print_help.c: Move interface to own file.

[nmh] / sbr / folder_realloc.c

diff --git a/sbr/folder_realloc.c b/sbr/folder_realloc.c
index f3130f144f9b03674c02e7fb62b690422dc52672..69461eda80419925e1b739b2127a26376fb110e1 100644 (file)
--- a/sbr/folder_realloc.c
+++ b/sbr/folder_realloc.c
@@ -1,11 +1,13 @@
-
-/*
- * folder_realloc.c -- realloc a folder/msgs structure
+/* folder_realloc.c -- realloc a folder/msgs structure
  *
- * $Id$
+ * This code is Copyright (c) 2002, by the authors of nmh.  See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
  */
 
-#include <h/mh.h>
+#include "h/mh.h"
+#include "error.h"
+#include "h/utils.h"
 
 /*
  * Reallocate some of the space in the folder
@@ -18,73 +20,42 @@
 struct msgs *
 folder_realloc (struct msgs *mp, int lo, int hi)
 {
+    struct bvector *tmpstats, *t;
+    size_t i;
     int msgnum;
 
     /* sanity checks */
     if (lo < 1)
-       adios (NULL, "BUG: called folder_realloc with lo (%d) < 1", lo);
+       die("BUG: called folder_realloc with lo (%d) < 1", lo);
     if (hi < 1)
-       adios (NULL, "BUG: called folder_realloc with hi (%d) < 1", hi);
+       die("BUG: called folder_realloc with hi (%d) < 1", hi);
     if (mp->nummsg > 0 && lo > mp->lowmsg)
-       adios (NULL, "BUG: called folder_realloc with lo (%d) > mp->lowmsg (%d)",
+       die("BUG: called folder_realloc with lo (%d) > mp->lowmsg (%d)",
               lo, mp->lowmsg);
     if (mp->nummsg > 0 && hi < mp->hghmsg)
-       adios (NULL, "BUG: called folder_realloc with hi (%d) < mp->hghmsg (%d)",
+       die("BUG: called folder_realloc with hi (%d) < mp->hghmsg (%d)",
               hi, mp->hghmsg);
 
     /* Check if we really need to reallocate anything */
     if (lo == mp->lowoff && hi == mp->hghoff)
        return mp;
 
-    if (lo == mp->lowoff) {
-       /*
-        * We are just extending (or shrinking) the end of message
-        * status array.  So we don't have to move anything and can
-        * just realloc the message status array.
-        */
-       if (!(mp->msgstats = realloc (mp->msgstats, MSGSTATSIZE(mp, lo, hi)))) {
-           advise (NULL, "unable to reallocate message storage");
-           return NULL;
-       }
-    } else {
-       /*
-        * We are changing the offset of the message status
-        * array.  So we will need to shift everything.
-        */
-       seqset_t *tmpstats;
-
-       /* first allocate the new message status space */
-       if (!(tmpstats = malloc (MSGSTATSIZE(mp, lo, hi)))) {
-           advise (NULL, "unable to reallocate message storage");
-           return NULL;
-       }
-
-       /* then copy messages status array with shift */
-       if (mp->nummsg > 0) {
-           for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++)
-               tmpstats[msgnum - lo] = mp->msgstats[msgnum - mp->lowoff];
-       }
-       free(mp->msgstats);
-       mp->msgstats = tmpstats;
+    /* first allocate the new message status space */
+    mp->num_msgstats = MSGSTATNUM (lo, hi);
+    tmpstats = mh_xmalloc (MSGSTATSIZE(mp));
+    for (i = 0, t = tmpstats; i < mp->num_msgstats; ++i, ++t) {
+        bvector_init(t);
     }
 
-    mp->lowoff = lo;
-    mp->hghoff = hi;
-
-    /*
-     * Clear all the flags for entries outside
-     * the current message range for this folder.
-     */
+    /* then copy messages status array with shift */
     if (mp->nummsg > 0) {
-       for (msgnum = mp->lowoff; msgnum < mp->lowmsg; msgnum++)
-           clear_msg_flags (mp, msgnum);
-       for (msgnum = mp->hghmsg + 1; msgnum <= mp->hghoff; msgnum++)
-           clear_msg_flags (mp, msgnum);
-    } else {
-       /* no messages, so clear entire range */
-       for (msgnum = mp->lowoff; msgnum <= mp->hghoff; msgnum++)
-           clear_msg_flags (mp, msgnum);
+        for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++)
+            bvector_copy (tmpstats + msgnum - lo, msgstat (mp, msgnum));
     }
+    free(mp->msgstats);
+    mp->msgstats = tmpstats;
+    mp->lowoff = lo;
+    mp->hghoff = hi;
 
     return mp;
 }