How to check if a string starts with another string in C?

Question

Is there something like startsWith(str_a, str_b) in the standard C library?

It should take pointers to two strings that end with nullbytes, and tell me

Answer 1

Because I ran the accepted version and had a problem with a very long str, I had to add in the following logic:

bool longEnough(const char *str, int min_length) {
    int length = 0;
    while (str[length] && length < min_length)
        length++;
    if (length == min_length)
        return true;
    return false;
}

bool startsWith(const char *pre, const char *str) {
    size_t lenpre = strlen(pre);
    return longEnough(str, lenpre) ? strncmp(str, pre, lenpre) == 0 : false;
}