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change to using once_cell for lazy init

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This commit is contained in:
Henry Schimke
2023-01-05 10:53:55 -06:00
parent d2a4b21808
commit 20764559ae
37 changed files with 556 additions and 608 deletions
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24
src/pdf417/decoder/decoded_bit_stream_parser.rs
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@@ -80,30 +80,28 @@ const MIXED_CHARS: [char; 25] = [
'$', '/', '+', '%', '*', '=', '^',
];
use lazy_static::lazy_static;
use once_cell::sync::Lazy;
lazy_static! {
/**
* Table containing values for the exponent of 900.
* This is used in the numeric compaction decode algorithm.
*/
static ref EXP900 : Vec<BigUint> = {
const EXP_LEN :usize= 16;
/**
* Table containing values for the exponent of 900.
* This is used in the numeric compaction decode algorithm.
*/
static EXP900: Lazy<Vec<BigUint>> = Lazy::new(|| {
const EXP_LEN: usize = 16;
let mut exp900 = Vec::with_capacity(EXP_LEN); //[0;16];
exp900.push(ToBigUint::to_biguint(&1).unwrap());
let nineHundred = ToBigUint::to_biguint(&900).unwrap();
exp900.push(nineHundred);
let mut i = 2;
while i < EXP_LEN {
// for (int i = 2; i < EXP900.length; i++) {
exp900.push( &exp900[i - 1] * 900_u32);
// for (int i = 2; i < EXP900.length; i++) {
exp900.push(&exp900[i - 1] * 900_u32);
i+=1;
i += 1;
}
exp900
};
}
});
// /**
// * Table containing values for the exponent of 900.