C# RecordInputStream.Available方法代码示例

        public OldFormulaRecord(RecordInputStream ris) :
            base(ris, ris.Sid == biff2_sid)
        {
            ;

            if (IsBiff2)
            {
                field_4_value = ris.ReadDouble();
            }
            else
            {
                long valueLongBits = ris.ReadLong();
                specialCachedValue = SpecialCachedValue.Create(valueLongBits);
                if (specialCachedValue == null)
                {
                    field_4_value = BitConverter.Int64BitsToDouble(valueLongBits);
                }
            }

            if (IsBiff2)
            {
                field_5_options = (short)ris.ReadUByte();
            }
            else
            {
                field_5_options = ris.ReadShort();
            }

            int expression_len = ris.ReadShort();
            int nBytesAvailable = ris.Available();
            field_6_Parsed_expr = Formula.Read(expression_len, ris, nBytesAvailable);
        }

 /**
  * @param in the RecordInputstream to Read the record from
  */
 public SharedFormulaRecord(RecordInputStream in1)
     : base(in1)
 {
     field_5_reserved        = in1.ReadShort();
     int field_6_expression_len = in1.ReadShort();
     int nAvailableBytes = in1.Available();
     field_7_parsed_expr = NPOI.SS.Formula.Formula.Read(field_6_expression_len, in1, nAvailableBytes);
 }

 public ArrayRecord(RecordInputStream in1)
     : base(in1)
 {
     _options = in1.ReadUShort();
     _field3notUsed = in1.ReadInt();
     int formulaTokenLen = in1.ReadUShort();
     int totalFormulaLen = in1.Available();
     _formula = NPOI.SS.Formula.Formula.Read(formulaTokenLen, in1, totalFormulaLen);
 }

        /**
         * Constructs a EOFRecord record and Sets its fields appropriately.
         * @param in the RecordInputstream to Read the record from
         */

        public ExtSSTRecord(RecordInputStream in1)
        {
            field_1_strings_per_bucket = in1.ReadShort();

            int nInfos = in1.Remaining / InfoSubRecord.ENCODED_SIZE;
            List<InfoSubRecord> lst = new List<InfoSubRecord>(nInfos);

            while (in1.Available() > 0)
            {
                InfoSubRecord info = new InfoSubRecord(in1);
                lst.Add(info);

                if (in1.Available() == 0 && in1.HasNextRecord && in1.GetNextSid() == ContinueRecord.sid)
                {
                    in1.NextRecord();
                }
            }
            _sstInfos = lst.ToArray();
        }

 public ChartEndBlockRecord(RecordInputStream in1)
 {
     rt = in1.ReadShort();
     grbitFrt = in1.ReadShort();
     iObjectKind = in1.ReadShort();
             // Often, but not always has 6 unused bytes at the end
     if(in1.Available() == 0) {
         unused = new byte[0];
     } else {
         unused = new byte[6];
         in1.ReadFully(unused);
     }
 }

 public CatLabRecord(RecordInputStream in1)
 {
     rt = in1.ReadShort();
     grbitFrt = in1.ReadShort();
     wOffset = in1.ReadShort();
     at = in1.ReadShort();
     grbit = in1.ReadShort();
     // Often, but not always has an unused short at the end
     if (in1.Available() == 0)
     {
         unused = null;
     }
     else
     {
         unused = in1.ReadShort();
     }
 }

 /**
  * This Is the starting point where strings are constructed.  Note that
  * strings may span across multiple continuations. Read the SST record
  * carefully before beginning to hack.
  */
 public void ManufactureStrings(int stringCount, RecordInputStream in1)
 {
     for (int i = 0; i < stringCount; i++)
     {
         // Extract exactly the count of strings from the SST record.
         UnicodeString str;
         if (in1.Available() == 0 && !in1.HasNextRecord)
         {
             System.Console.WriteLine("Ran out of data before creating all the strings! String at index " + i + "");
             str = new UnicodeString("");
         }
         else
         {
             str = new UnicodeString(in1);
         }
         AddToStringTable(strings, str);
     }
 }

        public ChartEndObjectRecord(RecordInputStream in1)
        {
            rt = in1.ReadShort();
            grbitFrt = in1.ReadShort();
            iObjectKind = in1.ReadShort();

            // The spec says that there should be 6 bytes at the
            //  end, which must be there and must be zero
            // However, sometimes Excel forgets them...
            reserved = new byte[6];
            if (in1.Available() == 0)
            {
                // They've gone missing...
            }
            else
            {
                // Read the reserved bytes 
                in1.ReadFully(reserved);
            }
        }

        /**
         * Constructs a Formula record and Sets its fields appropriately.
         * Note - id must be 0x06 (NOT 0x406 see MSKB #Q184647 for an 
         * "explanation of this bug in the documentation) or an exception
         *  will be throw upon validation
         *
         * @param in the RecordInputstream to Read the record from
         */

        public FormulaRecord(RecordInputStream in1):base(in1)
        {
		        long valueLongBits  = in1.ReadLong();
		        field_5_options = in1.ReadShort();
		        specialCachedValue = SpecialCachedValue.Create(valueLongBits);
		        if (specialCachedValue == null) {
			        field_4_value = BitConverter.Int64BitsToDouble(valueLongBits);
		        }

                field_6_zero = in1.ReadInt();
                int field_7_expression_len = in1.ReadShort();

                field_8_parsed_expr = NPOI.SS.Formula.Formula.Read(field_7_expression_len, in1,in1.Available());
        }

        public ExternalNameRecord(RecordInputStream in1)
        {
            field_1_option_flag = in1.ReadShort();
            field_2_ixals = in1.ReadShort();
            field_3_not_used = in1.ReadShort();
            int numChars = in1.ReadUByte();
            field_4_name = StringUtil.ReadUnicodeString(in1, numChars);

            // the record body can take different forms.
            // The form is dictated by the values of 3-th and 4-th bits in field_1_option_flag
            if (!IsOLELink && !IsStdDocumentNameIdentifier)
            {
                // another switch: the fWantAdvise bit specifies whether the body describes
                // an external defined name or a DDE data item
                if (IsAutomaticLink)
                {
                    if (in1.Available() > 0)
                    {
                        //body specifies DDE data item
                        int nColumns = in1.ReadUByte() + 1;
                        int nRows = in1.ReadShort() + 1;

                        int totalCount = nRows * nColumns;
                        _ddeValues = ConstantValueParser.Parse(in1, totalCount);
                        _nColumns = nColumns;
                        _nRows = nRows;
                    }
                }
                else
                {
                    //body specifies an external defined name
                    int formulaLen = in1.ReadUShort();
                    field_5_name_definition = Formula.Read(formulaLen, in1);
                }
            }
            //int nameLength = in1.ReadUByte();
            //int multibyteFlag = in1.ReadUByte();
            //if (multibyteFlag == 0)
            //{
            //    field_4_name = in1.ReadCompressedUnicode(nameLength);
            //}
            //else
            //{
            //    field_4_name = in1.ReadUnicodeLEString(nameLength);
            //}
            //if (!HasFormula)
            //{
            //    if (!IsStdDocumentNameIdentifier && !IsOLELink && IsAutomaticLink)
            //    {
            //        // both need to be incremented
            //        int nColumns = in1.ReadUByte() + 1;
            //        int nRows = in1.ReadShort() + 1;

            //        int totalCount = nRows * nColumns;
            //        _ddeValues = ConstantValueParser.Parse(in1, totalCount);
            //        _nColumns = nColumns;
            //        _nRows = nRows;
            //    }

            //    if (in1.Remaining > 0)
            //    {
            //        throw ReadFail("Some Unread data (is formula present?)");
            //    }
            //    field_5_name_definition = null;
            //    return;
            //}
            //int nBytesRemaining = in1.Available();
            //if (in1.Remaining <= 0)
            //{
            //    throw ReadFail("Ran out of record data trying to read formula.");
            //}
            //short formulaLen = in1.ReadShort();
            //nBytesRemaining -= 2;
            //field_5_name_definition = NPOI.SS.Formula.Formula.Read(formulaLen, in1, nBytesRemaining);
        }

        public ExternalNameRecord(RecordInputStream in1)
        {
            field_1_option_flag = in1.ReadShort();
            field_2_index = in1.ReadShort();
            field_3_not_used = in1.ReadShort();
            int nameLength = in1.ReadUByte();
            int multibyteFlag = in1.ReadUByte();
            if (multibyteFlag == 0)
            {
                field_4_name = in1.ReadCompressedUnicode(nameLength);
            }
            else
            {
                field_4_name = in1.ReadUnicodeLEString(nameLength);
            }            
            if (!HasFormula)
            {
                if (!IsStdDocumentNameIdentifier && !IsOLELink && IsAutomaticLink)
                {
                    // both need to be incremented
                    int nColumns = in1.ReadUByte() + 1;
                    int nRows = in1.ReadShort() + 1;

                    int totalCount = nRows * nColumns;
                    _ddeValues = ConstantValueParser.Parse(in1, totalCount);
                    _nColumns = nColumns;
                    _nRows = nRows;
                }

                if (in1.Remaining > 0)
                {
                    throw ReadFail("Some Unread data (is formula present?)");
                }
                field_5_name_definition = null;
                return;
            }
            int nBytesRemaining = in1.Available();
            if (in1.Remaining <= 0)
            {
                throw ReadFail("Ran out of record data trying to read formula.");
            }
            short formulaLen = in1.ReadShort();
            nBytesRemaining -= 2;
            field_5_name_definition = NPOI.SS.Formula.Formula.Read(formulaLen, in1, nBytesRemaining);
        }

        /**
         * Constructs a Name record and Sets its fields appropriately.
         *
         * @param in the RecordInputstream to Read the record from
         */
        public NameRecord(RecordInputStream in1)
        {
            field_1_option_flag                 = in1.ReadShort();
		    field_2_keyboard_shortcut           = (byte)in1.ReadByte();
		    int field_3_length_name_text        = in1.ReadByte();
		    int field_4_length_name_definition  = in1.ReadShort();
		    field_5_externSheetIndex_plus1      = in1.ReadShort();
		    field_6_sheetNumber                 = in1.ReadUShort();
		    int field_7_length_custom_menu      = in1.ReadUByte();
		    int field_8_length_description_text = in1.ReadUByte();
		    int field_9_length_help_topic_text  = in1.ReadUByte();
		    int field_10_length_status_bar_text = in1.ReadUByte();

		    //store the name in byte form if it's a built-in name
		    field_11_nameIsMultibyte = (in1.ReadByte() != 0);
		    if (IsBuiltInName) {
			    field_12_built_in_code = (byte)in1.ReadByte();
		    } else {
			    if (field_11_nameIsMultibyte) {
				    field_12_name_text = in1.ReadUnicodeLEString(field_3_length_name_text);
			    } else {
				    field_12_name_text = in1.ReadCompressedUnicode(field_3_length_name_text);
			    }
		    }
          int nBytesAvailable = in1.Available() - (field_7_length_custom_menu
				+ field_8_length_description_text + field_9_length_help_topic_text + field_10_length_status_bar_text);
		    field_13_name_definition = SSFormula.Formula.Read(field_4_length_name_definition, in1, nBytesAvailable);

		    //Who says that this can only ever be compressed unicode???
		    field_14_custom_menu_text = in1.ReadCompressedUnicode(field_7_length_custom_menu);
		    field_15_description_text = in1.ReadCompressedUnicode(field_8_length_description_text);
		    field_16_help_topic_text  = in1.ReadCompressedUnicode(field_9_length_help_topic_text);
		    field_17_status_bar_text  = in1.ReadCompressedUnicode(field_10_length_status_bar_text);

        }

        /**
         * Constructs a <c>NoteRecord</c> and Fills its fields
         * from the supplied <c>RecordInputStream</c>.
         *
         * @param in the stream to Read from
         */
        public NoteRecord(RecordInputStream in1)
        {
            field_1_row = in1.ReadShort();
            field_2_col = in1.ReadUShort();
            field_3_flags = in1.ReadShort();
            field_4_shapeid = in1.ReadUShort();
            int length = in1.ReadShort();
		    field_5_hasMultibyte = in1.ReadByte() != 0x00;
		    if (field_5_hasMultibyte) {
			    field_6_author = StringUtil.ReadUnicodeLE(in1, length);
		    } else {
			    field_6_author = StringUtil.ReadCompressedUnicode(in1, length);
		    }
 		    if (in1.Available() == 1) {
			    field_7_padding = (byte)in1.ReadByte();
		    }
        }