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/* bits.c
*/
/* This software is copyrighted as detailed in the LICENSE file. */
#include "EXTERN.h"
#include "common.h"
#include "hash.h"
#include "cache.h"
#include "list.h"
#include "ngdata.h"
#include "nntpclient.h"
#include "datasrc.h"
#include "nntp.h"
#include "rcstuff.h"
#include "head.h"
#include "term.h"
#include "util.h"
#include "util2.h"
#include "final.h"
#include "trn.h"
#include "ng.h"
#include "artio.h"
#include "intrp.h"
#include "rcln.h"
#include "ndir.h"
#include "kfile.h"
#include "rthread.h"
#include "rt-process.h"
#include "rt-select.h"
#include "rt-util.h"
#include "INTERN.h"
#include "bits.h"
#include "bits.ih"
#ifdef DBM_XREFS
# ifdef NULL
# undef NULL
# endif
# include <dbm.h>
#endif
static long chase_count = 0;
void
bits_init()
{
;
}
void
rc_to_bits()
{
char* mybuf = buf; /* place to decode rc line */
register char* s;
register char* c;
register char* h;
register long i;
register ART_NUM unread;
ARTICLE* ap;
/* modify the article flags to reflect what has already been read */
for (s = ngptr->rcline + ngptr->numoffset; *s == ' '; s++) ;
/* find numbers in rc line */
i = strlen(s);
#ifndef lint
if (i >= LBUFLEN-2) /* bigger than buf? */
mybuf = safemalloc((MEM_SIZE)(i+2));
#endif
strcpy(mybuf,s); /* make scratch copy of line */
if (mybuf[0])
mybuf[i++] = ','; /* put extra comma on the end */
mybuf[i] = '\0';
s = mybuf; /* initialize the for loop below */
if (set_firstart(s)) {
s = index(s,',') + 1;
for (i = article_first(absfirst); i < firstart; i = article_next(i))
article_ptr(i)->flags &= ~AF_UNREAD;
firstart = i;
}
else
firstart = article_first(firstart);
unread = 0;
#ifdef DEBUG
if (debug & DEB_CTLAREA_BITMAP) {
printf("\n%s\n",mybuf) FLUSH;
termdown(2);
for (i = article_first(absfirst); i < firstart; i = article_next(i)) {
if (article_unread(i))
printf("%ld ",(long)i) FLUSH;
}
}
#endif
i = firstart;
for ( ; (c = index(s,',')) != NULL; s = ++c) { /* for each range */
ART_NUM min, max;
*c = '\0'; /* do not let index see past comma */
h = index(s,'-');
min = atol(s);
if (min < firstart) /* make sure range is in range */
min = firstart;
if (min > lastart)
min = lastart+1;
for (; i < min; i = article_next(i)) {
ap = article_ptr(i);
if (ap->flags & AF_EXISTS) {
if (ap->autofl & AUTO_KILLS)
ap->flags &= ~AF_UNREAD;
else {
ap->flags |= AF_UNREAD;
unread++;
if (ap->autofl & AUTO_SELS)
select_article(ap, ap->autofl);
}
}
}
if (!h)
max = min;
else if ((max = atol(h+1)) < min)
max = min-1;
if (max > lastart)
max = lastart;
/* mark all arts in range as read */
for ( ; i <= max; i = article_next(i))
article_ptr(i)->flags &= ~AF_UNREAD;
#ifdef DEBUG
if (debug & DEB_CTLAREA_BITMAP) {
printf("\n%s\n",s) FLUSH;
termdown(2);
for (i = absfirst; i <= lastart; i++) {
if (!was_read(i))
printf("%ld ",(long)i) FLUSH;
}
}
#endif
i = article_next(max);
}
for (; i <= lastart; i = article_next(i)) {
ap = article_ptr(i);
if (ap->flags & AF_EXISTS) {
if (ap->autofl & AUTO_KILLS)
ap->flags &= ~AF_UNREAD;
else {
ap->flags |= AF_UNREAD;
unread++;
if (ap->autofl & AUTO_SELS)
select_article(ap, ap->autofl);
}
}
}
#ifdef DEBUG
if (debug & DEB_CTLAREA_BITMAP) {
fputs("\n(hit CR)",stdout) FLUSH;
termdown(1);
fgets(cmd_buf, sizeof cmd_buf, stdin);
}
#endif
if (mybuf != buf)
free(mybuf);
ngptr->toread = unread;
}
bool
set_firstart(s)
char* s;
{
while (*s == ' ') s++;
if (strnEQ(s,"1-",2)) { /* can we save some time here? */
firstart = atol(s+2)+1; /* process first range thusly */
if (firstart < absfirst)
firstart = absfirst;
return TRUE;
}
firstart = absfirst;
return FALSE;
}
/* reconstruct the .newsrc line in a human readable form */
void
bits_to_rc()
{
register char* s;
register char* mybuf = buf;
register ART_NUM i;
ART_NUM count=0;
int safelen = LBUFLEN - 32;
strcpy(buf,ngptr->rcline); /* start with the newsgroup name */
s = buf + ngptr->numoffset - 1; /* use s for buffer pointer */
*s++ = ngptr->subscribechar; /* put the requisite : or !*/
for (i = article_first(absfirst); i <= lastart; i = article_next(i)) {
if (article_unread(i))
break;
}
sprintf(s," 1-%ld,",(long)i-1);
s += strlen(s);
for (; i<=lastart; i++) { /* for each article in newsgroup */
if (s-mybuf > safelen) { /* running out of room? */
safelen *= 2;
if (mybuf == buf) { /* currently static? */
*s = '\0';
mybuf = safemalloc((MEM_SIZE)safelen + 32);
strcpy(mybuf,buf); /* so we must copy it */
s = mybuf + (s-buf);
/* fix the pointer, too */
}
else { /* just grow in place, if possible */
int oldlen = s - mybuf;
mybuf = saferealloc(mybuf,(MEM_SIZE)safelen + 32);
s = mybuf + oldlen;
}
}
if (!was_read(i)) /* still unread? */
count++; /* then count it */
else { /* article was read */
ART_NUM oldi;
sprintf(s,"%ld",(long)i); /* put out the min of the range */
s += strlen(s); /* keeping house */
oldi = i; /* remember this spot */
do i++; while (i <= lastart && was_read(i));
/* find 1st unread article or end */
i--; /* backup to last read article */
if (i > oldi) { /* range of more than 1? */
sprintf(s,"-%ld,",(long)i);
/* then it out as a range */
s += strlen(s); /* and housekeep */
}
else
*s++ = ','; /* otherwise, just a comma will do */
}
}
if (*(s-1) == ',') /* is there a final ','? */
s--; /* take it back */
*s++ = '\0'; /* and terminate string */
#ifdef DEBUG
if ((debug & DEB_NEWSRC_LINE) && !panic) {
printf("%s: %s\n",ngptr->rcline,ngptr->rcline+ngptr->numoffset) FLUSH;
printf("%s\n",mybuf) FLUSH;
termdown(2);
}
#endif
free(ngptr->rcline); /* return old rc line */
if (mybuf == buf) {
ngptr->rcline = safemalloc((MEM_SIZE)(s-buf)+1);
/* grab a new rc line */
strcpy(ngptr->rcline, buf); /* and load it */
}
else {
mybuf = saferealloc(mybuf,(MEM_SIZE)(s-mybuf)+1);
/* be nice to the heap */
ngptr->rcline = mybuf;
}
*(ngptr->rcline + ngptr->numoffset - 1) = '\0';
if (ngptr->subscribechar == NEGCHAR)/* did they unsubscribe? */
ngptr->toread = TR_UNSUB; /* make line invisible */
else
ngptr->toread = (ART_UNREAD)count; /* otherwise, remember the count */
ngptr->rc->flags |= RF_RCCHANGED;
}
void
find_existing_articles()
{
ART_NUM an;
ARTICLE* ap;
#ifdef SUPPORT_NNTP
if (datasrc->flags & DF_REMOTE) {
/* Parse the LISTGROUP output and remember everything we find */
if (/*nntp_rover() ||*/ nntp_artnums()) {
/*char* s;*/
for (ap = article_ptr(article_first(absfirst));
ap && article_num(ap) <= lastart;
ap = article_nextp(ap))
ap->flags &= ~AF_EXISTS;
for (;;) {
if (nntp_gets(ser_line, sizeof ser_line) < 0)
break; /*$$*/
if (nntp_at_list_end(ser_line))
break;
an = (ART_NUM)atol(ser_line);
if (an < absfirst)
continue; /* Ignore some wacked-out NNTP servers */
ap = article_ptr(an);
if (!(ap->flags2 & AF2_BOGUS))
ap->flags |= AF_EXISTS;
#if 0
s = index(ser_line, ' ');
if (s)
rover_thread(article_ptr(an), s);
#endif
}
}
else if (first_subject && cached_all_in_range) {
if (!datasrc->ov_opened || datasrc->over_dir != NULL) {
for (ap = article_ptr(article_first(first_cached));
ap && article_num(ap) <= last_cached;
ap = article_nextp(ap))
{
if (ap->flags & AF_CACHED)
ap->flags |= AF_EXISTS;
}
}
for (an = absfirst; an < first_cached; an++) {
ap = article_ptr(an);
if (!(ap->flags2 & AF2_BOGUS))
ap->flags |= AF_EXISTS;
}
for (an = last_cached+1; an <= lastart; an++) {
ap = article_ptr(an);
if (!(ap->flags2 & AF2_BOGUS))
ap->flags |= AF_EXISTS;
}
}
else {
for (an = absfirst; an <= lastart; an++) {
ap = article_ptr(an);
if (!(ap->flags2 & AF2_BOGUS))
ap->flags |= AF_EXISTS;
}
}
}
else
#endif
{
ART_NUM first = lastart+1;
ART_NUM last = 0;
DIR* dirp;
Direntry_t* dp;
char ch;
long lnum;
/* Scan the directory to find which articles are present. */
if (!(dirp = opendir(".")))
return;
for (ap = article_ptr(article_first(absfirst));
ap && article_num(ap) <= lastart;
ap = article_nextp(ap))
ap->flags &= ~AF_EXISTS;
while ((dp = readdir(dirp)) != NULL) {
if (sscanf(dp->d_name, "%ld%c", &lnum, &ch) == 1) {
an = (ART_NUM)lnum;
if (an <= lastart && an >= absfirst) {
if (an < first)
first = an;
if (an > last)
last = an;
ap = article_ptr(an);
if (!(ap->flags2 & AF2_BOGUS))
ap->flags |= AF_EXISTS;
}
}
}
closedir(dirp);
ngptr->abs1st = first;
ngptr->ngmax = last;
if (first > absfirst) {
checkexpired(ngptr,first);
for (absfirst = article_first(absfirst);
absfirst < first;
absfirst = article_next(absfirst))
{
onemissing(article_ptr(absfirst));
}
absfirst = first;
}
lastart = last;
}
if (firstart < absfirst)
firstart = absfirst;
if (firstart > lastart)
firstart = lastart + 1;
if (first_cached < absfirst)
first_cached = absfirst;
if (last_cached < absfirst)
last_cached = absfirst - 1;
}
/* mark an article unread, keeping track of toread[] */
void
onemore(ap)
ARTICLE* ap;
{
if (!(ap->flags & AF_UNREAD)) {
register ART_NUM artnum = article_num(ap);
check_first(artnum);
ap->flags |= AF_UNREAD;
ap->flags &= ~AF_DEL;
ngptr->toread++;
if (ap->subj) {
if (selected_only) {
if (ap->subj->flags & sel_mask) {
ap->flags |= sel_mask;
selected_count++;
}
} else
ap->subj->flags |= SF_VISIT;
}
}
}
/* mark an article read, keeping track of toread[] */
void
oneless(ap)
ARTICLE* ap;
{
if (ap->flags & AF_UNREAD) {
ap->flags &= ~AF_UNREAD;
/* Keep selected_count accurate */
if (ap->flags & sel_mask) {
selected_count--;
ap->flags &= ~sel_mask;
}
if (ngptr->toread > TR_NONE)
ngptr->toread--;
}
}
void
oneless_artnum(artnum)
ART_NUM artnum;
{
ARTICLE* ap = article_find(artnum);
if (ap)
oneless(ap);
}
void
onemissing(ap)
ARTICLE* ap;
{
missing_count += (ap->flags & AF_UNREAD) != 0;
oneless(ap);
ap->flags = (ap->flags & ~(AF_HAS_RE|AF_YANKBACK|AF_FROMTRUNCED|AF_EXISTS))
| AF_CACHED|AF_THREADED;
}
/* mark an article as unread, with possible xref chasing */
void
unmark_as_read(ap)
register ARTICLE* ap;
{
onemore(ap);
#ifdef MCHASE
if (ap->xrefs != nullstr && !(ap->flags & AF_MCHASE)) {
ap->flags |= AF_MCHASE;
chase_count++;
}
#endif
}
/* Mark an article as read in this newsgroup and possibly chase xrefs.
** Don't call this on missing articles.
*/
void
set_read(ap)
register ARTICLE* ap;
{
oneless(ap);
if (!olden_days && ap->xrefs != nullstr && !(ap->flags & AF_KCHASE)) {
ap->flags |= AF_KCHASE;
chase_count++;
}
}
/* temporarily mark article as read. When newsgroup is exited, articles */
/* will be marked as unread. Called via M command */
void
delay_unmark(ap)
ARTICLE* ap;
{
if (!(ap->flags & AF_YANKBACK)) {
ap->flags |= AF_YANKBACK;
dmcount++;
}
}
/* mark article as read. If article is cross referenced to other */
/* newsgroups, mark them read there also. */
void
mark_as_read(ap)
register ARTICLE* ap;
{
oneless(ap);
if (ap->xrefs != nullstr && !(ap->flags & AF_KCHASE)) {
ap->flags |= AF_KCHASE;
chase_count++;
}
checkcount++; /* get more worried about crashes */
}
void
mark_missing_articles()
{
register ARTICLE* ap;
for (ap = article_ptr(article_first(absfirst));
ap && article_num(ap) <= lastart;
ap = article_nextp(ap))
{
if (!(ap->flags & AF_EXISTS))
onemissing(ap);
}
}
/* keep firstart pointing at the first unread article */
void
check_first(min)
ART_NUM min;
{
if (min < absfirst)
min = absfirst;
if (min < firstart)
firstart = min;
}
/* bring back articles marked with M */
void
yankback()
{
if (dmcount) { /* delayed unmarks pending? */
if (panic)
;
else if (gmode == 's')
sprintf(msg, "Returned %ld Marked article%s.",(long)dmcount,
PLURAL(dmcount));
else {
#ifdef VERBOSE
printf("\nReturning %ld Marked article%s...\n",(long)dmcount,
PLURAL(dmcount)) FLUSH;
#endif
termdown(2);
}
article_walk(yank_article, 0);
dmcount = 0;
}
}
static bool
yank_article(ptr, arg)
char* ptr;
int arg;
{
register ARTICLE* ap = (ARTICLE*)ptr;
if (ap->flags & AF_YANKBACK) {
unmark_as_read(ap);
if (selected_only)
select_article(ap, 0);
ap->flags &= ~AF_YANKBACK;
}
return 0;
}
int
chase_xrefs(until_key)
bool_int until_key;
{
if (!chase_count)
return 1;
if (until_key)
setspin(SPIN_BACKGROUND);
article_walk(check_chase, until_key);
chase_count = 0;
return 1;
}
static bool
check_chase(ptr, until_key)
char* ptr;
int until_key;
{
register ARTICLE* ap = (ARTICLE*)ptr;
if (ap->flags & AF_KCHASE) {
chase_xref(article_num(ap),TRUE);
ap->flags &= ~AF_KCHASE;
if (!--chase_count)
return 1;
}
#ifdef MCHASE
if (ap->flags & AF_MCHASE) {
chase_xref(article_num(ap),TRUE);
ap->flags &= ~AF_MCHASE;
if (!--chase_count)
return 1;
}
#endif
if (until_key && input_pending())
return 1;
return 0;
}
/* run down xref list and mark as read or unread */
#ifndef DBM_XREFS
/*=-=-=-=*/
static int
chase_xref(artnum,markread) /* The Xref-line-using version */
ART_NUM artnum;
int markread;
{
register char* xartnum;
register ART_NUM x;
char* xref_buf, *curxref;
char tmpbuf[128];
if (datasrc->flags & DF_NOXREFS)
return 0;
if (inbackground())
spin(10);
else {
if (output_chase_phrase) {
# ifdef VERBOSE
IF(verbose)
fputs("\nChasing xrefs", stdout);
ELSE
# endif
# ifdef TERSE
fputs("\nXrefs", stdout);
# endif
termdown(1);
output_chase_phrase = 0;
}
putchar('.');
fflush(stdout);
}
xref_buf = fetchcache(artnum, XREF_LINE, FILL_CACHE);
if (!xref_buf || !*xref_buf)
return 0;
xref_buf = savestr(xref_buf);
# ifdef DEBUG
if (debug & DEB_XREF_MARKER) {
printf("Xref: %s\n",xref_buf) FLUSH;
termdown(1);
}
# endif
curxref = cpytill(tmpbuf,xref_buf,' ') + 1;
# ifdef VALIDATE_XREF_SITE
if (valid_xref_site(artnum,tmpbuf))
# endif
{
while (*curxref) { /* for each newsgroup */
curxref = cpytill(tmpbuf,curxref,' ');
xartnum = index(tmpbuf,':');
if (!xartnum)
break;
*xartnum++ = '\0';
if (!(x = atol(xartnum)))
continue;
if (strEQ(tmpbuf,ngname)) {/* is this the current newsgroup? */
if (x < absfirst || x > lastart)
continue;
if (markread)
oneless(article_ptr(x)); /* take care of old C newses */
# ifdef MCHASE
else
onemore(article_ptr(x));
# endif
} else {
if (markread) {
if (addartnum(datasrc,x,tmpbuf))
break;
}
# ifdef MCHASE
else
subartnum(datasrc,x,tmpbuf);
# endif
}
while (*curxref && isspace(*curxref))
curxref++;
}
}
free(xref_buf);
return 0;
}
/* Make sure the site name on Xref matches what inews thinks the site
* is. Check first against last inews_site. If it matches, fine.
* If not, fetch inews_site from current Path or Relay-Version line and
* check again. This is so that if the new administrator decides
* to change the system name as known to inews, rn will still do
* Xrefs correctly--each article need only match itself to be valid.
*/
# ifdef VALIDATE_XREF_SITE
static bool
valid_xref_site(artnum, site)
ART_NUM artnum;
char* site;
{
static char* inews_site = NULL;
char* sitebuf;
char* s;
if (inews_site && strEQ(site,inews_site))
return TRUE;
if (inews_site)
free(inews_site);
#ifndef ANCIENT_NEWS
/* Grab the site from the first component of the Path line */
sitebuf = fetchlines(artnum,PATH_LINE);
if ((s = index(sitebuf, '!')) != NULL) {
*s = '\0';
inews_site = savestr(sitebuf);
}
#else /* ANCIENT_NEWS */
/* Grab the site from the Posting-Version line */
sitebuf = fetchlines(artnum,RVER_LINE);
if ((s = instr(sitebuf,"; site ",TRUE)) != NULL) {
char* t = index(s+7, '.');
if (t)
*t = '\0';
inews_site = savestr(s+7);
}
#endif /* ANCIENT_NEWS */
else
inews_site = savestr(nullstr);
free(sitebuf);
if (strEQ(site,inews_site))
return TRUE;
#ifdef DEBUG
if (debug) {
printf("Xref not from %s -- ignoring\n",inews_site) FLUSH;
termdown(1);
}
#endif
return FALSE;
}
# endif /* VALIDATE_XREF_SITE */
#else /* DBM_XREFS */
static int
chase_xref(artnum,markread) /* The DBM version */
ART_NUM artnum;
int markread;
{
datum lhs, rhs;
datum fetch();
register char* idp;
char* ident_buf;
static FILE* hist_file = NULL;
long pos;
register char* xartnum;
register ART_NUM x;
char* xref_buf;
char* curxref;
char tmpbuf[128];
if (datasrc->flags & DF_NOXREFS)
return;
if (inbackground())
spin(10);
else {
if (output_chase_phrase) {
# ifdef VERBOSE
IF(verbose)
fputs("\nChasing xrefs", stdout);
ELSE
# endif
# ifdef TERSE
fputs("\nXrefs", stdout);
# endif
termdown(1);
output_chase_phrase = 0;
}
putchar('.');
fflush(stdout);
}
xref_buf = fetchcache(artnum, NGS_LINE, FILL_CACHE);
if (!xref_buf || !*xref_buf)
return 0;
xref_buf = safemalloc((MEM_SIZE)BUFSIZ);
if (hist_file == NULL) { /* Init. file accesses */
# ifdef DEBUG
if (debug) {
printf("chase_xref: opening files\n");
termdown(1);
}
# endif
dbminit(filexp(ARTFILE));
if ((hist_file = fopen(filexp(ARTFILE), "r")) == NULL)
return 0;
}
ident_buf = fetchlines(artnum,MSGID_LINE); /* get Message-ID */
# ifdef DEBUG
if (debug) {
printf ("chase_xref: Message-ID: %s\n", ident_buf);
termdown(1);
}
# endif
if ((idp = index(ident_buf, '@')) != NULL) {
while (*++idp) /* make message-id case insensitive */
if (isupper(*idp))
*idp = tolower(*idp);
}
lhs.dptr = ident_buf; /* look up article by id */
lhs.dsize = strlen(lhs.dptr) + 1;
rhs = fetch(lhs); /* fetch the record */
if (rhs.dptr == NULL) /* if NULL, nothing there */
goto wild_goose;
bcopy(rhs.dptr,(char*)&pos, 4);
fseek(hist_file, pos, 0); /* datum returned is position in hist file */
fgets(xref_buf, BUFSIZ, hist_file);
# ifdef DEBUG
if (debug) {
printf ("Xref from history: %s\n", xref_buf);
termdown(1);
}
# endif
curxref = cpytill(tmpbuf, xref_buf, '\t') + 1;
curxref = cpytill(tmpbuf, curxref, '\t') + 1;
# ifdef DEBUG
if (debug) {
printf ("chase_xref: curxref: %s\n", curxref);
termdown(1);
}
# endif
while (*curxref) { /* for each newsgroup */
curxref = cpytill(tmpbuf,curxref,' ');
xartnum = index(tmpbuf,'/');
if (!xartnum) /* probably an old-style Xref */
break;
*xartnum++ = '\0';
if (!(x = atol(xartnum)))
continue;
if (strNE(tmpbuf,ngname)) { /* not the current newsgroup? */
if (markread) {
if (addartnum(datasrc,x,tmpbuf))
goto wild_goose;
}
# ifdef MCHASE
else
subartnum(datasrc,x,tmpbuf);
# endif
}
while (*curxref && isspace(*curxref))
curxref++;
}
wild_goose:
free(xref_buf);
free(ident_buf);
return 0;
}
#endif /* DBM_XREFS */
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