libusbgx: Add usbg_get_config_str_langs()

Add a function which allows to get the list of languages
in which config strings are currently available.

Thanks to this function now we may iterate through all strings
languages available in particular config and print their values.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/include/usbg/usbg.h b/include/usbg/usbg.h
index ba760f5..31d9862 100644
--- a/include/usbg/usbg.h
+++ b/include/usbg/usbg.h
@@ -816,6 +816,14 @@ extern int usbg_get_config_strs(usbg_config *c, int lang,
 				struct usbg_config_strs *c_strs);
 
 /**
+ * @brief Get the array of languages available in this config
+ * @param c Pointer to configuration
+ * @param langs array of available language codes
+ * @return 0 on success usbg_error if error occurred
+ */
+extern int usbg_get_config_strs_langs(usbg_config *c, int **langs);
+
+/**
  * @brief Free configuration strings
  * @details This function releases the memory allocated for strings
  *          not for struct usbg_config_strs itself.
diff --git a/src/usbg.c b/src/usbg.c
index 5bd1090..fb6ee4b 100644
--- a/src/usbg.c
+++ b/src/usbg.c
@@ -1705,6 +1705,11 @@ int usbg_get_gadget_strs_langs(usbg_gadget *g, int **langs)
 	return usbg_get_strs_langs_by_path(g->path, g->name, langs);
 }
 
+int usbg_get_config_strs_langs(usbg_config *c, int **langs)
+{
+	return usbg_get_strs_langs_by_path(c->path, c->name, langs);
+}
+
 int usbg_set_gadget_str(usbg_gadget *g, usbg_gadget_str str, int lang,
 		const char *val)
 {