@awayfl/avm2/dist/lib/nat/as3ToLowerCase.js

Virtual machine for executing AS3 code

/**
 * AS3 has a bug when converting a certain character range to lower case.
 */
export function as3ToLowerCase(value) {
    var chars = null;
    for (var i = 0; i < value.length; i++) {
        var charCode = value.charCodeAt(i);
        if (charCode >= 0x10A0 && charCode <= 0x10C5) {
            if (!chars) {
                chars = new Array(value.length);
            }
            chars[i] = String.fromCharCode(charCode + 48);
        }
    }
    if (chars) {
        // Fill in remaining chars if the bug needs to be emulated.
        for (var i = 0; i < chars.length; i++) {
            var char = chars[i];
            if (!char) {
                chars[i] = value.charAt(i).toLocaleString();
            }
        }
        return chars.join('');
    }
    return value.toLowerCase();
}