Imported Upstream version 0.9.8
[sven/exfat-utils.git] / mkfs / rootdir.c
index 547ca3b3927ee60834961b83350e793722442c34..3a4bd40e49eda94e398787d657aca94471a18e9e 100644 (file)
@@ -2,7 +2,7 @@
        rootdir.c (09.11.10)
        Root directory creation code.
 
-       Copyright (C) 2009, 2010  Andrew Nayenko
+       Copyright (C) 2011, 2012  Andrew Nayenko
 
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <unistd.h>
-#include <errno.h>
-#include "mkexfat.h"
+#include <string.h>
+#include "rootdir.h"
+#include "uct.h"
+#include "cbm.h"
+#include "uctc.h"
 
-off_t rootdir_alignment(void)
+static off_t rootdir_alignment(void)
 {
-       return CLUSTER_SIZE(sb);
+       return get_cluster_size();
 }
 
-off_t rootdir_size(void)
+static off_t rootdir_size(void)
 {
-       return CLUSTER_SIZE(sb);
+       return get_cluster_size();
 }
 
-int rootdir_write(struct exfat_dev* dev, off_t base)
+static void init_label_entry(struct exfat_entry_label* label_entry)
 {
+       memset(label_entry, 0, sizeof(struct exfat_entry_label));
+       label_entry->type = EXFAT_ENTRY_LABEL ^ EXFAT_ENTRY_VALID;
+
+       if (utf16_length(get_volume_label()) == 0)
+               return;
+
+       memcpy(label_entry->name, get_volume_label(),
+                       EXFAT_ENAME_MAX * sizeof(le16_t));
+       label_entry->length = utf16_length(get_volume_label());
+       label_entry->type |= EXFAT_ENTRY_VALID;
+}
+
+static void init_bitmap_entry(struct exfat_entry_bitmap* bitmap_entry)
+{
+       memset(bitmap_entry, 0, sizeof(struct exfat_entry_bitmap));
+       bitmap_entry->type = EXFAT_ENTRY_BITMAP;
+       bitmap_entry->start_cluster = cpu_to_le32(EXFAT_FIRST_DATA_CLUSTER);
+       bitmap_entry->size = cpu_to_le64(cbm.get_size());
+}
+
+static void init_upcase_entry(struct exfat_entry_upcase* upcase_entry)
+{
+       size_t i;
+       uint32_t sum = 0;
+
+       for (i = 0; i < sizeof(upcase_table); i++)
+               sum = ((sum << 31) | (sum >> 1)) + upcase_table[i];
+
+       memset(upcase_entry, 0, sizeof(struct exfat_entry_upcase));
+       upcase_entry->type = EXFAT_ENTRY_UPCASE;
+       upcase_entry->checksum = cpu_to_le32(sum);
+       upcase_entry->start_cluster = cpu_to_le32(
+                       (get_position(&uct) - get_position(&cbm)) / get_cluster_size() +
+                       EXFAT_FIRST_DATA_CLUSTER);
+       upcase_entry->size = cpu_to_le64(sizeof(upcase_table));
+}
+
+static int rootdir_write(struct exfat_dev* dev)
+{
+       struct exfat_entry_label label_entry;
+       struct exfat_entry_bitmap bitmap_entry;
+       struct exfat_entry_upcase upcase_entry;
+
+       init_label_entry(&label_entry);
+       init_bitmap_entry(&bitmap_entry);
+       init_upcase_entry(&upcase_entry);
+
        if (exfat_write(dev, &label_entry, sizeof(struct exfat_entry)) < 0)
                return 1;
        if (exfat_write(dev, &bitmap_entry, sizeof(struct exfat_entry)) < 0)
                return 1;
        if (exfat_write(dev, &upcase_entry, sizeof(struct exfat_entry)) < 0)
                return 1;
-       sb.rootdir_cluster = cpu_to_le32(OFFSET_TO_CLUSTER(base));
        return 0;
 }
+
+const struct fs_object rootdir =
+{
+       .get_alignment = rootdir_alignment,
+       .get_size = rootdir_size,
+       .write = rootdir_write,
+};