Add 'prioritize' command to cgpt tool.

cgpt/cgpt.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_UTILITY_CGPT_CGPT_H_
 #define VBOOT_REFERENCE_UTILITY_CGPT_CGPT_H_
 
 #define _GNU_SOURCE
 #define _FILE_OFFSET_BITS 64
 #include <features.h>
@@ skipping 54 matching lines @@
 /* GUID conversion functions. Accepted format:
  *
  *   "C12A7328-F81F-11D2-BA4B-00A0C93EC93B"
  *
  * At least GUID_STRLEN bytes should be reserved in 'str' (included the tailing
  * '\0').
  */
 #define GUID_STRLEN 37
 int StrToGuid(const char *str, Guid *guid);
 void GuidToStr(const Guid *guid, char *str, unsigned int buflen);
+int GuidEqual(const Guid *guid1, const Guid *guid2);
 int IsZero(const Guid *guid);
 
+/* Constant global type values to compare against */
+extern const Guid guid_chromeos_kernel;
+extern const Guid guid_chromeos_rootfs;
+extern const Guid guid_linux_data;
+extern const Guid guid_chromeos_reserved;
+extern const Guid guid_efi;
+extern const Guid guid_unused;
 
 int ReadPMBR(struct drive *drive);
 int WritePMBR(struct drive *drive);
 
-
 /* Convert possibly unterminated UTF16 string to UTF8.
  * Caller must prepare enough space for UTF8, which could be up to
  * twice the byte length of UTF16 string plus the terminating '\0'.
  *
  * Return: CGPT_OK --- all character are converted successfully.
  *         CGPT_FAILED --- convert error, i.e. output buffer is too short.
  */
 int UTF16ToUTF8(const uint16_t *utf16, unsigned int maxinput,
                 uint8_t *utf8, unsigned int maxoutput);
 
@@ skipping 34 matching lines @@
 void Error(const char *format, ...);
 
 
 // Command functions.
 int cmd_show(int argc, char *argv[]);
 int cmd_repair(int argc, char *argv[]);
 int cmd_create(int argc, char *argv[]);
 int cmd_add(int argc, char *argv[]);
 int cmd_boot(int argc, char *argv[]);
 int cmd_find(int argc, char *argv[]);
+int cmd_prioritize(int argc, char *argv[]);
 
 #define ARRAY_COUNT(array) (sizeof(array)/sizeof((array)[0]))
 const char *GptError(int errnum);
 
 // Size in chars of the GPT Entry's PartitionName field
 #define GPT_PARTNAME_LEN 72
 
 /* The standard "assert" macro goes away when NDEBUG is defined. This doesn't.
  */
 #define require(A) do { \
   if (!(A)) { \
     fprintf(stderr, "condition (%s) failed at %s:%d\n", \
             #A, __FILE__, __LINE__); \
     exit(1); } \
   } while (0)
 
 #endif  // VBOOT_REFERENCE_UTILITY_CGPT_CGPT_H_