/**
 * Decomposes a floating-point number into a normalized fraction and an integer power of 2.
 * Similar to C's frexp function.
 * @param {number} value - The floating-point number to decompose
 * @param {number[]} exponent where to write exponent to
 * @param {number} [offset_into_exponent]
 * @returns {number} mantissa
 */
export function frexp(value: number, exponent: number[], offset_into_exponent?: number): number;
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