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Code Issues Releases Wiki Activity

var_bit improvements

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This commit is contained in:
Robin Appelman 2022-05-25 20:39:24 +02:00
commit 67d08f06da
2 changed files with 15 additions and 17 deletions
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31
src/demo/message/packetentities.rs
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@ -11,7 +11,6 @@ use parse_display::{Display, FromStr};
use std::cmp::{min, Ordering};
use std::fmt;
use std::hint::unreachable_unchecked;
use std::num::NonZeroU32;
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
@ -145,32 +144,23 @@ fn read_bit_var<'a, T: BitReadSized<'a, LittleEndian>>(stream: &mut Stream<'a>)
0 => 4,
1 => 8,
2 => 12,
3 => 32,
_ => unsafe { unreachable_unchecked() },
_ => 32,
};
stream.read_sized(bits)
}
fn write_bit_var(var: u32, stream: &mut BitWriteStream<LittleEndian>) -> ReadResult<()> {
let ty: u8 = if var >= 2u32.pow(12) {
3
let (ty, bits): (u8, usize) = if var >= 2u32.pow(12) {
(3, 32)
} else if var >= 2u32.pow(8) {
2
(2, 12)
} else if var >= 2u32.pow(4) {
1
(1, 8)
} else {
0
(0, 4)
};
ty.write_sized(stream, 2)?;
let bits = match ty {
0 => 4,
1 => 8,
2 => 12,
3 => 32,
_ => unsafe { unreachable_unchecked() },
};
var.write_sized(stream, bits)
}
@ -198,6 +188,13 @@ fn test_bit_var_roundtrip() {
bit_var_normal(1234567);
bit_var_normal(12345678);
bit_var_normal(123456789);
bit_var_normal(u32::MAX);
for i in 0..31 {
bit_var_normal(2u32.pow(i) as u32);
bit_var_normal(2u32.pow(i) as u32 - 1);
bit_var_normal(2u32.pow(i) as u32 + 1);
}
}
#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]