/// Count up to `(2^32)-1` occurrences of a byte in a slice

/// of bytes, simple

///

/// # Example

///

/// ```

/// let s = b"This is yet another Text with spaces";

/// let number_of_spaces = bytecount::naive_count_32(s, b' ');

/// assert_eq!(number_of_spaces, 6);

/// ```

pub fn naive_count_32(haystack: &[u8], needle: u8) -> usize {

    haystack.iter().fold(0, |n, c| n + (*c == needle) as u32) as usize

}

/// Count occurrences of a byte in a slice of bytes, simple

///

/// # Example

///

/// ```

/// let s = b"This is yet another Text with spaces";

/// let number_of_spaces = bytecount::naive_count(s, b' ');

/// assert_eq!(number_of_spaces, 6);

/// ```

pub fn naive_count(utf8_chars: &[u8], needle: u8) -> usize {

    utf8_chars

        .iter()

        .fold(0, |n, c| n + (*c == needle) as usize)

}

/// Count the number of UTF-8 encoded Unicode codepoints in a slice of bytes, simple

///

/// This function is safe to use on any byte array, valid UTF-8 or not,

/// but the output is only meaningful for well-formed UTF-8.

///

/// # Example

///

/// ```

/// let swordfish = "メカジキ";

/// let char_count = bytecount::naive_num_chars(swordfish.as_bytes());

/// assert_eq!(char_count, 4);

/// ```

pub fn naive_num_chars(utf8_chars: &[u8]) -> usize {

    utf8_chars

        .iter()

        .filter(|&&byte| (byte >> 6) != 0b10)

        .count()

}