2 files changed, 15 insertions, 2 deletions
diff --git a/src/common/tusb_compiler.h b/src/common/tusb_compiler.h
index 2c30daf6f..a0a49d7ec 100644
--- a/src/common/tusb_compiler.h
+++ b/src/common/tusb_compiler.h
@@ -76,9 +76,9 @@
  * - ##__VA_ARGS__ is used to deal with 0 paramerter (swallows comma)
  *------------------------------------------------------------------*/
 #if !defined(__CCRX__)
-#define TU_ARGS_NUM(...)   _TU_NARG(_0, ##__VA_ARGS__,_RSEQ_N())
+#define TU_ARGS_NUM(...)   _TU_NARG(_0, ##__VA_ARGS__, _RSEQ_N())
 #else
-#define TU_ARGS_NUM(...)   _TU_NARG(_0, __VA_ARGS__,_RSEQ_N())
+#define TU_ARGS_NUM(...)   _TU_NARG(_0, __VA_ARGS__, _RSEQ_N())
 #endif
 
 #define _TU_NARG(...)      _GET_NTH_ARG(__VA_ARGS__)
diff --git a/src/common/tusb_types.h b/src/common/tusb_types.h
index 32cdba450..82798a484 100644
--- a/src/common/tusb_types.h
+++ b/src/common/tusb_types.h
@@ -543,22 +543,35 @@ TU_ATTR_ALWAYS_INLINE static inline const char *tu_edpt_type_str(tusb_xfer_type_
 //--------------------------------------------------------------------+
 // Descriptor helper
 //--------------------------------------------------------------------+
+
+// return next descriptor
 TU_ATTR_ALWAYS_INLINE static inline uint8_t const * tu_desc_next(void const* desc)
 {
   uint8_t const* desc8 = (uint8_t const*) desc;
   return desc8 + desc8[DESC_OFFSET_LEN];
 }
 
+// get descriptor type
 TU_ATTR_ALWAYS_INLINE static inline uint8_t tu_desc_type(void const* desc)
 {
   return ((uint8_t const*) desc)[DESC_OFFSET_TYPE];
 }
 
+// get descriptor length
 TU_ATTR_ALWAYS_INLINE static inline uint8_t tu_desc_len(void const* desc)
 {
   return ((uint8_t const*) desc)[DESC_OFFSET_LEN];
 }
 
+// find descriptor that match byte1 (type)
+uint8_t const * tu_desc_find(uint8_t const* desc, uint8_t const* end, uint8_t byte1);
+
+// find descriptor that match byte1 (type) and byte2
+uint8_t const * tu_desc_find2(uint8_t const* desc, uint8_t const* end, uint8_t byte1, uint8_t byte2);
+
+// find descriptor that match byte1 (type) and byte2
+uint8_t const * tu_desc_find3(uint8_t const* desc, uint8_t const* end, uint8_t byte1, uint8_t byte2, uint8_t byte3);
+
 #ifdef __cplusplus
  }
 #endif