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