1static FORWARD_TABLE: &'static [u16] = &[
13 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142,
14 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157,
15 158, 159, 160, 260, 261, 321, 8364, 8222, 352, 167, 353, 169, 536, 171,
16 377, 173, 378, 379, 176, 177, 268, 322, 381, 8221, 182, 183, 382, 269, 537,
17 187, 338, 339, 376, 380, 192, 193, 194, 258, 196, 262, 198, 199, 200, 201,
18 202, 203, 204, 205, 206, 207, 272, 323, 210, 211, 212, 336, 214, 346, 368,
19 217, 218, 219, 220, 280, 538, 223, 224, 225, 226, 259, 228, 263, 230, 231,
20 232, 233, 234, 235, 236, 237, 238, 239, 273, 324, 242, 243, 244, 337, 246,
21 347, 369, 249, 250, 251, 252, 281, 539, 255,
22];
23
24#[inline]
26pub fn forward(code: u8) -> u16 {
27 FORWARD_TABLE[(code - 0x80) as usize]
28}
29
30static BACKWARD_TABLE_LOWER: &'static [u8] = &[
31 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,
32 0, 0, 0, 0, 0, 0, 0, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138,
33 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153,
34 154, 155, 156, 157, 158, 159, 160, 0, 0, 0, 0, 0, 0, 167, 0, 169, 0, 171,
35 0, 173, 0, 0, 176, 177, 0, 0, 0, 0, 182, 183, 0, 0, 0, 187, 0, 0, 0, 0,
36 192, 193, 194, 0, 196, 0, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
37 0, 0, 210, 211, 212, 0, 214, 0, 0, 217, 218, 219, 220, 0, 0, 223, 224, 225,
38 226, 0, 228, 0, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 0, 0,
39 242, 243, 244, 0, 246, 0, 0, 249, 250, 251, 252, 0, 0, 255, 0, 0, 195, 227,
40 161, 162, 197, 229, 0, 0, 0, 0, 178, 185, 0, 0, 208, 240, 0, 0, 0, 0, 0, 0,
41 221, 253, 0, 0, 0, 0, 0, 0, 0, 163, 179, 209, 241, 0, 0, 0, 0, 0, 0, 0, 0,
42 0, 0, 0, 213, 245, 188, 189, 0, 0, 0, 0, 0, 0, 215, 247, 0, 0, 0, 0, 166,
43 168, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 216, 248, 0, 0, 0, 0, 0, 0,
44 190, 172, 174, 175, 191, 180, 184, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
45 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 170, 186, 222, 254, 0, 0, 0, 0, 0, 0,
46 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,
47 0, 0, 181, 165, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 164, 0, 0, 0, 0, 0,
48 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
49];
50
51static BACKWARD_TABLE_UPPER: &'static [u16] = &[
52 0, 0, 0, 0, 32, 64, 96, 128, 160, 0, 192, 224, 0, 0, 0, 0, 256, 0, 0, 0, 0,
53 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,
54 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,
55 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,
56 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,
57 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,
58 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,
59 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,
60 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,
61 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,
62 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 288, 0, 0, 0, 0, 320,
63];
64
65#[inline]
67pub fn backward(code: u32) -> u8 {
68 let offset = (code >> 5) as usize;
69 let offset = if offset < 262 {BACKWARD_TABLE_UPPER[offset] as usize} else {0};
70 BACKWARD_TABLE_LOWER[offset + ((code & 31) as usize)]
71}
72
73#[cfg(test)]
74single_byte_tests!(
75 mod = iso_8859_16
76);