pub static TABLE_DECODER: [u8; 256]Expand description
Table of length 256, mapping any u8 to the value it represents
0xff values represent None. Doing it this way instead of Option<u8> halves
the size of this table (u8 is 1 byte, Option<u8> is 2 bytes)
This table could be shrinked to just 96 elements, holding the range 32..128,
but keeping it length 256 means it’s possible to index into this table with
any arbitrary byte value without going out of bounds, saving a check for a
value to be within 32..128.