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)
33 name = getcpy(toabsdir(name));
34 if (!(dd = opendir(name))) {
39 if (stat(name, &st) == -1) {
45 /* Allocate the main structure for folder information */
46 mp = (struct msgs *) mh_xmalloc((size_t) sizeof(*mp));
48 clear_folder_flags(mp);
58 if (access(name, W_OK) == -1)
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) {
85 ** Check if this is it the highest or
88 if (msgnum < mp->lowmsg)
90 if (msgnum > mp->hghmsg)
95 ** Now increment count, and record message
96 ** number in a temporary place for now.
98 mi[mp->nummsg++] = msgnum;
101 switch (dp->d_name[0]) {
108 ** indicate that there are other
118 mp->lowoff = max(mp->lowmsg, 1);
120 /* Go ahead and allocate space for 100 additional messages. */
121 mp->hghoff = mp->hghmsg + 100;
123 /* for testing, allocate minimal necessary space */
124 /* mp->hghoff = max(mp->hghmsg, 1); */
126 /* Allocate space for status of each message. */
128 mp->msgstats = mh_xmalloc(MSGSTATSIZE(mp, mp->lowoff, mp->hghoff));
131 ** Clear all the flag bits for all the message
132 ** status entries we just allocated.
133 ** TODO: use memset() ?
135 for (msgnum = mp->lowoff; msgnum <= mp->hghoff; msgnum++)
136 clear_msg_flags(mp, msgnum);
139 ** Scan through the array of messages we've seen and
140 ** setup the initial flags for those messages in the
141 ** newly allocated mp->msgstats area.
143 for (msgnum = 0; msgnum < mp->nummsg; msgnum++)
144 set_exists(mp, mi[msgnum]);
146 free(mi); /* We don't need this anymore */
149 ** Read and initialize the sequence information.