mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-11-24 12:19:16 +01:00
30bc03c9fa
-updated libext2fs to e2fsprogs 1.42 -updated libfat to R4883 Thanks to USB Loader GX for the new libs
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/*
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* dirblock.c --- directory block routines.
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*
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* Copyright (C) 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <time.h>
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#include "ext2_fs.h"
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#include "ext2fs.h"
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errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
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void *buf, int flags EXT2FS_ATTR((unused)))
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{
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errcode_t retval;
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char *p, *end;
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struct ext2_dir_entry *dirent;
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unsigned int name_len, rec_len;
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retval = io_channel_read_blk64(fs->io, block, 1, buf);
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if (retval)
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return retval;
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p = (char *) buf;
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end = (char *) buf + fs->blocksize;
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while (p < end-8) {
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dirent = (struct ext2_dir_entry *) p;
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#ifdef WORDS_BIGENDIAN
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dirent->inode = ext2fs_swab32(dirent->inode);
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dirent->rec_len = ext2fs_swab16(dirent->rec_len);
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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#endif
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name_len = dirent->name_len;
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#ifdef WORDS_BIGENDIAN
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if (flags & EXT2_DIRBLOCK_V2_STRUCT)
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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#endif
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if ((retval = ext2fs_get_rec_len(fs, dirent, &rec_len)) != 0)
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return retval;
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if ((rec_len < 8) || (rec_len % 4)) {
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rec_len = 8;
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retval = EXT2_ET_DIR_CORRUPTED;
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} else if (((name_len & 0xFF) + 8) > rec_len)
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retval = EXT2_ET_DIR_CORRUPTED;
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p += rec_len;
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}
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return retval;
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}
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errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
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void *buf, int flags EXT2FS_ATTR((unused)))
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{
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return ext2fs_read_dir_block3(fs, block, buf, flags);
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}
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errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
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void *buf)
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{
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return ext2fs_read_dir_block3(fs, block, buf, 0);
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}
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errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
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void *inbuf, int flags EXT2FS_ATTR((unused)))
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{
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#ifdef WORDS_BIGENDIAN
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errcode_t retval;
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char *p, *end;
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char *buf = 0;
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unsigned int rec_len;
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struct ext2_dir_entry *dirent;
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retval = ext2fs_get_mem(fs->blocksize, &buf);
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if (retval)
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return retval;
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memcpy(buf, inbuf, fs->blocksize);
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p = buf;
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end = buf + fs->blocksize;
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while (p < end) {
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dirent = (struct ext2_dir_entry *) p;
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if ((retval = ext2fs_get_rec_len(fs, dirent, &rec_len)) != 0)
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return retval;
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if ((rec_len < 8) ||
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(rec_len % 4)) {
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ext2fs_free_mem(&buf);
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return (EXT2_ET_DIR_CORRUPTED);
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}
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p += rec_len;
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dirent->inode = ext2fs_swab32(dirent->inode);
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dirent->rec_len = ext2fs_swab16(dirent->rec_len);
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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if (flags & EXT2_DIRBLOCK_V2_STRUCT)
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dirent->name_len = ext2fs_swab16(dirent->name_len);
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}
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retval = io_channel_write_blk64(fs->io, block, 1, buf);
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ext2fs_free_mem(&buf);
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return retval;
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#else
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return io_channel_write_blk64(fs->io, block, 1, (char *) inbuf);
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#endif
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}
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errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
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void *inbuf, int flags EXT2FS_ATTR((unused)))
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{
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return ext2fs_write_dir_block3(fs, block, inbuf, flags);
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}
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errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
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void *inbuf)
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{
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return ext2fs_write_dir_block3(fs, block, inbuf, 0);
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}
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