{

// String that we will convert to bytes

std::string example_string = "facaceca";

// Array of bytes we expect to get

uint8_t expected[4] = {0xfa, 0xca, 0xce, 0xca};

// Convert string to bytes

size_t result_size = 0;

uint8_t* result = ByteConvert::hex_string_to_block(example_string, &result_size);

// Check result

if (result_size != 4) {

// Error, unexpected size of result

delete[] result;

return -1;

}

for (size_t i = 0; i < result_size; i++) {

if (expected[i] != result[i]) {

// Error, result not expected

delete[] result;

return -2;

}

}

// Clear result !!! It was allocated to heap so we need to manualy free it !!!!!!

delete[] result;

// Same as above, just implemented with smart pointers, which is safer

std::unique_ptr<uint8_t[]> result1(ByteConvert::hex_string_to_block(example_string, &result_size));

// Check result

if (result_size != 4) {

// Error, unexpected size of result

return -1;

}

for (size_t i = 0; i < result_size; i++) {

if (expected[i] != result1[i]) {

// Error, result not expected

return -2;

}

}

// No need to free result1, because it clears itself when it goes out of scope

// Success

return 0;

}