From b2f7510d64c2e33dec17856539c71204ee423627 Mon Sep 17 00:00:00 2001
From: Francesco <inbox@francescorocca.me>
Date: Tue, 9 Sep 2025 22:25:43 +0200
Subject: [PATCH] refactor(vector): add index to foreach

---
 test/vector/v1.c  | 4 ++--
 vector/myvector.c | 4 ++--
 vector/myvector.h | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/test/vector/v1.c b/test/vector/v1.c
index 39be8b5..9a6f782 100644
--- a/test/vector/v1.c
+++ b/test/vector/v1.c
@@ -10,13 +10,13 @@ typedef struct my_elem {
 } my_elem_s;
 
 /* Functions used to iterate for each vector's element */
-static void multiply(void *elem) {
+static void multiply(size_t index, void *elem) {
 	my_elem_s *e = (my_elem_s *)elem;
 	e->age = e->age * 2;
 }
 
 /* Another way to use foreach
-static void print(void *elem) {
+static void print(size_t index, void *elem) {
 	my_elem_s *e = (my_elem_s *)elem;
 	printf("%s (%d)\n", e->name, e->age);
 }
diff --git a/vector/myvector.c b/vector/myvector.c
index 8cc2f1e..a20d815 100644
--- a/vector/myvector.c
+++ b/vector/myvector.c
@@ -282,7 +282,7 @@ int vec_set(vec_s *vec, size_t index, void *value) {
 	return 0;
 }
 
-int vec_foreach(vec_s *vec, void (*fefn)(void *)) {
+int vec_foreach(vec_s *vec, void (*fefn)(size_t index, void *elem)) {
 	if (vec == NULL || fefn == NULL) {
 		return -1;
 	}
@@ -292,7 +292,7 @@ int vec_foreach(vec_s *vec, void (*fefn)(void *)) {
 	}
 
 	for (size_t i = 0; i < vec->size; ++i) {
-		fefn((char *)vec->data + (i * vec->elem_size));
+		fefn(i, (char *)vec->data + (i * vec->elem_size));
 	}
 
 	mtx_unlock(&vec->lock);
diff --git a/vector/myvector.h b/vector/myvector.h
index 7389225..dbb7131 100644
--- a/vector/myvector.h
+++ b/vector/myvector.h
@@ -37,7 +37,7 @@ int vec_set(vec_s *vec, size_t index, void *value);
 
 int vec_clear(vec_s *vec);
 
-int vec_foreach(vec_s *vec, void (*fefn)(void *));
+int vec_foreach(vec_s *vec, void (*fefn)(size_t index, void *elem));
 
 // void *vec_sort(vec_s *, void (* sortfn)(void *a, void *b))