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work around missing tilde character in huffman tree

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p2r3
2026-08-14 09:57:21 +03:00
parent b12948bbef
commit bdc3c33026
1 changed files with 14 additions and 1 deletions
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compress.js
+14 -1
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@@ -264,7 +264,20 @@ export function compress (input, alphabet) {
huffmanNumber = huffmanEncode(huffmanNumber, pathEncode["%"]); huffmanNumber = huffmanEncode(huffmanNumber, pathEncode["%"]);
i -= 2; i -= 2;
} else { } else {
huffmanNumber = huffmanEncode(huffmanNumber, pathEncode[segment.value[i]]); if (segment.value[i] === "~") {
/**
* HACK HACK HACK!!!
* Our Huffman tree is missing the tilde character (whoops!)
* It's too late to change it now without bumping the version
* number, and that currently costs 1 bit. Tildes are so rare
* that it makes more sense to %-encode them instead.
*/
huffmanNumber *= 256n;
huffmanNumber += BigInt(126);
huffmanNumber = huffmanEncode(huffmanNumber, pathEncode["%"]);
} else {
huffmanNumber = huffmanEncode(huffmanNumber, pathEncode[segment.value[i]]);
}
} }
} }
// Encode segment variant as 0 // Encode segment variant as 0