/* ---------------------------------------------------------------------------------------------------------------------------------- */
public byte[] RetrieveTzarFile(PackTzarFile tzarFile)
{
byte[] fileBuffer = new byte [tzarFile.Size];
m_packStream.Seek(tzarFile.Offset, SeekOrigin.Begin);
m_packStream.Read(fileBuffer, 0, tzarFile.Size);
return(fileBuffer);
}
/* ---------------------------------------------------------------------------------------------------------------------------------- */
public static byte[] DecompressTzarFile(PackTzarFile fileInfo, WdtFile wdtFile)
{
byte[] fileBuffer = new byte[fileInfo.Size];
int fileStartChapter = fileInfo.Offset / wdtFile.PageSize;
int fileStartOffset = fileInfo.Offset % wdtFile.PageSize;
int fileChapterSpan = (fileInfo.Size + fileStartOffset) / wdtFile.PageSize + 1;
byte[] chaptersBuffer = new byte[fileChapterSpan * wdtFile.PageSize];
var chaptersStream = new MemoryStream(chaptersBuffer);
for (int i = 0; i < fileChapterSpan; i++)
{
DecompressChapter(wdtFile, wdtFile.ChapterList[fileStartChapter + i], chaptersStream);
}
chaptersStream.Seek(fileStartOffset, SeekOrigin.Begin);
chaptersStream.Read(fileBuffer, 0, fileInfo.Size);
return(fileBuffer);
}
/* ---------------------------------------------------------------------------------------------------------------------------------- */
void ParseFromPackFileStream(Stream packFileStream)
{
packFileStream.Seek(CONTENTS_OFFSET, SeekOrigin.Begin);
var decompressedContents = new BinaryReader(packFileStream);
int numberOfFiles = decompressedContents.ReadInt32();
int archiveSize = decompressedContents.ReadInt32();
m_packTzarFiles = new List <PackTzarFile> (numberOfFiles);
StringBuilder filePathBuilder = new StringBuilder(256);
// Read first tzar file
byte nameLength = decompressedContents.ReadByte();
byte nameReuseLength = decompressedContents.ReadByte();
filePathBuilder.Append(decompressedContents.ReadChars(nameLength));
int fileOffset = decompressedContents.ReadInt32();
int fileLength = decompressedContents.ReadInt32();
PackTzarFile lastTzarFile = new PackTzarFile(filePathBuilder.ToString(), nameLength, fileLength, fileOffset);
// Read subsequent tzar files
for (int i = 0; i < numberOfFiles - 1; i++)
{
nameLength = decompressedContents.ReadByte();
nameReuseLength = decompressedContents.ReadByte();
filePathBuilder.Remove(nameReuseLength, filePathBuilder.Length - nameReuseLength);
filePathBuilder.Append(decompressedContents.ReadChars(nameLength - nameReuseLength));
fileOffset = decompressedContents.ReadInt32();
fileLength = decompressedContents.ReadInt32();
lastTzarFile = new PackTzarFile(filePathBuilder.ToString(), nameLength, fileLength, fileOffset);
m_packTzarFiles.Add(lastTzarFile);
}
}
