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/* $Id: cache.h,v 3.0 1991/09/09 20:18:23 davison Trn $
*/
/* This software is Copyright 1991 by Stan Barber.
*
* Permission is hereby granted to copy, reproduce, redistribute or otherwise
* use this software as long as: there is no monetary profit gained
* specifically from the use or reproduction of this software, it is not
* sold, rented, traded or otherwise marketed, and this copyright notice is
* included prominently in any copy made.
*
* The authors make no claims as to the fitness or correctness of this software
* for any use whatsoever, and it is provided as is. Any use of this software
* is at the user's own risk.
*/
/* Subjects get their own structure */
typedef struct rt_subj {
struct rt_subj *next;
struct rt_subj *prev;
struct rt_art *articles;
struct rt_art *thread;
struct rt_subj *thread_link;
char *str;
time_t date;
short flags;
short misc; /* used for temporary totals and subject numbers */
} SUBJECT;
/* subject flags */
#define SF_SEL 0x0001
#define SF_DEL 0x0002
#define SF_DELSEL 0x0004
#define SF_OLDSEL 0x0008
#define SF_INCLUDED 0x0010
#define SF_VISIT 0x0200
#define SF_WASSELECTED 0x0400
#define SF_SUBJTRUNCED 0x1000
/* This is our article-caching structure */
typedef struct rt_art {
time_t date;
SUBJECT *subj;
char *from;
char *msgid;
char *xrefs;
struct rt_art *parent; /* parent article */
struct rt_art *child1; /* first child of a chain */
struct rt_art *sibling; /* our next sibling */
struct rt_art *subj_next; /* next article in subject order */
short flags; /* state flags */
short autofl; /* auto-processing flags */
} ARTICLE;
/* article flags */
#define AF_SEL 0x0001
#define AF_DEL 0x0002
#define AF_DELSEL 0x0004
#define AF_OLDSEL 0x0008
#define AF_INCLUDED 0x0010
#define AF_READ 0x0020
#define AF_CACHED 0x0040
#define AF_THREADED 0x0080
#define AF_MISSING 0x0100
#define AF_HAS_RE 0x0200
#define AF_KCHASE 0x0400
#define AF_MCHASE 0x0800
#define AF_YANKBACK 0x1000
#define AF_FROMTRUNCED 0x2000
#define AF_TMPMEM (0x4000|AF_MISSING)
#define AF_FAKE (0x8000|AF_MISSING)
#define AUTO_KILL 0x0001
#define AUTO_KILLALL 0x0002
#define AUTO_SELECT 0x0004
#define AUTO_SELECT1 0x0008
#define AUTO_SELECTALL 0x0010
/* The following define is only valid as a flag to the select_article call */
#define AUTO_ECHO 0x8000
#define Nullart Null(ARTICLE*)
#define Nullsubj Null(SUBJECT*)
#define was_read(a) ((a) < absfirst || (article_ptr(a)->flags & AF_READ))
/* These must never use their args more than once in the definition */
#define article_num(ap) (((ap)-article_list)+absfirst)
#define article_ptr(an) (article_list+((an)-absfirst))
#define find_article(an) ((an < absfirst || an > lastart)? \
Nullart : article_ptr(an))
EXT ARTICLE *article_list INIT(Nullart);
EXT ARTICLE **artptr_list INIT(0);
EXT ARTICLE **artptr;
EXT ART_NUM artptr_list_size INIT(0);
#ifdef ARTSEARCH
EXT ART_NUM srchahead INIT(0); /* are we in subject scan mode? */
/* (if so, contains art # found or -1) */
#endif
EXT ART_NUM first_cached;
EXT ART_NUM last_cached;
EXT bool cached_all_in_range;
EXT ARTICLE *sentinel_artp;
#define DONT_FILL_CACHE 0
#define FILL_CACHE 1
EXT struct rt_subj *first_subject INIT(0);
EXT struct rt_subj *last_subject INIT(0);
EXT bool untrim_cache INIT(FALSE);
#ifdef PENDING
EXT ART_NUM subj_to_get;
EXT ART_NUM xref_to_get;
#endif
void cache_init _((void));
void build_cache _((void));
void grow_cache _((ART_NUM));
void close_cache _((void));
void cache_article _((ARTICLE*));
void check_for_near_subj _((ARTICLE*));
void change_join_subject_len _((int));
void check_poster _((ARTICLE*));
void uncache_article _((ARTICLE*,bool_int));
char *fetchcache _((ART_NUM,int,bool_int));
char *get_cached_line _((ARTICLE*, int, bool_int));
void set_subj_line _((ARTICLE*, char*, int));
void set_cached_line _((ARTICLE*, int, char*));
void look_ahead _((void));
void cache_until_key _((void));
bool cache_subjects _((void));
bool cache_xrefs _((void));
bool cache_all_arts _((void));
bool cache_unread_arts _((void));
bool art_data _((ART_NUM,ART_NUM,bool_int,bool_int));
bool cache_range _((ART_NUM,ART_NUM));
void clear_article _((ARTICLE*));
void free_subject _((SUBJECT*));
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