locutus/php/strings/strcspn.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.strcspn = strcspn;
function strcspn(str, mask, start, length) {
    //      discuss at: https://locutus.io/php/strcspn/
    // parity verified: PHP 8.3
    //     original by: Brett Zamir (https://brett-zamir.me)
    //      revised by: Theriault
    //       example 1: strcspn('abcdefg123', '1234567890')
    //       returns 1: 7
    //       example 2: strcspn('123abc', '1234567890')
    //       returns 2: 0
    //       example 3: strcspn('abcdefg123', '1234567890', 1)
    //       returns 3: 6
    //       example 4: strcspn('abcdefg123', '1234567890', -6, -5)
    //       returns 4: 1
    start = start || 0;
    length = typeof length === 'undefined' ? str.length : length || 0;
    if (start < 0) {
        start = str.length + start;
    }
    if (length < 0) {
        length = str.length - start + length;
    }
    const e = Math.min(str.length, start + length);
    if (start < 0 || start >= str.length || length <= 0) {
        return 0;
    }
    let lgth = 0;
    for (let i = start; i < e; i++) {
        if (mask.includes(str.charAt(i))) {
            break;
        }
        ++lgth;
    }
    return lgth;
}