public int ReadFrom(byte[] buffer, int offset)
        {
            offset  += ReadHeader(buffer, offset);
            BestFree = new BlockDirectoryDataFree[3];
            for (int i = 0; i < BestFree.Length; i++)
            {
                var free = new BlockDirectoryDataFree();
                offset     += free.ReadFrom(buffer, offset);
                BestFree[i] = free;
            }
            offset += HeaderPadding;

            var entries = new List <BlockDirectoryData>();
            var eof     = buffer.Length;

            while (offset < eof)
            {
                BlockDirectoryData entry;
                if (buffer[offset] == 0xff && buffer[offset + 0x1] == 0xff)
                {
                    //unused
                    entry = new BlockDirectoryDataUnused();
                }
                else
                {
                    entry = new BlockDirectoryDataEntry(_context);
                }
                offset += entry.ReadFrom(buffer, offset);
                entries.Add(entry);
            }
            Entries = entries.ToArray();
            return(buffer.Length - offset);
        }
示例#2
0
        public int ReadFrom(byte[] buffer, int offset)
        {
            Magic    = Utilities.ToUInt32BigEndian(buffer, offset);
            BestFree = new BlockDirectoryDataFree[3];
            offset  += 0x4;
            for (int i = 0; i < BestFree.Length; i++)
            {
                var free = new BlockDirectoryDataFree();
                offset     += free.ReadFrom(buffer, offset);
                BestFree[i] = free;
            }

            var entries = new List <BlockDirectoryData>();
            var eof     = buffer.Length;

            while (offset < eof)
            {
                BlockDirectoryData entry;
                if (buffer[offset] == 0xff && buffer[offset + 0x1] == 0xff)
                {
                    //unused
                    entry = new BlockDirectoryDataUnused();
                }
                else
                {
                    entry = new BlockDirectoryDataEntry();
                }
                offset += entry.ReadFrom(buffer, offset);
                entries.Add(entry);
            }
            Entries = entries.ToArray();
            return(buffer.Length - offset);
        }
示例#3
0
        public int ReadFrom(byte[] buffer, int offset)
        {
            if (sb_ok == false)
            {
                throw new IOException("not initial SuperBlock");
            }

            Magic    = EndianUtilities.ToUInt32BigEndian(buffer, offset);
            BestFree = new BlockDirectoryDataFree[3];
            if (Magic == BlockDirectory.HeaderMagicV5)
            {
                offset += 48;//xfs_dir3_blk_hdr
            }
            else
            {
                offset += 0x4;
            }

            for (int i = 0; i < BestFree.Length; i++)
            {
                var free = new BlockDirectoryDataFree();
                offset     += free.ReadFrom(buffer, offset);
                BestFree[i] = free;
            }

            if (Magic == BlockDirectory.HeaderMagicV5)
            {
                offset += 4;//__be32 xfs_dir3_data_hdr.pad
            }

            LeafStale = EndianUtilities.ToUInt32BigEndian(buffer, buffer.Length - 0x4);
            LeafCount = EndianUtilities.ToUInt32BigEndian(buffer, buffer.Length - 0x8);
            var entries = new List <BlockDirectoryData>();
            var eof     = buffer.Length - 0x8 - LeafCount * 0x8;

            while (offset < eof)
            {
                BlockDirectoryData entry;
                if (buffer[offset] == 0xff && buffer[offset + 0x1] == 0xff)
                {
                    //unused
                    entry = new BlockDirectoryDataUnused(SuperBlock);
                }
                else
                {
                    entry = new BlockDirectoryDataEntry(SuperBlock);
                }

                offset += entry.ReadFrom(buffer, offset);
                entries.Add(entry);
            }
            Entries = entries.ToArray();
            return(buffer.Length - offset);
        }
示例#4
0
        public int ReadFrom(byte[] buffer, int offset)
        {
            Magic    = EndianUtilities.ToUInt32BigEndian(buffer, offset);
            BestFree = new BlockDirectoryDataFree[3];

            if (Magic == HeaderMagicV5)
            {
                offset += 48;//xfs_dir3_blk_hdr
            }
            else
            {
                offset += 0x4;
            }

            for (int i = 0; i < BestFree.Length; i++)
            {
                var free = new BlockDirectoryDataFree();
                offset     += free.ReadFrom(buffer, offset);
                BestFree[i] = free;
            }

            if (Magic == HeaderMagicV5)
            {
                offset += 4;//__be32 xfs_dir3_data_hdr.pad
            }

            var entries = new List <BlockDirectoryData>();
            var eof     = buffer.Length;

            while (offset < eof)
            {
                BlockDirectoryData entry;
                if (buffer[offset] == 0xff && buffer[offset + 0x1] == 0xff)
                {
                    //unused
                    entry = new BlockDirectoryDataUnused(superblock);
                }
                else
                {
                    entry = new BlockDirectoryDataEntry(superblock);
                }
                offset += entry.ReadFrom(buffer, offset);
                entries.Add(entry);
            }
            Entries = entries.ToArray();
            return(buffer.Length - offset);
        }