text: /*
   * nghttp2 - HTTP/2 C Library
   *
   * Copyright (c) 2016 Tatsuhiro Tsujikawa
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  #include "nghttp2_debug.h"
  
  #include <stdio.h>
  
  #ifdef DEBUGBUILD
  
  static void nghttp2_default_debug_vfprintf_callback(const char *fmt,
                                                      va_list args) {
    vfprintf(stderr, fmt, args);
  }
  
  static nghttp2_debug_vprintf_callback static_debug_vprintf_callback =
      nghttp2_default_debug_vfprintf_callback;
  
  void nghttp2_debug_vprintf(const char *format, ...) {
    if (static_debug_vprintf_callback) {
      va_list args;
      va_start(args, format);
      static_debug_vprintf_callback(format, args);
      va_end(args);
    }
  }
  
  void nghttp2_set_debug_vprintf_callback(
      nghttp2_debug_vprintf_callback debug_vprintf_callback) {
    static_debug_vprintf_callback = debug_vprintf_callback;
  }
  
  #else /* !DEBUGBUILD */
  
  void nghttp2_set_debug_vprintf_callback(
      nghttp2_debug_vprintf_callback debug_vprintf_callback /*_U_*/) {}
  
  #endif /* !DEBUGBUILD */
  