// AUTOGENERATED FROM index-iso-8859-6.txt, ORIGINAL COMMENT FOLLOWS:
//
// For details on index index-iso-8859-6.txt see the Encoding Standard
// https://encoding.spec.whatwg.org/
//
// Identifier: 85bb7b5c2dc75975afebe5743935ba4ed5a09c1e9e34e9bfb2ff80293f5d8bbc
// Date: 2018-01-06

#[allow(dead_code)] const X: u16 = 0xffff;

const FORWARD_TABLE: &[u16] = &[
    128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146,
    147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, X, X, X, 164, X, X, X, X,
    X, X, X, 1548, 173, X, X, X, X, X, X, X, X, X, X, X, X, X, 1563, X, X, X, 1567, X, 1569, 1570,
    1571, 1572, 1573, 1574, 1575, 1576, 1577, 1578, 1579, 1580, 1581, 1582, 1583, 1584, 1585, 1586,
    1587, 1588, 1589, 1590, 1591, 1592, 1593, 1594, X, X, X, X, X, 1600, 1601, 1602, 1603, 1604,
    1605, 1606, 1607, 1608, 1609, 1610, 1611, 1612, 1613, 1614, 1615, 1616, 1617, 1618, X, X, X, X,
    X, X, X, X, X, X, X, X, X,
]; // 128 entries

/// Returns the index code point for pointer `code` in this index.
#[inline]
pub fn forward(code: u8) -> u16 {
    FORWARD_TABLE[(code - 0x80) as usize]
}

#[cfg(not(feature = "no-optimized-legacy-encoding"))]
const BACKWARD_TABLE_LOWER: &[u8] = &[
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203,
    204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 0, 0, 0, 0, 0, 128,
    129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
    148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 0, 0, 0, 164, 0, 0, 0, 0, 0,
    0, 0, 0, 173, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 172, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 187, 0, 0, 0, 191,
]; // 179 entries

#[cfg(not(feature = "no-optimized-legacy-encoding"))]
const BACKWARD_TABLE_UPPER: &[u16] = &[
    0, 0, 0, 0, 95, 127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 147, 63, 32,
]; // 51 entries

/// Returns the index pointer for code point `code` in this index.
#[inline]
#[cfg(not(feature = "no-optimized-legacy-encoding"))]
pub fn backward(code: u32) -> u8 {
    let offset = (code >> 5) as usize;
    let offset = if offset < 51 {BACKWARD_TABLE_UPPER[offset] as usize} else {0};
    BACKWARD_TABLE_LOWER[offset + ((code & 31) as usize)]
}

/// Returns the index pointer for code point `code` in this index.
#[cfg(feature = "no-optimized-legacy-encoding")]
pub fn backward(code: u32) -> u8 {
    if code > 1618 || ((0x3000004u32 >> (code >> 6)) & 1) == 0 { return 0; }
    let code = code as u16;
    for i in 0..0x80 {
        if FORWARD_TABLE[i as usize] == code { return 0x80 + i; }
    }
    0
}

#[cfg(test)]
encoding_index_tests::single_byte_tests! {
}