diplodocus.org Git - nmh/blob - sbr/folder_pack.c

   1 /* folder_pack.c -- pack (renumber) the messages in a folder
   2  *               -- into a contiguous range from 1 to n.
   3  *
   4  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   5  * COPYRIGHT file in the root directory of the nmh distribution for
   6  * complete copyright information.
   7  */
   8
   9 #include <h/mh.h>
  10
  11 /*
  12  * Pack the message in a folder.
  13  * Return -1 if error, else return 0.
  14  */
  15
  16 int
  17 folder_pack (struct msgs **mpp, int verbose)
  18 {
  19     int hole, msgnum, newcurrent = 0;
  20     char newmsg[BUFSIZ], oldmsg[BUFSIZ];
  21     struct msgs *mp;
  22
  23     mp = *mpp;
  24
  25     /*
  26      * Just return if folder is empty.
  27      */
  28     if (mp->nummsg == 0)
  29         return 0;
  30
  31     /*
  32      * Make sure we have message status space allocated
  33      * for all numbers from 1 to current high message.
  34      */
  35     if (mp->lowoff > 1) {
  36         if (!(mp = folder_realloc(mp, 1, mp->hghmsg))) {
  37             inform("unable to allocate folder storage");
  38             return -1;
  39         }
  40         *mpp = mp;
  41     }
  42
  43     for (msgnum = mp->lowmsg, hole = 1; msgnum <= mp->hghmsg; msgnum++) {
  44         if (does_exist (mp, msgnum)) {
  45             if (msgnum != hole) {
  46                 strncpy (newmsg, m_name (hole), sizeof(newmsg));
  47                 strncpy (oldmsg, m_name (msgnum), sizeof(oldmsg));
  48                 if (verbose)
  49                     printf ("message %s becomes %s\n", oldmsg, newmsg);
  50
  51                 /*
  52                  * Invoke the external refile hook for each message being renamed.
  53                  * This is done before the file is renamed so that the old message
  54                  * file is around for the hook.
  55                  */
  56
  57                 (void)snprintf(oldmsg, sizeof (oldmsg), "%s/%d", mp->foldpath, msgnum);
  58                 (void)snprintf(newmsg, sizeof (newmsg), "%s/%d", mp->foldpath, hole);
  59                 ext_hook("ref-hook", oldmsg, newmsg);
  60
  61                 /* move the message file */
  62                 if (rename (oldmsg, newmsg) == -1) {
  63                     advise (newmsg, "unable to rename %s to", oldmsg);
  64                     return -1;
  65                 }
  66
  67                 /* check if this is the current message */
  68                 if (msgnum == mp->curmsg)
  69                     newcurrent = hole;
  70
  71                 /* copy the attribute flags for this message */
  72                 copy_msg_flags (mp, hole, msgnum);
  73
  74                 if (msgnum == mp->lowsel)
  75                     mp->lowsel = hole;
  76                 if (msgnum == mp->hghsel)
  77                     mp->hghsel = hole;
  78
  79                 /* mark that sequence information has been modified */
  80                 mp->msgflags |= SEQMOD;
  81             }
  82             hole++;
  83         }
  84     }
  85
  86     /* record the new number for the high/low message */
  87     mp->lowmsg = 1;
  88     mp->hghmsg = hole - 1;
  89
  90     /* update the "cur" sequence */
  91     if (newcurrent != 0)
  92         seq_setcur (mp, newcurrent);
  93
  94     return 0;
  95 }