Add an instruction abstraction and visitor.
Change-Id: I5dc935831471296b6db1affef6e7ddcdddc82dde
diff --git a/src/dex_instruction.cc b/src/dex_instruction.cc
new file mode 100644
index 0000000..83ebddc
--- /dev/null
+++ b/src/dex_instruction.cc
@@ -0,0 +1,27 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+
+#include "libdex/InstrUtils.h"
+#undef LOG
+#undef LOG_FATAL
+
+#include "src/dex_instruction.h"
+
+namespace art {
+
+size_t Instruction::Size() {
+ const uint16_t* insns = reinterpret_cast<const uint16_t*>(this);
+ return dexGetWidthFromInstruction(insns) * sizeof(uint16_t);
+}
+
+Instruction::Code Instruction::Opcode() {
+ const uint16_t* insns = reinterpret_cast<const uint16_t*>(this);
+ return (Instruction::Code)dexOpcodeFromCodeUnit(*insns);
+}
+
+const Instruction* Instruction::Next() {
+ size_t current_size = Size();
+ const uint8_t* ptr = reinterpret_cast<const uint8_t*>(this);
+ return reinterpret_cast<const Instruction*>(ptr + current_size);
+}
+
+} // namespace art