Пример #1
0
        /// <summary>
        /// Sets the size (in bytes) of this file. Because
        /// <see cref="Write(long, MemoryStream)"/> to the file will grow
        /// it automatically if needed, this method is mainly usefull for truncating
        /// a file.
        /// </summary>
        /// <param name="length">the new length of the file in bytes</param>
        /// <exception cref="ReadOnlyException">ReadOnlyException if this file is read-only</exception>
        /// <exception cref="IOException">IOException on error updating the file size</exception>
        public void SetLength(long length)
        {
            CheckWritable();

            if (GetLength() == length)
            {
                return;
            }

            UpdateTimeStamps(true);
            chain.SetSize(length);

            entry.SetStartCluster(chain.GetStartCluster());
            entry.SetLength(length);
        }
Пример #2
0
        internal override void ChangeSize(int entryCount)
        {
            if (entryCount == 0)
            {
                throw new Exception();
            }

            var size = entryCount * FatDirectoryEntry.SIZE;

            if (size > MAX_SIZE)
            {
                throw new DirectoryFullException(
                          "directory would grow beyond " + MAX_SIZE + " bytes",
                          GetCapacity(), entryCount);
            }

            SizeChanged(Chain.SetSize(Math.Max(size, Chain.GetClusterSize())));
        }