#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <regex.h>


int match (const char *string, char *pattern) {
    int status;
    regex_t re;

    // Compile the pattern for extended REGEX with only Y/N feedback (validates it too)
    if (regcomp(&re, pattern, REG_EXTENDED | REG_NOSUB) != 0) {
        return -1;
    }

    // See if pattern validates input
    status = regexec(&re, string, (size_t) 0, NULL, 0);

    // Free allocated memory
    regfree(&re);

    // Output result on standard-out
    if (status == 0) {
        fprintf(stdout, "Match!\n");
    } else {
        fprintf(stdout, "No match!\n");
    }

    return 0;
}

int main (void) {

    const char string[3] = {0xFF, 0xFF, 0x0};
    char *pattern = "^\\xFF\\xFF$";
    printf("Pattern = %s\n", pattern);

    if (match(string, pattern) != 0) {
        fprintf(stderr, "Err: Something went wrong in match!\n");
        return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}