Initial project setup - Phases 1-3 complete

ProxyCore/Sources/Shared/WildcardMatcher.swift

@@ -0,0 +1,40 @@
+import Foundation
+
+public enum WildcardMatcher {
+    /// Matches a string against a glob pattern with `*` (zero or more chars) and `?` (single char).
+    public static func matches(_ string: String, pattern: String) -> Bool {
+        let s = Array(string.lowercased())
+        let p = Array(pattern.lowercased())
+        return matchHelper(s, 0, p, 0)
+    }
+
+    private static func matchHelper(_ s: [Character], _ si: Int, _ p: [Character], _ pi: Int) -> Bool {
+        var si = si
+        var pi = pi
+        var starIdx = -1
+        var matchIdx = 0
+
+        while si < s.count {
+            if pi < p.count && (p[pi] == "?" || p[pi] == s[si]) {
+                si += 1
+                pi += 1
+            } else if pi < p.count && p[pi] == "*" {
+                starIdx = pi
+                matchIdx = si
+                pi += 1
+            } else if starIdx != -1 {
+                pi = starIdx + 1
+                matchIdx += 1
+                si = matchIdx
+            } else {
+                return false
+            }
+        }
+
+        while pi < p.count && p[pi] == "*" {
+            pi += 1
+        }
+
+        return pi == p.count
+    }
+}