double-double/src/str-to-dd/get-num-leading-zeros-before-point.ts

Pure double-double precision functions *with strict error bounds*.

/**
 * Returns the number of leading zeros before the decimal point.
 * 
 * @param str 
 * 
 * @internal
 */
function getNumLeadingZerosBeforePoint(str: string) {
    if (str.startsWith('0.')) { return 0; }
    if (Number(str) === 0) { return 0; }

    const idx = str.indexOf('.');

    return idx === -1 ? str.length : idx;
}


export { getNumLeadingZerosBeforePoint }