@amaui/utils/esm/hexadecimalStringToBinary.js

Utils

import isValid from './isValid';

const hexadecimalStringToBinary = value_ => {
  if (isValid('hexadecimal-string', value_)) {
    let value = '';
    const meta = value_.substring(0, 2);
    const values = value_.substring(2);
    const regular = meta === '00';
    const withoutPadding = meta === '02';
    const remainAsIs = meta.indexOf('1') === 0 && meta.split('').map(item => +item);
    const lookup = {
      0: '0000',
      1: '0001',
      2: '0010',
      3: '0011',
      4: '0100',
      5: '0101',
      6: '0110',
      7: '0111',
      8: '1000',
      9: '1001',
      'a': '1010',
      'b': '1011',
      c: '1100',
      d: '1101',
      e: '1110',
      f: '1111'
    };
    let parts = values.toLowerCase().split('');
    if (remainAsIs) parts = parts.slice(0, -remainAsIs[1]);

    for (const [index, part] of parts.entries()) {
      value += !(index === parts.length - 1 && withoutPadding) ? lookup[part] : parseInt(lookup[part], 2).toString(2);
    }

    if (remainAsIs) value += values.slice(values.length - remainAsIs[1]);
    return value;
  }
};

export default hexadecimalStringToBinary;