internal static void UnpackMegFile(string megFilePath, string targetDirectory)
{
bool megFilePathExists = File.Exists(megFilePath);
bool targetDirectoryExists = PathUtility.CreatePath(targetDirectory);
if (!megFilePathExists)
{
throw new ArgumentNullException($"The specified *.meg file at {megFilePath} does not exist.");
}
if (!targetDirectoryExists)
{
throw new ArgumentException($"The directory {targetDirectory} could not be found or created. The provided path is invalid.");
}
MegFile megFile = LoadMegFileFromDisk(megFilePath);
using (BinaryReader reader = new BinaryReader(new FileStream(megFilePath, FileMode.Open)))
{
foreach (MegFileContentTableRecord megFileContentTableRecord in megFile.ContentTable.MegFileContentTableRecords)
{
UnpackFile(targetDirectory, megFileContentTableRecord, megFile, reader);
}
}
}
private static void UnpackFile(string targetDirectory, MegFileContentTableRecord megFileContentTableRecord, MegFile megFile, BinaryReader reader)
{
byte[] file = new byte[megFileContentTableRecord.FileSizeInBytes];
string fileName = megFile.FileNameTable.MegFileNameTableRecords[Convert.ToInt32(megFileContentTableRecord.FileNameTableRecordIndex)].FileName;
reader.BaseStream.Seek(Convert.ToInt32(megFileContentTableRecord.FileStartOffsetInBytes), SeekOrigin.Begin);
reader.Read(file, 0, file.Length);
string path = Path.Combine(targetDirectory, fileName);
PathUtility.CreatePath(Path.GetDirectoryName(path));
using (BinaryWriter writer = new BinaryWriter(File.Open(path, FileMode.Create)))
{
writer.Write(file);
}
}