options: API for meta-data about easy options

 const struct curl_easyoption *curl_easy_option_by_name(const char *name);

 const struct curl_easyoption *curl_easy_option_by_id (CURLoption id);

 const struct curl_easyoption *
 curl_easy_option_next(const struct curl_easyoption *prev);

The purpose is to provide detailed enough information to allow for
example libcurl bindings to get option information at run-time about
what easy options that exist and what arguments they expect.

Assisted-by: Jeroen Ooms
Closes #5365

1 files changed, 35 insertions, 0 deletions

diff --git a/lib/easyoptions.h b/lib/easyoptions.h
new file mode 100644
index 000000000..4b681a47e
--- /dev/null
+++ b/lib/easyoptions.h
@@ -0,0 +1,35 @@
+#ifndef HEADER_CURL_EASYOPTIONS_H
+#define HEADER_CURL_EASYOPTIONS_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2020, 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 https://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.
+ *
+ ***************************************************************************/
+
+/* should probably go into the public header */
+
+#include <curl/curl.h>
+
+/* generated table with all easy options */
+extern struct curl_easyoption Curl_easyopts[];
+
+#ifdef CURLDEBUG
+int Curl_easyopts_check(void);
+#endif
+#endif