internal static Dictionary <string, GrfEntry> ReadEntries(string grfFilePath, GrfHeader header, LoadingMode loadingMode)
{
var entries = new Dictionary <string, GrfEntry>();
using (var fileStream = File.OpenRead(grfFilePath))
using (var bodyStream = new ZlibStream(fileStream, CompressionMode.Decompress))
using (var bodyReader = new BinaryReader(bodyStream))
{
// skip 4 byte compressed body size
// skip 4 byte uncompressed body size
fileStream.Seek(header.FileTablePosition + 8, SeekOrigin.Begin);
for (int i = 0; i < header.FileCount; i++)
{
var fileName = string.Empty;
char currentChar;
while ((currentChar = (char)bodyReader.ReadByte()) != 0)
{
fileName += currentChar;
}
var compressedFileSize = bodyReader.ReadUInt32();
var compressedFileSizeAligned = bodyReader.ReadUInt32();
var uncompressedFileSize = bodyReader.ReadUInt32();
var fileFlags = (FileFlag)bodyReader.ReadByte();
var fileDataOffset = bodyReader.ReadUInt32();
// skip directories and files with zero size
if (!fileFlags.HasFlag(FileFlag.File) || uncompressedFileSize == 0)
{
continue;
}
entries.Add(
fileName,
new GrfEntry(
fileName,
(uint)header.Size + fileDataOffset,
compressedFileSize,
compressedFileSizeAligned,
uncompressedFileSize,
fileFlags,
null));
}
}
return(entries);
}
internal static Dictionary <string, GrfEntry> ReadEntries(string grfFilePath, GrfHeader header, LoadingMode loadingMode)
{
var entries = new Dictionary <string, GrfEntry>();
using (var fileStream = File.OpenRead(grfFilePath))
using (var binaryReader = new BinaryReader(fileStream))
{
binaryReader.BaseStream.Seek(header.FileTablePosition, SeekOrigin.Begin);
int currentEntryOffset = 0;
for (int i = 0; i < header.FileCount; i++)
{
binaryReader.BaseStream.Seek(header.FileTablePosition + currentEntryOffset, SeekOrigin.Begin);
int nameLength = binaryReader.PeekChar() - 6;
int entryOffset = currentEntryOffset + binaryReader.ReadInt32() + 4;
binaryReader.ReadBytes(2);
var encodedName = binaryReader.ReadBytes(nameLength);
var fileName = DecodeFileName(encodedName.AsSpan());
binaryReader.BaseStream.Seek(header.FileTablePosition + entryOffset, SeekOrigin.Begin);
uint compressedFileSizeBase = binaryReader.ReadUInt32();
uint compressedFileSizeAligned = binaryReader.ReadUInt32() - 37579;
uint uncompressedFileSize = binaryReader.ReadUInt32();
uint compressedFileSize = compressedFileSizeBase - uncompressedFileSize - 715;
var fileFlags = (FileFlag)binaryReader.ReadByte();
fileFlags |= IsFullEncrypted(fileName)
? FileFlag.Mixed
: FileFlag.DES;
uint fileDataOffset = binaryReader.ReadUInt32() + (uint)header.Size;
// skip directories and files with zero size
if (!fileFlags.HasFlag(FileFlag.File) || uncompressedFileSize == 0)
{
continue;
}
entries.Add(
fileName,
new GrfEntry(
fileName,
fileDataOffset,
compressedFileSize,
compressedFileSizeAligned,
uncompressedFileSize,
fileFlags,
null));
currentEntryOffset = entryOffset + 17;
}
}
return(entries);
}
internal static Dictionary <string, GrfEntry> ReadEntries(string grfFilePath, GrfHeader header, LoadingMode loadingMode)
{
switch (header.Version)
{
case GrfFormat.Version102:
case GrfFormat.Version103:
return(Grf1xxFileReader.ReadEntries(grfFilePath, header, loadingMode));
case GrfFormat.Version200:
return(Grf2xxFileReader.ReadEntries(grfFilePath, header, loadingMode));
default:
throw new NotImplementedException($"Version {header.Version} of GRF files is currently not supported.");
}
}
