/*
 * SPDX-License-Identifier: LicenseRef-CSSL-1.0
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>


#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "DaylightSavingTime.h"

int decode_daylight_saving_time(DaylightSavingTime *daylightsavingtime, uint8_t iei, uint8_t *buffer, uint32_t len)
{
  int decoded = 0;
  uint8_t ielen = 0;

  if (iei > 0) {
    CHECK_IEI_DECODER(iei, *buffer);
    decoded++;
  }

  ielen = *(buffer + decoded);
  decoded++;
  CHECK_LENGTH_DECODER(len - decoded, ielen);
  *daylightsavingtime = *buffer & 0x3;
  decoded++;
#if defined (NAS_DEBUG)
  dump_daylight_saving_time_xml(daylightsavingtime, iei);
#endif
  return decoded;
}
int encode_daylight_saving_time(DaylightSavingTime *daylightsavingtime, uint8_t iei, uint8_t *buffer, uint32_t len)
{
  uint8_t *lenPtr;
  uint32_t encoded = 0;
  /* Checking IEI and pointer */
  CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, DAYLIGHT_SAVING_TIME_MINIMUM_LENGTH, len);
#if defined (NAS_DEBUG)
  dump_daylight_saving_time_xml(daylightsavingtime, iei);
#endif

  if (iei > 0) {
    *buffer = iei;
    encoded++;
  }

  lenPtr  = (buffer + encoded);
  encoded ++;
  *(buffer + encoded) = 0x00 |
                        (*daylightsavingtime & 0x3);
  encoded++;
  *lenPtr = encoded - 1 - ((iei > 0) ? 1 : 0);
  return encoded;
}

void dump_daylight_saving_time_xml(DaylightSavingTime *daylightsavingtime, uint8_t iei)
{
  printf("<Daylight Saving Time>\n");

  if (iei > 0)
    /* Don't display IEI if = 0 */
    printf("    <IEI>0x%X</IEI>\n", iei);

  printf("    <Value>%u</Value>\n", *daylightsavingtime);
  printf("</Daylight Saving Time>\n");
}