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diff --git a/src/url.h b/src/url.h
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+/* Declarations for url.c.
+   Copyright (C) 1996-2011, 2015, 2018-2020 Free Software Foundation,
+   Inc.
+
+This file is part of GNU Wget.
+
+GNU Wget is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+GNU Wget is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Wget.  If not, see <http://www.gnu.org/licenses/>.
+
+Additional permission under GNU GPL version 3 section 7
+
+If you modify this program, or any covered work, by linking or
+combining it with the OpenSSL project's OpenSSL library (or a
+modified version of that library), containing parts covered by the
+terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
+grants you additional permission to convey the resulting work.
+Corresponding Source for a non-source form of such a combination
+shall include the source code for the parts of OpenSSL used as well
+as that of the covered work.  */
+
+#ifndef URL_H
+#define URL_H
+
+/* Default port definitions */
+#define DEFAULT_HTTP_PORT 80
+#define DEFAULT_FTP_PORT 21
+#define DEFAULT_HTTPS_PORT 443
+#define DEFAULT_FTPS_IMPLICIT_PORT 990
+
+/* This represents how many characters less than the OS max name length a file
+ * should be.  More precisely, a file name should be at most
+ * (NAME_MAX - CHOMP_BUFFER) characters in length.  This number was arrived at
+ * by adding the lengths of all possible strings that could be appended to a
+ * file name later in the code (e.g. ".orig", ".html", etc.).  This is
+ * hopefully plenty of extra characters, but I am not guaranteeing that a file
+ * name will be of the proper length by the time the code wants to open a
+ * file descriptor. */
+#define CHOMP_BUFFER 19
+
+/* The flags that allow clobbering the file (opening with "wb").
+   Defined here to avoid repetition later.  #### This will require
+   rework.  */
+#define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
+                  || opt.dirstruct || opt.output_document || opt.backups > 0)
+
+/* Specifies how, or whether, user auth information should be included
+ * in URLs regenerated from URL parse structures. */
+enum url_auth_mode {
+  URL_AUTH_SHOW,
+  URL_AUTH_HIDE_PASSWD,
+  URL_AUTH_HIDE
+};
+
+/* Note: the ordering here is related to the order of elements in
+   `supported_schemes' in url.c.  */
+
+enum url_scheme {
+  SCHEME_HTTP,
+#ifdef HAVE_SSL
+  SCHEME_HTTPS,
+#endif
+  SCHEME_FTP,
+#ifdef HAVE_SSL
+  SCHEME_FTPS,
+#endif
+  SCHEME_INVALID
+};
+
+/* Structure containing info on a URL.  */
+struct url
+{
+  char *url;                /* Original URL */
+  enum url_scheme scheme;   /* URL scheme */
+
+  char *host;               /* Extracted hostname */
+  int port;                 /* Port number */
+
+  /* URL components (URL-quoted). */
+  char *path;
+  char *params;
+  char *query;
+  char *fragment;
+
+  /* Extracted path info (unquoted). */
+  char *dir;
+  char *file;
+
+  /* Username and password (unquoted). */
+  char *user;
+  char *passwd;
+};
+
+/* Function declarations */
+
+char *url_escape (const char *);
+char *url_escape_unsafe_and_reserved (const char *);
+void url_unescape (char *);
+void url_unescape_except_reserved (char *);
+
+struct url *url_parse (const char *, int *, struct iri *iri, bool percent_encode);
+char *url_error (const char *, int);
+char *url_full_path (const struct url *);
+void url_set_dir (struct url *, const char *);
+void url_set_file (struct url *, const char *);
+void url_free (struct url *);
+
+enum url_scheme url_scheme (const char *);
+bool url_has_scheme (const char *);
+bool url_valid_scheme (const char *);
+int scheme_default_port (enum url_scheme);
+void scheme_disable (enum url_scheme);
+const char *scheme_leading_string (enum url_scheme);
+
+char *url_string (const struct url *, enum url_auth_mode);
+char *url_file_name (const struct url *, char *);
+
+char *uri_merge (const char *, const char *);
+
+int mkalldirs (const char *);
+
+char *rewrite_shorthand_url (const char *);
+bool schemes_are_similar_p (enum url_scheme a, enum url_scheme b);
+
+bool are_urls_equal (const char *u1, const char *u2);
+
+#endif /* URL_H */