Function consumeNumber

tensorboard/components/vz_sorting/sorting.ts:66–102

(s: string, i: number)

}

function consumeNumber(s: string, i: number): number {
  enum State {
    NATURAL,
    REAL,
    EXPONENT_SIGN,
    EXPONENT,
  }
  let state = State.NATURAL;
  for (; i < s.length; i++) {
    if (state === State.NATURAL) {
      if (s[i] === '.') {
        state = State.REAL;
      } else if (s[i] === 'e' || s[i] === 'E') {
        state = State.EXPONENT_SIGN;
      } else if (!isDigit(s[i])) {
        break;
      }
    } else if (state === State.REAL) {
      if (s[i] === 'e' || s[i] === 'E') {
        state = State.EXPONENT_SIGN;
      } else if (!isDigit(s[i])) {
        break;
      }
    } else if (state === State.EXPONENT_SIGN) {
      if (isDigit(s[i]) || s[i] === '+' || s[i] === '-') {
        state = State.EXPONENT;
      } else {
        break;
      }
    } else if (state === State.EXPONENT) {
      if (!isDigit(s[i])) {
        break;
      }
    }
  }
  return i;
}

function isDigit(c: string): boolean {
  return '0' <= c && c <= '9';