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putting stuff back does not require mutation

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This commit is contained in:
Andrew Kelley 2025-07-28 22:16:52 -07:00
parent 05ce1f99a6
commit 4741a16d9a
1 changed files with 0 additions and 12 deletions
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12
lib/std/compress/flate/Decompress.zig
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@ -500,17 +500,10 @@ fn takeBitsRuntime(d: *Decompress, n: u4) !u16 {
fn alignBitsDiscarding(d: *Decompress) void {
const remaining_bits = d.remaining_bits;
const next_bits = d.next_bits;
if (remaining_bits == 0) return;
const discard_bits = remaining_bits % 8;
const n_bytes = remaining_bits / 8;
var put_back_bits = next_bits >> discard_bits;
const in = d.input;
in.seek -= n_bytes;
for (in.buffer[in.seek..][0..n_bytes]) |*b| {
b.* = @truncate(put_back_bits);
put_back_bits >>= 8;
}
d.remaining_bits = 0;
d.next_bits = 0;
}
@ -521,11 +514,6 @@ fn alignBitsPreserving(d: *Decompress) void {
const n_bytes = (remaining_bits + 7) / 8;
const in = d.input;
in.seek -= n_bytes;
var put_back_bits = d.next_bits;
for (in.buffer[in.seek..][0..n_bytes]) |*b| {
b.* = @truncate(put_back_bits);
put_back_bits >>= 8;
}
d.remaining_bits = 0;
d.next_bits = 0;
}