fix: split files, add padding and return checking on disasm

include/radhook/private/disassemble.h

@@ -0,0 +1,57 @@
+#ifndef __LIBRADHOOK_PRIVATE_DISASSEMBLE_H__
+#define __LIBRADHOOK_PRIVATE_DISASSEMBLE_H__
+
+#include "radhook/defines.h"
+
+#if defined(RADIUM_PLATFORM_WINDOWS)
+# ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+# endif
+# include <windows.h>
+#elif defined(RADIUM_PLATFORM_ANDROID)
+# include <sys/mman.h>
+# include <unistd.h>
+#endif
+
+#if defined(RADHOOK_ARCH_X64)
+struct X64Insn {
+    size_t length = 0;
+    bool ripRelative = false;
+    size_t dispOffset = 0;
+    bool relativeControlFlow = false;
+    bool isReturn = false;
+    bool isPadding = false;
+    bool valid = false;
+};
+
+X64Insn 
+DecodeX64(
+    const uint8_t* p, 
+    size_t avail
+    );
+
+constexpr size_t kX64StubLen = 14;      // FF25 00000000 + imm64
+constexpr size_t kX64MaxStolen = 32;
+constexpr size_t kX64MaxRipFixups = 8;
+
+enum class StolenBytesError {
+    None,
+    BadDecode,
+    RelativeControlFlow,
+    TooManyRipFixups,
+    ExceedsMaxStolen,
+    InsufficientLength,
+};
+
+StolenBytesError 
+BuildStolenBytesX64(
+    const uint8_t* target, 
+    size_t minLen,
+    uint8_t* outBytes, 
+    size_t& outLen,
+    size_t* outRipOffsets, 
+    size_t& outRipCount
+    );
+
+#endif // defined(RADHOOK_ARCH_X64)
+#endif // __LIBRADHOOK_PRIVATE_DISASSEMBLE_H__