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aws/lambda-nodejs18.x/UpdateZulipStreams/node_modules/aws-sdk/lib/browserHashUtils.js

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+var Buffer = require('buffer/').Buffer;
+
+/**
+ * This is a polyfill for the static method `isView` of `ArrayBuffer`, which is
+ * e.g. missing in IE 10.
+ *
+ * @api private
+ */
+if (
+    typeof ArrayBuffer !== 'undefined' &&
+    typeof ArrayBuffer.isView === 'undefined'
+) {
+    ArrayBuffer.isView = function(arg) {
+        return viewStrings.indexOf(Object.prototype.toString.call(arg)) > -1;
+    };
+}
+
+/**
+ * @api private
+ */
+var viewStrings = [
+    '[object Int8Array]',
+    '[object Uint8Array]',
+    '[object Uint8ClampedArray]',
+    '[object Int16Array]',
+    '[object Uint16Array]',
+    '[object Int32Array]',
+    '[object Uint32Array]',
+    '[object Float32Array]',
+    '[object Float64Array]',
+    '[object DataView]',
+];
+
+/**
+ * @api private
+ */
+function isEmptyData(data) {
+    if (typeof data === 'string') {
+        return data.length === 0;
+    }
+    return data.byteLength === 0;
+}
+
+/**
+ * @api private
+ */
+function convertToBuffer(data) {
+    if (typeof data === 'string') {
+        data = new Buffer(data, 'utf8');
+    }
+
+    if (ArrayBuffer.isView(data)) {
+        return new Uint8Array(data.buffer, data.byteOffset, data.byteLength / Uint8Array.BYTES_PER_ELEMENT);
+    }
+
+    return new Uint8Array(data);
+}
+
+/**
+ * @api private
+ */
+module.exports = exports = {
+    isEmptyData: isEmptyData,
+    convertToBuffer: convertToBuffer,
+};