From 1cf7973245b3331600a21c17eeee853e1cb3e3ec Mon Sep 17 00:00:00 2001
From: John Hernandez <129467592+H3rnand3zzz@users.noreply.github.com>
Date: Fri, 10 Nov 2023 12:01:44 +0100
Subject: [PATCH] Minor `config/conflists.c` refactoring

Refactor functions `conf_string_list_add`, `conf_string_list_remove`:
simplify the logic, improve readability and avoid unnecessary allocations.
---
 src/config/conflists.c | 79 ++++++++++++++++++------------------------
 1 file changed, 33 insertions(+), 46 deletions(-)

diff --git a/src/config/conflists.c b/src/config/conflists.c
index 1d0cb5395..4032878ee 100644
--- a/src/config/conflists.c
+++ b/src/config/conflists.c
@@ -35,6 +35,7 @@
 
 #include "config.h"
 #include "common.h"
+#include "log.h"
 
 #include <string.h>
 #include <glib.h>
@@ -42,46 +43,36 @@
 gboolean
 conf_string_list_add(GKeyFile* keyfile, const char* const group, const char* const key, const char* const item)
 {
+    if (!item) {
+        log_warning("Invalid parameter in `conf_string_list_add`: item is NULL. group=%s, key=%s", group, key);
+        return FALSE;
+    }
+
     gsize length;
     auto_gcharv gchar** list = g_key_file_get_string_list(keyfile, group, key, &length, NULL);
-    GList* glist = NULL;
 
-    // list found
-    if (list) {
-        int i = 0;
-        for (i = 0; i < length; i++) {
-            // item already in list, exit function
-            if (strcmp(list[i], item) == 0) {
-                g_list_free_full(glist, g_free);
-                return FALSE;
-            }
-            // add item to our g_list
-            glist = g_list_append(glist, strdup(list[i]));
-        }
-
-        // item not found, add to our g_list
-        glist = g_list_append(glist, strdup(item));
+    if (!list) {
+        const gchar* new_list[2] = { item, NULL };
+        g_key_file_set_string_list(keyfile, group, key, new_list, 1);
+        return TRUE;
+    }
 
-        // create the new list entry
-        const gchar* new_list[g_list_length(glist) + 1];
-        GList* curr = glist;
-        i = 0;
-        while (curr) {
-            new_list[i++] = curr->data;
-            curr = g_list_next(curr);
+    // Check if item is already in the list
+    for (gsize i = 0; i < length; ++i) {
+        if (strcmp(list[i], item) == 0) {
+            return FALSE;
         }
-        new_list[i] = NULL;
-        g_key_file_set_string_list(keyfile, group, key, new_list, g_list_length(glist));
-
-        // list not found
-    } else {
-        const gchar* new_list[2];
-        new_list[0] = item;
-        new_list[1] = NULL;
-        g_key_file_set_string_list(keyfile, group, key, new_list, 1);
     }
 
-    g_list_free_full(glist, g_free);
+    // Add item to the existing list
+    gchar** new_list = g_new(gchar*, length + 2);
+    for (gsize i = 0; i < length; ++i) {
+        new_list[i] = g_strdup(list[i]);
+    }
+    new_list[length] = g_strdup(item);
+    new_list[length + 1] = NULL;
+
+    g_key_file_set_string_list(keyfile, group, key, (const gchar* const*)new_list, length + 1);
 
     return TRUE;
 }
@@ -92,41 +83,37 @@ conf_string_list_remove(GKeyFile* keyfile, const char* const group, const char*
     gsize length;
     auto_gcharv gchar** list = g_key_file_get_string_list(keyfile, group, key, &length, NULL);
 
-    gboolean deleted = FALSE;
     if (!list) {
         return FALSE;
     }
-    int i = 0;
+
     GList* glist = NULL;
+    gboolean deleted = FALSE;
 
-    for (i = 0; i < length; i++) {
-        // item found, mark as deleted
+    for (int i = 0; i < length; i++) {
         if (strcmp(list[i], item) == 0) {
             deleted = TRUE;
-        } else {
-            // add item to our g_list
-            glist = g_list_append(glist, strdup(list[i]));
+            continue;
         }
+        glist = g_list_append(glist, strdup(list[i]));
     }
 
     if (deleted) {
         if (g_list_length(glist) == 0) {
             g_key_file_remove_key(keyfile, group, key, NULL);
         } else {
-            // create the new list entry
             const gchar* new_list[g_list_length(glist) + 1];
-            GList* curr = glist;
-            i = 0;
-            while (curr) {
+            int i = 0;
+
+            for (GList* curr = glist; curr; curr = g_list_next(curr)) {
                 new_list[i++] = curr->data;
-                curr = g_list_next(curr);
             }
+
             new_list[i] = NULL;
             g_key_file_set_string_list(keyfile, group, key, new_list, g_list_length(glist));
         }
     }
 
     g_list_free_full(glist, g_free);
-
     return deleted;
 }