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 "seq_setcur.h"
  11 #include "ext_hook.h"
  12 #include "folder_realloc.h"
  13 #include "folder_pack.h"
  14 #include "error.h"
  15
  16 /*
  17  * Pack the message in a folder.
  18  * Return -1 if error, else return 0.
  19  */
  20
  21 int
  22 folder_pack (struct msgs **mpp, int verbose)
  23 {
  24     int hole, msgnum, newcurrent = 0;
  25     char newmsg[BUFSIZ], oldmsg[BUFSIZ];
  26     struct msgs *mp;
  27
  28     mp = *mpp;
  29
  30     /*
  31      * Just return if folder is empty.
  32      */
  33     if (mp->nummsg == 0)
  34         return 0;
  35
  36     /*
  37      * Make sure we have message status space allocated
  38      * for all numbers from 1 to current high message.
  39      */
  40     if (mp->lowoff > 1) {
  41         if (!(mp = folder_realloc(mp, 1, mp->hghmsg))) {
  42             inform("unable to allocate folder storage");
  43             return -1;
  44         }
  45         *mpp = mp;
  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                 /*
  57                  * Invoke the external refile hook for each message being renamed.
  58                  * This is done before the file is renamed so that the old message
  59                  * file is around for the hook.
  60                  */
  61
  62                 (void)snprintf(oldmsg, sizeof (oldmsg), "%s/%d", mp->foldpath, msgnum);
  63                 (void)snprintf(newmsg, sizeof (newmsg), "%s/%d", mp->foldpath, hole);
  64                 ext_hook("ref-hook", oldmsg, newmsg);
  65
  66                 /* move the message file */
  67                 if (rename (oldmsg, newmsg) == -1) {
  68                     advise (newmsg, "unable to rename %s to", oldmsg);
  69                     return -1;
  70                 }
  71
  72                 /* check if this is the current message */
  73                 if (msgnum == mp->curmsg)
  74                     newcurrent = hole;
  75
  76                 /* copy the attribute flags for this message */
  77                 copy_msg_flags (mp, hole, msgnum);
  78
  79                 if (msgnum == mp->lowsel)
  80                     mp->lowsel = hole;
  81                 if (msgnum == mp->hghsel)
  82                     mp->hghsel = hole;
  83
  84                 /* mark that sequence information has been modified */
  85                 mp->msgflags |= SEQMOD;
  86             }
  87             hole++;
  88         }
  89     }
  90
  91     /* record the new number for the high/low message */
  92     mp->lowmsg = 1;
  93     mp->hghmsg = hole - 1;
  94
  95     /* update the "cur" sequence */
  96     if (newcurrent != 0)
  97         seq_setcur (mp, newcurrent);
  98
  99     return 0;
 100 }