[Courgette] Refactor: Manage AssemblyProgram and EncodedProgram with scoped_ptr.

courgette/program_detector.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COURGETTE_PROGRAM_DETECTOR_H_
+#define COURGETTE_PROGRAM_DETECTOR_H_
+
+#include <stddef.h>
+
+#include "base/memory/scoped_ptr.h"
+#include "courgette/courgette.h"
+
+namespace courgette {
+
+class AssemblyProgram;
+
+// Detects the type of an executable file, and it's length. The length may be
+// slightly smaller than some executables (like ELF), but will include all bytes
+// the courgette algorithm has special benefit for.
+// On success:
+//   Fills in |type| and |detected_length|, and returns C_OK.
+// On failure:
+//   Fills in |type| with UNKNOWN, |detected_length| with 0, and returns
+//   C_INPUT_NOT_RECOGNIZED.
+Status DetectExecutableType(const void* buffer,
+                            size_t length,
+                            ExecutableType* type,
+                            size_t* detected_length);
+
+// Attempts to detect the type of executable, and parse it with the appropriate
+// tools.
+// On success:
+//   Parses the executable into a new AssemblyProgram in |*output|, and returns
+//   C_OK.
+// On failure:
+//   Returns an error status and assigns |*output| to null.
+Status ParseDetectedExecutable(const void* buffer,
+                               size_t length,
+                               scoped_ptr<AssemblyProgram>* output);
+
+}  // namespace courgette
+
+#endif  // COURGETTE_PROGRAM_DETECTOR_H_