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

Optimized (v.2. - corrected):

uint32 startsWith( const void* prefix_, const void* str_ ) {
    uint8 _cp, _cs;
    const uint8* _pr = (uint8*) prefix_;
    const uint8* _str = (uint8*) str_;
    while ( ( _cs = *_str++ ) & ( _cp = *_pr++ ) ) {
        if ( _cp != _cs ) return 0;
    }
    return !_cp;
}