)
+    );
+
+    ta_keyboard_callbacks = new_array;
+    ta_keyboard_callbacks_capacity = new_capacity;
+    return 1;
+}
+
+void ta_keyboard_set_callback(int key, void (*callback)(void)) {
+    if (key < 0 || !ta_keyboard_ensure_capacity(key)) {
+        return;
+    }
+    ta_keyboard_callbacks[key] = callback;
+}
+
+void ta_keyboard_dispatch(int key) {
+    if (key < 0) {
+        return;
+    }
+
+    if (key < ta_keyboard_callbacks_capacity && ta_keyboard_callbacks[key] != NULL) {
+        ta_keyboard_callbacks[key]();
+    }
+}
+
+void ta_keyboard_shutdown(void) {
+    if (ta_keyboard_callbacks) {
+        free(ta_keyboard_callbacks);
+    }
+
+    ta_keyboard_callbacks = NULL;
+    ta_keyboard_callbacks_capacity = 0;
+}
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