til_settings: add an optional til_settings_t.prefix

Preparatory commit for bridging the gap separating a baked
til_setup_t from a runtime-populated descendant til_settings_t
like modules::rtv produces for its channels via
til_module_setup_randomize().

For these currently orphaned til_settings_t instances we don't
readily have access to the logical ancestor til_settings_t that
was used to produce the module_context's bound til_setup_t.  But
we don't really need the ancestor til_settings_t, all we _really_
want is the ancestral path to prefix the orphan til_settings_t
instances.

So this commit introduces supplying a prefix which gets prepended
to paths printed via the settings instance.  A later commit will
make use of this in modules::rtv when producing the settings
instance passed to til_module_setup_randomize()

1 files changed, 1 insertions, 1 deletions

diff --git a/src/til_settings.h b/src/til_settings.h
index e2653e4..6ff791c 100644
--- a/src/til_settings.h
+++ b/src/til_settings.h
@@ -44,7 +44,7 @@ struct til_setting_t {
 	void				*user_data;
 };
 
-til_settings_t * til_settings_new(const til_settings_t *parent, const char *label, const char *settings);
+til_settings_t * til_settings_new(const char *prefix, const til_settings_t *parent, const char *label, const char *settings);
 til_settings_t * til_settings_free(til_settings_t *settings);
 unsigned til_settings_get_count(const til_settings_t *settings);
 const char * til_settings_get_value_by_key(const til_settings_t *settings, const char *key, til_setting_t **res_setting);