/*---------------------------------------------------------------------------*\

  FILE........: tqam16.c
  AUTHOR......: David Rowe
  DATE CREATED: August 2020

  Simple sanity check for QAM16 symbol mapping.

\*---------------------------------------------------------------------------*/

#include <stdio.h>
#include <string.h>

#include "ofdm_internal.h"

int main(void) {
  int c;
  for (c = 0; c < 16; c++) {
    int tx_bits[4], rx_bits[4];
    for (int i = 0; i < 4; i++) tx_bits[i] = (c >> (3 - i)) & 0x1;
    complex float symbol = qam16_mod(tx_bits);
    qam16_demod(symbol, rx_bits);
    if (memcmp(tx_bits, rx_bits, 4)) {
      fprintf(stderr, "FAIL on %d!\ntx_bits: ", c);
      for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", tx_bits[i]);
      fprintf(stderr, "%f %f\nrx_bits: ", creal(symbol), cimag(symbol));
      for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", rx_bits[i]);
      fprintf(stderr, "%f %f\n", creal(symbol), cimag(symbol));
      return 1;
    }
  }

  fprintf(stderr, "%d tested OK...\nPASS!\n", c);
  return 0;
}