From e25a47fcc4db09ab9b845a691297da67243e6049 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Tue, 2 Apr 2024 12:03:52 +0200
Subject: Kernel: Use "struct list" to handle file descriptors instead of a
 fixed sized array

---
 kernel/lib/list.c | 21 +++++++++++++++++++++
 kernel/lib/list.h |  2 ++
 2 files changed, 23 insertions(+)

(limited to 'kernel/lib')

diff --git a/kernel/lib/list.c b/kernel/lib/list.c
index d189c86..c663230 100644
--- a/kernel/lib/list.c
+++ b/kernel/lib/list.c
@@ -17,6 +17,18 @@ void list_reset(struct list *list) {
   list->tail_index = -1;
 }
 
+int list_clone(struct list *in, struct list *out) {
+  list_init(out);
+  for (int i = 0;; i++) {
+    void *output;
+    if (!list_get(in, i, &output)) {
+      break;
+    }
+    list_add(out, output, NULL);
+  }
+  return 1;
+}
+
 int list_add(struct list *list, void *entry, int *index) {
   if (list->tail_index + 1 >= list->capacity) {
     list->capacity += 25;
@@ -30,6 +42,15 @@ int list_add(struct list *list, void *entry, int *index) {
   return 1;
 }
 
+int list_set(struct list *list, int index, void *entry) {
+  if (index > list->tail_index) {
+    assert(0);
+    return 0;
+  }
+  list->entries[index] = entry;
+  return 1;
+}
+
 int list_get(const struct list *list, int index, void **out) {
   if (index > list->tail_index) {
     return 0;
diff --git a/kernel/lib/list.h b/kernel/lib/list.h
index b7085cd..b1f0127 100644
--- a/kernel/lib/list.h
+++ b/kernel/lib/list.h
@@ -9,6 +9,8 @@ struct list {
 int list_init(struct list *list);
 void list_reset(struct list *list);
 void list_free(struct list *list);
+int list_clone(struct list *in, struct list *out);
 int list_add(struct list *list, void *entry, int *index);
+int list_set(struct list *list, int index, void *entry);
 int list_get(const struct list *list, int index, void **out);
 #endif
-- 
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