X-Git-Url: https://git.sven.stormbind.net/?p=sven%2Ffuse-exfat.git;a=blobdiff_plain;f=mkfs%2Frootdir.c;fp=mkfs%2Frootdir.c;h=4f9b0e8a7e08612f2c3c767f97c69efaabf87502;hp=0000000000000000000000000000000000000000;hb=b747352475991e7b96183fa1014937efd3e47187;hpb=5151112c14bb7cdc93bcc66901485d94f2ab0c24

diff --git a/mkfs/rootdir.c b/mkfs/rootdir.c
new file mode 100644
index 0000000..4f9b0e8
--- /dev/null
+++ b/mkfs/rootdir.c
@@ -0,0 +1,102 @@
+/*
+	rootdir.c (09.11.10)
+	Root directory creation code.
+
+	Free exFAT implementation.
+	Copyright (C) 2011-2018  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
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License along
+	with this program; if not, write to the Free Software Foundation, Inc.,
+	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "rootdir.h"
+#include "uct.h"
+#include "cbm.h"
+#include "uctc.h"
+#include <string.h>
+
+static off_t rootdir_alignment(void)
+{
+	return get_cluster_size();
+}
+
+static off_t rootdir_size(void)
+{
+	return get_cluster_size();
+}
+
+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 (exfat_utf16_length(get_volume_label()) == 0)
+		return;
+
+	memcpy(label_entry->name, get_volume_label(),
+			EXFAT_ENAME_MAX * sizeof(le16_t));
+	label_entry->length = exfat_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;
+	return 0;
+}
+
+const struct fs_object rootdir =
+{
+	.get_alignment = rootdir_alignment,
+	.get_size = rootdir_size,
+	.write = rootdir_write,
+};