/**
 * Convert a UTF-8 encoded bytes into a JS UTF-16 string
 */
export declare function bytesToString(buf: Uint8Array): string;
/**
 * Convert JS UTF-16 string into UTF-8 encoded bytes
 */
export declare function stringToBytes(str: string): Uint8Array;
/**
 * Compute the length of a JS string when encoded as UTF-8 bytes
 */
export declare function strUTF8Len(s: string): number;
/**
 * Given a JS string `s` and an index `idx` of a character in it, compute the
 * corresponding byte offset of the character in the UTF-8 encoding of the
 * string.
 */
export declare function strUTF16IndexToUTF8Offset(s: string, idx: number): number;
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