private static GrtPackge _create(Stream _stream)
{
lock ( s_buffer )
{
GrtPackge package = new GrtPackge();
_stream.Seek(-8, SeekOrigin.End);
_stream.Read(s_buffer, 0, 8);
Int64 start_idx = BitConverter.ToInt64(s_buffer, 0);
_stream.Seek(start_idx, SeekOrigin.Begin);
// 读取描述段
while (_stream.Position < _stream.Length - 8)
{
GrtFile grt_file = new GrtFile();
_stream.Read(s_buffer, 0, 8);
grt_file.Size = BitConverter.ToInt64(s_buffer, 0);
_stream.Read(s_buffer, 0, 8);
grt_file.CompressedSize = BitConverter.ToInt64(s_buffer, 0);
_stream.Read(s_buffer, 0, 8);
grt_file.Offset = BitConverter.ToInt64(s_buffer, 0);
Byte file_name_length = (Byte)_stream.ReadByte();
_stream.Read(s_buffer, 0, file_name_length);
grt_file.Name = System.Text.Encoding.UTF8.GetString(s_buffer, 0, file_name_length);
package.m_files.Add(grt_file.Name, grt_file);
Debug.LogFormat("name: {0}, size: {1} compressed_size: {2}, offset: {3}", grt_file.Name, grt_file.Size, grt_file.CompressedSize, grt_file.Offset);
}
return(package);
}
}
public void UnloadFile(String _name)
{
GrtFile grt_file = null;
if (!m_files.TryGetValue(_name, out grt_file))
{
return;
}
grt_file.Bytes = null;
}
/// <summary>
/// 加载一个文件，并且缓存
/// </summary>
/// <param name="_name"></param>
/// <returns></returns>
public Byte[] LoadFile(String _name)
{
try
{
Int32 count = m_files.Count;
GrtFile grt_file = null;
if (!m_files.TryGetValue(_name, out grt_file))
{
Debug.LogErrorFormat("[GrtPackage.LoadFile]: {0} not in this package!", _name);
return(null);
}
if (grt_file.Bytes != null)
{
return(grt_file.Bytes);
}
// 如果路径为空，表示需要从内存读取
if (m_package_path == null)
{
using (MemoryStream ms = new MemoryStream(m_bytes))
{
ms.Seek(grt_file.Offset, SeekOrigin.Begin);
_decompress(ms, grt_file.CompressedSize, grt_file.Size, out grt_file.Bytes);
}
}
else
{
using (FileStream fs = new FileStream(m_package_path, FileMode.Open))
{
fs.Seek(grt_file.Offset, SeekOrigin.Begin);
_decompress(fs, grt_file.CompressedSize, grt_file.Size, out grt_file.Bytes);
}
}
return(grt_file.Bytes);
}
catch (FileNotFoundException)
{
Debug.LogErrorFormat("[GrtPackage.LoadFile]: Can't Load file from GrtPackage, package: {0} no longer exist!", m_package_path);
}
catch (Exception e)
{
Debug.LogErrorFormat("[GrtPackage.LoadFile]: " + e);
}
return(null);
}
public static void Pack(String _src_path, String _output_root, String _name)
{
String output = String.Concat(_output_root, "/", _name);
if (!Directory.Exists(_src_path))
{
Log.Error("[GrtFielEditor]: 打包目录: {0} 不存在！", _src_path);
return;
}
try
{
DirectoryInfo di = new DirectoryInfo(_src_path);
var files = FileHelper.GetAllFileInfo(_src_path);
List <GrtFile> pack_files = new List <GrtFile>();
foreach (FileInfo file_info in files)
{
GrtFile grt_file = new GrtFile();
grt_file.Bytes = FileHelper.ReadAllBytesFromFile(file_info.FullName);
grt_file.Size = grt_file.Bytes.Length;
grt_file.Name = FileHelper.GetRelativePath(file_info.FullName, di.FullName);
pack_files.Add(grt_file);
}
FileHelper.CreateDirectoryByFilePath(output);
using (FileStream fs = new FileStream(output, FileMode.Create, FileAccess.Write))
{
Int64 offset = 0;
// 压缩，写入文件
foreach (GrtFile pack_file_info in pack_files)
{
Byte[] compressed_bytes;
pack_file_info.Offset = offset;
_compress(pack_file_info.Bytes, out compressed_bytes, out pack_file_info.CompressedSize);
fs.Write(compressed_bytes, 0, (Int32)pack_file_info.CompressedSize);
offset += pack_file_info.CompressedSize;
}
//offset = fs.Length; // 描述段开始的位置
Byte[] bytes;
// 写入文件列表
foreach (GrtFile pack_file_info in pack_files)
{
// 压缩前的size
bytes = BitConverter.GetBytes(pack_file_info.Size);
if (!BitConverter.IsLittleEndian)
{
Array.Reverse(bytes);
}
fs.Write(bytes, 0, bytes.Length);
// 压缩后的size
bytes = BitConverter.GetBytes(pack_file_info.CompressedSize);
if (!BitConverter.IsLittleEndian)
{
Array.Reverse(bytes);
}
fs.Write(bytes, 0, bytes.Length);
// 写入偏移值
bytes = BitConverter.GetBytes(pack_file_info.Offset);
if (!BitConverter.IsLittleEndian)
{
Array.Reverse(bytes);
}
fs.Write(bytes, 0, bytes.Length);
// 名字
bytes = System.Text.Encoding.UTF8.GetBytes(pack_file_info.Name);
if (bytes.Length > 255)
{
throw new Exception("文件名称超过255位，不能打包!");
}
fs.WriteByte((Byte)bytes.Length); // 名字长度最大不超过256个字节
fs.Write(bytes, 0, bytes.Length);
}
bytes = BitConverter.GetBytes(offset);
if (!BitConverter.IsLittleEndian)
{
Array.Reverse(bytes);
}
fs.Write(bytes, 0, bytes.Length);
fs.Flush();
StringBuilder sb = new StringBuilder(1024);
sb.AppendFormat("GrtPackage打包成功： {0}\n", _name);
foreach (GrtFile pack_file_info in pack_files)
{
sb.AppendLine(pack_file_info.Name);
}
//Debug.Log( sb );
}
}
catch (Exception e)
{
Debug.LogError(e);
}
}
