/// <summary>
/// Constructor
/// </summary>
/// <param name="stream">IMG stream</param>
/// <param name="mode">IMG archive mode</param>
/// <param name="entryNameEncoding">Entry name encoding</param>
internal IMGArchive(Stream stream, EIMGArchiveAccessMode mode, Encoding entryNameEncoding, Dictionary <string, IIMGArchiveEntry> entries)
{
Stream = stream;
AccessMode = mode;
EntryNameEncoding = entryNameEncoding;
InternalEntries = entries;
}
/// <summary>
/// Open IMG archive
/// </summary>
/// <param name="imgArchiveFilePath">IMG archive file path</param>
/// <param name="accessMode">IMG archive access mode</param>
/// <param name="entryNameEncoding">IMG archive entry name encoding</param>
/// <returns>IMG archive</returns>
/// <exception cref="InvalidOperationException">Return value is null</exception>
/// <exception cref="ArgumentNullException">Archive file name is null</exception>
/// <exception cref="FileNotFoundException">Archive file not found</exception>
/// <exception cref="InvalidDataException">Archive error</exception>
public static IIMGArchive Open(string imgArchiveFilePath, EIMGArchiveAccessMode accessMode, Encoding entryNameEncoding)
{
if (imgArchiveFilePath == null)
{
throw new ArgumentNullException(nameof(imgArchiveFilePath));
}
if (entryNameEncoding == null)
{
throw new ArgumentNullException(nameof(entryNameEncoding));
}
IMGArchive ret = null;
try
{
if ((accessMode != EIMGArchiveAccessMode.Create) && (!File.Exists(imgArchiveFilePath)))
{
throw new FileNotFoundException("Archive not found", imgArchiveFilePath);
}
FileStream archive_file_stream = File.Open(imgArchiveFilePath, (accessMode == EIMGArchiveAccessMode.Create) ? FileMode.Create : FileMode.Open, (accessMode != EIMGArchiveAccessMode.Read) ? FileAccess.ReadWrite : FileAccess.Read);
if (archive_file_stream == null)
{
throw new FileNotFoundException("Archive not found", imgArchiveFilePath);
}
Dictionary <string, IIMGArchiveEntry> img_archive_entries = new Dictionary <string, IIMGArchiveEntry>();
ret = new IMGArchive(archive_file_stream, accessMode, entryNameEncoding, img_archive_entries);
if (accessMode == EIMGArchiveAccessMode.Create)
{
byte[] new_data = new byte[2048];
new_data[0] = 0x56;
new_data[1] = 0x45;
new_data[2] = 0x52;
new_data[3] = 0x32;
archive_file_stream.Write(new_data, 0, new_data.Length);
}
else
{
using (BinaryReader archive_file_stream_binary_reader = new BinaryReader(archive_file_stream, entryNameEncoding, true))
{
int archive_version = archive_file_stream_binary_reader.ReadInt32();
if (archive_version != SupportedIMGArchiveVersion)
{
throw new InvalidDataException($"Invalid IMG archive version { archive_version }.");
}
uint num_entries = archive_file_stream_binary_reader.ReadUInt32();
if (archive_file_stream.Length < (num_entries * 8))
{
throw new InvalidDataException($"IMG archive file size is smaller than expected.");
}
for (uint num_entry = 0U; num_entry != num_entries; num_entry++)
{
long offset = archive_file_stream_binary_reader.ReadInt32() * 2048L;
int length = archive_file_stream_binary_reader.ReadInt16() * 2048;
short dummy = archive_file_stream_binary_reader.ReadInt16();
byte[] full_name_bytes_raw = new byte[24];
if (archive_file_stream_binary_reader.Read(full_name_bytes_raw, 0, full_name_bytes_raw.Length) != full_name_bytes_raw.Length)
{
throw new InvalidDataException("IMG entry name is missing.");
}
int full_name_bytes_count = IMGUtilities.GetNullTerminatedByteStringLength(full_name_bytes_raw);
if (full_name_bytes_count <= 0)
{
throw new InvalidDataException("IMG entry name can't be empty.");
}
string full_name = entryNameEncoding.GetString(full_name_bytes_raw, 0, full_name_bytes_count);
img_archive_entries.Add(full_name.ToLower(), new IMGArchiveEntry(ret, offset, length, full_name));
}
}
}
if (ret == null)
{
throw new InvalidOperationException("Return value is null");
}
}
catch (Exception e)
{
ret?.Dispose();
throw e;
}
return(ret);
}
/// <summary> /// Open IMG archive /// </summary> /// <param name="imgArchiveFilePath">IMG archive file path</param> /// <param name="accessMode">IMG archive access mode</param> /// <returns>IMG archive</returns> /// <exception cref="InvalidOperationException">Return value is null</exception> /// <exception cref="ArgumentNullException">Archive file name is null</exception> /// <exception cref="FileNotFoundException">Archive file not found</exception> /// <exception cref="InvalidDataException">Archive error</exception> public static IIMGArchive Open(string imgArchiveFilePath, EIMGArchiveAccessMode accessMode) => Open(imgArchiveFilePath, accessMode, Encoding.UTF8);
