/*
- * folder_realloc.c -- realloc a folder/msgs structure
- *
- * 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.
- */
+** folder_realloc.c -- realloc a folder/msgs structure
+**
+** 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 <sysexits.h>
#include <h/mh.h>
#include <h/utils.h>
/*
- * Reallocate some of the space in the folder
- * structure (currently just message status array).
- *
- * Return pointer to new folder structure.
- * If error, return NULL.
- */
+** Reallocate some of the space in the folder
+** structure (currently just message status array).
+**
+** Return pointer to new folder structure.
+** If error, return NULL.
+*/
struct msgs *
-folder_realloc (struct msgs *mp, int lo, int hi)
+folder_realloc(struct msgs *mp, int lo, int hi)
{
int msgnum;
/* sanity checks */
if (lo < 1)
- adios (NULL, "BUG: called folder_realloc with lo (%d) < 1", lo);
+ adios(EX_SOFTWARE, NULL, "BUG: called folder_realloc with lo (%d) < 1", lo);
if (hi < 1)
- adios (NULL, "BUG: called folder_realloc with hi (%d) < 1", hi);
+ adios(EX_SOFTWARE, NULL, "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)",
- lo, mp->lowmsg);
+ adios(EX_SOFTWARE, NULL, "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)",
- hi, mp->hghmsg);
+ adios(EX_SOFTWARE, NULL, "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)
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.
- */
- mp->msgstats = mh_xrealloc (mp->msgstats, MSGSTATSIZE(mp, lo, hi));
+ ** 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.
+ */
+ mp->msgstats = mh_xrealloc(mp->msgstats, MSGSTATSIZE(mp, lo, hi));
+ /*
+ ** Clear the newly allocated msg flag space. The lowoff and
+ ** hghoff are the old messagenumber range. So the calculation
+ ** of the first new element has to subtract lowoff.
+ */
+ memset(mp->msgstats + mp->hghoff - lo + 1, 0, hi - mp->hghoff);
} else {
/*
- * We are changing the offset of the message status
- * array. So we will need to shift everything.
- */
+ ** 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 */
- tmpstats = mh_xmalloc (MSGSTATSIZE(mp, lo, hi));
+ tmpstats = mh_xcalloc(MSGSTATSIZE(mp, lo, hi), 1);
/* then copy messages status array with shift */
if (mp->nummsg > 0) {
- for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++)
+ for (msgnum=mp->lowmsg; msgnum<=mp->hghmsg; msgnum++) {
tmpstats[msgnum - lo] = mp->msgstats[msgnum - mp->lowoff];
+ }
}
- free(mp->msgstats);
+ mh_free0(&(mp->msgstats));
mp->msgstats = tmpstats;
}
mp->lowoff = lo;
mp->hghoff = hi;
- /*
- * Clear all the flags for entries outside
- * the current message range for this folder.
- */
- 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);
- }
-
return mp;
}