public void Close()
{
if (_BookStream != null)
{
_BookStream.Dispose();
_BookStream = null;
}
InnerAuthor = null;
InnerTitle = null;
_Catalogue = null;
_MD5 = null;
}
private void Open(String path)
{
try
{
_BookStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None);
var infoBuffer = new Byte[78];
if (_BookStream.Read(infoBuffer, 0, 78) != 78 && infoBuffer[64] != 0x4D || infoBuffer[65] != 0x54 || infoBuffer[66] != 0x49 || infoBuffer[67] != 0x55)
{
throw new NotSupportedException();
}
InnerAuthor = GetInfo(infoBuffer, 0, 34, true);
var record = ByteArrayToNumber(infoBuffer, 76, 2);
_Catalogue = new CatalogueInfo(record - 2);
//读取文件索引
infoBuffer = new Byte[record << 3];
if (_BookStream.Read(infoBuffer, 0, infoBuffer.Length) != infoBuffer.Length)
{
throw new NotSupportedException();
}
//根据索引读取电子书属性区内容
var bookInfoStop = ByteArrayToNumber(infoBuffer, 8, 4);
var dataBuffer = new Byte[bookInfoStop - ByteArrayToNumber(infoBuffer, 0, 4)];
if (_BookStream.Read(dataBuffer, 0, dataBuffer.Length) != dataBuffer.Length)
{
throw new NotSupportedException();
}
var startIndex = 10;
var flag = dataBuffer.QSIndexOf(THREEESC, startIndex);//书名,必须有，所以8+2
if (flag == -1)
{
throw new NotSupportedException();
}
InnerTitle = GetInfo(dataBuffer, 8, flag - 8);
startIndex = flag + 6; //章节数
flag = dataBuffer.QSIndexOf(ESC, startIndex);
if (flag == -1)
{
throw new NotSupportedException();
}
var numStr = Encoding.ASCII.GetString(dataBuffer, startIndex, flag - startIndex);
if (!Int32.TryParse(numStr, out var num) || num != record - 2)
{
throw new NotSupportedException();
}
startIndex = flag + 2; //目录
var indexBuffer = GetInfo(dataBuffer, startIndex, dataBuffer.Length - startIndex);
// var tempStringArray =Encoding.Unicode.GetString(indexBuffer).Split('\r');
//目录
Int32 PosA = bookInfoStop, PosB;
var maxIndex = _Catalogue.Capacity - 1;
var bookmark = (Int32)_BookStream.Length - 2;
var indexStartPos = 0;
var indexStopPos = 0;
//读取目录信息
for (Int32 i = 0; i < _Catalogue.Capacity; i++)
{
PosB = (i < maxIndex) ? ByteArrayToNumber(infoBuffer, 16 + (i << 3), 4) : bookmark;
indexStopPos = indexBuffer.QSIndexOf(CRNL, indexStartPos);
if (indexStopPos < 0)
{
indexStopPos = indexBuffer.Length;
}
_Catalogue.Add(new ChapterInfo(PosA, PosB - PosA, Encoding.Convert(Encoding.Unicode, Encoding.UTF8, indexBuffer, indexStartPos, indexStopPos - indexStartPos)));
// var q= Encoding.Unicode.GetString(indexBuffer,indexStartPos, indexStopPos - indexStartPos);
indexStartPos = indexStopPos + 4;
PosA = PosB;
}
//判断书籍长度是否合格
if (_Catalogue[maxIndex].Length + _Catalogue[maxIndex].Offset > bookmark)
{
throw new NotSupportedException();
}
// 计算摘要
using (var md5 = new MD5CryptoServiceProvider())
{
_MD5 = md5.ComputeHash(dataBuffer, 0, dataBuffer.Length);
}
}
catch { this.Close(); }
}
