nghttp3_buf_len
===============

Synopsis
--------

*#include <nghttp3/nghttp3.h>*

.. function:: size_t nghttp3_buf_len(const nghttp3_buf *buf)

    
    `nghttp3_buf_len` returns the number of bytes left to read.  In
    other words, it returns :member:`buf->last <nghttp3_buf.last>` -
    :member:`buf->pos <nghttp3_buf.pos>`.