utils: add nm_utils_parse_debug_string() to replace g_parse_debug_string()

g_parse_debug_string() interprets the string "help" special and accepts
an "all" tag to invert the result. We don't want that.

src/NetworkManagerUtils.c

@@ -3627,3 +3627,65 @@ nm_utils_g_value_set_strv (GValue *value, GPtrArray *strings)
 
 	g_value_take_boxed (value, strv);
 }
+
+/*****************************************************************************/
+
+static gboolean
+debug_key_matches (const gchar *key,
+                   const gchar *token,
+                   guint        length)
+{
+	/* may not call GLib functions: see note in g_parse_debug_string() */
+	for (; length; length--, key++, token++) {
+		char k = (*key   == '_') ? '-' : g_ascii_tolower (*key  );
+		char t = (*token == '_') ? '-' : g_ascii_tolower (*token);
+
+		if (k != t)
+			return FALSE;
+	}
+
+	return *key == '\0';
+}
+
+/**
+ * nm_utils_parse_debug_string:
+ * @string: the string to parse
+ * @keys: the debug keys
+ * @nkeys: number of entires in @keys
+ *
+ * Similar to g_parse_debug_string(), but does not special
+ * case "help" or "all".
+ *
+ * Returns: the flags
+ */
+guint
+nm_utils_parse_debug_string (const char *string,
+                             const GDebugKey *keys,
+                             guint nkeys)
+{
+	guint i;
+	guint result = 0;
+	const char *q;
+
+	if (string == NULL)
+		return 0;
+
+	while (*string) {
+		q = strpbrk (string, ":;, \t");
+		if (!q)
+			q = string + strlen (string);
+
+		for (i = 0; i < nkeys; i++) {
+			if (debug_key_matches (keys[i].key, string, q - string))
+				result |= keys[i].value;
+		}
+
+		string = q;
+		if (*string)
+			string++;
+	}
+
+	return result;
+}
+
+

src/NetworkManagerUtils.h

@@ -429,5 +429,8 @@ void nm_utils_g_value_set_object_path_array (GValue *value,
                                              GSList *objects,
                                              NMUtilsObjectFunc filter_func,
                                              gpointer user_data);
+guint nm_utils_parse_debug_string (const char *string,
+                                   const GDebugKey *keys,
+                                   guint nkeys);
 
 #endif /* __NETWORKMANAGER_UTILS_H__ */