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Merge pull request #19446 from Snuffleupagus/shorten-MeshStreamReader-readBits

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Shorten the `MeshStreamReader.prototype.readBits` method a little bit
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Tim van der Meij 2025-02-09 12:57:53 +01:00 committed by GitHub
commit 8ba8e75d6c
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1 changed files with 10 additions and 15 deletions
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25
src/core/pattern.js
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@ -340,24 +340,19 @@ class MeshStreamReader {
} }
readBits(n) { readBits(n) {
let buffer = this.buffer; const { stream } = this;
let bufferLength = this.bufferLength; let { buffer, bufferLength } = this;
if (n === 32) { if (n === 32) {
if (bufferLength === 0) { if (bufferLength === 0) {
return ( return stream.getInt32() >>> 0;
((this.stream.getByte() << 24) |
(this.stream.getByte() << 16) |
(this.stream.getByte() << 8) |
this.stream.getByte()) >>>
0
);
} }
buffer = buffer =
(buffer << 24) | (buffer << 24) |
(this.stream.getByte() << 16) | (stream.getByte() << 16) |
(this.stream.getByte() << 8) | (stream.getByte() << 8) |
this.stream.getByte(); stream.getByte();
const nextByte = this.stream.getByte(); const nextByte = stream.getByte();
this.buffer = nextByte & ((1 << bufferLength) - 1); this.buffer = nextByte & ((1 << bufferLength) - 1);
return ( return (
((buffer << (8 - bufferLength)) | ((buffer << (8 - bufferLength)) |
@ -366,10 +361,10 @@ class MeshStreamReader {
); );
} }
if (n === 8 && bufferLength === 0) { if (n === 8 && bufferLength === 0) {
return this.stream.getByte(); return stream.getByte();
} }
while (bufferLength < n) { while (bufferLength < n) {
buffer = (buffer << 8) | this.stream.getByte(); buffer = (buffer << 8) | stream.getByte();
bufferLength += 8; bufferLength += 8;
} }
bufferLength -= n; bufferLength -= n;