/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) Under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for Additional information regarding copyright ownership.
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The ASF licenses this file to You Under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed Under the License is distributed on an "AS Is" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations Under the License.
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==================================================================== */
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namespace HH.WMS.Utils.NPOI.SS.Formula.PTG
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{
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using System;
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using System.Text;
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using HH.WMS.Utils.NPOI.Util;
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using HH.WMS.Utils.NPOI.HSSF.Record;
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/**
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* String Stores a String value in a formula value stored in the format
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* <Length 2 bytes>char[]
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*
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* @author Werner Froidevaux
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* @author Jason Height (jheight at chariot dot net dot au)
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* @author Bernard Chesnoy
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*/
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public class StringPtg : ScalarConstantPtg
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{
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public const byte sid = 0x17;
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private static BitField fHighByte = BitFieldFactory.GetInstance(0x01);
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/** the Char (")used in formulas to delimit string literals */
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private static char FORMULA_DELIMITER = '"';
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/**
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* NOTE: OO doc says 16bit Length, but BiffViewer says 8 Book says something
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* totally different, so don't look there!
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*/
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private int field_1_Length;
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private byte field_2_options;
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private bool _is16bitUnicode;
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private String field_3_string;
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/** Create a StringPtg from a stream */
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public StringPtg(ILittleEndianInput in1)
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{
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int field_1_length = in1.ReadUByte();
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field_2_options = (byte)in1.ReadByte();
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_is16bitUnicode = (field_2_options & 0x01) != 0;
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if (_is16bitUnicode)
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{
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field_3_string = StringUtil.ReadUnicodeLE(in1, field_1_length);
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}
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else
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{
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field_3_string = StringUtil.ReadCompressedUnicode(in1, field_1_length);
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}
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}
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/**
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* Create a StringPtg from a string representation of the number Number
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* format Is not Checked, it Is expected to be Validated in the Parser that
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* calls this method.
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*
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* @param value :
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* String representation of a floating point number
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*/
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public StringPtg(String value)
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{
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if (value.Length > 255)
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{
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throw new ArgumentException(
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"String literals in formulas can't be bigger than 255 Chars ASCII");
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}
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_is16bitUnicode = StringUtil.HasMultibyte(value);
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field_3_string = value;
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field_1_Length = value.Length; // for the moment, we support only ASCII strings in formulas we Create
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}
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public String Value
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{
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get { return field_3_string; }
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}
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public override void Write(ILittleEndianOutput out1)
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{
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out1.WriteByte(sid + PtgClass);
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out1.WriteByte(field_3_string.Length); // Note - nChars is 8-bit
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out1.WriteByte(_is16bitUnicode ? 0x01 : 0x00);
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if (_is16bitUnicode)
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{
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StringUtil.PutUnicodeLE(field_3_string, out1);
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}
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else
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{
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StringUtil.PutCompressedUnicode(field_3_string, out1);
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}
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}
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public override int Size
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{
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get
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{
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return field_3_string.Length * (_is16bitUnicode ? 2 : 1) + 3;
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}
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}
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public override String ToFormulaString()
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{
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String value = field_3_string;
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int len = value.Length;
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StringBuilder sb = new StringBuilder(len + 4);
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sb.Append(FORMULA_DELIMITER);
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for (int i = 0; i < len; i++)
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{
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char c = value[i];
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if (c == FORMULA_DELIMITER)
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{
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sb.Append(FORMULA_DELIMITER);
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}
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sb.Append(c);
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}
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sb.Append(FORMULA_DELIMITER);
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return sb.ToString();
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}
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public override String ToString()
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{
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StringBuilder sb = new StringBuilder(64);
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sb.Append(GetType().Name).Append(" [");
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sb.Append(field_3_string);
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sb.Append("]");
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return sb.ToString();
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}
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}
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}
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