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 "m_name.h"
  11 #include "seq_setcur.h"
  12 #include "ext_hook.h"
  13 #include "folder_realloc.h"
  14 #include "folder_pack.h"
  15 #include "error.h"
  16
  17 /*
  18  * Pack the message in a folder.
  19  * Return -1 if error, else return 0.
  20  */
  21
  22 int
  23 folder_pack (struct msgs **mpp, int verbose)
  24 {
  25     int hole, msgnum, newcurrent = 0;
  26     char newmsg[BUFSIZ], oldmsg[BUFSIZ];
  27     struct msgs *mp;
  28
  29     mp = *mpp;
  30
  31     /*
  32      * Just return if folder is empty.
  33      */
  34     if (mp->nummsg == 0)
  35         return 0;
  36
  37     /*
  38      * Make sure we have message status space allocated
  39      * for all numbers from 1 to current high message.
  40      */
  41     if (mp->lowoff > 1) {
  42         if (!(mp = folder_realloc(mp, 1, mp->hghmsg))) {
  43             inform("unable to allocate folder storage");
  44             return -1;
  45         }
  46         *mpp = mp;
  47     }
  48
  49     for (msgnum = mp->lowmsg, hole = 1; msgnum <= mp->hghmsg; msgnum++) {
  50         if (does_exist (mp, msgnum)) {
  51             if (msgnum != hole) {
  52                 strncpy (newmsg, m_name (hole), sizeof(newmsg));
  53                 strncpy (oldmsg, m_name (msgnum), sizeof(oldmsg));
  54                 if (verbose)
  55                     printf ("message %s becomes %s\n", oldmsg, newmsg);
  56
  57                 /*
  58                  * Invoke the external refile hook for each message being renamed.
  59                  * This is done before the file is renamed so that the old message
  60                  * file is around for the hook.
  61                  */
  62
  63                 (void)snprintf(oldmsg, sizeof (oldmsg), "%s/%d", mp->foldpath, msgnum);
  64                 (void)snprintf(newmsg, sizeof (newmsg), "%s/%d", mp->foldpath, hole);
  65                 ext_hook("ref-hook", oldmsg, newmsg);
  66
  67                 /* move the message file */
  68                 if (rename (oldmsg, newmsg) == -1) {
  69                     advise (newmsg, "unable to rename %s to", oldmsg);
  70                     return -1;
  71                 }
  72
  73                 /* check if this is the current message */
  74                 if (msgnum == mp->curmsg)
  75                     newcurrent = hole;
  76
  77                 /* copy the attribute flags for this message */
  78                 copy_msg_flags (mp, hole, msgnum);
  79
  80                 if (msgnum == mp->lowsel)
  81                     mp->lowsel = hole;
  82                 if (msgnum == mp->hghsel)
  83                     mp->hghsel = hole;
  84
  85                 /* mark that sequence information has been modified */
  86                 mp->msgflags |= SEQMOD;
  87             }
  88             hole++;
  89         }
  90     }
  91
  92     /* record the new number for the high/low message */
  93     mp->lowmsg = 1;
  94     mp->hghmsg = hole - 1;
  95
  96     /* update the "cur" sequence */
  97     if (newcurrent != 0)
  98         seq_setcur (mp, newcurrent);
  99
 100     return 0;
 101 }