+++ /dev/null
-/*
- mkexfat.c (22.04.12)
- FS creation engine.
-
- 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 "mkexfat.h"
-#include <sys/types.h>
-#include <unistd.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <string.h>
-
-static int check_size(off_t volume_size)
-{
- const struct fs_object** pp;
- off_t position = 0;
-
- for (pp = objects; *pp; pp++)
- {
- position = ROUND_UP(position, (*pp)->get_alignment());
- position += (*pp)->get_size();
- }
-
- if (position > volume_size)
- {
- struct exfat_human_bytes vhb;
-
- exfat_humanize_bytes(volume_size, &vhb);
- exfat_error("too small device (%"PRIu64" %s)", vhb.value, vhb.unit);
- return 1;
- }
-
- return 0;
-
-}
-
-static int erase_object(struct exfat_dev* dev, const void* block,
- off_t block_size, off_t start, off_t size)
-{
- const off_t block_count = DIV_ROUND_UP(size, block_size);
- off_t i;
-
- if (exfat_seek(dev, start, SEEK_SET) == (off_t) -1)
- {
- exfat_error("seek to 0x%"PRIx64" failed", start);
- return 1;
- }
- for (i = 0; i < size; i += block_size)
- {
- if (exfat_write(dev, block, MIN(size - i, block_size)) < 0)
- {
- exfat_error("failed to erase block %"PRIu64"/%"PRIu64
- " at 0x%"PRIx64, i + 1, block_count, start);
- return 1;
- }
- }
- return 0;
-}
-
-static int erase(struct exfat_dev* dev)
-{
- const struct fs_object** pp;
- off_t position = 0;
- const off_t block_size = 1024 * 1024;
- void* block = malloc(block_size);
-
- if (block == NULL)
- {
- exfat_error("failed to allocate erase block");
- return 1;
- }
- memset(block, 0, block_size);
-
- for (pp = objects; *pp; pp++)
- {
- position = ROUND_UP(position, (*pp)->get_alignment());
- if (erase_object(dev, block, block_size, position,
- (*pp)->get_size()) != 0)
- {
- free(block);
- return 1;
- }
- position += (*pp)->get_size();
- }
-
- free(block);
- return 0;
-}
-
-static int create(struct exfat_dev* dev)
-{
- const struct fs_object** pp;
- off_t position = 0;
-
- for (pp = objects; *pp; pp++)
- {
- position = ROUND_UP(position, (*pp)->get_alignment());
- if (exfat_seek(dev, position, SEEK_SET) == (off_t) -1)
- {
- exfat_error("seek to 0x%"PRIx64" failed", position);
- return 1;
- }
- if ((*pp)->write(dev) != 0)
- return 1;
- position += (*pp)->get_size();
- }
- return 0;
-}
-
-int mkfs(struct exfat_dev* dev, off_t volume_size)
-{
- if (check_size(volume_size) != 0)
- return 1;
-
- fputs("Creating... ", stdout);
- fflush(stdout);
- if (erase(dev) != 0)
- return 1;
- if (create(dev) != 0)
- return 1;
- puts("done.");
-
- fputs("Flushing... ", stdout);
- fflush(stdout);
- if (exfat_fsync(dev) != 0)
- return 1;
- puts("done.");
-
- return 0;
-}
-
-off_t get_position(const struct fs_object* object)
-{
- const struct fs_object** pp;
- off_t position = 0;
-
- for (pp = objects; *pp; pp++)
- {
- position = ROUND_UP(position, (*pp)->get_alignment());
- if (*pp == object)
- return position;
- position += (*pp)->get_size();
- }
- exfat_bug("unknown object");
-}