From 9c754053b07a724bdd98d039f34899d6a49115b7 Mon Sep 17 00:00:00 2001 From: bigbiff bigbiff Date: Wed, 9 Jan 2013 09:09:08 -0500 Subject: Add libtar to TWRP instead of using busybox tar Add proper mkdosfs tool Add fuse to TWRP Add experimental exfat-fuse to TWRP Convert all system() functions to use new Exec_Cmd function --- exfat/mkfs/rootdir.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 exfat/mkfs/rootdir.c (limited to 'exfat/mkfs/rootdir.c') diff --git a/exfat/mkfs/rootdir.c b/exfat/mkfs/rootdir.c new file mode 100644 index 000000000..ddc476f4c --- /dev/null +++ b/exfat/mkfs/rootdir.c @@ -0,0 +1,100 @@ +/* + rootdir.c (09.11.10) + Root directory creation code. + + 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 + the Free Software Foundation, either version 3 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, see . +*/ + +#include +#include "rootdir.h" +#include "uct.h" +#include "cbm.h" +#include "uctc.h" + +static off64_t rootdir_alignment(void) +{ + return get_cluster_size(); +} + +static off64_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 (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; + return 0; +} + +const struct fs_object rootdir = +{ + .get_alignment = rootdir_alignment, + .get_size = rootdir_size, + .write = rootdir_write, +}; -- cgit v1.2.3