inline is_prefix function

ext/datadog_cov/datadog_cov.c

@@ -1,18 +1,6 @@
 #include <ruby.h>
 #include <ruby/debug.h>
 
-static int is_prefix(char *prefix, long prefix_len, const char *str)
-{
-  if (strncmp(prefix, str, prefix_len) == 0)
-  {
-    return 1;
-  }
-  else
-  {
-    return 0;
-  }
-}
-
 char *ruby_strndup(const char *str, size_t size)
 {
   char *dup;
@@ -146,14 +134,14 @@ static void dd_cov_update_coverage(rb_event_flag_t event, VALUE data, VALUE self
   dd_cov_data->last_filename_ptr = current_filename_ptr;
 
   // if given filename is not located under the root, we skip it
-  if (dd_cov_data->root_len == 0 || is_prefix(dd_cov_data->root, dd_cov_data->root_len, c_filename) == 0)
+  if (dd_cov_data->root_len == 0 || strncmp(dd_cov_data->root, c_filename, dd_cov_data->root_len) != 0)
   {
     return;
   }
 
   // if ignored_path is provided and given filename is located under the ignored_path, we skip it too
   // this is useful for ignoring bundled gems location
-  if (dd_cov_data->ignored_path_len != 0 && is_prefix(dd_cov_data->ignored_path, dd_cov_data->ignored_path_len, c_filename) == 1)
+  if (dd_cov_data->ignored_path_len != 0 && strncmp(dd_cov_data->ignored_path, c_filename, dd_cov_data->ignored_path_len) == 0)
   {
     return;
   }