IsEnded() public method

public IsEnded ( ) : bool
return bool
Ejemplo n.º 1
0
        /// <summary>
        /// Reads (and processes ... up to a point) chunks after last IDAT.
        /// </summary>
        ///
        private void ReadLastChunks()
        {
            CurrentChunkGroup = ChunksList.CHUNK_GROUP_5_AFTERIDAT;
            // PngHelper.logdebug("idat ended? " + iIdatCstream.isEnded());
            if (!iIdatCstream.IsEnded())
            {
                iIdatCstream.ForceChunkEnd();
            }

            var clen     = iIdatCstream.GetLenLastChunk();
            var chunkid  = iIdatCstream.GetIdLastChunk();
            var endfound = false;
            var first    = true;

            while (!endfound)
            {
                var skip = false;
                if (!first)
                {
                    clen    = PngHelperInternal.ReadInt4(inputStream);
                    offset += 4;
                    if (clen < 0)
                    {
                        throw new PngjInputException("bad len " + clen);
                    }

                    PngHelperInternal.ReadBytes(inputStream, chunkid, 0, 4);
                    offset += 4;
                }

                first = false;
                if (PngCsUtils.arraysEqual4(chunkid, ChunkHelper.b_IDAT))
                {
                    skip = true; // extra dummy (empty?) idat chunk, it can happen, ignore it
                }
                else if (PngCsUtils.arraysEqual4(chunkid, ChunkHelper.b_IEND))
                {
                    CurrentChunkGroup = ChunksList.CHUNK_GROUP_6_END;
                    endfound          = true;
                }
                ReadChunk(chunkid, clen, skip);
            }

            if (!endfound)
            {
                throw new PngjInputException("end chunk not found - offset=" + offset);
            }
            // PngHelper.logdebug("end chunk found ok offset=" + offset);
        }
Ejemplo n.º 2
0
        public void ReadLastChunks()
        {
            CurrentChunkGroup = 5;
            if (!iIdatCstream.IsEnded())
            {
                iIdatCstream.ForceChunkEnd();
            }
            int num = iIdatCstream.GetLenLastChunk();

            byte[] idLastChunk = iIdatCstream.GetIdLastChunk();
            bool   flag        = false;
            bool   flag2       = true;
            bool   flag3       = false;

            while (!flag)
            {
                flag3 = false;
                if (!flag2)
                {
                    num     = PngHelperInternal.ReadInt4(inputStream);
                    offset += 4L;
                    if (num < 0)
                    {
                        throw new PngjInputException("bad len " + num.ToString());
                    }
                    PngHelperInternal.ReadBytes(inputStream, idLastChunk, 0, 4);
                    offset += 4L;
                }
                flag2 = false;
                if (PngCsUtils.arraysEqual4(idLastChunk, ChunkHelper.b_IDAT))
                {
                    flag3 = true;
                }
                else if (PngCsUtils.arraysEqual4(idLastChunk, ChunkHelper.b_IEND))
                {
                    CurrentChunkGroup = 6;
                    flag = true;
                }
                ReadChunk(idLastChunk, num, flag3);
            }
            if (!flag)
            {
                throw new PngjInputException("end chunk not found - offset=" + offset.ToString());
            }
        }