locutus/tcl/string/match.js

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

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.match = match;
function globToRegExp(pattern) {
    let regex = '^';
    let i = 0;
    while (i < pattern.length) {
        const char = pattern[i];
        if (char === '\\') {
            const next = pattern[i + 1];
            if (next) {
                regex += `\\${next}`;
                i += 2;
            }
            else {
                regex += '\\\\';
                i += 1;
            }
            continue;
        }
        if (char === '*') {
            regex += '.*';
            i += 1;
            continue;
        }
        if (char === '?') {
            regex += '.';
            i += 1;
            continue;
        }
        if (char === '[') {
            const end = pattern.indexOf(']', i + 1);
            if (end > i + 1) {
                let content = pattern.slice(i + 1, end);
                if (content.startsWith('!')) {
                    content = `^${content.slice(1)}`;
                }
                regex += `[${content}]`;
                i = end + 1;
                continue;
            }
        }
        if ('\\.^$+{}()|'.includes(char)) {
            regex += `\\${char}`;
        }
        else {
            regex += char;
        }
        i += 1;
    }
    regex += '$';
    return new RegExp(regex);
}
function match(pattern, str) {
    //      discuss at: https://locutus.io/tcl/match/
    // parity verified: Tcl 8.6
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Uses Tcl-style glob pattern matching (`*`, `?`, and character classes like `[a-z]`).
    //       example 1: match('h*o', 'hello')
    //       returns 1: 1
    //       example 2: match('file?.txt', 'file1.txt')
    //       returns 2: 1
    //       example 3: match('a[0-9]', 'ab')
    //       returns 3: 0
    const regex = globToRegExp(String(pattern));
    return regex.test(String(str)) ? 1 : 0;
}