public ResourceReader(Stream stream)
{
if (stream==null)
throw new ArgumentNullException("stream");
if (!stream.CanRead)
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotReadable"));
_table = new Hashtable(FastResourceComparer.Default, FastResourceComparer.Default);
_store = new BinaryReader(stream, Encoding.UTF8);
// We have a faster code path for reading resource files from an assembly.
_ums = stream as __UnmanagedMemoryStream;
BCLDebug.Log("RESMGRFILEFORMAT", "ResourceReader .ctor(Stream). UnmanagedMemoryStream: "+(_ums!=null));
ReadResources();
}
private void Dispose(bool disposing)
{
if (_store != null) {
if (disposing) {
// Close the stream in a thread-safe way. This fix means
// that we may call Close n times, but that's safe.
BinaryReader copyOfStore = _store;
if (copyOfStore != null)
copyOfStore.Close();
}
_store = null;
_table = null;
_namePositions = null;
_nameHashes = null;
_ums = null;
_namePositionsPtr = null;
_nameHashesPtr = null;
}
}
// Reads in the header information for a .resources file. Verifies some
// of the assumptions about this resource set, and builds the class table
// for the default resource file format.
private void ReadResources()
{
BinaryFormatter bf = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.File | StreamingContextStates.Persistence));
// Do partial binds so we can be tolerant of version number changes.
bf.AssemblyFormat = FormatterAssemblyStyle.Simple;
_objFormatter = bf;
try {
// Read ResourceManager header
// Check for magic number
int magicNum = _store.ReadInt32();
if (magicNum != ResourceManager.MagicNumber)
throw new ArgumentException("Stream is not a valid resource file!");
// Assuming this is ResourceManager header V1 or greater, hopefully
// after the version number there is a number of bytes to skip
// to bypass the rest of the ResMgr header.
int resMgrHeaderVersion = _store.ReadInt32();
if (resMgrHeaderVersion > 1) {
int numBytesToSkip = _store.ReadInt32();
BCLDebug.Log("RESMGRFILEFORMAT", LogLevel.Status, "ReadResources: Unexpected ResMgr header version: {0} Skipping ahead {1} bytes.", resMgrHeaderVersion, numBytesToSkip);
BCLDebug.Assert(numBytesToSkip >= 0, "numBytesToSkip in ResMgr header should be positive!");
_store.BaseStream.Seek(numBytesToSkip, SeekOrigin.Current);
}
else {
BCLDebug.Log("RESMGRFILEFORMAT", "ReadResources: Parsing ResMgr header v1.");
_store.ReadInt32(); // We don't care about numBytesToSkip.
// Read in type name for a suitable ResourceReader
// Note ResourceWriter & InternalResGen use different Strings.
String readerType = _store.ReadString();
if (!readerType.Equals(ResourceManager.ResReaderTypeName) &&
!readerType.Equals(typeof(ResourceReader).FullName) &&
!readerType.Equals(ResourceManager.ResReaderTypeNameInternal)) {
throw new NotSupportedException("This .resources file shouldn't be used with this reader. Your resource reader type: "+readerType);
}
// Skip over type name for a suitable ResourceSet
_store.ReadString();
}
// Read RuntimeResourceSet header
// Do file version check
int version = _store.ReadInt32();
if (version != RuntimeResourceSet.Version)
throw new ArgumentException(String.Format("Version conflict with ResourceManager .resources files! Expected version: {0} but got: {1}", RuntimeResourceSet.Version, version));
_numResources = _store.ReadInt32();
BCLDebug.Log("RESMGRFILEFORMAT", "ReadResources: Expecting "+ _numResources+ " resources.");
#if _DEBUG
if (ResourceManager.DEBUG >= 4)
Console.WriteLine("ResourceReader::ReadResources - Reading in "+_numResources+" resources");
#endif
// Read type names into type array.
int numTypes = _store.ReadInt32();
_typeTable = new Type[numTypes];
for(int i=0; i<numTypes; i++) {
String typeName = _store.ReadString();
// Do partial binds to be tolerant of version number changes.
_typeTable[i] = Assembly.LoadTypeWithPartialName(typeName, false);
if (_typeTable[i] == null)
throw new TypeLoadException(Environment.GetResourceString("TypeLoad_PartialBindFailed", typeName));
}
#if _DEBUG
if (ResourceManager.DEBUG >= 5)
Console.WriteLine("ResourceReader::ReadResources - Reading in "+numTypes+" type table entries");
#endif
// Prepare to read in the array of name hashes
// Note that the name hashes array is aligned to 8 bytes so
// we can use pointers into it on 64 bit machines. (4 bytes
// may be sufficient, but let's plan for the future)
// Skip over alignment stuff, if it's present.
long pos = _store.BaseStream.Position;
int alignBytes = ((int)pos) & 7;
bool fileIsAligned = true;
if (alignBytes != 0) {
// For backwards compatibility, don't require the "PAD" stuff
// in here, but we should definitely skip it if present.
for(int i=0; i<8 - alignBytes; i++) {
byte b = _store.ReadByte();
if (b != "PAD"[i % 3]) {
fileIsAligned = false;
break;
}
}
// If we weren't aligned, we shouldn't have skipped this data!
if (!fileIsAligned)
_store.BaseStream.Position = pos;
else {
BCLDebug.Assert((_store.BaseStream.Position & 7) == 0, "ResourceReader: Stream should be aligned on an 8 byte boundary now!");
}
}
#if RESOURCE_FILE_FORMAT_DEBUG
Console.WriteLine("ResourceReader: File alignment: "+fileIsAligned);
#endif
#if !WIN32
if (!fileIsAligned)
_ums = null;
#endif
// Read in the array of name hashes
#if RESOURCE_FILE_FORMAT_DEBUG
// Skip over "HASHES->"
_store.BaseStream.Position += 8;
#endif
if (_ums == null) {
_nameHashes = new int[_numResources];
for(int i=0; i<_numResources; i++)
_nameHashes[i] = _store.ReadInt32();
}
else {
_nameHashesPtr = (int*) _ums.GetBytePtr();
// Skip over the array of nameHashes.
_ums.Seek(4 * _numResources, SeekOrigin.Current);
}
// Read in the array of relative positions for all the names.
#if RESOURCE_FILE_FORMAT_DEBUG
// Skip over "POS---->"
_store.BaseStream.Position += 8;
#endif
if (_ums == null) {
_namePositions = new int[_numResources];
for(int i=0; i<_numResources; i++)
_namePositions[i] = _store.ReadInt32();
}
else {
_namePositionsPtr = (int*) _ums.GetBytePtr();
// Skip over the array of namePositions.
_ums.Seek(4 * _numResources, SeekOrigin.Current);
}
// Read location of data section.
_dataSectionOffset = _store.ReadInt32();
// Store current location as start of name section
_nameSectionOffset = _store.BaseStream.Position;
BCLDebug.Log("RESMGRFILEFORMAT", String.Format("ReadResources: _nameOffset = 0x{0:x} _dataOffset = 0x{1:x}", _nameSectionOffset, _dataSectionOffset));
}
catch (EndOfStreamException eof) {
throw new ArgumentException("Stream is not a valid .resources file! It was possibly truncated.", eof);
}
}
// This is the constructor the RuntimeResourceSet calls,
// passing in the stream to read from and the RuntimeResourceSet's
// internal hash table (hash table of names with file offsets
// and values, coupled to this ResourceReader).
internal ResourceReader(Stream stream, Hashtable table)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (table == null)
throw new ArgumentNullException("table");
if (!stream.CanRead)
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotReadable"));
_table = table;
_store = new BinaryReader(stream, Encoding.UTF8);
_ums = stream as __UnmanagedMemoryStream;
BCLDebug.Log("RESMGRFILEFORMAT", "ResourceReader .ctor(Stream, Hashtable). UnmanagedMemoryStream: "+(_ums!=null));
ReadResources();
}
