Method hexToString

src/fontbox/afm/parser.ts:493–511

(hexString: string)

  // Low-level parsing methods

  private hexToString(hexString: string): string {
    if (hexString.length < 2) {
      throw new Error(`Error: Expected hex string of length >= 2 not='${hexString}'`);
    }

    if (hexString[0] !== "<" || hexString[hexString.length - 1] !== ">") {
      throw new Error(`String should be enclosed by angle brackets '${hexString}'`);
    }

    const hex = hexString.slice(1, -1);
    const bytes = new Uint8Array(hex.length / 2);

    for (let i = 0; i < hex.length; i += 2) {
      bytes[i / 2] = Number.parseInt(hex.slice(i, i + 2), 16);
    }

    // ISO-8859-1 decoding
    return String.fromCharCode(...bytes);
  }

  private tokenize(line: string): string[] {
    // Split on whitespace and semicolons, keeping semicolons as tokens