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address review: file masks fold case as /i does; the nesting check skips regular expression literals

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Dylan M. Taylor
2026-11-04 01:03:52 +00:00
parent e7dd6288e5
commit d647723df3
3 changed files with 90 additions and 5 deletions
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crates/script/src/prelude.js
+12 -2
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@@ -293,15 +293,25 @@ function Folder(path) {
this.__path = path === undefined ? "" : __str(path);
}
// ECMAScript's legacy case canonicalisation (what a `/i` regular expression compares with): the
// upper case form when it is one code unit, and not an ASCII letter for a non-ASCII one.
function __canon(ch) {
var u = ch.toUpperCase();
if (u.length !== 1) return ch;
if (ch.charCodeAt(0) >= 128 && u.charCodeAt(0) < 128) return ch;
return u;
}
// A case-insensitive `*` / `?` file mask match in time bounded by mask × name length (a
// regular expression of `.*` runs backtracks combinatorially on overlapping wildcards).
function __globMatch(mask, name) {
// Wildcards run over the original name (lowercasing it can change its length: "İ" becomes
// two code units); literal characters compare case-insensitively one at a time.
// two code units); literal characters compare one at a time, case-insensitively as `/i` does
// ("ς" and "σ" and "Σ" match each other).
var p = mask, s = name;
var i = 0, j = 0, star = -1, mark = 0;
while (j < s.length) {
if (i < p.length && (p[i] === "?" || p[i] === s[j] || p[i].toLowerCase() === s[j].toLowerCase())) { i++; j++; }
if (i < p.length && (p[i] === "?" || p[i] === s[j] || __canon(p[i]) === __canon(s[j]))) { i++; j++; }
else if (i < p.length && p[i] === "*") { star = i++; mark = j; }
else if (star !== -1) { i = star + 1; j = ++mark; }
else return false;