1 files changed, 38 insertions, 0 deletions
diff --git a/src/civetweb/src/third_party/duktape-1.8.0/polyfills/duktape-isfastint.js b/src/civetweb/src/third_party/duktape-1.8.0/polyfills/duktape-isfastint.js
new file mode 100644
index 000000000..68219e42b
--- /dev/null
+++ b/src/civetweb/src/third_party/duktape-1.8.0/polyfills/duktape-isfastint.js
@@ -0,0 +1,38 @@
+/*
+ *  Helper to check if a number is internally represented as a fastint:
+ *
+ *    if (Duktape.isFastint(x)) {
+ *        print('fastint');
+ *    } else {
+ *        print('not a fastint (or not a number)');
+ *    }
+ *
+ *  NOTE: This helper depends on the internal tag numbering (defined in
+ *  duk_tval.h) which is both version specific and depends on whether
+ *  duk_tval is packed or not.
+ */
+
+if (typeof Duktape === 'object') {
+    if (typeof Duktape.fastintTag === 'undefined') {
+        Object.defineProperty(Duktape, 'fastintTag', {
+            /* Tag number depends on duk_tval packing. */
+            value: (Duktape.info(true)[1] >= 0xfff0) ?
+                    0xfff1 /* tag for packed duk_tval */ :
+                    1 /* tag for unpacked duk_tval */,
+            writable: false,
+            enumerable: false,
+            configurable: true
+        });
+    }
+    if (typeof Duktape.isFastint === 'undefined') {
+        Object.defineProperty(Duktape, 'isFastint', {
+            value: function (v) {
+                return Duktape.info(v)[0] === 4 &&                 /* public type is DUK_TYPE_NUMBER */
+                       Duktape.info(v)[1] === Duktape.fastintTag;  /* internal tag is fastint */
+            },
+            writable: false,
+            enumerable: false,
+            configurable: true
+        });
+    }
+}