Create linked list data structureHEADmaster

We will need to have a list to traverse game entities.

The first idea is to implement a mutable list. In case of mutable list
get too bad or error prone. We can easily change it to immutable.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/src/list.h b/src/list.h
new file mode 100644
index 0000000..232ccb4
--- /dev/null
+++ b/src/list.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2022, Johnny Richard
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef LIST_H
+#define LIST_H
+
+#include <stdbool.h>
+
+struct list
+{
+  struct list* next;
+  void* value;
+};
+
+typedef struct list list_t;
+
+list_t*
+list_new(void* value);
+
+bool
+list_is_empty();
+
+void
+list_push(list_t** list, void* value);
+
+list_t*
+list_pop(list_t** list);
+
+void
+list_destroy(list_t** list);
+
+#endif /* LIST_H */