complete 'cgpt show' and refactor for incoming commands.

src/platform/vboot_reference/cgptlib/cgptlib.h

 /* 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.
  */
 
 #ifndef VBOOT_REFERENCE_CGPTLIB_H_
 #define VBOOT_REFERENCE_CGPTLIB_H_
 
 #include "gpt.h"
 #include <stdint.h>
@@ skipping 70 matching lines @@
   uint64_t drive_sectors;        /* Size of drive in LBA sectors, in sectors */
 
   /* Outputs */
   uint8_t modified;              /* Which inputs have been modified?
                                   * 0x01 = header1
                                   * 0x02 = header2
                                   * 0x04 = table1
                                   * 0x08 = table2  */
   int current_kernel; /* the current chromeos kernel index in partition table.
                        * -1 means not found on drive. */
+
+  /* Internal variables */
+  uint32_t valid_headers, valid_entries;
 } GptData;
 
 int GptInit(GptData *gpt);
 /* Initializes the GPT data structure's internal state.  The following fields
  * must be filled before calling this function:
  *
  *   primary_header
  *   secondary_header
  *   primary_entries
  *   secondary_entries
@@ skipping 27 matching lines @@
  * of update (GPT_UPDATE_ENTRY_*).
  *
  * On return the modified field may be set, if the GPT data has been modified
  * and should be written to disk.
  *
  * Returns GPT_SUCCESS if successful, else
  *   GPT_ERROR_INVALID_UPDATE_TYPE, invalid 'update_type' is given.
  */
 
 #endif  /* VBOOT_REFERENCE_CGPTLIB_H_ */