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

   1
   2 /*
   3  * folder_pack.c -- pack (renumber) the messages in a folder
   4  *               -- into a contiguous range from 1 to n.
   5  *
   6  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   7  * COPYRIGHT file in the root directory of the nmh distribution for
   8  * complete copyright information.
   9  */
  10
  11 #include <h/mh.h>
  12
  13 /*
  14  * Pack the message in a folder.
  15  * Return -1 if error, else return 0.
  16  */
  17
  18 int
  19 folder_pack (struct msgs **mpp, int verbose)
  20 {
  21     int hole, msgnum, newcurrent = 0;
  22     char newmsg[BUFSIZ], oldmsg[BUFSIZ];
  23     struct msgs *mp;
  24
  25     mp = *mpp;
  26
  27     /*
  28      * Just return if folder is empty.
  29      */
  30     if (mp->nummsg == 0)
  31         return 0;
  32
  33     /*
  34      * Make sure we have message status space allocated
  35      * for all numbers from 1 to current high message.
  36      */
  37     if (mp->lowoff > 1) {
  38         if ((mp = folder_realloc (mp, 1, mp->hghmsg)))
  39             *mpp = mp;
  40         else {
  41             advise (NULL, "unable to allocate folder storage");
  42             return -1;
  43         }
  44     }
  45
  46     for (msgnum = mp->lowmsg, hole = 1; msgnum <= mp->hghmsg; msgnum++) {
  47         if (does_exist (mp, msgnum)) {
  48             if (msgnum != hole) {
  49                 strncpy (newmsg, m_name (hole), sizeof(newmsg));
  50                 strncpy (oldmsg, m_name (msgnum), sizeof(oldmsg));
  51                 if (verbose)
  52                     printf ("message %s becomes %s\n", oldmsg, newmsg);
  53
  54                 /*
  55                  * Invoke the external refile hook for each message being renamed.
  56                  * This is done before the file is renamed so that the old message
  57                  * file is around for the hook.
  58                  */
  59
  60                 (void)snprintf(oldmsg, sizeof (oldmsg), "%s/%d", mp->foldpath, msgnum);
  61                 (void)snprintf(newmsg, sizeof (newmsg), "%s/%d", mp->foldpath, hole);
  62                 ext_hook("ref-hook", oldmsg, newmsg);
  63
  64                 /* move the message file */
  65                 if (rename (oldmsg, newmsg) == -1) {
  66                     advise (newmsg, "unable to rename %s to", oldmsg);
  67                     return -1;
  68                 }
  69
  70                 /* check if this is the current message */
  71                 if (msgnum == mp->curmsg)
  72                     newcurrent = hole;
  73
  74                 /* copy the attribute flags for this message */
  75                 copy_msg_flags (mp, hole, msgnum);
  76
  77                 if (msgnum == mp->lowsel)
  78                     mp->lowsel = hole;
  79                 if (msgnum == mp->hghsel)
  80                     mp->hghsel = hole;
  81
  82                 /* mark that sequence information has been modified */
  83                 mp->msgflags |= SEQMOD;
  84             }
  85             hole++;
  86         }
  87     }
  88
  89     /* record the new number for the high/low message */
  90     mp->lowmsg = 1;
  91     mp->hghmsg = hole - 1;
  92
  93     /* update the "cur" sequence */
  94     if (newcurrent != 0)
  95         seq_setcur (mp, newcurrent);
  96
  97     return 0;
  98 }