1 files changed, 56 insertions, 0 deletions
diff --git a/wsutil/feature_list.c b/wsutil/feature_list.c
new file mode 100644
index 0000000..f0c30d6
--- /dev/null
+++ b/wsutil/feature_list.c
@@ -0,0 +1,56 @@
+/* feature_list.c
+ * Routines for gathering and handling lists of present/absent features
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <stdbool.h>
+
+#include "config.h"
+
+#include <wsutil/feature_list.h>
+
+void
+with_feature(feature_list l, const char *fmt, ...)
+{
+    va_list arg;
+    GString *msg = g_string_new("+");
+    va_start(arg, fmt);
+    g_string_append_vprintf(msg, fmt, arg);
+    va_end(arg);
+    *l = g_list_prepend(*l, g_string_free(msg, false));
+}
+
+void
+without_feature(feature_list l, const char *fmt, ...)
+{
+    va_list arg;
+    GString *msg = g_string_new("-");
+    va_start(arg, fmt);
+    g_string_append_vprintf(msg, fmt, arg);
+    va_end(arg);
+    *l = g_list_prepend(*l, g_string_free(msg, false));
+}
+
+static int
+feature_sort_alpha(gconstpointer a, gconstpointer b)
+{
+    return g_ascii_strcasecmp((char *)a + 1, (char *)b + 1);
+}
+
+void
+sort_features(feature_list l)
+{
+    *l = g_list_sort(*l, feature_sort_alpha);
+}
+
+void
+free_features(feature_list l)
+{
+    g_list_free_full(*l, g_free);
+    *l = NULL;
+}