Add KOReader option

tests/e2e/helpers/tar.js

@@ -0,0 +1,33 @@
+/**
+ * Parse a tar archive (uncompressed) and return a map of entry name -> Buffer.
+ */
+function parseTar(buffer) {
+  const entries = {};
+  let offset = 0;
+
+  while (offset < buffer.length) {
+    const header = buffer.subarray(offset, offset + 512);
+    if (header.every(b => b === 0)) break;
+
+    let name = header.subarray(0, 100).toString('utf8').replace(/\0+$/, '');
+    const prefix = header.subarray(345, 500).toString('utf8').replace(/\0+$/, '');
+    if (prefix) name = prefix + '/' + name;
+    name = name.replace(/^\.\//, '');
+
+    const sizeStr = header.subarray(124, 136).toString('utf8').replace(/\0+$/, '').trim();
+    const size = parseInt(sizeStr, 8) || 0;
+    const typeFlag = header[156];
+
+    offset += 512;
+
+    if (typeFlag === 48 || typeFlag === 0) {
+      entries[name] = buffer.subarray(offset, offset + size);
+    }
+
+    offset += Math.ceil(size / 512) * 512;
+  }
+
+  return entries;
+}
+
+module.exports = { parseTar };