qrism 0.1.0

A Rust library for generating and reading QR codes with Reed-Solomon error correction. Supports traditional monochromatic QR codes with additional experimental multicolor QR support for enhanced storage capacity.
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use super::{galois::*, Block, MAX_BLOCK_SIZE};

// Compute ecc
//------------------------------------------------------------------------------

impl Block {
    // Performs polynomial long division with data polynomial(num)
    // and generator polynomial(den) to compute remainder polynomial,
    // the coefficients of which are the ecc
    pub fn compute_ecc(&mut self) -> &[u8] {
        let eclen = self.len - self.dlen;
        let mut gen_poly = [G(0); MAX_BLOCK_SIZE];
        for (i, &b) in GENERATOR_POLYNOMIALS[eclen].iter().enumerate() {
            gen_poly[i] = G::gen_pow(b as usize);
        }

        let mut rem = [G(0); MAX_BLOCK_SIZE]; // Remainder polynomial
        for (i, &b) in self.data[..self.dlen].iter().enumerate() {
            rem[i] = G(b);
        }

        for i in 0..self.dlen {
            let lead_coeff = rem[i];
            for (u, v) in rem[i + 1..].iter_mut().zip(gen_poly.iter()) {
                *u += *v * lead_coeff;
            }
        }

        for (i, &G(b)) in rem[self.dlen..self.len].iter().enumerate() {
            self.data[self.dlen + i] = b;
        }

        self.full()
    }
}

#[cfg(test)]
mod ec_tests {
    use super::Block;

    #[test]
    fn test_compute_ecc_1() {
        let res = Block::new(b" [\x0bx\xd1r\xdcMC@\xec\x11\xec\x11\xec\x11", 26);
        assert_eq!(res.ecc(), b"\xc4#'w\xeb\xd7\xe7\xe2]\x17");
    }

    #[test]
    fn test_compute_ecc_2() {
        let res = Block::new(b" [\x0bx\xd1r\xdcMC@\xec\x11\xec", 26);
        assert_eq!(res.ecc(), b"\xa8H\x16R\xd96\x9c\x00.\x0f\xb4z\x10");
    }

    #[test]
    fn test_compute_ecc_3() {
        let res = Block::new(b"CUF\x86W&U\xc2w2\x06\x12\x06g&", 33);
        assert_eq!(res.ecc(), b"\xd5\xc7\x0b-s\xf7\xf1\xdf\xe5\xf8\x9au\x9aoV\xa1o'");
    }
}

// Global constants
//------------------------------------------------------------------------------

static GENERATOR_POLYNOMIALS: [&[u8]; 70] = [
    b"",
    b"\x00",
    b"\x19\x01",
    b"\xc6\xc7\x03",
    b"\x4b\xf9\x4e\x06",
    b"\x71\xa4\xa6\x77\x0a",
    b"\xa6\x00\x86\x05\xb0\x0f",
    b"\x57\xe5\x92\x95\xee\x66\x15",
    b"\xaf\xee\xd0\xf9\xd7\xfc\xc4\x1c",
    b"\x5f\xf6\x89\xe7\xeb\x95\x0b\x7b\x24",
    b"\xfb\x43\x2e\x3d\x76\x46\x40\x5e\x20\x2d",
    b"\xdc\xc0\x5b\xc2\xac\xb1\xd1\x74\xe3\x0a\x37",
    b"\x66\x2b\x62\x79\xbb\x71\xc6\x8f\x83\x57\x9d\x42",
    b"\x4a\x98\xb0\x64\x56\x64\x6a\x68\x82\xda\xce\x8c\x4e",
    b"\xc7\xf9\x9b\x30\xbe\x7c\xda\x89\xd8\x57\xcf\x3b\x16\x5b",
    b"\x08\xb7\x3d\x5b\xca\x25\x33\x3a\x3a\xed\x8c\x7c\x05\x63\x69",
    b"\x78\x68\x6b\x6d\x66\xa1\x4c\x03\x5b\xbf\x93\xa9\xb6\xc2\xe1\x78",
    b"\x2b\x8b\xce\x4e\x2b\xef\x7b\xce\xd6\x93\x18\x63\x96\x27\xf3\xa3\x88",
    b"\xd7\xea\x9e\x5e\xb8\x61\x76\xaa\x4f\xbb\x98\x94\xfc\xb3\x05\x62\x60\x99",
    b"\x43\x03\x69\x99\x34\x5a\x53\x11\x96\x9f\x2c\x80\x99\x85\xfc\xde\x8a\xdc\xab",
    b"\x11\x3c\x4f\x32\x3d\xa3\x1a\xbb\xca\xb4\xdd\xe1\x53\xef\x9c\xa4\xd4\xd4\xbc\xbe",
    b"\xf0\xe9\x68\xf7\xb5\x8c\x43\x62\x55\xc8\xd2\x73\x94\x89\xe6\x24\x7a\xfe\x94\xaf\xd2",
    b"\xd2\xab\xf7\xf2\x5d\xe6\x0e\x6d\xdd\x35\xc8\x4a\x08\xac\x62\x50\xdb\x86\xa0\x69\xa5\xe7",
    b"\xab\x66\x92\x5b\x31\x67\x41\x11\xc1\x96\x0e\x19\xb7\xf8\x5e\xa4\xe0\xc0\x01\x4e\x38\x93\xfd",
    b"\xe5\x79\x87\x30\xd3\x75\xfb\x7e\x9f\xb4\xa9\x98\xc0\xe2\xe4\xda\x6f\x00\x75\xe8\x57\x60\xe3\x15",
    b"\xe7\xb5\x9c\x27\xaa\x1a\x0c\x3b\x0f\x94\xc9\x36\x42\xed\xd0\x63\xa7\x90\xb6\x5f\xf3\x81\xb2\xfc\x2d",
    b"\xad\x7d\x9e\x02\x67\xb6\x76\x11\x91\xc9\x6f\x1c\xa5\x35\xa1\x15\xf5\x8e\x0d\x66\x30\xe3\x99\x91\xda\x46",
    b"\x4f\xe4\x08\xa5\xe3\x15\xb4\x1d\x09\xed\x46\x63\x2d\x3a\x8a\x87\x49\x7e\xac\x5e\xd8\xc1\x9d\x1a\x11\x95\x60",
    b"\xa8\xdf\xc8\x68\xe0\xea\x6c\xb4\x6e\xbe\xc3\x93\xcd\x1b\xe8\xc9\x15\x2b\xf5\x57\x2a\xc3\xd4\x77\xf2\x25\x09\x7b",
    b"\x9c\x2d\xb7\x1d\x97\xdb\x36\x60\xf9\x18\x88\x05\xf1\xaf\xbd\x1c\x4b\xea\x96\x94\x17\x09\xca\xa2\x44\xfa\x8c\x18\x97",
    b"\x29\xad\x91\x98\xd8\x1f\xb3\xb6\x32\x30\x6e\x56\xef\x60\xde\x7d\x2a\xad\xe2\xc1\xe0\x82\x9c\x25\xfb\xd8\xee\x28\xc0\xb4",
    b"\x14\x25\xfc\x5d\x3f\x4b\xe1\x1f\x73\x53\x71\x27\x2c\x49\x7a\x89\x76\x77\x90\xf8\xf8\x37\x01\xe1\x69\x7b\xb7\x75\xbb\xc8\xd2",
    b"\x0a\x06\x6a\xbe\xf9\xa7\x04\x43\xd1\x8a\x8a\x20\xf2\x7b\x59\x1b\x78\xb9\x50\x9c\x26\x45\xab\x3c\x1c\xde\x50\x34\xfe\xb9\xdc\xf1",
    b"\xf5\xe7\x37\x18\x47\x4e\x4c\x51\xe1\xd4\xad\x25\xd7\x2e\x77\xe5\xf5\xa7\x7e\x48\xb5\x5e\xa5\xd2\x62\x7d\x9f\xb8\xa9\xe8\xb9\xe7\x12",
    b"\x6f\x4d\x92\x5e\x1a\x15\x6c\x13\x69\x5e\x71\xc1\x56\x8c\xa3\x7d\x3a\x9e\xe5\xef\xda\x67\x38\x46\x72\x3d\xb7\x81\xa7\x0d\x62\x3e\x81\x33",
    b"\x07\x5e\x8f\x51\xf7\x7f\xca\xca\xc2\x7d\x92\x1d\x8a\xa2\x99\x41\x69\x7a\x74\xee\x1a\x24\xd8\x70\x7d\xe4\x0f\x31\x08\xa2\x1e\x7e\x6f\x3a\x55",
    b"\xc8\xb7\x62\x10\xac\x1f\xf6\xea\x3c\x98\x73\x00\xa7\x98\x71\xf8\xee\x6b\x12\x3f\xda\x25\x57\xd2\x69\xb1\x78\x4a\x79\xc4\x75\xfb\x71\xe9\x1e\x78",
    b"\x9a\x4b\x8d\xb4\x3d\xa5\x68\xe8\x2e\xe3\x60\xb2\x5c\x87\x39\xa2\x78\xc2\xd4\xae\xfc\xb7\x2a\x23\x9d\x6f\x17\x85\x64\x08\x69\x25\xc0\xbd\x9f\x13\x9c",
    b"\x9f\x22\x26\xe4\xe6\x3b\xf3\x5f\x31\xda\xb0\xa4\x14\x41\x2d\x6f\x27\x51\x31\x76\x71\xde\xc1\xfa\xf2\xa8\xd9\x29\xa4\xf7\xb1\x1e\xee\x12\x78\x99\x3c\xc1",
    b"\x51\xd8\xae\x2f\xc8\x96\x3b\x9c\x59\x8f\x59\xa6\xb7\xaa\x98\x15\xa5\xb1\x71\x84\xea\x05\x9a\x44\x7c\xaf\xc4\x9d\xf9\xe9\x53\x18\x99\xf1\x7e\x24\x74\x13\xe7",
    b"\x3b\x74\x4f\xa1\xfc\x62\x80\xcd\x80\xa1\xf7\x39\xa3\x38\xeb\x6a\x35\x1a\xbb\xae\xe2\x68\xaa\x07\xaf\x23\xb5\x72\x58\x29\x2f\xa3\x7d\x86\x48\x14\xe8\x35\x23\x0f",
    b"\x84\xa7\x34\x8b\xb8\xdf\x95\x5c\xfa\x12\x53\x21\x7f\x6d\xc2\x07\xd3\xf2\x6d\x42\x56\xa9\x57\x60\xbb\x9f\x72\xac\x76\xd0\xb7\xc8\x52\xb3\x26\x27\x22\xf2\x8e\x93\x37",
    b"\xfa\x67\xdd\xe6\x19\x12\x89\xe7\x00\x03\x3a\xf2\xdd\xbf\x6e\x54\xe6\x08\xbc\x6a\x60\x93\x0f\x83\x8b\x22\x65\xdf\x27\x65\xd5\xc7\xed\xfe\xc9\x7b\xab\xa2\xc2\x75\x32\x60",
    b"\x60\x43\x03\xf5\xd9\xd7\x21\x41\xf0\x6d\x90\x3f\x15\x83\x26\x65\x99\x80\x37\x1f\xed\x03\x5e\xa0\x14\x57\x4d\x38\xbf\x7b\xcf\x4b\x52\x00\x7a\x84\x65\x91\xd7\x0f\x79\xc0\x8a",
    b"\xbe\x07\x3d\x79\x47\xf6\x45\x37\xa8\xbc\x59\xf3\xbf\x19\x48\x7b\x09\x91\x0e\xf7\x01\xee\x2c\x4e\x8f\x3e\xe0\x7e\x76\x72\x44\xa3\x34\xc2\xd9\x93\xcc\xa9\x25\x82\x71\x66\x49\xb5",
    b"\x06\xac\x48\xfa\x12\xab\xab\xa2\xe5\xbb\xef\x04\xbb\x0b\x25\xe4\x66\x48\x66\x16\x21\x49\x5f\x63\x84\x01\x0f\x59\x04\x70\x82\x5f\xd3\xeb\xe3\x3a\x23\x58\x84\x17\x2c\xa5\x36\xbb\xe1",
    b"\x70\x5e\x58\x70\xfd\xe0\xca\x73\xbb\x63\x59\x05\x36\x71\x81\x2c\x3a\x10\x87\xd8\xa9\xd3\x24\x01\x04\x60\x3c\xf1\x49\x68\xea\x08\xf9\xf5\x77\xae\x34\x19\x9d\xe0\x2b\xca\xdf\x13\x52\x0f",
    b"\x4c\xa4\xe5\x5c\x4f\xa8\xdb\x6e\x68\x15\xdc\x4a\x13\xc7\xc3\x64\x5d\xbf\x2b\xd5\x48\x38\x8a\xa1\x7d\xbb\x77\xfa\xbd\x89\xbe\x4c\x7e\xf7\x5d\x1e\x84\x06\x3a\xd5\xd0\xa5\xe0\x98\x85\x5b\x3d",
    b"\xe4\x19\xc4\x82\xd3\x92\x3c\x18\xfb\x5a\x27\x66\xf0\x3d\xb2\x3f\x2e\x7b\x73\x12\xdd\x6f\x87\xa0\xb6\xcd\x6b\xce\x5f\x96\x78\xb8\x5b\x15\xf7\x9c\x8c\xee\xbf\x0b\x5e\xe3\x54\x32\xa3\x27\x22\x6c",
    b"\xac\x79\x01\x29\xc1\xde\xed\x40\x6d\xb5\x34\x78\xd4\xe2\xef\xf5\xd0\x14\xf6\x22\xe1\xcc\x86\x65\x7d\xce\x45\x8a\xfa\x00\x4d\x3a\x8f\xb9\xdc\xfe\xd2\xbe\x70\x58\x5b\x39\x5a\x6d\x05\x0d\xb5\x19\x9c",
    b"\xe8\x7d\x9d\xa1\xa4\x09\x76\x2e\xd1\x63\xcb\xc1\x23\x03\xd1\x6f\xc3\xf2\xcb\xe1\x2e\x0d\x20\xa0\x7e\xd1\x82\xa0\xf2\xd7\xf2\x4b\x4d\x2a\xbd\x20\x71\x41\x7c\x45\xe4\x72\xeb\xaf\x7c\xaa\xd7\xe8\x85\xcd",
    b"\xd5\xa6\x8e\x2b\x0a\xd8\x8d\xa3\xac\xb4\x66\x46\x59\x3e\xde\x3e\x2a\xd2\x97\xa3\xda\x46\x4d\x27\xa6\xbf\x72\xca\xf5\xbc\xb7\xdd\x4b\xd4\x1b\xed\x7f\xcc\xeb\x3e\xbe\xe8\x12\x2e\xab\x0f\x62\xf7\x42\xa3\x00",
    b"\x74\x32\x56\xba\x32\xdc\xfb\x59\xc0\x2e\x56\x7f\x7c\x13\xb8\xe9\x97\xd7\x16\x0e\x3b\x91\x25\xf2\xcb\x86\xfe\x59\xbe\x5e\x3b\x41\x7c\x71\x64\xe9\xeb\x79\x16\x4c\x56\x61\x27\xf2\xc8\xdc\x65\x21\xef\xfe\x74\x33",
    b"\x7a\xd6\xe7\x88\xc7\x0b\x06\xcd\x7c\x48\xd5\x75\xbb\x3c\x93\xc9\x49\x4b\x21\x92\xab\xf7\x76\xd0\x9d\xb1\xcb\xeb\x53\x2d\xe2\xca\xe5\xa8\x07\x39\xed\xeb\xc8\x7c\x6a\xfe\xa5\x0e\x93\x00\x39\x2a\x1f\xb2\xd5\xad\x67",
    b"\xb7\x1a\xc9\x57\xd2\xdd\x71\x15\x2e\x41\x2d\x32\xee\xb8\xf9\xe1\x66\x3a\xd1\xda\x6d\xa5\x1a\x5f\xb8\xc0\x34\xf5\x23\xfe\xee\xaf\xac\x4f\x7b\x19\x7a\x2b\x78\x6c\xd7\x50\x80\xc9\xeb\x08\x99\x3b\x65\x1f\xc6\x4c\x1f\x9c",
    b"\x26\xc5\x7b\xa7\x10\x57\xb2\xee\xe3\x61\x94\xf7\x1a\x5a\xe4\xb6\xec\xc5\x2f\xf9\x24\xd5\x36\x71\xb5\x4a\xb1\xcc\x9b\x3d\x2f\x2a\x00\x84\x90\xfb\xc8\x26\x26\x8a\x36\x2c\x40\x13\x16\xce\x10\x0a\xe4\xd3\xa1\xab\x2c\xc2\xd2",
    b"\x6a\x78\x6b\x9d\xa4\xd8\x70\x74\x02\x5b\xf8\xa3\x24\xc9\xca\xe5\x06\x90\xfe\x9b\x87\xd0\xaa\xd1\x0c\x8b\x7f\x8e\xb6\xf9\xb1\xae\xbe\x1c\x0a\x55\xef\xb8\x65\x7c\x98\xce\x60\x17\xa3\x3d\x1b\xc4\xf7\x97\x9a\xca\xcf\x14\x3d\x0a",
    b"\x3a\x8c\xed\x5d\x6a\x3d\xc1\x02\x57\x49\xc2\xd7\x9f\xa3\x0a\x9b\x05\x79\x99\x3b\xf8\x04\x75\x16\x3c\xb1\x90\x2c\x48\xe4\x3e\x01\x13\xaa\x71\x9e\x19\xaf\xc7\x8b\x5a\x01\xd2\x07\x77\x9a\x59\x9f\x82\x7a\x2e\x93\xbe\x87\x5e\x44\x42",
    b"\x52\x74\x1a\xf7\x42\x1b\x3e\x6b\xfc\xb6\xc8\xb9\xeb\x37\xfb\xf2\xd2\x90\x9a\xed\xb0\x8d\xc0\xf8\x98\xf9\xce\x55\xfd\x8e\x41\xa5\x7d\x17\x18\x1e\x7a\xf0\xd6\x06\x81\xda\x1d\x91\x7f\x86\xce\xf5\x75\x1d\x29\x3f\x9f\x8e\xe9\x7d\x94\x7b",
    b"\x39\x73\xe8\x0b\xc3\xd9\x03\xce\x4d\x43\x1d\xa6\xb4\x6a\x76\xcb\x11\x45\x98\xd5\x4a\x2c\x31\x2b\x62\x3d\xfd\x7a\x0e\x2b\xd1\x8f\x09\x68\x6b\xab\xe0\x39\xfe\xfb\xe2\xe8\xdd\xc2\xf0\x75\xa1\x52\xb2\xf6\xb2\x21\x32\x56\xd7\xef\xb4\xb4\xb5",
    b"\x6b\x8c\x1a\x0c\x09\x8d\xf3\xc5\xe2\xc5\xdb\x2d\xd3\x65\xdb\x78\x1c\xb5\x7f\x06\x64\xf7\x02\xcd\xc6\x39\x73\xdb\x65\x6d\xa0\x52\x25\x26\xee\x31\xa0\xd1\x79\x56\x0b\x7c\x1e\xb5\x54\x19\xc2\x57\x41\x66\xbe\xdc\x46\x1b\xd1\x10\x59\x07\x21\xf0",
    b"\xa1\xf4\x69\x73\x40\x09\xdd\xec\x10\x91\x94\x22\x90\xba\x0d\x14\xfe\xf6\x26\x23\xca\x48\x04\xd4\x9f\xd3\xa5\x87\xfc\xfa\x19\x57\x1e\x78\xe2\xea\x5c\xc7\x48\x07\x9b\xda\xe7\x2c\x7d\xb2\x9c\xae\x7c\x2b\x64\x1f\x38\x65\xcc\x40\xaf\xe1\xa9\x92\x2d",
    b"\x41\xca\x71\x62\x47\xdf\xf8\x76\xd6\x5e\x00\x7a\x25\x17\x02\xe4\x3a\x79\x07\x69\x87\x4e\xf3\x76\x46\x4c\xdf\x59\x48\x32\x46\x6f\xc2\x11\xd4\x7e\xb5\x23\xdd\x75\xeb\x0b\xe5\x95\x93\x7b\xd5\x28\x73\x06\xc8\x64\x1a\xf6\xb6\xda\x7f\xd7\x24\xba\x6e\x6a",
    b"\x1e\x47\x24\x47\x13\xc3\xac\x6e\x3d\x02\xa9\xc2\x5a\x88\x3b\xb6\xe7\x91\x66\x27\xaa\xe7\xd6\x43\xc4\xcf\x35\x70\xf6\x5a\x5a\x79\xb7\x92\x4a\x4d\x26\x59\x16\xe7\x37\x38\xf2\x70\xd9\x6e\x7b\x3e\xc9\xd9\x80\xa5\x3c\xb5\x25\xa1\xf6\x84\xf6\x12\x73\x88\xa8",
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];