sys/chunked_ringbuffer: let crb_end_chunk() return size of the chunk

sys/chunked_ringbuffer/chunked_ringbuffer.c

@@ -57,7 +57,7 @@
 {
     const uint8_t *in = data;
     for (size_t i = 0; i < len; ++i) {
         if (!crb_add_byte(rb ,in[i])) {
             return false;
         }
     }
@@ -71,9 +71,9 @@
         return false;
     }
 
     bool keep = crb_add_bytes(rb ,data, len);
 
     return crb_end_chunk(rb ,keep);
 }
 
 static unsigned _get_cur_len(chunk_ringbuf_t *rb)
@@ -87,13 +87,13 @@
     }
 }
 
-bool crb_end_chunk(chunk_ringbuf_t *rb, bool keep)
+unsigned crb_end_chunk(chunk_ringbuf_t *rb, bool keep)
 {
     int idx;
 
     /* no chunk was started */
     if (rb->cur_start == NULL) {
-        return false;
+        return 0;
     }
 
     if (keep) {
@@ -109,15 +109,15 @@
         }
         rb->cur = rb->cur_start;
         rb->cur_start = NULL;
-        return false;
+        return 0;
     }
 
     /* store complete chunk */
     rb->chunk_start[idx] = rb->cur_start;
     rb->chunk_len[idx] = _get_cur_len(rb);
     rb->cur_start = NULL;
 
-    return true;
+    return rb->chunk_len[idx];
 }
 
 bool crb_get_chunk_size(chunk_ringbuf_t *rb, size_t *len)
@@ -228,7 +228,7 @@
 
 void crb_init(chunk_ringbuf_t *rb, void *buffer, size_t len)
 {
     memset(rb ,0, sizeof(*rb));
     rb->buffer = buffer;
     rb->buffer_end = &rb->buffer[len - 1];
     rb->cur = rb->buffer;

sys/include/chunked_ringbuffer.h

@@ -160,10 +160,10 @@ bool crb_add_bytes(chunk_ringbuf_t *rb, const void *data, size_t len);
  * @param[in] valid     True if the chunk is valid and should be stored
  *                      False if the current chunk should be discarded
  *
- * @return true         If the chunk could be stored in the valid chunk array
- * @return false        If there is no more space in the valid chunk array
+ * @return size of chunk if the chunk could be stored in the valid chunk array
+ * @return 0 if there is no more space in the valid chunk array
  */
-bool crb_end_chunk(chunk_ringbuf_t *rb, bool valid);
+unsigned crb_end_chunk(chunk_ringbuf_t *rb, bool valid);
 
 /**
  * @brief Add a complete chunk to the Ringbuffer