How to compare uint8_t array to a string in C?

Question

I have an input which comes over UART.

uint8_t uartRX_data[UART_RX_BUF_SIZE]="";

I need to pass this data to a function. And, in this function I want to compare it with predefined strings like:

char RESP_OK[]                  = "OK";
char RESP_ERROR[]               = "ERROR";
char RESP_FAIL[]                = "FAIL";

What is the easiest way to do that?

EDIT: My problem is only about the data comparison and data passing to a function.

Answer 1

As long as the string in uartRX_data is NULL terminated you should be able to use strcmp like so:

if (strcmp((const char *)uartRX_data, RESP_OK) == 0)
{
  // handle OK
}
else if (strcmp((const char *)uartRX_data, RESP_ERROR) == 0)
{
  // handle ERROR
}
else if (strcmp((const char *)uartRX_data, RESP_FAIL) == 0)
{
  // handle FAIL
}
else
{
  // handle unknown response
}