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node_modules/esptool-js/lib/util.js

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+/**
+ * Pad to the next alignment boundary
+ * @param {Uint8Array} data Uint8Array data to pad
+ * @param {number} alignment Alignment boundary to fulfill
+ * @param {number} padCharacter Character to fill with
+ * @returns {Uint8Array} Padded UInt8Array image
+ */
+export function padTo(data, alignment, padCharacter = 0xff) {
+    const padMod = data.length % alignment;
+    if (padMod !== 0) {
+        const padding = new Uint8Array(alignment - padMod).fill(padCharacter);
+        const paddedData = new Uint8Array(data.length + padding.length);
+        paddedData.set(data);
+        paddedData.set(padding, data.length);
+        return paddedData;
+    }
+    return data;
+}