import { PatternError } from '../errors.js';
export function parseAffixToken(src, pos, onError) {
    const char = src[pos];
    switch (char) {
        case '%':
            return { char: '%', style: 'percent', width: 1 };
        case '‰':
            return { char: '%', style: 'permille', width: 1 };
        case '¤': {
            let width = 1;
            while (src[++pos] === '¤')
                ++width;
            switch (width) {
                case 1:
                    return { char, currency: 'default', width };
                case 2:
                    return { char, currency: 'iso-code', width };
                case 3:
                    return { char, currency: 'full-name', width };
                case 5:
                    return { char, currency: 'narrow', width };
                default: {
                    const msg = `Invalid number (${width}) of ¤ chars in pattern`;
                    onError(new PatternError('¤', msg));
                    return null;
                }
            }
        }
        case '*': {
            const pad = src[pos + 1];
            if (pad)
                return { char, pad, width: 2 };
            break;
        }
        case '+':
        case '-':
            return { char, width: 1 };
        case "'": {
            let str = src[++pos];
            let width = 2;
            if (str === "'")
                return { char, str, width };
            while (true) {
                const next = src[++pos];
                ++width;
                if (next === undefined) {
                    const msg = `Unterminated quoted literal in pattern: ${str}`;
                    onError(new PatternError("'", msg));
                    return { char, str, width };
                }
                else if (next === "'") {
                    if (src[++pos] !== "'")
                        return { char, str, width };
                    else
                        ++width;
                }
                str += next;
            }
        }
    }
    return null;
}