/*******************WARNING*********************

This is a *MODIFIED* version of Geoff Coller's proof-of-concept NOV
implementation.

It has been modified to support threading directly from a file handle
to a NNTP server without a temporary file.

This is not a complete distribution.  We have only distributed enough
to support NN's needs.

The original version came from world.std.com:/src/news/nov.dist.tar.Z
and was dated 11 Aug 1993.

In any case, bugs you find here are probably my fault, as I've trimmed
a fair bit of unused code.

-Peter Wemm  <peter@DIALix.oz.au>
*/

/*
 * Copyright (c) Geoffrey Collyer 1992, 1993.
 * All rights reserved.
 * Written by Geoffrey Collyer.
 * Thanks to UUNET Communications Services Inc for financial support.
 *
 * This software is not subject to any license of the American Telephone
 * and Telegraph Company, the Regents of the University of California, or
 * the Free Software Foundation.
 *
 * Permission is granted to anyone to use this software for any purpose on
 * any computer system, and to alter it and redistribute it freely, subject
 * to the following restrictions:
 *
 * 1. The authors are not responsible for the consequences of use of this
 *    software, no matter how awful, even if they arise from flaws in it.
 *
 * 2. The origin of this software must not be misrepresented, either by
 *    explicit claim or by omission.  Since few users ever read sources,
 *    credits must appear in the documentation.
 *
 * 3. Altered versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.  Since few users
 *    ever read sources, credits must appear in the documentation.
 *
 * 4. This notice may not be removed or altered.
 */


/* newsreader interface to news overview data */
struct novgroup {
	char *g_dir;
	FILE *g_stream;
	struct novart *g_first;
	struct novart *g_curr;
	HASHTABLE *g_msgids;
	HASHTABLE *g_roots;
};
struct novart {
	char *a_num;
	char *a_subj;
	char *a_from;
	char *a_date;
	char *a_msgid;
	char *a_refs;
	char *a_bytes;
	char *a_lines;
	char *a_others;
	/* these members are message-ids, filled in by novthread() */
	char *a_parent;
	char *a_child1;		/* first child of a chain */
	char *a_sibling;	/* next sibling in this chain */
	/* end message-ids */
	struct novart *a_nxtnum;	/* next in numeric order */
};

struct novgroup *novopen(), *novstream();	/* open a new group */
struct novart *novall(), *novnext(); /* return overview data for a group */
/* novthread(ngroup);		built threads linkage; see g_roots */
/* novclose(ngroup);		frees resources associated with ngroup */