按规划继续工作

结论：参数文件 restore/save 已通过解释器 WASM C ABI 直连 vendored LinuxCNC，native 与 host/WASM/browser 验证全部通过。

wasm-port/tests/wasm/node/verify_interp_wasm.mjs

@@ -134,4 +134,73 @@ verifyExpectedOutput(
     "utf8",
   ).trimEnd(),
 );
+
+const parameterFilePath = "/work/rs274ngc.var";
+interp.writeTextFile(
+  parameterFilePath,
+  [
+    "5161 10.5",
+    "5162 20.25",
+    "5220 1",
+    "5221 2.25",
+    "5399 44",
+    "<_named_param> 123",
+    "",
+  ].join("\n"),
+);
+verifyExpectedOutput(
+  "restore_parameters",
+  interp.restoreParameters(parameterFilePath),
+  [
+    "restore_parameters=0",
+    "parameter_5161=10.5",
+    "parameter_5162=20.25",
+    "parameter_5220=1",
+    "parameter_5221=2.25",
+    "parameter_5399=44",
+  ].join("\n"),
+);
+verifyExpectedOutput(
+  "restore_parameters_missing_file",
+  interp.restoreParameters("/work/missing.var"),
+  "restore_parameters=0",
+);
+
+const outOfOrderParameterFilePath = "/work/out-of-order.var";
+interp.writeTextFile(outOfOrderParameterFilePath, "5220 1\n5161 2\n");
+verifyExpectedOutput(
+  "restore_parameters_out_of_order",
+  interp.restoreParameters(outOfOrderParameterFilePath),
+  [
+    "restore_parameters=5",
+    "restore_error_text=Parameter file out of order",
+  ].join("\n"),
+);
+
+verifyExpectedOutput(
+  "save_parameters",
+  interp.saveParameters(parameterFilePath, {
+    5161: 12.34,
+    5162: 56.78,
+    5220: 1.0,
+    5221: 9.87,
+    5399: 66.6,
+  }),
+  [
+    "save_parameters=0",
+    "parameter_5161=12.34",
+    "parameter_5162=56.78",
+    "parameter_5220=1",
+    "parameter_5221=9.87",
+    "parameter_5399=66.6",
+  ].join("\n"),
+);
+const savedParameterFile = interp.readTextFile(parameterFilePath);
+const backupParameterFile = interp.readTextFile(`${parameterFilePath}.bak`);
+assert.equal(savedParameterFile.includes("5161\t12.340000"), true);
+assert.equal(savedParameterFile.includes("5162\t56.780000"), true);
+assert.equal(savedParameterFile.includes("5221\t9.870000"), true);
+assert.equal(savedParameterFile.includes("5399\t66.600000"), true);
+assert.equal(savedParameterFile.includes("_named_param"), false);
+assert.equal(backupParameterFile.includes("5161 10.5"), true);
 console.log("interp_wasm_node_smoke=ok");