2 * folder_read.c -- initialize folder structure and read folder
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.
12 /* We allocate the `mi' array 1024 elements at a time */
16 * 1) Create the folder/message structure
17 * 2) Read the directory (folder) and temporarily
18 * record the numbers of the messages we have seen.
19 * 3) Then allocate the array for message attributes and
20 * set the initial flags for all messages we've seen.
21 * 4) Read and initialize the sequence information.
25 folder_read (char *name)
27 int msgnum, prefix_len, len, *mi;
33 name = m_mailpath (name);
34 if (!(dd = opendir (name))) {
39 if (stat (name, &st) == -1) {
44 /* Allocate the main structure for folder information */
45 mp = (struct msgs *) mh_xmalloc ((size_t) sizeof(*mp));
47 clear_folder_flags (mp);
57 if (access (name, W_OK) == -1)
59 prefix_len = strlen(backup_prefix);
62 * Allocate a temporary place to record the
63 * name of the messages in this folder.
66 mi = (int *) mh_xmalloc ((size_t) (len * sizeof(*mi)));
68 while ((dp = readdir (dd))) {
69 if ((msgnum = m_atoi (dp->d_name)) && msgnum > 0) {
71 * Check if we need to allocate more
72 * temporary elements for message names.
74 if (mp->nummsg >= len) {
76 mi = (int *) mh_xrealloc (mi, (size_t) (len * sizeof(*mi)));
79 /* Check if this is the first message we've seen */
80 if (mp->nummsg == 0) {
84 /* Check if this is it the highest or lowest we've seen? */
85 if (msgnum < mp->lowmsg)
87 if (msgnum > mp->hghmsg)
92 * Now increment count, and record message
93 * number in a temporary place for now.
95 mi[mp->nummsg++] = msgnum;
98 switch (dp->d_name[0]) {
107 /* skip any files beginning with backup prefix */
108 if (!strncmp (dp->d_name, backup_prefix, prefix_len))
111 /* skip the altmsg link file */
112 if (!strcmp (dp->d_name, altmsglink))
115 /* indicate that there are other files in folder */
116 set_other_files (mp);
123 mp->lowoff = max (mp->lowmsg, 1);
125 /* Go ahead and allocate space for 100 additional messages. */
126 mp->hghoff = mp->hghmsg + 100;
128 /* for testing, allocate minimal necessary space */
129 /* mp->hghoff = max (mp->hghmsg, 1); */
132 * Allocate space for status of each message.
134 mp->msgstats = mh_xmalloc (MSGSTATSIZE(mp, mp->lowoff, mp->hghoff));
137 * Clear all the flag bits for all the message
138 * status entries we just allocated.
140 for (msgnum = mp->lowoff; msgnum <= mp->hghoff; msgnum++)
141 clear_msg_flags (mp, msgnum);
144 * Scan through the array of messages we've seen and
145 * setup the initial flags for those messages in the
146 * newly allocated mp->msgstats area.
148 for (msgnum = 0; msgnum < mp->nummsg; msgnum++)
149 set_exists (mp, mi[msgnum]);
151 free (mi); /* We don't need this anymore */
154 * Read and initialize the sequence information.