first cut: establishes base helper classes and main

active_main_firmware.h

Index: active_main_firmware.h
diff --git a/active_main_firmware.h b/active_main_firmware.h
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+++ b/active_main_firmware.h
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+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Defines the ActiveMainFirmware class which extracts the firmware volume used
+// for boot.
+#ifndef CROS_BOOT_MODE_ACTIVE_MAIN_FIRMWARE_H_
+#define CROS_BOOT_MODE_ACTIVE_MAIN_FIRMWARE_H_
+
+#include <sys/types.h>
+
+#include "platform_reader.h"
+
+namespace cros_boot_mode {
+
+class ActiveMainFirmware : public PlatformReader {
+ public:
+  ActiveMainFirmware();
+  virtual ~ActiveMainFirmware();
+
+  enum {
+    kRecovery = 0,
+    kReadWriteA,
+    kReadWriteB,
+  };
+  static const char *kActiveMainFirmwareText[];
+  static const size_t kActiveMainFirmwareCount;
+
+  virtual const char *c_str() const;
+  virtual int Process(const char *contents, size_t length);
+  virtual const char *default_platform_file_path() const {
+    return "/sys/devices/platform/chromeos_acpi/BINF.1";
+  }
+  virtual const char *name() const {
+    return "active_main_firmware";
+  }
+  virtual size_t max_size() const {
+    return sizeof("-1");
+  }
+};
+
+}  // namespace cros_boot_mode
+#endif  // CROS_BOOT_MODE_ACTIVE_MAIN_FIRMWARE_H_