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