Function parseNumberFormat

packages/common/src/i18n/format_number.ts:303–359

(format: string, minusSign = '-')

}

function parseNumberFormat(format: string, minusSign = '-'): ParsedNumberFormat {
  const p = {
    minInt: 1,
    minFrac: 0,
    maxFrac: 0,
    posPre: '',
    posSuf: '',
    negPre: '',
    negSuf: '',
    gSize: 0,
    lgSize: 0,
  };

  const patternParts = format.split(PATTERN_SEP);
  const positive = patternParts[0];
  const negative = patternParts[1];

  const positiveParts =
      positive.indexOf(DECIMAL_SEP) !== -1
        ? positive.split(DECIMAL_SEP)
        : [
            positive.substring(0, positive.lastIndexOf(ZERO_CHAR) + 1),
            positive.substring(positive.lastIndexOf(ZERO_CHAR) + 1),
          ],
    integer = positiveParts[0],
    fraction = positiveParts[1] || '';

  p.posPre = integer.substring(0, integer.indexOf(DIGIT_CHAR));

  for (let i = 0; i < fraction.length; i++) {
    const ch = fraction.charAt(i);
    if (ch === ZERO_CHAR) {
      p.minFrac = p.maxFrac = i + 1;
    } else if (ch === DIGIT_CHAR) {
      p.maxFrac = i + 1;
    } else {
      p.posSuf += ch;
    }
  }

  const groups = integer.split(GROUP_SEP);
  p.gSize = groups[1] ? groups[1].length : 0;
  p.lgSize = groups[2] || groups[1] ? (groups[2] || groups[1]).length : 0;

  if (negative) {
    const trunkLen = positive.length - p.posPre.length - p.posSuf.length,
      pos = negative.indexOf(DIGIT_CHAR);

    p.negPre = negative.substring(0, pos).replace(/'/g, '');
    p.negSuf = negative.slice(pos + trunkLen).replace(/'/g, '');
  } else {
    p.negPre = minusSign + p.posPre;
    p.negSuf = p.posSuf;
  }

  return p;
}