From 39022d53ff4957e5c8d5cd1f587f74f28471fe82 Mon Sep 17 00:00:00 2001
From: laentropia <aadrian887mh@gmail.com>
Date: Mon, 13 Apr 2026 17:55:45 -0600
Subject: [PATCH] addition: Added basic header and structure

---
 include/arraylist.h   | 61 +++++++++++++++++++++++++++++++++++++++++++
 src/arraylist.c       | 34 ++++++++++++++++++++++++
 src/main.c            |  8 ++++++
 test/CMakeLists.txt   |  2 +-
 test/test_arraylist.c |  5 ++++
 5 files changed, 109 insertions(+), 1 deletion(-)

diff --git a/include/arraylist.h b/include/arraylist.h
index e69de29..087c47c 100644
--- a/include/arraylist.h
+++ b/include/arraylist.h
@@ -0,0 +1,61 @@
+#ifndef ARRAYLIST_H
+#define ARRAYLIST_H
+
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+typedef struct {
+    void *data;
+    size_t capacity;
+    size_t len;
+    size_t elem_size;
+} ArrayList;
+
+typedef struct {
+    ArrayList array;
+    size_t offset;
+} ArrayListSlice;
+
+typedef enum {
+    ARRLIST_OK = 0,
+    ARRLIST_OUT_OF_BOUNDS,
+    ARRLIST_BAD_ALLOC,
+    ARRLIST_EMPTY,
+    ARRLIST_NULL_ARG,
+    ARRLIST_INVALID_CAPACITY,
+    ARRLIST_INVALID_ELEM_SIZE,
+} ArrayListErr;
+
+typedef struct {
+    bool is_valid;
+    union {
+        ArrayListErr err;
+        ArrayList array;
+    };
+} ArrayListResult;
+
+ArrayListResult arraylist_init(size_t capacity, size_t elem_size);
+ArrayListErr arraylist_destroy(ArrayList *arr);
+ArrayListErr arraylist_clear(ArrayList *arr);
+
+size_t arraylist_size(ArrayList *arr);
+size_t arraylist_capacity(ArrayList *arr);
+bool arraylist_is_empty(ArrayList *arr);
+
+ArrayListErr arraylist_push_back(ArrayList *arr, void *data);
+ArrayListErr arraylist_insert(ArrayList*arr, size_t index, void *data);
+ArrayListErr arraylist_push_front(ArrayList* arr, void *data);
+
+// Here out can be null for not having anything writen
+ArrayListErr arraylist_pop_back(ArrayList *arr, void *out);
+ArrayListErr arraylist_remove_at(ArrayList *arr, size_t index, void *out);
+ArrayListErr arraylist_pop_front(ArrayList *arr, void *out);
+
+ArrayListErr arraylist_get(ArrayList *arr, size_t index, void *out);
+ArrayListErr arraylist_set(ArrayList *arr, size_t index, void *data);
+
+ArrayListErr arraylist_resize(ArrayList *arr, size_t new_capacity);
+ArrayListErr arraylist_reserve(ArrayList *arr, size_t size_to_reserve);
+
+#endif
diff --git a/src/arraylist.c b/src/arraylist.c
index e69de29..957bfd2 100644
--- a/src/arraylist.c
+++ b/src/arraylist.c
@@ -0,0 +1,34 @@
+#include "arraylist.h"
+#include <stdbool.h>
+#include <stdlib.h>
+
+ArrayListResult arraylist_init(size_t capacity, size_t elem_size) {
+    if (capacity == 0) {
+        return (ArrayListResult) {
+            .is_valid = false,
+            .err = ARRLIST_INVALID_CAPACITY};
+    }
+
+    if (elem_size == 0) {
+        return (ArrayListResult) {
+            .is_valid = false,
+            .err = ARRLIST_INVALID_ELEM_SIZE,
+        };
+    }
+
+    ArrayList arr = {
+        .data = malloc(capacity * elem_size),
+        .capacity = capacity,
+        .elem_size = elem_size,
+        .len = 0
+    };
+
+    if (arr.data == NULL) {
+        return (ArrayListResult) {
+            .is_valid = false,
+            .err = ARRLIST_BAD_ALLOC,
+        };
+    }
+
+    return (ArrayListResult) {.is_valid = true, .array = arr};
+}
diff --git a/src/main.c b/src/main.c
index e69de29..c54152a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+
+    printf("hola\n");
+    return EXIT_SUCCESS;
+}
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index df65436..965d2ed 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -3,7 +3,7 @@ find_package(cmocka REQUIRED)
 add_executable(test_arraylist test_arraylist.c)
 
 target_link_libraries(test_arraylist
-    arena_lib
+    arraylist_lib
     cmocka::cmocka
 )
 
diff --git a/test/test_arraylist.c b/test/test_arraylist.c
index e69de29..24acc10 100644
--- a/test/test_arraylist.c
+++ b/test/test_arraylist.c
@@ -0,0 +1,5 @@
+#include <stdlib.h>
+
+int main(void) {
+    return EXIT_SUCCESS;
+}