PSOV3Encryption: Add, and fully match `PSOV3Encryption`

Boy, that took way too long to match, mainly due to regalloc issues in
`update_stream()`.

1 files changed, 28 insertions, 0 deletions

diff --git a/context.h b/context.h
index de848b6..142e060 100644
--- a/context.h
+++ b/context.h
@@ -829,3 +829,31 @@ private:
 		return this->task_flags & flags;
 	};
 };
+
+// pso/PSOV3Encryption.h
+class PSOEncryption {
+public:
+	PSOEncryption();
+	virtual void update_stream() = 0;
+	virtual ~PSOEncryption();
+	virtual void encrypt(u32 seed) = 0;
+	virtual u32 next() = 0;
+};
+
+class PSOV3Encryption : public PSOEncryption {
+public:
+	PSOV3Encryption();
+	virtual void update_stream() override;
+	virtual ~PSOV3Encryption();
+	virtual void encrypt(u32 seed) override;
+	virtual u32 next() override;
+
+	PRIVATE_MEMBER_ACCESSORS_ARRAY(u32, buffer, 522);
+	PRIVATE_MEMBER_ACCESSORS(u32 *, buffer_start);
+	PRIVATE_MEMBER_ACCESSORS(u32 *, buffer_end);
+
+private:
+	TArray<u32, 522> m_buffer;
+	u32 *m_buffer_start;
+	u32 *m_buffer_end;
+};