complete 'cgpt show' and refactor for incoming commands.

src/platform/vboot_reference/utility/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.
  *
  * Header file for cgpt.
  */
 #ifndef VBOOT_REFERENCE_UTILITY_CGPT_CGPT_H_
 #define VBOOT_REFERENCE_UTILITY_CGPT_CGPT_H_
 
 #include <getopt.h>
@@ skipping 71 matching lines @@
                   const char *short_option,
                   const int option_count,
                   const struct option *options,
                   const struct option_details *details);
 
 struct drive;
 int OpenDriveInLastArgument(const int argc,
                             char *const *argv,
                             struct drive *drive);
 
+/* 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
+void StrToGuid(const char *str, Guid *guid);
+void GuidToStr(const Guid *guid, char *str);
+
+/* Convert UTF16 string to UTF8. Rewritten from gpt utility.
+ * Caller must prepare enough space for UTF8. The rough estimation is:
+ *
+ *   utf8 length = bytecount(utf16) * 1.5
+ */
+void UTF16ToUTF8(const uint16_t *utf16, uint8_t *utf8);
+/* Convert UTF8 string to UTF16. Rewritten from gpt utility.
+ * Caller must prepare enough space for UTF16. The conservative estimation is:
+ *
+ *   utf16 bytecount = bytecount(utf8) / 3 * 4
+ */
+void UTF8ToUTF16(const uint8_t *utf8, uint16_t *utf16);
+
 /* Describes the drive storing the GPT. */
 struct drive {
   int inited;       /* indicated if this structure is valid */
   int fd;           /* file descriptor */
   uint64_t size;    /* total size (in bytes) */
   GptData gpt;
 };
 
 extern const char* progname;
 
 /* Given a hard drive path, this function loads GPT sectors from that drive,
  * and fills 'drive' structure. All memory allocated in drive_open() will be
  * freed at drive_close().
  *
  * If 'drive_path' starts with '/', it is treated as absolute path.
  * If 'drive_path' starts with '.', it is treated as relative path.
  * Otherwise, it will be prepended with '/dev/' to comply with gpt.
  *
  * Returns CGPT_FAILED if any error happens.
  * Returns CGPT_OK if success and information are stored in 'drive'.
  */
 int DriveOpen(const char *drive_path, struct drive *drive);
 int DriveClose(struct drive *drive);
+int CheckValid(const struct drive *drive);
 
 /* Function declarations for commands.
  * The return value of these functions is passed to main()'s exit value. */
 int CgptAttribute(int argc, char *argv[]);
 int CgptRepair(int argc, char *argv[]);
 int CgptShow(int argc, char *argv[]);
 
 #endif  /* VBOOT_REFERENCE_UTILITY_CGPT_CGPT_H_ */