/** @file
  Definition for Device Path Tool.

Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UefiDevicePathLib.h"

//
// Utility Name
//
#define UTILITY_NAME  "DevicePath"

//
// Utility version information
//
#define UTILITY_MAJOR_VERSION 0
#define UTILITY_MINOR_VERSION 1

EFI_GUID gEfiDebugPortProtocolGuid = DEVICE_PATH_MESSAGING_DEBUGPORT;
EFI_GUID gEfiPcAnsiGuid = EFI_PC_ANSI_GUID;
EFI_GUID gEfiVT100Guid = EFI_VT_100_GUID;
EFI_GUID gEfiVT100PlusGuid = EFI_VT_100_PLUS_GUID;
EFI_GUID gEfiVTUTF8Guid = EFI_VT_UTF8_GUID;
EFI_GUID gEfiUartDevicePathGuid = EFI_UART_DEVICE_PATH_GUID;
EFI_GUID gEfiSasDevicePathGuid = EFI_SAS_DEVICE_PATH_GUID;
EFI_GUID gEfiVirtualDiskGuid = EFI_VIRTUAL_DISK_GUID;
EFI_GUID gEfiVirtualCdGuid = EFI_VIRTUAL_CD_GUID;
EFI_GUID gEfiPersistentVirtualDiskGuid = EFI_PERSISTENT_VIRTUAL_DISK_GUID;
EFI_GUID gEfiPersistentVirtualCdGuid = EFI_PERSISTENT_VIRTUAL_CD_GUID;

STATIC
VOID
Version (
  VOID
)
/*++

Routine Description:

  Displays the standard utility information to SDTOUT

Arguments:

  None

Returns:

  None

--*/
{
  fprintf (stdout, "%s Version %d.%d %s \n", UTILITY_NAME, UTILITY_MAJOR_VERSION, UTILITY_MINOR_VERSION, __BUILD_VERSION);
}

STATIC
VOID
Usage (
  VOID
  )
/*++

Routine Description:

  Displays the utility usage syntax to STDOUT

Arguments:

  None

Returns:

  None

--*/
{
  //
  // Summary usage
  //
  fprintf (stdout, "\nUsage: %s [options]\n\n", UTILITY_NAME);

  //
  // Copyright declaration
  //
  fprintf (stdout, "Copyright (c) 2017, Intel Corporation. All rights reserved.\n\n");
  //
  // Details Option
  //
  fprintf (stdout, "Options:\n");
  fprintf (stdout, "  DevicePathString      Device Path string is specified, no space character.\n"
                   "                        Example: \"PciRoot(0)/Pci(0,0)\"\n");

  fprintf (stdout, "  --version             Show program's version number and exit.\n");
  fprintf (stdout, "  -h, --help            Show this help message and exit.\n");
}


STATIC
VOID
PrintMem (
  CONST VOID *Buffer,
  UINTN      Count
  )
{
  CONST UINT8 *Bytes;
  UINTN       Idx;

  Bytes = Buffer;
  for (Idx = 0; Idx < Count; Idx++) {
    printf("0x%02x ", Bytes[Idx]);
  }
}

VOID
Ascii2UnicodeString (
  CHAR8    *String,
  CHAR16   *UniString
 )
/*++

Routine Description:

  Write ascii string as unicode string format to FILE

Arguments:

  String      - Pointer to string that is written to FILE.
  UniString   - Pointer to unicode string

Returns:

  NULL

--*/
{
  while (*String != '\0') {
    *(UniString++) = (CHAR16) *(String++);
  }
  //
  // End the UniString with a NULL.
  //
  *UniString = '\0';
}

int main(int argc, CHAR8 *argv[])
{
  CHAR8 * Str;
  CHAR16* Str16;
  EFI_DEVICE_PATH_PROTOCOL *DevicePath;

  if (argc == 1) {
    Error (NULL, 0, 1001, "Missing options", "No input options specified.");
    Usage ();
    return STATUS_ERROR;
  }
  if ((stricmp (argv[1], "-h") == 0) || (stricmp (argv[1], "--help") == 0)) {
    Version ();
    Usage ();
    return STATUS_SUCCESS;
  }

  if (stricmp (argv[1], "--version") == 0) {
    Version ();
    return STATUS_SUCCESS;
  }
  Str = argv[1];
  if (Str == NULL) {
    fprintf(stderr, "Invalid option value, Device Path can't be NULL");
    return STATUS_ERROR;
  }
  Str16 = (CHAR16 *)malloc((strlen (Str) + 1) * sizeof (CHAR16));
  if (Str16 == NULL) {
    fprintf(stderr, "Resource, memory cannot be allocated");
    return STATUS_ERROR;
  }
  Ascii2UnicodeString(Str, Str16);
  DevicePath = UefiDevicePathLibConvertTextToDevicePath(Str16);
  if (DevicePath == NULL) {
    fprintf(stderr, "Convert fail, Cannot convert text to a device path");
    free(Str16);
    return STATUS_ERROR;
  }
  while (!((DevicePath->Type == END_DEVICE_PATH_TYPE) && (DevicePath->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE)) )
  {
    PrintMem (DevicePath, DevicePath->Length[0] | DevicePath->Length[1] << 8);
    DevicePath = (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)DevicePath + (DevicePath->Length[0] | DevicePath->Length[1] << 8));
  }
  PrintMem (DevicePath, DevicePath->Length[0] | DevicePath->Length[1] << 8);
  putchar('\n');
  free(Str16);
  return STATUS_SUCCESS;
}