/// <summary>
/// Reads a string
/// </summary>
/// <param name="reader">Reader</param>
/// <param name="offset">Offset of string</param>
/// <returns>The string or <c>null</c> if we could not read it</returns>
private static string ReadString(IBinaryReader reader, uint offset)
{
reader.Position = offset;
if (!reader.CanRead(2))
{
return(null);
}
int size = reader.ReadUInt16();
int sizeInBytes = size * 2;
if (!reader.CanRead(sizeInBytes))
{
return(null);
}
var stringData = reader.ReadBytes(sizeInBytes);
try
{
return(Encoding.Unicode.GetString(stringData));
}
catch
{
return(null);
}
}
/// <summary>
/// Reads the directory header and initializes <see cref="ResourceDirectory.directories"/> and
/// <see cref="ResourceDirectory.data"/>.
/// </summary>
/// <param name="reader"></param>
void Initialize(IBinaryReader reader)
{
if (depth > MAX_DIR_DEPTH || !reader.CanRead(16))
{
InitializeDefault();
return;
}
characteristics = reader.ReadUInt32();
timeDateStamp = reader.ReadUInt32();
majorVersion = reader.ReadUInt16();
minorVersion = reader.ReadUInt16();
ushort numNamed = reader.ReadUInt16();
ushort numIds = reader.ReadUInt16();
int total = numNamed + numIds;
if (!reader.CanRead(total * 8))
{
InitializeDefault();
return;
}
dataInfos = new List <EntryInfo>();
dirInfos = new List <EntryInfo>();
long offset = reader.Position;
for (int i = 0; i < total; i++, offset += 8)
{
reader.Position = offset;
uint nameOrId = reader.ReadUInt32();
uint dataOrDirectory = reader.ReadUInt32();
ResourceName name;
if ((nameOrId & 0x80000000) != 0)
{
name = new ResourceName(ReadString(reader, nameOrId & 0x7FFFFFFF) ?? string.Empty);
}
else
{
name = new ResourceName((int)nameOrId);
}
if ((dataOrDirectory & 0x80000000) == 0)
{
dataInfos.Add(new EntryInfo(name, dataOrDirectory));
}
else
{
dirInfos.Add(new EntryInfo(name, dataOrDirectory & 0x7FFFFFFF));
}
}
directories = new LazyList <ResourceDirectory>(dirInfos.Count, null, (ctx, i) => ReadResourceDirectory((int)i));
data = new LazyList <ResourceData>(dataInfos.Count, null, (ctx, i) => ReadResourceData((int)i));
}
protected virtual IEnumerable <IInstruction> GetInstructions(IBinaryReader binaryReader, Context.IOperandReaderContext context)
{
int index = 0;
while (binaryReader.CanRead())
{
yield return(new Instruction(index++, binaryReader, context));
}
}
/// <summary>
/// Returns true if it's possibly resources file data
/// </summary>
/// <param name="reader">Reader</param>
/// <returns></returns>
public static bool CouldBeResourcesFile(IBinaryReader reader)
{
return(reader.CanRead(4) && reader.ReadUInt32() == 0xBEEFCACE);
}
/// <summary>
/// Returns true if it's possibly resources file data
/// </summary>
/// <param name="reader">Reader</param>
/// <returns></returns>
public static bool CouldBeResourcesFile(IBinaryReader reader) {
return reader.CanRead(4) && reader.ReadUInt32() == 0xBEEFCACE;
}
/// <summary>
/// Reads a string
/// </summary>
/// <param name="reader">Reader</param>
/// <param name="offset">Offset of string</param>
/// <returns>The string or <c>null</c> if we could not read it</returns>
static string ReadString(IBinaryReader reader, uint offset) {
reader.Position = offset;
if (!reader.CanRead(2))
return null;
int size = reader.ReadUInt16();
int sizeInBytes = size * 2;
if (!reader.CanRead(sizeInBytes))
return null;
var stringData = reader.ReadBytes(sizeInBytes);
try {
return Encoding.Unicode.GetString(stringData);
}
catch {
return null;
}
}
/// <summary>
/// Reads the directory header and initializes <see cref="ResourceDirectory.directories"/> and
/// <see cref="ResourceDirectory.data"/>.
/// </summary>
/// <param name="reader"></param>
void Initialize(IBinaryReader reader) {
if (depth > MAX_DIR_DEPTH || !reader.CanRead(16)) {
InitializeDefault();
return;
}
characteristics = reader.ReadUInt32();
timeDateStamp = reader.ReadUInt32();
majorVersion = reader.ReadUInt16();
minorVersion = reader.ReadUInt16();
ushort numNamed = reader.ReadUInt16();
ushort numIds = reader.ReadUInt16();
int total = numNamed + numIds;
if (!reader.CanRead(total * 8)) {
InitializeDefault();
return;
}
dataInfos = new List<EntryInfo>();
dirInfos = new List<EntryInfo>();
long offset = reader.Position;
for (int i = 0; i < total; i++, offset += 8) {
reader.Position = offset;
uint nameOrId = reader.ReadUInt32();
uint dataOrDirectory = reader.ReadUInt32();
ResourceName name;
if ((nameOrId & 0x80000000) != 0)
name = new ResourceName(ReadString(reader, nameOrId & 0x7FFFFFFF) ?? string.Empty);
else
name = new ResourceName((int)nameOrId);
if ((dataOrDirectory & 0x80000000) == 0)
dataInfos.Add(new EntryInfo(name, dataOrDirectory));
else
dirInfos.Add(new EntryInfo(name, dataOrDirectory & 0x7FFFFFFF));
}
directories = new LazyList<ResourceDirectory>(dirInfos.Count, null, (ctx, i) => ReadResourceDirectory((int)i));
data = new LazyList<ResourceData>(dataInfos.Count, null, (ctx, i) => ReadResourceData((int)i));
}
protected bool CanRead()
{
return(binaryReader.CanRead());
}
