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/cbm.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 exfat/mkfs/cbm.c (limited to 'exfat/mkfs/cbm.c') diff --git a/exfat/mkfs/cbm.c b/exfat/mkfs/cbm.c new file mode 100644 index 000000000..6d948b4cd --- /dev/null +++ b/exfat/mkfs/cbm.c @@ -0,0 +1,74 @@ +/* + cbm.c (09.11.10) + Clusters Bitmap 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 "cbm.h" +#include "fat.h" +#include "uct.h" +#include "rootdir.h" + +static off64_t cbm_alignment(void) +{ + return get_cluster_size(); +} + +static off64_t cbm_size(void) +{ + return DIV_ROUND_UP( + (get_volume_size() - get_position(&cbm)) / get_cluster_size(), + CHAR_BIT); +} + +static int cbm_write(struct exfat_dev* dev) +{ + uint32_t allocated_clusters = + DIV_ROUND_UP(cbm.get_size(), get_cluster_size()) + + DIV_ROUND_UP(uct.get_size(), get_cluster_size()) + + DIV_ROUND_UP(rootdir.get_size(), get_cluster_size()); + size_t bitmap_size = DIV_ROUND_UP(allocated_clusters, CHAR_BIT); + uint8_t* bitmap = malloc(bitmap_size); + size_t i; + + if (bitmap == NULL) + { + exfat_error("failed to allocate bitmap of %zu bytes", bitmap_size); + return 1; + } + + for (i = 0; i < bitmap_size * CHAR_BIT; i++) + if (i < allocated_clusters) + BMAP_SET(bitmap, i); + else + BMAP_CLR(bitmap, i); + if (exfat_write(dev, bitmap, bitmap_size) < 0) + { + exfat_error("failed to write bitmap of %zu bytes", bitmap_size); + return 1; + } + free(bitmap); + return 0; +} + +const struct fs_object cbm = +{ + .get_alignment = cbm_alignment, + .get_size = cbm_size, + .write = cbm_write, +}; -- cgit v1.2.3