export function toAscii(input: string): Uint8Array {
    const toNums = (str: string): readonly number[] =>
        str.split('').map((x: string) => {
            const charCode = x.charCodeAt(0);
            // 0x00–0x1F control characters
            // 0x20–0x7E printable characters
            // 0x7F delete character
            // 0x80–0xFF out of 7 bit ascii range
            if (charCode < 0x20 || charCode > 0x7e) {
                throw new Error('Cannot encode character that is out of printable ASCII range: ' + charCode);
            }
            return charCode;
        });
    return Uint8Array.from(toNums(input));
}

export function fromAscii(data: Uint8Array): string {
    const fromNums = (listOfNumbers: readonly number[]): readonly string[] =>
        listOfNumbers.map((x: number): string => {
            // 0x00–0x1F control characters
            // 0x20–0x7E printable characters
            // 0x7F delete character
            // 0x80–0xFF out of 7 bit ascii range
            if (x < 0x20 || x > 0x7e) {
                throw new Error('Cannot decode character that is out of printable ASCII range: ' + x);
            }
            return String.fromCharCode(x);
        });

    return fromNums(Array.from(data)).join('');
}