+++ /dev/null
-/*
- 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,
-};