3 * sortm.c -- sort messages in a folder by date/time
7 * This code is Copyright (c) 2002, by the authors of nmh. See the
8 * COPYRIGHT file in the root directory of the nmh distribution for
9 * complete copyright information.
17 * We allocate space for messages (msgs array)
18 * this number of elements at a time.
23 static struct swit switches[] = {
25 { "datefield field", 0 },
27 { "textfield field", 0 },
31 { "subject", -3 }, /* backward-compatibility */
53 static struct smsg *smsgs;
56 char *subjsort = (char *) 0; /* sort on subject if != 0 */
57 unsigned long datelimit = 0;
58 int submajor = 0; /* if true, sort on subject-major */
61 /* This keeps compiler happy on calls to qsort */
62 typedef int (*qsort_comp) (const void *, const void *);
67 static int read_hdrs (struct msgs *, char *);
68 static int get_fields (char *, int, struct smsg *);
69 static int dsort (struct smsg **, struct smsg **);
70 static int subsort (struct smsg **, struct smsg **);
71 static int txtsort (struct smsg **, struct smsg **);
72 static void rename_chain (struct msgs *, struct smsg **, int, int);
73 static void rename_msgs (struct msgs *, struct smsg **);
77 main (int argc, char **argv)
79 int nummsgs, maxmsgs, i, msgnum;
80 char *cp, *maildir, *datesw = NULL;
81 char *folder = NULL, buf[BUFSIZ], **argp;
82 char **arguments, **msgs;
87 setlocale(LC_ALL, "");
89 invo_name = r1bindex (argv[0], '/');
91 /* read user profile/context */
94 arguments = getarguments (invo_name, argc, argv, 1);
98 * Allocate the initial space to record message
103 msgs = (char **) mh_xmalloc ((size_t) (maxmsgs * sizeof(*msgs)));
108 while ((cp = *argp++)) {
110 switch (smatch (++cp, switches)) {
112 ambigsw (cp, switches);
115 adios (NULL, "-%s unknown", cp);
118 snprintf(buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
120 print_help (buf, switches, 1);
123 print_version(invo_name);
128 adios (NULL, "only one date field at a time");
129 if (!(datesw = *argp++) || *datesw == '-')
130 adios (NULL, "missing argument to %s", argp[-2]);
135 adios (NULL, "only one text field at a time");
136 if (!(subjsort = *argp++) || *subjsort == '-')
137 adios (NULL, "missing argument to %s", argp[-2]);
141 subjsort = "subject";
144 subjsort = (char *)0;
148 if (!(cp = *argp++) || *cp == '-')
149 adios (NULL, "missing argument to %s", argp[-2]);
151 cp++; /* skip any leading zeros */
152 if (!*cp) { /* hit end of string */
153 submajor++; /* sort subject-major */
156 if (!isdigit(*cp) || !(datelimit = atoi(cp)))
157 adios (NULL, "impossible limit %s", cp);
158 datelimit *= 60*60*24;
161 submajor = 0; /* use date-major, but */
162 datelimit = 0; /* use no limit */
173 if (*cp == '+' || *cp == '@') {
175 adios (NULL, "only one folder at a time!");
177 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
180 * Check if we need to allocate more space
181 * for message names/ranges.
183 if (nummsgs >= maxmsgs) {
185 msgs = (char **) mh_xrealloc (msgs,
186 (size_t) (maxmsgs * sizeof(*msgs)));
188 msgs[nummsgs++] = cp;
192 if (!context_find ("path"))
193 free (path ("./", TFOLDER));
195 msgs[nummsgs++] = "all";
199 folder = getfolder (1);
200 maildir = m_maildir (folder);
202 if (chdir (maildir) == NOTOK)
203 adios (maildir, "unable to change directory to");
205 /* read folder and create message structure */
206 if (!(mp = folder_read (folder)))
207 adios (NULL, "unable to read folder %s", folder);
209 /* check for empty folder */
211 adios (NULL, "no messages in %s", folder);
213 /* parse all the message ranges/sequences and set SELECTED */
214 for (msgnum = 0; msgnum < nummsgs; msgnum++)
215 if (!m_convert (mp, msgs[msgnum]))
217 seq_setprev (mp); /* set the previous sequence */
219 if ((nmsgs = read_hdrs (mp, datesw)) <= 0)
220 adios (NULL, "no messages to sort");
223 * sort a list of pointers to our "messages to be sorted".
225 dlist = (struct smsg **) mh_xmalloc ((nmsgs+1) * sizeof(*dlist));
226 for (i = 0; i < nmsgs; i++)
227 dlist[i] = &smsgs[i];
230 if (verbose) { /* announce what we're doing */
232 printf ("sorting by %s-major %s-minor\n",
233 submajor ? subjsort : datesw,
234 submajor ? datesw : subjsort);
236 printf ("sorting by datefield %s\n", datesw);
239 /* first sort by date, or by subject-major, date-minor */
240 qsort ((char *) dlist, nmsgs, sizeof(*dlist),
241 (qsort_comp) (submajor && subjsort ? txtsort : dsort));
244 * if we're sorting on subject, we need another list
245 * in subject order, then a merge pass to collate the
248 if (!submajor && subjsort) { /* already date sorted */
249 struct smsg **slist, **flist;
250 register struct smsg ***il, **fp, **dp;
252 slist = (struct smsg **) mh_xmalloc ((nmsgs+1) * sizeof(*slist));
253 memcpy((char *)slist, (char *)dlist, (nmsgs+1)*sizeof(*slist));
254 qsort((char *)slist, nmsgs, sizeof(*slist), (qsort_comp) subsort);
257 * make an inversion list so we can quickly find
258 * the collection of messages with the same subj
259 * given a message number.
261 il = (struct smsg ***) calloc (mp->hghsel+1, sizeof(*il));
263 adios (NULL, "couldn't allocate msg list");
264 for (i = 0; i < nmsgs; i++)
265 il[slist[i]->s_msg] = &slist[i];
267 * make up the final list, chronological but with
268 * all the same subjects grouped together.
270 flist = (struct smsg **) mh_xmalloc ((nmsgs+1) * sizeof(*flist));
272 for (dp = dlist; *dp;) {
273 register struct smsg **s = il[(*dp++)->s_msg];
275 /* see if we already did this guy */
281 * take the next message(s) if there is one,
282 * its subject isn't null and its subject
283 * is the same as this one and it's not too
286 while (*s && (*s)->s_subj[0] &&
287 strcmp((*s)->s_subj, s[-1]->s_subj) == 0 &&
289 (*s)->s_clock - s[-1]->s_clock <= datelimit)) {
301 * At this point, dlist is a sorted array of pointers to smsg structures,
302 * each of which contains a message number.
305 rename_msgs (mp, dlist);
307 context_replace (pfolder, folder); /* update current folder */
308 seq_save (mp); /* synchronize message sequences */
309 context_save (); /* save the context file */
310 folder_free (mp); /* free folder/message structure */
315 read_hdrs (struct msgs *mp, char *datesw)
319 register struct smsg *s;
321 twscopy (&tb, dlocaltimenow ());
323 smsgs = (struct smsg *)
324 calloc ((size_t) (mp->hghsel - mp->lowsel + 2),
327 adios (NULL, "unable to allocate sort storage");
330 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
331 if (is_selected(mp, msgnum)) {
332 if (get_fields (datesw, msgnum, s)) {
344 * Parse the message and get the data or subject field,
349 get_fields (char *datesw, int msg, struct smsg *smsg)
353 char *msgnam, buf[BUFSIZ], nam[NAMESZ];
354 register struct tws *tw;
355 register char *datecomp = NULL, *subjcomp = NULL;
358 if ((in = fopen (msgnam = m_name (msg), "r")) == NULL) {
359 admonish (msgnam, "unable to read message");
362 for (compnum = 1, state = FLD;;) {
363 switch (state = m_getfld (state, nam, buf, sizeof(buf), in)) {
368 if (!strcasecmp (nam, datesw)) {
369 datecomp = add (buf, datecomp);
370 while (state == FLDPLUS) {
371 state = m_getfld (state, nam, buf, sizeof(buf), in);
372 datecomp = add (buf, datecomp);
374 if (!subjsort || subjcomp)
376 } else if (subjsort && !strcasecmp (nam, subjsort)) {
377 subjcomp = add (buf, subjcomp);
378 while (state == FLDPLUS) {
379 state = m_getfld (state, nam, buf, sizeof(buf), in);
380 subjcomp = add (buf, subjcomp);
385 /* just flush this guy */
386 while (state == FLDPLUS)
387 state = m_getfld (state, nam, buf, sizeof(buf), in);
398 if (state == LENERR || state == FMTERR)
399 admonish (NULL, "format error in message %d (header #%d)",
409 adios (NULL, "internal error -- you lose");
415 * If no date component, then use the modification
416 * time of the file as its date
418 if (!datecomp || (tw = dparsetime (datecomp)) == NULL) {
421 admonish (NULL, "can't parse %s field in message %d", datesw, msg);
422 fstat (fileno (in), &st);
423 smsg->s_clock = st.st_mtime;
425 smsg->s_clock = dmktime (tw);
431 * try to make the subject "canonical": delete
432 * leading "re:", everything but letters & smash
433 * letters to lower case.
435 register char *cp, *cp2, c;
439 if (strcmp (subjsort, "subject") == 0) {
451 while ((c = *cp++)) {
453 *cp2++ = isupper(c) ? tolower(c) : c;
461 smsg->s_subj = subjcomp;
474 dsort (struct smsg **a, struct smsg **b)
476 if ((*a)->s_clock < (*b)->s_clock)
478 else if ((*a)->s_clock > (*b)->s_clock)
480 else if ((*a)->s_msg < (*b)->s_msg)
490 subsort (struct smsg **a, struct smsg **b)
494 if ((i = strcmp ((*a)->s_subj, (*b)->s_subj)))
497 return (dsort (a, b));
501 txtsort (struct smsg **a, struct smsg **b)
505 if ((i = strcmp ((*a)->s_subj, (*b)->s_subj)))
507 else if ((*a)->s_msg < (*b)->s_msg)
514 rename_chain (struct msgs *mp, struct smsg **mlist, int msg, int endmsg)
517 char *newname, oldname[BUFSIZ];
518 char newbuf[MAXPATHLEN + 1];
521 nxt = mlist[msg] - smsgs; /* mlist[msg] is a ptr into smsgs */
522 mlist[msg] = (struct smsg *)0;
523 old = smsgs[nxt].s_msg;
524 new = smsgs[msg].s_msg;
525 strncpy (oldname, m_name (old), sizeof(oldname));
526 newname = m_name (new);
528 printf ("message %d becomes message %d\n", old, new);
530 (void)snprintf(oldname, sizeof (oldname), "%s/%d", mp->foldpath, old);
531 (void)snprintf(newbuf, sizeof (newbuf), "%s/%d", mp->foldpath, new);
532 ext_hook("ref-hook", oldname, newbuf);
534 if (rename (oldname, newname) == NOTOK)
535 adios (newname, "unable to rename %s to", oldname);
537 copy_msg_flags (mp, new, old);
538 if (mp->curmsg == old)
539 seq_setcur (mp, new);
546 /* if (nxt != endmsg); */
547 /* rename_chain (mp, mlist, nxt, endmsg); */
551 rename_msgs (struct msgs *mp, struct smsg **mlist)
555 char f1[BUFSIZ], tmpfil[BUFSIZ];
556 char newbuf[MAXPATHLEN + 1];
559 strncpy (tmpfil, m_name (mp->hghmsg + 1), sizeof(tmpfil));
561 for (i = 0; i < nmsgs; i++) {
562 if (! (sp = mlist[i]))
563 continue; /* did this one */
567 continue; /* this one doesn't move */
570 * the guy that was msg j is about to become msg i.
571 * rename 'j' to make a hole, then recursively rename
572 * guys to fill up the hole.
574 old = smsgs[j].s_msg;
575 new = smsgs[i].s_msg;
576 strncpy (f1, m_name (old), sizeof(f1));
579 printf ("renaming message chain from %d to %d\n", old, new);
582 * Run the external hook to refile the old message as the
583 * temporary message number that is off of the end of the
584 * messages in the folder.
587 (void)snprintf(f1, sizeof (f1), "%s/%d", mp->foldpath, old);
588 (void)snprintf(newbuf, sizeof (newbuf), "%s/%d", mp->foldpath, mp->hghmsg + 1);
589 ext_hook("ref-hook", f1, newbuf);
591 if (rename (f1, tmpfil) == NOTOK)
592 adios (tmpfil, "unable to rename %s to ", f1);
594 get_msg_flags (mp, &tmpset, old);
596 rename_chain (mp, mlist, j, i);
599 * Run the external hook to refile the temorary message number
603 (void)snprintf(f1, sizeof (f1), "%s/%d", mp->foldpath, new);
604 ext_hook("ref-hook", newbuf, f1);
606 if (rename (tmpfil, m_name(new)) == NOTOK)
607 adios (m_name(new), "unable to rename %s to", tmpfil);
609 set_msg_flags (mp, &tmpset, new);
610 mp->msgflags |= SEQMOD;