text: #ifndef HEADER_CURL_HTTP2_H
  #define HEADER_CURL_HTTP2_H
  /***************************************************************************
   *                                  _   _ ____  _
   *  Project                     ___| | | |  _ \| |
   *                             / __| | | | |_) | |
   *                            | (__| |_| |  _ <| |___
   *                             \___|\___/|_| \_\_____|
   *
   * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
   *
   * This software is licensed as described in the file COPYING, which
   * you should have received as part of this distribution. The terms
   * are also available at http://curl.haxx.se/docs/copyright.html.
   *
   * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   * copies of the Software, and permit persons to whom the Software is
   * furnished to do so, under the terms of the COPYING file.
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   * KIND, either express or implied.
   *
   ***************************************************************************/
  
  #include "curl_setup.h"
  
  #ifdef USE_NGHTTP2
  #include "http.h"
  /*
   * Store nghttp2 version info in this buffer, Prefix with a space.  Return
   * total length written.
   */
  int Curl_http2_ver(char *p, size_t len);
  
  CURLcode Curl_http2_init(struct connectdata *conn);
  CURLcode Curl_http2_send_request(struct connectdata *conn);
  CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
                                      struct connectdata *conn);
  CURLcode Curl_http2_setup(struct connectdata *conn);
  CURLcode Curl_http2_switched(struct connectdata *conn);
  #else /* USE_NGHTTP2 */
  #define Curl_http2_init(x) CURLE_UNSUPPORTED_PROTOCOL
  #define Curl_http2_send_request(x) CURLE_UNSUPPORTED_PROTOCOL
  #define Curl_http2_request_upgrade(x,y) CURLE_UNSUPPORTED_PROTOCOL
  #define Curl_http2_setup(x) CURLE_UNSUPPORTED_PROTOCOL
  #define Curl_http2_switched(x) CURLE_UNSUPPORTED_PROTOCOL
  #endif
  
  #endif /* HEADER_CURL_HTTP2_H */
  
  