public void WriteSourceBlock(BinaryWriter writer, int roomVersion)
{
byte[] buffer = AGSStringUtils.GetASCIIBytes(SourceCode);
//NOTE(adm244): not a bug, it encrypts by decrypting
buffer = AGSEncryption.DecryptAvisBuffer(buffer);
writer.Write((Int32)buffer.Length);
writer.Write((byte[])buffer);
}
public void ReadSourceBlock(BinaryReader reader, int roomVersion)
{
int length = reader.ReadInt32();
byte[] buffer = reader.ReadBytes(length);
//NOTE(adm244): not a bug, it decrypts by encrypting
buffer = AGSEncryption.EncryptAvisBuffer(buffer);
SourceCode = AGSStringUtils.ConvertToString(buffer);
}
public static string DecryptSalt(string textEncrypted, int salt)
{
byte[] bufferDecrypted = new byte[textEncrypted.Length];
for (int i = 0; i < bufferDecrypted.Length; ++i)
{
//NOTE(adm244): convert char to byte before subtracting, so we underflow properly
bufferDecrypted[i] = (byte)((byte)textEncrypted[i] - salt);
}
return(AGSStringUtils.ConvertCString(bufferDecrypted));
}
public static string ReadFixedCString(this BinaryReader reader, int length)
{
if (length < 1)
{
return(string.Empty);
}
if (reader.EOF())
{
return(string.Empty);
}
char[] buffer = reader.ReadChars(length);
//NOTE(adm244): the reason why we use ConvertCString here is that we expect that
// the string can be null-terminated (when it's actual length is less the the length specified)
// Should we consider using a different method for this case??
return(AGSStringUtils.ConvertCString(buffer));
}
private ReferencedString[] GetReferencedStrings(byte[] stringsBlob)
{
var strings = new List <ReferencedString>();
for (int i = 0; i < Fixups.Length; ++i)
{
if (Fixups[i].Type == Fixup.FixupType.String)
{
Debug.Assert(Fixups[i].Offset > 0);
Debug.Assert(Fixups[i].Offset < Code.Length);
int index = Code[Fixups[i].Offset];
string stringReferenced = AGSStringUtils.ConvertCString(stringsBlob, index);
strings.Add(new ReferencedString()
{
Text = stringReferenced,
Offset = Fixups[i].Offset
});
}
}
return(strings.ToArray());
}
public static unsafe string DecryptAvis(byte[] bufferEncrypted)
{
byte[] bufferDecrypted = DecryptAvisBuffer(bufferEncrypted);
return(AGSStringUtils.ConvertCString(bufferDecrypted));
}
private void ReadStringsSection(BinaryReader reader, int size)
{
_stringsBlob = reader.ReadBytes(size);
StringsStored = AGSStringUtils.ConvertNullTerminatedSequence(_stringsBlob);
}
