function resolveYamlInteger()

in brooklyn-ui/src/main/webapp/assets/js/libs/js-yaml.js [2949:3037]


function resolveYamlInteger(data) {
  if (null === data) {
    return false;
  }

  var max = data.length,
      index = 0,
      hasDigits = false,
      ch;

  if (!max) { return false; }

  ch = data[index];

  // sign
  if (ch === '-' || ch === '+') {
    ch = data[++index];
  }

  if (ch === '0') {
    // 0
    if (index+1 === max) { return true; }
    ch = data[++index];

    // base 2, base 8, base 16

    if (ch === 'b') {
      // base 2
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') { continue; }
        if (ch !== '0' && ch !== '1') {
          return false;
        }
        hasDigits = true;
      }
      return hasDigits;
    }


    if (ch === 'x') {
      // base 16
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') { continue; }
        if (!isHexCode(data.charCodeAt(index))) {
          return false;
        }
        hasDigits = true;
      }
      return hasDigits;
    }

    // base 8
    for (; index < max; index++) {
      ch = data[index];
      if (ch === '_') { continue; }
      if (!isOctCode(data.charCodeAt(index))) {
        return false;
      }
      hasDigits = true;
    }
    return hasDigits;
  }

  // base 10 (except 0) or base 60

  for (; index < max; index++) {
    ch = data[index];
    if (ch === '_') { continue; }
    if (ch === ':') { break; }
    if (!isDecCode(data.charCodeAt(index))) {
      return false;
    }
    hasDigits = true;
  }

  if (!hasDigits) { return false; }

  // if !base60 - done;
  if (ch !== ':') { return true; }

  // base60 almost not used, no needs to optimize
  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
}