qred 0.1.2

A fast, light-footprint native QR code generator with custom color styling.
Documentation 
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#[derive(Debug, Default)]
pub struct BitBuffer {
    pub data: Vec<u8>,
    bit_count: usize,
}

impl BitBuffer {
    pub fn new() -> Self {
        Self {
            data: Vec::new(),
            bit_count: 0,
        }
    }

    pub fn push_bits(&mut self, val: u32, num_bits: usize) {
        for i in (0..num_bits).rev() {
            let bit = ((val >> i) & 1) as u8;
            if self.bit_count % 8 == 0 {
                self.data.push(0);
            }

            let byte_idx = self.data.len() - 1;
            let bit_idx = 7 - (self.bit_count % 8);
            self.data[byte_idx] |= bit << bit_idx;
            self.bit_count += 1;
        }
    }

    pub fn len_bits(&self) -> usize {
        self.bit_count
    }

    pub fn to_bytes(&self) -> Vec<u8> {
        self.data.clone()
    }
}