char-info/dist/indicators.js

Unicode character information library.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BasicCharClassIndicator = void 0;
function binarySearchInIntervals(intervals) {
    return function bin(start, end, char) {
        if (start > end) {
            return false;
        }
        const mid = (start + end) >> 1;
        const midInterval = intervals[mid];
        if (midInterval.low > char) {
            return bin(start, mid - 1, char);
        }
        if (midInterval.high < char) {
            return bin(mid + 1, end, char);
        }
        return true;
    };
}
/** Basic implementation for the CharClassIndicator, using binary search in an array of ranges. */
class BasicCharClassIndicator {
    constructor(_group) {
        this._group = _group;
        const intervals = _group.intervals;
        this._binarySearchInIntervals = binarySearchInIntervals(intervals);
        this.char = this.char.bind(this);
        this.code = this.code.bind(this);
    }
    code(char) {
        const intervals = this._group.intervals;
        return this._binarySearchInIntervals(0, intervals.length - 1, char);
    }
    char(char) {
        if (char === "")
            return false;
        return this.code(char.codePointAt(0));
    }
}
exports.BasicCharClassIndicator = BasicCharClassIndicator;
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